/* ============================================================
   kuroshiro-enhance demo — stylesheet
   Built on top of tokens.css design tokens.
   ============================================================ */

:root {
    --font-jp: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN",
               "Yu Gothic", Meiryo, sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg-2);
    color: var(--fg-1);
    font-family: var(--font-sans);
    font-size: var(--fs-15);
    line-height: var(--lh-normal);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

p { margin: 0; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--ke-ink-200); border-radius: 999px; border: 2px solid var(--bg-2); }
::-webkit-scrollbar-thumb:hover { background: var(--ke-ink-300); }
::-webkit-scrollbar-corner { background: transparent; }

[data-lucide] {
    width: 16px; height: 16px;
    stroke-width: 1.75;
    flex-shrink: 0;
}
.spin { animation: spin 0.9s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.japanese-text, .japanese-text * { font-family: var(--font-jp); }

/* ============================================================
   1. Top nav
   ============================================================ */
.ke-nav {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-1);
}
.ke-nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px var(--sp-6);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-4);
}
.ke-brand {
    display: flex; align-items: center; gap: var(--sp-3);
    text-decoration: none; color: inherit;
}
.ke-brand:hover { border: none; }
.ke-brand img {
    height: 22px; width: auto; display: block;
}
.ke-brand-divider {
    width: 1px; height: 18px; background: var(--border-1);
}
.ke-brand-product {
    font-family: var(--font-mono);
    font-size: var(--fs-13);
    color: var(--ke-navy-800);
    font-weight: 500;
    letter-spacing: var(--tracking-snug);
}
.ke-nav-links {
    display: flex; gap: var(--sp-6);
    margin-left: auto;
    margin-right: var(--sp-5);
}
.ke-nav-links a {
    font-size: var(--fs-14);
    color: var(--fg-2);
    text-decoration: none;
    border: none;
    transition: color var(--dur-1) var(--ease-out);
    font-weight: 500;
}
.ke-nav-links a:hover { color: var(--ke-navy-800); }

/* ============================================================
   2. Buttons
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    font-size: var(--fs-14);
    font-weight: 500;
    border-radius: var(--r-2);
    border: 1px solid transparent;
    transition: background var(--dur-1) var(--ease-out),
                color var(--dur-1) var(--ease-out),
                border-color var(--dur-1) var(--ease-out),
                box-shadow var(--dur-1) var(--ease-out);
    white-space: nowrap;
    text-decoration: none;
}
.btn-sm { padding: 7px 12px; font-size: var(--fs-13); }
.btn-block { width: 100%; padding: 12px; font-size: var(--fs-15); }

.btn-primary {
    background: var(--ke-navy-500);
    color: #fff;
    box-shadow: var(--shadow-1);
}
.btn-primary:hover { background: var(--ke-navy-600); }
.btn-primary:active { background: var(--ke-navy-700); }
.btn-primary:disabled { background: var(--ke-ink-300); cursor: not-allowed; box-shadow: none; }

.btn-secondary {
    background: #fff;
    color: var(--ke-navy-700);
    border-color: var(--border-1);
}
.btn-secondary:hover { background: rgba(40,73,157,0.04); border-color: var(--ke-ink-300); }

.btn-ghost {
    background: transparent;
    color: var(--fg-2);
    padding: 6px 10px;
}
.btn-ghost:hover { color: var(--ke-navy-700); background: var(--bg-3); }
.btn-ghost.copied { color: var(--ke-success); }

/* ============================================================
   3. Page + hero
   ============================================================ */
.page {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--sp-9) var(--sp-6) var(--sp-11);
    flex: 1;
}

.eyebrow {
    display: inline-block;
    font-size: var(--fs-12);
    font-weight: 600;
    letter-spacing: var(--tracking-cap);
    text-transform: uppercase;
    color: var(--ke-violet-500);
    margin-bottom: var(--sp-3);
}

