/* ==========================================================================
   Kalimat (كَلِمات) — Design System & Stylesheet
   Single source of truth. Merged from style.css + revamp.css; where the two
   sheets disagreed, the revamp rule wins (it loaded last and ruled the cascade).
   ========================================================================== */

@charset "UTF-8";

/* Keep semantic visibility ahead of author layout rules. */
[hidden] { display: none !important; }

/* Self-hosted fonts (SIL OFL, see assets/fonts/OFL.txt) */
@font-face {
    font-family: "Amiri";
    src: url("assets/fonts/Amiri-Regular.woff2") format("woff2");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: "Amiri";
    src: url("assets/fonts/Amiri-Bold.woff2") format("woff2");
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: "Outfit";
    src: url("assets/fonts/Outfit-Regular.woff2") format("woff2");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: "Outfit";
    src: url("assets/fonts/Outfit-Regular.woff2") format("woff2");
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: "Outfit";
    src: url("assets/fonts/Outfit-Regular.woff2") format("woff2");
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

:root,
html[data-theme="paper"] {
    --ink: #14211b;
    --ink-soft: #24332b;
    --paper: #d8cfbf;
    --paper-light: #f3efe5;
    --lime: #d9ff76;
    --accent-border: #15803d;
    --line-dark: rgba(20, 33, 27, 0.34);
    --line-light: rgba(243, 239, 229, 0.40);
    --nav-bg: rgba(20, 33, 27, 0.94);
    --content: min(1180px, calc(100% - 40px));
    --serif: "Amiri", "Readex Pro", "Scheherazade New", "Traditional Arabic", "Noto Naskh Arabic", serif;
    --sans: "Outfit", "Readex Pro", "Segoe UI", system-ui, sans-serif;

    /* ponytail: surface-role tokens were removed as dead weight; reintroduce
       them (and migrate base rules off hardcoded rgba) if a fourth theme lands. */

    /* Elevation */
    --shadow-card: 0 24px 70px rgb(20 33 27 / 16%);
    --shadow-dialog: 0 24px 70px rgb(20 33 27 / 32%);

    /* Rating Button Tokens - Paper Theme (All >= 4.5:1 contrast) */
    --rating-again-bg: #fee2e2;
    --rating-again-text: #991b1b;
    --rating-again-border: #fca5a5;

    --rating-hard-bg: #fef3c7;
    --rating-hard-text: #92400e;
    --rating-hard-border: #fcd34d;

    --rating-good-bg: #dcfce7;
    --rating-good-text: #166534;
    --rating-good-border: #86efac;

    --rating-easy-bg: #e0f2fe;
    --rating-easy-text: #075985;
    --rating-easy-border: #7dd3fc;

    --due-badge-bg: var(--lime);
    --due-badge-text: var(--ink);
    --due-badge-border: var(--lime);
}


html[data-theme="emerald"] {
    --ink: #062c22;
    --ink-soft: #114b3d;
    --paper: #e2dabf;
    --paper-light: #f4f0e6;
    --lime: #d4af37;
    --accent-border: #062c22;
    --line-dark: rgba(6, 44, 34, 0.34);
    --line-light: rgba(244, 240, 230, 0.40);
    --nav-bg: rgba(6, 44, 34, 0.94);

    /* Rating Button Tokens - Emerald Theme (All >= 4.5:1 contrast) */
    --rating-again-bg: #fee2e2;
    --rating-again-text: #991b1b;
    --rating-again-border: #fca5a5;

    --rating-hard-bg: #fef3c7;
    --rating-hard-text: #92400e;
    --rating-hard-border: #fcd34d;

    --rating-good-bg: #dcfce7;
    --rating-good-text: #166534;
    --rating-good-border: #86efac;

    --rating-easy-bg: #e0f2fe;
    --rating-easy-text: #075985;
    --rating-easy-border: #7dd3fc;

    --due-badge-bg: var(--lime);
    --due-badge-text: var(--ink);
    --due-badge-border: var(--lime);
}


html[data-theme="midnight"] {
    --ink: #f1f5f9;
    --ink-soft: #cbd5e1;
    --paper: #152244;
    --paper-light: #0b1329;
    --lime: #38bdf8;
    --accent-border: var(--lime);
    --line-dark: rgba(241, 245, 249, 0.20);
    --line-light: rgba(241, 245, 249, 0.15);
    --nav-bg: rgba(7, 13, 28, 0.94);

    /* Rating Button Tokens - Midnight Dark Theme (All >= 4.5:1 contrast) */
    --rating-again-bg: #450a0a;
    --rating-again-text: #fca5a5;
    --rating-again-border: #7f1d1d;

    --rating-hard-bg: #451a03;
    --rating-hard-text: #fde68a;
    --rating-hard-border: #78350f;

    --rating-good-bg: #052e16;
    --rating-good-text: #86efac;
    --rating-good-border: #14532d;

    --rating-easy-bg: #082f49;
    --rating-easy-text: #7dd3fc;
    --rating-easy-border: #075985;

    --due-badge-bg: rgba(56, 189, 248, 0.18);
    --due-badge-text: var(--lime);
    --due-badge-border: var(--lime);
}


/* ==========================================================================
   Global Base & Typography
   ========================================================================== */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body { margin: 0; background: var(--paper-light); color: var(--ink); font-family: var(--serif); overflow-x: hidden; }

button, a { color: inherit; font: inherit; }

button { border: 0; cursor: pointer; }

a { text-decoration: none; }

button:focus-visible, a:focus-visible, summary:focus-visible, [tabindex]:focus-visible { outline: 3px solid var(--ink); outline-offset: 4px; }

.nav :is(button, a):focus-visible, .word-identity :is(button, a):focus-visible { outline: 3px solid var(--lime); }

.hero a:focus-visible, .horizontal-accordion details:nth-child(-n+2) summary:focus-visible { outline-color: var(--lime); }

.skip-link { position: fixed; z-index: 100; top: 10px; inset-inline-start: 10px; padding: 10px 14px; background: var(--lime); color: var(--ink); font: 600 .8rem var(--sans); transform: translateY(-160%); }

.skip-link:focus { transform: none; }

body:has(.history-dialog[open]), body:has(.practice-dialog[open]), body:has(.lexicon-dialog[open]) { overflow: hidden; }

.page-shell { overflow: clip; }

.svg-sprite { position: absolute; width: 0; height: 0; }

.icon { width: 1.1em; height: 1.1em; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }


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


/* ==========================================================================
   Navigation Bar & Due Review Counter Badge
   ========================================================================== */

.nav-wrap { position: fixed; z-index: 20; top: 16px; right: 0; left: 0; }

.nav { width: var(--content); min-height: 64px; margin: auto; padding: 8px 10px 8px 16px; border: 1px solid var(--line-light); background: var(--nav-bg); color: var(--paper-light); display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 16px; }

.brand { display: inline-flex; align-items: center; justify-self: start; gap: 9px; font-size: 1.3rem; font-weight: 700; }

.nav-note { margin: 0; color: rgb(243 239 229 / 88%); font: 500 .75rem var(--sans); text-align: center; }

.nav-actions { display: flex; justify-content: end; align-items: center; gap: 6px; }

.theme-select { min-height: 44px; padding: 0 10px; background: transparent; border: 1px solid var(--line-light); color: var(--paper-light); font: 600 .78rem var(--sans); cursor: pointer; border-radius: 0; }

