/* ============================================================
   ADRIENALIN — main.css
   Dark gaming aesthetic · Neon blue · Mobile-first
   ============================================================ */

/* ── Custom properties ───────────────────────────────────── */
:root {
  --bg-base:      #080c16;
  --bg-surface:   #0c1220;
  --bg-raised:    #111828;
  --bg-border:    #1c2a42;

  --text-primary: #e8eeff;
  --text-muted:   #7a8db0;
  --text-faint:   #334466;

  --accent:       #4facff;
  --accent-dim:   #1a6fcc;
  --accent-glow:  rgba(79, 172, 255, 0.15);

  --logo-shadow:  0 0 12px rgba(79, 172, 255, 0.7), 0 0 32px rgba(79, 172, 255, 0.35);

  --danger:       #ff4d6d;

  --font-sans:    'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm:    4px;
  --radius-md:    8px;
  --radius-lg:    16px;
  --radius-xl:    24px;

  --shadow-glow:  0 0 40px rgba(79, 172, 255, 0.12);
  --transition:   180ms ease;

  --container:    1200px;
  --gap:          clamp(1.5rem, 4vw, 3rem);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, video { display: block; max-width: 100%; }

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--text-primary); }

ul, ol { list-style: none; }

h1, h2, h3, h4 {
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.2rem, 6vw, 4rem); }
h2 { font-size: clamp(1.6rem, 4vw, 2.6rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.4rem); }

p { color: var(--text-muted); max-width: 68ch; }

/* ── Utilities ───────────────────────────────────────────── */
.container { width: min(100%, var(--container)); margin-inline: auto; padding-inline: clamp(1rem, 5vw, 2rem); }

.section { padding-block: clamp(3rem, 8vw, 6rem); }

.section-title { margin-bottom: 0.75rem; }
.section-sub { font-size: 1.1rem; margin-bottom: 2.5rem; max-width: 60ch; }
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.text-accent { color: var(--accent); }
.sep { width: 4px; height: 4px; background: var(--text-faint); border-radius: 50%; display: inline-block; vertical-align: middle; margin-inline: 0.75rem; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-accent {
  background: var(--accent);
  color: #000;
}
.btn-accent:hover { background: #fff; color: #000; box-shadow: var(--shadow-glow); }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--bg-border);
}
.btn-ghost:hover { color: var(--text-primary); border-color: var(--text-muted); }

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-outline:hover { background: var(--accent); color: #000; }

.btn-sm { padding: 0.45rem 0.9rem; font-size: 0.85rem; }
.btn-lg { padding: 0.9rem 2rem; font-size: 1rem; }

/* ── Nav ─────────────────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(8, 8, 14, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--bg-border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding-inline: clamp(1rem, 5vw, 2rem);
  max-width: var(--container);
  margin-inline: auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-img {
  width: auto;
  display: block;
  transition: filter var(--transition), opacity var(--transition);
}
.nav-logo:hover .logo-img {
  filter: drop-shadow(var(--logo-shadow));
}

.logo-img-footer {
  opacity: 0.9;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition);
}
.nav-links a:not(.btn):hover { color: var(--text-primary); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-muted);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* main content needs top padding to clear fixed nav */
#main-content { padding-top: 64px; }

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: min(90vh, 860px);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-ecg-cnv {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  display: block;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(79,172,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,172,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
}
.hero-glow-1 { width: 600px; height: 600px; background: rgba(79,172,255,0.10); top: -200px; right: -150px; }
.hero-glow-2 { width: 400px; height: 400px; background: rgba(15,45,90,0.6); bottom: -100px; left: -100px; }

.hero-inner {
  position: relative;
  z-index: 2;
  padding-block: clamp(4rem, 10vw, 8rem);
}

.hero-badge {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--accent-dim);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.hero-title {
  margin-bottom: 1.25rem;
  max-width: 14ch;
}

.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  margin-bottom: 2.5rem;
  max-width: 52ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-platforms {
  display: flex;
  align-items: center;
  gap: 0;
  font-size: 0.8rem;
  color: var(--text-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ── Features ────────────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1px;
  background: var(--bg-border);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.feature-card {
  background: var(--bg-surface);
  padding: 2rem;
  transition: background var(--transition);
}
.feature-card:hover { background: var(--bg-raised); }

.feature-icon {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.feature-card h3 { margin-bottom: 0.5rem; }
.feature-card p { font-size: 0.95rem; }

/* ── How It Works ────────────────────────────────────────── */
.hiw-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 2rem;
  align-items: start;
}

