/* Load base CSS custom properties — required by topic, fab, and lab pages */
@import url('/styles/vars.css');

:root {
  /* Inherit from vars.css if possible, but providing fallbacks for independent pages */
  --mono:    var(--font-mono, 'Share Tech Mono', monospace);
  --display: var(--font-display, 'Outfit', 'Kanit', sans-serif);
  --body:    var(--font-body, 'Kanit', sans-serif);
  
  --radius: 14px;
  --radius-lg: 20px;
  --tr: var(--transition, all 0.3s cubic-bezier(0.19, 1, 0.22, 1));
  --shadow-card: var(--shadow-card);
  --shadow-float: var(--shadow-float);
  --focus-ring: var(--focus-ring);
  --grid-overlay: rgba(148,163,184,0.01);
  
  --content-nav-active: var(--accent);
  --content-nav-active-dim: var(--accent-dim);
  --content-badge-color: var(--green);
  --content-progress-gradient: linear-gradient(90deg, var(--blue), var(--accent), var(--green));
  --content-accent-hover: var(--accent-glow);
  --content-scroll-hover-bg: var(--accent-dim);
  --content-process-margin: 24px 0;
  --content-process-padding: 18px 0;
  --content-process-gap: 18px;
  --content-process-num-size: 34px;
  --content-process-num-bg: var(--content-nav-active-dim);
  --content-process-num-border: rgba(6,182,212,0.3);
  --content-process-num-color: var(--content-nav-active);
  --content-process-title-size: 14px;
  --content-process-desc-line-height: 1.6;
  --content-grid-margin: 20px 0;
  --content-card-padding: 16px;
  --content-card-tag-color: var(--cyan);
  --content-card-title-size: 13px;
  --content-card-desc-size: 12px;
  --content-table-margin: 20px 0;
  --content-table-th-padding: 11px 14px;
  --content-table-td-padding: 11px 14px;
  --content-code-margin: 20px 0;
  --content-code-padding: 18px;
  --content-nav-margin-top: 60px;
  --content-nav-padding-top: 28px;
  --content-related-padding: 12px;
  --content-related-line-height: 1.4;
  --content-param-section-margin: 20px;
  --content-param-row-padding: 8px 0;
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html {
  scroll-behavior: smooth;
  overflow-x: clip;
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  overflow-x: clip;
  min-height: 100vh;
  overflow-wrap: break-word;
  word-wrap: break-word;
}
/* Prevent canvas, SVG, and diagram-box from stretching layout width */
canvas, svg {
  max-width: 100% !important;
}
.diagram-box, [data-sc-visualizer] {
  max-width: 100% !important;
  box-sizing: border-box !important;
}
body::before {
  content:'';
  position:fixed;
  inset:0;
  background-image:
    linear-gradient(var(--grid-overlay) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-overlay) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events:none;
  z-index:0;
}

#read-progress-bar {
  position: fixed;
  top:0;
  left:0;
  z-index:9999;
  height: 3px;
  width: 0%;
  background: var(--content-progress-gradient);
  transition: width 0.1s linear;
}