.theme-select:focus-visible { outline: 3px solid var(--lime); outline-offset: 4px; }

.theme-select option { background: var(--ink); color: var(--paper-light); font-family: var(--sans); }

.nav-word-link, .primary-button, .speak-button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; font: 600 .78rem var(--sans); }

.nav-word-link { padding: 0 15px; border: 1px solid var(--line-light); }

.icon-button { position: relative; width: 44px; min-width: 44px; height: 44px; display: grid; place-items: center; background: transparent; border: 1px solid var(--line-light); color: inherit; }

.badge { position: absolute; top: -7px; left: -7px; min-width: 19px; padding: 1px 5px; border-radius: 10px; background: var(--paper-light); color: var(--ink); font: 600 .65rem var(--sans); }

.nav-word-link:hover, .icon-button:hover, .streak-badge:hover, .due-review-badge:hover { background: var(--ink-soft); }


.streak-badge { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 0 10px; border: 1px solid var(--line-light); color: var(--paper-light); font: 600 .78rem var(--sans); }

.streak-fire { font-size: 1.1rem; line-height: 1; }


/* Due Review Badge (#due-review-badge) */
.due-review-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 44px;
    padding: 0 12px;
    border: 1px solid var(--line-light);
    background: transparent;
    color: var(--paper-light);
    font: 600 .78rem var(--sans);
    cursor: pointer;
    transition: all .2s ease;
    border-radius: 0;
}

.due-review-badge.has-due {
    background: var(--due-badge-bg);
    color: var(--due-badge-text);
    border-color: var(--due-badge-border);
    font-weight: 700;
}

.due-review-badge.pulse {
    animation: due-badge-pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes due-badge-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(217, 255, 118, 0.6); }
    50% { box-shadow: 0 0 0 6px rgba(217, 255, 118, 0); }
}

html[data-theme="midnight"] .due-review-badge.pulse {
    animation: due-badge-pulse-midnight 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes due-badge-pulse-midnight {
    0%, 100% { box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.6); }
    50% { box-shadow: 0 0 0 6px rgba(56, 189, 248, 0); }
}

.due-icon { font-size: 1rem; line-height: 1; }
svg.badge-icon, svg.due-icon { width: 1em; height: 1em; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.due-count { font-weight: 700; font-family: var(--sans); }

.due-label { font-size: .75rem; }


/* ==========================================================================
   Hero, Manifesto, & Accordion Sections
   ========================================================================== */

.hero { min-height: 100dvh; padding: 142px max(20px, calc((100vw - 1180px) / 2)) 56px; background: var(--ink); color: var(--paper-light); display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(300px, .9fr); gap: clamp(36px, 8vw, 130px); align-items: center; }

.hero-copy { position: relative; z-index: 1; }

.hero-copy > * {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-copy.is-visible > * {
    opacity: 1;
    transform: translateY(0);
}

.hero-copy.is-visible > *:nth-child(1) { transition-delay: 0s; }

.hero-copy.is-visible > *:nth-child(2) { transition-delay: 0.1s; }

.hero-copy.is-visible > *:nth-child(3) { transition-delay: 0.2s; }

.hero-copy.is-visible > *:nth-child(4) { transition-delay: 0.3s; }

.eyebrow, .card-kicker, .reading-label, .accordion-heading > p { margin: 0 0 18px; color: inherit; font: 600 .7rem var(--sans); text-transform: uppercase; }

.hero h1 { margin: 0; font-size: clamp(3.4rem, 7.4vw, 6.4rem); font-weight: 400; line-height: 1.2; letter-spacing: normal; }

.hero h1 span { color: var(--lime); }

.hero-lede { max-width: 36ch; margin: 22px 0 0; color: color-mix(in srgb, var(--paper-light) 88%, transparent); font-size: clamp(1.05rem, 1.6vw, 1.28rem); line-height: 1.7; }
.hero .local-data-note { margin: 22px 0 0; color: color-mix(in srgb, var(--paper-light) 62%, transparent); font: 500 .8rem/1.6 var(--sans); }
.manifesto .channel-boundary { margin: 24px 0 0; color: var(--ink-soft); font: 500 .95rem/1.6 var(--sans); }

.primary-button { padding: 0 20px; background: var(--lime); color: var(--ink); }

.primary-button:hover, .speak-button:hover { transform: translateY(-2px); }

.primary-button:active, .speak-button:active, .icon-button:active, .nav-word-link:active { transform: translateY(1px); }

.hero-art { position: relative; min-height: clamp(260px, 38vw, 440px); overflow: hidden; }

.hero-art::before { content: ""; position: absolute; inset: 18% 8% 18% auto; width: 42%; background: color-mix(in srgb, var(--ink-soft) 55%, transparent); }

.hero-glyph { position: absolute; top: -8%; right: -2%; color: var(--lime); font-size: clamp(14rem, 26vw, 24rem); line-height: 1; opacity: .22; }


.manifesto { padding: clamp(72px, 10vw, 128px) max(20px, calc((100vw - 1040px) / 2)); background: var(--paper-light); }

.manifesto-text { margin: 0; max-width: 22ch; font-size: clamp(1.8rem, 4vw, 3.4rem); line-height: 1.45; letter-spacing: normal; }

.accordion-section { padding: clamp(48px, 6vw, 80px) max(20px, calc((100vw - 1180px) / 2)); background: var(--paper); }

.accordion-heading { max-width: 700px; margin-bottom: 32px; }

.accordion-heading h2 { margin: 0; font-size: clamp(1.9rem, 3.4vw, 3.1rem); font-weight: 400; line-height: 1.35; letter-spacing: normal; }

.horizontal-accordion { min-height: 240px; display: flex; gap: 10px; }

.horizontal-accordion details { position: relative; flex: 1; min-width: 0; min-height: 240px; padding: 24px 26px 28px; background: var(--ink); color: var(--paper-light); overflow: visible; transition: flex .45s ease, background .3s ease; }

.horizontal-accordion details:nth-child(2) { background: var(--ink-soft); }

.horizontal-accordion details:nth-child(3) { background: var(--paper-light); color: var(--ink); }

.horizontal-accordion details:hover, .horizontal-accordion details:focus-within, .horizontal-accordion details[open] { flex: 1.8; }

.horizontal-accordion summary { display: grid; gap: 8px; cursor: pointer; font: 600 .72rem var(--sans); list-style: none; }

.horizontal-accordion summary::-webkit-details-marker { display: none; }

.horizontal-accordion summary::marker { content: ""; }

.horizontal-accordion .accordion-teaser { max-width: 18ch; color: currentColor; font: 400 clamp(.95rem, 1.2vw, 1.15rem) var(--serif); letter-spacing: normal; line-height: 1.45; opacity: .78; }

.horizontal-accordion details > div { display: none; margin-top: 28px; max-width: 32ch; }

.horizontal-accordion details:hover > div, .horizontal-accordion details:focus-within > div, .horizontal-accordion details[open] > div { display: block; }

.horizontal-accordion h3 { margin: 0 0 8px; font-size: clamp(1.35rem, 2vw, 1.7rem); font-weight: 400; line-height: 1.3; letter-spacing: normal; }

.horizontal-accordion p { max-width: 28ch; margin: 0; font-size: .95rem; line-height: 1.6; }

