:root {
    --ink: #20201d;
    --muted: #6f6d66;
    --paper: #f7f4ed;
    --surface: #fffdf8;
    --line: #ded9cd;
    --accent: #d84a36;
    --accent-dark: #ad3021;
    --accent-soft: #fbe8e3;
    --accent-rgb: 216, 74, 54;
    --success: #287a52;
    --success-soft: #e7f4ec;
    --warning: #986a12;
    --warning-soft: #fff4d8;
    --shadow: 0 18px 50px rgba(48, 43, 34, 0.09);
    --shell-max-width: 2200px;
    --shell-left-column: minmax(13rem, 15rem);
    --shell-right-column: minmax(21rem, 24rem);
    --shell-gap: clamp(1rem, 1.5vw, 2rem);
}

html[data-appearance-theme="spring"] {
    --accent: #cf5c83;
    --accent-dark: #a93d63;
    --accent-soft: #fbe8ef;
    --accent-rgb: 207, 92, 131;
    --paper: #faf5f4;
}

html[data-appearance-theme="summer"] {
    --accent: #39865b;
    --accent-dark: #246841;
    --accent-soft: #e5f3e9;
    --accent-rgb: 57, 134, 91;
    --paper: #f5f8f1;
}

html[data-appearance-theme="autumn"] {
    --accent: #d26a32;
    --accent-dark: #a94b20;
    --accent-soft: #f9e9dc;
    --accent-rgb: 210, 106, 50;
    --paper: #faf5ed;
}

html[data-appearance-theme="winter"] {
    --accent: #527ba8;
    --accent-dark: #365e89;
    --accent-soft: #e5edf7;
    --accent-rgb: 82, 123, 168;
    --paper: #f3f6f8;
}

html[data-appearance-theme="dark"] {
    --ink: #f1eee7;
    --muted: #aaa69c;
    --paper: #171918;
    --surface: #222522;
    --line: #3d403b;
    --accent: #df6652;
    --accent-dark: #ff8a76;
    --accent-soft: #3d2925;
    --accent-rgb: 223, 102, 82;
    --success: #70c493;
    --success-soft: #20372a;
    --warning: #e1b766;
    --warning-soft: #3b321f;
    --shadow: 0 18px 50px rgba(0, 0, 0, .26);
    color-scheme: dark;
}

* { box-sizing: border-box; }

html {
    font-size: 17px;
    scrollbar-gutter: stable;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    background:
        radial-gradient(circle at 12% 8%, rgba(var(--accent-rgb), 0.09), transparent 28rem),
        var(--paper);
    font: 1rem/1.55 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button, input { font: inherit; }
strong, b { font-weight: 700; }
a { color: inherit; }

.app-shell {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: var(--shell-left-column) minmax(0, 1fr);
    gap: var(--shell-gap);
    width: min(var(--shell-max-width), calc(100% - 2rem));
    margin: 0 auto;
}

.app-shell-review,
.app-shell-profile {
    grid-template-columns:
        var(--shell-left-column)
        minmax(0, 1fr)
        var(--shell-right-column);
}

.app-sidebar {
    position: sticky;
    top: 1rem;
    display: flex;
    height: calc(100vh - 2rem);
    min-height: 32rem;
    align-self: start;
    flex-direction: column;
    margin-top: 1rem;
    padding: 1.35rem;
    background: rgba(255, 253, 248, .72);
    border: 1px solid rgba(222, 217, 205, .85);
    border-radius: 1.35rem;
    box-shadow: 0 14px 40px rgba(48, 43, 34, .06);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: .65rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-decoration: none;
}

.brand-mark {
    display: grid;
    width: 2.25rem;
    height: 2.25rem;
    place-items: center;
    color: white;
    background: var(--accent);
    border-radius: .7rem;
    font-family: Georgia, serif;
    font-size: 1.25rem;
}

.sidebar-profile {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: .65rem;
    margin-top: 1.5rem;
    padding: .7rem .75rem;
    color: var(--muted);
    background: rgba(255, 253, 248, .55);
    border: 1px solid var(--line);
    border-radius: .9rem;
    text-decoration: none;
}
.sidebar-profile:hover,
.sidebar-profile[aria-current="page"] {
    color: var(--accent-dark);
    background: var(--surface);
    border-color: rgba(var(--accent-rgb), .25);
}
.profile-avatar {
    display: inline-grid;
    width: 2.15rem;
    height: 2.15rem;
    flex: 0 0 auto;
    place-items: center;
    color: white;
    background: var(--accent);
    border-radius: 50%;
    font-size: .85rem;
    font-weight: 700;
}
.sidebar-profile-copy {
    display: grid;
    min-width: 0;
    gap: .05rem;
}
.sidebar-profile-copy strong {
    overflow: hidden;
    color: var(--ink);
    font-size: .9rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.sidebar-profile-copy > span {
    font-size: .68rem;
}
.sidebar-profile-arrow {
    color: var(--muted);
    font-size: 1.25rem;
    line-height: 1;
}
.sidebar-profile-meta {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
}
.sidebar-profile.is-guest { cursor: pointer; }
.guest-mode-indicator {
    display: grid;
    gap: .12rem;
    margin-top: .65rem;
    padding: .65rem .75rem;
    color: var(--accent-dark);
    background: var(--accent-soft);
    border: 1px solid rgba(var(--accent-rgb), .22);
    border-radius: .75rem;
}
.guest-mode-indicator strong { font-size: .78rem; }
.guest-mode-indicator span { color: var(--muted); font-size: .68rem; line-height: 1.35; }

@media (max-width: 780px) {
    .guest-mode-indicator {
        margin: .45rem 0 0;
    }
}
.sidebar-change-count {
    display: inline-grid;
    min-width: 1.45rem;
    height: 1.45rem;
    place-items: center;
    padding: 0 .3rem;
    color: var(--accent-dark);
    background: var(--accent-soft);
    border-radius: 999px;
    font-size: .68rem;
    font-weight: 700;
}

.sidebar-nav {
    display: grid;
    gap: .4rem;
    margin-top: 1.5rem;
}
.sidebar-label {
    margin: 0 0 .25rem;
    color: var(--muted);
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
}
.sidebar-nav a {
    display: grid;
    gap: .05rem;
    padding: .7rem .8rem;
    color: var(--muted);
    border: 1px solid transparent;
    border-radius: .8rem;
    font-weight: 600;
    text-decoration: none;
}
.sidebar-nav a strong { color: var(--ink); font-size: .95rem; }
.sidebar-nav a span { font-size: .72rem; }
.sidebar-nav a:hover,
.sidebar-nav a[aria-current="page"] {
    color: var(--accent-dark);
    background: var(--surface);
    border-color: rgba(var(--accent-rgb), .16);
}
.sidebar-nav a[aria-current="page"] {
    box-shadow: inset 3px 0 0 var(--accent);
}
.sidebar-design-control {
    display: grid;
    gap: .45rem;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
}
.sidebar-design-label {
    color: var(--muted);
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
}
.sidebar-option-label,
.sidebar-option-field > span {
    color: var(--muted);
    font-size: .68rem;
    font-weight: 700;
}
.sidebar-option-field {
    display: grid;
    gap: .22rem;
}
.sidebar-option-field select {
    width: 100%;
    min-width: 0;
    padding: .4rem .55rem;
    color: var(--ink);
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: .55rem;
    cursor: pointer;
    font-size: .72rem;
    font-weight: 600;
}
.design-shape-switch {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .2rem;
    padding: .2rem;
    background: var(--paper);
    border-radius: .65rem;
}
.design-shape-switch button {
    min-width: 0;
    padding: .4rem .45rem;
    color: var(--muted);
    background: transparent;
    border: 0;
    border-radius: .45rem;
    cursor: pointer;
    font-size: .72rem;
    font-weight: 600;
}
.design-shape-switch button.is-active {
    color: white;
    background: #6d6962;
    box-shadow: 0 2px 7px rgba(48, 43, 34, .13);
}

