/* Base24 Coder Tool — production stylesheet (logical properties for automatic RTL). */

:root {
    --bg: #f5f7fb;
    --surface: #ffffff;
    --surface-2: #f1f4f9;
    --surface-3: #e8ecf4;
    --border: #e0e5ee;
    --border-strong: #c9d1e0;
    --text: #0f172a;
    --muted: #526079;
    --primary: #3b5bdb;
    --primary-strong: #2a45b5;
    --primary-soft: #e8edff;
    --on-primary: #ffffff;
    --accent: #c2410c;
    --success: #16a34a;
    --success-ink: #166534;
    --success-soft: #e6f6eb;
    --warning: #d97706;
    --warning-ink: #8a3c0b;
    --warning-soft: #fdf3e2;
    --danger: #dc2626;
    --danger-ink: #b42318;
    --danger-soft: #fdeceb;
    --layer-char: #7c3aed;
    --layer-byte: #0891b2;
    --layer-block: #d97706;
    --layer-symbol: #3b5bdb;
    --radius-lg: 16px;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow-sm: 0 1px 2px rgb(15 23 42 / 6%);
    --shadow: 0 1px 2px rgb(15 23 42 / 5%), 0 6px 20px -6px rgb(15 23 42 / 10%);
    --shadow-lg: 0 2px 4px rgb(15 23 42 / 4%), 0 18px 40px -12px rgb(15 23 42 / 18%);
    --header-h: 64px;
    --ease: cubic-bezier(.2, .7, .3, 1);
    --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif;
    --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
    color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0b1020;
        --surface: #121a2e;
        --surface-2: #172038;
        --surface-3: #1e2944;
        --border: #253150;
        --border-strong: #34416a;
        --text: #e8ebf4;
        --muted: #9ba6c1;
        --primary: #7b93ff;
        --primary-strong: #a5b5ff;
        --primary-soft: #1d2852;
        --on-primary: #0b1020;
        --accent: #fbbf5a;
        --success: #34c46c;
        --success-ink: #6ee7a0;
        --success-soft: #10291c;
        --warning: #f0a429;
        --warning-ink: #fcd27a;
        --warning-soft: #2e230e;
        --danger: #f26b6b;
        --danger-ink: #fca5a5;
        --danger-soft: #361617;
        --layer-symbol: #7b93ff;
        --shadow-sm: 0 1px 2px rgb(0 0 0 / 30%);
        --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 8px 24px -8px rgb(0 0 0 / 45%);
        --shadow-lg: 0 2px 4px rgb(0 0 0 / 30%), 0 20px 44px -12px rgb(0 0 0 / 60%);
    }
}

/* Script-aware font stacks: each language gets its native UI face. */
:lang(ar) { --font: "Noto Sans Arabic", "SF Arabic", "Geeza Pro", "Segoe UI", Tahoma, sans-serif; }
:lang(ur) { --font: "Noto Nastaliq Urdu", "Jameel Noori Nastaleeq", "Urdu Typesetting", "Noto Sans Arabic", "Geeza Pro", Tahoma, serif; }
:lang(hi) { --font: "Noto Sans Devanagari", "Kohinoor Devanagari", "Nirmala UI", system-ui, sans-serif; }
:lang(bn) { --font: "Noto Sans Bengali", "Kohinoor Bangla", "Bangla Sangam MN", "Nirmala UI", system-ui, sans-serif; }
:lang(ja) { --font: system-ui, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", Meiryo, "Noto Sans JP", sans-serif; }
:lang(ko) { --font: system-ui, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif; }
:lang(zh-Hans) { --font: system-ui, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif; }
:lang(zh-Hant) { --font: system-ui, "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", sans-serif; }
[lang] { font-family: var(--font); }

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-block-start: calc(var(--header-h) + 16px); }

body {
    margin: 0;
    min-block-size: 100vh;
    display: flex;
    flex-direction: column;
    background:
        radial-gradient(1100px 420px at 50% -160px, color-mix(in srgb, var(--primary) 14%, transparent), transparent 70%) no-repeat,
        var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

[dir="rtl"] body { line-height: 1.8; }
:lang(ur) body { line-height: 2.1; }

a { color: var(--primary); text-underline-offset: 3px; }
a:hover { color: var(--primary-strong); }

h1, h2, h3 { line-height: 1.25; margin-block: 0 .5em; text-wrap: balance; }
h1 { font-size: clamp(1.75rem, 1.2rem + 2.4vw, 2.6rem); font-weight: 800; letter-spacing: -.025em; }
h2 { font-size: 1.15rem; letter-spacing: -.01em; }
h3 { font-size: 1rem; }
:lang(ar) h1, :lang(ur) h1, :lang(hi) h1, :lang(bn) h1 { letter-spacing: 0; line-height: 1.5; }

p { text-wrap: pretty; }

.container { inline-size: min(1200px, 100% - 32px); margin-inline: auto; }

.icon { inline-size: 1.15em; block-size: 1.15em; flex: none; vertical-align: -.2em; }
[dir="rtl"] .icon-flip { transform: scaleX(-1); }

.visually-hidden, .skip-link:not(:focus) {
    position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.skip-link:focus { position: fixed; inset-block-start: 8px; inset-inline-start: 8px; z-index: 100; background: var(--surface); color: var(--text); padding: 10px 14px; border-radius: var(--radius-sm); box-shadow: var(--shadow-lg); }

:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

.muted { color: var(--muted); }
.small { font-size: .85rem; }
.mono { font-family: var(--mono); }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: .75rem; font-weight: 600; color: var(--muted); margin: 0; }
.lead { font-size: 1.08rem; color: var(--muted); max-inline-size: 68ch; margin-block: 0; }

/* Header ------------------------------------------------------------ */

.site-header {
    position: sticky; inset-block-start: 0; z-index: 30;
    background: color-mix(in srgb, var(--surface) 82%, transparent);
    backdrop-filter: saturate(1.6) blur(14px);
    -webkit-backdrop-filter: saturate(1.6) blur(14px);
    border-block-end: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 20px; min-block-size: var(--header-h); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 750; letter-spacing: -.01em; white-space: nowrap; }
.brand:hover { color: var(--text); }
.brand-mark {
    display: inline-grid; place-items: center; inline-size: 34px; block-size: 34px; border-radius: 10px; flex: none;
    background: linear-gradient(140deg, color-mix(in srgb, var(--primary) 75%, #fff), var(--primary) 55%, var(--primary-strong));
    color: var(--on-primary); font-family: var(--mono); font-size: .9rem; font-weight: 700;
    box-shadow: inset 0 1px 0 rgb(255 255 255 / 25%), 0 2px 8px -2px color-mix(in srgb, var(--primary) 60%, transparent);
}
.site-nav { display: flex; align-items: center; gap: 2px; flex: 1; min-inline-size: 0; }
.site-nav a {
    display: inline-flex; align-items: center; gap: 6px; padding: 7px 11px; border-radius: var(--radius-sm);
    text-decoration: none; color: var(--muted); font-size: .92rem; font-weight: 500; white-space: nowrap;
    transition: background-color .15s var(--ease), color .15s var(--ease);
}
.site-nav a:hover { background: var(--surface-2); color: var(--text); }
.site-nav a.active { background: var(--primary-soft); color: var(--primary-strong); font-weight: 600; }
.site-nav .nav-premium { color: var(--primary); font-weight: 600; margin-inline-start: auto; }
.site-nav .nav-premium .icon { inline-size: 1em; block-size: 1em; }
.header-actions { display: flex; align-items: center; gap: 8px; margin-inline-start: auto; }
.header-actions form { margin: 0; }
.nav-toggle {
    display: none; place-items: center; inline-size: 40px; block-size: 40px; padding: 0; cursor: pointer;
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text);
}
.nav-toggle .icon { inline-size: 20px; block-size: 20px; }
.nav-toggle .icon-close, .nav-toggle[aria-expanded="true"] .icon-open { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

.lang-switcher { position: relative; }
.lang-switcher summary {
    list-style: none; cursor: pointer; display: flex; gap: 6px; align-items: center; min-block-size: 36px;
    padding: 6px 10px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface);
    font-size: .9rem; color: var(--text); transition: border-color .15s var(--ease), background-color .15s var(--ease);
}
.lang-switcher summary:hover { border-color: var(--border-strong); background: var(--surface-2); }
.lang-switcher summary::-webkit-details-marker { display: none; }
.lang-switcher .icon { color: var(--muted); }
.lang-switcher .icon-caret { inline-size: 14px; block-size: 14px; transition: transform .2s var(--ease); }
.lang-switcher[open] .icon-caret { transform: rotate(180deg); }
.lang-menu {
    position: absolute; inset-inline-end: 0; inset-block-start: calc(100% + 8px); z-index: 40;
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-lg);
    padding: 6px; margin: 0; list-style: none; display: grid; grid-template-columns: repeat(2, minmax(150px, 1fr)); gap: 2px;
    animation: pop-in .14s var(--ease);
}
.lang-menu a { display: block; padding: 8px 12px; border-radius: 6px; text-decoration: none; color: var(--text); font-size: .92rem; }
.lang-menu a:hover { background: var(--surface-2); }
.lang-menu a.active { background: var(--primary-soft); color: var(--primary-strong); font-weight: 600; }