.hiw-divider {
  width: 1px;
  background: var(--bg-border);
  align-self: stretch;
}

.hiw-track-title {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
}

.hiw-steps { display: flex; flex-direction: column; gap: 2rem; }

.hiw-steps li {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.step-num {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent-dim);
  border-radius: var(--radius-sm);
  padding: 0.25rem 0.5rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.hiw-steps strong { display: block; margin-bottom: 0.25rem; color: var(--text-primary); }
.hiw-steps p { font-size: 0.9rem; margin: 0; }

.hiw-cta { margin-top: 3rem; text-align: center; }

/* How It Works full page */
.hiw-full-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.hiw-steps-full li { padding-bottom: 2rem; border-bottom: 1px solid var(--bg-border); }
.hiw-steps-full li:last-child { border-bottom: none; }

/* ── Instructor CTA ──────────────────────────────────────── */
.instructor-cta { background: var(--bg-surface); }

.instructor-cta-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.instructor-cta-text h2 { margin-bottom: 1rem; }
.instructor-cta-text p { margin-bottom: 2rem; }

.instructor-cta-stats {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1rem;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem;
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-md);
  background: var(--bg-raised);
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}

.stat-label { font-size: 0.8rem; color: var(--text-muted); }

/* ── Follow the build ────────────────────────────────────── */
.follow-build {
  background: var(--bg-surface);
  border-top: 1px solid var(--bg-border);
}
.follow-build-inner { max-width: 640px; }
.follow-build-inner h2 { margin-bottom: 0.75rem; }
.follow-build-inner p { margin-bottom: 2rem; }
.follow-build-actions { display: flex; flex-wrap: wrap; gap: 1rem; }

/* ── Waitlist ─────────────────────────────────────────────── */
.waitlist {
  background:
    radial-gradient(ellipse 60% 60% at 50% 100%, rgba(79,172,255,0.06) 0%, transparent 70%),
    var(--bg-base);
  border-top: 1px solid var(--bg-border);
}

.waitlist-inner { text-align: center; }
.waitlist-inner .section-title,
.waitlist-inner .section-sub { margin-inline: auto; }

.waitlist-form { display: flex; flex-direction: column; gap: 1rem; align-items: center; max-width: 500px; margin-inline: auto; }

.form-type-toggle {
  display: flex;
  gap: 0.75rem;
}

.type-option {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition);
}
.type-option input { accent-color: var(--accent); cursor: pointer; }
.type-option:has(input:checked) { color: var(--text-primary); }

.form-row { display: flex; gap: 0.75rem; width: 100%; }

.input-email, .input-field {
  flex: 1;
  background: var(--bg-surface);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-md);
  padding: 0.7rem 1rem;
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  font-family: inherit;
}
.input-email:focus, .input-field:focus {
  outline: none;
  border-color: var(--accent);
}
.input-email::placeholder, .input-field::placeholder { color: var(--text-faint); }

.consent-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  text-align: left;
  max-width: 500px;
  cursor: pointer;
}
.consent-label input { margin-top: 2px; flex-shrink: 0; accent-color: var(--accent); }

.waitlist-result {
  padding: 1.5rem 2rem;
  border-radius: var(--radius-md);
  max-width: 500px;
  margin-inline: auto;
  text-align: center;
}
.waitlist-success { background: rgba(0,245,160,0.1); border: 1px solid var(--accent-dim); }
.waitlist-success p { color: var(--accent); }
.waitlist-error { background: rgba(255,77,109,0.1); border: 1px solid var(--danger); }
.waitlist-error p { color: var(--danger); }
.waitlist-already { background: var(--bg-surface); border: 1px solid var(--bg-border); }

/* ── Blog ────────────────────────────────────────────────── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.blog-card {
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-surface);
  transition: border-color var(--transition), transform var(--transition);
}
.blog-card:hover { border-color: var(--accent); transform: translateY(-2px); }

.blog-card-link { display: block; text-decoration: none; color: inherit; height: 100%; }

.blog-card-img img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }

.blog-card-body { padding: 1.5rem; }

.blog-card-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.75rem; }

.tag {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent-dim);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.blog-card-title { margin-bottom: 0.5rem; font-size: 1.1rem; color: var(--text-primary); }
.blog-card-excerpt { font-size: 0.9rem; margin-bottom: 1rem; -webkit-line-clamp: 3; display: -webkit-box; -webkit-box-orient: vertical; overflow: hidden; }
.blog-card-meta { font-size: 0.8rem; color: var(--text-faint); display: flex; gap: 0.75rem; }

