/* OrchAgent landing — Scientific Terminal aesthetic */

:root {
  /* Base palette — deep blue-black with whisper-tone grays */
  --bg-0: #07090d;
  --bg-1: #0b0e14;
  --bg-2: #10141c;
  --bg-3: #161b26;
  --line-1: rgba(255, 255, 255, 0.06);
  --line-2: rgba(255, 255, 255, 0.10);
  --line-3: rgba(255, 255, 255, 0.16);

  --fg-0: #f4f1e8;        /* cream white */
  --fg-1: #d8d4c6;
  --fg-2: #8d9099;
  --fg-3: #5a5e68;
  --fg-4: #3a3e48;

  /* Accents — cyan primary, amber signal (tweakable) */
  --accent-cyan: oklch(0.82 0.14 200);
  --accent-cyan-dim: oklch(0.55 0.10 200);
  --accent-cyan-bg: oklch(0.82 0.14 200 / 0.12);
  --accent-amber: oklch(0.80 0.15 75);
  --accent-amber-dim: oklch(0.58 0.11 75);
  --accent-rose: oklch(0.72 0.15 20);

  /* Primary accent — rewritten by tweaks */
  --accent: var(--accent-cyan);
  --accent-dim: var(--accent-cyan-dim);
  --accent-bg: var(--accent-cyan-bg);
  --signal: var(--accent-amber);

  --font-display: "Instrument Serif", "Times New Roman", serif;
  --font-sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;

  --radius: 2px;
  --radius-lg: 4px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-0);
  color: var(--fg-0);
  font-family: var(--font-sans);
  font-feature-settings: "ss01", "cv01";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body {
  background:
    radial-gradient(1200px 800px at 50% -20%, rgba(255, 255, 255, 0.03), transparent 60%),
    radial-gradient(900px 600px at 100% 100%, color-mix(in oklch, var(--accent) 5%, transparent), transparent 60%),
    var(--bg-0);
  min-height: 100vh;
}

/* Subtle grid overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--line-1) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-1) 1px, transparent 1px);
  background-size: 80px 80px;
  background-position: -1px -1px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

/* Film grain */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.035;
  z-index: 1;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='1'/></svg>");
}

/* ================= TYPE ================= */
.display {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 0.95;
}

.mono {
  font-family: var(--font-mono);
  font-feature-settings: "zero", "ss01";
}

.mono-eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--fg-2);
}

.tiny {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--fg-3);
}

/* ================= LAYOUT ================= */
.wrap {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 40px;
  position: relative;
  z-index: 2;
}

.section {
  padding: 120px 0;
  position: relative;
}

.section + .section {
  border-top: 1px solid var(--line-1);
}

/* ================= NAV ================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px) saturate(140%);
  background: color-mix(in srgb, var(--bg-0) 70%, transparent);
  border-bottom: 1px solid var(--line-1);
}

.nav-inner {
  max-width: 1360px;
  margin: 0 auto;
  padding: 14px 40px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--fg-0);
}

.logo-mark {
  width: 18px;
  height: 18px;
  position: relative;
  display: inline-block;
}
.logo-mark::before,
.logo-mark::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid var(--accent);
  border-radius: 50%;
}
.logo-mark::after {
  inset: 4px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.nav-links {
  display: flex;
  gap: 28px;
  margin-left: 24px;
}
.nav-links a {
  color: var(--fg-2);
  text-decoration: none;
  font-size: 12px;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--fg-0); }

.nav-spacer { flex: 1; }

.nav-cta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  border: 1px solid var(--line-2);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--fg-1);
  text-transform: uppercase;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent); opacity: 1; }
  50% { box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent) 0%, transparent); opacity: 0.7; }
}

/* ================= BUTTONS ================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-decoration: none;
  border-radius: var(--radius);
  transition: all 0.18s ease;
  cursor: pointer;
  border: 1px solid transparent;
  background: none;
  color: inherit;
}

.btn-primary {
  background: var(--accent);
  color: #07090d;
  border-color: var(--accent);
  text-transform: uppercase;
  font-weight: 500;
}
.btn-primary:hover {
  box-shadow: 0 0 0 3px var(--accent-bg);
  transform: translateY(-1px);
}

.btn-ghost {
  border-color: var(--line-2);
  color: var(--fg-1);
  text-transform: uppercase;
}
.btn-ghost:hover {
  border-color: var(--line-3);
  color: var(--fg-0);
}

