/*
 * ═══════════════════════════════════════════════════════════════
 *  NGAO LABS ACADEMY — Base Styles
 *  Reset, document defaults, typography scale, utilities,
 *  accessibility, and scrollbar.
 * ═══════════════════════════════════════════════════════════════
 */

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

/* ── Document ───────────────────────────────────────────────── */
html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  background-color: var(--surface-base);
  color: var(--text-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--surface-raised);
}
::-webkit-scrollbar-thumb {
  background: var(--gold-400);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--gold-300);
}

/* ── Typography ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--navy-800);
}

h1 { font-size: clamp(var(--text-4xl), 5.5vw, var(--text-7xl)); }
h2 { font-size: clamp(var(--text-3xl), 4vw,   var(--text-5xl)); }
h3 { font-size: clamp(var(--text-2xl), 3vw,   var(--text-3xl)); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

p:last-child { margin-bottom: 0; }

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

ul, ol { list-style: none; }

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

/* ── Accessibility ──────────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -999px;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-3) var(--space-6);
  background: var(--color-accent);
  color: var(--text-inverse);
  font-weight: 700;
  border-radius: var(--radius-md);
  transition: top var(--duration-fast) var(--ease-out-expo);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ── Layout Utilities ───────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (min-width: 768px)  { .container { padding-inline: var(--space-8); } }
@media (min-width: 1200px) { .container { padding-inline: var(--space-12); } }

.container--wide {
  max-width: var(--container-wide);
}

.section-padding {
  padding-block: var(--section-y);
}

/* ── Text Utilities ─────────────────────────────────────────── */
.text-gold {
  color: var(--gold-400);
}

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

.gradient-text {
  background: var(--gradient-gold-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }

/* ── Display Utilities ──────────────────────────────────────── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* ── Divider ────────────────────────────────────────────────── */
.divider {
  width: 48px;
  height: 3px;
  background: var(--gradient-gold);
  border-radius: var(--radius-full);
  margin-block: var(--space-6);
}

.divider--center {
  margin-inline: auto;
}

/* ── Section Label ──────────────────────────────────────────── */
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--gold-400);
  margin-bottom: var(--space-4);
}

.section-eyebrow::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--gold-400);
  border-radius: var(--radius-full);
}

/* ── Scroll Reveal Animation States ─────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity var(--duration-slower) var(--ease-out-expo),
    transform var(--duration-slower) var(--ease-out-expo);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal--left {
  transform: translateX(-32px);
}
.reveal--left.revealed {
  transform: translateX(0);
}

.reveal--right {
  transform: translateX(32px);
}
.reveal--right.revealed {
  transform: translateX(0);
}

.reveal--scale {
  transform: scale(0.92);
}
.reveal--scale.revealed {
  transform: scale(1);
}

/* Stagger delays */
.delay-1 { transition-delay: 100ms; }
.delay-2 { transition-delay: 200ms; }
.delay-3 { transition-delay: 300ms; }
.delay-4 { transition-delay: 400ms; }
.delay-5 { transition-delay: 500ms; }

/* ── Background Patterns ─────────────────────────────────────── */
.bg-grid {
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.bg-dots {
  background-image: radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* ── Gold shimmer keyframe ───────────────────────────────────── */
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-10px); }
}

@keyframes pulse-gold {
  0%, 100% { box-shadow: 0 0 0 0 rgba(201, 162, 39, 0); }
  50%       { box-shadow: 0 0 0 8px rgba(201, 162, 39, 0.15); }
}

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.5; }
  50%       { opacity: 1; }
}

@keyframes counter-up {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}