.footer { padding: 30px max(20px, calc((100vw - 1180px) / 2)); background: var(--ink); color: var(--paper-light); display: flex; justify-content: space-between; gap: 20px; align-items: center; }

.footer span { font-size: 1.5rem; }

.footer p, .footer small { margin: 0; color: rgb(243 239 229 / 85%); font: .76rem var(--sans); }


/* ==========================================================================
   Word Identity & Daily Experience
   ========================================================================== */

.word-page { background: var(--paper-light); }

.word-experience { width: var(--content); margin: 112px auto 40px; overflow: clip; box-shadow: var(--shadow-card); }

.word-identity { padding: clamp(24px, 4vw, 56px); background: var(--ink); color: var(--paper-light); border-bottom: 4px solid var(--lime); }

.identity-masthead { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: start; }

.back-link { display: inline-flex; align-items: center; gap: 8px; width: fit-content; color: rgb(243 239 229 / 90%); font: 500 .76rem var(--sans); }

.back-link .icon { transform: scaleX(-1); }

.word-date { min-width: 150px; padding-top: 11px; border-top: 1px solid var(--line-light); display: grid; gap: 4px; }

.word-date span, .next-word { color: rgb(243 239 229 / 85%); font: .68rem var(--sans); }

.word-date strong { font-size: 1.1rem; font-weight: 400; }

.identity-word { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin: clamp(54px, 9vw, 112px) 0 42px; }

.main-word { min-width: 0; max-width: 100%; margin: 0; padding-block: .08em .16em; font-size: clamp(6rem, 17vw, 14rem); font-weight: 400; line-height: 1.35; letter-spacing: normal; overflow-wrap: anywhere; }

.speak-button { padding: 0 18px; background: var(--lime); color: var(--ink); white-space: nowrap; transition: all .2s ease; }

.speak-button.speaking { outline: 2px solid var(--lime); outline-offset: 2px; }

.speak-button.loading,
.example-action-btn.loading,
.speak-button.buffering,
.example-action-btn.buffering {
    opacity: 0.85;
    position: relative;
    cursor: wait;
    animation: pulse-buffering 1.2s ease-in-out infinite;
}


@keyframes pulse-buffering {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(0.97); }
}

.speak-button:disabled, .example-action-btn:disabled { opacity: 0.45; cursor: not-allowed; }

.linguistic-data { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line-light); }

.linguistic-data div { min-height: 92px; padding: 16px; border-inline-start: 1px solid var(--line-light); }

.linguistic-data div:first-child { border-inline-start: 0; }

.linguistic-data span { display: block; margin-bottom: 7px; color: rgb(243 239 229 / 85%); font: .66rem var(--sans); }

.linguistic-data strong { font-size: 1.25rem; font-weight: 400; line-height: 1.3; }

.word-reading { padding: clamp(24px, 4vw, 56px); background: var(--paper); color: var(--ink); }

.reading-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(220px, .7fr); gap: clamp(28px, 5vw, 72px); }

.reading-label { color: var(--ink); }

.meaning-text { max-width: 25ch; font-size: clamp(2rem, 4vw, 3.7rem); line-height: 1.45; letter-spacing: normal; }

.word-pronunciation, .meaning-english { direction: ltr; text-align: left; max-width: 62ch; font-family: var(--sans); }

.word-pronunciation { margin: 28px 0 7px; font-size: .96rem; letter-spacing: .08em; }

.meaning-english { margin: 0; color: var(--ink-soft); line-height: 1.65; }

.example-panel { margin: clamp(44px, 6vw, 80px) 0 0; padding: 0 24px 0 0; border: 0; border-inline-start: 3px solid var(--lime); font-size: clamp(1.4rem, 2.5vw, 2rem); line-height: 1.65; letter-spacing: normal; }

.reading-sidebar { padding-top: 7px; border-top: 1px solid var(--line-dark); font-size: 1.15rem; line-height: 1.7; }

.reading-sidebar p { margin: 0 0 26px; }

.reading-sidebar .next-word { color: var(--ink-soft); }

.next-word b { color: var(--ink); font-weight: 600; }

.archive-notice { padding-top: 18px; border-top: 1px solid var(--line-dark); color: var(--ink-soft); font-size: .95rem; }
.reading-sidebar .local-data-note,
.reading-sidebar .channel-boundary { color: var(--ink-soft); font: 500 .85rem/1.6 var(--sans); }

.archive-preview-note { margin: 18px 0 0; color: var(--ink-soft); font-size: .95rem; }

.return-today-button { min-height: 44px; margin-top: 12px; padding: 0 14px; background: var(--ink); color: var(--paper-light); font: 600 .75rem var(--sans); }


.app-menu-dropdown { position: fixed; z-index: 30; top: 87px; left: max(20px, calc((100vw - 1180px) / 2)); min-width: 260px; padding: 6px; border: 1px solid var(--line-dark); background: var(--paper-light); box-shadow: 0 18px 45px rgb(20 33 27 / 20%); }

.app-menu-dropdown[hidden] { display: none; }

.app-menu-dropdown button { width: 100%; min-height: 44px; padding: 10px 12px; background: transparent; display: flex; align-items: center; gap: 10px; text-align: start; font-size: .9rem; }

.app-menu-dropdown button:hover { background: var(--paper); }


/* ==========================================================================
   History Dialog & Actions
   ========================================================================== */

.history-dialog { width: min(560px, calc(100% - 32px)); max-height: min(760px, calc(100dvh - 32px)); padding: clamp(22px, 4vw, 44px); border: 0; background: var(--paper-light); color: var(--ink); box-shadow: var(--shadow-dialog); display: flex; flex-direction: column; overflow: hidden; }

.history-dialog:not([open]) { display: none; }

.history-dialog::backdrop { background: rgb(20 33 27 / 72%); }

.history-dialog header { display: flex; align-items: start; justify-content: space-between; gap: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--line-dark); }

.history-dialog header p { margin: 0; color: var(--ink-soft); font: .7rem var(--sans); }

.history-dialog h2 { margin: 7px 0 0; font-size: clamp(2rem, 6vw, 3.2rem); font-weight: 400; line-height: 1.35; letter-spacing: normal; }

.history-dialog .icon-button { border-color: var(--line-dark); color: var(--ink); }

.drawer-content { padding-top: 12px; min-height: 0; overflow-y: auto; overscroll-behavior: contain; }

.history-list { margin: 0; padding: 0; list-style: none; background: var(--paper-light); }

.history-item { border-bottom: 1px solid var(--line-dark); }

.history-item button { width: 100%; padding: 18px 0; background: transparent; text-align: start; }

.history-item button:hover { color: var(--ink-soft); }

.history-item-header { display: flex; justify-content: space-between; gap: 16px; align-items: baseline; }

.word-headline-wrap { display: flex; align-items: baseline; gap: clamp(12px, 2vw, 24px); }

.favorite-button { width: 46px; height: 46px; border-radius: 50%; border: 1px solid var(--line-light); background: transparent; color: rgb(243 239 229 / 85%); display: inline-flex; align-items: center; justify-content: center; cursor: pointer; transition: all .2s ease; }

.favorite-button:hover { border-color: var(--lime); color: var(--lime); transform: scale(1.08); }