.load-more-wrap { grid-column: 1 / -1; text-align: center; padding-top: 1rem; }

.empty-state { color: var(--text-faint); text-align: center; padding: 4rem 0; }

/* ── Blog post ───────────────────────────────────────────── */
.post-header { border-bottom: 1px solid var(--bg-border); }
.post-header-inner { max-width: 800px; }
.post-title { margin-block: 0.75rem 1rem; }
.post-meta { display: flex; gap: 1rem; font-size: 0.85rem; color: var(--text-faint); }
.author { color: var(--text-muted); }

.post-hero-img { margin-bottom: 3rem; }

.post-body {
  max-width: 800px;
  margin-bottom: 3rem;
  font-size: 1.05rem;
  line-height: 1.8;
}
.post-body h2, .post-body h3 { margin-top: 2.5rem; margin-bottom: 0.75rem; color: var(--text-primary); }
.post-body p { color: var(--text-muted); margin-bottom: 1.25rem; max-width: 100%; }
.post-body ul, .post-body ol { padding-left: 1.5rem; margin-bottom: 1.25rem; list-style: revert; }
.post-body li { color: var(--text-muted); margin-bottom: 0.4rem; }
.post-body code {
  font-family: var(--font-mono);
  background: var(--bg-raised);
  border: 1px solid var(--bg-border);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
  color: var(--accent);
}
.post-body pre {
  background: var(--bg-raised);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}
.post-body pre code { background: none; border: none; padding: 0; }
.post-body blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1.25rem;
  margin-left: 0;
  margin-bottom: 1.25rem;
}
.post-body blockquote p { color: var(--text-muted); font-style: italic; }
.post-body a { color: var(--accent); }
.post-body a:hover { text-decoration: underline; }
.post-body img { border-radius: var(--radius-md); margin-block: 1.5rem; }

.post-footer { margin-bottom: 3rem; }

/* ── Page hero ───────────────────────────────────────────── */
.page-hero { border-bottom: 1px solid var(--bg-border); }
.page-hero-inner { max-width: 800px; }
.page-hero-inner h1 { margin-bottom: 0.75rem; }
.page-hero-sub { font-size: 1.15rem; max-width: 60ch; }

/* ── About ───────────────────────────────────────────────── */
.about-cols { display: grid; grid-template-columns: 1fr 300px; gap: 4rem; align-items: start; }
.about-text h2 { margin-top: 2.5rem; margin-bottom: 0.75rem; }
.about-text h2:first-child { margin-top: 0; }
.about-text p { max-width: 100%; margin-bottom: 1.25rem; }

.about-meta {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.about-fact {
  display: flex;
  flex-direction: column;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--bg-border);
}
.about-fact:last-child { border-bottom: none; }
.fact-label { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-faint); margin-bottom: 0.25rem; }
.fact-value { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); }

/* ── Benefits grid ───────────────────────────────────────── */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.benefit-card {
  padding: 1.75rem;
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
}
.benefit-card h3 { margin-bottom: 0.5rem; }
.benefit-card p { font-size: 0.95rem; margin: 0; }

/* ── Process steps ───────────────────────────────────────── */
.process-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-width: 720px;
}
.process-steps li {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  padding: 2rem;
  border-bottom: 1px solid var(--bg-border);
}
.process-steps li:last-child { border-bottom: none; }
.process-steps strong { display: block; margin-bottom: 0.25rem; color: var(--text-primary); }
.process-steps p { font-size: 0.9rem; margin: 0; }

/* ── Instructor contact CTA ──────────────────────────────── */
.instructor-contact-cta {
  background: var(--bg-surface);
  border-top: 1px solid var(--bg-border);
}

/* ── FTMS explainer ──────────────────────────────────────── */
.ftms-explainer { background: var(--bg-surface); border-top: 1px solid var(--bg-border); border-bottom: 1px solid var(--bg-border); }
.ftms-explainer .section-sub { max-width: 80ch; }

/* ── Contact ─────────────────────────────────────────────── */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; }
.contact-info h2 { margin-bottom: 1rem; }
.contact-info p { margin-bottom: 2rem; }
.contact-item { margin-bottom: 1rem; }
.contact-label { display: block; font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-faint); margin-bottom: 0.25rem; }

.contact-company {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--bg-border);
}
.contact-company h3 {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  margin-bottom: 0.75rem;
}
.contact-company p,
.contact-company address {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: normal;
  line-height: 1.7;
  max-width: 100%;
  margin: 0;
}