@keyframes pop-in { from { opacity: 0; transform: translateY(-4px); } }

/* Layout ------------------------------------------------------------ */

.main-layout { flex: 1; display: grid; grid-template-columns: minmax(0, 1fr); gap: 28px; padding-block: 32px 64px; }
body:has(.main-aside) .main-layout { grid-template-columns: minmax(0, 1fr) 300px; }
.main-aside { position: sticky; inset-block-start: calc(var(--header-h) + 20px); align-self: start; }
.tool-hero { padding-block: 4px 24px; display: flex; flex-direction: column; gap: 12px; }
.tool-hero h1 { margin: 0; }
.tool-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
    box-shadow: var(--shadow); padding: 20px; margin-block-end: 28px;
}
.stack { display: flex; flex-direction: column; gap: 10px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }

.hero-points { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.hero-points li {
    display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px 4px 10px; border-radius: 999px;
    background: var(--surface); border: 1px solid var(--border); font-size: .82rem; font-weight: 500; color: var(--muted);
}
.hero-points .icon { color: var(--primary); inline-size: 15px; block-size: 15px; }

.alphabet { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; margin-block-start: 6px; }
.alphabet-label { font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
:lang(ar) .alphabet-label, :lang(ur) .alphabet-label, :lang(hi) .alphabet-label, :lang(bn) .alphabet-label,
:lang(ja) .alphabet-label, :lang(ko) .alphabet-label, :lang(zh-Hans) .alphabet-label, :lang(zh-Hant) .alphabet-label { text-transform: none; letter-spacing: 0; font-size: .82rem; }
.alphabet-symbols { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(24, 28px); gap: 4px; }
.alphabet-symbols li {
    display: grid; place-items: center; block-size: 32px; border-radius: 6px;
    background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-sm);
    font-family: var(--mono); font-size: .85rem; font-weight: 700; color: var(--primary-strong);
}
.alphabet-symbols li.is-digit { color: var(--accent); }

/* Controls ---------------------------------------------------------- */

.toolbar { display: flex; flex-wrap: wrap; gap: 10px 14px; align-items: center; margin-block-end: 14px; }
.workspace > .toolbar {
    margin: -20px -20px 18px; padding: 12px 20px; background: var(--surface-2);
    border-block-end: 1px solid var(--border); border-start-start-radius: var(--radius-lg); border-start-end-radius: var(--radius-lg);
}
.workspace > .toolbar .segmented { margin: 0; background: var(--surface-3); }
.field-inline { display: inline-flex; align-items: center; gap: 8px; font-size: .88rem; color: var(--muted); }
select, .input {
    font: inherit; font-size: .92rem; color: var(--text); background-color: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 7px 10px; min-block-size: 38px;
    transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
select { cursor: pointer; }
select:hover, .input:hover { border-color: var(--border-strong); }
select:focus-visible, .input:focus { border-color: var(--primary); outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 22%, transparent); }
.input { inline-size: 100%; max-inline-size: 420px; }
.checkbox { display: flex; gap: 8px; align-items: center; cursor: pointer; }
.checkbox input { inline-size: 16px; block-size: 16px; accent-color: var(--primary); }

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 7px; font: inherit; font-size: .94rem; font-weight: 600;
    border-radius: var(--radius-sm); border: 1px solid transparent; padding: 8px 16px; cursor: pointer; text-decoration: none;
    min-block-size: 40px; white-space: nowrap;
    transition: background-color .15s var(--ease), border-color .15s var(--ease), color .15s var(--ease), box-shadow .15s var(--ease);
}
.btn .icon { inline-size: 16px; block-size: 16px; }
.btn-sm { padding: 5px 12px; min-block-size: 34px; font-size: .86rem; gap: 6px; }
.btn-sm .icon { inline-size: 15px; block-size: 15px; }
.btn-lg { min-block-size: 48px; font-size: 1rem; }
.btn-block { inline-size: 100%; }
.btn-primary { background: var(--primary); color: var(--on-primary); box-shadow: 0 1px 2px rgb(15 23 42 / 12%), inset 0 1px 0 rgb(255 255 255 / 14%); }
.btn-primary:hover { background: var(--primary-strong); color: var(--on-primary); }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--surface-2); border-color: var(--border-strong); color: var(--text); }
.btn[disabled], .btn.is-loading { opacity: .65; pointer-events: none; }
.btn.is-loading::before {
    content: ""; inline-size: 14px; block-size: 14px; border-radius: 50%;
    border: 2px solid currentColor; border-inline-end-color: transparent; animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.segmented { display: inline-flex; background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; padding: 3px; gap: 2px; margin-block-end: 14px; }
.segmented button, .segmented label {
    font: inherit; font-size: .92rem; font-weight: 500; border: 0; background: transparent; color: var(--muted);
    padding: 6px 16px; min-block-size: 34px; border-radius: 7px; cursor: pointer; display: inline-flex; gap: 6px; align-items: center;
    transition: background-color .15s var(--ease), color .15s var(--ease);
}
.segmented button:hover, .segmented label:hover { color: var(--text); }
.segmented button[aria-selected="true"], .segmented label:has(input:checked) { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm), 0 0 0 1px var(--border); font-weight: 650; }
.segmented input { accent-color: var(--primary); margin: 0; }

