/* ─── Variables ───────────────────────────────────────────── */
:root {
  --bg: #080A0D;
  --surface: #0E1117;
  --surface2: #131720;
  --surface3: #1A1F2E;
  --border: #1C2030;
  --border2: #252B3B;
  --amber: #F5A623;
  --amber-dim: rgba(245,166,35,0.12);
  --amber-glow: rgba(245,166,35,0.06);
  --teal: #00E5C3;
  --teal-dim: rgba(0,229,195,0.12);
  --red: #E84040;
  --red-dim: rgba(232,64,64,0.12);
  --text: #E8EAF0;
  --text-muted: #6B7280;
  --text-dim: #3D4455;
  --font-head: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* ─── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ─── Nav ────────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8,10,13,0.85);
  backdrop-filter: blur(12px);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  color: var(--text);
}

.nav-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 3px 8px;
  border: 1px solid var(--amber-dim);
  color: var(--amber);
  border-radius: 3px;
  letter-spacing: 0.05em;
}

.nav-right {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* ─── Hero ───────────────────────────────────────────────── */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  padding: 80px 48px 80px;
  max-width: 1400px;
  margin: 0 auto;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.tag-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 8px var(--teal);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-title {
  font-family: var(--font-head);
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 1.0;
  color: var(--text);
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 460px;
  margin-bottom: 40px;
}

/* Terminal */
.hero-terminal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  max-width: 480px;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
}

.terminal-dot { width: 10px; height: 10px; border-radius: 50%; }
.terminal-dot.r { background: #E84040; }
.terminal-dot.y { background: #F5A623; }
.terminal-dot.g { background: #00E5C3; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-left: 8px;
}

.terminal-body { padding: 16px 20px; display: flex; flex-direction: column; gap: 8px; }

.t-row {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  align-items: baseline;
}

.t-label { color: var(--text-dim); font-weight: 500; }
.t-val { font-weight: 500; font-size: 0.75rem; }
.t-val.accent { color: var(--amber); }
.t-val.teal { color: var(--teal); }
.t-comment { color: var(--text-dim); font-size: 0.65rem; }

/* Dashboard mock */
.dashboard-mock {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0,0,0,0.5), 0 0 0 1px rgba(245,166,35,0.06);
}

.dash-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}

.dash-title {
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.dash-state {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  padding: 3px 8px;
  border: 1px solid var(--teal-dim);
  color: var(--teal);
  border-radius: 3px;
  letter-spacing: 0.1em;
}

.dash-nav {
  display: flex;
  gap: 0;
  padding: 0 18px;
  border-bottom: 1px solid var(--border);
}

.dash-tab {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 10px 14px;
  color: var(--text-muted);
  cursor: default;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.dash-tab.active {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.positions { padding: 12px 18px; }

.pos-header {
  display: grid;
  grid-template-columns: 1fr 0.6fr 0.8fr 0.8fr;
  gap: 8px;
  padding: 6px 0;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.pos-row {
  display: grid;
  grid-template-columns: 1fr 0.6fr 0.8fr 0.8fr;
  gap: 8px;
  padding: 7px 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  align-items: center;
  border-bottom: 1px solid var(--border);
}

.pos-row:last-child { border-bottom: none; }
.pos-sym { color: var(--amber); font-weight: 500; }
.pos-qty { color: var(--text); }
.pos-price { color: var(--text-muted); }
.pos-pnl { font-size: 0.68rem; font-weight: 500; }
.pos-pnl.positive { color: var(--teal); }
.pos-pnl.neutral { color: var(--text-muted); }
.pos-pnl.negative { color: var(--red); }

.dash-risk {
  display: flex;
  gap: 0;
  padding: 0 18px;
  border-top: 1px solid var(--border);
}

.risk-item {
  flex: 1;
  padding: 10px 0;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.risk-item:last-child { border-right: none; }

.risk-label { font-family: var(--font-mono); font-size: 0.58rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; }
.risk-val { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text); font-weight: 500; }
.risk-limit { font-family: var(--font-mono); font-size: 0.58rem; }
.risk-limit.accent { color: var(--amber); }
.risk-limit.teal { color: var(--teal); }

.dash-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 18px;
  border-top: 1px solid var(--border);
  background: var(--surface2);
}

.dash-time { font-family: var(--font-mono); font-size: 0.6rem; color: var(--text-dim); }

.dash-conn {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--teal);
}

.conn-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 6px var(--teal);
}

/* ─── Shared Section Styles ───────────────────────────────── */
section { padding: 80px 48px; max-width: 1400px; margin: 0 auto; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  display: block;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 580px;
  line-height: 1.7;
  margin-bottom: 48px;
}

/* ─── Risk Engine ─────────────────────────────────────────── */
.section-risk { border-top: 1px solid var(--border); }

.flow-diagram { margin-bottom: 48px; }

.flow-row {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 24px;
}

.flow-row-sub { margin-bottom: 0; }

.flow-node {
  padding: 16px 20px;
  border-radius: 6px;
  min-width: 140px;
  flex: 0 0 auto;
}

.flow-node.target { background: var(--surface2); border: 1px solid var(--border2); }
.flow-node.construct { background: var(--surface2); border: 1px solid var(--border2); }
.flow-node.risk {
  background: var(--amber-dim);
  border: 1px solid rgba(245,166,35,0.3);
}
.flow-node.submit { background: var(--surface2); border: 1px solid var(--border2); }

