/* ============================================================
   Word Adventure Lab: playful clay + map layout
   ============================================================ */

:root {
    color-scheme: light;
    --font-display: 'Baloo 2', 'Trebuchet MS', system-ui, sans-serif;
    --font-body: 'Nunito', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --sunny: #facc15;
    --berry: #e11d48;
    --sky: #38bdf8;
    --leaf: #22c55e;
    --ink: #1e1b4b;
    --line-soft: rgba(30, 27, 75, 0.14);
    --clay-shadow: 0 12px 0 rgba(30, 27, 75, 0.14), 0 22px 34px rgba(30, 27, 75, 0.12);
    --clay-shadow-small: 0 7px 0 rgba(30, 27, 75, 0.14), 0 14px 24px rgba(30, 27, 75, 0.12);
    --hard-shadow: 5px 5px 0 var(--ink);
    --radius: 20px;
    --radius-sm: 14px;
    --transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    --shadow: var(--clay-shadow-small);
    --shadow-hover: var(--clay-shadow);
}

:root:not([data-theme]) {
    --primary-color: #4f46e5;
    --primary-dark: #312e81;
    --secondary-color: #0f9f8f;
    --accent-color: #f97316;
    --text-color: #1e1b4b;
    --text-light: #4b4b75;
    --text-lighter: #73739a;
    --bg-color: #fff7d6;
    --card-bg: #ffffff;
    --section-bg: #eef2ff;
    --border-color: #1e1b4b;
}

html {
    background: #fff7d6;
}

body {
    min-width: 320px;
    font-family: var(--font-body);
    color: var(--ink);
    letter-spacing: 0;
    background:
        radial-gradient(circle at 12% 10%, rgba(56, 189, 248, 0.34), transparent 18rem),
        radial-gradient(circle at 92% 16%, rgba(250, 204, 21, 0.45), transparent 18rem),
        radial-gradient(circle at 74% 86%, rgba(244, 114, 182, 0.25), transparent 20rem),
        linear-gradient(135deg, #fff7d6 0%, #eef2ff 58%, #dcfce7 100%);
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background-image: radial-gradient(circle, rgba(30, 27, 75, 0.09) 0 2px, transparent 2.5px);
    background-size: 54px 54px;
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.42), transparent 62%);
}

.skip-link {
    position: fixed;
    top: 14px;
    left: 14px;
    z-index: 3000;
    transform: translateY(-160%);
    padding: 0.75rem 1rem;
    border: 3px solid var(--ink);
    border-radius: var(--radius-sm);
    background: #fff;
    color: var(--ink);
    box-shadow: var(--hard-shadow);
    font-weight: 900;
    text-decoration: none;
    transition: transform 0.18s ease;
}

.skip-link:focus {
    transform: translateY(0);
}

.word-adventure-shell {
    width: min(100%, 1480px);
    max-width: none;
    min-height: 100vh;
    display: grid;
    grid-template-columns: minmax(290px, 360px) minmax(0, 1fr);
    grid-template-rows: auto auto;
    gap: clamp(16px, 2.4vw, 30px);
    padding: clamp(12px, 2vw, 26px);
}

.word-launcher {
    grid-column: 1;
    position: sticky;
    top: clamp(12px, 2vw, 26px);
    align-self: start;
    min-height: calc(100vh - clamp(24px, 4vw, 52px));
    margin: 0;
    overflow: visible;
    border: 4px solid var(--ink);
    border-radius: 28px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.72)),
        #fef08a;
    box-shadow: 10px 10px 0 var(--ink);
    color: var(--ink);
    padding: clamp(18px, 2.6vw, 28px);
}

.word-launcher::before {
    content: '';
    position: absolute;
    inset: auto -60px -58px auto;
    width: 210px;
    aspect-ratio: 1;
    border: 4px solid var(--ink);
    border-radius: 45% 55% 50% 50%;
    background: #86efac;
    transform: rotate(-13deg);
    pointer-events: none;
}

.word-launcher::after {
    content: '';
    position: absolute;
    left: -34px;
    bottom: 12%;
    width: 86px;
    aspect-ratio: 1;
    border: 4px solid var(--ink);
    border-radius: 26px;
    background: #f9a8d4;
    transform: rotate(18deg);
    pointer-events: none;
}

.header-content {
    position: relative;
    z-index: 1;
    max-width: none;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: space-between;
    gap: 1.2rem;
    padding: 0;
}

.launcher-topline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.launcher-orbit {
    position: absolute;
    inset: 0;
    z-index: -1;
    pointer-events: none;
}

.orbit-letter,
.orbit-shape {
    position: absolute;
    display: grid;
    place-items: center;
    border: 3px solid var(--ink);
    box-shadow: 4px 4px 0 var(--ink);
}

.orbit-letter {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    font-family: var(--font-display);
    font-size: 1.7rem;
    font-weight: 900;
}

