/* ============================================================
   NullHz — GPU & AI Infrastructure Course
   Design system: NVIDIA-green dark theme
   ============================================================ */

:root {
  color-scheme: dark;
  /* Core palette */
  --bg:          #0a0a0a;
  --bg-raised:   #111111;
  --bg-card:     #161616;
  --line:        rgba(255,255,255,0.1);
  --line-strong: rgba(255,255,255,0.18);
  /* Accent — NVIDIA green */
  --green:       #76b900;
  --green-dim:   rgba(118,185,0,0.15);
  --green-glow:  rgba(118,185,0,0.35);
  --green-light: #a0e020;
  /* Secondary */
  --blue:        #3b9eff;
  --blue-dim:    rgba(59,158,255,0.12);
  --amber:       #f5a623;
  --amber-dim:   rgba(245,166,35,0.14);
  --red:         #ff4f4f;
  /* Text */
  --text:        #f2f2f2;
  --muted:       #888888;
  --faint:       #555555;
  /* Sizing */
  --max:         1200px;
  --radius:      10px;
}

/* ── Reset & base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p { margin-top: 0; }
ul { padding: 0; margin: 0; list-style: none; }

/* ── Typography ───────────────────────────────────────────── */
h1 {
  font-size: clamp(2.8rem, 6.5vw, 6.4rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}
h2 {
  font-size: clamp(2rem, 4vw, 3.6rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}
.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.mono {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
}

/* ── Buttons ──────────────────────────────────────────────── */
.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font: inherit;
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
  transition: all 0.18s ease;
  white-space: nowrap;
}
.button.primary {
  background: var(--green);
  color: #060e00;
  border-color: var(--green);
}
.button.primary:hover {
  background: var(--green-light);
  border-color: var(--green-light);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--green-glow);
}
.button.ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--text);
}
.button.ghost:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.3);
}
.button.large {
  min-height: 52px;
  padding: 0 28px;
  font-size: 1rem;
}

/* ── Nav ──────────────────────────────────────────────────── */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 70px;
  padding: 0 clamp(20px, 5vw, 64px);
  background: rgba(10,10,10,0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(20px) saturate(1.4);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.brand-icon { flex-shrink: 0; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); }
.nav-cta { font-size: 0.88rem; min-height: 38px; padding: 0 16px; }

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px clamp(20px, 5vw, 64px) 60px;
  overflow: hidden;
}
#gpuCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: #050808;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(10,10,10,0.97) 0%, rgba(10,10,10,0.82) 42%, rgba(10,10,10,0.2) 100%),
    linear-gradient(0deg, rgba(10,10,10,1) 0%, rgba(10,10,10,0.05) 50%, rgba(10,10,10,0.7) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr minmax(0, 420px);
  gap: clamp(32px, 6vw, 80px);
  align-items: end;
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  padding: 6px 14px 6px 10px;
  background: rgba(118,185,0,0.1);
  border: 1px solid rgba(118,185,0,0.3);
  border-radius: 100px;
  color: var(--green-light);
  font-size: 0.82rem;
  font-weight: 600;
}
.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse-dot 2.2s ease-in-out infinite;
  flex-shrink: 0;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.75); }
}
.hero-accent {
  background: linear-gradient(95deg, #76b900 0%, #a0e020 40%, #3b9eff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-copy {
  max-width: 640px;
  color: #c0c8d0;
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  line-height: 1.65;
  margin-bottom: 0;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 32px 0 36px;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
}
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-val {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--text);
  line-height: 1;
}
.stat-label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.limited-seats { color: var(--amber); }
.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--line-strong);
}

/* Hero card */
.hero-card {
  padding: 24px;
  background:
    linear-gradient(160deg, rgba(30,35,28,0.95), rgba(14,17,12,0.98)),
    radial-gradient(circle at 80% 20%, rgba(118,185,0,0.18) 0%, transparent 50%);
  border: 1px solid rgba(118,185,0,0.2);
  border-radius: 14px;
  box-shadow: 0 32px 100px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.04);
  backdrop-filter: blur(12px);
}
.hero-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}
.card-eyebrow {
  color: var(--green);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.card-badge {
  padding: 3px 10px;
  background: rgba(118,185,0,0.12);
  border: 1px solid rgba(118,185,0,0.25);
  border-radius: 100px;
  color: var(--green-light);
  font-size: 0.7rem;
  font-weight: 700;
}
.hero-module-list {
  display: grid;
  gap: 8px;
  padding: 0;
  list-style: none;
  margin: 0;
  counter-reset: none;
}
.hero-module-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 8px;
  transition: border-color 0.15s;
}
.hero-module-list li:hover {
  border-color: rgba(118,185,0,0.3);
}
.hero-module-list li.capstone-item {
  border-color: rgba(245,166,35,0.2);
  background: rgba(245,166,35,0.05);
}
.mod-num {
  flex-shrink: 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--green);
  width: 28px;
}
.mod-num.gold { color: var(--amber); }
.hero-module-list strong {
  display: block;
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.2;
}
.hero-module-list small {
  display: block;
  color: var(--muted);
  font-size: 0.73rem;
  margin-top: 1px;
}

/* ── Trust bar ────────────────────────────────────────────── */
.trust-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px clamp(20px, 5vw, 64px);
  background: var(--bg-raised);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.trust-label {
  flex-shrink: 0;
  color: var(--faint);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.trust-logos {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.trust-logos span {
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  font-weight: 500;
}
.trust-logos .dot { color: var(--faint); }

/* ── Sections ─────────────────────────────────────────────── */
.section {
  padding: 96px clamp(20px, 5vw, 64px);
}
.section-inner {
  max-width: var(--max);
  margin: 0 auto;
}
.section-heading { margin-bottom: 48px; }
.section-heading.centered { text-align: center; max-width: 700px; margin: 0 auto 56px; }

/* ── Who it's for ─────────────────────────────────────────── */
.who { background: var(--bg-raised); }

.lab-photo-wrap {
  position: relative;
  margin-bottom: 48px;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 24px 80px rgba(0,0,0,0.5);
}
.lab-photo {
  display: block;
  width: 100%;
  height: 380px;
  object-fit: cover;
  object-position: center 30%;
  filter: brightness(0.75) saturate(0.9);
}
.lab-photo-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(10,10,10,0.85) 100%);
  display: flex;
  align-items: flex-end;
  padding: 24px 28px;
}
.lab-photo-caption {
  color: rgba(255,255,255,0.7);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.persona-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.persona-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 14px;
  transition: border-color 0.2s, transform 0.2s;
}
.persona-card:hover {
  border-color: rgba(118,185,0,0.35);
  transform: translateY(-3px);
}
.persona-icon {
  margin-bottom: 18px;
}
.persona-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.persona-card p { color: var(--muted); font-size: 0.93rem; margin: 0; line-height: 1.65; }

/* ── Curriculum ───────────────────────────────────────────── */
.curriculum {
  position: relative;
  background: var(--bg);
  overflow: hidden;
}
.curriculum-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(118,185,0,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(118,185,0,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, transparent, #000 10%, #000 90%, transparent);
  pointer-events: none;
}
.curriculum .section-inner { position: relative; z-index: 1; }
.curriculum-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 48px;
}
.curriculum-heading > div { max-width: 600px; }

/* Curriculum track */
.curriculum-track {
  display: grid;
  gap: 0;
}
.module-card {
  display: grid;
  grid-template-columns: 80px minmax(0,1fr);
  gap: 0;
  align-items: stretch;
}
.mod-spine {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 28px;
}
.mod-node {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  background: #0d1a00;
  border: 2px solid var(--green);
  border-radius: 10px;
  color: var(--green);
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  font-weight: 700;
  box-shadow: 0 0 20px rgba(118,185,0,0.2), inset 0 0 0 1px rgba(118,185,0,0.1);
  flex-shrink: 0;
}
.mod-node.blue {
  background: rgba(59,158,255,0.08);
  border-color: var(--blue);
  color: var(--blue);
  box-shadow: 0 0 20px rgba(59,158,255,0.15);
}
.mod-node.gold {
  background: rgba(245,166,35,0.1);
  border-color: var(--amber);
  color: var(--amber);
  box-shadow: 0 0 20px rgba(245,166,35,0.2);
}
.mod-line {
  flex: 1;
  width: 2px;
  background: linear-gradient(180deg, var(--green) 0%, var(--blue) 50%, var(--amber) 100%);
  opacity: 0.3;
  margin-top: 8px;
  min-height: 32px;
}
.capstone .mod-line { display: none; }

.mod-content {
  margin: 0 0 28px 24px;
  padding: 28px 32px;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.02) 100%),
    var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.mod-content:hover {
  border-color: rgba(118,185,0,0.3);
  box-shadow: 0 16px 60px rgba(0,0,0,0.3);
}
.mod-content.blue-tint {
  background:
    linear-gradient(135deg, rgba(59,158,255,0.08) 0%, rgba(255,255,255,0.02) 100%),
    var(--bg-card);
}
.mod-content.blue-tint:hover { border-color: rgba(59,158,255,0.3); }
.capstone-content {
  background:
    linear-gradient(135deg, rgba(245,166,35,0.1) 0%, rgba(118,185,0,0.05) 100%),
    var(--bg-card) !important;
  border-color: rgba(245,166,35,0.2) !important;
}
.capstone-content:hover { border-color: rgba(245,166,35,0.45) !important; }

.mod-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.mod-tag {
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.mod-tag.foundation  { background: var(--green-dim);  color: var(--green-light); }
.mod-tag.performance { background: var(--blue-dim);    color: #7ab8ff; }
.mod-tag.engineering { background: var(--green-dim);  color: var(--green-light); }
.mod-tag.scale       { background: var(--blue-dim);    color: #7ab8ff; }
.mod-tag.ops         { background: var(--green-dim);  color: var(--green-light); }
.mod-tag.capstone-tag{ background: var(--amber-dim);  color: #ffc55e; }
.mod-duration {
  color: var(--faint);
  font-size: 0.78rem;
  font-family: 'JetBrains Mono', monospace;
}

.mod-content h3 { margin-bottom: 10px; }
.mod-content > p { color: var(--muted); font-size: 0.97rem; margin-bottom: 20px; }

.mod-detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.mod-detail {
  padding: 12px 14px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.detail-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 3px;
}
.detail-desc { color: var(--muted); font-size: 0.78rem; }

.topic-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}
.topic-pills span {
  padding: 5px 12px;
  background: rgba(118,185,0,0.08);
  border: 1px solid rgba(118,185,0,0.18);
  border-radius: 100px;
  color: #cce680;
  font-size: 0.8rem;
  font-weight: 600;
}
.topic-pills.blue-pills span {
  background: rgba(59,158,255,0.08);
  border-color: rgba(59,158,255,0.2);
  color: #a8d4ff;
}

/* Capstone outcomes */
.capstone-outcomes {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}
.outcome {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px;
  background: rgba(245,166,35,0.06);
  border: 1px solid rgba(245,166,35,0.15);
  border-radius: 10px;
}
.outcome-icon {
  flex-shrink: 0;
  margin-top: 2px;
}
.outcome strong { display: block; font-size: 0.95rem; margin-bottom: 4px; }
.outcome p { color: var(--muted); font-size: 0.84rem; margin: 0; }

/* ── Format ───────────────────────────────────────────────── */
.format {
  background: var(--bg-raised);
}
.format-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}
.format-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: rgba(118,185,0,0.08);
  border: 1px solid rgba(118,185,0,0.22);
  border-radius: 100px;
  color: #c4d8a0;
  font-size: 0.82rem;
  font-weight: 600;
}
.format-meta-item.urgent {
  background: rgba(245,166,35,0.08);
  border-color: rgba(245,166,35,0.25);
  color: #ffd08a;
}
.format-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(32px, 7vw, 96px);
  align-items: start;
}
.format > .section-inner > .format-layout > div > p {
  color: var(--muted);
  font-size: 0.97rem;
  margin-bottom: 16px;
}
.format > .section-inner > .format-layout > div > .button {
  margin-top: 8px;
}
.format-details { display: grid; gap: 16px; }
.format-card {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 14px;
  display: grid;
  gap: 18px;
}
.format-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.format-item svg { flex-shrink: 0; margin-top: 2px; }
.format-item strong {
  display: block;
  font-size: 0.92rem;
  margin-bottom: 2px;
}
.format-item span { color: var(--muted); font-size: 0.82rem; }
.measuring-panel {
  padding: 22px 24px;
  background: rgba(118,185,0,0.06);
  border: 1px solid rgba(118,185,0,0.18);
  border-radius: 14px;
}
.panel-label {
  color: var(--green-light);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.measuring-panel ul { display: grid; gap: 10px; }
.measuring-panel li {
  position: relative;
  padding-left: 18px;
  color: #c4d8a0;
  font-size: 0.88rem;
}
.measuring-panel li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  background: var(--green);
  border-radius: 50%;
}

