/* ═══════════════════════════════════════════════════════════════
   INDEX — page-specific styles
   Relies on tokens from base.css: --bg, --fg, --muted, --dim,
   --accent, --accent-dim, .btn, .btn-primary, .btn-ghost, .btn-large
   ═══════════════════════════════════════════════════════════════ */

.main {
  min-height: 100vh;
  overflow-x: hidden;
}

/* ─────────────────────────────────────────────
   HERO
   ───────────────────────────────────────────── */
.hero {
  position: relative;
  padding: clamp(4rem, 10vh, 8rem) clamp(1.5rem, 5vw, 4rem) clamp(6rem, 14vh, 10rem);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60%;
  height: 80%;
  background: radial-gradient(circle at center, rgba(0, 255, 136, 0.06), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(3rem, 6vw, 6rem);
  align-items: center;
}

.hero-copy {
  max-width: 640px;
}

/* Eyebrow */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted, #6B6B6B);
  margin-bottom: 2rem;
}
.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent, #00FF88);
  box-shadow: 0 0 12px var(--accent, #00FF88);
}

/* Title */
.hero-title {
  font-family: 'Inter', sans-serif;
  font-size: clamp(2.75rem, 6.5vw, 5.75rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  font-weight: 600;
  color: var(--fg, #F0F0F0);
  margin: 0 0 1.75rem;
}
.hero-title em {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  font-weight: 400;
  color: var(--accent, #00FF88);
  letter-spacing: -0.015em;
  padding-right: 0.05em;
}

/* Lead */
.hero-lead {
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  line-height: 1.55;
  color: var(--muted, #9A9A9A);
  max-width: 540px;
  margin: 0 0 2.5rem;
}

/* CTAs */
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 2.5rem;
}

/* Meta strip */
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.75rem;
  padding: 0;
  margin: 0;
  list-style: none;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.78rem;
  color: var(--muted, #6B6B6B);
}
.hero-meta li {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.hero-meta i {
  width: 14px;
  height: 14px;
  color: var(--accent, #00FF88);
}

/* ─────────────────────────────────────────────
   HERO VISUAL — the 3D stage
   ───────────────────────────────────────────── */
.hero-visual {
  position: relative;
  perspective: 1800px;
  perspective-origin: 50% 35%;
}

.visual-stage {
  position: relative;
  aspect-ratio: 4 / 5;
  transform-style: preserve-3d;
}

/* Soft green glow behind */
.visual-glow {
  position: absolute;
  inset: -15%;
  background: radial-gradient(ellipse at 50% 40%,
    rgba(0, 255, 136, 0.35),
    rgba(0, 255, 136, 0.10) 40%,
    transparent 70%);
  filter: blur(50px);
  z-index: 0;
  animation: glowPulse 8s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.75; transform: scale(1); }
  50%      { opacity: 1;    transform: scale(1.05); }
}

/* The frame — tilted for 3D effect */
.visual-frame {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  border-radius: 20px;
  overflow: hidden;
  transform: rotateY(-9deg) rotateX(5deg);
  transition: transform 900ms cubic-bezier(0.16, 1, 0.3, 1);
  background: linear-gradient(135deg, #0A0A0A, #141414);
  box-shadow:
    0 40px 100px -20px rgba(0, 255, 136, 0.28),
    0 20px 60px -20px rgba(0, 0, 0, 0.8),
    0 0 0 1px rgba(255, 255, 255, 0.06),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.05);
}

.hero-visual:hover .visual-frame {
  transform: rotateY(-4deg) rotateX(2deg);
}

/* When you drop <img class="visual-image"> */
.visual-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Placeholder (while no image) */
.visual-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background:
    linear-gradient(135deg, rgba(0, 255, 136, 0.03), transparent),
    repeating-linear-gradient(45deg,
      transparent 0 20px,
      rgba(255, 255, 255, 0.015) 20px 21px);
}
.placeholder-label {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.8rem;
  color: var(--accent, #00FF88);
  letter-spacing: 0.05em;
}
.placeholder-hint {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.7rem;
  color: var(--muted, #555);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Floor reflection */
.visual-reflection {
  position: absolute;
  top: 95%;
  left: 8%;
  right: 8%;
  height: 35%;
  background: radial-gradient(ellipse at center top,
    rgba(0, 255, 136, 0.20),
    transparent 70%);
  filter: blur(25px);
  z-index: 0;
  opacity: 0.7;
}

/* ─────────────────────────────────────────────
   SECTION SCAFFOLDING
   ───────────────────────────────────────────── */
.section {
  padding: clamp(5rem, 12vh, 9rem) clamp(1.5rem, 5vw, 4rem);
  position: relative;
}

.section-head {
  max-width: 1280px;
  margin: 0 auto clamp(3rem, 6vh, 5rem);
}

.section-eyebrow {
  display: inline-block;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.75rem;
  color: var(--muted, #6B6B6B);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.section-title {
  font-family: 'Inter', sans-serif;
  font-size: clamp(2rem, 4.5vw, 3.75rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 600;
  color: var(--fg, #F0F0F0);
  margin: 0;
  max-width: 900px;
}
.section-title em {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  font-weight: 400;
  color: var(--accent, #00FF88);
}

