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

:root {
  --ink: #121826;
  --ink-soft: #545b6b;
  --bg: #ffffff;
  --bg-alt: #f6f7fa;
  --accent: #3457d5;
  --accent-dark: #2842ab;
  --navy: #0f1b2d;
  --navy-soft: #1c2c45;
  --hero-dark: #0a0d12;
  --border: #e3e5ec;
  --radius: 10px;
  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Inter", sans-serif;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
}

img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

h1, h2, h3 {
  font-family: var(--font-display);
  letter-spacing: -0.01em;
}

.btn {
  display: inline-block;
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }

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

.btn-outline { background: transparent; border-color: var(--border); color: var(--ink); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 4rem;
  background: #fff;
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  line-height: 1.15;
  letter-spacing: 0.02em;
}
.logo-icon { width: 34px; height: 34px; border-radius: 8px; object-fit: cover; }

.nav-links { display: flex; gap: 2.4rem; }
.nav-links a { font-size: 0.95rem; font-weight: 500; color: var(--ink); }
.nav-links a:hover { color: var(--accent); }

.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: url("./banner.jpg") center / cover no-repeat;
  background-color: var(--hero-dark);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6,8,12,0.55) 0%, rgba(6,8,12,0.75) 60%, rgba(6,8,12,0.9) 100%);
}

.hero-content { position: relative; z-index: 1; max-width: 780px; padding: 0 1.5rem; color: #fff; }
.hero-content h1 { font-size: 3.4rem; font-weight: 700; margin-bottom: 1.3rem; }
.hero-content h1 em { font-style: italic; font-weight: 700; }
.hero-content p { font-size: 1.05rem; color: #d6d9e2; max-width: 620px; margin: 0 auto 2.2rem; }

.section-heading { text-align: center; font-size: 2.2rem; font-weight: 700; margin-bottom: 0.6rem; }
.section-heading.light { color: #fff; }

.section-subtitle { text-align: center; color: var(--ink-soft); margin-bottom: 3rem; }
.section-subtitle.light { color: #97a0b5; }

.speakers { padding: 6rem 4rem; max-width: 1080px; margin: 0 auto; }
.speakers .section-heading { margin-bottom: 3rem; }

.speaker-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.8rem; }

.speaker-card { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: #fff; }
.speaker-photo { width: 100%; height: 260px; object-fit: cover; }
.speaker-info { padding: 1.4rem 1.5rem 1.7rem; }

.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
}

.speaker-info h3 { font-size: 1.15rem; margin-bottom: 0.25rem; }
.speaker-info p { color: var(--ink-soft); font-size: 0.92rem; }

.pricing { padding: 6rem 4rem; background: var(--bg-alt); }

.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.6rem; max-width: 1080px; margin: 0 auto; }

.price-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.8rem;
  display: flex;
  flex-direction: column;
}

.price-card.featured {
  background: var(--navy);
  color: #fff;
  border-color: var(--navy);
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(15, 27, 45, 0.25);
}

.plan-label { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-soft); }
.featured .plan-label { color: #9fb0d8; }

.price { font-family: var(--font-display); font-size: 2.1rem; font-weight: 700; margin: 0.6rem 0 1.4rem; }
.price span { font-family: var(--font-body); font-size: 0.85rem; font-weight: 400; color: var(--ink-soft); display: block; margin-top: 0.2rem; }
.featured .price span { color: #9fb0d8; }

.features { border-top: 1px solid var(--border); padding-top: 1.2rem; margin-bottom: 1.8rem; flex-grow: 1; }
.featured .features { border-top-color: rgba(255,255,255,0.15); }

.features li { font-size: 0.9rem; padding-left: 1.1rem; position: relative; margin-bottom: 0.7rem; color: var(--ink-soft); }
.featured .features li { color: #cdd6ea; }
.features li::before { content: "•"; position: absolute; left: 0; color: var(--accent); }
.featured .features li::before { color: #6c8dff; }

.price-card .btn { text-align: center; }
.featured .btn-primary { background: var(--accent); }

/* ===== AI Section: Pipeline ===== */
.pipeline { padding: 6rem 4rem; background: var(--hero-dark); }

.pipeline-track { max-width: 640px; margin: 0 auto; position: relative; padding-left: 2.4rem; }

.pipeline-track::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: #262b34;
}

.pipeline-step { position: relative; padding-bottom: 2.6rem; }
.pipeline-step:last-child { padding-bottom: 0; }

.step-icon {
  position: absolute;
  left: -2.4rem;
  top: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #1b2a1f;
  color: #4ade80;
  border: 2px solid #4ade80;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
}

.pipeline-step.running .step-icon {
  background: #2a2410;
  color: #febc2e;
  border-color: #febc2e;
  animation: pulse 1.6s ease-in-out infinite;
}

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

.step-label { font-family: monospace; font-size: 0.75rem; color: #7c8494; text-transform: uppercase; letter-spacing: 0.05em; }
.step-body h3 { color: #fff; font-size: 1.15rem; margin: 0.3rem 0 0.4rem; }
.step-body p { color: #97a0b5; font-size: 0.92rem; line-height: 1.6; }

.site-footer { padding: 3rem 4rem 2.2rem; background: #fff; }

.footer-top { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; }

.footer-brand { display: flex; align-items: center; gap: 0.6rem; font-family: var(--font-display); font-weight: 700; font-size: 0.85rem; line-height: 1.15; }

.footer-meta p { font-size: 0.85rem; color: var(--ink-soft); }

.footer-socials { display: flex; gap: 1rem; }
.footer-socials a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.footer-socials a:hover { border-color: var(--accent); background: var(--bg-alt); }
.footer-socials svg { width: 16px; height: 16px; fill: var(--ink); }

.footer-divider { border: none; border-top: 1px solid var(--border); margin: 2rem 0 1.4rem; }
.footer-copy { text-align: center; font-size: 0.85rem; color: var(--ink-soft); }

@media (max-width: 900px) {
  .navbar, .speakers, .pricing, .pipeline, .site-footer {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
  .nav-links { display: none; }
  .hero-content h1 { font-size: 2.3rem; }
  .speaker-grid, .pricing-grid { grid-template-columns: 1fr; }
  .price-card.featured { transform: none; }
  .footer-top { flex-direction: column; text-align: center; }
}