.orbit-letter-a {
    top: 5%;
    right: 2%;
    background: #bfdbfe;
    transform: rotate(10deg);
}

.orbit-letter-b {
    display: none;
    top: 40%;
    right: -4%;
    background: #fed7aa;
    transform: rotate(-14deg);
}

.orbit-letter-c {
    display: none;
    bottom: 12%;
    left: 7%;
    background: #f0abfc;
    transform: rotate(8deg);
}

.orbit-shape-star {
    width: 42px;
    height: 42px;
    right: 20%;
    bottom: 28%;
    background: var(--sunny);
    clip-path: polygon(50% 0, 62% 33%, 98% 35%, 68% 55%, 79% 91%, 50% 70%, 21% 91%, 32% 55%, 2% 35%, 38% 33%);
}

.orbit-shape-moon {
    display: none;
    width: 34px;
    height: 34px;
    left: 4%;
    top: 22%;
    border-radius: 50%;
    background: var(--sky);
}

.header-brand {
    width: fit-content;
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.5rem 0.75rem;
    border: 3px solid var(--ink);
    border-radius: 999px;
    background: #fff;
    box-shadow: 4px 4px 0 var(--ink);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.header-brand i {
    color: var(--primary-color);
}

.style-mode-toggle {
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 0.8rem;
    border: 3px solid var(--ink);
    border-radius: 999px;
    background: #fff;
    color: var(--ink);
    box-shadow: 3px 3px 0 var(--ink);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 900;
    line-height: 1;
}

.style-mode-toggle:hover,
.style-mode-toggle:focus-visible {
    background: #facc15;
    transform: translate(-1px, -1px);
    box-shadow: 5px 5px 0 var(--ink);
}

.style-mode-toggle::after {
    content: '';
    width: 9px;
    height: 9px;
    flex: 0 0 auto;
    border-radius: 999px;
    background: #22c55e;
    box-shadow: 0 0 0 2px currentColor;
}

.header-title {
    margin: 0;
    color: var(--ink);
    font-family: var(--font-display);
    font-size: clamp(3rem, 4.8vw, 5.2rem);
    font-weight: 900;
    line-height: 0.86;
    letter-spacing: 0;
    text-align: left;
    text-wrap: balance;
}

.launcher-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
}

.launcher-badges span {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.48rem 0.7rem;
    border: 3px solid var(--ink);
    border-radius: 999px;
    background: #fff;
    box-shadow: 3px 3px 0 var(--ink);
    font-weight: 900;
    font-size: 0.82rem;
}

.search-container {
    position: relative;
    z-index: 6;
    width: 100%;
    max-width: none;
    margin: 0;
}

.search-container::before,
.search-container::after {
    display: none;
}

.search-box {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 0.65rem;
    align-items: center;
    min-height: 0;
    padding: 0.75rem;
    border: 4px solid var(--ink);
    border-radius: 24px;
    background: #fff;
    box-shadow: var(--hard-shadow);
}

.search-box:focus-within {
    transform: translate(-2px, -2px);
    box-shadow: 8px 8px 0 var(--ink);
}

.search-icon {
    width: 48px;
    height: 48px;
    padding: 0;
    position: relative;
    display: block;
    align-self: center;
    justify-self: center;
    border: 3px solid var(--ink);
    border-radius: 16px;
    background: #dbeafe;
    color: var(--primary-dark);
    font-size: 1.1rem;
    line-height: 1;
}

.search-icon::before {
    position: absolute;
    top: calc(50% + 1px);
    left: 50%;
    transform: translate(-50%, -50%);
    display: block;
    line-height: 1;
}

#searchInput {
    min-width: 0;
    color: var(--ink);
    font-size: 1rem;
    font-weight: 900;
}

#searchInput::placeholder {
    color: #5f5c91;
    font-weight: 800;
}

.search-btn {
    grid-column: 1 / -1;
    min-height: 52px;
    justify-content: center;
    border: 4px solid var(--ink);
    border-radius: 18px;
    background: #22c55e;
    color: var(--ink);
    box-shadow: 5px 5px 0 var(--ink);
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 900;
}

.search-btn:hover,
.search-btn:focus-visible {
    background: #86efac;
    transform: translate(-2px, -2px);
    box-shadow: 8px 8px 0 var(--ink);
}

.search-hint {
    justify-content: flex-start;
    align-items: flex-start;
    margin-top: 1rem;
    color: var(--ink);
    font-weight: 900;
}

.search-hint-label {
    width: 100%;
    color: var(--ink);
}

.search-hint-chips {
    justify-content: flex-start;
}

.search-hint-chip,
.empty-feature-pill,
.word-pos-badge,
.sense-pos,
.part-of-speech,
.register-badge,
.domain-badge,
.tone-badge,
.word-frequency,
.video-resource-badge,
.wcd-type-pill,
.wcd-diff-pill,
.wcd-b-type-pill,
.wcd-b-diff-pill,
.wcd-b-attr-pill,
.wcd-attr-pill {
    border: 3px solid var(--ink);
    border-radius: 999px;
    background: #fff;
    color: var(--ink);
    box-shadow: 3px 3px 0 var(--ink);
    font-weight: 900;
}