.section-lead {
  margin-top: 1rem;
  font-size: 1.1rem;
  color: var(--muted, #9A9A9A);
  max-width: 600px;
  line-height: 1.5;
}

/* ─────────────────────────────────────────────
   FEATURES
   ───────────────────────────────────────────── */
.features-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.feature-card {
  padding: 2rem 1.75rem 2.25rem;
  border: 1px solid var(--dim, #1F1F1F);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.015), transparent);
  transition: border-color 250ms ease, transform 300ms ease;
}
.feature-card:hover {
  border-color: rgba(0, 255, 136, 0.25);
  transform: translateY(-2px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid rgba(0, 255, 136, 0.15);
  color: var(--accent, #00FF88);
  margin-bottom: 1.5rem;
}
.feature-icon i {
  width: 20px;
  height: 20px;
}

.feature-card h3 {
  font-family: 'Inter', sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--fg, #F0F0F0);
  margin: 0 0 0.5rem;
}

.feature-card p {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--muted, #9A9A9A);
  margin: 0;
}

/* ─────────────────────────────────────────────
   LESSON PREVIEW
   ───────────────────────────────────────────── */
.lessons-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.lesson-card {
  display: block;
  padding: 2rem 1.75rem 2rem;
  border: 1px solid var(--dim, #1F1F1F);
  border-radius: 14px;
  text-decoration: none;
  color: inherit;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.015), transparent);
  transition: border-color 250ms ease, transform 300ms ease;
  position: relative;
}
.lesson-card:hover {
  border-color: rgba(0, 255, 136, 0.30);
  transform: translateY(-2px);
}
.lesson-card:hover .lesson-cta i {
  transform: translateX(4px);
}

.lesson-num {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  font-size: 2.5rem;
  color: var(--accent, #00FF88);
  line-height: 1;
  margin-bottom: 1.25rem;
}

.lesson-level {
  display: inline-block;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}
.lesson-level--beginner {
  background: rgba(0, 255, 136, 0.10);
  color: var(--accent, #00FF88);
  border: 1px solid rgba(0, 255, 136, 0.20);
}
.lesson-level--intermediate {
  background: rgba(255, 191, 0, 0.08);
  color: #FFBF00;
  border: 1px solid rgba(255, 191, 0, 0.20);
}
.lesson-level--advanced {
  background: rgba(255, 90, 90, 0.08);
  color: #FF7070;
  border: 1px solid rgba(255, 90, 90, 0.20);
}

.lesson-card h3 {
  font-family: 'Inter', sans-serif;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--fg, #F0F0F0);
  margin: 0 0 0.6rem;
  line-height: 1.25;
}

.lesson-card p {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--muted, #9A9A9A);
  margin: 0 0 1.5rem;
}

.lesson-cta {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.8rem;
  color: var(--accent, #00FF88);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.lesson-cta i {
  width: 14px;
  height: 14px;
  transition: transform 250ms ease;
}

.lessons-more {
  max-width: 1280px;
  margin: 3rem auto 0;
  text-align: center;
}

/* ─────────────────────────────────────────────
   FINAL CTA
   ───────────────────────────────────────────── */
.cta {
  text-align: center;
  padding-block: clamp(6rem, 14vh, 10rem);
  position: relative;
}
.cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(0, 255, 136, 0.06), transparent 60%);
  pointer-events: none;
}

.cta-inner {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.cta-title {
  font-family: 'Inter', sans-serif;
  font-size: clamp(2.25rem, 5.5vw, 4.5rem);
  line-height: 1;
  letter-spacing: -0.04em;
  font-weight: 600;
  color: var(--fg, #F0F0F0);
  margin: 1rem 0 1.5rem;
}
.cta-title em {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  font-weight: 400;
  color: var(--accent, #00FF88);
}

.cta-lead {
  font-size: 1.1rem;
  color: var(--muted, #9A9A9A);
  margin: 0 0 2.5rem;
}

/* ─────────────────────────────────────────────
   RESPONSIVE
   ───────────────────────────────────────────── */
@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }
  .hero-visual {
    max-width: 460px;
    margin: 0 auto;
    width: 100%;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .lessons-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: clamp(2.5rem, 6vh, 4rem);
  }
  .hero-meta {
    gap: 1rem 1.5rem;
  }
  .hero-ctas {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-ctas .btn {
    justify-content: center;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .visual-frame {
    transform: rotateY(-6deg) rotateX(3deg);
  }
}

/* Motion respect */
@media (prefers-reduced-motion: reduce) {
  .visual-glow,
  .visual-frame,
  .lesson-card,
  .feature-card {
    animation: none !important;
    transition: none !important;
  }
}


/* Override when a self-contained 3D image is dropped in */
.visual-frame:has(.visual-image) {
  transform: none;
  background: transparent;
  border-radius: 0;
  box-shadow: none;
}
.hero-visual:has(.visual-image) .visual-frame:hover {
  transform: none;
}
.hero-visual:has(.visual-image) .visual-glow,
.hero-visual:has(.visual-image) .visual-reflection {
  opacity: 0.4;
}
.visual-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}