.panes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.pane { display: flex; flex-direction: column; gap: 8px; min-inline-size: 0; }
.pane-label { font-weight: 650; font-size: .88rem; }
.pane-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-block: 4px; }
.code-area {
    inline-size: 100%; font-family: var(--mono); font-size: .95rem; line-height: 1.55; color: var(--text);
    background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius);
    padding: 14px; resize: vertical; min-block-size: 140px; overflow-wrap: anywhere;
    transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
.code-area::placeholder { color: color-mix(in srgb, var(--muted) 80%, transparent); }
.code-area.output { background: color-mix(in srgb, var(--primary-soft) 55%, var(--surface)); border-color: color-mix(in srgb, var(--primary) 25%, var(--border)); }
.code-area:focus { border-color: var(--primary); outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent); }
.rtl-input { font-family: var(--font); font-size: 1.1rem; }

.status-bar {
    display: flex; flex-wrap: wrap; align-items: center; gap: 6px 20px; margin-block-start: 14px; padding-block-start: 12px;
    border-block-start: 1px dashed var(--border); font-size: .84rem; color: var(--muted); font-variant-numeric: tabular-nums;
}
.live-dot { display: inline-flex; align-items: center; gap: 8px; color: var(--success-ink); font-weight: 600; margin-inline-start: auto; }
.live-pulse { position: relative; inline-size: 8px; block-size: 8px; border-radius: 50%; background: var(--success); }
.live-pulse::after { content: ""; position: absolute; inset: -4px; border-radius: 50%; border: 2px solid var(--success); opacity: 0; animation: pulse 2s var(--ease) infinite; }
@keyframes pulse { 0% { opacity: .7; transform: scale(.5); } 100% { opacity: 0; transform: scale(1.4); } }

.notice { border-radius: var(--radius-sm); padding: 10px 14px; margin-block: 12px; font-size: .92rem; border: 1px solid transparent; }
.notice-success { background: var(--success-soft); color: var(--success-ink); border-color: color-mix(in srgb, var(--success) 25%, transparent); }
.notice-warning { background: var(--warning-soft); color: var(--warning-ink); border-color: color-mix(in srgb, var(--warning) 25%, transparent); }
.notice-error { background: var(--danger-soft); color: var(--danger-ink); border-color: color-mix(in srgb, var(--danger) 25%, transparent); }
.notice a { color: inherit; font-weight: 600; }
.field-error { color: var(--danger-ink); font-size: .85rem; margin: 0; }
.quota-note { font-size: .85rem; color: var(--muted); margin: 0; }

.link-arrow { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; font-size: .9rem; text-decoration: none; }
.link-arrow:hover { text-decoration: underline; }
.link-arrow .icon { inline-size: 15px; block-size: 15px; }

/* Panels / results -------------------------------------------------- */

.dev-panels { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; margin-block-start: 16px; }
.dev-panels:not(:has(> .panel:not([hidden]))) { display: none; }
.panel { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; min-inline-size: 0; }
.panel h2 { font-size: .95rem; }
.results { margin-block-start: 18px; display: flex; flex-direction: column; gap: 16px; }
.result-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; align-items: center; }
.result-title { font-size: 1.2rem; font-weight: 700; margin: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font-size: .78rem; font-weight: 600; padding: 3px 10px; border-radius: 999px; background: var(--primary-soft); color: var(--primary-strong); }
.chip-danger { background: var(--danger-soft); color: var(--danger-ink); }
.pattern-list { margin: 0; padding-inline-start: 18px; display: flex; flex-direction: column; gap: 12px; }
.pattern-list li strong { display: block; }
.score-bar { block-size: 5px; background: var(--border); border-radius: 3px; overflow: hidden; margin-block-start: 6px; }
.score-bar span { display: block; block-size: 100%; background: var(--primary); border-radius: inherit; }
.alternative { border-block-end: 1px dashed var(--border); padding-block: 10px; }
.alternative:last-child { border-block-end: 0; }
.alternative code { display: block; font-family: var(--mono); font-size: .82rem; overflow-wrap: anywhere; color: var(--muted); margin-block-start: 4px; }
.explanation h3 { margin-block-start: 14px; }
.explanation ul { margin: 0; padding-inline-start: 18px; }
.byte-grid { display: flex; flex-wrap: wrap; gap: 4px; font-family: var(--mono); font-size: .78rem; max-block-size: 220px; overflow: auto; }
.byte-grid span { padding: 2px 6px; border-radius: 4px; background: var(--surface); border: 1px solid var(--border); }
.byte-grid span.pad { color: var(--muted); border-style: dashed; }
.byte-grid span.block-start { border-inline-start: 3px solid var(--layer-block); }
.history-mini { list-style: none; margin: 0 0 10px; padding: 0; display: flex; flex-direction: column; gap: 6px; font-size: .85rem; }
.history-mini li { display: flex; justify-content: space-between; gap: 10px; padding: 6px 10px; background: var(--surface); border: 1px solid var(--border); border-radius: 6px; }
.history-mini li.muted { justify-content: flex-start; background: transparent; border-style: dashed; }
.history-mini code { font-family: var(--mono); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-inline-size: 0; direction: ltr; text-align: start; }

