@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@300;400;500;600;700&family=DM+Mono:wght@400;500&display=swap');

:root {
  --bg: #f4f1ec;
  --surface: #faf8f5;
  --surface-2: #eeeae3;
  --border: #d8d3c8;
  --border-light: #e8e3da;
  --text: #1a1714;
  --text-2: #5a5549;
  --text-3: #8c8579;
  --accent: #1e3a5f;
  --accent-2: #2d5986;
  --green: #2a6b47;
  --red: #8b2020;
  --mono: 'DM Mono', monospace;
  --sans: 'DM Sans', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }

.container {
  width: min(1140px, 92%);
  margin: 0 auto;
}

/* ── HEADER ── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(244, 241, 236, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
}

.logo {
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 36px;
  font-size: 0.9rem;
  color: var(--text-2);
}

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

/* ── HERO ── */
.hero {
  padding: 100px 0 90px;
  border-bottom: 1px solid var(--border);
  background: #1a1f2e;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 80px;
  align-items: center;
}

.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(30, 58, 95, 0.07);
  border: 1px solid rgba(30, 58, 95, 0.18);
  padding: 7px 14px;
  border-radius: 4px;
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(3rem, 5.5vw, 4.5rem);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 24px;
}

.hero p {
  color: var(--text-2);
  font-size: 1.05rem;
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.75;
}

.buttons { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  padding: 12px 24px;
  border-radius: 6px;
  font-weight: 500;
  font-size: 0.9rem;
  transition: all 0.18s ease;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover { background: var(--accent-2); }

.btn-secondary {
  border: 1px solid var(--border);
  color: var(--text-2);
  background: var(--surface);
}

.btn-secondary:hover {
  background: var(--surface-2);
  border-color: var(--border);
  color: var(--text);
}

/* ── STATUS CARD ── */
.hero-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}

.hero-card h3 {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-light);
}

.metric {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 13px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.9rem;
}

.metric:last-child { border-bottom: none; }
.metric span:first-child { color: var(--text-2); }

.status {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--green);
  letter-spacing: 0.02em;
}

/* ── SECTIONS ── */
section { padding: 96px 0; border-bottom: 1px solid var(--border); }
section:last-of-type { border-bottom: none; }

.section-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 14px;
  line-height: 1.15;
}

.section-subtitle {
  color: var(--text-2);
  max-width: 600px;
  margin-bottom: 52px;
  font-size: 1rem;
  line-height: 1.75;
}

/* ── CARDS ── */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  border-color: rgba(30, 58, 95, 0.3);
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}

.card-number {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-3);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

.card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.card p { color: var(--text-2); font-size: 0.9rem; line-height: 1.7; }

/* ── ARCHITECTURE ── */
.architecture {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 44px;
}

.arch-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 32px;
}

.flow {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.flow:last-child { margin-bottom: 0; }

.flow-box {
  padding: 14px 20px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-2);
  white-space: nowrap;
  transition: border-color 0.2s;
}

.flow-box:hover { border-color: var(--accent); color: var(--accent); }

.arrow {
  color: var(--border);
  font-size: 1rem;
  padding: 0 12px;
  user-select: none;
}

/* ── DEMO ── */
.demo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.demo-card, .result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
}

.input-group { margin-bottom: 18px; }

.input-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.85rem;
  color: var(--text-2);
  font-weight: 500;
}

.input-group input {
  width: 100%;
  padding: 11px 14px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.9rem;
  transition: border-color 0.18s;
}

.input-group input:focus {
  outline: none;
  border-color: var(--accent);
}

.input-group input::placeholder { color: var(--text-3); }

.predict-btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: white;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.18s;
  letter-spacing: 0.01em;
  margin-top: 4px;
}

.predict-btn:hover { background: var(--accent-2); }

.result-card h3 {
  font-size: 0.8rem;
  font-family: var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-light);
}

.result-item { margin-bottom: 22px; }

.result-label {
  font-size: 0.78rem;
  color: var(--text-3);
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.result-value {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.anomaly { color: var(--red); }
.normal { color: var(--green); }
.placeholder { color: var(--text-3); font-size: 0.9rem; }

.reason-list {
  padding-left: 16px;
  color: var(--text-2);
  font-size: 0.9rem;
  line-height: 1.8;
}

.model-note {
  background: rgba(30, 58, 95, 0.04);
  border: 1px solid rgba(30, 58, 95, 0.1);
  border-radius: 8px;
  padding: 18px;
  margin-top: 16px;
}

.model-note h4 {
  font-size: 0.78rem;
  font-family: var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.model-note p {
  color: var(--text-2);
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 8px;
}

.model-note p:last-child { margin-bottom: 0; }

/* ── SAMPLE INPUTS ── */
.sample-inputs { margin-top: 28px; border-top: 1px solid var(--border-light); padding-top: 24px; }

.sample-inputs h4 {
  font-size: 0.78rem;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-3);
  margin-bottom: 14px;
}

.sample-box {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 12px;
  background: var(--bg);
}

.sample-box:last-child { margin-bottom: 0; }

.sample-box h5 {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 8px;
}

.anomaly-sample h5 { color: var(--red); }

.sample-box p {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-2);
  line-height: 1.8;
}

/* ── ROADMAP ── */
.timeline { display: grid; gap: 2px; }

.timeline-item {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  padding: 28px 0;
  border-bottom: 1px solid var(--border-light);
}

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

.timeline-number {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-3);
  letter-spacing: 0.04em;
  min-width: 28px;
  padding-top: 3px;
}

.timeline-item h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.timeline-item p { color: var(--text-2); font-size: 0.9rem; line-height: 1.7; }

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 36px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-logo {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-3);
}

.footer-note {
  font-size: 0.82rem;
  color: var(--text-3);
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .hero-grid, .demo-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hero { padding: 60px 0; }
  .architecture { padding: 28px; }
  .flow { gap: 8px; }
  .arrow { padding: 0 4px; }
}

#demo {
  background: #12161f;
}

.hero h1,
.hero p,
.hero .tag {
  color: #e8e4dc;
}

.hero .tag {
  background: rgba(255,255,255,0.07);
  border-color: rgba(255,255,255,0.15);
}

#demo .section-label,
#demo .section-title,
#demo .section-subtitle {
  color: #e8e4dc;
}

#demo .section-label {
  color: #a09b93;
}