/* ===================================================
   TICKER TOK DOCS — APEX DARK Design System
   =================================================== */

:root {
  --bg: #070A0F;
  --surface: #0C1018;
  --surface-2: #111822;
  --surface-3: #16202E;
  --border: #1A2232;
  --border-2: #222E42;
  --up: #00CC74;
  --up-dim: rgba(0, 204, 116, 0.12);
  --up-glow: rgba(0, 204, 116, 0.25);
  --down: #FF3B5C;
  --down-dim: rgba(255, 59, 92, 0.12);
  --down-glow: rgba(255, 59, 92, 0.25);
  --neutral: #4D8FFF;
  --neutral-dim: rgba(77, 143, 255, 0.12);
  --warn: #FFB020;
  --warn-dim: rgba(255, 176, 32, 0.12);
  --text: #E8EAF0;
  --text-muted: #8B9BB4;
  --text-faint: #3D4E6B;
  --mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;
  --sidebar-width: 268px;
  --content-max: 820px;
  --radius: 8px;
  --radius-sm: 5px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* ===================================================
   LAYOUT
   =================================================== */

.docs-layout {
  display: flex;
  min-height: 100vh;
}

/* ===================================================
   SIDEBAR
   =================================================== */

.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 100;
}

.sidebar-logo {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-logo a {
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--up), var(--neutral));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
  color: #000;
  flex-shrink: 0;
}

img.logo-icon {
  object-fit: contain;
  background: transparent;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
}

.logo-sub {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.sidebar-search {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.search-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px 7px 32px;
  color: var(--text);
  font-size: 13px;
  outline: none;
  position: relative;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236B7A99' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 10px center;
  transition: border-color 0.15s;
}

.search-input:focus {
  border-color: var(--neutral);
}

.search-input::placeholder {
  color: var(--text-faint);
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 0 24px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.nav-group {
  margin-bottom: 4px;
}

.nav-group.search-empty {
  display: none;
}

.nav-item.search-hidden {
  display: none;
}

.nav-group-label {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding: 10px 16px 4px;
  display: block;
}

.nav-item {
  display: block;
  padding: 6px 16px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.4;
  border-radius: 0;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
  border-left: 2px solid transparent;
}

.nav-item:hover {
  color: var(--text);
  background: var(--surface-2);
}

.nav-item.active {
  color: var(--neutral);
  background: var(--neutral-dim);
  border-left-color: var(--neutral);
  font-weight: 500;
}

.nav-item.sub {
  padding-left: 28px;
  font-size: 13px;
}

.nav-item.sub.active {
  color: var(--up);
  background: var(--up-dim);
  border-left-color: var(--up);
}

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--up);
  box-shadow: 0 0 6px var(--up-glow);
  flex-shrink: 0;
}

/* ===================================================
   MAIN CONTENT
   =================================================== */

.content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-width: 0;
}

/* Top bar */
.topbar {
  position: sticky;
  top: 0;
  background: rgba(7, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 12px 48px;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 50;
  font-size: 13px;
  color: var(--text-muted);
}

.topbar-logo {
  display: none;
}

.topbar-sep { color: var(--text-faint); }

.topbar-current { color: var(--text); font-weight: 500; }

/* Page sections */
.doc-section {
  display: none;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 48px 48px 80px;
}

.doc-section.active {
  display: block;
}

/* ===================================================
   TYPOGRAPHY
   =================================================== */

.doc-section h1 {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.25;
  margin-bottom: 16px;
}

.doc-section h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
  margin: 40px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.doc-section h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin: 28px 0 10px;
}

.doc-section h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 20px 0 8px;
}

.doc-section p {
  color: var(--text-muted);
  margin-bottom: 14px;
}

.doc-section p strong {
  color: var(--text);
  font-weight: 600;
}

.doc-section a {
  color: var(--neutral);
  text-decoration: none;
}

.doc-section a:hover {
  text-decoration: underline;
}

.doc-section ul, .doc-section ol {
  color: var(--text-muted);
  padding-left: 22px;
  margin-bottom: 14px;
}

.doc-section li {
  margin-bottom: 5px;
}

.doc-section li strong { color: var(--text); }

.page-lead {
  font-size: 17px;
  line-height: 1.65;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 680px;
}

/* ===================================================
   COMPONENTS
   =================================================== */

/* Hero stat cards */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 28px 0;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.stat-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  margin-bottom: 6px;
}

.stat-value {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
  font-family: var(--mono);
}

.stat-value.up { color: var(--up); }
.stat-value.down { color: var(--down); }
.stat-value.neutral { color: var(--neutral); }