.hero {
    padding: var(--sp-3) 0 var(--sp-7);
    border-bottom: 1px solid var(--border-1);
    margin-bottom: var(--sp-9);
}
.hero h1 {
    font-size: clamp(2.4rem, 5.5vw, 4rem);
    line-height: 1.05;
    letter-spacing: var(--tracking-tight);
    font-weight: 700;
    color: var(--ke-navy-800);
    margin: 0 0 var(--sp-5);
    max-width: 22ch;
}
.hero h2 {
    font-size: clamp(1.6rem, 3.5vw, 2.5rem);
    line-height: 1.1;
    letter-spacing: var(--tracking-tight);
    font-weight: 600;
    color: var(--ke-navy-800);
    margin: 0 0 var(--sp-5);
    max-width: 28ch;
}
.hero-accent {
    color: var(--ke-navy-500);
    font-style: italic;
    font-weight: 700;
}
.lede {
    max-width: 64ch;
    color: var(--fg-2);
    font-size: var(--fs-18);
    line-height: var(--lh-normal);
}
.hero-meta {
    display: flex; flex-wrap: wrap; gap: var(--sp-2);
    margin-top: var(--sp-6);
}
.hero-chip {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 12px;
    background: #fff;
    border: 1px solid var(--border-1);
    border-radius: var(--r-pill);
    font-size: var(--fs-13);
    color: var(--fg-2);
    font-family: var(--font-mono);
}
.hero-chip [data-lucide] { width: 14px; height: 14px; color: var(--ke-navy-500); }

/* ============================================================
   4. Sections
   ============================================================ */
.section {
    margin-bottom: var(--sp-11);
    scroll-margin-top: 88px;
}
.section-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--sp-6);
    margin-bottom: var(--sp-6);
    flex-wrap: wrap;
}
.section-header h2 {
    font-size: var(--fs-36);
    line-height: var(--lh-tight);
    letter-spacing: var(--tracking-snug);
    font-weight: 700;
    color: var(--ke-navy-800);
    margin: 0 0 var(--sp-2);
}
.section-sub {
    color: var(--fg-2);
    font-size: var(--fs-16);
    max-width: 60ch;
    line-height: var(--lh-normal);
}
.section-sub code { font-family: var(--font-mono); font-size: 0.92em; color: var(--ke-navy-700); background: var(--bg-3); padding: 1px 6px; border-radius: var(--r-1); border: 1px solid var(--border-2); }

.sample-block {
    display: flex; flex-direction: column; align-items: flex-end;
    gap: 4px;
}
.sample-label {
    font-size: var(--fs-12);
    font-weight: 600;
    letter-spacing: var(--tracking-cap);
    text-transform: uppercase;
    color: var(--fg-3);
}
.sample-text {
    font-size: var(--fs-18);
    color: var(--ke-navy-800);
    font-weight: 500;
}

/* ============================================================
   5. Cards
   ============================================================ */
.card {
    background: #fff;
    border: 1px solid var(--border-1);
    border-radius: var(--r-3);
    box-shadow: var(--shadow-2);
}

/* ============================================================
   6. Playground
   ============================================================ */
.playground { padding: 0; overflow: hidden; }
.play-grid {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    min-height: 460px;
}
.play-col {
    padding: var(--sp-6);
    display: flex;
    flex-direction: column;
    gap: var(--sp-4);
    min-width: 0;
}
.play-col-input {
    border-right: 1px solid var(--border-1);
    background: #fff;
}
.play-col-result {
    background: var(--bg-2);
    gap: var(--sp-3);
}

@media (max-width: 880px) {
    .play-grid { grid-template-columns: 1fr; }
    .play-col-input { border-right: none; border-bottom: 1px solid var(--border-1); }
}