.btn-arrow::after {
  content: "→";
  font-family: var(--font-mono);
}

/* ================= HERO ================= */
.hero {
  min-height: calc(100vh - 52px);
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 60px 0 80px;
  position: relative;
}

.hero-copy { position: relative; z-index: 3; }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 36px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-2);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.hero-eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(56px, 7.5vw, 108px);
  line-height: 0.92;
  margin: 0;
  letter-spacing: -0.025em;
  color: var(--fg-0);
}
.hero h1 em {
  font-style: italic;
  color: var(--accent);
  font-family: var(--font-display);
}
.hero h1 .signal {
  font-style: italic;
  color: var(--signal);
  font-family: var(--font-display);
}

.hero-sub {
  margin-top: 28px;
  max-width: 520px;
  color: var(--fg-1);
  font-size: 17px;
  line-height: 1.55;
  font-weight: 400;
}

.hero-meta {
  margin-top: 40px;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.hero-ctas {
  margin-top: 36px;
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 14px;
  border-left: 1px solid var(--line-2);
}
.hero-stat .v {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--fg-0);
  letter-spacing: -0.01em;
}
.hero-stat .l {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Right side graph */
.hero-graph {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 640px;
  justify-self: end;
  width: 100%;
}

/* Corner crosshair marks */
.corner-marks {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.corner-marks i {
  position: absolute;
  width: 16px;
  height: 16px;
  border-color: var(--fg-3);
  border-style: solid;
  border-width: 0;
}
.corner-marks i:nth-child(1) { top: 0; left: 0; border-top-width: 1px; border-left-width: 1px; }
.corner-marks i:nth-child(2) { top: 0; right: 0; border-top-width: 1px; border-right-width: 1px; }
.corner-marks i:nth-child(3) { bottom: 0; left: 0; border-bottom-width: 1px; border-left-width: 1px; }
.corner-marks i:nth-child(4) { bottom: 0; right: 0; border-bottom-width: 1px; border-right-width: 1px; }

/* ================= GRAPH ================= */
.graph-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
  position: relative;
  z-index: 2;
}

.graph-ring {
  fill: none;
  stroke: var(--line-2);
  stroke-dasharray: 2 4;
}
.graph-ring-2 {
  stroke: var(--line-1);
}

.graph-edge {
  fill: none;
  stroke: color-mix(in srgb, var(--accent) 40%, transparent);
  stroke-width: 1;
  stroke-linecap: round;
}

.graph-edge.active {
  stroke: var(--accent);
  filter: drop-shadow(0 0 4px var(--accent));
}

.graph-edge.signal {
  stroke: var(--signal);
  filter: drop-shadow(0 0 4px var(--signal));
}

.graph-node {
  transition: transform 0.3s ease;
}

.graph-node circle.bg {
  fill: var(--bg-1);
  stroke: var(--line-3);
  stroke-width: 1;
}

.graph-node.active circle.bg {
  stroke: var(--accent);
  fill: color-mix(in srgb, var(--accent) 12%, var(--bg-1));
  filter: drop-shadow(0 0 10px color-mix(in srgb, var(--accent) 50%, transparent));
}

.graph-node.signal circle.bg {
  stroke: var(--signal);
  fill: color-mix(in srgb, var(--signal) 12%, var(--bg-1));
  filter: drop-shadow(0 0 10px color-mix(in srgb, var(--signal) 50%, transparent));
}

.graph-node text.label {
  font-family: var(--font-mono);
  fill: var(--fg-1);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.graph-node text.role {
  font-family: var(--font-mono);
  fill: var(--fg-3);
  font-size: 7px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.graph-node.active text.label { fill: var(--fg-0); }
.graph-node.signal text.label { fill: var(--fg-0); }

/* Particle along path */
.particle {
  fill: var(--accent);
  filter: drop-shadow(0 0 6px var(--accent));
}
.particle.signal {
  fill: var(--signal);
  filter: drop-shadow(0 0 6px var(--signal));
}

/* Pulse rings on active nodes */
@keyframes nodepulse {
  0% { r: 18; opacity: 0.9; }
  100% { r: 42; opacity: 0; }
}

/* Orbit rotation */
@keyframes orbit-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Rotating outer ring ticks group */
.orbit-ticks {
  transform-origin: center;
  transform-box: fill-box;
  animation: orbit-rotate 120s linear infinite;
}
.orbit-ticks-inner {
  transform-origin: center;
  transform-box: fill-box;
  animation: orbit-rotate 80s linear infinite reverse;
}