.seasonal-effects {
    position: fixed;
    z-index: 1000;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}
.seasonal-backdrop {
    position: fixed;
    pointer-events: none;
    user-select: none;
}
.seasonal-backdrop-sakura {
    top: -1.5rem;
    left: 0;
    width: min(60rem, 58vw);
    height: auto;
    max-height: 76vh;
    object-fit: contain;
    object-position: left top;
    -webkit-mask-image: linear-gradient(to right, #000 0%, #000 72%, transparent 100%);
    mask-image: linear-gradient(to right, #000 0%, #000 72%, transparent 100%);
}
html[data-decoration-side="right"] .seasonal-backdrop-edge {
    right: 0;
    left: auto;
    transform: scaleX(-1);
}
.seasonal-backdrop-sakura-base {
    z-index: 0;
    opacity: .4;
}
.seasonal-backdrop-sakura-overlay {
    z-index: 2;
    opacity: .055;
}
.seasonal-particle {
    position: absolute;
    top: -3rem;
    left: var(--particle-x);
    width: var(--particle-size);
    height: var(--particle-size);
    object-fit: contain;
    opacity: .5;
    animation: seasonal-fall var(--particle-duration) linear infinite;
    animation-delay: var(--particle-delay);
    filter: drop-shadow(0 1px 1px rgba(48, 43, 34, .08));
}
.seasonal-particle-sakura { opacity: .56; }
.seasonal-particle-leaves { opacity: .54; }
.seasonal-particle-leaves.seasonal-particle-variant-1 {
    filter: hue-rotate(-18deg) saturate(1.2) drop-shadow(0 1px 1px rgba(48, 43, 34, .1));
}
.seasonal-particle-leaves.seasonal-particle-variant-2 {
    filter: hue-rotate(15deg) saturate(1.12) drop-shadow(0 1px 1px rgba(48, 43, 34, .1));
}
.seasonal-particle-snow {
    opacity: .52;
    filter: brightness(0) saturate(100%) invert(55%) sepia(15%) saturate(1034%) hue-rotate(172deg) brightness(92%) contrast(86%) drop-shadow(0 1px 1px rgba(48, 43, 34, .08));
}

@keyframes seasonal-fall {
    0% { transform: translate3d(0, -5vh, 0) rotate(0deg); }
    100% { transform: translate3d(var(--particle-drift), 108vh, 0) rotate(var(--particle-turns)); }
}

@media (prefers-reduced-motion: reduce) {
    .seasonal-effects { display: none; }
}

@media (max-width: 780px) {
    .seasonal-backdrop-sakura {
        top: 0;
        left: 0;
        width: min(44rem, 112vw);
        max-height: 62vh;
    }
    html[data-decoration-side="right"] .seasonal-backdrop-edge {
        right: 0;
        left: auto;
    }
    .seasonal-backdrop-sakura-base { opacity: .2; }
    .seasonal-backdrop-sakura-overlay { opacity: .035; }
}

html[data-appearance-theme="dark"] .app-sidebar {
    background: rgba(28, 31, 29, .88);
    border-color: rgba(61, 64, 59, .9);
    box-shadow: 0 14px 40px rgba(0, 0, 0, .2);
}
html[data-appearance-theme="dark"] .sidebar-profile,
html[data-appearance-theme="dark"] .word-change-details {
    background: rgba(34, 37, 34, .72);
}
html[data-appearance-theme="dark"] .card {
    border-color: var(--line);
}
html[data-appearance-theme="dark"] input,
html[data-appearance-theme="dark"] select,
html[data-appearance-theme="dark"] textarea,
html[data-appearance-theme="dark"] .field input,
html[data-appearance-theme="dark"] .field select {
    color: var(--ink);
    background-color: #1b1e1c;
    border-color: var(--line);
}
html[data-appearance-theme="dark"] .profile-review-notice,
html[data-appearance-theme="dark"] .alert-info {
    color: #9bd0dc;
    background: #21343a;
    border-color: #365964;
}
html[data-appearance-theme="dark"] .profile-review-notice small {
    color: #82b3bd;
}
html[data-appearance-theme="dark"] .word-change-filters a span,
html[data-appearance-theme="dark"] .bulk-toolbar,
html[data-appearance-theme="dark"] .session-settings,
html[data-appearance-theme="dark"] .review-mode,
html[data-appearance-theme="dark"] .difficulty-options span,
html[data-appearance-theme="dark"] .session-progress,
html[data-appearance-theme="dark"] .answer-comparison {
    background: rgba(34, 37, 34, .72);
}
html[data-appearance-theme="dark"] .word-change-card > summary:hover,
html[data-appearance-theme="dark"] .word-table tbody tr:hover {
    background: rgba(255, 255, 255, .045);
}
html[data-appearance-theme="dark"] .alert-success { border-color: #3c664e; }
html[data-appearance-theme="dark"] .alert-warning { border-color: #6d5b31; }
html[data-appearance-theme="dark"] .alert-error { border-color: #74443b; }
html[data-appearance-theme="dark"] .session-review-watermark {
    color: rgba(241, 238, 231, .07);
}
html[data-appearance-theme="dark"] .seasonal-backdrop-sakura-base {
    opacity: .3;
}
html[data-appearance-theme="dark"] .seasonal-backdrop-sakura-overlay {
    opacity: .04;
}

.page {
    width: 100%;
    max-width: none;
    margin: 1rem 0 5rem;
}

.page-narrow {
    width: min(680px, 100%);
    margin-right: auto;
    margin-left: auto;
}
.page-word-form {
    width: min(82rem, 100%);
    margin-right: auto;
}
.page-word-form > .lede { margin-bottom: 1.25rem; }
.word-form-card {
    display: grid;
    gap: 1.25rem;
    padding: clamp(1.25rem, 2vw, 2rem);
}
.word-form-card > .field,
.word-form-card > .counter-form-section,
.word-form-card > .word-form-classification-grid,
.word-form-card > .word-form-details-grid,
.word-form-card > .form-actions {
    margin-bottom: 0;
}
.word-form-classification-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    gap: 1rem;
}
.word-form-classification-grid > .field,
.word-form-details-grid > .field { margin-bottom: 0; }
.word-form-details-grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(12rem, 1fr);
    align-items: end;
    gap: 1rem;
}
.page-review {
    width: 100%;
    margin-top: 1rem;
}
.review-heading,
.page-review > .session-settings,
.page-review > .alert {
    max-width: 62rem;
}
.review-heading > .lede { margin-bottom: 1.25rem; }
.eyebrow { margin: 0 0 .4rem; color: var(--accent); font-size: .78rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, p { margin-top: 0; }
h1, h2, h3 { font-weight: 700; }
h1 { margin-bottom: .65rem; font-family: Georgia, "Times New Roman", serif; font-size: clamp(2.6rem, 4vw, 3.5rem); line-height: 1.05; letter-spacing: -.035em; }
.lede { max-width: 44rem; margin-bottom: 2rem; color: var(--muted); font-size: 1.08rem; }