.gauges { display: flex; flex-wrap: wrap; gap: 24px; align-items: center; }
.gauge { position: relative; inline-size: 128px; block-size: 128px; }
.gauge svg { transform: rotate(-90deg); inline-size: 100%; block-size: 100%; }
.gauge-track { fill: none; stroke: var(--border); stroke-width: 10; }
.gauge-value { fill: none; stroke: var(--success); stroke-width: 10; stroke-linecap: round; stroke-dasharray: 327; stroke-dashoffset: 327; transition: stroke-dashoffset .6s var(--ease); }
.gauge.warn .gauge-value { stroke: var(--warning); }
.gauge.bad .gauge-value { stroke: var(--danger); }
.gauge-label { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.gauge-label strong { font-size: 1.6rem; font-variant-numeric: tabular-nums; }
.gauge-label span { font-size: .75rem; color: var(--muted); }
.facts { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; margin: 0; font-size: .9rem; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; font-weight: 600; overflow-wrap: anywhere; }
.issue-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.issue-list li { padding: 8px 12px; border-radius: 6px; border-inline-start: 3px solid var(--warning); background: var(--surface); font-size: .9rem; }
.issue-list li.error { border-inline-start-color: var(--danger); }
.issue-list li.ok { border-inline-start-color: var(--success); }

.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.data-table { inline-size: 100%; border-collapse: collapse; font-size: .88rem; }
.data-table th, .data-table td { text-align: start; padding: 9px 12px; border-block-end: 1px solid var(--border); vertical-align: top; }
.data-table tr:last-child td { border-block-end: 0; }
.data-table td code, .data-table td.mono { font-family: var(--mono); overflow-wrap: anywhere; }
.data-table th { color: var(--muted); font-weight: 600; background: var(--surface-2); font-size: .8rem; }
.data-table tbody tr:hover { background: color-mix(in srgb, var(--surface-2) 60%, transparent); }
.status-ok { color: var(--success-ink); font-weight: 600; }
.status-error { color: var(--danger-ink); font-weight: 600; }
.status-binary { color: var(--warning-ink); font-weight: 600; }

.batch-columns { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 16px; }
.batch-columns .pane-label { display: block; margin-block-end: 8px; }
.dropzone {
    border: 2px dashed var(--border-strong); border-radius: var(--radius); padding: 20px; background: var(--surface-2);
    display: flex; flex-direction: column; gap: 10px; justify-content: center; align-items: center; text-align: center;
    transition: border-color .15s var(--ease), background-color .15s var(--ease);
}
.dropzone label { font-weight: 650; }
.dropzone input[type="file"] { max-inline-size: 100%; font: inherit; font-size: .85rem; color: var(--muted); }
.dropzone input[type="file"]::file-selector-button {
    font: inherit; font-weight: 600; margin-inline-end: 10px; padding: 6px 12px; border-radius: var(--radius-sm);
    border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer;
}
.dropzone.is-over { border-color: var(--primary); background: var(--primary-soft); }