/* fields */
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field-full { grid-column: 1 / -1; }
.field label {
    font-size: var(--fs-12);
    font-weight: 600;
    color: var(--ke-navy-800);
    letter-spacing: var(--tracking-snug);
}
.hint {
    font-size: var(--fs-12);
    color: var(--fg-3);
    margin-top: 2px;
}
.hint code {
    font-family: var(--font-mono);
    font-size: 0.92em;
    background: var(--bg-3);
    border: 1px solid var(--border-2);
    border-radius: var(--r-1);
    padding: 0 5px;
    color: var(--ke-navy-700);
}

textarea, select {
    width: 100%;
    border: 1px solid var(--border-1);
    border-radius: var(--r-2);
    background: #fff;
    color: var(--fg-1);
    font-size: var(--fs-14);
    transition: border-color var(--dur-1) var(--ease-out),
                box-shadow var(--dur-1) var(--ease-out);
}
textarea {
    min-height: 168px;
    padding: 14px 16px;
    resize: vertical;
    font-family: var(--font-jp);
    font-size: var(--fs-16);
    line-height: 1.75;
}
select {
    height: 40px;
    padding: 0 12px;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2328499d' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'></polyline></svg>");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
    cursor: pointer;
}
textarea:focus, select:focus {
    outline: none;
    border-color: var(--ke-navy-500);
    box-shadow: var(--ring-focus);
}
textarea:disabled, select:disabled { background: var(--bg-3); cursor: not-allowed; opacity: 0.7; }

.options-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--sp-3);
}

/* Result */
.result-header {
    display: flex; align-items: center; justify-content: space-between;
    gap: var(--sp-2);
}
.result-label {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: var(--fs-12);
    font-weight: 600;
    letter-spacing: var(--tracking-cap);
    text-transform: uppercase;
    color: var(--fg-2);
}
.status-dot {
    width: 6px; height: 6px;
    border-radius: 999px;
    background: var(--ke-violet-500);
    box-shadow: 0 0 0 3px rgba(80,64,152,0.18);
}

.result-box {
    flex: 1;
    min-height: 240px;
    max-height: 400px;
    border: 1px solid var(--border-1);
    border-radius: var(--r-3);
    background: #fff;
    padding: var(--sp-5);
    overflow: auto;
    color: var(--fg-1);
    font-family: var(--font-jp);
    font-size: var(--fs-18);
    line-height: 2;
    white-space: pre-wrap;
    word-break: break-word;
}
.result-box.compact {
    min-height: 80px;
    max-height: 200px;
    padding: 14px;
    font-size: var(--fs-15);
    line-height: 1.75;
}
.result-box.json-mode {
    font-family: var(--font-mono);
    font-size: var(--fs-13);
    line-height: 1.55;
    background: var(--ke-ink-900);
    color: var(--ke-ink-50);
    white-space: pre;
    border-color: var(--ke-ink-700);
}
.result-box.json-mode::-webkit-scrollbar-thumb { background: var(--ke-ink-600); border-color: var(--ke-ink-900); }
.result-box.json-mode::-webkit-scrollbar-thumb:hover { background: var(--ke-ink-500); }
.result-box.error {
    border-color: rgba(196,51,77,0.4);
    background: #fdf3f4;
    color: var(--ke-danger);
    font-family: var(--font-sans);
    font-size: var(--fs-14);
}
.result-box.error::-webkit-scrollbar-thumb { background: var(--ke-ink-400); border-color: #fdf3f4; }
.result-box.loading {
    scrollbar-color: var(--ke-ink-300) transparent;
}
.result-box.loading::-webkit-scrollbar-thumb { background: var(--ke-ink-300); border-color: var(--bg-2); }
.result-box.loading::-webkit-scrollbar-thumb:hover { background: var(--ke-ink-200); }
    display: flex; align-items: center; gap: 10px;
    color: var(--fg-2);
    font-family: var(--font-sans);
    font-size: var(--fs-14);
    font-style: italic;
    min-height: 80px;
}
.result-box.loading::before {
    content: "";
    width: 16px; height: 16px;
    border: 2px solid var(--border-1);
    border-top-color: var(--ke-navy-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ruby (furigana) styling */
ruby, rt, ruby > rb { font-family: var(--font-jp); }
ruby { line-height: 2.6; }
rt {
    font-size: 0.58em;
    font-weight: 500;
    line-height: 0.5em;
    color: var(--ke-violet-500);
    letter-spacing: 0.02em;
}