.page-profile {
    max-width: none;
    margin-top: 1rem;
    margin-bottom: 1rem;
}
.profile-page-heading {
    display: flex;
    min-height: 5rem;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1.5rem;
    margin-bottom: 1rem;
    padding: 0 .25rem;
}
.profile-page-heading h1 { margin: 0; }
.profile-page-heading > p {
    max-width: 28rem;
    margin: 0 0 .35rem;
    color: var(--muted);
    text-align: right;
}
.profile-overview { display: grid; gap: .9rem; padding: 1.25rem; }
.profile-switcher-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
}
.profile-switcher-heading h2 { margin: 0; font-size: 1.25rem; }
.profile-switcher-heading > span { color: var(--muted); font-size: .75rem; }
.profile-overview-heading {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.profile-overview-heading h2 { margin: 0; font-size: 2rem; }
.profile-overview-heading p:last-child {
    margin: .25rem 0 0;
    color: var(--muted);
}
.profile-avatar-large { width: 4rem; height: 4rem; font-size: 1.45rem; }
.profile-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem; }
.profile-option {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: .8rem;
    padding: .8rem;
    background: var(--paper);
    border: 1px solid transparent;
    border-radius: .9rem;
}
.profile-option.is-active {
    background: var(--accent-soft);
    border-color: rgba(var(--accent-rgb), .2);
}
.profile-option > div { display: grid; }
.profile-option > div span { color: var(--muted); font-size: .78rem; }
.profile-current {
    padding: .2rem .5rem;
    color: var(--accent-dark);
    background: var(--surface);
    border-radius: 999px;
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
}
.profile-dashboard { margin-top: 1.25rem; }
.profile-dashboard-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
}
.profile-dashboard-heading h2 { margin-bottom: 1rem; }
.profile-dashboard-heading > span {
    padding: .25rem .55rem;
    color: var(--muted);
    background: var(--paper);
    border-radius: 999px;
    font-size: .72rem;
    font-weight: 600;
}
.session-statistics.profile-statistics {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    margin-bottom: 1.5rem;
}
.profile-dashboard-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
    gap: 1.25rem;
}
.profile-dashboard-grid > section {
    min-width: 0;
    padding: 1rem;
    background: var(--paper);
    border-radius: 1rem;
}
.profile-dashboard-grid h3 { margin: 0 0 .8rem; }
.profile-empty-stat { color: var(--muted); font-size: .88rem; }
.profile-mode-stat {
    display: grid;
    grid-template-columns: minmax(7rem, 1fr) repeat(4, auto);
    gap: .6rem;
    padding: .65rem 0;
    border-top: 1px solid var(--line);
    font-size: .8rem;
}
.profile-mode-stat:first-of-type { border-top: 0; }
.profile-mode-stat span { color: var(--muted); }
.recent-session {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    align-items: center;
    gap: .7rem;
    padding: .65rem 0;
    border-top: 1px solid var(--line);
    font-size: .82rem;
    color: inherit;
    text-decoration: none;
}
.recent-session:hover { color: var(--accent-dark); }
.recent-session:first-of-type { border-top: 0; }
.recent-session > div { display: grid; }
.recent-session span { color: var(--muted); }
.profile-data-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--line);
}
.profile-data-controls > div { display: grid; }
.profile-data-controls span { color: var(--muted); font-size: .8rem; }
.profile-data-controls > div > span { max-width: 34rem; }
.session-history-details { margin-top: 1.25rem; }
.session-history-meta {
    display: flex;
    flex-wrap: wrap;
    gap: .4rem;
    margin: -.55rem 0 1rem;
    color: var(--muted);
    font-size: .85rem;
}
.session-history-statistics { margin-bottom: 1.25rem; }
.session-attempt-history { display: grid; gap: .55rem; }
.session-attempt {
    overflow: hidden;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: .8rem;
}
.session-attempt summary {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto auto;
    align-items: center;
    gap: .65rem;
    padding: .75rem;
    cursor: pointer;
    list-style: none;
}
.session-attempt summary::-webkit-details-marker { display: none; }
.session-attempt-position {
    display: grid;
    width: 1.7rem;
    height: 1.7rem;
    place-items: center;
    color: var(--muted);
    background: var(--surface);
    border-radius: 50%;
    font-size: .72rem;
    font-weight: 700;
}
.session-attempt summary > span:nth-last-child(2) {
    color: var(--muted);
    font-size: .78rem;
}
.session-attempt-outcome {
    padding: .2rem .5rem;
    border-radius: 999px;
    font-size: .72rem !important;
    font-weight: 700;
}
.outcome-correct .session-attempt-outcome {
    color: var(--success);
    background: var(--success-soft);
}
.outcome-incorrect .session-attempt-outcome {
    color: var(--accent-dark);
    background: var(--accent-soft);
}
.outcome-skipped .session-attempt-outcome {
    color: var(--muted);
    background: var(--surface);
}
.session-attempt-answer {
    display: grid;
    gap: .55rem;
    margin: 0;
    padding: .85rem 1rem 1rem 3.1rem;
    background: var(--surface);
    border-top: 1px solid var(--line);
}
.session-attempt-answer > div {
    display: grid;
    grid-template-columns: 6rem minmax(0, 1fr);
    gap: .75rem;
}
.session-attempt-answer dt { color: var(--muted); font-size: .78rem; }
.session-attempt-answer dd { margin: 0; overflow-wrap: anywhere; }
.word-change-review,
.demo-word-note { margin-top: 1.25rem; }
.word-change-review.is-loading {
    opacity: .65;
    pointer-events: none;
    transition: opacity .12s ease;
}
.profile-review-notice {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1.25rem;
    padding: .85rem 1rem;
    color: #35606d;
    background: #e8f3f5;
    border: 1px solid #bfdde2;
    border-radius: .85rem;
    text-decoration: none;
}
.profile-review-notice > span:first-child { display: grid; }
.profile-review-notice small { color: #51727b; }
.profile-review-notice > span:last-child { flex: 0 0 auto; font-weight: 700; }
.profile-review-notice:hover { border-color: #8fc6d0; }
.word-change-review-heading,
.demo-drafts-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}
.word-change-review-heading h2,
.demo-drafts-heading h2 { margin-bottom: .25rem; }
.word-change-review-heading p:last-child { margin: 0; color: var(--muted); }
.word-change-count,
.demo-drafts-heading > span {
    display: grid;
    min-width: 2rem;
    height: 2rem;
    place-items: center;
    color: var(--accent-dark);
    background: var(--accent-soft);
    border-radius: 999px;
    font-weight: 700;
}
.word-change-filters {
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
    margin-bottom: .9rem;
    padding: .3rem;
    background: var(--paper);
    border-radius: .75rem;
}
.word-change-filters a {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .4rem .65rem;
    color: var(--muted);
    border-radius: .55rem;
    font-size: .78rem;
    font-weight: 600;
    text-decoration: none;
}
.word-change-filters a span {
    display: inline-grid;
    min-width: 1.35rem;
    height: 1.35rem;
    place-items: center;
    padding: 0 .25rem;
    background: rgba(255, 255, 255, .7);
    border-radius: 999px;
    font-size: .66rem;
}
.word-change-filters a.is-active {
    color: var(--accent-dark);
    background: var(--surface);
    box-shadow: 0 2px 8px rgba(48, 43, 34, .07);
}
.word-change-card {
    margin-top: .6rem;
    overflow: hidden;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: .8rem;
}
.word-change-card > summary {
    display: grid;
    grid-template-columns: minmax(10rem, 1fr) minmax(12rem, 1.2fr) auto auto;
    min-height: 4.4rem;
    align-items: center;
    gap: .75rem;
    padding: .7rem .85rem;
    cursor: pointer;
    list-style: none;
}
.word-change-card > summary::-webkit-details-marker { display: none; }
.word-change-card > summary:hover { background: rgba(255, 255, 255, .45); }
.word-change-card > summary > div {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: .65rem;
}
.word-change-card > summary h3 {
    margin: 0;
    overflow: hidden;
    font-family: Georgia, "Yu Mincho", serif;
    font-size: 1.2rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.word-change-summary-meta { display: grid; min-width: 0; color: var(--muted); font-size: .76rem; }
.word-change-summary-meta > span { overflow: hidden; color: var(--ink); text-overflow: ellipsis; white-space: nowrap; }
.word-change-summary-meta small { font-size: .68rem; }
.word-change-toggle { color: var(--accent-dark); font-size: .75rem; font-weight: 700; white-space: nowrap; }
.word-change-toggle-open { display: none; }
.word-change-card[open] .word-change-toggle-closed { display: none; }
.word-change-card[open] .word-change-toggle-open { display: inline; }
.word-change-details {
    padding: .85rem;
    background: rgba(255, 253, 248, .72);
    border-top: 1px solid var(--line);
}
.draft-status,
.change-conflict {
    display: inline-flex;
    width: fit-content;
    padding: .2rem .5rem;
    color: var(--accent-dark);
    background: var(--accent-soft);
    border-radius: 999px;
    font-size: .68rem;
    font-weight: 700;
    text-transform: uppercase;
}
.word-table .draft-status { margin-left: .5rem; vertical-align: middle; }
.change-conflict { color: var(--warning); background: var(--warning-soft); }
.word-version-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .75rem;
    margin-top: 0;
}
.word-version-grid > :only-child { grid-column: 1 / -1; }
.word-version {
    min-width: 0;
    padding: .9rem;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: .8rem;
}
.word-version-demo { border-color: rgba(var(--accent-rgb), .3); }
.word-version .word-ruby { font-size: 1.25rem; }
.word-version > div > p { margin: .55rem 0; overflow-wrap: anywhere; }
.word-version-details { display: grid; gap: .35rem; margin: .65rem 0 0; }
.word-version-details > div { display: grid; grid-template-columns: 3rem 1fr; gap: .5rem; }
.word-version-details dt { color: var(--muted); font-size: .72rem; font-weight: 600; }
.word-version-details dd { margin: 0; font-size: .78rem; overflow-wrap: anywhere; }
.word-version-empty { color: var(--muted); }
.word-version-delete { color: var(--danger); font-weight: 700; }
.word-change-actions {
    display: flex;
    justify-content: flex-end;
    gap: .6rem;
    margin-top: .9rem;
}
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.word-change-pagination { margin-top: 1rem; }
.word-change-pagination > span { color: var(--muted); font-size: .78rem; text-align: center; }
.pagination .is-disabled { opacity: .45; pointer-events: none; }
.demo-word-note p:not(.eyebrow) { color: var(--muted); }
.demo-draft-notice {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.demo-draft-notice > span { display: grid; }
.demo-draft-notice a { flex: 0 0 auto; color: inherit; font-weight: 700; }
.demo-drafts {
    margin-bottom: 1.25rem;
    padding: 1.25rem;
}
.demo-drafts-heading p:last-child { max-width: 42rem; margin: .25rem 0 0; color: var(--muted); }
.demo-draft-summary {
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
    margin-bottom: .25rem;
}
.demo-draft-summary > span {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .35rem .6rem;
    color: var(--muted);
    background: var(--paper);
    border-radius: 999px;
    font-size: .75rem;
}
.demo-draft-summary strong { color: var(--ink); }
.demo-draft-kind {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
}
.demo-draft-kind-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: .65rem;
}
.demo-draft-kind-heading h3 { margin: 0; font-size: 1rem; }
.demo-draft-kind-heading p { margin: .1rem 0 0; color: var(--muted); font-size: .75rem; }
.demo-draft-kind-heading > span {
    display: inline-grid;
    min-width: 1.6rem;
    height: 1.6rem;
    place-items: center;
    color: var(--accent-dark);
    background: var(--accent-soft);
    border-radius: 999px;
    font-size: .72rem;
    font-weight: 700;
}
.demo-draft-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .8rem 0;
    border-top: 1px solid var(--line);
}
.demo-draft-row > input {
    width: 1rem;
    height: 1rem;
    flex: 0 0 auto;
    accent-color: var(--accent);
    cursor: pointer;
}
.demo-draft-row > div:first-of-type { min-width: 0; flex: 1; }
.demo-draft-row:first-of-type { border-top: 0; }
.demo-draft-row p { margin: .25rem 0 0; color: var(--muted); }
.demo-draft-row .actions { flex-wrap: wrap; }
.demo-draft-change-row {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: .8rem;
    margin-top: .45rem;
    padding: .7rem .8rem;
    background: var(--paper);
    border-radius: .75rem;
}
.demo-draft-change-row:target { outline: 3px solid rgba(var(--accent-rgb), .16); }
.demo-draft-change-row > div:nth-child(2) { min-width: 0; }
.demo-draft-change-row p { margin: .15rem 0 0; color: var(--muted); font-size: .75rem; }
.draft-status { text-decoration: none; }
.profile-side-rail {
    position: sticky;
    top: 1rem;
    height: auto;
    max-height: calc(100vh - 2rem);
    min-height: 0;
    align-self: start;
    margin-top: 1rem;
    margin-bottom: 1rem;
}
.learning-insights {
    display: flex;
    height: auto;
    max-height: calc(100vh - 2rem);
    min-height: 0;
    flex-direction: column;
    overflow-y: auto;
    padding: 1.25rem;
}
.learning-insights-heading h2 {
    margin-bottom: .25rem;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.65rem;
}
.learning-insights-heading > p:last-child {
    margin-bottom: .9rem;
    color: var(--muted);
    font-size: .75rem;
}
.insight-tabs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .35rem;
    padding: .25rem;
    margin-right: 3.15rem;
    background: var(--paper);
    border-radius: .75rem;
}
.insight-tabs button {
    padding: .45rem .6rem;
    color: var(--muted);
    background: transparent;
    border: 0;
    border-radius: .55rem;
    cursor: pointer;
    font-size: .8rem;
    font-weight: 600;
}
.insight-tabs button.is-active {
    color: var(--accent-dark);
    background: var(--surface);
    box-shadow: 0 2px 8px rgba(48, 43, 34, .07);
}
.insight-tabs button:disabled {
    cursor: default;
    opacity: .45;
}
.insight-control-area {
    position: relative;
}
.insight-browser {
    min-height: 20.75rem;
    padding-right: 3.15rem;
}
.insight-mode-tabs {
    position: absolute;
    z-index: 2;
    top: 0;
    right: -2.5rem;
    display: grid;
    gap: 0;
    margin: 0;
    padding: 0;
    background: transparent;
}
.insight-mode-tabs button {
    position: relative;
    width: 3.15rem;
    min-height: 4.75rem;
    padding: .45rem .6rem;
    color: #65625c;
    background: #efebe3;
    border: 1px solid #d5cfc3;
    border-radius: 0;
    cursor: pointer;
    font-family: "Yu Gothic", "Hiragino Sans", Meiryo, sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1;
    text-orientation: upright;
    writing-mode: vertical-rl;
}
.insight-mode-tabs button + button {
    margin-top: -.3rem;
}
.insight-mode-tabs button:first-child {
    border-radius: .9rem 0 0 0;
}
.insight-mode-tabs button:last-child {
    border-radius: 0 0 0 .9rem;
}
.insight-mode-tabs button:hover {
    color: var(--ink);
    background: #e5e0d7;
}
.insight-mode-tabs button.is-active {
    z-index: 3;
    color: white;
    background: #66625b;
    border-color: #4f4b45;
    box-shadow: -4px 5px 12px rgba(48, 43, 34, .16);
}
.insight-panels { min-width: 0; }
.insight-list {
    min-height: 0;
    margin-top: .8rem;
    overflow: visible;
}
.insight-list[hidden] { display: none; }
.insight-mode-heading {
    margin: 0 0 .35rem;
    color: var(--muted);
    font-size: .7rem;
    font-weight: 600;
    letter-spacing: .02em;
}
.insight-all-placeholder { min-height: 12rem; }
.insight-all-placeholder .insight-empty {
    display: grid;
    min-height: 12rem;
    align-content: center;
}
.insight-empty {
    padding: 1rem;
    color: var(--muted);
    background: var(--paper);
    border-radius: .8rem;
    text-align: center;
}
.insight-empty p { margin: .35rem 0 0; font-size: .78rem; }
.insight-word {
    padding: .75rem .2rem;
    border-top: 1px solid var(--line);
}
.insight-word:first-child { border-top: 0; }
.insight-word > div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
}
.insight-word ruby { font-family: Georgia, "Yu Mincho", serif; font-size: 1.2rem; }
.insight-word rt {
    color: #675f54;
    font-size: .7em;
    font-weight: 600;
    letter-spacing: .03em;
}
.insight-word > div > strong { color: var(--accent-dark); }
.insight-word p { margin: .25rem 0 0; color: var(--muted); font-size: .75rem; }