/* Graph -------------------------------------------------------------- */

.graph-canvas { position: relative; inline-size: 100%; min-block-size: 360px; background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius); overflow: auto; }
.graph-canvas svg { display: block; direction: ltr; }
.graph-canvas text { font-family: var(--mono); font-size: 11px; fill: var(--text); pointer-events: none; }
.graph-canvas .edge { stroke: var(--border-strong); stroke-width: 1.2; fill: none; }
.graph-canvas .edge.is-active { stroke: var(--primary); stroke-width: 2; }
.graph-canvas .node { cursor: pointer; }
.graph-canvas .node:focus-visible { outline: none; }
.graph-canvas .node:focus-visible rect { stroke-width: 3; }
.graph-canvas .node-char rect { fill: color-mix(in srgb, var(--layer-char) 18%, var(--surface)); stroke: var(--layer-char); }
.graph-canvas .node-byte rect { fill: color-mix(in srgb, var(--layer-byte) 18%, var(--surface)); stroke: var(--layer-byte); }
.graph-canvas .node-padding rect { fill: var(--surface); stroke: var(--muted); stroke-dasharray: 3 2; }
.graph-canvas .node-block rect { fill: color-mix(in srgb, var(--layer-block) 18%, var(--surface)); stroke: var(--layer-block); }
.graph-canvas .node-symbol rect { fill: color-mix(in srgb, var(--layer-symbol) 18%, var(--surface)); stroke: var(--layer-symbol); }
.graph-canvas .node.is-dim { opacity: .25; }
.graph-canvas .sim-node circle { fill: var(--primary-soft); stroke: var(--primary); stroke-width: 2; }
.graph-legend { display: flex; flex-wrap: wrap; gap: 16px; font-size: .82rem; margin-block: 12px; color: var(--muted); }
.legend-item::before { content: ""; display: inline-block; inline-size: 10px; block-size: 10px; border-radius: 3px; margin-inline-end: 6px; vertical-align: middle; }
.legend-char::before { background: var(--layer-char); }
.legend-byte::before { background: var(--layer-byte); }
.legend-block::before { background: var(--layer-block); }
.legend-symbol::before { background: var(--layer-symbol); }
.bars { display: flex; flex-direction: column; gap: 4px; font-family: var(--mono); font-size: .8rem; }
.bar { display: grid; grid-template-columns: 24px 1fr 40px; gap: 8px; align-items: center; }
.bar-fill { block-size: 10px; background: var(--layer-symbol); border-radius: 3px; }

/* History ----------------------------------------------------------- */

.history-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; align-items: start; }
.history-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.history-item {
    border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 12px; background: var(--surface); cursor: pointer;
    display: grid; gap: 4px; text-align: start; font: inherit; color: inherit; inline-size: 100%;
    transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
.history-item:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.history-item[aria-current="true"] { border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 15%, transparent); }
.history-item code { font-family: var(--mono); font-size: .82rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; unicode-bidi: plaintext; }
.history-meta { display: flex; gap: 10px; font-size: .78rem; color: var(--muted); flex-wrap: wrap; }
.history-detail { position: sticky; inset-block-start: calc(var(--header-h) + 16px); }
.version-timeline { list-style: none; margin: 0; padding: 0; border-inline-start: 2px solid var(--border); }
.version-timeline li { position: relative; padding-inline-start: 16px; padding-block-end: 14px; }
.version-timeline li::before { content: ""; position: absolute; inset-inline-start: -7px; inset-block-start: 6px; inline-size: 12px; block-size: 12px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 3px var(--surface-2); }
.version-timeline li:last-child::before { display: none; }
.version-timeline code { display: block; font-family: var(--mono); font-size: .8rem; overflow-wrap: anywhere; }
.diff-removed { background: var(--danger-soft); color: var(--danger-ink); text-decoration: line-through; }
.diff-added { background: var(--success-soft); color: var(--success-ink); }

/* Marketing sections ------------------------------------------------ */

.section-title { font-size: clamp(1.25rem, 1rem + 1vw, 1.6rem); font-weight: 750; letter-spacing: -.02em; margin-block-end: 16px; }
.features { margin-block: 40px; }
.features h2, .faq h2 { font-size: clamp(1.25rem, 1rem + 1vw, 1.6rem); font-weight: 750; letter-spacing: -.02em; margin-block-end: 18px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.feature-card {
    position: relative; display: flex; flex-direction: column; gap: 6px; background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px 20px 22px; text-decoration: none; color: var(--text);
    transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.feature-card:hover { border-color: color-mix(in srgb, var(--primary) 45%, var(--border)); box-shadow: var(--shadow); color: var(--text); }
.feature-card h3 { margin: 6px 0 0; font-size: 1rem; }
.feature-card p { color: var(--muted); margin: 0; font-size: .9rem; padding-inline-end: 20px; }
.feature-icon { display: grid; place-items: center; inline-size: 40px; block-size: 40px; border-radius: 10px; background: var(--primary-soft); color: var(--primary); }
.feature-icon .icon { inline-size: 20px; block-size: 20px; }
.feature-arrow { position: absolute; inset-block-start: 22px; inset-inline-end: 20px; inline-size: 18px; block-size: 18px; color: var(--muted); transition: color .2s var(--ease), translate .2s var(--ease); }
.feature-card:hover .feature-arrow { color: var(--primary); translate: 3px 0; }
[dir="rtl"] .feature-card:hover .feature-arrow { translate: -3px 0; }