/* ── GPU Die break ────────────────────────────────────────── */
.gpu-break {
  position: relative;
  height: 220px;
  overflow: hidden;
  background: #050a02;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
#gpuDieCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.gpu-break-text {
  position: absolute;
  bottom: 24px;
  left: clamp(20px, 5vw, 64px);
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 2;
}
.gpu-break-text .mono {
  color: rgba(118,185,0,0.45);
  font-size: 0.78rem;
}
.util-output {
  color: var(--green-light);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.88rem;
  min-height: 1.4em;
}

/* ── Interest form ────────────────────────────────────────── */
.interest { background: var(--bg); }
.interest-info-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.info-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(118,185,0,0.08);
  border: 1px solid rgba(118,185,0,0.22);
  border-radius: 100px;
  color: #c4d8a0;
  font-size: 0.8rem;
  font-weight: 600;
}
.urgent-chip {
  background: rgba(245,166,35,0.08);
  border-color: rgba(245,166,35,0.25);
  color: #ffd08a;
}
.interest-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(32px, 7vw, 96px);
  align-items: start;
}
.interest-text > p {
  color: var(--muted);
  font-size: 0.97rem;
  margin-bottom: 28px;
}
.interest-perks {
  display: grid;
  gap: 12px;
}
.perk {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: #c4d8a0;
}
.perk-icon {
  font-size: 0.7rem;
  color: var(--green);
}

/* Form */
.interest-form {
  display: grid;
  gap: 16px;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 32px 80px rgba(0,0,0,0.4);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
label {
  display: grid;
  gap: 6px;
  font-size: 0.84rem;
  font-weight: 700;
  color: #c0c8d0;
}
input, select, textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  color: var(--text);
  font: inherit;
  font-size: 0.92rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input::placeholder, textarea::placeholder { color: var(--faint); }
input:focus, select:focus, textarea:focus {
  border-color: rgba(118,185,0,0.5);
  box-shadow: 0 0 0 3px rgba(118,185,0,0.1);
}
select option { background: #1a1a1a; }
textarea { resize: vertical; min-height: 90px; }
.submit-btn { margin-top: 4px; width: 100%; justify-content: center; min-height: 50px; font-size: 0.97rem; }
.form-status {
  margin: 0;
  font-size: 0.85rem;
  color: var(--green-light);
  font-weight: 600;
  min-height: 20px;
  text-align: center;
}

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
  background: #060606;
  border-top: 1px solid var(--line);
  padding: 40px clamp(20px, 5vw, 64px);
}
.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 800;
  margin-right: 8px;
}
.footer-desc {
  color: var(--faint);
  font-size: 0.85rem;
  margin: 0;
  flex: 1;
}
.footer-email {
  color: var(--green);
  font-size: 0.85rem;
  font-weight: 600;
}
.footer-email:hover { color: var(--green-light); }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .hero-content { grid-template-columns: 1fr; }
  .hero-card { display: none; }
  .persona-grid { grid-template-columns: 1fr; }
  .format-layout { grid-template-columns: 1fr; }
  .interest-layout { grid-template-columns: 1fr; }
  .curriculum-heading { flex-direction: column; align-items: flex-start; }
  .module-card { grid-template-columns: 64px 1fr; }
  .mod-detail-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 12px; }
  .trust-bar { flex-direction: column; align-items: flex-start; }
  h1 { font-size: 2.6rem; }
  h2 { font-size: 2rem; }
}
@media (max-width: 600px) {
  .section { padding-top: 64px; padding-bottom: 64px; }
  .hero { padding-top: 100px; padding-bottom: 40px; }
  .mod-node { width: 42px; height: 42px; font-size: 0.82rem; }
  .mod-content { padding: 20px; margin-left: 14px; }
  .interest-form { padding: 22px; }
  .hero-stats { gap: 16px; }
  .stat-val { font-size: 1.4rem; }
}

/* ── Utility animations ───────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero-text > * { animation: fadeInUp 0.7s ease both; }
.hero-badge   { animation-delay: 0.05s; }
h1            { animation-delay: 0.15s; }
.hero-copy    { animation-delay: 0.25s; }
.hero-actions { animation-delay: 0.35s; }
.hero-stats   { animation-delay: 0.45s; }