/* ============================================================
   SekiUI showcase — site chrome
   Japanese-minimal editorial. Warm paper, sumi ink, one vermillion accent.
   The preview canvas stays neutral so components read true.
   ============================================================ */

:root {
  /* Light — washi paper */
  --paper:        hsl(40 22% 97.5%);
  --paper-2:      hsl(40 20% 95.5%);
  --surface:      hsl(40 30% 99.5%);
  --ink:          hsl(24 8% 12%);
  --ink-2:        hsl(24 6% 34%);
  --ink-3:        hsl(24 5% 52%);
  --hairline:     hsl(36 12% 86%);
  --hairline-2:   hsl(36 12% 90%);
  --shu:          hsl(8 74% 49%);   /* vermillion / 朱 */
  --shu-soft:     hsl(8 74% 49% / 0.10);
  --canvas-dot:   hsl(30 10% 80%);

  --font-ui: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-display: 'Zen Kaku Gothic New', var(--font-ui);
  --font-mono: ui-monospace, 'SF Mono', SFMono-Regular, 'JetBrains Mono', Menlo, Consolas, monospace;

  --header-h: 56px;
  --sidebar-w: 264px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --paper:        hsl(24 7% 8.5%);
  --paper-2:      hsl(24 7% 11%);
  --surface:      hsl(24 8% 10.5%);
  --ink:          hsl(40 18% 93%);
  --ink-2:        hsl(36 8% 68%);
  --ink-3:        hsl(36 6% 50%);
  --hairline:     hsl(30 6% 20%);
  --hairline-2:   hsl(30 6% 17%);
  --shu:          hsl(9 68% 56%);
  --shu-soft:     hsl(9 68% 56% / 0.14);
  --canvas-dot:   hsl(30 6% 26%);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }

::selection { background: var(--shu-soft); }

/* Focus visibility */
:focus-visible {
  outline: 2px solid var(--shu);
  outline-offset: 2px;
  border-radius: 3px;
}

.skip-link {
  position: fixed; top: 8px; left: 8px; z-index: 200;
  background: var(--ink); color: var(--paper);
  padding: 8px 14px; border-radius: 6px; font-size: 13px;
  transform: translateY(-150%); transition: transform 150ms var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--hairline);
}
.site-header__inner {
  height: var(--header-h);
  display: flex; align-items: center; gap: 18px;
  padding: 0 20px;
  max-width: 1600px; margin: 0 auto;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--ink);
  margin-right: auto;
}
.brand__word {
  font-family: var(--font-display);
  font-weight: 700; font-size: 18px; letter-spacing: -0.01em;
}
.brand__ver {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--ink-3);
  border: 1px solid var(--hairline);
  padding: 2px 6px; border-radius: 5px;
  align-self: center;
}
.site-header__actions { display: flex; align-items: center; gap: 6px; }

.search-trigger {
  display: flex; align-items: center; gap: 8px;
  height: 32px; padding: 0 8px 0 10px;
  background: var(--surface); color: var(--ink-3);
  border: 1px solid var(--hairline); border-radius: 7px;
  font-size: 13px; cursor: pointer; font-family: inherit;
  transition: border-color 150ms var(--ease), color 150ms var(--ease);
}
.search-trigger:hover { border-color: var(--ink-3); color: var(--ink-2); }
.search-trigger kbd {
  font-family: var(--font-mono); font-size: 10.5px;
  background: var(--paper-2); border: 1px solid var(--hairline);
  border-radius: 4px; padding: 1px 4px; color: var(--ink-3);
}
.icon-btn {
  display: inline-grid; place-items: center;
  height: 32px; min-width: 32px; padding: 0 8px;
  border: 1px solid transparent; border-radius: 7px;
  color: var(--ink-2); text-decoration: none; cursor: pointer;
  background: none; font-family: inherit; font-size: 13px;
  transition: background 150ms var(--ease), color 150ms var(--ease);
}
.icon-btn:hover { background: var(--paper-2); color: var(--ink); }
.text-link { font-weight: 500; }
.theme-toggle .i-moon { display: none; }
[data-theme="dark"] .theme-toggle .i-sun { display: none; }
[data-theme="dark"] .theme-toggle .i-moon { display: block; }