/* Callout boxes */
.callout {
  border-radius: var(--radius);
  padding: 16px 18px;
  margin: 20px 0;
  border-left: 3px solid;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.callout.info {
  background: var(--neutral-dim);
  border-color: var(--neutral);
}

.callout.tip {
  background: var(--up-dim);
  border-color: var(--up);
}

.callout.warn {
  background: var(--warn-dim);
  border-color: var(--warn);
}

.callout.danger {
  background: var(--down-dim);
  border-color: var(--down);
}

.callout-icon {
  font-size: 16px;
  flex-shrink: 0;
  margin-top: 1px;
}

.callout-body {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-muted);
}

.callout-body strong { color: var(--text); }

/* Code blocks */
pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  overflow-x: auto;
  margin: 16px 0;
  position: relative;
}

pre code {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text);
  background: none;
  padding: 0;
}

code {
  font-family: var(--mono);
  font-size: 12.5px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--neutral);
}

.code-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  margin-bottom: 6px;
}

/* Syntax colors */
.kw  { color: #BD93F9; }   /* keywords */
.fn  { color: #50FA7B; }   /* functions */
.str { color: #F1FA8C; }   /* strings */
.num { color: #FF79C6; }   /* numbers */
.cm  { color: #6272A4; }   /* comments */
.ty  { color: #8BE9FD; }   /* types */
.ev  { color: var(--up); } /* events */
.ad  { color: var(--warn); } /* addresses */

/* Tables */
.doc-table-wrap {
  overflow-x: auto;
  margin: 16px 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

thead tr {
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

th {
  text-align: left;
  padding: 10px 16px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-faint);
  white-space: nowrap;
}

td {
  padding: 10px 16px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

tr:last-child td { border-bottom: none; }

tbody tr:hover { background: var(--surface-2); }

td code { font-size: 12px; }

td strong { color: var(--text); font-weight: 600; }

/* Round lifecycle diagram */
.lifecycle {
  display: flex;
  align-items: center;
  gap: 0;
  margin: 24px 0;
  overflow-x: auto;
}

.lc-step {
  flex: 1;
  min-width: 100px;
  text-align: center;
  padding: 14px 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  position: relative;
}

.lc-step:first-child { border-radius: var(--radius) 0 0 var(--radius); }
.lc-step:last-child { border-radius: 0 var(--radius) var(--radius) 0; }

.lc-step + .lc-step { border-left: none; }

.lc-step.active-step {
  background: var(--neutral-dim);
  border-color: var(--neutral);
}

.lc-icon {
  font-size: 20px;
  display: block;
  margin-bottom: 4px;
}

.lc-name {
  font-size: 12px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.03em;
}

.lc-dur {
  font-size: 11px;
  color: var(--text-faint);
  margin-top: 2px;
}

.lc-arrow {
  font-size: 18px;
  color: var(--text-faint);
  padding: 0 4px;
  flex-shrink: 0;
}

/* Function signature */
.fn-sig {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin: 20px 0;
  overflow: hidden;
}

.fn-sig-header {
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.fn-badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 2px 7px;
  border-radius: 3px;
}

.fn-badge.write { background: var(--down-dim); color: var(--down); }
.fn-badge.read  { background: var(--up-dim); color: var(--up); }
.fn-badge.event { background: var(--neutral-dim); color: var(--neutral); }
.fn-badge.admin { background: var(--warn-dim); color: var(--warn); }

.fn-name {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.fn-sig-body {
  padding: 16px;
}

.fn-sig-body p {
  font-size: 13.5px;
  margin-bottom: 12px;
}

.param-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.param-list li {
  display: flex;
  gap: 12px;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  align-items: flex-start;
}

.param-list li:last-child { border-bottom: none; }

.param-name {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--up);
  min-width: 140px;
  flex-shrink: 0;
}

.param-type {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--neutral);
  min-width: 80px;
  flex-shrink: 0;
  margin-top: 1px;
}

.param-desc { color: var(--text-muted); }

/* Address tag */
.addr {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--warn);
  margin: 4px 0;
}

.addr-copy {
  cursor: pointer;
  color: var(--text-faint);
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 3px;
  transition: color 0.15s, background 0.15s;
  background: none;
  border: none;
  font-family: inherit;
}

.addr-copy:hover { color: var(--text); background: var(--surface-2); }

/* Architecture box */
.arch-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--text-muted);
  margin: 20px 0;
  overflow-x: auto;
}

.arch-box .arch-h { color: var(--up); font-weight: 700; }
.arch-box .arch-n { color: var(--neutral); }
.arch-box .arch-w { color: var(--warn); }
.arch-box .arch-d { color: var(--down); }

/* FAQ items */
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  overflow: hidden;
}