.favorite-button[aria-pressed="true"], .favorite-button.active { color: #f59e0b; border-color: #f59e0b; background: rgb(245 158 11 / 15%); }

.favorite-button svg { width: 22px; height: 22px; }

.history-item-star { color: #f59e0b; margin-inline-start: 6px; font-size: .9rem; }


.example-container { margin: clamp(44px, 6vw, 80px) 0 0; }

.example-container .example-panel { margin: 0 0 16px 0; }

.example-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; padding-inline-start: 24px; }

.example-action-btn { display: inline-flex; align-items: center; min-height: 44px; gap: 8px; padding: 7px 14px; border: 1px solid var(--line-dark); background: var(--paper-light); color: var(--ink); font: 500 .78rem var(--sans); border-radius: 999px; transition: all .2s ease; cursor: pointer; }

.example-action-btn:hover { background: var(--ink); color: var(--paper-light); border-color: var(--ink); }

.example-action-btn.speaking { background: var(--lime); color: var(--ink); border-color: var(--lime); }

.example-action-btn svg { width: 16px; height: 16px; }


.audio-controls-group { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

.audio-option-btn { height: 44px; padding: 0 14px; border-radius: 999px; border: 1px solid var(--line-light); background: rgba(243, 239, 229, 0.08); color: var(--paper-light); font: 600 .75rem var(--sans); cursor: pointer; transition: all .2s; }

.audio-option-btn:hover { border-color: var(--lime); background: rgba(132, 204, 22, 0.15); color: var(--lime); }

.audio-option-btn.active { border-color: var(--lime); background: var(--lime); color: var(--ink); }


.related-words-section { margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line-light); }

.related-label { margin: 0 0 10px; color: rgb(243 239 229 / 80%); font: 500 .75rem var(--sans); }

.related-words-list { display: flex; flex-wrap: wrap; gap: 8px; }

.related-word-pill { min-height: 44px; padding: 6px 16px; background: rgba(243, 239, 229, 0.08); color: var(--paper-light); border: 1px solid var(--line-light); border-radius: 999px; font-size: 1.05rem; cursor: pointer; transition: all .2s ease; display: inline-flex; align-items: center; gap: 6px; }

.related-word-pill:hover { background: var(--lime); color: var(--ink); border-color: var(--lime); transform: translateY(-2px); }

.related-word-badge { font: 500 .68rem var(--sans); opacity: .85; }


.history-dialog-toolbar { display: flex; flex-direction: column; gap: 12px; margin: 16px 0 12px; }

.history-search-box { position: relative; width: 100%; display: flex; align-items: center; }

.history-search-input { width: 100%; height: 44px; padding: 0 42px 0 16px; border: 1px solid var(--line-dark); background: var(--paper); color: var(--ink); font-size: .95rem; border-radius: 8px; outline: none; transition: border-color .2s; }

.history-search-input:focus { border-color: var(--ink); }

.search-icon { position: absolute; inset-inline-start: 14px; width: 18px; height: 18px; color: var(--ink-soft); pointer-events: none; }

.history-filter-tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--line-dark); padding-bottom: 8px; }

.history-tab { min-height: 44px; padding: 6px 14px; border: 1px solid transparent; background: transparent; color: var(--ink-soft); font: 600 .75rem var(--sans); border-radius: 999px; cursor: pointer; transition: all .2s; }

.history-tab:hover { color: var(--ink); background: var(--paper); }

.history-tab.active, .history-tab[aria-selected="true"] { background: var(--ink); color: var(--paper-light); }

.history-dialog-actions { display: flex; gap: 8px; }

.history-action-btn.highlight { background: var(--lime); color: var(--ink); border-color: var(--lime); font-weight: 700; }

.history-action-btn.highlight:hover { filter: brightness(0.95); }


/* ==========================================================================
   Spaced Repetition Review UI (#practice-dialog, Flashcards & 4-Tier SM-2)
   ========================================================================== */

.practice-dialog, .shortcuts-dialog {
    width: min(640px, calc(100% - 32px));
    max-height: min(840px, calc(100dvh - 32px));
    padding: clamp(20px, 3.5vw, 36px);
    border: 0;
    background: var(--paper-light);
    color: var(--ink);
    box-shadow: var(--shadow-dialog);
    border-radius: 16px;
}

.practice-dialog::backdrop, .shortcuts-dialog::backdrop {
    background: rgb(20 33 27 / 72%);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.practice-dialog header, .shortcuts-dialog header {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line-dark);
}

.practice-dialog header p, .shortcuts-dialog header p { margin: 0; color: var(--ink-soft); font: 600 .72rem var(--sans); }

.practice-dialog h2, .shortcuts-dialog h2 { margin: 6px 0 0; font-size: clamp(1.8rem, 5vw, 2.6rem); font-weight: 400; line-height: 1.35; letter-spacing: normal; }

.practice-dialog .icon-button, .shortcuts-dialog .icon-button { border-color: var(--line-dark); color: var(--ink); border-radius: 8px; }


.practice-container {
    padding-top: 14px;
}


/* Session Progress Bar */
.practice-header-status {
    margin-bottom: 14px;
}
.review-helper { margin: 0 0 14px; color: var(--ink-soft); font: 500 .9rem/1.6 var(--sans); }

.practice-progress-bar-wrap {
    width: 100%;
    height: 8px;
    background: var(--paper);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 8px;
}

.practice-progress-bar-fill {
    height: 100%;
    background: var(--lime);
    border-radius: 999px;
    transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

html[data-theme="paper"] .practice-progress-bar-fill {
    background: #15803d;
}

html[data-theme="emerald"] .practice-progress-bar-fill {
    background: #d4af37;
}

html[data-theme="midnight"] .practice-progress-bar-fill {
    background: #38bdf8;
}


.practice-progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font: 600 .8rem var(--sans);
    color: var(--ink-soft);
}

.practice-due-pill {
    padding: 2px 10px;
    background: var(--paper);
    border-radius: 999px;
    font-size: .72rem;
    font-weight: 600;
}


/* Flashcard Scene & 3D Perspective Flip */
.flashcard-scene {
    perspective: 1200px;
    width: 100%;
    margin: 10px 0 16px;
    display: flex;
    flex-direction: column;
}


.flashcard-card {
    position: relative;
    width: 100%;
    min-height: 320px;
    transform-style: preserve-3d;
    transition: transform 0.55s cubic-bezier(0.34, 1.56, 0.64, 1);
    border-radius: 14px;
}


.card-front-flip:focus-visible {
    outline: 3px solid var(--ink);
    outline-offset: 4px;
}

html[data-theme="midnight"] .card-front-flip:focus-visible {
    outline-color: var(--lime);
}


.flashcard-card.is-flipped {
    transform: rotateY(180deg);
}


/* Flashcard Faces */
.flashcard-face {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    padding: 22px;
    border-radius: 14px;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-sizing: border-box;
    border: 1px solid var(--line-dark);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}


.flashcard-front {
    background: var(--paper);
    color: var(--ink);
}


.flashcard-back {
    background: var(--paper-light);
    color: var(--ink);
    transform: rotateY(180deg);
    border: 1.5px solid var(--line-dark);
}


.flashcard-meta-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font: 500 .75rem var(--sans);
    color: var(--ink-soft);
}