.contact-form { display: flex; flex-direction: column; gap: 1.25rem; }

/* ── Contact submit loading state ────────────────────────── */
.submit-busy  { display: none; align-items: center; gap: 0.5rem; }
.submit-idle  { display: inline; }

/* HTMX adds .htmx-request to the form while the request is in flight */
.contact-form.htmx-request .submit-idle { display: none; }
.contact-form.htmx-request .submit-busy { display: inline-flex; }
.contact-form.htmx-request .contact-submit-btn {
  opacity: 0.65;
  cursor: not-allowed;
  pointer-events: none;
}

.submit-spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(0, 0, 0, 0.25);
  border-top-color: #000;
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
  flex-shrink: 0;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label { font-size: 0.85rem; font-weight: 600; color: var(--text-muted); }
textarea.input-field { resize: vertical; min-height: 120px; }

/* ── Legal ───────────────────────────────────────────────── */
.legal-container { max-width: 800px; }
.legal-body h2 { margin-top: 2.5rem; margin-bottom: 0.75rem; font-size: 1.2rem; }
.legal-body p, .legal-body li { color: var(--text-muted); margin-bottom: 0.75rem; font-size: 0.95rem; }
.legal-body ul { list-style: disc; padding-left: 1.5rem; margin-bottom: 1rem; }
.legal-body a { color: var(--accent); }

.cookie-table { width: 100%; border-collapse: collapse; margin-block: 1.5rem; font-size: 0.9rem; }
.cookie-table th, .cookie-table td { text-align: left; padding: 0.75rem 1rem; border: 1px solid var(--bg-border); }
.cookie-table th { background: var(--bg-raised); color: var(--text-primary); font-weight: 600; }
.cookie-table td { color: var(--text-muted); }

/* ── Footer ──────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--bg-border);
  background: var(--bg-surface);
  padding-top: 3rem;
}

.footer-inner {
  display: flex;
  gap: 4rem;
  justify-content: space-between;
  align-items: flex-start;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 2rem);
  padding-bottom: 3rem;
}

.footer-tagline { font-size: 0.85rem; color: var(--text-faint); margin-top: 0.5rem; max-width: 100%; }

.footer-nav { display: flex; gap: 3rem; flex-wrap: wrap; }

.footer-col { display: flex; flex-direction: column; gap: 0.75rem; }
.footer-col h3 { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-faint); }
.footer-col a { font-size: 0.9rem; color: var(--text-muted); text-decoration: none; transition: color var(--transition); }
.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
  border-top: 1px solid var(--bg-border);
  padding: 1.25rem clamp(1rem, 5vw, 2rem);
  max-width: var(--container);
  margin-inline: auto;
}
.footer-bottom p { font-size: 0.8rem; color: var(--text-faint); max-width: 100%; }

/* ── Error pages ─────────────────────────────────────────── */
.error-page { min-height: 60vh; display: flex; align-items: center; }
.error-inner { text-align: center; }
.error-code { font-size: 8rem; font-weight: 900; color: var(--accent); opacity: 0.15; display: block; line-height: 1; }
.error-inner h1 { margin-bottom: 0.75rem; margin-top: -1rem; }
.error-inner p { margin-bottom: 2rem; margin-inline: auto; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .hiw-grid { grid-template-columns: 1fr; }
  .hiw-divider { display: none; }
  .instructor-cta-inner { grid-template-columns: 1fr; }
  .instructor-cta-stats { grid-template-columns: repeat(3, 1fr); }
  .hiw-full-grid { grid-template-columns: 1fr; }
  .about-cols { grid-template-columns: 1fr; }
  .about-meta { position: static; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 2rem; }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    height: calc(100dvh - 64px); /* explicit height — flex won't shrink to content */
    background: var(--bg-base);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 2.5rem 2rem;
    gap: 0;
    border-top: 1px solid var(--bg-border);
    overflow-y: auto;
    z-index: 99;
  }
  .nav-links.open { display: flex; }
  .nav-links a:not(.btn) {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-muted);
    width: 100%;
    padding: 1rem 0;
    border-bottom: 1px solid var(--bg-border);
  }
  .nav-links a:not(.btn):last-of-type { border-bottom: none; }
  .nav-links .btn {
    margin-top: 2rem;
    width: 100%;
    justify-content: center;
    font-size: 1rem;
    padding: 0.9rem 1.5rem;
  }
  .nav-toggle { display: flex; }

  .form-row { flex-direction: column; }
  .instructor-cta-stats { grid-template-columns: 1fr; }
  .footer-nav { flex-direction: column; gap: 2rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}