.sc-nav {
  position: fixed;
  top:0;
  left:0;
  right:0;
  z-index:500;
  height: 64px;
  background: var(--glass-bg);
  backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 10px 32px rgba(0,0,0,0.18);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
}
.sc-nav-logo {
  font-family: var(--mono);
  font-size: 17px;
  color: var(--accent);
  letter-spacing: 3px;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}
.sc-nav-logo-dot {
  width:7px;
  height:7px;
  background:var(--accent);
  border-radius:50%;
  box-shadow: 0 0 10px var(--accent);
  animation: nav-pulse 2.5s ease-in-out infinite;
}
@keyframes nav-pulse {
  0%,100% { opacity:1; box-shadow:0 0 10px var(--accent); }
  50% { opacity:0.35; box-shadow:0 0 3px var(--accent); }
}
.sc-nav-links {
  display:flex;
  gap:4px;
  list-style:none;
  align-items:center;
}
.sc-nav-links a,
.sc-nav-links button {
  font-family: var(--display);
  font-size: 12px;
  font-weight:600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-mid);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 10px;
  transition: var(--tr);
  background:transparent;
  border:1px solid transparent;
  cursor:pointer;
}
.sc-nav-links a:hover,
.sc-nav-links button:hover {
  color:var(--text);
  background:rgba(255,255,255,0.04);
  border-color:rgba(255,255,255,0.04);
  transform:translateY(-1px);
}
.sc-nav-links a.active { color:var(--content-nav-active); background:var(--content-nav-active-dim); border-color:rgba(6,182,212,0.18); }
.sc-nav-right { display:flex; gap:8px; align-items:center; }
.sc-nav-badge {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--content-badge-color);
  border: 1px solid var(--content-badge-color);
  padding: 4px 10px;
  border-radius: 999px;
  letter-spacing: 1px;
  background: rgba(255,255,255,0.02);
}
.sc-nav-btn {
  width:36px;
  height:36px;
  border-radius:10px;
  background: var(--surface-1);
  border:1px solid var(--border);
  color:var(--text-mid);
  cursor:pointer;
  font-size:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:var(--tr);
  text-decoration:none;
}
.sc-nav-btn:hover { border-color:var(--border-b); color:var(--text); background:var(--surface-2); transform:translateY(-1px); box-shadow:var(--shadow-card); }
.sc-hamburger { display:none; }

.sc-user-badge {
  display:flex;
  align-items:center;
  gap:8px;
  padding:5px 12px 5px 6px;
  background:var(--surface-1);
  border:1px solid var(--border);
  border-radius:10px;
  cursor:pointer;
  transition:var(--tr);
  position:relative;
}
.sc-user-badge:hover { border-color:var(--border-b); background:var(--surface-2); box-shadow:var(--shadow-card); }
.sc-user-av {
  width:28px;
  height:28px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:11px;
  font-weight:700;
  color:#fff;
  flex-shrink:0;
}
.sc-user-name { font-size:12px; color:var(--text); white-space:nowrap; }
.sc-user-dropdown {
  position:absolute;
  top:calc(100% + 8px);
  right:0;
  background:var(--surface-2);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:6px 0;
  min-width:160px;
  z-index:9999;
  box-shadow:var(--shadow-float);
  animation: dropDown 0.18s ease both;
}
@keyframes dropDown {
  from { opacity:0; transform:translateY(-6px); }
  to { opacity:1; transform:translateY(0); }
}
.sc-user-dropdown a {
  display:block;
  padding:9px 16px;
  color:var(--text-mid);
  text-decoration:none;
  font-size:13px;
  transition:var(--tr);
}
.sc-user-dropdown a:hover { color:var(--text); background:rgba(255,255,255,0.04); }
.sc-user-dropdown hr { border:none; border-top:1px solid var(--border); margin:4px 0; }
.sc-user-dropdown .logout-link { color:var(--red); }
.sc-user-dropdown .logout-link:hover { background:var(--red-dim); }

.sc-mobile-nav {
  display:none;
  position:fixed;
  top:64px;
  left:0;
  right:0;
  z-index:498;
  background:rgba(8,15,20,0.96);
  backdrop-filter:blur(24px);
  border-bottom:1px solid var(--border);
  padding:16px 20px 18px;
  flex-direction:column;
  gap:4px;
  box-shadow:var(--shadow-float);
}
.sc-mobile-nav.open { display:flex; }
.sc-mobile-nav a {
  color:var(--text-mid);
  text-decoration:none;
  font-family:var(--display);
  font-size:13px;
  font-weight:600;
  letter-spacing:1px;
  padding:11px 12px;
  border-radius:10px;
  transition:var(--tr);
}
.sc-mobile-nav a:hover { color:var(--text); background:rgba(255,255,255,0.04); transform:translateX(2px); }