.fn-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 2px;
}

.flow-node.risk .fn-label { color: var(--amber); }

.fn-sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-dim);
}

.flow-arrow { padding: 0 4px; }

.flow-outcomes {
  display: flex;
  gap: 24px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.outcome {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.out-icon { display: flex; align-items: center; }

.risk-limits { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 28px; }

.limits-title {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 20px;
}

.limits-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.limit-item {
  padding: 12px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.lim-name {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.lim-val {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
}

.lim-val.accent { color: var(--amber); }
.lim-val.teal { color: var(--teal); }

.limits-note {
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ─── States ─────────────────────────────────────────────── */
.section-states { border-top: 1px solid var(--border); }

.state-flow { margin-bottom: 40px; }

.state-track {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 16px;
}

.state-node {
  padding: 12px 16px;
  border-radius: 6px;
  border: 1px solid var(--border2);
  background: var(--surface2);
  min-width: 130px;
}

.state-name {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 3px;
  letter-spacing: 0.06em;
}

.state-desc {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-dim);
}

.state-node.paper {
  border-color: rgba(0,229,195,0.3);
  background: var(--teal-dim);
}

.state-node.paper .state-name { color: var(--teal); }

.state-badge {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  padding: 2px 6px;
  background: var(--teal-dim);
  border: 1px solid rgba(0,229,195,0.3);
  color: var(--teal);
  border-radius: 3px;
  display: inline-block;
  margin-top: 4px;
  letter-spacing: 0.05em;
}

.state-arrow { padding: 0 6px; }

.state-alerts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.alert-item {
  display: flex;
  gap: 14px;
  padding: 18px 20px;
  border-radius: 6px;
  border: 1px solid;
}

.alert-item.halted {
  background: var(--red-dim);
  border-color: rgba(232,64,64,0.2);
}

.alert-item.paused {
  background: var(--amber-dim);
  border-color: rgba(245,166,35,0.2);
}

.alert-item.retired {
  background: var(--surface2);
  border-color: var(--border2);
}

.alert-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  margin-bottom: 4px;
  letter-spacing: 0.06em;
}

.halted .alert-title { color: var(--red); }
.paused .alert-title { color: var(--amber); }
.retired .alert-title { color: var(--text-dim); }

.alert-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ─── Architecture ────────────────────────────────────────── */
.section-arch { border-top: 1px solid var(--border); }

.arch-diagram {
  display: flex;
  align-items: stretch;
  gap: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 32px;
  min-height: 260px;
}

.arch-layer {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.arch-layer-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.arch-components {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.arch-comp {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  padding: 8px 10px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 4px;
}

.arch-comp-box {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  padding: 12px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 4px;
  line-height: 1.6;
}

.arch-comp-box.danger {
  background: var(--red-dim);
  border-color: rgba(232,64,64,0.2);
  color: var(--text-muted);
}

.arch-note {
  display: block;
  font-size: 0.62rem;
  color: var(--text-dim);
  margin-top: 6px;
}

.arch-brokers {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.arch-broker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 8px 10px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
}

.arch-broker.active { color: var(--teal); }

.broker-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 6px var(--teal);
  flex-shrink: 0;
}

.broker-dot.dim {
  background: var(--text-dim);
  box-shadow: none;
}

.arch-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  flex-shrink: 0;
}

.arch-specs {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.spec-item {
  display: flex;
  gap: 24px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  align-items: baseline;
}

.spec-item:last-child { border-bottom: none; }

.spec-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  min-width: 80px;
  flex-shrink: 0;
}

.spec-val {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ─── Principles ──────────────────────────────────────────── */
.section-principles { border-top: 1px solid var(--border); }

.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.principle {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.principle-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 300;
  color: var(--text-dim);
  margin-bottom: 16px;
  line-height: 1;
}

.principle-title {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  line-height: 1.3;
}

.principle-body {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ─── Closing ─────────────────────────────────────────────── */
.section-closing {
  border-top: 1px solid var(--border);
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.closing-title {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  line-height: 1.2;
}

.closing-body {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 40px;
}

.closing-specs {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  text-align: left;
}

.close-item {
  display: flex;
  gap: 24px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  align-items: baseline;
}

.close-item:last-child { border-bottom: none; }

.close-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  min-width: 70px;
  flex-shrink: 0;
}

.close-val {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ─── Footer ─────────────────────────────────────────────── */
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 48px;
  border-top: 1px solid var(--border);
  max-width: 1400px;
  margin: 0 auto;
  gap: 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.footer-note {
  font-size: 0.78rem;
  color: var(--text-dim);
  text-align: center;
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-dim);
}

/* ─── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero { grid-template-columns: 1fr; gap: 48px; padding: 60px 32px; }
  .hero-right { order: -1; }
  section { padding: 60px 32px; }
  .limits-grid { grid-template-columns: repeat(2, 1fr); }
  .principles-grid { grid-template-columns: 1fr; }
  .state-alerts { grid-template-columns: 1fr; }
  .footer { flex-direction: column; text-align: center; }
}

@media (max-width: 640px) {
  .nav { padding: 16px 24px; }
  .nav-meta { display: none; }
  .hero { padding: 40px 24px; }
  section { padding: 48px 24px; }
  .flow-row { flex-wrap: wrap; gap: 12px; }
  .flow-arrow { display: none; }
  .arch-diagram { flex-direction: column; padding: 20px; }
  .arch-connector { display: none; }
  .footer { padding: 20px 24px; }
  .closing-specs { text-align: left; }
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* Selection */
::selection { background: var(--amber-dim); color: var(--amber); }