/* ================================================================
   OCG Governance Dashboard — Dark Modern Theme
   ================================================================ */

/* ---- Variables ---- */
:root {
  --bg0: #050810;
  --bg1: #0a0f1e;
  --bg2: #111827;
  --card: rgba(255,255,255,0.038);
  --card-h: rgba(255,255,255,0.065);
  --bdr: rgba(255,255,255,0.08);
  --bdr-h: rgba(255,255,255,0.15);
  --bdr-blue: rgba(79,142,247,0.4);
  --bdr-green: rgba(34,211,160,0.35);
  --bdr-red: rgba(248,113,113,0.35);
  --bdr-amber: rgba(245,158,11,0.35);
  --bdr-purple: rgba(167,139,250,0.35);

  --t1: #e2e8f4;
  --t2: #8892a4;
  --t3: #4a5568;
  --t4: #2d3748;

  --blue: #4f8ef7;
  --green: #22d3a0;
  --purple: #a78bfa;
  --amber: #f59e0b;
  --red: #f87171;

  --bg-blue: rgba(79,142,247,0.1);
  --bg-green: rgba(34,211,160,0.08);
  --bg-red: rgba(248,113,113,0.08);
  --bg-purple: rgba(167,139,250,0.1);
  --bg-amber: rgba(245,158,11,0.09);

  --glow-blue: 0 0 20px rgba(79,142,247,0.25), 0 0 50px rgba(79,142,247,0.08);
  --glow-green: 0 0 20px rgba(34,211,160,0.25), 0 0 50px rgba(34,211,160,0.08);
  --glow-red: 0 0 20px rgba(248,113,113,0.25);

  --font: 'Inter', -apple-system, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  --ease: cubic-bezier(0.4,0,0.2,1);
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 22px;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { width: 100%; min-height: 100%; overflow-x: hidden; }
body {
  font-family: var(--font);
  background: var(--bg0);
  color: var(--t1);
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(ellipse 80% 50% at 10% 0%, rgba(79,142,247,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 90% 100%, rgba(34,211,160,0.06) 0%, transparent 60%);
}

/* ---- Canvas Background ---- */
#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
}

/* ---- App shell ---- */
.app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ================================================================
   HEADER
   ================================================================ */
.hdr {
  position: sticky;
  top: 0;
  z-index: 200;
  height: 62px;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 28px;
  background: rgba(5,8,16,0.88);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border-bottom: 1px solid var(--bdr);
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, rgba(79,142,247,0.25), rgba(34,211,160,0.2));
  border: 1px solid rgba(79,142,247,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  background-clip: padding-box;
  color: var(--blue);
  letter-spacing: -0.03em;
}

.brand-name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.025em;
  background: linear-gradient(120deg, var(--blue) 0%, var(--green) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-sep {
  width: 1px;
  height: 16px;
  background: var(--bdr);
}

.brand-sub {
  font-size: 12px;
  color: var(--t3);
  white-space: nowrap;
}

/* Nav */
.nav {
  flex: 1;
  display: flex;
  justify-content: center;
  gap: 3px;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 6px 15px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  font-size: 13px;
  font-family: var(--font);
  font-weight: 500;
  color: var(--t3);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.nav-btn:hover {
  color: var(--t2);
  background: rgba(255,255,255,0.04);
  border-color: var(--bdr);
}

.nav-btn.active {
  color: var(--t1);
  background: var(--bg-blue);
  border-color: var(--bdr-blue);
  box-shadow: var(--glow-blue);
}

.nav-num {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 600;
  background: var(--bdr);
  color: var(--t3);
  flex-shrink: 0;
  transition: all 0.2s var(--ease);
}

.nav-btn.active .nav-num {
  background: var(--bg-blue);
  color: var(--blue);
  border: 1px solid var(--bdr-blue);
}

/* Status */
.hdr-right {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--t3);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px rgba(34,211,160,0.8);
  animation: pdot 2.5s ease-in-out infinite;
}

@keyframes pdot {
  0%, 100% { box-shadow: 0 0 6px rgba(34,211,160,0.6); opacity: 1; }
  50% { box-shadow: 0 0 18px rgba(34,211,160,1), 0 0 36px rgba(34,211,160,0.3); opacity: 0.7; }
}

/* Language toggle button */
.lang-btn {
  font-family: var(--font);
  font-size: 12px;
  font-weight: 500;
  padding: 5px 13px;
  background: rgba(79,142,247,0.08);
  border: 1px solid rgba(79,142,247,0.22);
  color: var(--blue);
  border-radius: var(--r-md);
  cursor: pointer;
  transition: background 0.2s;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}
.lang-btn:hover { background: rgba(79,142,247,0.18); }

/* ================================================================
   MAIN / PANELS
   ================================================================ */
.main {
  flex: 1;
  padding: 36px 32px;
  max-width: 1240px;
  margin: 0 auto;
  width: 100%;
}

.panel { display: none; }

.panel.active {
  display: block;
  animation: panel-enter 0.45s var(--ease) both;
}