.nav-toggle { display: none; }

/* ---------- Layout ---------- */
.layout {
  max-width: 1600px; margin: 0 auto;
  display: grid; grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
}

/* ---------- Sidebar ---------- */
.sidebar {
  position: sticky; top: var(--header-h);
  height: calc(100vh - var(--header-h));
  overflow-y: auto; overscroll-behavior: contain;
  border-right: 1px solid var(--hairline);
  padding: 16px 12px 48px;
}
.sidebar__filter {
  position: relative; display: flex; align-items: center; gap: 8px;
  padding: 0 8px; margin-bottom: 16px;
  height: 34px; border: 1px solid var(--hairline); border-radius: 8px;
  background: var(--surface); color: var(--ink-3);
}
.sidebar__filter input {
  border: none; background: none; outline: none;
  font-family: inherit; font-size: 13.5px; color: var(--ink);
  width: 100%;
}
.sidebar__group { margin-bottom: 20px; }
.sidebar__group-label {
  font-size: 10.5px; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink-3);
  padding: 0 10px; margin-bottom: 6px;
}
.sidebar__item {
  display: flex; align-items: center; gap: 8px;
  position: relative;
  padding: 5px 10px 5px 14px; margin: 1px 0;
  border-radius: 7px; text-decoration: none;
  color: var(--ink-2); font-size: 13.5px;
  transition: background 120ms var(--ease), color 120ms var(--ease);
}
.sidebar__item:hover { background: var(--paper-2); color: var(--ink); }
.sidebar__item[aria-current="page"] {
  color: var(--ink); font-weight: 500;
  background: var(--paper-2);
}
.sidebar__item[aria-current="page"]::before {
  content: ""; position: absolute; left: 3px; top: 50%;
  width: 3px; height: 15px; margin-top: -7.5px;
  background: var(--shu); border-radius: 2px;
}
.sidebar__empty { padding: 10px; color: var(--ink-3); font-size: 13px; }

/* ---------- Content ---------- */
.content { min-height: calc(100vh - var(--header-h)); padding: 0; }
.view { max-width: 940px; margin: 0 auto; padding: 40px 40px 96px; }

.eyebrow {
  font-size: 11px; font-weight: 600; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--shu);
  margin-bottom: 12px;
}
.page-title {
  font-family: var(--font-display);
  font-size: 40px; line-height: 1.08; letter-spacing: -0.02em;
  font-weight: 700; margin: 0 0 12px;
}
.page-desc {
  font-size: 17px; color: var(--ink-2); line-height: 1.6;
  max-width: 62ch; margin: 0 0 8px;
  text-wrap: pretty;
}
.page-meta {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  margin-top: 18px; padding-bottom: 28px;
  border-bottom: 1px solid var(--hairline);
}
.pill {
  font-family: var(--font-mono); font-size: 12px;
  color: var(--ink-2); background: var(--surface);
  border: 1px solid var(--hairline); border-radius: 6px;
  padding: 3px 8px;
}

/* Variant section */
.section { margin-top: 44px; }
.section__head { margin-bottom: 14px; }
.section__title {
  font-size: 15px; font-weight: 600; letter-spacing: -0.01em;
  margin: 0 0 3px; display: flex; align-items: baseline; gap: 10px;
}
.section__note { font-size: 13.5px; color: var(--ink-3); margin: 0; }

/* Preview / code shell */
.demo { border: 1px solid var(--hairline); border-radius: 12px; overflow: hidden; background: var(--surface); }
.demo__tabs {
  display: flex; gap: 2px; padding: 8px 10px 0; border-bottom: 1px solid var(--hairline-2);
}
.demo__tab {
  font: inherit; font-size: 12.5px; color: var(--ink-3);
  background: none; border: none; cursor: pointer;
  padding: 6px 10px; border-radius: 6px 6px 0 0;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.demo__tab:hover { color: var(--ink); }
.demo__tab.is-active { color: var(--ink); border-bottom-color: var(--shu); font-weight: 500; }