.toc-section { margin-bottom:24px; padding:0 20px; }
.toc-label {
  font-family:var(--mono);
  font-size:9px;
  color:var(--sub);
  letter-spacing:3px;
  text-transform:uppercase;
  margin-bottom:10px;
  padding-bottom:6px;
  border-bottom:1px solid var(--border);
}
.toc-list { list-style:none; display:flex; flex-direction:column; gap:2px; }
.toc-list a {
  font-size:12.5px;
  color:var(--text-mid);
  text-decoration:none;
  padding:7px 10px;
  border-left:2px solid transparent;
  border-radius:0 10px 10px 0;
  transition:var(--tr);
  display:block;
  line-height:1.4;
}
.toc-list a:hover {
  color:var(--text);
  background:rgba(255,255,255,0.03);
  border-left-color:var(--border-b);
}
.toc-list a.active {
  color:var(--content-nav-active);
  background:var(--content-nav-active-dim);
  border-left-color:var(--content-nav-active);
}

.callout {
  border:1px solid rgba(255, 255, 255, 0.05) !important;
  border-radius:16px !important;
  padding:22px 24px !important;
  margin:28px 0;
  display:flex;
  gap:16px;
  background:linear-gradient(135deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01)) !important;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2) !important;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.callout:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35) !important;
  border-color: rgba(255, 255, 255, 0.1) !important;
}
.callout.tip {
  border-left: 4px solid var(--green) !important;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), rgba(16, 185, 129, 0.01)) !important;
}
.callout.tip:hover {
  border-color: rgba(16, 185, 129, 0.2) !important;
  box-shadow: 0 16px 40px rgba(16, 185, 129, 0.06), 0 16px 40px rgba(0, 0, 0, 0.35) !important;
}
.callout.warning {
  border-left: 4px solid #f59e0b !important;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.05), rgba(245, 158, 11, 0.01)) !important;
}
.callout.warning:hover {
  border-color: rgba(245, 158, 11, 0.2) !important;
  box-shadow: 0 16px 40px rgba(245, 158, 11, 0.06), 0 16px 40px rgba(0, 0, 0, 0.35) !important;
}
.callout.info {
  border-left: 4px solid var(--accent) !important;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.05), rgba(6, 182, 212, 0.01)) !important;
}
.callout.info:hover {
  border-color: rgba(6, 182, 212, 0.2) !important;
  box-shadow: 0 16px 40px rgba(6, 182, 212, 0.06), 0 16px 40px rgba(0, 0, 0, 0.35) !important;
}
.callout-icon {
  width:36px;
  height:36px;
  border-radius:10px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:16px;
  flex-shrink:0;
  margin-top:2px;
  background:rgba(255, 255, 255, 0.03) !important;
  border: 1px solid rgba(255, 255, 255, 0.08) !important;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  transition: transform 0.3s ease;
}
.callout:hover .callout-icon {
  transform: scale(1.08) rotate(5deg);
}
.callout-title { font-family:var(--display); font-size:15px; font-weight:700; color:var(--text); margin-bottom:6px; }
.callout-text { font-size:14px; color:var(--text-mid); line-height:1.75; }
.callout-text a { color:var(--accent); }

.topic-table,
.fab-table {
  width:100%;
  border-collapse:collapse;
  margin:var(--content-table-margin);
  font-size:13px;
  border-radius:var(--radius);
  overflow:hidden;
}
.topic-table th,
.fab-table th {
  font-family:var(--mono);
  font-size:10px;
  letter-spacing:2px;
  color:var(--content-nav-active);
  text-align:left;
  padding:var(--content-table-th-padding);
  border-bottom:1px solid var(--border);
  background:rgba(6,182,212,0.05);
}
.topic-table td,
.fab-table td {
  padding:var(--content-table-td-padding);
  border-bottom:1px solid var(--border);
  color:var(--text);
  line-height:1.65;
}
.topic-table tr:last-child td,
.fab-table tr:last-child td { border-bottom:none; }
.topic-table tr:hover td,
.fab-table tr:hover td { background:var(--bg3); }
.topic-table td:first-child,
.fab-table td:first-child { font-family:var(--mono); font-size:12px; }