.card {
    padding: clamp(1.35rem, 4vw, 2.5rem);
    background: var(--surface);
    border: 1px solid rgba(222, 217, 205, .9);
    border-radius: 1.35rem;
    box-shadow: var(--shadow);
}

.button {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    justify-content: center;
    padding: .65rem 1rem;
    color: white;
    background: var(--accent);
    border: 1px solid var(--accent);
    border-radius: .75rem;
    cursor: pointer;
    font-weight: 600;
    text-decoration: none;
}
.button:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
.button-secondary { color: var(--ink); background: transparent; border-color: var(--line); }
.button-secondary:hover { background: var(--paper); border-color: var(--line); }
.button-danger { color: var(--accent-dark); background: transparent; border-color: var(--line); }
.button-danger:hover { background: var(--accent-soft); border-color: var(--accent-soft); }
.button-small { min-height: 2.25rem; padding: .35rem .65rem; font-size: .88rem; }

.alert { margin-bottom: 1.25rem; padding: .9rem 1rem; border: 1px solid; border-radius: .8rem; }
.alert-success { color: var(--success); background: var(--success-soft); border-color: #b9ddc8; }
.alert-warning { color: var(--warning); background: var(--warning-soft); border-color: #ead392; }
.alert-error { color: var(--accent-dark); background: var(--accent-soft); border-color: #efb8ad; }
.alert-info { color: #35606d; background: #e8f3f5; border-color: #bfdde2; }

.flash-toast {
    position: fixed;
    top: 1.25rem;
    right: 1.25rem;
    z-index: 1400;
    width: min(28rem, calc(100vw - 2rem));
    margin: 0;
    box-shadow: 0 16px 45px rgba(48, 43, 34, .18);
    cursor: pointer;
    animation: flash-toast-enter .22s ease-out both;
}
.flash-toast.is-leaving {
    pointer-events: none;
    animation: flash-toast-leave .2s ease-in both;
}
@keyframes flash-toast-enter {
    from { opacity: 0; transform: translateY(-.75rem); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes flash-toast-leave {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-.5rem); }
}

.field { margin-bottom: 1.25rem; }
.field label, .field-label { display: block; margin-bottom: .45rem; font-size: .9rem; font-weight: 600; }
.field input,
.field select {
    width: 100%;
    min-height: 3rem;
    padding: .65rem .8rem;
    color: var(--ink);
    background: white;
    border: 1px solid var(--line);
    border-radius: .7rem;
    outline: none;
}
.field input:focus,
.field select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .13); }
.field input.input-error { border-color: var(--accent); }
.error { margin-top: .35rem; color: var(--accent-dark); font-size: .88rem; }
.form-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.75rem; }
.field-help { margin: -.2rem 0 .75rem; color: var(--muted); font-size: .85rem; }
.translation-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .6rem; margin-bottom: .6rem; }
.translation-error { grid-column: 1 / -1; margin-top: -.3rem; }

