/* ============================================================
   NutchDemo — Modern clean design system
   ============================================================ */

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

:root {
  --bg: #0a0a0f;
  --surface: #111118;
  --surface-2: #1a1a25;
  --border: rgba(255,255,255,0.08);
  --text: #f0f0f5;
  --text-muted: #8888a8;
  --accent: #7c6bff;
  --accent-2: #a78bff;
  --green: #22c55e;
  --radius: 12px;
  --font: 'Inter', system-ui, sans-serif;
}

html {
  scroll-behavior: smooth;
}

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- NAV ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 600;
  color: var(--text);
  font-size: 15px;
}

.logo-dot {
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent);
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

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

/* ---- HERO ---- */
.hero {
  min-height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  padding: 80px 24px;
  max-width: 1100px;
  margin: 0 auto;
  gap: 60px;
}

.hero-container {
  flex: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  background: rgba(124, 107, 255, 0.15);
  border: 1px solid rgba(124, 107, 255, 0.3);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent-2);
  margin-bottom: 28px;
  letter-spacing: 0.02em;
}

.hero-title {
  font-size: clamp(42px, 6vw, 72px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent-2), #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 480px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
}

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

.btn-primary:hover {
  background: var(--accent-2);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(124, 107, 255, 0.4);
}

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

.btn-secondary:hover {
  background: rgba(255,255,255,0.08);
  transform: translateY(-1px);
}

/* ---- HERO VISUAL ---- */
.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-shrink: 0;
  width: 260px;
}

.agent-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}

.agent-card.idle {
  opacity: 0.5;
}

.agent-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  flex-shrink: 0;
}

.agent-dot.active {
  background: var(--green);
  box-shadow: 0 0 8px rgba(34, 197, 94, 0.6);
}

.agent-card span:nth-child(2) {
  flex: 1;
  font-weight: 500;
  color: var(--text);
}

.agent-status {
  color: var(--text-muted);
  font-size: 11px;
}

/* ---- SECTIONS ---- */
.about, .features {
  padding: 100px 0;
}

.about {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
}

.section-description {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 56px;
}

/* ---- ABOUT GRID ---- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.about-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.2s, transform 0.2s;
}

.about-card:hover {
  border-color: rgba(124, 107, 255, 0.4);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 28px;
  margin-bottom: 14px;
}

.about-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
}

.about-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ---- FEATURES ---- */
.features-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

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

.feature-item:first-child {
  border-top: 1px solid var(--border);
}

.feature-number {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.05em;
  padding-top: 4px;
  min-width: 28px;
}

.feature-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-content p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 600px;
}

/* ---- FOOTER ---- */
.footer {
  padding: 60px 0 40px;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 40px;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-brand > div {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand p {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

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

.footer-bottom {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-bottom a {
  color: var(--accent-2);
  text-decoration: none;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    padding: 60px 24px;
    gap: 40px;
  }

  .hero-visual {
    width: 100%;
  }

  .nav-links {
    display: none;
  }

  .feature-item {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .about-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
  }
}