/* ============================================================
   7. Mode comparison
   ============================================================ */
.comparison-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--sp-4);
}
@media (max-width: 720px) { .comparison-grid { grid-template-columns: 1fr; } }

.comparison-card {
    background: #fff;
    border: 1px solid var(--border-1);
    border-radius: var(--r-3);
    box-shadow: var(--shadow-2);
    overflow: hidden;
    transition: box-shadow var(--dur-1) var(--ease-out);
}
.comparison-card:hover { box-shadow: var(--shadow-3); }
.comparison-card.wide { grid-column: 1 / -1; }

.comparison-head {
    display: flex; flex-wrap: wrap; align-items: flex-start;
    justify-content: space-between;
    gap: var(--sp-3);
    padding: var(--sp-4) var(--sp-5);
    border-bottom: 1px solid var(--border-2);
    background: var(--bg-2);
}
.mode-name {
    font-family: var(--font-mono);
    font-size: var(--fs-14);
    font-weight: 600;
    color: var(--ke-navy-800);
    padding: 3px 10px;
    background: #fff;
    border: 1px solid var(--border-1);
    border-radius: var(--r-1);
}
.mode-note {
    flex: 1 1 200px;
    color: var(--fg-2);
    font-size: var(--fs-13);
    text-align: right;
    line-height: var(--lh-snug);
}

.comparison-body {
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
    padding: var(--sp-5);
}

.options-snippet {
    margin: 0;
    font-size: var(--fs-12) !important;
    padding: 12px 14px !important;
}

/* ============================================================
   8. Code blocks
   ============================================================ */
.code-block {
    background: var(--ke-ink-900);
    color: var(--ke-ink-50);
    border: 1px solid var(--ke-ink-700);
    border-radius: var(--r-3);
    padding: var(--sp-5);
    font-family: var(--font-mono);
    font-size: var(--fs-13);
    line-height: 1.6;
    white-space: pre;
    overflow-x: auto;
    margin: var(--sp-4) 0 0;
}
.code-block code { font-family: inherit; color: inherit; background: none; border: none; padding: 0; }
.code-block::-webkit-scrollbar-thumb { background: var(--ke-ink-600); border-color: var(--ke-ink-900); }
.code-block::-webkit-scrollbar-thumb:hover { background: var(--ke-ink-500); }

p code, li code, td code {
    font-family: var(--font-mono);
    font-size: 0.92em;
    background: var(--bg-3);
    border: 1px solid var(--border-2);
    border-radius: var(--r-1);
    padding: 1px 6px;
    color: var(--ke-navy-700);
    overflow-wrap: anywhere;
}

/* ============================================================
   9. Docs layout (sticky TOC + content)
   ============================================================ */
.docs-section { scroll-margin-top: 88px; }

.docs-layout {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: var(--sp-9);
    align-items: start;
}
@media (max-width: 880px) {
    .docs-layout { grid-template-columns: 1fr; gap: var(--sp-5); }
    .docs-toc { position: static !important; }
}

.docs-toc {
    position: sticky;
    top: 88px;
    padding: var(--sp-5) 0;
    border-right: 1px solid var(--border-1);
}
@media (max-width: 880px) { .docs-toc { border-right: none; padding: 0; } }