.search-hint-chip:nth-child(1) { background: #bfdbfe; }
.search-hint-chip:nth-child(2) { background: #fed7aa; }
.search-hint-chip:nth-child(3) { background: #bbf7d0; }
.search-hint-chip:nth-child(4) { background: #fbcfe8; }

.search-hint-chip:hover {
    transform: translate(-1px, -1px) rotate(-1deg);
    box-shadow: 5px 5px 0 var(--ink);
}

.word-map {
    grid-column: 2;
    position: relative;
    min-width: 0;
}

.map-ribbon {
    display: none;
    position: absolute;
    top: 18px;
    right: 22px;
    z-index: 1;
    width: 160px;
    height: 46px;
    pointer-events: none;
}

.map-dot {
    position: absolute;
    border: 3px solid var(--ink);
    box-shadow: 3px 3px 0 var(--ink);
}

.map-dot-one {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #facc15;
    left: 0;
    top: 6px;
}

.map-dot-two {
    width: 56px;
    height: 28px;
    border-radius: 999px;
    background: #38bdf8;
    left: 45px;
    top: 0;
    transform: rotate(-8deg);
}

.map-dot-three {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    background: #fb7185;
    right: 0;
    top: 7px;
    transform: rotate(14deg);
}

.results-container,
.empty-state,
.loading-container {
    width: 100%;
    max-width: none;
    margin: 0;
}

.results-container {
    display: grid;
    grid-template-columns: minmax(160px, 210px) minmax(0, 1fr);
    grid-template-areas:
        "word word"
        "tabs content";
    gap: clamp(14px, 2vw, 20px);
    overflow: visible;
    border: 4px solid var(--ink);
    border-radius: 30px;
    background: rgba(255, 255, 255, 0.86);
    box-shadow: 10px 10px 0 var(--ink);
    padding: clamp(12px, 1.6vw, 18px);
    backdrop-filter: none;
}

.word-header {
    grid-area: word;
    position: relative;
    overflow: hidden;
    min-height: 190px;
    padding: clamp(1.1rem, 2.2vw, 1.7rem);
    border: 4px solid var(--ink);
    border-radius: 24px;
    background:
        radial-gradient(circle at 90% 16%, rgba(250, 204, 21, 0.88), transparent 8rem),
        linear-gradient(135deg, #c7d2fe 0%, #bfdbfe 48%, #bbf7d0 100%);
    box-shadow: var(--hard-shadow);
}

.word-header::before {
    content: '';
    position: absolute;
    inset: auto 32px 26px auto;
    width: min(230px, 28vw);
    aspect-ratio: 1;
    border: 4px solid var(--ink);
    border-radius: 42% 58% 48% 52%;
    background: rgba(255, 255, 255, 0.42);
    transform: rotate(-10deg);
}

.word-header::after {
    content: '';
    position: absolute;
    left: -26px;
    top: 24px;
    width: 94px;
    height: 38px;
    border: 4px solid var(--ink);
    border-radius: 999px;
    background: #f9a8d4;
    transform: rotate(-15deg);
}

.word-header-main,
.word-title-row,
.word-meta-inline {
    position: relative;
    z-index: 1;
}

.word-header-main {
    display: grid;
    gap: 1rem;
    min-height: 100%;
    align-content: end;
}

.word-title-row {
    align-items: flex-end;
    gap: 0.8rem;
}

.word-headword {
    margin: 0;
    color: var(--ink);
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 7rem);
    font-weight: 900;
    line-height: 0.78;
    overflow-wrap: anywhere;
    text-shadow: 3px 3px 0 rgba(255, 255, 255, 0.78);
}

.word-meta-inline {
    align-items: center;
    gap: 0.8rem;
}

.audio-play-btn {
    width: 46px;
    height: 46px;
    border: 4px solid var(--ink);
    border-radius: 16px;
    background: #fff;
    color: var(--primary-dark);
    box-shadow: 4px 4px 0 var(--ink);
}

.audio-play-btn:hover {
    background: #facc15;
    color: var(--ink);
    transform: translate(-1px, -1px);
}

.sticky-tabs {
    grid-area: tabs;
    position: sticky;
    top: clamp(12px, 2vw, 26px);
    align-self: start;
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
    overflow: visible;
}

.tab-list {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    width: 100%;
}

.tab-link {
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.7rem 0.8rem;
    border: 4px solid var(--ink);
    border-radius: 18px;
    background: #fff;
    color: var(--ink);
    box-shadow: 4px 4px 0 var(--ink);
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 900;
}

.tab-link:hover,
.tab-link.active {
    background: #facc15;
    color: var(--ink);
    transform: translate(-1px, -1px);
    box-shadow: 6px 6px 0 var(--ink);
}