.process-steps { display:flex; flex-direction:column; gap:0; margin:var(--content-process-margin); }
.process-step {
  display:flex;
  gap:var(--content-process-gap);
  padding:var(--content-process-padding);
  border-bottom:1px solid var(--border);
  position:relative;
}
.process-step:hover { background:rgba(255,255,255,0.02); }
.process-step:last-child { border-bottom:none; }
.process-step-num {
  width:var(--content-process-num-size);
  height:var(--content-process-num-size);
  border-radius:50%;
  flex-shrink:0;
  background:var(--content-process-num-bg);
  border:1px solid var(--content-process-num-border);
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:var(--mono);
  font-size:12px;
  color:var(--content-process-num-color);
  margin-top:2px;
}
.process-step-title { font-family:var(--display); font-size:var(--content-process-title-size); font-weight:700; margin-bottom:6px; }
.process-step-desc { font-size:14px; color:var(--text-mid); line-height:1.75; }

.subtopic-grid,
.fab-grid { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin:var(--content-grid-margin); }
.subtopic-card,
.fab-card {
  background:var(--surface-1);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:18px;
  transition:var(--tr);
  box-shadow:var(--shadow-card);
}
.subtopic-card:hover,
.fab-card:hover { border-color:var(--content-accent-hover); background:var(--surface-2); transform:translateY(-3px); box-shadow:var(--shadow-float); }
.subtopic-tag,
.fab-card-tag { font-family:var(--mono); font-size:9px; color:var(--content-card-tag-color); letter-spacing:2px; margin-bottom:10px; }
.subtopic-title,
.fab-card-title { font-family:var(--display); font-size:15px; font-weight:700; color:var(--text); margin-bottom:7px; line-height:1.25; }
.subtopic-desc,
.fab-card-desc { font-size:13px; color:var(--text-mid); line-height:1.7; }

.code-block { background:#020609; border:1px solid var(--border); border-radius:var(--radius-lg); margin:28px 0; overflow:hidden; box-shadow:var(--shadow-card); }
.code-header {
  background:var(--bg3);
  padding:12px 16px;
  font-family:var(--mono);
  font-size:10px;
  color:var(--text-mid);
  letter-spacing:1.5px;
  border-bottom:1px solid var(--border);
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.code-copy-btn {
  background:rgba(255,255,255,0.02);
  border:1px solid var(--border);
  color:var(--sub);
  padding:4px 10px;
  border-radius:8px;
  cursor:pointer;
  font-size:10px;
  font-family:var(--mono);
  transition:var(--tr);
}
.code-copy-btn:hover { border-color:var(--accent); color:var(--accent); background:rgba(6,182,212,0.08); }
.code-body {
  padding:var(--content-code-padding);
  font-family:var(--mono);
  font-size:12.5px;
  line-height:1.9;
  overflow-x:auto;
  scrollbar-width:thin;
  scrollbar-color:var(--border) transparent;
}
.code-body .kw { color:#f472b6; }
.code-body .cm { color:var(--sub); font-style:italic; }
.code-body .nm { color:var(--green); }
.code-body .st { color:var(--cyan); }
.code-body .nu { color:#22d3ee; }

.topic-nav,
.fab-nav {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
  margin-top:var(--content-nav-margin-top);
  padding-top:var(--content-nav-padding-top);
  border-top:1px solid var(--border);
}
.topic-nav-btn,
.fab-nav-btn {
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:20px 22px;
  text-decoration:none;
  transition:var(--tr);
  display:block;
  background:linear-gradient(180deg, rgba(14,26,36,0.82), rgba(8,15,20,0.72));
  box-shadow:var(--shadow-card);
}
.topic-nav-btn:hover,
.fab-nav-btn:hover { border-color:var(--content-accent-hover); background:var(--card); transform:translateY(-2px); }
.topic-nav-btn.next,
.fab-nav-btn.next { text-align:right; }
.nav-direction { font-family:var(--mono); font-size:10px; color:var(--sub); letter-spacing:2px; margin-bottom:6px; }
.nav-title { font-family:var(--display); font-size:15px; font-weight:700; color:var(--text); line-height:1.3; }