/* ================= EVENT LOG (floating over hero) ================= */
.event-log {
  position: absolute;
  right: -8px;
  bottom: 20px;
  width: 320px;
  background: color-mix(in srgb, var(--bg-1) 85%, transparent);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  padding: 14px 16px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  z-index: 4;
  box-shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.6);
}

.event-log-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 10px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--line-1);
}
.event-log-title {
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-2);
}
.event-log-stream {
  font-size: 9px;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 6px;
}
.event-log-stream::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.4s infinite;
}

.event-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 180px;
  overflow: hidden;
  mask-image: linear-gradient(to top, transparent, black 20%);
}

.event-row {
  display: grid;
  grid-template-columns: 58px 52px 1fr;
  gap: 10px;
  align-items: baseline;
  color: var(--fg-1);
  font-size: 10.5px;
  animation: slideIn 0.3s ease;
}
.event-row .ts { color: var(--fg-3); }
.event-row .tag {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.event-row .tag.route { color: var(--accent); }
.event-row .tag.reason { color: var(--signal); }
.event-row .tag.tool { color: var(--fg-0); }
.event-row .tag.text { color: var(--fg-2); }
.event-row .tag.ckpt { color: color-mix(in srgb, var(--accent) 70%, white); }
.event-row .msg { color: var(--fg-1); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

@keyframes slideIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ================= DEMO CONSOLE ================= */
.demo {
  background:
    linear-gradient(180deg, transparent, rgba(0,0,0,0.2)),
    var(--bg-1);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: grid;
  grid-template-columns: 320px 1fr 320px;
  min-height: 560px;
}

.demo-col {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line-1);
  min-width: 0;
  min-height: 0;
}
.demo-col:last-child { border-right: none; }

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

.demo-col-body {
  padding: 14px 18px;
  flex: 1 1 auto;
  overflow: hidden;
  min-height: 360px;
}

/* Chat column */
.chat-msgs {
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow-y: auto;
  height: 100%;
  padding-right: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--line-3) transparent;
}
.chat-row { display: flex; flex-direction: column; align-items: flex-start; width: 100%; }
.chat-row.user { align-items: flex-end; }
.chat-msgs::-webkit-scrollbar { width: 4px; }
.chat-msgs::-webkit-scrollbar-thumb { background: var(--line-3); }

.msg-bubble {
  padding: 10px 12px;
  border-radius: var(--radius-lg);
  font-size: 13px;
  line-height: 1.5;
  max-width: 92%;
  animation: slideIn 0.3s ease;
}
.msg-bubble.user {
  align-self: flex-end;
  background: var(--accent-bg);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  color: var(--fg-0);
}
.msg-bubble.agent {
  align-self: flex-start;
  background: var(--bg-2);
  border: 1px solid var(--line-1);
  color: var(--fg-1);
}
.msg-meta {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: 4px;
  display: flex;
  gap: 8px;
  align-items: center;
}
.msg-meta .agent-tag {
  color: var(--accent);
}
.msg-meta .agent-tag.signal { color: var(--signal); }

.chat-input {
  border-top: 1px solid var(--line-1);
  padding: 14px 16px;
  display: flex;
  gap: 10px;
  align-items: center;
  background: var(--bg-1);
}
.chat-input input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--fg-0);
  font-family: var(--font-sans);
  font-size: 13px;
}
.chat-input input::placeholder { color: var(--fg-3); }

.suggestion-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 10px 16px 0;
}
.suggestion {
  background: var(--bg-2);
  border: 1px solid var(--line-1);
  padding: 5px 9px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-1);
  cursor: pointer;
  border-radius: var(--radius);
  transition: all 0.15s;
}
.suggestion:hover {
  border-color: var(--accent);
  color: var(--fg-0);
}

/* Tool/reasoning columns */
.stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
  height: 100%;
  scrollbar-width: thin;
  scrollbar-color: var(--line-3) transparent;
}
.stack::-webkit-scrollbar { width: 4px; }
.stack::-webkit-scrollbar-thumb { background: var(--line-3); }

.tool-card {
  border: 1px solid var(--line-1);
  background: var(--bg-2);
  padding: 10px 12px;
  border-radius: var(--radius);
  animation: slideIn 0.3s ease;
}
.tool-card.active {
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  background: color-mix(in srgb, var(--accent) 5%, var(--bg-2));
}
.tool-card.done {
  border-color: var(--line-2);
}
.tool-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}
.tool-card-name {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-0);
}
.tool-card-status {
  font-family: var(--font-mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-3);
}
.tool-card.active .tool-card-status { color: var(--accent); }
.tool-card.done .tool-card-status { color: var(--fg-2); }
.tool-card-detail {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--fg-2);
  line-height: 1.5;
  word-break: break-word;
}