.content-single-column {
    grid-area: content;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
    gap: clamp(14px, 1.8vw, 20px);
    padding: 0;
}

.definitions-section,
.usage-section,
.video-resources-section {
    grid-column: 1 / -1;
}

.accordion-section {
    margin: 0;
    overflow: hidden;
    border: 4px solid var(--ink);
    border-radius: 24px;
    background: #fff;
    box-shadow: var(--hard-shadow);
    content-visibility: auto;
}

.accordion-section[open] {
    box-shadow: 8px 8px 0 var(--ink);
}

.accordion-header {
    min-height: 70px;
    padding: 0.95rem 1.05rem;
    background: #fff;
}

.accordion-section:nth-child(4n + 1) .accordion-header { background: #dbeafe; }
.accordion-section:nth-child(4n + 2) .accordion-header { background: #fed7aa; }
.accordion-section:nth-child(4n + 3) .accordion-header { background: #dcfce7; }
.accordion-section:nth-child(4n + 4) .accordion-header { background: #fbcfe8; }

.accordion-header h3 {
    gap: 0.7rem;
    color: var(--ink);
    font-family: var(--font-display);
    font-size: clamp(1.12rem, 1.5vw, 1.35rem);
    font-weight: 900;
}

.accordion-header h3 i,
.video-resource-title i,
.conversation-header i,
.synonym-group-header i,
.wcd-field-icon,
.wcd-b-note-icon,
.wcd-b-quick-rule-icon,
.wcd-b-key-diff-icon,
.wcd-b-quote-icon,
.feature-icon {
    width: 38px;
    height: 38px;
    flex: 0 0 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 3px solid var(--ink);
    border-radius: 14px;
    background: #fff;
    color: var(--primary-dark);
    box-shadow: 3px 3px 0 var(--ink);
}

.feature-icon,
.wcd-b-quote-icon {
    position: relative;
    display: block;
}

.feature-icon::before,
.wcd-b-quote-icon::before {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1em;
    transform: translate(-50%, -50%);
    display: block;
    line-height: 1;
    text-align: center;
}

.accordion-icon {
    color: var(--ink);
}

.accordion-content {
    padding: clamp(1rem, 2vw, 1.35rem);
    border-top: 4px solid var(--ink);
    background: #fffef4;
}

.sense-item-container,
.video-resource-group,
.regional-section,
.region-card,
.regional-item,
.confusion-section,
.confusion-item,
.synonym-group,
.usage-notes,
.modern-relevance-feature,
.wcd-word-card,
.wcd-b-card,
.wcd-b-meta-panel,
.wcd-b-quick-rule,
.wcd-b-key-diff,
.wcd-b-insight-panel,
.wcd-b-card-example,
.wcd-b-card-note,
.conversation-scenario,
.conversation-dialogue,
.conversation-explanation,
.entry-tab,
.entry-dropdown,
.example-item,
.sense-examples .example-item,
.phrase-chip-wrapper,
.ai-video-status,
.bilibili-video-card,
.empty-state-feature,
.history-item {
    border: 3px solid var(--ink);
    border-radius: 18px;
    background: #fff;
    box-shadow: 4px 4px 0 var(--ink);
}

.sense-item-container {
    position: relative;
    padding: clamp(1rem, 2vw, 1.35rem);
    padding-left: clamp(2rem, 3.2vw, 2.75rem);
}

.sense-item-container::before {
    content: '';
    position: absolute;
    inset: 1rem auto 1rem 0.95rem;
    width: 6px;
    border: 0;
    border-radius: 999px;
    background: linear-gradient(var(--secondary-color), var(--accent-color));
    opacity: 0.58;
}

.sense-definition {
    color: var(--ink);
    font-size: clamp(1.02rem, 1.35vw, 1.18rem);
    font-weight: 900;
    line-height: 1.5;
}

.usage-context-enhanced,
.usage-context-enhanced p,
.usage-context-enhanced div,
.usage-context-enhanced span,
.usage-context-enhanced strong,
.usage-context-enhanced h4,
.usage-context-enhanced h5,
.usage-context-enhanced li {
    color: var(--ink);
}

.modern-relevance-feature,
.modern-relevance-feature * {
    color: var(--ink);
}

.regional-section,
.confusion-section,
.regional-item,
.region-card {
    background: #fff;
}

.wcd-b-wrap {
    --wcd-lab-bg: #fff;
    --wcd-lab-panel: #fff;
    --wcd-lab-line: rgba(30, 27, 75, 0.22);
    color: var(--ink);
    background: #fff;
}

.wcd-b-wrap,
.wcd-b-wrap * {
    color: var(--ink);
}

.wcd-b-title-kicker,
.wcd-b-title-word-a,
.wcd-b-title-word-b,
.wcd-b-quick-rule-label,
.wcd-b-key-diff-label,
.wcd-b-card-kicker,
.wcd-b-note-label,
.wcd-b-card-section-label {
    color: var(--primary-dark);
}

