/* ============================================================
   PRACTICALX — BASE STYLES
   Reset, body defaults, typography scale.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,300&family=DM+Mono:wght@400;500&display=swap');

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

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

body {
  background: var(--color-bg);
  font-family: var(--font-body);
  font-weight: var(--font-weight-regular);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── NOISE TEXTURE ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

/* ── TYPOGRAPHY ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--font-weight-black);
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

h1 { font-size: var(--font-size-hero); letter-spacing: -3px; }
h2 { font-size: clamp(28px, 4vw, 44px); letter-spacing: var(--letter-spacing-tight); }
h3 { font-size: var(--font-size-xl); letter-spacing: var(--letter-spacing-snug); }
h4 { font-size: var(--font-size-lg); letter-spacing: var(--letter-spacing-snug); }

p {
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-muted);
  font-weight: var(--font-weight-light);
}

a {
  color: var(--color-accent2);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover { color: var(--color-text); }

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

ul, ol { list-style: none; }

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--section-padding-x);
}

.section {
  padding: var(--section-padding-y) var(--section-padding-x);
  position: relative;
  z-index: var(--z-base);
}

/* ── GRADIENT TEXT ── */
.gradient-text {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── SECTION LABEL ── */
.section-label {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  letter-spacing: var(--letter-spacing-widest);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
  display: block;
}

/* ── DIVIDER ── */
.divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-8) 0;
}

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}

@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

.animate-fade-up { animation: fadeUp 0.8s ease both; }
.animate-fade-up-1 { animation: fadeUp 0.8s ease 0.1s both; }
.animate-fade-up-2 { animation: fadeUp 0.8s ease 0.2s both; }
.animate-fade-up-3 { animation: fadeUp 0.8s ease 0.3s both; }
.animate-fade-up-4 { animation: fadeUp 0.8s ease 0.4s both; }

/* ── SCROLL REVEAL (JS adds .revealed) ── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }