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

:root {
  --bg:        #0f1117;
  --bg2:       #161b22;
  --bg3:       #1c2230;
  --border:    #2a3245;
  --amber:     #f0a500;
  --amber-dim: #c48400;
  --steel:     #8a9ab8;
  --text:      #dde3ef;
  --text-dim:  #7a8aaa;
  --green:     #22c55e;
  --red:       #ef4444;
  --radius:    8px;
  --font:      'Inter', 'Segoe UI', system-ui, sans-serif;
  --mono:      'JetBrains Mono', 'Fira Code', monospace;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
}

a { color: var(--amber); text-decoration: none; }
a:hover { color: var(--amber-dim); }

/* ─── HEADER ───────────────────────────────────────────── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15,17,23,0.95);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--amber);
}
nav a {
  margin-left: 28px;
  font-size: 0.88rem;
  color: var(--steel);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: color 0.2s;
}
nav a:hover { color: var(--amber); }

/* ─── HERO ─────────────────────────────────────────────── */
.hero {
  background: linear-gradient(160deg, #0f1117 0%, #1a2035 60%, #0f1117 100%);
  border-bottom: 1px solid var(--border);
  padding: 100px 24px 90px;
  text-align: center;
}
.hero-inner { max-width: 740px; margin: 0 auto; }
.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 18px;
}
.hero h1 span { color: var(--amber); }
.subtitle {
  font-size: 1.25rem;
  color: var(--amber);
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 0.01em;
}
.tagline {
  font-size: 1rem;
  color: var(--steel);
  max-width: 560px;
  margin: 0 auto 36px;
}
.btn-primary {
  display: inline-block;
  background: var(--amber);
  color: #0f1117;
  font-weight: 700;
  padding: 13px 36px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: background 0.2s;
}
.btn-primary:hover { background: var(--amber-dim); color: #0f1117; }

/* ─── SECTIONS ─────────────────────────────────────────── */
.section { padding: 80px 24px; }
.section-dark { background: var(--bg2); }
.container { max-width: 1100px; margin: 0 auto; }

h2 {
  font-size: 1.85rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}
.lead {
  color: var(--steel);
  font-size: 1.05rem;
  max-width: 720px;
  margin-bottom: 48px;
  line-height: 1.7;
}

/* ─── OVERVIEW CARDS ───────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.2s;
}
.card:hover { border-color: var(--amber); }
.card-icon { font-size: 1.8rem; margin-bottom: 14px; }
.card h3 { font-size: 1rem; font-weight: 700; color: var(--amber); margin-bottom: 10px; }
.card p { font-size: 0.9rem; color: var(--steel); line-height: 1.6; }

/* ─── METRICS ──────────────────────────────────────────── */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.metric-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.metric-card.highlight {
  border-color: var(--amber);
  background: rgba(240,165,0,0.06);
}
.metric-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  font-weight: 600;
}
.metric-value {
  font-family: var(--mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--amber);
  min-height: 2rem;
}
.metric-desc { font-size: 0.85rem; color: var(--steel); line-height: 1.5; }
.metric-note { color: var(--amber); font-size: 0.9rem; font-weight: 500; }

/* ─── SIMULATOR ────────────────────────────────────────── */
.sim-layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 32px;
  align-items: start;
}
@media (max-width: 860px) {
  .sim-layout { grid-template-columns: 1fr; }
}
.sim-controls { display: flex; flex-direction: column; gap: 20px; }
.control-group { display: flex; flex-direction: column; gap: 6px; }
.control-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  justify-content: space-between;
}
.val-display {
  font-family: var(--mono);
  color: var(--amber);
  font-size: 0.88rem;
}
input[type=range] {
  width: 100%;
  accent-color: var(--amber);
  cursor: pointer;
  height: 4px;
}
.results-box {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}
.result-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.88rem;
  color: var(--steel);
}
.result-row.highlight-row {
  padding-top: 10px;
  border-top: 1px solid var(--border);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
}
.result-val {
  font-family: var(--mono);
  color: var(--amber);
  font-size: 0.9rem;
}
.result-row.highlight-row .result-val { font-size: 1.1rem; }

.sim-chart {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.scenario-btns {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.scene-btn {
  flex: 1;
  min-width: 120px;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--steel);
  padding: 12px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.4;
  transition: all 0.2s;
  text-align: center;
}
.scene-btn small { font-weight: 400; color: var(--text-dim); }
.scene-btn:hover, .scene-btn.active {
  border-color: var(--amber);
  color: var(--amber);
  background: rgba(240,165,0,0.06);
}

/* ─── GOOD TECH INDEX ──────────────────────────────────── */
.index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  margin-bottom: 36px;
}
.index-item {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
  transition: border-color 0.2s;
}
.index-item:hover { border-color: var(--amber); }
.index-score {
  font-family: var(--mono);
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--amber);
  line-height: 1;
}
.index-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}
.index-slider { width: 100%; accent-color: var(--amber); }
.index-item p { font-size: 0.8rem; color: var(--steel); line-height: 1.5; }
.index-total {
  background: rgba(240,165,0,0.08);
  border: 1px solid var(--amber);
  border-radius: var(--radius);
  padding: 20px 28px;
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 1rem;
  color: var(--steel);
}
.index-total-val {
  font-family: var(--mono);
  font-size: 2rem;
  font-weight: 800;
  color: var(--amber);
}
.index-label-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ─── FOOTER ───────────────────────────────────────────── */
footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  text-align: center;
}
footer .container { display: flex; flex-direction: column; gap: 8px; }
footer p { color: var(--text-dim); font-size: 0.88rem; }
.footer-small { font-size: 0.8rem; }