:root {
  --bg: #f4f0e8;
  --surface: rgba(255, 253, 248, 0.82);
  --surface-strong: rgba(255, 252, 245, 0.96);
  --ink: #111111;
  --muted: #5a544a;
  --line: rgba(17, 17, 17, 0.1);
  --accent: #9f4f28;
  --accent-soft: rgba(159, 79, 40, 0.12);
  --founder: #c1783e;
  --team: #2f6a63;
  --shadow: 0 34px 90px rgba(55, 36, 20, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "IBM Plex Sans", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(159, 79, 40, 0.16), transparent 25%),
    radial-gradient(circle at 88% 14%, rgba(47, 106, 99, 0.12), transparent 18%),
    linear-gradient(180deg, #e9e1d3 0%, #f4efe6 44%, #efe9de 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(17, 17, 17, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 17, 17, 0.03) 1px, transparent 1px);
  background-size: 28px 28px;
}

.page-shell {
  position: relative;
  z-index: 1;
  max-width: 1600px;
  margin: 0 auto;
  padding: 22px;
}

.hero,
.panel,
.viewer-frame,
.note-panel {
  background: var(--surface);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) 360px;
  gap: 24px;
  padding: 38px;
  border-radius: 34px;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1,
.panel h2,
.panel h3,
.note-panel h3 {
  margin: 0;
  font-family: "Sora", sans-serif;
}

.hero h1 {
  max-width: 11ch;
  font-size: clamp(2.4rem, 5vw, 4.7rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.hero-text {
  max-width: 62ch;
  margin: 16px 0 0;
  font-size: 1.04rem;
  line-height: 1.7;
  color: var(--muted);
}

.hero-metrics {
  display: grid;
  gap: 12px;
  align-content: end;
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.62);
}

.metric span,
.panel p,
.panel li,
.note-panel p {
  color: var(--muted);
}

.workspace {
  display: grid;
  grid-template-columns: 430px minmax(0, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.sidebar {
  display: grid;
  gap: 16px;
  align-content: start;
}

.panel {
  border-radius: 28px;
  padding: 22px;
}

.panel-head p {
  margin-bottom: 8px;
}

.panel-head h2 {
  font-size: 1.35rem;
  line-height: 1.1;
}

.room-summary {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.room-card {
  padding: 18px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.62);
}

.room-card.founder {
  border-left: 5px solid var(--founder);
}

.room-card.team {
  border-left: 5px solid var(--team);
}

.room-card h3 {
  margin-bottom: 10px;
}

.room-card ul,
.list-grid ul,
.assumptions ul {
  margin: 0;
  padding-left: 18px;
  line-height: 1.6;
}

.list-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 18px;
}

.list-grid h4 {
  margin: 0 0 8px;
  font-family: "Sora", sans-serif;
}

.viewer-shell {
  display: grid;
  gap: 14px;
}

.viewer-tabs {
  display: inline-flex;
  gap: 8px;
}

.tab {
  border: none;
  border-radius: 999px;
  padding: 11px 16px;
  font: inherit;
  cursor: pointer;
  background: rgba(17, 17, 17, 0.06);
  color: var(--ink);
}

.tab.is-active {
  background: var(--ink);
  color: #fffaf5;
}

.viewer-frame {
  border-radius: 28px;
  overflow: hidden;
}

.viewer-panel {
  display: none;
  min-height: 760px;
  background:
    linear-gradient(180deg, rgba(255, 254, 250, 0.96), rgba(250, 247, 241, 0.9));
}

.viewer-panel.is-visible {
  display: block;
}

#planSvg,
#threeCanvas canvas {
  width: 100%;
  height: 760px;
  display: block;
}

#threeCanvas {
  width: 100%;
  height: 760px;
}

.viewer-error {
  display: grid;
  place-items: center;
  min-height: 760px;
  padding: 24px;
  text-align: center;
  color: var(--muted);
  line-height: 1.7;
}

.viewer-note {
  padding: 12px 18px 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.notes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.note-panel {
  border-radius: 24px;
  padding: 20px;
}

.note-panel p {
  margin: 12px 0 0;
  line-height: 1.7;
}

@media (max-width: 1200px) {
  .hero,
  .workspace {
    grid-template-columns: 1fr;
  }

  .sidebar {
    order: 2;
  }

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

@media (max-width: 720px) {
  .page-shell {
    padding: 12px;
  }

  .hero,
  .panel,
  .note-panel {
    padding: 18px;
    border-radius: 24px;
  }

  .viewer-frame {
    border-radius: 22px;
  }

  .viewer-panel,
  #planSvg,
  #threeCanvas,
  #threeCanvas canvas {
    min-height: 560px;
    height: 560px;
  }
}