.wcd-b-meta-panel,
.wcd-b-tags,
.wcd-b-quick-rule,
.wcd-b-key-diff,
.wcd-b-card,
.wcd-b-insight-panel,
.wcd-b-card-example,
.wcd-b-card-note,
.wcd-b-card-meaning,
.wcd-b-card-section {
    background: #fff;
    color: var(--ink);
}

.wcd-b-card-head {
    background: #eef2ff;
}

.wcd-b-card-b .wcd-b-card-head {
    background: #dcfce7;
}

.example-item,
.sense-examples .example-item,
.usage-notes {
    background: #f0f9ff;
    border-left-width: 3px;
}

.example-arrow {
    color: var(--accent-color);
    font-weight: 900;
}

.synonym-tags,
.antonym-tags,
.collocation-tags,
.phrase-chips-list,
.word-family-tags,
.confusion-chips,
.wcd-card-chips,
.wcd-b-card-chips {
    gap: 0.55rem;
}

.synonym-tag,
.antonym-tag,
.collocation-tag,
.word-tag,
.phrase-chip,
.confusion-chip,
.wcd-colloc-chip,
.wcd-domain-chip,
.wcd-b-colloc-chip,
.matched-phrase-tag {
    min-height: 36px;
    border: 3px solid var(--ink);
    border-radius: 999px;
    background: #fff;
    color: var(--ink);
    box-shadow: 3px 3px 0 var(--ink);
    font-weight: 900;
}

.synonym-tag:hover,
.word-tag:hover,
.collocation-tag:hover,
.phrase-chip:hover,
.confusion-chip:hover {
    background: #bbf7d0;
    color: var(--ink);
    transform: translate(-1px, -1px);
}

.antonym-tag:hover {
    background: #fecdd3;
    color: var(--ink);
}

.suggestions-dropdown,
.dropdown-menu,
.theme-picker-panel,
.history-panel {
    border: 4px solid var(--ink);
    border-radius: 22px;
    background: #fff;
    box-shadow: 8px 8px 0 var(--ink);
    backdrop-filter: none;
}

.suggestions-dropdown {
    padding: 0.45rem;
    max-height: var(--suggestions-max-height, clamp(300px, 52vh, 440px));
}

.suggestion-item,
.dropdown-option {
    border-radius: 14px;
}

.suggestion-item:hover,
.suggestion-item.selected,
.dropdown-option:hover,
.dropdown-option.selected {
    background: #eef2ff;
    color: var(--primary-dark);
}

.entry-dropdown-custom {
    min-height: 44px;
    border: 3px solid var(--ink);
    border-radius: 16px;
    background: #fff;
    box-shadow: 3px 3px 0 var(--ink);
}

.empty-state {
    position: relative;
    min-height: calc(100vh - clamp(24px, 4vw, 52px));
    display: grid;
    place-items: center;
    overflow: hidden;
    border: 4px solid var(--ink);
    border-radius: 30px;
    background:
        radial-gradient(circle at 18% 22%, rgba(250, 204, 21, 0.5), transparent 10rem),
        radial-gradient(circle at 80% 30%, rgba(56, 189, 248, 0.38), transparent 12rem),
        #fff;
    box-shadow: 10px 10px 0 var(--ink);
}

.empty-state::before {
    content: '';
    position: absolute;
    right: -80px;
    bottom: -90px;
    width: min(330px, 58vw);
    aspect-ratio: 1;
    border: 4px solid var(--ink);
    border-radius: 38% 62% 55% 45%;
    background: #fed7aa;
    transform: rotate(-12deg);
}

.empty-state-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
    padding: clamp(1.5rem, 4vw, 3rem);
}

.empty-state-icon-wrap,
.video-resources-empty-state .empty-state-icon,
.bilibili-empty-state-icon,
.ai-status-icon,
.ai-prompt-icon {
    border: 4px solid var(--ink);
    border-radius: 22px;
    background: #dbeafe;
    color: var(--primary-dark);
    box-shadow: var(--hard-shadow);
}

.empty-state h3 {
    color: var(--ink);
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 5.4rem);
    font-weight: 900;
    line-height: 0.9;
}

.empty-state p,
.footer,
.footer-note {
    color: var(--text-light);
    font-weight: 800;
}

.loading-container {
    min-height: 240px;
    border: 4px solid var(--ink);
    border-radius: 28px;
    background: #fff;
    box-shadow: var(--hard-shadow);
}

.spinner,
.section-loading .spinner,
.spinner-small {
    border-color: rgba(30, 27, 75, 0.16);
    border-top-color: var(--primary-color);
}