.counter-form-section {
    min-width: 0;
    margin: 0 0 1.5rem;
    padding: 1rem;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 1rem;
}
.counter-form-section[hidden] { display: none; }
.counter-form-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: .75rem;
}
.counter-form-heading .field-help { margin-bottom: 0; }
.counter-form-table {
    display: grid;
    max-height: min(31rem, 52vh);
    gap: .4rem;
    padding-right: .35rem;
    overflow-y: auto;
    scrollbar-gutter: stable;
}
.counter-form-row {
    display: grid;
    grid-template-columns: 5.25rem minmax(9rem, 1fr) minmax(10rem, 1fr)
        minmax(14rem, 1.35fr) minmax(0, auto);
    align-items: center;
    gap: .5rem;
}
.counter-form-row input {
    width: 100%;
    min-width: 0;
    min-height: 2.7rem;
    padding: .55rem .65rem;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: .65rem;
}
.counter-form-row input:focus {
    border-color: var(--accent);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .13);
}
.counter-form-row input[readonly] {
    color: var(--muted);
    background: var(--surface-muted);
}
.counter-form-labels {
    position: sticky;
    top: 0;
    z-index: 1;
    padding: .25rem 0;
    color: var(--muted);
    background: var(--paper);
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
}
.counter-page { max-width: 76rem; }
.counter-browser {
    display: grid;
    grid-template-columns: minmax(10rem, 14rem) minmax(0, 1fr);
    align-items: start;
    gap: 1.25rem;
}
.counter-index {
    position: sticky;
    top: 1rem;
    display: grid;
    gap: .45rem;
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
}
.counter-index a {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: .5rem;
    padding: .75rem .85rem;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: .8rem;
    text-decoration: none;
}
.counter-index a:hover { border-color: var(--accent); }
.counter-index strong { font-size: 1.15rem; }
.counter-index span { color: var(--muted); font-size: .85rem; }
.counter-cards { display: grid; gap: 1rem; }
.counter-card { padding: 1.25rem; scroll-margin-top: 1rem; }
.counter-card-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}
.counter-card-heading h2 { margin: .1rem 0; font-size: 2rem; }
.counter-card-heading rt { color: var(--muted); font-size: .45em; }
.counter-translations { margin: .35rem 0 0; color: var(--muted); }
.counter-card-actions { display: flex; align-items: center; gap: .5rem; }
.counter-reference-table { overflow-x: auto; }
.counter-reference-row {
    display: grid;
    grid-template-columns: 5rem minmax(8rem, 1fr) minmax(8rem, 1fr)
        minmax(9rem, 1.25fr);
    gap: 1rem;
    align-items: center;
    min-width: 34rem;
    padding: .7rem .75rem;
    border-top: 1px solid var(--line);
}
.counter-reference-head {
    color: var(--muted);
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
}
.counter-no-forms,
.counter-empty {
    display: grid;
    gap: .3rem;
    color: var(--muted);
}
.counter-no-forms { padding: 1rem; background: var(--paper); }
.counter-change-preview {
    display: grid;
    gap: .25rem;
    margin-top: .75rem;
    padding-top: .75rem;
    border-top: 1px solid var(--line);
    font-size: .85rem;
}

.exercise-question { margin: .2rem 0 2rem; font-family: Georgia, serif; font-size: clamp(2.4rem, 9vw, 5rem); line-height: 1.1; text-align: center; }
.exercise-meta { min-height: 1.75rem; text-align: center; }
.exercise-clue { width: fit-content; margin: -1.15rem auto 1.5rem; padding: .45rem .75rem; color: var(--muted); background: var(--paper); border-radius: .65rem; text-align: center; }
.exercise-clue strong { color: var(--ink); }
.exercise-hint { margin: -1rem 0 1.5rem; text-align: center; }
.exercise-hint-text { max-width: 32rem; margin: .8rem auto 0; padding: .75rem 1rem; color: var(--ink); background: var(--paper); border: 1px solid var(--line); border-radius: .8rem; font-family: Georgia, "Yu Mincho", serif; font-size: 1.2rem; }
.exercise-fields { max-width: 32rem; margin: 0 auto; }
.field-hint { margin-bottom: 1rem; color: var(--muted); text-align: center; }
.answer-entry {
    display: grid;
    grid-template-columns: 3.2rem minmax(0, 1fr);
    align-items: end;
    gap: .7rem;
}
.answer-type-symbol {
    display: grid;
    width: 3.2rem;
    height: 3.2rem;
    place-items: center;
    margin-bottom: 1.25rem;
    color: var(--accent-dark);
    background: var(--accent-soft);
    border: 1px solid rgba(var(--accent-rgb), .24);
    border-radius: 50%;
    font-family: Georgia, "Yu Mincho", serif;
    font-size: 1.35rem;
    font-weight: 700;
}
.exercise-actions { display: grid; grid-template-columns: 1fr auto; gap: .65rem; margin-top: .5rem; }
.exercise-actions .button:first-child { width: 100%; }
.answer-details { display: grid; grid-template-columns: 9rem 1fr; gap: .4rem 1rem; margin: 0; }
.answer-details dt { color: var(--muted); }
.answer-details dd { margin: 0; font-weight: 600; }
.empty-state { padding: 4rem 1.5rem; text-align: center; }
.empty-state h2 { font-family: Georgia, serif; font-size: 2rem; }

.list-toolbar { display: flex; align-items: end; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; }
.word-count { margin: 0; color: var(--muted); }
.word-collection-block {
    margin-bottom: 1.25rem;
    overflow: hidden;
    padding: 1.25rem;
}

