:root {
  color-scheme: dark;
  --bg: #0b0b0f;
  --panel: #15151d;
  --panel-alt: #1a1a24;
  --text: #f0ede6;
  --muted: #b7b0a2;
  --gold: #c7a76a;
  --ember: #b45a3f;
  --border: #2a2a35;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(1200px 500px at 20% -20%, #24202d 0%, var(--bg) 70%);
  color: var(--text);
  font-family: Inter, Segoe UI, Arial, sans-serif;
  line-height: 1.5;
}

.hero-wrap,
main {
  width: min(1080px, 92vw);
  margin: 0 auto;
}

.hero-wrap {
  padding: 2.6rem 0 1.2rem;
}

.hero-wrap.compact {
  padding-bottom: 0.6rem;
}

.brand-banner {
  display: block;
  width: 100%;
  height: auto;
  max-width: 980px;
  max-height: 280px;
  object-fit: contain;
  object-position: center;
  border: 1px solid var(--border);
  border-radius: 14px;
  margin: 0 auto 0.9rem;
}

@media (max-width: 520px) {
  .hero-wrap {
    padding-top: 1.4rem;
  }

  .brand-banner {
    max-height: 170px;
    margin-bottom: 0.7rem;
  }
}

.brand-row {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.logo-slot {
  border: 1px dashed var(--gold);
  color: var(--gold);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  border-radius: 10px;
  padding: 0.45rem 0.7rem;
  background: rgba(199, 167, 106, 0.08);
}

.kicker {
  color: var(--gold);
  font-weight: 700;
  margin: 0 0 0.2rem;
}

h1 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
}

.subhead {
  max-width: 760px;
  color: var(--muted);
}

main {
  padding-bottom: 2rem;
}

.panel {
  background: linear-gradient(180deg, var(--panel-alt), var(--panel));
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem;
  margin: 0.85rem 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 0.8rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 0.8rem;
}

.card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.75rem;
  background: rgba(0, 0, 0, 0.18);
}

.diagram {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.7rem;
  overflow-x: auto;
  overflow-y: hidden;
}

.diagram svg {
  display: block;
  width: 1600px;
  max-width: none;
  height: auto;
  margin: 0 auto;
}

@media (max-width: 900px) {
  .diagram svg {
    width: 1200px;
  }
}

@media (max-width: 520px) {
  .diagram svg {
    width: 980px;
  }
}

.cta-row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-top: 0.85rem;
}

.btn {
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.48rem 0.85rem;
  color: var(--text);
  text-decoration: none;
  background: #232330;
  cursor: pointer;
}

.btn.primary {
  border-color: var(--gold);
  color: #241f12;
  background: linear-gradient(180deg, #d3b57b, #b89350);
  font-weight: 700;
}

.chat-log {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #0f0f16;
  min-height: 300px;
  max-height: 480px;
  overflow: auto;
  padding: 0.8rem;
}

.bubble {
  margin: 0.55rem 0;
  padding: 0.6rem 0.7rem;
  border-radius: 10px;
  max-width: 90%;
  white-space: pre-wrap;
}

.bubble.user {
  margin-left: auto;
  background: #2b2830;
  border: 1px solid #3d3842;
}

.bubble.ai {
  margin-right: auto;
  background: #1f202a;
  border: 1px solid #313242;
}

.chat-controls {
  margin-top: 0.65rem;
}

input[type="password"] {
  width: 100%;
  background: #0e0f15;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 0.58rem;
}

textarea {
  width: 100%;
  background: #0e0f15;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 0.6rem;
  resize: vertical;
}

.note {
  border-left: 4px solid var(--ember);
}

.muted {
  color: var(--muted);
}

a {
  color: #e7c98f;
}