.load-more-btn,
.sense-detail-btn,
.generate-ai-video-btn,
.clear-all-history-btn,
.wcd-retry-btn,
.wcd-b-export-btn,
.ai-video-btn,
.back-to-phrases-btn {
    border: 3px solid var(--ink);
    border-radius: 16px;
    background: #22c55e;
    color: var(--ink);
    box-shadow: 4px 4px 0 var(--ink);
    font-weight: 900;
}

.load-more-btn:hover:not(:disabled),
.sense-detail-btn:hover,
.generate-ai-video-btn:hover,
.clear-all-history-btn:hover,
.wcd-retry-btn:hover,
.wcd-b-export-btn:hover,
.ai-video-btn:hover,
.back-to-phrases-btn:hover {
    background: #86efac;
    color: var(--ink);
    transform: translate(-1px, -1px);
}

.speed-dial {
    right: clamp(1rem, 2vw, 1.6rem);
    bottom: clamp(1rem, 2vw, 1.6rem);
}

.speed-dial-main-btn,
.speed-dial-child-btn {
    border: 4px solid var(--ink);
    border-radius: 20px;
    background: #fff;
    color: var(--ink);
    box-shadow: var(--hard-shadow);
}

.speed-dial-main-btn:hover,
.speed-dial-child-btn:hover {
    background: #facc15;
    color: var(--ink);
    transform: translate(-1px, -1px);
}

.speed-dial-label {
    border: 3px solid var(--ink);
    border-radius: 14px;
    background: #fff;
    color: var(--ink);
    box-shadow: 4px 4px 0 var(--ink);
}

.history-panel {
    top: 14px;
    right: -430px;
    width: min(400px, calc(100vw - 28px));
    height: calc(100vh - 28px);
}

.history-panel.active {
    right: 14px;
}

.history-panel-header {
    background: #dbeafe;
    color: var(--ink);
    border-bottom: 4px solid var(--ink);
}

.close-history-btn {
    border: 3px solid var(--ink);
    background: #fff;
    color: var(--ink);
}

.theme-swatch {
    border: 3px solid var(--ink);
    box-shadow: 3px 3px 0 var(--ink);
}

.theme-swatch:hover,
.theme-swatch.active {
    transform: translate(-1px, -1px);
    box-shadow: 5px 5px 0 var(--ink);
}

.footer {
    grid-column: 1 / -1;
    margin: 0;
    padding: 1rem 0.5rem 0.5rem;
}

img,
video,
canvas,
iframe {
    max-width: 100%;
}

button:focus-visible,
a:focus-visible,
summary:focus-visible,
input:focus-visible,
.entry-dropdown-custom:focus-visible,
.suggestion-item:focus-visible,
.theme-swatch:focus-visible {
    outline: 4px solid #facc15;
    outline-offset: 4px;
}

/* Final adventure polish: quieter canvas, clearer reading surfaces. */
html {
    background: color-mix(in srgb, var(--bg-color, #fff7d6) 86%, #fff);
}

body {
    background:
        radial-gradient(circle at 10% 8%, color-mix(in srgb, var(--primary-color) 16%, transparent), transparent 18rem),
        radial-gradient(circle at 92% 14%, color-mix(in srgb, var(--accent-color) 18%, transparent), transparent 18rem),
        linear-gradient(135deg, color-mix(in srgb, var(--bg-color, #fff7d6) 84%, #fff) 0%, color-mix(in srgb, var(--section-bg, #eef2ff) 72%, #fff) 58%, color-mix(in srgb, var(--secondary-color) 9%, #fff) 100%);
}

body::before {
    background-size: 82px 82px;
    opacity: 0.36;
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.22), transparent 54%);
}

.word-launcher::before,
.word-launcher::after,
.orbit-letter-a,
.orbit-shape-star,
.word-header::before,
.word-header::after {
    opacity: 0.42;
}

.word-launcher,
.results-container,
.word-header,
.accordion-section,
.search-box,
.empty-state,
.loading-container {
    border-width: 3px;
}

.word-launcher {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.97), rgba(255, 255, 255, 0.76)),
        color-mix(in srgb, var(--accent-color) 20%, #fff);
    box-shadow: 7px 7px 0 var(--ink), 0 22px 46px rgba(30, 27, 75, 0.1);
}

.results-container {
    background: color-mix(in srgb, var(--card-bg, #fff) 90%, transparent);
    box-shadow: 7px 7px 0 var(--ink), 0 24px 50px rgba(30, 27, 75, 0.12);
}

.word-header {
    background:
        radial-gradient(circle at 90% 16%, color-mix(in srgb, var(--accent-color) 32%, transparent), transparent 8rem),
        linear-gradient(135deg, color-mix(in srgb, var(--primary-color) 14%, #fff) 0%, #bfdbfe 48%, color-mix(in srgb, var(--secondary-color) 12%, #fff) 100%);
    box-shadow: 5px 5px 0 var(--ink);
}

.word-header::before,
.word-header::after {
    border-width: 3px;
}

.search-box {
    box-shadow: 4px 4px 0 var(--ink), 0 18px 34px rgba(30, 27, 75, 0.1);
}