.flashcard-badge-category {
    padding: 3px 10px;
    border-radius: 999px;
    background: var(--paper-light);
    border: 1px solid var(--line-dark);
    font-size: .72rem;
    font-weight: 600;
}

html[data-theme="midnight"] .flashcard-badge-category {
    background: var(--paper);
}


.flashcard-badge-ease {
    font-family: var(--sans);
    font-size: .72rem;
    color: var(--ink-soft);
}


.flashcard-front-center {
    text-align: center;
    margin: 12px 0;
}


.flashcard-word {
    font-size: clamp(3rem, 7vw, 4.4rem);
    font-weight: 400;
    margin: 0 0 6px;
    line-height: 1.25;
}


.flashcard-transliteration {
    font-family: var(--sans);
    font-size: 1rem;
    color: var(--ink-soft);
    direction: ltr;
    margin: 2px 0;
}


.flashcard-root-weight {
    font-size: .95rem;
    color: var(--ink-soft);
    margin: 4px 0;
}


.flashcard-vocalization {
    font-size: .88rem;
    color: var(--ink-soft);
    margin: 4px 0;
}


.flashcard-front-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}


.flashcard-audio-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--lime);
    color: var(--ink);
    font: 600 .78rem var(--sans);
    cursor: pointer;
    transition: transform .15s ease;
}

.flashcard-audio-btn:hover {
    transform: translateY(-2px);
}

.flashcard-audio-btn:focus-visible {
    outline: 2px solid var(--ink);
    outline-offset: 2px;
}


.flashcard-hint-text {
    margin: 0;
    font: 500 .75rem var(--sans);
    color: var(--ink-soft);
}


/* Flashcard Back Face */
.flashcard-back-center {
    margin: 8px 0;
}


.flashcard-meaning {
    font-size: clamp(1.35rem, 3.5vw, 2rem);
    margin: 0 0 8px;
    line-height: 1.35;
}


.flashcard-meaning-en {
    font-family: var(--sans);
    font-size: 1.05rem;
    color: var(--ink-soft);
    direction: ltr;
    text-align: left;
    margin: 0 0 10px;
    line-height: 1.5;
}


.flashcard-back-root {
    font-size: .92rem;
    color: var(--ink-soft);
    margin: 0 0 8px;
}


.flashcard-example {
    margin: 0;
    padding: 0 12px 0 0;
    border-inline-start: 3px solid var(--lime);
    font-size: 1.02rem;
    line-height: 1.55;
    color: var(--ink);
    font-style: normal;
}


.flashcard-back-bottom {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
}

.flashcard-back-bottom .flashcard-audio-btn {
    align-self: flex-start;
}


.flashcard-rating-section {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 20px;
}

.flashcard-rating-section[hidden] {
    display: none;
}


.flashcard-rate-prompt {
    margin: 0;
    font: 600 .8rem var(--sans);
    color: var(--ink-soft);
    text-align: center;
}


/* 4-Tier SM-2 Rating Controls Bar */
.flashcard-rating-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-top: 0;
}

.flashcard-rating-bar[hidden] {
    display: none;
}


.rating-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 10px 6px;
    border-radius: 10px;
    min-height: 64px;
    cursor: pointer;
    border: 1.5px solid transparent;
    transition: transform 0.15s ease, filter 0.15s ease;
    font-family: var(--sans);
}


.rating-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    filter: brightness(0.96);
}


.rating-btn:active:not(:disabled) {
    transform: translateY(1px);
}


.rating-btn:focus-visible {
    outline: 3px solid var(--ink);
    outline-offset: 3px;
}

html[data-theme="midnight"] .rating-btn:focus-visible {
    outline-color: var(--lime);
}


.rating-badge-key {
    font-size: 0.72rem;
    font-weight: 700;
    opacity: 0.85;
}


.rating-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin: 2px 0;
}


.rating-interval {
    font-size: 0.7rem;
    opacity: 0.85;
}


/* WCAG 2.1 AA Compliant Rating Color Classes */
.rating-btn.rating-again,
.rating-again {
    background: var(--rating-again-bg);
    color: var(--rating-again-text);
    border-color: var(--rating-again-border);
}

.rating-btn.rating-again:hover {
    filter: brightness(0.95);
}


.rating-btn.rating-hard,
.rating-hard {
    background: var(--rating-hard-bg);
    color: var(--rating-hard-text);
    border-color: var(--rating-hard-border);
}

.rating-btn.rating-hard:hover {
    filter: brightness(0.95);
}


.rating-btn.rating-good,
.rating-good {
    background: var(--rating-good-bg);
    color: var(--rating-good-text);
    border-color: var(--rating-good-border);
}

.rating-btn.rating-good:hover {
    filter: brightness(0.95);
}


.rating-btn.rating-easy,
.rating-easy {
    background: var(--rating-easy-bg);
    color: var(--rating-easy-text);
    border-color: var(--rating-easy-border);
}

.rating-btn.rating-easy:hover {
    filter: brightness(0.95);
}


/* Practice Summary & Celebration View */
.practice-summary {
    text-align: center;
    padding: 24px 0 10px;
}

.practice-summary-title {
    font-size: clamp(2rem, 5vw, 3rem);
    margin: 0 0 12px;
    font-weight: 400;
}

.practice-summary-desc {
    font-size: 1.12rem;
    color: var(--ink-soft);
    margin-bottom: 20px;
    line-height: 1.6;
}

.practice-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 24px;
}

.practice-stat-box {
    padding: 12px;
    background: var(--paper);
    border-radius: 10px;
    border: 1px solid var(--line-dark);
}

.practice-stat-box span {
    display: block;
    font: 500 .72rem var(--sans);
    color: var(--ink-soft);
    margin-bottom: 4px;
}

.practice-stat-box strong {
    font-size: 1.3rem;
    font-weight: 700;
    font-family: var(--sans);
}


.practice-cta-btn {
    padding: 12px 28px;
    background: var(--lime);
    color: var(--ink);
    font: 700 .9rem var(--sans);
    border-radius: 999px;
    border: 0;
    cursor: pointer;
    transition: transform .2s ease;
}

.practice-cta-btn:hover {
    transform: translateY(-2px);
}


/* ==========================================================================
   Interactive Lexicon & Root Tree Explorer (معجم الجذور والأوزان)
   ========================================================================== */

.hero-cta-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}


.hero-loop {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 12px;
    margin-block-start: 28px;
}

.hero-loop .next-word {
    margin: 0;
    color: color-mix(in srgb, var(--paper-light) 70%, transparent);
    font: 500 .78rem var(--sans);
}

.hero-loop .next-word b {
    color: var(--paper-light);
    font-variant-numeric: tabular-nums;
}

.how-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.how-steps li {
    padding: 20px 22px;
    border: 1px solid var(--line-dark);
    background: var(--paper-light);
}

.how-step-num {
    display: inline-block;
    margin-bottom: 10px;
    color: var(--ink-soft);
    font: 700 1.4rem var(--serif);
}

.how-steps h3 {
    margin: 0 0 6px;
    font-size: 1.35rem;
    font-weight: 400;
    line-height: 1.35;
    letter-spacing: normal;
}

.how-steps p {
    margin: 0;
    color: var(--ink-soft);
    font: 400 .82rem var(--sans);
    line-height: 1.5;
}


@media (max-width: 720px) {
    .how-steps {
        grid-template-columns: 1fr;
    }
}


