:root {
  --bg: #0a0f0a;
  --bg2: #0f160f;
  --bg3: #141e14;
  --border: #1e2d1e;
  --green: #7fff00;
  --green-dim: #4a9900;
  --green-faint: #1a2e0a;
  --text: #c8d8c0;
  --text-dim: #5a7a55;
  --text-faint: #3a4e36;
  --white: #f0f4ee;
  --mono: 'JetBrains Mono', 'Space Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ─── NAV ─── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 40px;
  background: rgba(10,15,10,0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.nav-brand {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--white);
}

.nav-brand .caret { color: var(--green); margin-right: 6px; }
.nav-brand .accent { color: var(--green); }

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}

.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 11px;
  letter-spacing: 0.12em;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--green); }

.nav-gh {
  border: 1px solid var(--border);
  padding: 5px 12px;
  color: var(--text) !important;
  border-radius: 2px;
}

.nav-gh:hover { border-color: var(--green) !important; color: var(--green) !important; }

/* ─── HERO ─── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 60px 80px;
  overflow: hidden;
  background: radial-gradient(ellipse at 20% 50%, #0d200d 0%, var(--bg) 60%),
              radial-gradient(ellipse at 80% 20%, #0a1a0a 0%, transparent 50%);
}

/* dot grid */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, #1e3a1e 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.35;
  pointer-events: none;
}

.scanline {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.03) 2px,
    rgba(0,0,0,0.03) 4px
  );
  pointer-events: none;
}

.hero-tag {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  margin-bottom: 32px;
}

.hero-title {
  font-family: var(--mono);
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--white);
  margin-bottom: 28px;
  max-width: 820px;
}

.hero-italic em {
  color: var(--green);
  font-style: italic;
}

.hero-sub {
  max-width: 660px;
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.8;
  margin-bottom: 10px;
}

.hero-sub strong { color: var(--green); font-weight: 500; }

.hero-byline {
  font-size: 11px;
  color: var(--text-faint);
  margin-bottom: 48px;
}

.hero-byline .accent { color: var(--green-dim); }

.hero-stats {
  display: flex;
  gap: 0;
  margin-bottom: 40px;
  border: 1px solid var(--border);
  width: fit-content;
}

.stat {
  padding: 16px 32px;
  border-right: 1px solid var(--border);
  text-align: center;
}
.stat:last-child { border-right: none; }

.stat-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  white-space: nowrap;
}

.stat-label {
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  margin-top: 4px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  align-items: center;
}

.btn-primary {
  background: var(--green);
  color: #0a0f0a;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 12px 24px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  display: inline-block;
}

.btn-primary:hover { background: #9fff33; transform: translateY(-1px); }

.btn-secondary {
  background: transparent;
  color: var(--text);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 12px 24px;
  text-decoration: none;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
  display: inline-block;
}

.btn-secondary:hover { border-color: var(--green); color: var(--green); }

/* ─── SECTIONS ─── */
.section {
  padding: 100px 60px;
  border-top: 1px solid var(--border);
}

.section-tag {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  margin-bottom: 20px;
}

.section-title {
  font-size: clamp(28px, 3.5vw, 48px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 16px;
  max-width: 700px;
}

.section-sub {
  color: var(--text-dim);
  max-width: 600px;
  margin-bottom: 32px;
  line-height: 1.8;
}

.hints {
  list-style: none;
  color: var(--green-dim);
  font-size: 12px;
  margin-bottom: 32px;
}
.hints li { margin-bottom: 4px; }

/* ─── DEMO CARD ─── */
.demo-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  max-width: 720px;
  overflow: hidden;
}

.tab-row {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.tab {
  flex: 1;
  background: transparent;
  border: none;
  padding: 12px 20px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  cursor: pointer;
  border-right: 1px solid var(--border);
  transition: background 0.2s, color 0.2s;
}

.tab:last-child { border-right: none; }
.tab.active { background: var(--green-faint); color: var(--green); }
.tab:hover:not(.active) { color: var(--text); }

.tab-content { display: none; padding: 24px; }
.tab-content.active { display: block; }

.field-label {
  display: block;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  margin-bottom: 8px;
  margin-top: 16px;
}
.field-label:first-child { margin-top: 0; }

.field-input {
  display: block;
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--green);
  font-family: var(--mono);
  font-size: 13px;
  padding: 10px 14px;
  outline: none;
  transition: border-color 0.2s;
}

.field-input:focus { border-color: var(--green-dim); }

.pgn-area {
  min-height: 140px;
  resize: vertical;
  color: var(--text);
  font-size: 11px;
  line-height: 1.6;
}

.slider {
  width: 100%;
  margin-top: 8px;
  accent-color: var(--green);
  cursor: pointer;
}

.demo-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg3);
}

.endpoint {
  font-size: 11px;
  color: var(--text-faint);
}

.btn-generate {
  background: var(--green);
  color: #0a0f0a;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 9px 20px;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-generate:hover { background: #9fff33; }
.btn-generate:disabled { background: var(--green-dim); opacity: 0.5; cursor: not-allowed; }