.canvas {
  position: relative;
  display: flex; flex-wrap: wrap; align-items: center; gap: 18px;
  min-height: 150px; padding: 34px;
  background-color: var(--surface);
  background-image: radial-gradient(var(--canvas-dot) 1px, transparent 1px);
  background-size: 16px 16px; background-position: -1px -1px;
}
.canvas--center { justify-content: center; }
.canvas--stack { flex-direction: column; align-items: stretch; }
.canvas--stack.canvas--center { align-items: center; }

.codewrap { position: relative; display: none; background: var(--paper-2); border-top: 1px solid var(--hairline-2); }
.codewrap.is-open { display: block; }
.demo pre {
  margin: 0; padding: 18px 20px; overflow-x: auto;
  font-family: var(--font-mono); font-size: 12.5px; line-height: 1.65;
  color: var(--ink);
  tab-size: 2;
}
.demo pre .tag { color: var(--shu); }
.demo pre .attr { color: color-mix(in srgb, var(--ink-2) 90%, var(--shu)); }
.demo pre .val { color: var(--ink-2); }
.demo pre .txt { color: var(--ink); }
[data-theme="dark"] .demo pre .tag { color: hsl(9 70% 62%); }

.copy-btn {
  position: absolute; top: 10px; right: 10px; z-index: 2;
  display: flex; align-items: center; gap: 6px;
  font: inherit; font-size: 12px; color: var(--ink-2);
  background: var(--surface); border: 1px solid var(--hairline);
  border-radius: 6px; padding: 5px 9px; cursor: pointer;
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}
.copy-btn:hover { color: var(--ink); border-color: var(--ink-3); }
.copy-btn.is-copied { color: var(--shu); border-color: var(--shu); }

.storybook-foot {
  margin-top: 56px; padding-top: 22px; border-top: 1px solid var(--hairline);
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  flex-wrap: wrap;
}
.storybook-foot a {
  color: var(--shu); text-decoration: none; font-weight: 500; font-size: 14px;
  display: inline-flex; align-items: center; gap: 6px;
}
.storybook-foot a:hover { text-decoration: underline; }
.pager { display: flex; gap: 10px; font-size: 14px; }
.pager a { color: var(--ink-2); text-decoration: none; }
.pager a:hover { color: var(--shu); }

/* ---------- Landing ---------- */
.hero { position: relative; padding: 64px 40px 40px; max-width: 940px; margin: 0 auto; overflow: hidden; }
.hero__inner { position: relative; z-index: 1; }
.hero h1 {
  font-family: var(--font-display); font-weight: 700;
  font-size: 56px; line-height: 1.02; letter-spacing: -0.03em;
  margin: 18px 0 0;
}
.hero h1 .shu { color: var(--shu); }
.hero__pitch { font-size: 20px; color: var(--ink-2); max-width: 56ch; margin: 18px 0 0; line-height: 1.5; text-wrap: pretty; }
.hero__cmds { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.cmd {
  display: flex; align-items: center; gap: 12px;
  border: 1px solid var(--hairline); border-radius: 9px;
  background: var(--surface); padding: 10px 10px 10px 14px;
  font-family: var(--font-mono); font-size: 13px; color: var(--ink);
}
.cmd .prompt { color: var(--ink-3); }
.cmd button {
  display: grid; place-items: center; width: 28px; height: 28px;
  border: 1px solid var(--hairline); border-radius: 6px;
  background: var(--paper); color: var(--ink-2); cursor: pointer;
  transition: color 120ms var(--ease);
}
.cmd button:hover { color: var(--shu); }
.cmd button.is-copied { color: var(--shu); border-color: var(--shu); }
.hero__links { display: flex; gap: 18px; margin-top: 26px; font-size: 14px; }
.hero__links a { color: var(--ink-2); text-decoration: none; display: inline-flex; gap: 6px; align-items: center; }
.hero__links a:hover { color: var(--shu); }

.teaser { max-width: 940px; margin: 8px auto 0; padding: 24px 40px 80px; }
.teaser__label {
  font-size: 10.5px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 16px;
}
.teaser__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.teaser__card {
  border: 1px solid var(--hairline); border-radius: 12px; background: var(--surface);
  padding: 22px; min-height: 150px;
  display: flex; flex-direction: column; gap: 14px;
}
.teaser__card h3 { margin: 0; font-size: 12px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.teaser__card .tbody { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; flex: 1; }