@keyframes panel-enter {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Panel heading */
.ph { margin-bottom: 32px; }

.ph-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 10px;
}

.ph-tag::before {
  content: '';
  width: 22px;
  height: 1px;
  background: currentColor;
  display: block;
}

.ph-title {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin-bottom: 12px;
}

.ph-title span {
  background: linear-gradient(120deg, var(--blue), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ph-desc {
  font-size: 14px;
  color: var(--t2);
  line-height: 1.85;
  max-width: 680px;
}

/* ================================================================
   CARDS
   ================================================================ */
.card {
  background: var(--card);
  border: 1px solid var(--bdr);
  border-radius: var(--r-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  overflow: hidden;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.card:hover { background: var(--card-h); border-color: var(--bdr-h); }
.card-red { background: rgba(248,113,113,0.04); border-color: rgba(248,113,113,0.18); }
.card-red:hover { background: rgba(248,113,113,0.07); }
.card-green { background: rgba(34,211,160,0.04); border-color: rgba(34,211,160,0.18); }
.card-green:hover { background: rgba(34,211,160,0.07); }
.card-blue { background: var(--bg-blue); border-color: var(--bdr-blue); }

.ch {
  padding: 14px 18px;
  border-bottom: 1px solid var(--bdr);
  display: flex;
  align-items: center;
  gap: 10px;
}

.ch-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  flex-shrink: 0;
}

.icon-red { background: var(--bg-red); }
.icon-green { background: var(--bg-green); }
.icon-blue { background: var(--bg-blue); }
.icon-amber { background: var(--bg-amber); }
.icon-purple { background: var(--bg-purple); }

.ch-title { font-size: 13px; font-weight: 600; color: var(--t1); }
.ch-sub { font-size: 11px; color: var(--t3); margin-left: auto; }

.cb { padding: 18px; }
.cb-sm { padding: 14px 18px; }

/* ================================================================
   GRIDS
   ================================================================ */
.g2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.g3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.g2l { display: grid; grid-template-columns: 3fr 2fr; gap: 20px; }

/* ================================================================
   BADGES
   ================================================================ */
.bdg {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 20px;
  letter-spacing: 0.01em;
  flex-shrink: 0;
}

.bdg-r { background: rgba(248,113,113,0.12); color: var(--red); border: 1px solid rgba(248,113,113,0.25); }
.bdg-g { background: rgba(34,211,160,0.1); color: var(--green); border: 1px solid rgba(34,211,160,0.25); }
.bdg-b { background: var(--bg-blue); color: var(--blue); border: 1px solid rgba(79,142,247,0.25); }
.bdg-p { background: var(--bg-purple); color: var(--purple); border: 1px solid rgba(167,139,250,0.25); }
.bdg-a { background: var(--bg-amber); color: var(--amber); border: 1px solid rgba(245,158,11,0.25); }

/* ================================================================
   INSIGHT BAR
   ================================================================ */
.insight {
  margin-top: 22px;
  padding: 14px 20px;
  background: var(--card);
  border: 1px solid var(--bdr);
  border-left: 3px solid var(--blue);
  border-radius: var(--r-md);
  font-size: 13px;
  color: var(--t2);
  line-height: 1.8;
}

.insight strong { color: var(--t1); font-weight: 600; }

/* ================================================================
   BUTTONS
   ================================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  font-size: 12px;
  font-family: var(--font);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  letter-spacing: 0.01em;
}

.btn:disabled { opacity: 0.4; cursor: not-allowed; pointer-events: none; }

.btn-red { background: var(--bg-red); color: var(--red); border-color: rgba(248,113,113,0.3); }
.btn-red:hover { background: rgba(248,113,113,0.16); box-shadow: var(--glow-red); }

.btn-green { background: var(--bg-green); color: var(--green); border-color: rgba(34,211,160,0.3); }
.btn-green:hover { background: rgba(34,211,160,0.16); box-shadow: var(--glow-green); }

.btn-ghost { background: transparent; color: var(--t3); border-color: var(--bdr); }
.btn-ghost:hover { background: var(--card); color: var(--t2); border-color: var(--bdr-h); }

.ctrl-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--bdr);
  background: rgba(0,0,0,0.2);
}

.ctrl-label { font-size: 12px; color: var(--t3); flex: 1; }

/* ================================================================
   GRAPH STAGE (Panel 1)
   ================================================================ */
.graph-stage {
  padding: 24px 20px;
  min-height: 460px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.graph-stage svg { width: 100%; max-width: 400px; height: auto; }

/* Graph states */
#concept-graph .edge-problem-line {
  transition: stroke 0.5s var(--ease), stroke-opacity 0.5s var(--ease),
              filter 0.5s var(--ease);
}

#concept-graph .edge-problem-label {
  transition: fill 0.5s var(--ease), opacity 0.5s var(--ease);
}

#concept-graph .scaffold-node {
  opacity: 0;
  transform-origin: 200px 280px;
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

#concept-graph .scaffold-edge {
  stroke-dasharray: 120;
  stroke-dashoffset: 120;
  transition: stroke-dashoffset 0.6s var(--ease);
}