@media (min-width: 1281px) {
    .words-body {
        overflow: hidden;
    }
    .app-shell-words {
        height: 100vh;
        min-height: 0;
    }
    .page-words {
        display: flex;
        height: 100vh;
        min-height: 0;
        flex-direction: column;
        margin: 0;
        padding: 1rem 0;
        overflow: hidden;
    }
    .page-words > * {
        flex: 0 0 auto;
    }
    .page-words .demo-drafts {
        max-height: min(32vh, 22rem);
        overflow-y: auto;
        scrollbar-gutter: stable;
    }
    .page-words .word-collection-block {
        display: grid;
        min-height: 0;
        flex: 1 1 auto;
        grid-template-rows: auto auto auto minmax(0, 1fr);
        margin-bottom: 0;
    }
    .page-words .word-table-wrap {
        min-height: 0;
        overflow: auto;
        scrollbar-gutter: stable;
    }
    .page-words .word-table thead {
        position: sticky;
        z-index: 2;
        top: 0;
        background: var(--surface);
        box-shadow: 0 1px 0 var(--line);
    }
}
.word-collection-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: .85rem;
}
.word-collection-heading h2 { margin: 0; }
.word-collection-heading > span {
    display: grid;
    min-width: 2rem;
    height: 2rem;
    place-items: center;
    color: var(--accent-dark);
    background: var(--accent-soft);
    border-radius: 999px;
    font-weight: 700;
}
.word-filters {
    display: flex;
    align-items: end;
    gap: .65rem;
    margin-bottom: .85rem;
    padding: .75rem;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: .9rem;
}
.word-filters label {
    display: grid;
    min-width: 9rem;
    gap: .25rem;
    color: var(--muted);
    font-size: .75rem;
    font-weight: 700;
}
.word-filters select {
    min-height: 2.35rem;
    padding: .35rem 2rem .35rem .65rem;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: .65rem;
}
.word-filter-empty { padding: 2rem 1rem; }
.word-filter-empty h3 { margin: 0 0 .4rem; }
.word-filter-empty p { margin: 0; color: var(--muted); }
.bulk-toolbar { display: flex; align-items: end; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; padding: .8rem 1rem; background: rgba(255,255,255,.65); border: 1px solid var(--line); border-radius: .9rem; }
.bulk-toolbar-integrated { background: var(--paper); }
.bulk-selection-controls, .bulk-update-controls { display: flex; align-items: center; gap: .65rem; }
.bulk-update-controls { align-items: end; }
.bulk-select-all { display: inline-flex; min-height: 2.35rem; align-items: center; gap: .5rem; padding: .4rem .7rem; background: var(--surface); border: 1px solid var(--line); border-radius: .7rem; cursor: pointer; font-size: .88rem; font-weight: 700; }
.bulk-select-all:hover { background: var(--paper); }
.bulk-select-all:has(input:checked) { color: var(--accent-dark); background: var(--accent-soft); border-color: rgba(var(--accent-rgb), .25); }
.bulk-select-all:has(input:focus-visible) { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .13); }
.bulk-select-all input { width: 1rem; height: 1rem; margin: 0; accent-color: var(--accent); cursor: pointer; }
.bulk-selection { display: inline-flex; min-height: 2.35rem; align-items: center; gap: .25rem; margin: 0; padding: .4rem .7rem; color: var(--muted); background: var(--paper); border-radius: .7rem; font-size: .9rem; line-height: 1; white-space: nowrap; }
.bulk-selection strong { color: var(--ink); }
.bulk-level-field { display: grid; gap: .25rem; color: var(--muted); font-size: .78rem; font-weight: 700; }
.bulk-level-field select { min-height: 2.35rem; padding: .35rem 2rem .35rem .65rem; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: .65rem; }
.button:disabled { opacity: .45; cursor: not-allowed; }
.confirmation-dialog { width: min(430px, calc(100% - 2rem)); padding: 1.5rem; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 1.2rem; box-shadow: 0 24px 70px rgba(48, 43, 34, .22); }
.confirmation-dialog::backdrop { background: rgba(32, 32, 29, .22); backdrop-filter: blur(2px); }
.confirmation-dialog[open] { animation: dialog-enter .16s ease-out; }
.confirmation-dialog h2 { margin: 0 0 .75rem; font-family: Georgia, "Times New Roman", serif; font-size: 1.7rem; }
.bulk-dialog-summary { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: .9rem; margin-top: 1rem; }
.bulk-dialog-level { display: grid; width: 3.6rem; height: 3.6rem; place-items: center; color: var(--accent-dark); background: var(--accent-soft); border: 1px solid rgba(var(--accent-rgb), .2); border-radius: 50%; font-weight: 700; }
.bulk-dialog-copy { display: grid; gap: .15rem; }
.bulk-dialog-copy span { color: var(--muted); }
.delete-dialog-word { margin: 1rem 0 .25rem; color: var(--accent-dark); font-family: Georgia, "Yu Mincho", serif; font-size: 2rem; font-weight: 700; }
.delete-dialog-description { margin: 0; color: var(--muted); }
.confirmation-dialog-actions { display: flex; justify-content: flex-end; gap: .65rem; margin-top: 1.5rem; }
@keyframes dialog-enter {
    from { opacity: 0; transform: translateY(.4rem) scale(.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
@media (prefers-reduced-motion: reduce) {
    .confirmation-dialog[open],
    .session-settings-dialog[open] { animation: none; }
}
.word-collection-block .word-table-wrap {
    margin: 0 -1.25rem -1.25rem;
    border-top: 1px solid var(--line);
}
.word-table-wrap { overflow-x: auto; padding: 0; }
.word-table { width: 100%; border-collapse: collapse; }
.word-table th, .word-table td { padding: 1rem 1.15rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
.word-table th { color: var(--muted); font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; }
.word-table tbody tr:last-child td { border-bottom: 0; }
.word-table tbody tr:hover { background: rgba(247, 244, 237, .7); }
.selection-cell { width: 3rem; text-align: center !important; }
.selection-cell input { width: 1rem; height: 1rem; accent-color: var(--accent); cursor: pointer; }
.japanese { font-family: Georgia, "Yu Mincho", serif; font-size: 1.35rem; font-weight: 700; }
.word-ruby { ruby-align: center; ruby-position: over; }
.word-ruby rt { color: var(--muted); font-family: Inter, "Yu Gothic", sans-serif; font-size: .68rem; font-weight: 600; letter-spacing: .02em; }
.actions { display: flex; justify-content: flex-end; gap: .5rem; white-space: nowrap; }
.actions form { display: inline; }
.jlpt-badge { display: inline-flex; align-items: center; justify-content: center; min-width: 2.25rem; padding: .18rem .5rem; color: var(--accent-dark); background: var(--accent-soft); border: 1px solid rgba(var(--accent-rgb), .2); border-radius: 999px; font-size: .75rem; font-weight: 700; letter-spacing: .04em; }
.unset-value { color: var(--muted); }
.word-type-badge { font-weight: 700; }
.word-verb-group { color: var(--muted); font-size: .82rem; }
.word-classification { margin: .2rem 0 0; color: var(--muted); font-size: .78rem; }