/* Blocks */
.block-note {
  font-size: 13.5px; color: var(--ink-2); background: var(--surface);
  border: 1px solid var(--hairline); border-left: 2px solid var(--shu);
  border-radius: 8px; padding: 12px 16px; margin: 0 0 24px;
}
.block-canvas {
  border: 1px solid var(--hairline); border-radius: 12px; padding: 28px;
  background-color: var(--paper-2);
  background-image: radial-gradient(var(--canvas-dot) 1px, transparent 1px);
  background-size: 16px 16px; overflow: hidden;
}

/* ---------- Command palette ---------- */
.cmdk { position: fixed; inset: 0; z-index: 120; display: grid; place-items: start center; padding-top: 12vh; }
.cmdk[hidden] { display: none; }
.guard-banner[hidden] { display: none; }
.cmdk__backdrop { position: absolute; inset: 0; background: hsl(24 10% 8% / 0.45); backdrop-filter: blur(2px); }
.cmdk__panel {
  position: relative; width: min(560px, 92vw);
  background: var(--surface); border: 1px solid var(--hairline);
  border-radius: 14px; box-shadow: 0 24px 60px -18px hsl(24 20% 10% / 0.4);
  overflow: hidden;
}
.cmdk__input-row { display: flex; align-items: center; gap: 10px; padding: 14px 16px; border-bottom: 1px solid var(--hairline-2); color: var(--ink-3); }
.cmdk__input-row input { flex: 1; border: none; background: none; outline: none; font-family: inherit; font-size: 16px; color: var(--ink); }
.cmdk__input-row kbd { font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-3); border: 1px solid var(--hairline); border-radius: 4px; padding: 2px 5px; }
.cmdk__results { max-height: 52vh; overflow-y: auto; padding: 8px; }
.cmdk__group-label { font-size: 10.5px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); padding: 10px 10px 4px; }
.cmdk__item { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 9px 10px; border-radius: 8px; cursor: pointer; color: var(--ink-2); font-size: 14px; }
.cmdk__item .cat { font-size: 11px; color: var(--ink-3); }
.cmdk__item.is-active, .cmdk__item:hover { background: var(--paper-2); color: var(--ink); }
.cmdk__empty { padding: 24px 12px; text-align: center; color: var(--ink-3); font-size: 14px; }

/* ---------- Runtime-guard banner ---------- */
.guard-banner {
  position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 300;
  background: var(--shu); color: #fff;
  border-radius: 10px; padding: 12px 16px;
  font-size: 13px; font-family: var(--font-mono);
  box-shadow: 0 12px 30px -10px hsl(8 74% 30% / 0.5);
}
.guard-banner strong { font-family: var(--font-ui); }

/* small helpers used inside demos */
.demo-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.demo-col { display: flex; flex-direction: column; gap: 12px; }
.demo-label { font-size: 12px; color: var(--ink-3); font-family: var(--font-mono); }

/* ---------- Responsive ---------- */
.sidebar-scrim { display: none; }
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .nav-toggle {
    display: inline-grid; gap: 4px; place-content: center;
    width: 34px; height: 34px; border: 1px solid var(--hairline);
    border-radius: 8px; background: var(--surface); cursor: pointer;
    order: -1;
  }
  .nav-toggle span { display: block; width: 16px; height: 1.6px; background: var(--ink); border-radius: 2px; }
  .search-trigger span, .text-link { display: none; }
  .sidebar {
    position: fixed; top: var(--header-h); left: 0; z-index: 90;
    width: 280px; height: calc(100vh - var(--header-h));
    background: var(--paper);
    transform: translateX(-100%); transition: transform 220ms var(--ease);
    box-shadow: 0 20px 40px -20px hsl(24 20% 10% / 0.3);
  }
  .sidebar.is-open { transform: translateX(0); }
  .sidebar-scrim.is-open {
    display: block; position: fixed; inset: var(--header-h) 0 0 0; z-index: 80;
    background: hsl(24 10% 8% / 0.35);
  }
  .view, .hero, .teaser { padding-left: 22px; padding-right: 22px; }
  .hero h1 { font-size: 40px; }
  .page-title { font-size: 32px; }
}
@media (max-width: 520px) {
  .brand__ver { display: none; }
  .canvas { padding: 22px; }
  .view { padding-top: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}