/* ─── LOADING ─── */
.loading-block {
  padding: 32px 0;
  color: var(--green-dim);
  font-size: 13px;
}
.blink { animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ─── OUTPUT ─── */
.output-area { margin-top: 40px; max-width: 960px; animation: fadeUp 0.4s ease; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.output-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.output-tag {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
}

.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 2s infinite;
}

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

.status-text {
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--green-dim);
}

.output-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 2px;
  margin-bottom: 2px;
}

.out-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 24px;
}

.archetype-card { grid-column: 1; }
.trait-card { grid-column: 2; grid-row: 1 / 3; }
.spec-card { grid-column: 1; }

.out-label {
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.archetype-name {
  font-size: 26px;
  font-weight: 700;
  color: var(--green);
  margin-bottom: 8px;
  line-height: 1.2;
}

.archetype-desc {
  font-size: 12px;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 12px;
}

.archetype-conf {
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

/* Traits */
.traits { display: flex; flex-direction: column; gap: 10px; }

.trait-row { display: flex; align-items: center; gap: 10px; }

.trait-name {
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  width: 140px;
  flex-shrink: 0;
  text-transform: uppercase;
}

.trait-bar-bg {
  flex: 1;
  height: 4px;
  background: var(--bg3);
  border: 1px solid var(--border);
  overflow: hidden;
}

.trait-bar-fill {
  height: 100%;
  background: var(--green);
  transition: width 0.8s cubic-bezier(0.4,0,0.2,1);
}

.trait-val {
  font-size: 10px;
  color: var(--text-dim);
  width: 32px;
  text-align: right;
}

/* Spec Grid */
.spec-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.spec-item {}
.spec-key {
  font-size: 9px;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  margin-bottom: 2px;
}
.spec-val {
  font-size: 14px;
  font-weight: 700;
  color: var(--white);
}

/* JSON Block */
.json-block {
  background: var(--bg3);
  border: 1px solid var(--border);
  padding: 24px;
}

.json-label {
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  margin-bottom: 12px;
}

#json-out {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text);
  white-space: pre-wrap;
  line-height: 1.6;
}

/* ─── PIPELINE FLOW ─── */
.pipeline-flow {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-bottom: 48px;
  max-width: 720px;
  font-size: 12px;
}

.flow-node {
  border: 1px solid var(--border);
  padding: 10px 24px;
  color: var(--text);
  text-align: center;
  line-height: 1.5;
}

.top-node { color: var(--text-dim); font-size: 11px; }
.accent-node {
  border-color: var(--green-dim);
  color: var(--green);
  font-size: 11px;
  line-height: 1.6;
}

.flow-arrow { color: var(--green-dim); font-size: 14px; }

.flow-split {
  display: flex;
  gap: 60px;
  justify-content: center;
  width: 100%;
}

.split-branch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  flex: 1;
}

/* ─── METHOD GRID ─── */
.method-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.method-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 28px;
  position: relative;
}

.method-card h3 {
  font-size: 16px;
  color: var(--white);
  margin-bottom: 12px;
  font-weight: 500;
}

.method-card p {
  font-size: 11px;
  color: var(--text-dim);
  line-height: 1.8;
}

.method-num {
  font-size: 10px;
  color: var(--green);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.method-num::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.accent-method {
  border-color: var(--green-dim);
}

.accent-method h3 { color: var(--green); }

/* ─── ABOUT ─── */
.about-section { background: var(--bg2); }

.about-text {
  max-width: 640px;
  margin-bottom: 40px;
}

.about-text p {
  margin-bottom: 18px;
  line-height: 1.85;
  color: var(--text);
}

.about-text strong { color: var(--white); }
.about-text em { color: var(--green); font-style: italic; }
.about-text .faded { color: var(--text-dim); font-size: 11px; }

.inline-link { color: var(--green-dim); text-decoration: underline; text-decoration-color: var(--border); }
.inline-link:hover { color: var(--green); }

.about-links { display: flex; gap: 12px; flex-wrap: wrap; }

.about-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  padding: 10px 18px;
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s;
}

.about-btn:hover { border-color: var(--green); color: var(--green); }

.accent-btn { border-color: var(--green-dim); color: var(--green-dim); }
.accent-btn:hover { border-color: var(--green); color: var(--green); }

/* ─── FOOTER ─── */
.footer {
  border-top: 1px solid var(--border);
  padding: 24px 60px;
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-faint);
  letter-spacing: 0.08em;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  .nav { padding: 12px 20px; }
  .hero { padding: 100px 24px 60px; }
  .section { padding: 64px 24px; }
  .hero-stats { flex-wrap: wrap; }
  .output-grid { grid-template-columns: 1fr; }
  .archetype-card, .trait-card, .spec-card { grid-column: 1; grid-row: auto; }
  .method-grid { grid-template-columns: 1fr; }
  .flow-split { flex-direction: column; align-items: center; gap: 8px; }
  .footer { flex-direction: column; gap: 8px; padding: 20px 24px; }
  .nav-links { gap: 14px; }
}