.secondary-button {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0 20px;
    border: 1px solid var(--line-light);
    background: transparent;
    color: var(--paper-light);
    font: 600 .78rem var(--sans);
    transition: all .2s ease;
    letter-spacing: normal;
}


.secondary-button:hover,
.secondary-button:focus-visible {
    background: var(--paper-light);
    color: var(--ink);
    border-color: var(--paper-light);
}


.nav-explorer-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0 12px;
    border: 1px solid var(--line-light);
    font: 600 .78rem var(--sans);
    letter-spacing: normal;
}


.nav-explorer-link:hover,
.nav-explorer-link:focus-visible {
    background: var(--lime);
    color: var(--ink);
}


.lexicon-explorer-section {
    width: var(--content);
    margin: 0 auto;
    padding: clamp(72px, 9vw, 128px) 0;
}


.lexicon-header {
    max-width: 820px;
    margin: 0 0 clamp(28px, 4vw, 40px);
}


.lexicon-header h2 {
    margin: 0 0 16px;
    font-size: clamp(2rem, 4.4vw, 3.4rem);
    font-weight: 400;
    line-height: 1.35;
    letter-spacing: normal;
}


.lexicon-lede {
    margin: 0;
    font-size: clamp(1.05rem, 2vw, 1.35rem);
    color: var(--ink-soft);
    line-height: 1.6;
    letter-spacing: normal;
}


.lexicon-toolbar {
    max-width: 1180px;
    margin: 0 auto clamp(28px, 4vw, 44px);
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: clamp(20px, 4vw, 32px);
    padding-inline: 0;
}


.lexicon-search-bar {
    display: flex;
    gap: 12px;
    align-items: center;
}


.lexicon-search-wrap {
    position: relative;
    display: flex;
    align-items: center;
    flex: 1;
}


.lexicon-search-input {
    width: 100%;
    min-height: 52px;
    padding: 0 46px 0 16px;
    border: 1px solid var(--line-dark);
    background: var(--paper-light);
    color: var(--ink);
    font: 500 1.02rem var(--sans);
    letter-spacing: normal;
    transition: border-color .2s ease;
}


.lexicon-search-input:focus-visible {
    outline: 3px solid var(--ink);
    outline-offset: 2px;
}


.lexicon-search-wrap .search-icon {
    position: absolute;
    right: 16px;
    width: 1.25rem;
    height: 1.25rem;
    color: var(--ink-soft);
    pointer-events: none;
}


.lexicon-clear-btn {
    min-height: 52px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0 18px;
    background: var(--paper-light);
    border: 1px solid var(--line-dark);
    color: var(--ink);
    font: 600 .8rem var(--sans);
    cursor: pointer;
    letter-spacing: normal;
    transition: all .2s ease;
    white-space: nowrap;
}
.lexicon-clear-btn[hidden] { display: none; }


.lexicon-clear-btn:hover,
.lexicon-clear-btn:focus-visible {
    background: var(--lime);
    color: var(--ink);
}


.lexicon-filters-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}


.lexicon-filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}


.lexicon-filter-label {
    font: 600 .75rem var(--sans);
    color: var(--ink-soft);
    text-transform: uppercase;
}


.lexicon-select {
    min-height: 48px;
    padding: 0 14px;
    border: 1px solid var(--line-dark);
    background: var(--paper-light);
    color: var(--ink);
    font: 500 .92rem var(--sans);
    cursor: pointer;
    letter-spacing: normal;
}


.lexicon-select:focus-visible {
    outline: 3px solid var(--ink);
    outline-offset: 2px;
}


.lexicon-select option {
    background: var(--paper-light);
    color: var(--ink);
    font-family: var(--sans);
}


.lexicon-subfilters {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--line-dark);
}


.lexicon-subfilter-title {
    display: block;
    font: 600 .75rem var(--sans);
    color: var(--ink-soft);
    margin-bottom: 10px;
    text-transform: uppercase;
}


.lexicon-category-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}


.lexicon-chip {
    padding: 7px 14px;
    border: 1px solid var(--line-dark);
    background: var(--paper-light);
    color: var(--ink);
    font: 600 .8rem var(--sans);
    cursor: pointer;
    letter-spacing: normal;
    transition: all .15s ease;
}


.lexicon-chip:hover,
.lexicon-chip:focus-visible {
    border-color: var(--ink);
    background: var(--lime);
    color: var(--ink);
}


.lexicon-chip.active {
    background: var(--ink);
    color: var(--paper-light);
    border-color: var(--ink);
}


.lexicon-letter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}


.lexicon-letter-btn {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line-dark);
    background: var(--paper-light);
    color: var(--ink);
    font: 700 1.05rem var(--serif);
    cursor: pointer;
    letter-spacing: normal;
    transition: all .15s ease;
}


.lexicon-letter-btn:hover,
.lexicon-letter-btn:focus-visible {
    background: var(--lime);
    color: var(--ink);
    border-color: var(--ink);
}


.lexicon-letter-btn.active {
    background: var(--ink);
    color: var(--paper-light);
    border-color: var(--ink);
}


.lexicon-results-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 14px;
    border-top: 1px solid var(--line-dark);
}


.lexicon-results-count {
    font: 600 .88rem var(--sans);
    color: var(--ink);
    letter-spacing: normal;
}


.lexicon-grid {
    max-width: 1180px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr));
    gap: 18px;
}


.lexicon-card {
    background: transparent;
    border: 0;
    border-block-start: 1px solid var(--line-dark);
    padding: 18px 0 8px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 10px;
    transition: transform .2s ease, box-shadow .2s ease;
}


.lexicon-card:hover {
    transform: none;
    box-shadow: none;
}


.lexicon-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
}


.lexicon-card-heading-wrap {
    flex: 1;
}


.lexicon-card-word {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: normal;
    font-family: var(--serif);
    color: var(--ink);
}


.lexicon-card-pronunciation {
    display: block;
    font: 400 .82rem var(--sans);
    color: var(--ink-soft);
    letter-spacing: .05em;
    margin-top: 4px;
}


.lexicon-audio-btn {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--paper-light);
    border: 1px solid var(--line-dark);
    color: var(--ink);
    cursor: pointer;
    transition: all .2s ease;
    flex-shrink: 0;
}


.lexicon-audio-btn:hover,
.lexicon-audio-btn:focus-visible {
    background: var(--lime);
    color: var(--ink);
}


.lexicon-audio-btn.speaking {
    background: var(--lime);
    color: var(--ink);
    animation: due-badge-pulse 1.2s infinite ease-in-out;
}


.lexicon-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}


.lexicon-pill {
    padding: 3px 7px;
    border: 1px solid var(--line-dark);
    background: var(--paper-light);
    color: var(--ink);
    font: 500 .72rem var(--sans);
    cursor: pointer;
    letter-spacing: normal;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all .15s ease;
}


.lexicon-pill:hover,
.lexicon-pill:focus-visible {
    border-color: var(--ink);
    background: var(--lime);
    color: var(--ink);
}


.lexicon-pill-cat {
    font-weight: 600;
}


.pill-kicker {
    opacity: .75;
}


.lexicon-card-body {
    flex: 1;
}


.lexicon-card-vocalization {
    font: 400 .88rem var(--serif);
    color: var(--ink-soft);
    line-height: 1.45;
    letter-spacing: normal;
    margin: 0 0 10px;
}


