:root {
    color-scheme: light dark;

    --bg: #faf9f7;
    --bg-elevated: #ffffff;
    --bg-subtle: #f4f1ec;
    --border: #ebe6dd;
    --border-strong: #d9d2c4;
    --text: #2b2620;
    --text-muted: #7a7266;
    --text-faint: #a69d8d;

    --accent: #6d5efc;
    --accent-hover: #5c4ff0;
    --accent-text: #ffffff;
    --accent-soft: #efecff;
    --accent-soft-border: #dcd6ff;

    --success: #15803d;
    --success-bg: #f0fdf4;
    --success-border: #bbf7d0;
    --warning: #b45309;
    --warning-bg: #fffbeb;
    --warning-border: #fde68a;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;
    --info: #2563eb;
    --info-bg: #eff6ff;
    --info-border: #bfdbfe;

    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 18px;

    --shadow-sm: 0 1px 2px rgba(43, 38, 32, 0.05);
    --shadow: 0 2px 8px rgba(43, 38, 32, 0.06), 0 1px 2px rgba(43, 38, 32, 0.04);
    --shadow-lg: 0 12px 32px rgba(43, 38, 32, 0.10);

    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Inter, Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'SF Mono', ui-monospace, 'Roboto Mono', Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #16141f;
        --bg-elevated: #1e1c2a;
        --bg-subtle: #262335;
        --border: #322e42;
        --border-strong: #423d58;
        --text: #f2f0f7;
        --text-muted: #a8a2bd;
        --text-faint: #746e8c;

        --accent: #9b8dff;
        --accent-hover: #ab9fff;
        --accent-text: #16141f;
        --accent-soft: #2a2540;
        --accent-soft-border: #3e3760;

        --success: #4ade80;
        --success-bg: #0f1f14;
        --success-border: #14532d;
        --warning: #fbbf24;
        --warning-bg: #221a08;
        --warning-border: #78350f;
        --danger: #f87171;
        --danger-bg: #23100f;
        --danger-border: #7f1d1d;
        --info: #60a5fa;
        --info-bg: #0e1a2b;
        --info-border: #1e3a8a;

        --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
        --shadow: 0 2px 8px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
    }
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

button, input {
    font-family: inherit;
}

a {
    color: inherit;
}

.icon {
    display: inline-block;
    vertical-align: middle;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.75;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-strong);
    border-top-color: var(--text);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    flex-shrink: 0;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--accent);
    color: var(--accent-text);
    box-shadow: 0 1px 2px rgba(43, 38, 32, 0.06);
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
}

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text);
    border-color: var(--border-strong);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-subtle);
    border-color: var(--text-faint);
}

/* ---- site layout ---- */

.page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: radial-gradient(680px circle at 50% 0%, var(--accent-soft) 0%, transparent 65%) no-repeat;
}

.wrap {
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

.top-bar {
    border-bottom: 1px solid var(--border);
}

.top-bar .wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-top: 18px;
    padding-bottom: 18px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
}

.top-nav {
    display: flex;
    gap: 20px;
    font-size: 0.875rem;
}

.top-nav a {
    color: var(--text-muted);
    text-decoration: none;
}

.top-nav a:hover,
.top-nav a[aria-current="page"] {
    color: var(--text);
}

.hero {
    padding: 72px 0 40px;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--accent-soft);
    border: 1px solid var(--accent-soft-border);
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: 2rem;
    font-weight: 650;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.hero-sub {
    margin: 12px auto 0;
    max-width: 520px;
    color: var(--text-muted);
}

@media (min-width: 640px) {
    .hero h1 { font-size: 2.5rem; }
}

main { flex: 1; }

section.block {
    padding: 40px 0;
}

section.block > .wrap > h2,
.prose h2 {
    font-size: 1.35rem;
    font-weight: 650;
    letter-spacing: -0.01em;
    margin-bottom: 8px;
}

.lead {
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* ---- tool grid ---- */

.tool-grid {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 14px;
}

.tool-grid > li { display: flex; }

.tool-tile {
    width: 100%;
    min-height: 170px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 18px;
    text-align: left;
    color: inherit;
    text-decoration: none;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.tool-tile:hover {
    border-color: var(--accent-soft-border);
    box-shadow: var(--shadow);
}

.tool-tile .icon-box {
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    border-radius: var(--radius-sm);
    background: var(--accent-soft);
    color: var(--accent);
}

.tool-tile h3 { font-size: 0.95rem; font-weight: 600; }
.tool-tile p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.45; flex: 1; }

.tile-note {
    font-size: 0.75rem;
    color: var(--text-faint);
    display: inline-flex;
    gap: 4px;
    align-items: center;
}