.faq { margin-block: 40px 8px; }
.faq-list { display: flex; flex-direction: column; gap: 8px; max-inline-size: 860px; }
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); transition: border-color .15s var(--ease), box-shadow .15s var(--ease); }
.faq details[open] { border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.faq summary { list-style: none; cursor: pointer; font-weight: 650; padding: 14px 18px; display: flex; align-items: center; justify-content: space-between; gap: 16px; border-radius: inherit; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--primary-strong); }
.faq-caret { inline-size: 18px; block-size: 18px; color: var(--muted); transition: transform .2s var(--ease); }
.faq details[open] .faq-caret { transform: rotate(180deg); }
.faq details p { margin: 0; padding: 0 18px 16px; color: var(--muted); max-inline-size: 75ch; }

.pricing { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; margin-block-end: 28px; }
.plan { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px; box-shadow: var(--shadow-sm); display: flex; flex-direction: column; }
.plan h2 { display: flex; align-items: center; gap: 8px; font-size: 1.05rem; }
.plan-featured {
    border: 2px solid transparent; box-shadow: var(--shadow-lg);
    background: linear-gradient(var(--surface), var(--surface)) padding-box, linear-gradient(140deg, var(--primary), color-mix(in srgb, var(--primary) 30%, #a855f7)) border-box;
}
.plan-featured h2 .icon { color: var(--primary); }
.plan .checklist { flex: 1; }
.price { font-size: 2.4rem; font-weight: 800; letter-spacing: -.03em; margin: 0 0 16px; font-variant-numeric: tabular-nums; }
.price span { font-size: .9rem; font-weight: 500; letter-spacing: 0; color: var(--muted); }
.checklist { list-style: none; padding: 0; margin: 0 0 20px; display: flex; flex-direction: column; gap: 10px; }
.checklist li { display: flex; gap: 10px; align-items: flex-start; }
.checklist li::before {
    content: ""; flex: none; inline-size: 18px; block-size: 18px; margin-block-start: .2em; border-radius: 50%;
    background: var(--success-soft) center / 12px no-repeat;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2316a34a' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
}
.redeem h2 { font-size: 1.05rem; }
.redeem .toolbar { margin: 0; }

.auth-card { inline-size: 100%; max-inline-size: 440px; margin: 16px auto 0; padding: 32px; }
.auth-card .stack { gap: 8px; }
.auth-card .stack label:not(.checkbox) { font-weight: 600; font-size: .9rem; margin-block-start: 6px; }
.auth-card .input { max-inline-size: none; min-block-size: 44px; }
.auth-card .btn { margin-block-start: 10px; min-block-size: 44px; }
.auth-card > .muted { margin-block: 18px 0; text-align: center; font-size: .92rem; }
.auth-mark { inline-size: 44px; block-size: 44px; border-radius: 12px; font-size: 1.05rem; margin-block-end: 14px; }
.auth-card h1 { font-size: 1.6rem; }

.not-found { align-items: center; text-align: center; padding-block: 72px; }
.not-found .lead { margin-inline: auto; }
.not-found .btn { margin-block-start: 12px; }
.not-found-code {
    margin: 0; font-family: var(--mono); font-weight: 800; font-size: clamp(4rem, 3rem + 6vw, 7rem); line-height: 1; letter-spacing: -.04em;
    background: linear-gradient(160deg, var(--primary), color-mix(in srgb, var(--primary) 35%, var(--bg)));
    -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* Ads ---------------------------------------------------------------- */

.ad-zone { position: relative; margin-block: 16px; min-block-size: 100px; text-align: center; contain: layout; }
.ad-zone-header, .ad-zone-footer { inline-size: min(1200px, 100% - 32px); margin-inline: auto; min-block-size: 90px; }
.ad-zone-sidebar { min-block-size: 600px; }
.ad-zone-mobile_sticky { position: fixed; inset-inline: 0; inset-block-end: 0; margin: 0; min-block-size: 60px; background: var(--surface); border-block-start: 1px solid var(--border); z-index: 40; }
.ad-label { display: block; font-size: .7rem; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.ad-close { position: absolute; inset-block-start: 0; inset-inline-end: 0; display: grid; place-items: center; inline-size: 36px; block-size: 36px; background: none; border: 0; font-size: 1.3rem; color: var(--muted); cursor: pointer; }
.adblock-prompt { position: fixed; inset-block-end: 16px; inset-inline-end: 16px; max-inline-size: min(360px, 100% - 32px); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 18px; z-index: 50; }
.adblock-prompt h2 { font-size: 1rem; }
.adblock-prompt p { margin-block: 0 12px; color: var(--muted); font-size: .92rem; }
.adblock-prompt .actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* Footer / toasts --------------------------------------------------- */

