:root {
  --bg: #060816;
  --panel: rgba(11, 15, 31, 0.84);
  --panel-2: rgba(20, 28, 54, 0.82);
  --text: #ecf3ff;
  --muted: #91a1c7;
  --line: rgba(132, 174, 255, 0.18);
  --blue: #7fb0ff;
  --cyan: #69f0ff;
  --violet: #9e7bff;
  --amber: #ffbe68;
  --red: #ff6a83;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(900px 520px at 12% -4%, rgba(105, 240, 255, 0.12), transparent 60%),
    radial-gradient(1000px 640px at 100% 0%, rgba(158, 123, 255, 0.14), transparent 55%),
    linear-gradient(180deg, #060816 0%, #090d1f 100%);
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, transparent 0%, rgba(255,255,255,0.02) 45%, transparent 100%);
  transform: translateX(-40%);
  animation: sweep 16s linear infinite;
}
@keyframes sweep { to { transform: translateX(40%); } }

.page-shell {
  width: min(1100px, calc(100vw - 28px));
  margin: 0 auto;
  padding: 18px 0 44px;
  display: grid;
  gap: 14px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(12px);
  padding: 18px;
}

.hero {
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto -12% -35% auto;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(105, 240, 255, 0.14), transparent 68%);
}
.eyebrow, .mini {
  margin: 0 0 8px;
  font: 600 12px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--cyan);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  margin-bottom: 10px;
  font-size: clamp(30px, 5vw, 58px);
  line-height: 0.98;
  max-width: 920px;
}
.lede, .section-head p, .diagnostic-copy, .window-note, .agent-detail p, .takeaway-card li {
  color: var(--muted);
  line-height: 1.62;
}
.video-block {
  margin-top: 16px;
  border: 1px solid rgba(127, 176, 255, 0.18);
  border-radius: 18px;
  background: rgba(255,255,255,0.03);
  padding: 12px;
}
.video-title {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
#lang-video {
  width: 100%;
  display: block;
  border-radius: 12px;
  background: #000;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}
.metric-card {
  border: 1px solid rgba(127, 176, 255, 0.18);
  border-radius: 16px;
  background: rgba(255,255,255,0.03);
  padding: 12px;
  display: grid;
  gap: 6px;
}
.metric-card.warn { border-color: rgba(255, 190, 104, 0.36); }
.metric-value { font-size: 26px; font-weight: 700; }
.metric-label { font-size: 12px; color: var(--muted); }

.section-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 14px;
}
.section-head h2 { margin-bottom: 8px; font-size: clamp(22px, 3vw, 34px); }

.stress-card, .diagnostic-card, .window-card, .handoff-card, .agent-detail, .takeaway-card {
  border: 1px solid rgba(127, 176, 255, 0.16);
  border-radius: 18px;
  background: var(--panel-2);
  padding: 14px;
}
label {
  display: block;
  margin: 10px 0 6px;
  font-size: 12px;
  color: var(--muted);
}
input[type="range"] {
  width: 100%;
  accent-color: var(--cyan);
}
.preset-row, .mode-switch, .agent-rail {
  display: grid;
  gap: 8px;
}
.preset-row { grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 14px; }
.mode-switch { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.agent-rail { grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 14px; }
.preset-btn, .mode-btn, .agent-card {
  border: 1px solid rgba(127, 176, 255, 0.2);
  border-radius: 14px;
  background: rgba(255,255,255,0.03);
  color: var(--text);
  cursor: pointer;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease, box-shadow 140ms ease;
}
.preset-btn, .mode-btn { padding: 10px 8px; font-size: 12px; }
.preset-btn:hover, .mode-btn:hover, .agent-card:hover { transform: translateY(-1px); border-color: rgba(105, 240, 255, 0.48); }
.preset-btn.is-active, .mode-btn.is-active, .agent-card.is-active {
  border-color: rgba(105, 240, 255, 0.68);
  background: rgba(105, 240, 255, 0.11);
  box-shadow: 0 0 0 1px rgba(105, 240, 255, 0.14) inset;
}

.diagnostic-card {
  display: grid;
  align-content: start;
  gap: 10px;
}
.score-ring {
  width: 110px;
  aspect-ratio: 1;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at center, rgba(11,15,31,0.95) 54%, transparent 56%),
    conic-gradient(var(--red) 0deg, var(--amber) 120deg, var(--cyan) 260deg, rgba(255,255,255,0.08) 260deg 360deg);
  border: 1px solid rgba(255,255,255,0.08);
}
.score-ring span { font-size: 28px; font-weight: 700; }
.diagnostic-title { margin: 0; font-size: 18px; font-weight: 700; }
.bars { display: grid; gap: 10px; }
.bar-row {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 10px;
  align-items: center;
  font-size: 12px;
  color: var(--muted);
}
.bar-track {
  height: 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}
.bar-track span {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--amber), var(--red));
  transition: width 160ms ease;
}

.context-lab { display: grid; gap: 12px; }
.context-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 2px;
}
.window-title { margin: 0 0 10px; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.token-strip {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 6px;
}
.token-chip {
  height: 30px;
  border-radius: 10px;
  border: 1px solid rgba(127, 176, 255, 0.14);
  background: rgba(255,255,255,0.04);
}
.token-chip.hot { background: rgba(255, 106, 131, 0.2); border-color: rgba(255, 106, 131, 0.35); }
.token-chip.mid { background: rgba(255, 190, 104, 0.18); border-color: rgba(255, 190, 104, 0.3); }
.token-chip.cold { background: rgba(105, 240, 255, 0.14); border-color: rgba(105, 240, 255, 0.24); }
#handoffList { margin: 0; padding-left: 18px; color: var(--muted); line-height: 1.7; }

.agent-card {
  text-align: left;
  padding: 12px;
  display: grid;
  gap: 6px;
}
.agent-tag {
  width: max-content;
  padding: 3px 7px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  color: var(--cyan);
  font: 600 11px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
}
.agent-card strong { font-size: 16px; }
.agent-card span:last-child { color: var(--muted); font-size: 13px; }
.detail-kicker {
  margin-bottom: 6px;
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
#detailBullets { margin: 0; padding-left: 18px; color: var(--muted); line-height: 1.7; }

.cost-grid { align-items: start; }
.cost-stack { display: grid; gap: 10px; margin-top: 14px; }
.cost-row {
  border: 1px solid rgba(127, 176, 255, 0.16);
  border-radius: 14px;
  background: rgba(255,255,255,0.03);
  padding: 10px 12px;
}
.cost-row-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 13px;
}
.cost-row-head strong { font-size: 15px; }
.cost-bar {
  height: 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}
.cost-bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--violet), var(--blue), var(--cyan));
}
.cost-meta {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
}
.takeaway-card ul { margin: 10px 0 0; padding-left: 18px; }
.source-link {
  display: inline-block;
  margin-top: 14px;
  color: var(--cyan);
  text-decoration: none;
}
.source-link:hover { text-decoration: underline; }

@media (max-width: 860px) {
  .hero-metrics,
  .section-grid,
  .context-visual,
  .agent-rail { grid-template-columns: 1fr; }
  .bar-row { grid-template-columns: 1fr; }
}