/* ============================================
   Zieex Documentation — style.css
   Brand colors: --zx-fg: #1a1a2e | --zx-accent: #6366f1
   ============================================ */

:root {
  --bg:            #0f0f1a;
  --bg-surface:    #15151f;
  --bg-elevated:   #1c1c2b;
  --bg-code:       #111120;
  --border:        #2a2a3d;
  --border-subtle: #1f1f2e;

  --text-primary:  #e8e8f0;
  --text-secondary:#9898b8;
  --text-muted:    #60607a;

  --accent:        #6366f1;
  --accent-hover:  #818cf8;
  --accent-dim:    rgba(99, 102, 241, 0.12);
  --accent-glow:   rgba(99, 102, 241, 0.25);

  --green:         #22c55e;
  --yellow:        #f59e0b;
  --red:           #ef4444;

  --font-sans:     'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm:     4px;
  --radius:        8px;
  --radius-lg:     12px;

  --sidebar-w:     260px;
  --topbar-h:      56px;
  --content-max:   820px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ── Topbar ── */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: rgba(15, 15, 26, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  z-index: 100;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo-zx {
  font-size: 1.2rem;
}

.logo-version {
  font-size: 0.7rem;
  font-weight: 500;
  background: var(--accent-dim);
  color: var(--accent-hover);
  border: 1px solid rgba(99,102,241,0.3);
  padding: 1px 6px;
  border-radius: 99px;
  font-family: var(--font-mono);
}

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.topbar-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  transition: color 0.15s;
}

.topbar-nav a:hover { color: var(--text-primary); }

.topbar-github {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  font-size: 0.82rem !important;
  transition: border-color 0.15s, color 0.15s !important;
}

.topbar-github:hover {
  border-color: var(--accent) !important;
  color: var(--accent-hover) !important;
}

/* ── Menu Toggle (mobile) ── */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.2s;
}

/* ── Layout ── */
.layout {
  display: flex;
  margin-top: var(--topbar-h);
  min-height: calc(100vh - var(--topbar-h));
}

/* ── Sidebar ── */
.sidebar {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  width: var(--sidebar-w);
  height: calc(100vh - var(--topbar-h));
  background: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 50;
  transition: transform 0.25s ease;
}

.sidebar-inner {
  padding: 1.5rem 0 3rem;
}

.sidebar-section {
  margin-bottom: 0.25rem;
  padding: 0 0 0.75rem;
}

.sidebar-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-muted);
  padding: 0.75rem 1.25rem 0.35rem;
}

.sidebar-link {
  display: block;
  padding: 0.42rem 1.25rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  border-left: 2px solid transparent;
  transition: color 0.12s, border-color 0.12s, background 0.12s;
}

.sidebar-link:hover {
  color: var(--text-primary);
  background: var(--accent-dim);
}

.sidebar-link.active {
  color: var(--accent-hover);
  border-left-color: var(--accent);
  background: var(--accent-dim);
  font-weight: 500;
}

/* ── Overlay ── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 40;
}

/* ── Content ── */
.content {
  flex: 1;
  margin-left: var(--sidebar-w);
  padding: 3rem 3rem 6rem;
  max-width: calc(var(--sidebar-w) + var(--content-max));
  min-width: 0;
}

/* ── Doc Section ── */
.doc-section {
  max-width: var(--content-max);
  margin-bottom: 0.5rem;
  scroll-margin-top: calc(var(--topbar-h) + 2rem);
}

.section-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-lead {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  max-width: 600px;
}

.doc-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 1rem;
  margin-top: 0.25rem;
  scroll-margin-top: calc(var(--topbar-h) + 2rem);
}

.doc-section h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 2rem 0 0.6rem;
  letter-spacing: -0.01em;
}

.doc-section p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

/* ── Feature Grid ── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 0.5rem;
}

.feature-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  transition: border-color 0.15s;
}

.feature-card:hover {
  border-color: var(--accent);
}

.feature-icon {
  font-size: 1.4rem;
  margin-bottom: 0.6rem;
}

.feature-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}

.feature-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ── Divider ── */
.divider {
  height: 1px;
  background: var(--border-subtle);
  margin: 3rem 0;
  max-width: var(--content-max);
}

/* ── Code Blocks ── */
.code-block {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 0.75rem 0 1.5rem;
  font-family: var(--font-mono);
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border-subtle);
}

.code-header span {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.code-block pre {
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.7;
  color: #c8c8e8;
}

.code-block code {
  font-family: var(--font-mono);
}

/* Syntax highlighting */
.hl-kw  { color: #818cf8; }           /* keyword: class, function, use, etc */
.hl-fn  { color: #60a5fa; }           /* function name */
.hl-str { color: #86efac; }           /* string */
.hl-num { color: #fb923c; }           /* number */
.hl-var { color: #e2e8f0; }           /* variable */
.hl-cls { color: #67e8f9; }           /* class name */
.hl-tag { color: #818cf8; }           /* HTML tag */
.hl-attr{ color: #7dd3fc; }           /* HTML attribute */
.code-comment { color: var(--text-muted); font-style: italic; }

/* Copy button */
.copy-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.7rem;
  font-family: var(--font-sans);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
}

.copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent-hover);
}

.copy-btn.copied {
  border-color: var(--green);
  color: var(--green);
}

/* Inline code */
code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--accent-hover);
  padding: 1px 5px;
  border-radius: var(--radius-sm);
}

.code-block code {
  background: none;
  border: none;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

/* ── Tables ── */
.req-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0 1.5rem;
  font-size: 0.855rem;
}

.req-table thead th {
  text-align: left;
  padding: 0.6rem 0.9rem;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.req-table tbody tr {
  border-bottom: 1px solid var(--border-subtle);
  transition: background 0.1s;
}

.req-table tbody tr:hover {
  background: var(--bg-elevated);
}

.req-table tbody td {
  padding: 0.65rem 0.9rem;
  color: var(--text-secondary);
  vertical-align: top;
}

.req-table tbody td:first-child {
  color: var(--text-primary);
  white-space: nowrap;
}

/* ── Badges ── */
.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  font-family: var(--font-mono);
  padding: 2px 8px;
  border-radius: 99px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.badge-green {
  background: rgba(34,197,94,0.1);
  border-color: rgba(34,197,94,0.3);
  color: var(--green);
}

/* ── Step list ── */
.step-list {
  margin: 0.5rem 0 1.5rem;
  padding-left: 1.25rem;
  color: var(--text-secondary);
}

.step-list li {
  margin-bottom: 0.5rem;
  padding-left: 0.25rem;
  line-height: 1.6;
}

/* ── Info box ── */
.info-box {
  background: var(--accent-dim);
  border: 1px solid rgba(99,102,241,0.25);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 1rem 0 1.5rem;
}

.info-box strong {
  color: var(--accent-hover);
  display: block;
  margin-bottom: 0.2rem;
}

/* ── Footer ── */
.doc-footer {
  max-width: var(--content-max);
  border-top: 1px solid var(--border-subtle);
  padding: 2rem 0 1rem;
  margin-top: 4rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-sep { color: var(--border); }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 900px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay.open {
    display: block;
  }

  .content {
    margin-left: 0;
    padding: 2rem 1.25rem 4rem;
  }

  .topbar-nav a:not(.topbar-github) {
    display: none;
  }

  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .code-block pre {
    font-size: 0.76rem;
  }
}

@media (max-width: 480px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}