/* ---- prose (home sections, guides, legal) ---- */

.prose { max-width: 680px; }
.prose p, .prose li { color: var(--text-muted); line-height: 1.7; }
.prose p { margin-bottom: 14px; }
.prose h2 { margin-top: 36px; }
.prose h3 { font-size: 1.05rem; font-weight: 600; margin: 24px 0 6px; }
.prose ul, .prose ol { padding-left: 22px; margin-bottom: 14px; }
.prose li { margin-bottom: 6px; }
.prose a { color: var(--accent); }
.prose strong { color: var(--text); font-weight: 600; }
.prose code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 5px;
}
.prose table { width: 100%; border-collapse: collapse; font-size: 0.875rem; margin-bottom: 16px; }
.prose th, .prose td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); color: var(--text-muted); }
.prose th { color: var(--text); font-weight: 600; }

.page-head { padding: 56px 0 8px; }
.page-head h1 { font-size: 2rem; font-weight: 650; letter-spacing: -0.02em; }
.page-head p { color: var(--text-muted); margin-top: 8px; max-width: 560px; }

.toc { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 0; padding: 0; }
.toc a {
    display: block;
    padding: 6px 12px;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: none;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--bg-elevated);
}
.toc a:hover { color: var(--accent); border-color: var(--accent-soft-border); }

.faq details { border-bottom: 1px solid var(--border); padding: 14px 0; }
.faq summary { cursor: pointer; font-weight: 550; }
.faq details p { margin: 8px 0 0; color: var(--text-muted); }

.footer { border-top: 1px solid var(--border); margin-top: 40px; }
.footer .wrap {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px 24px;
    padding-top: 24px;
    padding-bottom: 24px;
    font-size: 0.8rem;
    color: var(--text-faint);
}
.footer nav { display: flex; gap: 16px; flex-wrap: wrap; }
.footer a { color: var(--text-muted); text-decoration: none; }
.footer a:hover { color: var(--accent); }

/* ---- forms (shared by tools and contact) ---- */

.field { display: flex; flex-direction: column; gap: 6px; }
.field > label, .label { font-size: 0.85rem; font-weight: 500; color: var(--text-muted); }

.input, .select, .textarea {
    width: 100%;
    padding: 11px 14px;
    font-size: 0.95rem;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--text);
}
.textarea { resize: vertical; min-height: 120px; font-family: inherit; }
.input:focus, .select:focus, .textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}
.input::placeholder, .textarea::placeholder { color: var(--text-faint); }

.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > .field { flex: 1; min-width: 160px; }

.btn-block { width: 100%; padding: 12px 18px; }

.message {
    display: none;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    border: 1px solid transparent;
}
.message.show { display: block; }
.message.error { background: var(--danger-bg); border-color: var(--danger-border); color: var(--danger); }
.message.success { background: var(--success-bg); border-color: var(--success-border); color: var(--success); }

.drop {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 28px 16px;
    text-align: center;
    border: 1.5px dashed var(--border-strong);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text-muted);
    font-size: 0.9rem;
    cursor: pointer;
    transition: border-color 0.15s ease, background-color 0.15s ease;
}
.drop:hover, .drop.over { border-color: var(--accent); background: var(--accent-soft); }
.drop strong { color: var(--text); font-weight: 550; }
.drop small { color: var(--text-faint); }
.drop input { display: none; }

.file-list { list-style: none; display: flex; flex-direction: column; gap: 6px; font-size: 0.85rem; }
.file-list li {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 12px;
    background: var(--bg-subtle);
    border-radius: var(--radius-sm);
}
.file-list span:last-child { color: var(--text-faint); white-space: nowrap; }

.progress { height: 8px; border-radius: 99px; background: var(--bg-subtle); border: 1px solid var(--border); overflow: hidden; }
.progress > div { height: 100%; width: 0; background: var(--accent); transition: width 0.2s ease; }
.progress-label { font-size: 0.8rem; color: var(--text-muted); }

.result {
    display: none;
    flex-direction: column;
    gap: 10px;
    padding: 14px;
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.result.show { display: flex; }
.result-label { font-size: 0.8rem; color: var(--text-muted); }
.result-row { display: flex; align-items: center; gap: 10px; }
.result-value {
    flex: 1;
    min-width: 0;
    padding: 10px 12px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent);
    overflow-wrap: anywhere;
    text-decoration: none;
}
.result img { align-self: center; max-width: 100%; image-rendering: pixelated; background: #fff; padding: 8px; border-radius: var(--radius-sm); }

/* ---- tool modal ---- */

body.modal-open { overflow: hidden; }

.modal {
    position: fixed;
    inset: 0;
    z-index: 50;
    display: none;
    background: rgba(22, 20, 31, 0.35);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}
.modal.open { display: block; }

.modal-panel {
    position: absolute;
    inset: 10%;
    display: flex;
    flex-direction: column;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.modal-head {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-elevated);
}
.modal-head h2 { flex: 1; font-size: 0.95rem; font-weight: 600; }
.modal-close { padding: 6px 8px; }

.modal-body { flex: 1; overflow-y: auto; padding: 28px 24px; }
.tool { max-width: 520px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.tool > p.intro { color: var(--text-muted); font-size: 0.9rem; }

@media (max-width: 640px) {
    .modal-body { padding: 20px 16px; }
    .result-row { flex-direction: column; align-items: stretch; }
}

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}

.facts {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 28px;
    margin-top: 32px;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.facts strong { color: var(--text); font-weight: 600; }