.session-settings {
    margin-bottom: 1rem;
    background: rgba(255,255,255,.62);
    border: 1px solid var(--line);
    border-radius: 1rem;
}
.session-settings-summary {
    display: flex;
    min-height: 3.5rem;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .85rem 1rem;
}
.session-settings-current {
    display: block;
    min-width: 0;
}
.session-settings-values {
    display: grid;
    grid-template-columns: repeat(3, minmax(6.5rem, auto));
    gap: .45rem;
}
.session-setting-value {
    display: grid;
    gap: .05rem;
    min-width: 0;
    padding: .4rem .6rem;
    background: var(--paper);
    border: 1px solid rgba(222, 217, 205, .72);
    border-radius: .65rem;
}
.session-setting-value small {
    color: var(--muted);
    font-size: .6rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
}
.session-setting-value strong { font-size: .86rem; }
.session-settings-action {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    gap: .35rem;
    padding: .45rem .65rem;
    color: var(--accent-dark);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: .65rem;
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .04em;
    cursor: pointer;
}
.session-settings-action:hover { background: var(--paper); }
.session-settings-action:focus-visible {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .13);
    outline: none;
}
.mistake-action-open { display: none; }
.session-mistake[open] .mistake-action-closed { display: none; }
.session-mistake[open] .mistake-action-open { display: inline; }
.session-settings-dialog {
    width: min(58rem, calc(100% - 2rem));
    max-height: calc(100dvh - 2rem);
    margin: auto;
    padding: 0;
    overflow: auto;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 1.25rem;
    box-shadow: 0 24px 70px rgba(48, 43, 34, .22);
}
.session-settings-dialog::backdrop {
    background: rgba(32, 32, 29, .28);
    backdrop-filter: blur(2px);
}
.session-settings-dialog[open] { animation: dialog-enter .16s ease-out; }
.session-setup {
    margin: 0;
    padding: 1.35rem;
    background: transparent;
    border: 0;
}
.session-settings-dialog-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.15rem;
}
.session-settings-dialog-header .eyebrow { margin-bottom: .25rem; }
.session-settings-dialog-header h2 {
    margin: 0 0 .25rem;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.8rem;
}
.session-settings-dialog-header p:last-child {
    max-width: 42rem;
    margin: 0;
    color: var(--muted);
    font-size: .9rem;
}
.dialog-close-button {
    display: inline-grid;
    flex: 0 0 auto;
    width: 2.4rem;
    height: 2.4rem;
    place-items: center;
    padding: 0;
    color: var(--muted);
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: .7rem;
    font: inherit;
    font-size: 1.35rem;
    line-height: 1;
    cursor: pointer;
}
.dialog-close-button:hover { color: var(--accent-dark); }
.dialog-close-button:focus-visible {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .13);
    outline: none;
}
.session-setup fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
.session-setup legend { margin-bottom: .55rem; color: var(--muted); font-size: .78rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
.review-modes { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .65rem; margin-bottom: 1rem; }
.review-mode { display: grid; gap: .15rem; min-height: 4.5rem; align-content: center; padding: .75rem .9rem; color: var(--ink); background: rgba(255,255,255,.55); border: 1px solid var(--line); border-radius: .9rem; cursor: pointer; text-decoration: none; }
.review-mode:hover { background: var(--surface); border-color: rgba(var(--accent-rgb), .35); }
.review-mode:has(input:checked) { color: var(--accent-dark); background: var(--accent-soft); border-color: rgba(var(--accent-rgb), .35); box-shadow: 0 0 0 2px rgba(var(--accent-rgb), .06); }
.review-mode:has(input:focus-visible) { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .13); }
.review-mode strong { font-size: .95rem; }
.review-mode span { color: var(--muted); font-size: .78rem; }
.review-mode:has(input:checked) span { color: var(--accent-dark); }
.difficulty-fieldset { margin-bottom: 1rem !important; }
.difficulty-options {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: .55rem;
}
.difficulty-options label { cursor: pointer; }
.difficulty-options input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}
.difficulty-options span {
    display: grid;
    min-height: 3.6rem;
    align-content: center;
    gap: .05rem;
    padding: .55rem .75rem;
    color: var(--muted);
    background: rgba(255,255,255,.55);
    border: 1px solid var(--line);
    border-radius: .75rem;
    font-size: .74rem;
}
.difficulty-options strong { color: var(--ink); font-size: .86rem; }
.difficulty-options label:hover span { background: var(--surface); }
.difficulty-options input:checked + span {
    color: var(--accent-dark);
    background: var(--accent-soft);
    border-color: rgba(var(--accent-rgb), .35);
}
.difficulty-options input:checked + span strong { color: var(--accent-dark); }
.difficulty-options input:focus-visible + span {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .13);
}
.pool-size-row { display: flex; align-items: end; gap: .75rem; }
.pool-size-fieldset { flex: 1 1 auto; }
.pool-size-options { display: flex; flex-wrap: wrap; gap: .4rem; }
.pool-size-options label { cursor: pointer; }
.pool-size-options input { position: absolute; opacity: 0; pointer-events: none; }
.pool-size-options span { display: inline-flex; min-height: 2.75rem; align-items: center; justify-content: center; padding: .5rem .8rem; background: var(--surface); border: 1px solid var(--line); border-radius: .7rem; font-size: .88rem; font-weight: 600; }
.pool-size-options label:hover span { background: var(--paper); }
.pool-size-options input:checked + span { color: var(--accent-dark); background: var(--accent-soft); border-color: rgba(var(--accent-rgb), .35); }
.pool-size-options input:focus-visible + span { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .13); }
.custom-pool-size { display: grid; flex: 0 0 8rem; gap: .25rem; }
.custom-pool-size[hidden] { display: none; }
.custom-pool-size label { color: var(--muted); font-size: .75rem; font-weight: 600; }
.custom-pool-size input { width: 100%; min-height: 2.75rem; padding: .5rem .65rem; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: .7rem; }
.custom-pool-size input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .13); outline: none; }
.session-setup-note { margin: .75rem 0 0; color: var(--muted); font-size: .8rem; }
.session-settings-dialog-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
}
.session-settings-preview { display: grid; gap: .15rem; min-width: 0; }
.session-settings-preview small {
    color: var(--accent);
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
}
.session-settings-preview strong {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem;
    font-size: .95rem;
}
.session-settings-dialog-actions {
    display: flex;
    flex: 0 0 auto;
    gap: .6rem;
}
body.session-settings-open { overflow: hidden; }
.review-workspace {
    width: 100%;
    min-width: 0;
}
.review-main { width: 100%; min-width: 0; }
.review-validation { margin-bottom: 1rem; }
.exercise-card { min-width: 0; }
.session-progress { margin-bottom: 1rem; padding: .75rem 1rem; background: rgba(255,255,255,.55); border: 1px solid var(--line); border-radius: .9rem; }
.session-progress div { display: flex; justify-content: space-between; gap: 1rem; margin-bottom: .5rem; font-size: .85rem; }
.session-progress span { color: var(--muted); }
.session-progress progress { display: block; width: 100%; height: .45rem; overflow: hidden; accent-color: var(--accent); border: 0; border-radius: 999px; }
.session-progress progress::-webkit-progress-bar { background: var(--line); border-radius: 999px; }
.session-progress progress::-webkit-progress-value { background: var(--accent); border-radius: 999px; }
.session-complete-layout {
    width: 100%;
}
.session-results { padding: 1.5rem; }
.session-results h2 { margin-bottom: 1.25rem; font-family: Georgia, serif; font-size: 2rem; }
.session-statistics { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: .6rem; }
.session-statistics div { display: grid; gap: .15rem; padding: .75rem .5rem; background: var(--paper); border-radius: .75rem; text-align: center; }
.session-statistics strong { font-size: 1.4rem; }
.session-statistics span { color: var(--muted); font-size: .75rem; }
.session-statistics .stat-correct strong { color: var(--success); }
.session-statistics .stat-incorrect strong { color: var(--accent-dark); }
.session-results-note { margin: .75rem 0 0; color: var(--muted); font-size: .8rem; }
.type-statistics {
    min-width: 0;
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
}
.type-statistics h3 { margin: 0 0 .65rem; font-size: .95rem; }
.type-statistics-row { display: grid; grid-template-columns: minmax(7rem, 1fr) repeat(3, auto); gap: .75rem; padding: .45rem 0; border-bottom: 1px solid rgba(222, 217, 205, .65); font-size: .82rem; }
.type-statistics-row:last-child { border-bottom: 0; }
.type-statistics-row span { color: var(--muted); }
.review-side-rail {
    position: sticky;
    top: 1rem;
    height: calc(100vh - 2rem);
    min-height: 32rem;
    align-self: start;
    margin-top: 1rem;
}
.session-mistakes-panel {
    display: flex;
    height: 100%;
    min-width: 0;
    min-height: 0;
    flex-direction: column;
    padding: 1.35rem;
}
.session-mistakes-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: .65rem;
}
.session-mistakes-heading h3 {
    margin: 0;
    font-family: Georgia, serif;
    font-size: 1.35rem;
}
.session-mistakes-heading > span {
    display: inline-grid;
    min-width: 1.8rem;
    height: 1.8rem;
    place-items: center;
    color: var(--accent-dark);
    background: var(--accent-soft);
    border-radius: 999px;
    font-size: .78rem;
    font-weight: 700;
}
.session-mistake-list {
    display: grid;
    min-height: 0;
    align-content: start;
    flex: 1;
    gap: .5rem;
    overflow-y: auto;
    padding-right: .25rem;
}
.session-review-empty {
    position: relative;
    display: grid;
    min-height: 0;
    flex: 1;
    place-content: center;
    justify-items: center;
    overflow: hidden;
    padding: 1.5rem .5rem;
    color: var(--muted);
    text-align: center;
}
.session-review-empty-mark {
    display: grid;
    width: 3rem;
    height: 3rem;
    place-items: center;
    margin-bottom: .9rem;
    color: var(--accent-dark);
    background: var(--accent-soft);
    border-radius: 999px;
    font-family: Georgia, "Yu Mincho", serif;
    font-size: 1.2rem;
    font-weight: 700;
}
.session-review-watermark {
    position: absolute;
    inset: 1rem;
    display: grid;
    place-items: center;
    color: rgba(109, 104, 94, .10);
    font-family: Georgia, "Yu Mincho", "Noto Serif JP", serif;
    font-size: clamp(6.5rem, 18vh, 12rem);
    font-weight: 700;
    line-height: 1;
    letter-spacing: .08em;
    writing-mode: vertical-rl;
    text-orientation: upright;
    user-select: none;
}
.session-review-empty-message {
    position: relative;
    z-index: 1;
    display: grid;
    max-width: 18rem;
    justify-items: center;
    padding: 1rem 1.25rem;
    background: transparent;
}
.session-review-empty strong { color: var(--ink); }
.session-review-empty p {
    max-width: 17rem;
    margin: .4rem 0 0;
    font-size: .82rem;
}
.session-review-success .session-review-empty-mark {
    color: var(--success);
    background: var(--success-soft);
}
.session-mistake {
    background: var(--paper);
    border: 1px solid transparent;
    border-radius: .7rem;
}
.session-mistake[open] {
    background: var(--surface);
    border-color: var(--line);
}
.session-mistake summary {
    display: flex;
    min-height: 3rem;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .55rem .75rem;
    cursor: pointer;
    list-style: none;
}
.session-mistake summary::-webkit-details-marker { display: none; }
.session-mistake summary > strong {
    font-family: Georgia, "Yu Mincho", serif;
    font-size: 1.15rem;
}
.mistake-action {
    flex: 0 0 auto;
    color: var(--accent-dark);
    font-size: .78rem;
    font-weight: 600;
}
.session-mistake-details {
    padding: .65rem .75rem .75rem;
    border-top: 1px solid var(--line);
}
.session-mistake-answer {
    display: grid;
    gap: .1rem;
    color: var(--muted);
    font-size: .85rem;
}
.session-mistake-answer + .session-mistake-answer {
    margin-top: .75rem;
    padding-top: .75rem;
    border-top: 1px solid var(--line);
}
.session-mistake-label { color: var(--ink); }
.session-mistake-answer p { margin: .2rem 0 0; }
.session-mistake-details strong { color: var(--ink); }
.answer-reference span { color: var(--muted); }
.answer-reference strong { color: var(--ink); font-size: 1.1rem; }
.answer-comparison { margin-top: .85rem; padding: .75rem; color: var(--ink); background: rgba(255,255,255,.62); border-radius: .7rem; }
.comparison-title { margin: 0 0 .65rem !important; color: var(--muted); font-size: .85rem; font-weight: 600; }
.comparison-row { display: grid; grid-template-columns: 7.5rem minmax(0, 1fr); align-items: center; gap: .65rem; margin-top: .45rem; }
.comparison-label { color: var(--muted); font-size: .78rem; font-weight: 700; }
.comparison-characters { display: flex; flex-wrap: wrap; gap: .25rem; }
.comparison-characters > span { display: inline-grid; width: 2rem; height: 2rem; place-items: center; border: 1px solid transparent; border-radius: .45rem; font-size: 1.1rem; font-weight: 700; }
.comparison-characters .is-match { color: var(--ink); background: var(--paper); border-color: var(--line); }
.comparison-characters .is-submitted-error { color: var(--accent-dark); background: var(--accent-soft); border-color: rgba(var(--accent-rgb), .22); }
.comparison-characters .is-expected { color: var(--success); background: var(--success-soft); border-color: rgba(40, 122, 82, .22); }
.comparison-explanations { display: flex; flex-wrap: wrap; gap: .4rem; margin: .7rem 0 0; padding: 0; list-style: none; }
.comparison-explanations li { padding: .25rem .5rem; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 999px; font-size: .78rem; font-weight: 700; }

html[data-design-shape="square"] body * {
    border-radius: 0 !important;
}
@media (min-width: 1400px) {
    html { font-size: 18px; }
}