.lexicon-card-meaning {
    font-size: 1rem;
    line-height: 1.45;
    letter-spacing: normal;
    color: var(--ink);
    margin: 0;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
}


.lexicon-card-english {
    font: 400 .86rem var(--sans);
    color: var(--ink-soft);
    line-height: 1.4;
    margin: 0 0 12px;
}


.lexicon-card-example {
    margin: 0;
    padding-inline-start: 12px;
    border-inline-start: 3px solid var(--lime);
    font: 400 .95rem var(--serif);
    line-height: 1.6;
    letter-spacing: normal;
    color: var(--ink-soft);
}


.lexicon-card-footer {
    border-top: 1px solid var(--line-dark);
    padding-top: 10px;
}


.lexicon-read-btn {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    min-height: 44px;
    padding: 0 10px;
    background: var(--paper-light);
    border: 1px solid var(--line-dark);
    color: var(--ink);
    font: 600 .76rem var(--sans);
    letter-spacing: normal;
    transition: all .2s ease;
}


.lexicon-read-btn:hover,
.lexicon-read-btn:focus-visible {
    background: var(--ink);
    color: var(--paper-light);
    border-color: var(--ink);
}


.lexicon-empty-state {
    max-width: 540px;
    margin: 40px auto;
    text-align: center;
    padding: 48px 24px;
    background: var(--paper);
    border: 1px solid var(--line-dark);
}


.lexicon-empty-state p {
    font-size: 1.2rem;
    color: var(--ink-soft);
    margin: 0 0 20px;
    line-height: 1.5;
    letter-spacing: normal;
}


/* Lexicon Dialog Modal */
.lexicon-dialog {
    width: min(94vw, 1200px);
    max-height: 90vh;
    padding: clamp(20px, 3vw, 36px);
    background: var(--paper-light);
    color: var(--ink);
    border: 1px solid var(--line-dark);
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.3);
    overflow-y: auto;
}


.lexicon-dialog::backdrop {
    background: rgba(10, 18, 14, 0.75);
    backdrop-filter: blur(4px);
}


.lexicon-dialog header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--line-dark);
    margin-bottom: 24px;
}


.lexicon-dialog h2 {
    margin: 6px 0 0;
    font-size: clamp(1.8rem, 5vw, 2.6rem);
    font-weight: 400;
    line-height: 1.35;
    letter-spacing: normal;
}


.lexicon-modal-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}


/* ==========================================================================
   Shortcuts Dialog, Toast, & Storage Warnings
   ========================================================================== */

.shortcuts-body { padding-top: 16px; }

.shortcuts-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }

.shortcuts-list li { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--line-dark); font-size: .95rem; }

.key-combo { display: inline-flex; gap: 6px; align-items: center; }

kbd { display: inline-block; padding: 3px 8px; font: 600 .75rem var(--sans); background: var(--paper); color: var(--ink); border: 1px solid var(--line-dark); border-radius: 4px; box-shadow: 0 2px 0 var(--line-dark); }


.history-word { font-size: 2rem; letter-spacing: normal; }

.history-date { color: var(--ink-soft); font: .68rem var(--sans); }

.history-meaning { margin: 7px 0 0; line-height: 1.55; letter-spacing: normal; }

.drawer-empty-msg { margin: 0; padding: 42px 0; color: var(--ink-soft); }

.storage-warning { width: var(--content); margin: 0 auto 20px; padding: 12px; background: var(--paper); border: 1px solid var(--line-dark); }

.toast { position: fixed; z-index: 40; inset-inline: 0; bottom: 22px; margin-inline: auto; max-width: calc(100% - 32px); width: fit-content; transform: translateY(130px); padding: 12px 16px; background: var(--ink); color: var(--paper-light); font-family: var(--sans); transition: transform .25s ease; }

.toast.show { transform: translateY(0); }


/* ==========================================================================
   Responsive Breakpoints & Reduced Motion
   ========================================================================== */

@media (max-width: 720px) {
    :root { --content: min(100% - 28px, 1180px); }
    .nav { grid-template-columns: 1fr auto; }
    .nav-note { display: none; }
    .hero { min-height: 100dvh; padding-top: 116px; grid-template-columns: 1fr; gap: 42px; }
    .hero h1 { font-size: clamp(3.1rem, 16vw, 4.6rem); }
    .hero-art { min-height: 220px; }
    .manifesto, .accordion-section { padding-inline: 20px; }
    .horizontal-accordion { min-height: 0; flex-direction: column; gap: 8px; }
    .horizontal-accordion details { min-height: 0; overflow: visible; }
    .horizontal-accordion details:hover, .horizontal-accordion details:focus-within, .horizontal-accordion details[open] { flex: none; min-height: 0; }
    .horizontal-accordion details > div { margin-top: 14px; }
    .horizontal-accordion .accordion-teaser { display: none; }
    .word-experience { margin-top: 96px; }
    .identity-masthead { grid-template-columns: 1fr; }
    .identity-word { align-items: start; flex-direction: column; margin-block: 58px 34px; }
    .main-word { font-size: clamp(6.6rem, 27vw, 10rem); }
    .linguistic-data { grid-template-columns: repeat(2, 1fr); }
    .linguistic-data div:nth-child(3) { border-inline-start: 0; border-top: 1px solid var(--line-light); }
    .linguistic-data div:nth-child(4) { border-top: 1px solid var(--line-light); }
    .reading-grid { grid-template-columns: 1fr; }
    .meaning-text { max-width: none; }
    .usage-context { margin-top: 28px; padding-inline: 16px; }
    .inline-review-button { width: 100%; }
    .footer { flex-direction: column; align-items: flex-start; }
}


@media (max-width: 600px) {
    .flashcard-rating-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    .flashcard-card {
        min-height: 290px;
    }
    .practice-stats-grid {
        grid-template-columns: 1fr;
    }
    .lexicon-grid {
        grid-template-columns: 1fr;
    }
}


@media (hover: none) {
    .horizontal-accordion details { transition-duration: .01ms; }
}


@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
    .speak-button.loading,
    .example-action-btn.loading,
    .speak-button.buffering,
    .example-action-btn.buffering {
        animation: none !important;
        opacity: 0.8;
    }
    .flashcard-card {
        transition: none !important;
    }
    .flashcard-card.is-flipped .flashcard-front {
        opacity: 0 !important;
        pointer-events: none;
    }
    .flashcard-card:not(.is-flipped) .flashcard-back {
        opacity: 0 !important;
        pointer-events: none;
    }
    .flashcard-back {
        transform: none !important;
    }
    .due-review-badge.pulse {
        animation: none !important;
    }
}


/* ==========================================================================
   Print Media Styles
   ========================================================================== */

@media print {
    body {
        background: white !important;
        color: black !important;
    }

    .skip-link,
    .nav-wrap,
    .nav,
    .footer,
    .back-link,
    #btn-speak,
    .reading-sidebar,
    .app-menu-dropdown,
    #history-dialog,
    #storage-warning,
    .toast,
    button,
    svg.svg-sprite {
        display: none !important;
    }

    .word-experience,
    .word-card,
    .word-reading {
        border: 2px solid #000;
        padding: 1.5rem;
        margin: 1rem auto;
        max-width: 650px;
        box-shadow: none !important;
        page-break-inside: avoid;
        break-inside: avoid;
        background: white !important;
        color: black !important;
    }
}


