/* =========================================
   The ML Drop by Ingenium AI — styles.css
   ========================================= */

:root {
  --bg: #0d0f14;
  --surface: #161b27;
  --surface-2: #1e2535;
  --border: #2a3147;
  --accent: #6c63ff;
  --accent-light: #8b85ff;
  --accent-glow: rgba(108, 99, 255, 0.2);
  --text: #e8eaf0;
  --text-muted: #8b93a8;
  --text-dim: #5a6378;
  --white: #ffffff;
  --success: #22d3a0;
  --warning: #f59e0b;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-accent: 0 4px 32px rgba(108, 99, 255, 0.25);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

/* ---- Layout ---- */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 80px 0;
}

section:nth-child(even) {
  background: var(--surface);
}

/* ---- Typography ---- */
h1, h2, h3 {
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.25rem); }
h3 { font-size: 1.2rem; }

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 12px;
}

.section-title {
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin-bottom: 48px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 40px rgba(108, 99, 255, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--accent-light);
  border: 2px solid var(--accent);
}

.btn-outline:hover {
  background: var(--accent-glow);
  transform: translateY(-2px);
}

.btn-large {
  padding: 18px 44px;
  font-size: 1.1rem;
  border-radius: 10px;
}

/* ========================================= */
/* NAVBAR */
/* ========================================= */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 15, 20, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  font-weight: 700;
  font-size: 1rem;
  color: var(--white);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.nav-logo span {
  color: var(--accent-light);
}

.nav-cta {
  padding: 8px 20px;
  font-size: 0.9rem;
}

/* ========================================= */
/* HERO */
/* ========================================= */
#hero {
  padding: 100px 0 90px;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(108, 99, 255, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.hero-badge .dot {
  width: 7px;
  height: 7px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

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

#hero h1 {
  color: var(--white);
  margin-bottom: 8px;
}

#hero h1 .highlight {
  background: linear-gradient(135deg, var(--accent-light), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--text-muted);
  margin: 20px 0 40px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.hero-meta {
  color: var(--text-dim);
  font-size: 0.88rem;
}

.hero-meta strong {
  color: var(--text-muted);
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--white);
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ========================================= */
/* WHO IS THIS FOR */
/* ========================================= */
#who {
  background: var(--surface);
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.audience-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.2s;
}

.audience-card:hover {
  border-color: var(--accent);
}

.audience-icon {
  font-size: 2rem;
  margin-bottom: 14px;
}

.audience-card h3 {
  color: var(--white);
  margin-bottom: 8px;
}

.audience-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* ========================================= */
/* CURRICULUM */
/* ========================================= */
#curriculum {
  background: var(--bg);
}

.curriculum-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.curriculum-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s, transform 0.2s;
}

.curriculum-item:hover {
  border-color: var(--accent);
  transform: translateX(4px);
}

.curriculum-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--accent-light);
}

.curriculum-content h3 {
  color: var(--white);
  margin-bottom: 4px;
}

.curriculum-content p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ========================================= */
/* HOW IT WORKS */
/* ========================================= */
#how-it-works {
  background: var(--surface);
}

.how-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

.how-card {
  text-align: center;
  padding: 32px 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.how-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.how-card h3 {
  color: var(--white);
  margin-bottom: 8px;
}

.how-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.schedule-box {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  align-items: center;
  justify-content: space-between;
}

.schedule-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.schedule-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  font-weight: 600;
}

.schedule-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
}

/* ========================================= */
/* INSTRUCTOR */
/* ========================================= */
#instructor {
  background: var(--bg);
}

.instructor-card {
  display: flex;
  gap: 48px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
}

.instructor-photo-wrap {
  flex-shrink: 0;
}

.instructor-photo {
  width: 160px;
  height: 160px;
  border-radius: var(--radius);
  object-fit: cover;
  border: 2px solid var(--border);
  background: var(--surface-2);
  display: block;
}

.instructor-photo-placeholder {
  width: 160px;
  height: 160px;
  border-radius: var(--radius);
  border: 2px dashed var(--border);
  background: var(--surface-2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 0.78rem;
  text-align: center;
  padding: 16px;
}

.instructor-photo-placeholder span {
  font-size: 2rem;
}

.instructor-info h3 {
  font-size: 1.5rem;
  color: var(--white);
  margin-bottom: 4px;
}

.instructor-title {
  color: var(--accent-light);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.instructor-bio {
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 24px;
}

.instructor-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 5px 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ========================================= */
/* PRICING */
/* ========================================= */
#pricing {
  background: var(--surface);
}

.pricing-card {
  background: var(--bg);
  border: 2px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 640px;
  box-shadow: var(--shadow-accent);
  position: relative;
  overflow: hidden;
}

.pricing-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #a78bfa);
}

.pricing-badge {
  display: inline-block;
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  color: var(--accent-light);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.pricing-amount {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 8px;
}

.price-number {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--white);
}

.price-note {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.pricing-desc {
  color: var(--text-muted);
  margin-bottom: 32px;
}

.includes-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 40px;
}

.includes-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text);
}

.includes-list li::before {
  content: '';
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  background: var(--success);
  border-radius: 50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230d0f14' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
  background-size: 12px;
  background-repeat: no-repeat;
  background-position: center;
}

/* ========================================= */
/* FAQ */
/* ========================================= */
#faq {
  background: var(--bg);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 720px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s;
}

.faq-item:hover {
  border-color: var(--accent);
}

.faq-question {
  padding: 20px 24px;
  font-weight: 600;
  color: var(--white);
  font-size: 1rem;
  cursor: default;
}

.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.75;
}

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

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-brand {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--white);
}

.footer-brand span {
  color: var(--accent-light);
}

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

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s;
}

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

.footer-copy {
  color: var(--text-dim);
  font-size: 0.8rem;
  text-align: center;
  margin-top: 20px;
  padding: 0 24px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

/* ========================================= */
/* RESPONSIVE */
/* ========================================= */
@media (max-width: 700px) {
  section { padding: 56px 0; }

  #hero { padding: 64px 0 56px; }

  .hero-stats {
    gap: 24px;
    margin-top: 40px;
    padding-top: 28px;
  }

  .instructor-card {
    flex-direction: column;
    padding: 32px 24px;
    gap: 28px;
  }

  .instructor-photo,
  .instructor-photo-placeholder {
    width: 120px;
    height: 120px;
  }

  .pricing-card {
    padding: 32px 24px;
  }

  .schedule-box {
    flex-direction: column;
    gap: 20px;
    padding: 24px;
  }

  .how-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 400px) {
  .how-grid {
    grid-template-columns: 1fr;
  }
}