@media (max-width: 1280px) {
    .app-shell,
    .app-shell-review,
    .app-shell-profile {
        grid-template-columns: 1fr;
        gap: 0;
        width: min(100% - 2rem, 1000px);
    }
    .app-sidebar {
        position: static;
        display: grid;
        grid-template-columns: auto auto minmax(0, 1fr) auto;
        height: auto;
        min-height: 0;
        align-items: center;
        gap: 1.5rem;
        margin-top: 1rem;
        padding: .85rem 1rem;
    }
.sidebar-design-control {
    display: flex;
    flex-wrap: wrap;
        align-items: flex-end;
        gap: .4rem;
        margin-top: 0;
        padding-top: 0;
        border-top: 0;
    }
    .sidebar-design-label { display: none; }
    .sidebar-option-label,
    .sidebar-option-field > span { display: none; }
    .sidebar-option-field select { width: auto; max-width: 7rem; }
    .sidebar-nav {
        display: flex;
        justify-content: flex-end;
        margin: 0;
    }
    .sidebar-label { display: none; }
    .sidebar-nav a {
        display: block;
        padding: .55rem .75rem;
    }
    .sidebar-nav a span { display: none; }
    .sidebar-profile {
        margin: 0;
        padding: .45rem .6rem;
    }
    .sidebar-profile-copy > span,
    .sidebar-profile-arrow { display: none; }
    .page { margin-top: 1.5rem; }
    .page-review { margin-bottom: 1rem; }
    .review-side-rail {
        position: static;
        height: auto;
        min-height: 0;
        margin-top: 0;
        margin-bottom: 5rem;
    }
    .profile-side-rail {
        position: static;
        height: auto;
        max-height: none;
        min-height: 0;
        margin: 0 0 5rem;
    }
    .learning-insights {
        max-height: none;
        min-height: 24rem;
        overflow-y: visible;
    }
    .insight-list { max-height: none; }
    .session-mistakes-panel { min-height: 24rem; }
    .session-mistake-list { max-height: min(32rem, 60vh); }
}

@media (max-width: 900px) {
    .word-form-classification-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .counter-browser { grid-template-columns: 1fr; }
    .counter-index {
        position: static;
        display: flex;
        max-height: none;
        overflow-x: auto;
    }
    .counter-index a { min-width: 9rem; }
    .counter-form-labels { display: none; }
    .counter-form-row { grid-template-columns: 5rem 1fr 1fr; }
    .counter-form-row input:nth-of-type(4) { grid-column: 2 / -1; }
    .review-modes { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .profile-dashboard-grid { grid-template-columns: 1fr; }
    .word-version-grid { grid-template-columns: 1fr; }
    .word-change-card > summary {
        grid-template-columns: minmax(0, 1fr) auto;
    }
    .word-change-summary-meta { grid-column: 1; }
    .word-change-toggle { grid-column: 2; grid-row: 2; }
    .session-mistake-list {
        max-height: min(24rem, 50vh);
    }
}

@media (max-width: 650px) {
    .word-form-classification-grid,
    .word-form-details-grid { grid-template-columns: 1fr; }
    .counter-form-heading,
    .counter-card-heading { align-items: stretch; flex-direction: column; }
    .counter-form-row { grid-template-columns: 4.5rem minmax(0, 1fr); }
    .counter-form-row input:nth-of-type(n + 2) { grid-column: 2; }
    .counter-form-row .remove-counter-form { grid-column: 2; justify-self: start; }
    .counter-card-actions { justify-content: space-between; }
    .app-shell { width: calc(100% - 2rem); }
    .app-sidebar {
        grid-template-columns: auto minmax(0, 1fr);
        gap: .75rem;
    }
    .sidebar-profile {
        justify-self: end;
    }
    .sidebar-nav { gap: .15rem; }
    .sidebar-nav {
        grid-column: 1 / -1;
        justify-content: stretch;
    }
    .sidebar-design-control {
        grid-column: 1 / -1;
        width: 100%;
        justify-content: flex-end;
    }
    .sidebar-nav a { text-align: center; }
    .sidebar-nav a { padding-inline: .55rem; }
    .profile-overview-heading { align-items: flex-start; }
    .profile-page-heading,
    .profile-switcher-heading {
        align-items: flex-start;
        flex-direction: column;
    }
    .profile-page-heading > p { text-align: left; }
    .profile-options { grid-template-columns: 1fr; }
    .profile-option { grid-template-columns: auto minmax(0, 1fr); }
    .profile-option form,
    .profile-current { grid-column: 2; justify-self: start; }
    .profile-dashboard-heading,
    .profile-data-controls,
    .word-change-review-heading,
    .demo-drafts-heading { align-items: stretch; flex-direction: column; }
    .word-change-count,
    .demo-drafts-heading > span { align-self: flex-start; }
    .word-change-card > summary { grid-template-columns: 1fr; }
    .word-change-summary-meta,
    .word-change-toggle { grid-column: 1; grid-row: auto; }
    .demo-draft-row { align-items: flex-start; flex-direction: column; }
    .demo-draft-change-row { grid-template-columns: 1fr; align-items: flex-start; }
    .demo-draft-notice { align-items: flex-start; flex-direction: column; }
    .word-change-actions { align-items: stretch; flex-direction: column; }
    .word-change-actions .button { width: 100%; }
    .pagination { align-items: stretch; flex-direction: column; }
    .profile-mode-stat { grid-template-columns: 1fr; gap: .15rem; }
    .recent-session { grid-template-columns: minmax(0, 1fr) auto; }
    .recent-session > strong { grid-column: 2; grid-row: 1; }
    .page { margin-top: 1.5rem; }
    .list-toolbar { align-items: stretch; flex-direction: column; }
    .list-toolbar .button { width: 100%; }
    .bulk-toolbar { align-items: stretch; flex-direction: column; }
    .word-filters { align-items: stretch; flex-direction: column; }
    .word-filters label { width: 100%; }
    .bulk-selection-controls { justify-content: space-between; }
    .bulk-update-controls { align-items: stretch; flex-direction: column; }
    .bulk-update-controls .button { width: 100%; }
    .confirmation-dialog-actions { flex-direction: column-reverse; }
    .confirmation-dialog-actions .button { width: 100%; }
    .word-table thead { display: none; }
    .word-table, .word-table tbody, .word-table tr, .word-table td { display: block; }
    .word-table tr { padding: 1rem; border-bottom: 1px solid var(--line); }
    .word-table td { padding: .2rem 0; border: 0; }
    .word-table td::before { content: attr(data-label); display: inline-block; min-width: 6.5rem; color: var(--muted); font-size: .78rem; }
    .word-table td.actions { justify-content: flex-start; margin-top: .8rem; }
    .word-table td.actions::before { display: none; }
    .word-table td.selection-cell { margin-bottom: .55rem; text-align: left !important; }
    .word-table td.selection-cell::before { display: none; }
    .answer-details { grid-template-columns: 1fr; }
    .answer-details dd { margin-bottom: .6rem; }
    .answer-entry { grid-template-columns: 2.75rem minmax(0, 1fr); }
    .answer-type-symbol {
        width: 2.75rem;
        height: 2.75rem;
        font-size: 1.15rem;
    }
    .review-modes { grid-template-columns: 1fr; }
    .difficulty-options { grid-template-columns: 1fr; }
    .session-settings-summary { align-items: stretch; flex-direction: column; }
    .session-settings-current { width: 100%; }
    .session-settings-values { width: 100%; grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .session-settings-action { align-self: flex-end; }
    .pool-size-row { align-items: stretch; flex-direction: column; }
    .custom-pool-size { width: 100%; flex-basis: auto; }
    .session-settings-dialog-footer { align-items: stretch; flex-direction: column; }
    .session-settings-dialog-actions { flex-direction: column-reverse; }
    .session-settings-dialog-actions .button { width: 100%; }
    .session-statistics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .profile-statistics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .session-attempt summary {
        grid-template-columns: auto minmax(0, 1fr) auto;
    }
    .session-attempt summary > span:nth-last-child(2) { display: none; }
    .session-attempt-answer { padding-left: 1rem; }
    .session-attempt-answer > div { grid-template-columns: 1fr; gap: .1rem; }
    .session-results h2 { font-size: 1.75rem; }
    .type-statistics-row { grid-template-columns: 1fr; gap: .15rem; }
    .comparison-row { grid-template-columns: 1fr; gap: .25rem; }
    .exercise-actions { grid-template-columns: 1fr; }
}