#concept-graph.diagnosed .edge-problem-line {
  stroke: var(--red) !important;
  filter: drop-shadow(0 0 6px rgba(248,113,113,0.8));
}

#concept-graph.diagnosed .edge-problem-label {
  fill: var(--red) !important;
}

#concept-graph.fixed .edge-problem-line { opacity: 0; }
#concept-graph.fixed .edge-problem-label { opacity: 0; }
#concept-graph.fixed .scaffold-node { opacity: 1; }
#concept-graph.fixed .scaffold-edge { stroke-dashoffset: 0; }

/* Status messages in graph */
.graph-status { display: none; }
.graph-status.visible { display: flex; }

/* ================================================================
   TIMELINE (Panel 3)
   ================================================================ */
.timeline { display: flex; flex-direction: column; }

.tl-item {
  display: flex;
  gap: 14px;
  position: relative;
}

.tl-item:not(:last-child)::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 30px;
  bottom: 0;
  width: 1px;
  background: var(--bdr);
}

.tl-dot {
  position: relative;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
  z-index: 1;
  transition: all 0.2s var(--ease);
}

.tl-dot.done {
  background: rgba(34,211,160,0.12);
  color: var(--green);
  border: 1px solid rgba(34,211,160,0.35);
}

.tl-dot.active-s {
  background: var(--bg-blue);
  color: var(--blue);
  border: 1px solid var(--bdr-blue);
  animation: step-pulse 2s ease-in-out infinite;
}

.tl-dot.pending {
  background: var(--card);
  color: var(--t4);
  border: 1px solid var(--bdr);
}

@keyframes step-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(79,142,247,0); }
  50% { box-shadow: 0 0 0 6px rgba(79,142,247,0.15), 0 0 16px rgba(79,142,247,0.2); }
}

.tl-body { padding: 2px 0 22px; }
.tl-title { font-size: 13px; font-weight: 600; color: var(--t1); margin-bottom: 3px; }
.tl-desc { font-size: 12px; color: var(--t3); line-height: 1.65; }

/* ================================================================
   CODE BLOCK
   ================================================================ */
.codeblk {
  background: rgba(0,0,0,0.45);
  border: 1px solid var(--bdr);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.codeblk-hdr {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--bdr);
}

.mac-dot { width: 10px; height: 10px; border-radius: 50%; }
.mac-dot:nth-child(1) { background: #ff5f57; }
.mac-dot:nth-child(2) { background: #febc2e; }
.mac-dot:nth-child(3) { background: #28c840; }

.codeblk-fname {
  margin-left: 8px;
  font-size: 11px;
  color: var(--t3);
  font-family: var(--mono);
}

.codeblk-body {
  padding: 16px 20px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 2.1;
}

.code-line { display: block; }
.ck { color: var(--t3); }
.cv { color: var(--t1); }
.ct { color: var(--blue); }
.cs { color: var(--green); }
.cd { color: var(--amber); }
.cp { color: var(--purple); }
.cr { color: var(--red); }

/* ================================================================
   COMPARISON LIST
   ================================================================ */
.cmp-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--bdr);
  font-size: 12px;
  color: var(--t2);
  line-height: 1.6;
}

.cmp-row:last-child { border-bottom: none; }

/* ================================================================
   SVG UTILITIES
   ================================================================ */
.viz svg { width: 100%; height: auto; display: block; }

/* Tree lines animation */
.tree-branch {
  stroke-dasharray: 300;
  stroke-dashoffset: 300;
  transition: stroke-dashoffset 0.7s var(--ease);
}

.tree-branch.drawn { stroke-dashoffset: 0; }

/* ================================================================
   MISC
   ================================================================ */
.divider { height: 1px; background: var(--bdr); margin: 24px 0; }
.spacer { height: 20px; }
.spacer-sm { height: 12px; }

.text-blue { color: var(--blue); }
.text-green { color: var(--green); }
.text-red { color: var(--red); }
.text-purple { color: var(--purple); }
.text-amber { color: var(--amber); }
.text-dim { color: var(--t3); }
.text-mono { font-family: var(--mono); font-size: 11px; }

/* ================================================================
   SCROLLBAR
   ================================================================ */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg0); }
::-webkit-scrollbar-thumb { background: var(--bdr-h); border-radius: 3px; }

/* ================================================================
   ANIMATIONS
   ================================================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes glow-pulse {
  0%, 100% { filter: drop-shadow(0 0 3px currentColor); }
  50% { filter: drop-shadow(0 0 10px currentColor); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 900px) {
  .g2, .g2l { grid-template-columns: 1fr; }
  .g3 { grid-template-columns: 1fr 1fr; }
  .nav-btn .nav-label { display: none; }
  .brand-sub { display: none; }
  .main { padding: 20px 16px; }
  .hdr { padding: 0 16px; }
}

@media (max-width: 600px) {
  .g3 { grid-template-columns: 1fr; }
  .ph-title { font-size: 24px; }
}