.reason-block {
  border-left: 1px solid var(--line-2);
  padding: 2px 0 2px 12px;
  font-size: 12px;
  color: var(--fg-1);
  line-height: 1.55;
  animation: slideIn 0.3s ease;
}
.reason-block.active {
  border-left-color: var(--signal);
  color: var(--fg-0);
}
.reason-head {
  font-family: var(--font-mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-3);
  margin-bottom: 4px;
}
.reason-block.active .reason-head { color: var(--signal); }

/* HITL prompt */
.hitl-card {
  margin: 10px 16px;
  border: 1px solid color-mix(in srgb, var(--signal) 50%, transparent);
  background: color-mix(in srgb, var(--signal) 8%, var(--bg-2));
  padding: 12px 14px;
  border-radius: var(--radius-lg);
  animation: slideIn 0.3s ease;
}
.hitl-head {
  display: flex;
  gap: 8px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--signal);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}
.hitl-head::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--signal);
  animation: pulse 1.4s infinite;
}
.hitl-body {
  font-size: 12px;
  color: var(--fg-1);
  margin-bottom: 10px;
  line-height: 1.5;
}
.hitl-actions {
  display: flex;
  gap: 6px;
}
.hitl-btn {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 5px 10px;
  background: var(--bg-1);
  border: 1px solid var(--line-2);
  color: var(--fg-1);
  cursor: pointer;
  border-radius: var(--radius);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: all 0.15s;
}
.hitl-btn:hover { border-color: var(--line-3); color: var(--fg-0); }
.hitl-btn.primary { background: var(--signal); color: #07090d; border-color: var(--signal); }

/* ================= FEATURE GRID ================= */
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 64px;
  flex-wrap: wrap;
  gap: 24px;
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(42px, 5vw, 72px);
  line-height: 1.0;
  letter-spacing: -0.02em;
  margin: 0;
  max-width: 720px;
}
.section-head h2 em {
  font-style: italic;
  color: var(--accent);
}
.section-head .desc {
  max-width: 360px;
  color: var(--fg-2);
  font-size: 14px;
  line-height: 1.55;
}

.feat-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1px;
  background: var(--line-1);
  border: 1px solid var(--line-1);
}
.feat {
  background: var(--bg-0);
  padding: 32px 28px;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: background 0.2s;
}
.feat:hover { background: var(--bg-1); }
.feat.w-6 { grid-column: span 6; }
.feat.w-4 { grid-column: span 4; }
.feat.w-8 { grid-column: span 8; }
.feat.w-5 { grid-column: span 5; }
.feat.w-7 { grid-column: span 7; }
.feat.w-12 { grid-column: span 12; }

.feat-index {
  position: absolute;
  top: 16px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-3);
  letter-spacing: 0.1em;
}
.feat-kicker {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 18px;
}
.feat h3 {
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1.05;
  margin: 0 0 14px;
  letter-spacing: -0.015em;
  color: var(--fg-0);
}
.feat p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--fg-2);
  margin: 0;
  max-width: 460px;
}
.feat-visual {
  margin-top: auto;
  padding-top: 22px;
}

/* Inline mini diagrams */
.mini-box {
  border: 1px solid var(--line-2);
  padding: 10px 12px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--fg-1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-1);
}

.bar-chart {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 48px;
}
.bar-chart i {
  flex: 1;
  background: var(--accent);
  opacity: 0.7;
}
.bar-chart i:nth-child(odd) { opacity: 0.9; }

/* ================= ARCHITECTURE DIAGRAM ================= */
.arch {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  position: relative;
  padding: 40px 0;
}
.arch-row {
  display: flex;
  justify-content: center;
  gap: 28px;
  position: relative;
  flex-wrap: wrap;
}
.arch-row + .arch-row { margin-top: 80px; }