.site-footer { border-block-start: 1px solid var(--border); background: var(--surface); padding-block: 40px 20px; font-size: .92rem; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) minmax(0, 1.8fr); gap: 32px; }
.footer-about p { margin-block: 12px 0; max-inline-size: 36ch; }
.footer-title { margin: 0 0 12px; font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
:lang(ar) .footer-title, :lang(ur) .footer-title, :lang(hi) .footer-title, :lang(bn) .footer-title,
:lang(ja) .footer-title, :lang(ko) .footer-title, :lang(zh-Hans) .footer-title, :lang(zh-Hant) .footer-title { text-transform: none; letter-spacing: 0; font-size: .85rem; }
.footer-nav ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px 16px; }
.footer-nav ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.footer-languages ul { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.footer-nav a { display: inline-block; padding-block: 4px; color: var(--muted); text-decoration: none; }
.footer-nav a:hover { color: var(--text); text-decoration: underline; }
.footer-nav a[aria-current] { color: var(--text); font-weight: 600; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 20px; margin-block-start: 32px; padding-block-start: 18px; border-block-start: 1px solid var(--border); font-size: .85rem; }
.footer-bottom p { margin: 0; }

.toast-region { position: fixed; inset-block-end: 20px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 8px; z-index: 60; pointer-events: none; }
.toast { background: var(--text); color: var(--bg); padding: 9px 18px; border-radius: 999px; font-size: .9rem; font-weight: 500; box-shadow: var(--shadow-lg); animation: toast-in .2s var(--ease); }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } }
body:has(.ad-zone-mobile_sticky) .toast-region { inset-block-end: 84px; }

/* Generative UI workspace modes ------------------------------------ */

body[data-workspace="casual"] .workspace [data-profile-field] { display: none; }
body[data-workspace="casual"] .workspace .code-area:not(.output) { font-family: var(--font); font-size: 1.05rem; }
body[data-workspace="developer"] .workspace .panes { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
body[data-workspace="developer"] .workspace .code-area { font-size: .88rem; }
body[data-workspace="bulk"] .workspace .panes { grid-template-columns: minmax(0, 1fr); }
body[data-workspace="bulk"] .workspace .code-area { min-block-size: 260px; }

/* Responsive -------------------------------------------------------- */

@media (max-width: 1180px) {
    .nav-toggle { display: grid; }
    .site-nav {
        display: none; position: absolute; inset-inline: 0; inset-block-start: 100%;
        background: var(--surface); border: 1px solid var(--border); border-block-start: 0; box-shadow: var(--shadow-lg);
        border-end-start-radius: var(--radius); border-end-end-radius: var(--radius); padding: 10px 12px 14px; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 4px;
        max-block-size: calc(100vh - var(--header-h)); overflow-y: auto;
    }
    .site-nav.is-open { display: grid; animation: pop-in .16s var(--ease); }
    .site-nav a { min-block-size: 44px; padding-inline: 12px; font-size: .98rem; }
    .site-nav .nav-premium { margin-inline-start: 0; }
    .header-inner { position: relative; }
}

@media (max-width: 1024px) {
    body:has(.main-aside) .main-layout { grid-template-columns: minmax(0, 1fr); }
    .main-aside { position: static; }
    .ad-zone-sidebar { min-block-size: 250px; }
    .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
    .footer-about { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
    .alphabet-symbols { grid-template-columns: repeat(12, minmax(0, 28px)); }
    .panes, .grid-2, .batch-columns, .history-layout { grid-template-columns: minmax(0, 1fr); }
    body[data-workspace="developer"] .workspace .panes { grid-template-columns: minmax(0, 1fr); }
    .history-detail { position: static; }
    .lang-menu { grid-template-columns: minmax(150px, 1fr); max-block-size: 60vh; overflow: auto; }
    body:has(.ad-zone-mobile_sticky) { padding-block-end: 70px; }
}

@media (max-width: 480px) {
    .alphabet { display: none; }
}

@media (max-width: 640px) {
    :root { --header-h: 58px; }
    .header-inner { gap: 10px; }
    .brand-name { display: none; }
    .header-actions { gap: 6px; }
    .main-layout { padding-block: 20px 48px; }
    .tool-card { padding: 16px; border-radius: var(--radius); }
    .workspace > .toolbar { margin: -16px -16px 16px; padding: 10px 16px; border-start-start-radius: var(--radius); border-start-end-radius: var(--radius); }
    .feature-grid { grid-template-columns: minmax(0, 1fr); }
    .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 24px; }
    .footer-languages ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .status-bar { gap: 4px 14px; }
    .plan { padding: 22px; }
    .auth-card { padding: 24px 20px; }
    .lead { font-size: 1rem; }
}

@media (pointer: coarse) {
    .btn-sm { min-block-size: 40px; }
    select, .input { min-block-size: 44px; }
    .segmented button, .segmented label { min-block-size: 40px; }
    .lang-switcher summary { min-block-size: 40px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}