.search-box:focus-within,
.search-btn:hover,
.search-btn:focus-visible {
    box-shadow: 6px 6px 0 var(--ink), 0 18px 34px rgba(30, 27, 75, 0.1);
}

.tab-link {
    border-width: 3px;
    box-shadow: 3px 3px 0 var(--ink);
}

.tab-link:hover,
.tab-link.active {
    box-shadow: 5px 5px 0 var(--ink);
}

.accordion-section {
    box-shadow: 5px 5px 0 var(--ink);
}

.accordion-section[open] {
    box-shadow: 6px 6px 0 var(--ink), 0 18px 36px rgba(30, 27, 75, 0.08);
}

.accordion-content {
    border-top-color: color-mix(in srgb, var(--primary-color) 32%, rgba(30, 27, 75, 0.24));
    background: color-mix(in srgb, var(--card-bg, #fff) 92%, #fff7d6);
}

.sense-item-container,
.video-resource-group,
.regional-section,
.region-card,
.regional-item,
.confusion-section,
.confusion-item,
.synonym-group,
.usage-notes,
.modern-relevance-feature,
.wcd-word-card,
.wcd-b-card,
.wcd-b-meta-panel,
.wcd-b-quick-rule,
.wcd-b-key-diff,
.wcd-b-insight-panel,
.wcd-b-card-example,
.wcd-b-card-note,
.conversation-scenario,
.conversation-dialogue,
.conversation-explanation,
.example-item,
.sense-examples .example-item,
.phrase-chip-wrapper,
.ai-video-status,
.bilibili-video-card,
.empty-state-feature,
.history-item {
    border: 2px solid color-mix(in srgb, var(--primary-color) 26%, rgba(30, 27, 75, 0.2));
    background: var(--card-bg, #fff);
    box-shadow: 0 12px 26px rgba(30, 27, 75, 0.08);
}

.sense-item-container {
    padding-left: clamp(2.25rem, 3.4vw, 3rem);
}

.sense-item-container::before {
    inset: 1rem auto 1rem 0.82rem;
    width: 4px;
    background: linear-gradient(var(--secondary-color), var(--accent-color));
    opacity: 0.46;
}

.usage-context-enhanced,
.usage-context-enhanced *,
.wcd-b-wrap,
.wcd-b-wrap * {
    color: var(--ink) !important;
}

.usage-context-enhanced,
.modern-relevance-feature,
.regional-section,
.confusion-section,
.wcd-b-wrap {
    background: var(--card-bg, #fff) !important;
}

.wcd-b-wrap {
    --wcd-lab-bg: var(--card-bg, #fff);
    --wcd-lab-panel: var(--card-bg, #fff);
    --wcd-lab-line: color-mix(in srgb, var(--primary-color) 28%, rgba(30, 27, 75, 0.18));
    border-color: color-mix(in srgb, var(--primary-color) 24%, rgba(30, 27, 75, 0.2)) !important;
    box-shadow: 0 12px 28px rgba(30, 27, 75, 0.08) !important;
}

.wcd-b-card-head,
.wcd-b-card-b .wcd-b-card-head {
    background: color-mix(in srgb, var(--primary-color) 9%, #fff) !important;
}

.wcd-b-cards-row {
    grid-template-columns: minmax(0, 1fr) 3.7rem minmax(0, 1fr);
}

.wcd-b-vs-divider::before {
    width: 3px;
    border-radius: 999px;
    background:
        repeating-linear-gradient(
            to bottom,
            color-mix(in srgb, var(--primary-color) 40%, transparent) 0 10px,
            transparent 10px 18px
        );
}

.wcd-b-vs-badge {
    width: 3.15rem;
    height: 2.65rem;
    display: inline-grid;
    place-items: center;
    padding: 0;
    border: 3px solid var(--ink);
    border-radius: 16px 18px 14px 20px;
    background:
        radial-gradient(circle at 30% 24%, rgba(255, 255, 255, 0.82), transparent 38%),
        linear-gradient(135deg, #fde68a, color-mix(in srgb, var(--accent-color) 28%, #fff));
    color: var(--ink) !important;
    box-shadow:
        4px 4px 0 var(--ink),
        inset -3px -3px 0 rgba(30, 27, 75, 0.08),
        inset 3px 3px 0 rgba(255, 255, 255, 0.48);
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 900;
    letter-spacing: 0.02em;
    line-height: 1;
    text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.7);
    transform: rotate(-6deg);
}

.wcd-b-vs-badge::before {
    content: '';
    position: absolute;
    top: -8px;
    right: -7px;
    width: 16px;
    height: 16px;
    border: 3px solid var(--ink);
    border-radius: 999px;
    background: #bfdbfe;
    box-shadow: 2px 2px 0 var(--ink);
}