/* ponytail: midnight theme keeps per-element overrides instead of full surface
   tokenization — base rules hardcode paper-theme rgba values, and rewriting them
   all risks visual regressions across three themes. Introduce --surface/--surface-text
   tokens and migrate base rules if a fourth theme ever lands. */
html[data-theme="midnight"] .nav,
html[data-theme="midnight"] #theme-select,
html[data-theme="midnight"] .nav-word-link,
html[data-theme="midnight"] .streak-badge,
html[data-theme="midnight"] .due-review-badge,
html[data-theme="midnight"] .audio-option-btn,
html[data-theme="midnight"] .related-word-pill {
    color: var(--ink);
}


html[data-theme="midnight"] #theme-select option {
    background: var(--paper-light);
    color: var(--ink);
}


html[data-theme="midnight"] .primary-button,
html[data-theme="midnight"] .speak-button,
html[data-theme="midnight"] .skip-link,
html[data-theme="midnight"] .example-action-btn.speaking,
html[data-theme="midnight"] .audio-option-btn.active,
html[data-theme="midnight"] .history-action-btn.highlight,
html[data-theme="midnight"] .practice-cta-btn,
html[data-theme="midnight"] .related-word-pill:hover {
    color: var(--paper-light);
}

/* Transparent-fill button on the dark hero: --paper-light flips dark in
   midnight, so the resting label must use the light ink token instead. */
html[data-theme="midnight"] .secondary-button {
    color: var(--ink);
}


html[data-theme="midnight"] .hero,
html[data-theme="midnight"] .word-identity,
html[data-theme="midnight"] .footer {
    background: var(--paper-light);
    color: var(--ink);
}


html[data-theme="midnight"] .hero h1 span {
    color: var(--lime);
}


html[data-theme="midnight"] .hero-lede,
html[data-theme="midnight"] .back-link,
html[data-theme="midnight"] .word-date span,
html[data-theme="midnight"] .linguistic-data span,
html[data-theme="midnight"] .footer p,
html[data-theme="midnight"] .footer small {
    color: var(--ink-soft);
}

html[data-theme="midnight"] .hero .local-data-note,
html[data-theme="midnight"] .hero-loop .next-word {
    color: color-mix(in srgb, var(--ink) 62%, transparent);
}

html[data-theme="midnight"] .hero-loop .next-word b {
    color: var(--ink);
}


html[data-theme="midnight"] .horizontal-accordion details:nth-child(1) {
    background: var(--paper-light);
    color: var(--ink);
}


html[data-theme="midnight"] .horizontal-accordion details:nth-child(2) {
    background: var(--paper);
    color: var(--ink);
}


html[data-theme="midnight"] .horizontal-accordion details:nth-child(3) {
    background: var(--ink);
    color: var(--paper-light);
}


html[data-theme="midnight"] .toast,
html[data-theme="midnight"] .return-today-button {
    background: var(--paper-light);
    color: var(--ink);
}

body:has(.history-dialog[open]), body:has(.practice-dialog[open]), body:has(.shortcuts-dialog[open]) { overflow: hidden; }

.usage-context { margin-top: 32px; padding: 18px 20px; border-block: 1px solid var(--line-dark); background: var(--paper-light); }

.usage-context .reading-label { margin: 0 0 10px; }

.usage-context p:not(.reading-label) { margin: 0; line-height: 1.75; }

.usage-context [lang="en"] { margin-top: 8px !important; color: var(--ink-soft); font-family: var(--sans); text-align: left; }

.inline-review-button { width: 100%; min-height: 44px; margin-top: 18px; padding: 10px 14px; border: 1px solid var(--line-dark); background: var(--ink); color: var(--paper-light); font: 600 .82rem var(--sans); cursor: pointer; }

.inline-review-button:hover { background: var(--ink-soft); }

.inline-review-button:focus-visible { outline: 3px solid var(--lime); outline-offset: 3px; }

/* ponytail: physical left/right anchoring here is deliberate (aligns dropdown
   with the page content edge in RTL) and pinned by tests/lexicon.test.js. */
.home-menu-dropdown,
.word-menu-dropdown { left: max(20px, calc((100vw - 1180px) / 2)); right: auto; width: min(320px, calc(100vw - 40px)); display: grid; gap: 6px; }

.home-menu-dropdown .nav-explorer-link,
.home-menu-dropdown .due-review-badge,
.home-menu-dropdown .streak-badge { width: 100%; justify-content: flex-start; color: var(--ink); border-color: var(--line-dark); }

.home-menu-dropdown .nav-explorer-link { min-height: 44px; }

.home-menu-theme { display: grid; gap: 6px; padding: 8px 12px; color: var(--ink); font: 600 .78rem var(--sans); }

.home-menu-theme .theme-select { width: 100%; background: var(--paper-light); border-color: var(--line-dark); color: var(--ink); }

.word-menu-dropdown .due-review-badge,
.word-menu-dropdown .streak-badge,
.word-menu-dropdown #btn-toggle-history { width: 100%; justify-content: flex-start; color: var(--ink); border-color: var(--line-dark); }

.word-menu-dropdown #btn-toggle-history { display: flex; min-width: 0; padding: 10px 12px; }

.word-menu-dropdown #btn-toggle-history .badge { position: static; margin-inline-start: auto; }

.word-menu-theme { display: grid; gap: 6px; padding: 8px 12px; color: var(--ink); font: 600 .78rem var(--sans); }

.completion-banner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-block-start: 12px;
    padding: 14px 16px;
    border: 1px solid var(--accent-border);
    background: var(--paper-light);
    color: var(--ink);
    font: 500 .85rem var(--sans);
}

.history-stats-row {
    margin: 0 0 12px;
    color: var(--ink-soft);
    font: 500 .8rem var(--sans);
}

.word-menu-theme .install-button,
#btn-toggle-reminder { min-height: 44px; width: 100%; padding: 10px 12px; background: var(--paper-light); border: 1px solid var(--line-dark); color: var(--ink); font: 600 .78rem var(--sans); cursor: pointer; text-align: start; }
#btn-toggle-reminder[aria-pressed="true"] { border-color: var(--accent-border); }

.word-menu-theme .theme-select { width: 100%; background: var(--paper-light); border-color: var(--line-dark); color: var(--ink); }

.menu-divider { width: 100%; height: 1px; margin: 4px 0; border: 0; background: var(--line-dark); }


.card-front-flip {
    align-self: flex-start;
    margin-bottom: 10px;
    padding: 8px 16px;
    border: 1px solid var(--line-dark);
    border-radius: 999px;
    background: var(--ink);
    color: var(--paper-light);
    font: 600 .8rem var(--sans);
}


.card-front-flip:hover {
    background: var(--ink-soft);
}


@media (max-width: 720px) {
    .home-menu-dropdown,
    .word-menu-dropdown { inset-inline: 14px; width: auto; min-width: 0; }
}

/* The archived website keeps its own data and export controls. */
.legacy-notice { margin: 24px 0; padding: 18px 24px; border: 1px solid var(--line); color: var(--ink); background: var(--paper); font-size: 18px; line-height: 1.8; }
.legacy-notice p { margin: 0 0 8px; }
.legacy-notice a { color: inherit; text-underline-offset: 4px; }