.toc-label {
    display: block;
    font-size: var(--fs-12);
    font-weight: 600;
    letter-spacing: var(--tracking-cap);
    text-transform: uppercase;
    color: var(--ke-violet-500);
    margin-bottom: var(--sp-3);
}
.docs-toc ol {
    list-style: none;
    margin: 0; padding: 0;
    counter-reset: toc;
    display: flex; flex-direction: column; gap: 2px;
}
.docs-toc li {
    counter-increment: toc;
}
.docs-toc a {
    display: flex; align-items: baseline; gap: 10px;
    padding: 6px 0;
    font-size: var(--fs-14);
    color: var(--fg-2);
    text-decoration: none;
    border: none;
    transition: color var(--dur-1) var(--ease-out);
}
.docs-toc a::before {
    content: counter(toc, decimal-leading-zero);
    font-family: var(--font-mono);
    font-size: var(--fs-12);
    color: var(--fg-3);
    transition: color var(--dur-1) var(--ease-out);
}
.docs-toc a:hover { color: var(--ke-navy-800); }
.docs-toc a:hover::before { color: var(--ke-navy-500); }

.docs-body { min-width: 0; display: flex; flex-direction: column; gap: var(--sp-9); }

.doc-section {
    min-width: 0;
    scroll-margin-top: 88px;
}
.doc-section h3 {
    font-size: var(--fs-24);
    line-height: var(--lh-snug);
    letter-spacing: var(--tracking-snug);
    font-weight: 600;
    color: var(--ke-navy-800);
    margin: 0 0 var(--sp-3);
}
.doc-section p {
    color: var(--fg-2);
    margin: 0;
    max-width: 64ch;
}

/* API table */
.api-table-wrap {
    margin-top: var(--sp-4);
    border: 1px solid var(--border-1);
    border-radius: var(--r-3);
    overflow: hidden;
    background: #fff;
    overflow-x: auto;
}
table {
    width: 100%;
    min-width: 720px;
    border-collapse: collapse;
}
th, td {
    padding: 12px 16px;
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid var(--border-2);
    font-size: var(--fs-13);
}
th {
    background: var(--bg-2);
    color: var(--ke-navy-800);
    font-weight: 600;
    font-size: var(--fs-12);
    letter-spacing: var(--tracking-snug);
    text-transform: uppercase;
}
td { color: var(--fg-2); }
td:first-child { color: var(--fg-1); }
th:nth-child(1), td:nth-child(1),
th:nth-child(2), td:nth-child(2) {
    white-space: nowrap;
}
tr:last-child td { border-bottom: none; }

.inline-list {
    display: flex; flex-wrap: wrap; gap: 8px;
    margin: var(--sp-4) 0 0;
    padding: 0;
    list-style: none;
}
.inline-list li {
    background: #fff;
    border: 1px solid var(--border-1);
    border-radius: var(--r-pill);
    padding: 5px 12px;
    font-size: var(--fs-13);
}
.inline-list code {
    background: none;
    border: none;
    padding: 0;
    color: var(--ke-navy-700);
}

/* ============================================================
   10. Footer
   ============================================================ */
.ke-footer {
    margin-top: auto;
    border-top: 1px solid var(--border-1);
    background: #fff;
}
.ke-footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--sp-6);
    display: flex; align-items: center; gap: var(--sp-4);
    flex-wrap: wrap;
}
.footer-mark { height: 18px; width: auto; opacity: 0.85; }
.footer-text {
    font-size: var(--fs-13);
    color: var(--fg-3);
}
.footer-text .dot { color: var(--ke-ink-300); margin: 0 2px; }

/* ============================================================
   11. Responsive trims
   ============================================================ */
@media (max-width: 720px) {
    .ke-nav-links { display: none; }
    .ke-nav-inner { padding: 12px var(--sp-4); }
    .page { padding: var(--sp-7) var(--sp-4); }
    .hero h1 { font-size: clamp(2rem, 9vw, 3rem); }
    .section-header { flex-direction: column; align-items: flex-start; gap: var(--sp-3); }
    .sample-block { align-items: flex-start; }
    .mode-note { text-align: left; }
}