.sr-label {
  font-family:var(--mono);
  font-size:9px;
  color:var(--sub);
  letter-spacing:3px;
  text-transform:uppercase;
  margin-bottom:12px;
  padding-bottom:8px;
  border-bottom:1px solid var(--border);
}
.related-card {
  background:var(--card);
  border:1px solid var(--border);
  border-radius:14px;
  padding:16px;
  margin-bottom:10px;
  text-decoration:none;
  display:block;
  transition:var(--tr);
}
.related-card:hover { border-color:var(--content-accent-hover); background:var(--card2); transform:translateY(-2px); }
.related-tag { font-family:var(--mono); font-size:9px; color:var(--cyan); letter-spacing:1.5px; margin-bottom:5px; }
.related-title { font-size:13px; color:var(--text); line-height:1.5; font-weight:600; }

.param-section { margin-top:var(--content-param-section-margin); }
.param-row {
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:10px 0;
  border-bottom:1px solid var(--border);
  gap:12px;
}
.param-row:last-child { border-bottom:none; }
.param-name { font-family:var(--mono); font-size:11px; color:var(--text-mid); }
.param-val { font-family:var(--mono); font-size:11px; color:var(--content-nav-active); }

#scroll-top {
  position:fixed;
  bottom:28px;
  right:28px;
  z-index:400;
  width:40px;
  height:40px;
  border-radius:10px;
  background:var(--card2);
  border:1px solid var(--border);
  color:var(--text-mid);
  cursor:pointer;
  font-size:15px;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:var(--tr);
  opacity:0;
  pointer-events:none;
}
#scroll-top.visible { opacity:1; pointer-events:all; }
#scroll-top:hover {
  border-color:var(--content-nav-active);
  color:var(--content-nav-active);
  background:var(--content-scroll-hover-bg);
}

@media(max-width:900px) {
  .sc-nav { padding:0 20px; }
  .sc-nav-links { display:none; }
  .sc-hamburger { display:flex; }
  .subtopic-grid,
  .fab-grid,
  .topic-nav,
  .fab-nav { grid-template-columns:1fr; }

  /* Hide badge in mobile viewport to prevent header overflow */
  .sc-nav-badge {
    display: none !important;
  }

  /* Make profile login widget compact on mobile */
  .profile-login-btn {
    padding: 0 !important;
    width: 36px !important;
    height: 36px !important;
    border-radius: 50% !important;
    justify-content: center !important;
  }
  .profile-login-btn .profile-text {
    display: none !important;
  }
  .profile-login-btn .profile-icon {
    font-size: 14px !important;
    margin: 0 !important;
  }

  /* Make logged in profile trigger compact on mobile */
  .profile-trigger {
    padding: 2px !important;
    gap: 0 !important;
  }
  .profile-arrow {
    display: none !important;
  }

  .sc-nav-right {
    gap: 4px !important;
  }
}

/* ── Floating Action Buttons (FABs) Responsive Grid Alignment ── */
/* Prevents floating buttons from overlapping fixed/sticky sidebars on desktop */

/* Mobile & Tablet: width <= 900px */
@media (max-width: 900px) {
  #oracle-fab {
    bottom: calc(20px + var(--safe-bottom)) !important;
    right: calc(20px + var(--safe-right)) !important;
  }
}

/* Desktop with Left TOC: 901px to 1200px */
@media (min-width: 901px) and (max-width: 1200px) {
  #oracle-fab {
    right: 30px !important;
    bottom: 30px !important;
  }
}

/* Desktop with Both Sidebars: 1201px to 1500px */
@media (min-width: 1201px) and (max-width: 1500px) {
  #oracle-fab {
    right: 30px !important;
    bottom: 30px !important;
  }
}

/* Widescreen: > 1500px */
@media (min-width: 1501px) {
  #oracle-fab {
    right: 30px !important;
    bottom: 30px !important;
  }
}