.prose pre {
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    overflow-x: auto;
    margin-bottom: 14px;
    font-size: 0.8rem;
    line-height: 1.6;
}
.prose pre code { background: none; border: 0; padding: 0; color: var(--text); }
.prose .steps { counter-reset: s; list-style: none; padding: 0; }
.prose .steps li { counter-increment: s; padding-left: 40px; position: relative; margin-bottom: 14px; }
.prose .steps li::before {
    content: counter(s);
    position: absolute; left: 0; top: 0;
    width: 26px; height: 26px; border-radius: 50%;
    display: grid; place-items: center;
    font-size: 0.8rem; font-weight: 600;
    background: var(--accent-soft); color: var(--accent); border: 1px solid var(--accent-soft-border);
}
.prose table { display: block; overflow-x: auto; }

.modal-full { padding: 6px 12px; font-size: 0.8rem; }

.checks { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 4px 12px; max-height: 180px; overflow-y: auto; padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg-elevated); }
.check { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--text-muted); cursor: pointer; }
.check input { accent-color: var(--accent); }

/* ---- home sections ---- */

.panel {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 20px;
}
.panel h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
.panel p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }

.step-grid, .keep-grid, .job-grid { list-style: none; display: grid; gap: 14px; }
.step-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.keep-grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.job-grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 10px; }

.num {
    display: grid; place-items: center;
    width: 28px; height: 28px; margin-bottom: 12px;
    border-radius: 50%;
    background: var(--accent-soft); color: var(--accent);
    border: 1px solid var(--accent-soft-border);
    font-size: 0.8rem; font-weight: 600;
}

.job {
    display: flex; flex-direction: column; gap: 2px;
    padding: 14px 16px;
    text-decoration: none; color: inherit;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: border-color 0.15s ease;
}
.job:hover { border-color: var(--accent); }
.job span { font-size: 0.85rem; color: var(--text-muted); }
.job b { font-size: 0.9rem; font-weight: 600; color: var(--accent); }

.keep-grid .panel { display: flex; flex-direction: column; gap: 2px; }
.chip {
    align-self: flex-start;
    margin-top: 12px;
    padding: 3px 10px;
    font-size: 0.75rem; font-weight: 500;
    color: var(--text-muted);
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: 999px;
}
.chip-ok { color: var(--success); background: var(--success-bg); border-color: var(--success-border); }

.fine { margin-top: 16px; font-size: 0.8rem; color: var(--text-faint); }
.fine a { color: var(--accent); }

.dev { display: grid; grid-template-columns: 1fr; gap: 20px; padding: 28px; align-items: center; }
@media (min-width: 760px) { .dev { grid-template-columns: 1fr 1.2fr; } }
.dev h2 { font-size: 1.2rem; font-weight: 650; margin-bottom: 8px; }
.dev p { font-size: 0.9rem; }
.dev a { color: var(--accent); }
.dev code { font-family: var(--font-mono); font-size: 0.85em; }
.dev pre {
    margin: 0; padding: 16px 18px; overflow-x: auto;
    background: #1e1b2e; color: #e6e1f5;
    border-radius: var(--radius-sm);
    font-size: 0.78rem; line-height: 1.65;
}
.dev pre code { color: inherit; }
.dev .c { color: #8d86ad; }

.faq-list { display: flex; flex-direction: column; gap: 8px; margin-top: 16px; }
.faq-list details {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
}
.faq-list details[open] { border-color: var(--accent-soft-border); }
.faq-list summary { cursor: pointer; font-weight: 550; font-size: 0.92rem; }
.faq-list p { margin-top: 8px; font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; }
.faq-list a { color: var(--accent); }

.cta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px 24px; padding: 28px; background: var(--accent-soft); border-color: var(--accent-soft-border); }
.cta h2 { font-size: 1.2rem; font-weight: 650; margin-bottom: 6px; }
.cta p { font-size: 0.9rem; max-width: 520px; }
.cta a:not(.btn) { color: var(--accent); }

/* ---- guides accordion ---- */

.guides { display: flex; flex-direction: column; gap: 10px; margin: 28px 0 8px; }
.guide {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    scroll-margin-top: 16px;
}
.guide[open] { border-color: var(--accent-soft-border); }
.guide > summary {
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    padding: 16px 20px; cursor: pointer; list-style: none;
}
.guide > summary::-webkit-details-marker { display: none; }
.guide > summary h2 { font-size: 1rem; font-weight: 600; margin: 0; }
.guide > summary::after {
    content: ''; width: 8px; height: 8px; flex-shrink: 0;
    border-right: 2px solid var(--text-faint); border-bottom: 2px solid var(--text-faint);
    transform: rotate(45deg); transition: transform 0.15s ease;
}
.guide[open] > summary::after { transform: rotate(-135deg); }
.guide-body { padding: 0 20px 20px; max-width: none; border-top: 1px solid var(--border); }
.guide-body > :first-child { margin-top: 16px; }
.guide-body h3:first-of-type { margin-top: 20px; }