.faq-q {
  padding: 14px 18px;
  background: var(--surface);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: background 0.15s;
}

.faq-q:hover { background: var(--surface-2); }

.faq-arrow {
  color: var(--text-faint);
  font-size: 16px;
  transition: transform 0.2s;
  flex-shrink: 0;
}

.faq-item.open .faq-arrow { transform: rotate(180deg); }

.faq-a {
  display: none;
  padding: 14px 18px;
  background: var(--surface-2);
  border-top: 1px solid var(--border);
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-item.open .faq-a { display: block; }

/* Step list */
.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 16px 0;
}

.steps li {
  counter-increment: step;
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
  align-items: flex-start;
}

.steps li::before {
  content: counter(step);
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--neutral-dim);
  border: 1px solid var(--neutral);
  color: var(--neutral);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}

/* Prev/Next nav */
.page-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.page-nav a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  flex: 1;
  transition: border-color 0.15s, background 0.15s;
  max-width: 280px;
}

.page-nav a:hover {
  border-color: var(--neutral);
  background: var(--neutral-dim);
}

.page-nav a.next { text-align: right; margin-left: auto; }

.nav-hint {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  font-weight: 600;
}

.nav-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

/* Tag pill */
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.tag.up   { background: var(--up-dim); color: var(--up); }
.tag.down { background: var(--down-dim); color: var(--down); }
.tag.neu  { background: var(--neutral-dim); color: var(--neutral); }
.tag.warn { background: var(--warn-dim); color: var(--warn); }

/* Horizontal rule */
.doc-section hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

/* Two-column grid */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 20px 0;
}

.col-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}

.col-card h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  text-transform: none;
  letter-spacing: 0;
}

.col-card p {
  font-size: 13px;
  margin: 0;
}

/* Mode badge */
.mode-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.mode-label.idle { background: var(--warn-dim); color: var(--warn); }
.mode-label.active { background: var(--up-dim); color: var(--up); }

/* ===================================================
   MOBILE HAMBURGER
   =================================================== */

.mobile-toggle {
  display: none;
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 200;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  cursor: pointer;
  color: var(--text);
  font-size: 18px;
  line-height: 1;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 99;
}

/* ===================================================
   RESPONSIVE
   =================================================== */

@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.25s ease;
  }

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

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

  .content {
    margin-left: 0;
  }

  .doc-section {
    padding: 32px 20px 60px;
  }

  .topbar {
    padding: 12px 20px 12px 52px;
    flex-wrap: nowrap;
    min-width: 0;
  }

  .topbar-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    font-size: 14px;
    flex-shrink: 0;
    margin-right: 4px;
  }

  .topbar-logo:hover { color: var(--neutral); }

  .topbar-logo-icon {
    width: 24px;
    height: 24px;
    object-fit: contain;
    flex-shrink: 0;
  }

  .topbar-logo-text {
    white-space: nowrap;
  }

  .mobile-toggle {
    display: block;
  }

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

  .two-col {
    grid-template-columns: 1fr;
  }

  .lifecycle {
    flex-direction: column;
    align-items: stretch;
  }

  .lc-step:first-child { border-radius: var(--radius) var(--radius) 0 0; }
  .lc-step:last-child { border-radius: 0 0 var(--radius) var(--radius); }
  .lc-step + .lc-step { border-left: 1px solid var(--border); border-top: none; }
  .lc-arrow { transform: rotate(90deg); }

  /* Step-by-step: tablet */
  .steps { margin: 12px 0; }
  .steps li { gap: 12px; margin-bottom: 14px; }
  .arch-box { padding: 16px; font-size: 12px; }
}

@media (max-width: 600px) {
  .doc-section h1 { font-size: 22px; }
  .doc-section h2 { font-size: 17px; }
  .doc-section h3 { font-size: 15px; }
  .page-nav { flex-direction: column; }
  .page-nav a.next { text-align: left; margin-left: 0; max-width: 100%; }

  /* Step-by-step: mobile */
  .steps {
    margin: 10px 0;
    padding-left: 0;
  }
  .steps li {
    display: flex;
    flex-wrap: nowrap;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 13px;
    line-height: 1.6;
    align-items: flex-start;
    overflow-wrap: break-word;
    word-wrap: break-word;
  }
  .steps li::before {
    width: 22px;
    height: 22px;
    min-width: 22px;
    font-size: 11px;
    margin-top: 2px;
  }
  .arch-box {
    padding: 12px 14px;
    font-size: 11.5px;
    line-height: 1.75;
    margin: 16px 0;
    white-space: pre-wrap;
    word-break: break-word;
    overflow-x: auto;
  }
}