.arch-node {
  border: 1px solid var(--line-2);
  background: var(--bg-1);
  padding: 16px 20px;
  border-radius: var(--radius);
  min-width: 200px;
  position: relative;
  transition: all 0.2s;
}
.arch-node:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 5%, var(--bg-1));
}
.arch-node.supervisor {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-1));
}
.arch-node.validator {
  border-color: color-mix(in srgb, var(--signal) 50%, var(--line-2));
  background: color-mix(in srgb, var(--signal) 5%, var(--bg-1));
}
.arch-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  color: var(--fg-3);
  text-transform: uppercase;
  margin-bottom: 4px;
}
.arch-title {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--fg-0);
  font-weight: 500;
  margin-bottom: 6px;
}
.arch-desc {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-2);
  line-height: 1.5;
}

.arch-connector {
  position: absolute;
  left: 50%;
  top: -60px;
  width: 1px;
  height: 60px;
  background: var(--line-2);
  transform: translateX(-50%);
}
.arch-connector.active {
  background: linear-gradient(to bottom, transparent, var(--accent));
  box-shadow: 0 0 8px var(--accent);
}

/* ================= CODE BLOCK ================= */
.code-block {
  background: var(--bg-1);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.65;
}
.code-head {
  padding: 10px 16px;
  border-bottom: 1px solid var(--line-1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-2);
}
.code-head .dots {
  display: flex;
  gap: 6px;
}
.code-head .dots i {
  width: 8px; height: 8px; border-radius: 50%; background: var(--fg-4);
}
.code-head .fname {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-2);
}
.code-body {
  padding: 18px 20px;
  overflow-x: auto;
  color: var(--fg-1);
}
.code-body .k { color: var(--accent); }
.code-body .s { color: var(--signal); }
.code-body .c { color: var(--fg-3); font-style: italic; }
.code-body .p { color: var(--fg-0); }
.code-body .f { color: color-mix(in srgb, var(--accent) 70%, white); }
.code-body pre { margin: 0; font-family: inherit; }

/* ================= CTA ================= */
.cta-block {
  border: 1px solid var(--line-2);
  background:
    radial-gradient(600px 400px at 20% 20%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 60%),
    var(--bg-1);
  border-radius: var(--radius-lg);
  padding: 80px 60px;
  text-align: center;
}
.cta-block h2 {
  font-family: var(--font-display);
  font-size: clamp(46px, 6vw, 88px);
  margin: 0;
  letter-spacing: -0.02em;
  line-height: 1.0;
}
.cta-block h2 em {
  font-style: italic;
  color: var(--accent);
}
.cta-block p {
  max-width: 560px;
  margin: 24px auto 36px;
  color: var(--fg-2);
  font-size: 16px;
  line-height: 1.55;
}
.cta-block .cta-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* ================= FOOTER ================= */
.footer {
  border-top: 1px solid var(--line-1);
  padding: 40px 0 32px;
  color: var(--fg-3);
  font-family: var(--font-mono);
  font-size: 11px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

/* ================= TWEAKS PANEL ================= */
.tweaks {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 280px;
  background: var(--bg-1);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  z-index: 100;
  font-family: var(--font-mono);
  font-size: 11px;
  box-shadow: 0 20px 60px -20px rgba(0,0,0,0.8);
  display: none;
}
.tweaks.open { display: block; }

.tweaks h4 {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-2);
  margin: 0 0 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.tweaks h4 span {
  color: var(--accent);
}
.tweak-group { margin-bottom: 14px; }
.tweak-group:last-child { margin-bottom: 0; }
.tweak-label {
  font-size: 10px;
  color: var(--fg-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.tweak-options {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.tweak-opt {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 5px 8px;
  border: 1px solid var(--line-2);
  background: var(--bg-2);
  color: var(--fg-1);
  cursor: pointer;
  border-radius: var(--radius);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex: 1;
}
.tweak-opt.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-bg);
}

.swatch-row { display: flex; gap: 6px; }
.swatch {
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 2px solid var(--line-2);
  cursor: pointer;
  transition: transform 0.1s;
}
.swatch:hover { transform: scale(1.1); }
.swatch.active { border-color: var(--fg-0); }

/* ================= RESPONSIVE ================= */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; }
  .hero-graph { justify-self: center; max-width: 520px; }
  .demo { grid-template-columns: 1fr; }
  .demo-col { border-right: none; border-bottom: 1px solid var(--line-1); }
  .feat.w-6, .feat.w-4, .feat.w-8, .feat.w-5, .feat.w-7 { grid-column: span 12; }
  .code-section-grid { grid-template-columns: 1fr !important; }
  .wrap { padding: 0 20px; }
  .nav-inner { padding: 14px 20px; }
  .nav-links { display: none; }
  .event-log { position: static; width: 100%; margin-top: 20px; }
}