.wcd-b-vs-badge::after {
    content: '';
    position: absolute;
    left: -8px;
    bottom: -7px;
    width: 14px;
    height: 14px;
    border: 3px solid var(--ink);
    border-radius: 5px;
    background: #f9a8d4;
    box-shadow: 2px 2px 0 var(--ink);
    transform: rotate(14deg);
}

.wcd-b-title-kicker,
.wcd-b-quick-rule-label,
.wcd-b-key-diff-label,
.wcd-b-card-kicker,
.wcd-b-note-label,
.wcd-b-card-section-label {
    color: var(--primary-dark) !important;
}

.speed-dial-main-btn,
.speed-dial-child-btn {
    border-width: 3px;
    box-shadow: 4px 4px 0 var(--ink), 0 12px 24px rgba(30, 27, 75, 0.1);
}

.scroll-top-btn {
    width: 52px;
    height: 52px;
    border: 3px solid var(--ink);
    border-radius: 18px;
    background: #fff;
    color: var(--ink);
    box-shadow: 4px 4px 0 var(--ink), 0 12px 24px rgba(30, 27, 75, 0.1);
}

.scroll-top-btn:hover,
.scroll-top-btn:focus-visible {
    background: #facc15;
    color: var(--ink);
    transform: translate(-1px, -2px) scale(1);
    box-shadow: 6px 6px 0 var(--ink), 0 16px 30px rgba(30, 27, 75, 0.12);
}

@media (max-width: 900px) {
    .wcd-b-cards-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .wcd-b-vs-divider {
        flex-direction: row;
        height: 52px;
    }

    .wcd-b-vs-divider::before {
        inset: 50% 0 auto 0;
        width: 100%;
        height: 3px;
        background:
            repeating-linear-gradient(
                to right,
                color-mix(in srgb, var(--primary-color) 40%, transparent) 0 10px,
                transparent 10px 18px
            );
    }

    .wcd-b-vs-badge {
        width: 3.5rem;
        height: 2.4rem;
        transform: rotate(-4deg);
    }
}

@media (max-width: 560px) {
    .confusion-chips,
    .wcd-b-card-chips {
        flex-wrap: wrap !important;
        overflow: visible !important;
        padding-bottom: 0 !important;
    }

    .confusion-chip,
    .wcd-b-colloc-chip {
        max-width: 100%;
        white-space: normal;
    }
}

@media (max-width: 1100px) {
    .word-adventure-shell {
        grid-template-columns: 1fr;
    }

    .word-launcher,
    .word-map {
        grid-column: 1;
    }

    .word-launcher {
        position: relative;
        top: auto;
        min-height: 0;
    }

    .header-content {
        display: grid;
        grid-template-columns: minmax(0, 0.85fr) minmax(320px, 1fr);
        align-items: end;
    }

    .header-brand,
    .header-title,
    .launcher-badges {
        grid-column: 1;
    }

    .search-container {
        grid-column: 2;
        grid-row: 1 / span 3;
    }
}

@media (max-width: 820px) {
    .word-adventure-shell {
        padding: 10px;
        gap: 14px;
    }

    .header-content {
        display: flex;
    }

    .word-launcher {
        border-radius: 24px;
        box-shadow: 7px 7px 0 var(--ink);
    }

    .header-title {
        font-size: clamp(2.8rem, 12vw, 4.4rem);
    }

    .launcher-badges {
        display: none;
    }

    .results-container {
        grid-template-columns: 1fr;
        grid-template-areas:
            "word"
            "tabs"
            "content";
        border-radius: 24px;
        box-shadow: 7px 7px 0 var(--ink);
    }

    .word-header {
        min-height: 160px;
    }

    .word-headword {
        font-size: clamp(2.8rem, 14vw, 4.6rem);
    }

    .sticky-tabs {
        position: sticky;
        top: 0;
        z-index: 100;
        overflow-x: auto;
        padding-bottom: 4px;
        scrollbar-width: none;
    }

    .sticky-tabs::-webkit-scrollbar {
        display: none;
    }

    .tab-list {
        flex-direction: row;
        width: max-content;
        min-width: 100%;
    }

    .tab-link {
        white-space: nowrap;
    }

    .content-single-column {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 520px) {
    .word-launcher {
        padding: 1rem;
    }

    .search-box {
        grid-template-columns: 42px minmax(0, 1fr);
        border-width: 3px;
        border-radius: 20px;
    }

    .search-icon {
        width: 42px;
        height: 42px;
        border-width: 3px;
    }

    .search-btn {
        min-height: 48px;
        border-width: 3px;
    }

    .search-hint-chip {
        min-height: 34px;
        padding-inline: 0.7rem;
    }

    .results-container,
    .empty-state,
    .accordion-section,
    .word-header {
        border-width: 3px;
    }

    .accordion-header {
        min-height: 62px;
    }

    .accordion-content {
        padding: 0.9rem;
    }

    .speed-dial-main-btn {
        width: 54px;
        height: 54px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}