/* =============================================================================
  base.css — Design Tokens, Reset & Global Utilities
  Author : Aaron Dela Cruz
  Updated: 2025
   ============================================================================= */

/* ─── Google Fonts ────────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500&family=JetBrains+Mono:wght@400;500&display=swap');

/* ─── Design Tokens ───────────────────────────────────────────────────────── */
:root {
  /* Colours */
  --clr-bg:          #050810;
  --clr-bg-2:        #0a0f1e;
  --clr-bg-3:        #0d1426;
  --clr-surface:     rgba(255,255,255,0.04);
  --clr-surface-2:   rgba(255,255,255,0.07);
  --clr-border:      rgba(255,255,255,0.08);
  --clr-border-2:    rgba(100,180,255,0.2);
  --clr-text:        #e8edf8;
  --clr-text-muted:  #7a8aaa;
  --clr-text-dim:    #3d4a63;
  --clr-accent:      #4da6ff;
  --clr-accent-2:    #7b5ea7;
  --clr-accent-3:    #00d4aa;
  --clr-glow:        rgba(77,166,255,0.25);

  /* Typography */
  --font-display: 'Syne', sans-serif;
  --font-body:    'DM Sans', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  /* Motion */
  --transition-fast:   150ms cubic-bezier(0.4,0,0.2,1);
  --transition-normal: 300ms cubic-bezier(0.4,0,0.2,1);
  --transition-spring: 500ms cubic-bezier(0.34,1.56,0.64,1);

  /* Shape */
  --radius-sm:   6px;
  --radius-md:   14px;
  --radius-lg:   24px;
  --radius-full: 9999px;

  /* Layout */
  --nav-height: 72px;
  --container-max: 1180px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--clr-bg);
  color: var(--clr-text);
  overflow-x: hidden;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, video    { max-width: 100%; display: block; }
a             { color: inherit; text-decoration: none; }
button        { cursor: pointer; border: none; background: none; font-family: inherit; }
ul, ol        { list-style: none; }
input,
textarea      { font-family: inherit; font-size: inherit; }

/* ─── Preloader ───────────────────────────────────────────────────────────── */
.preloader {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--clr-bg);
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.7s ease 0.4s;
}
body.loaded .preloader { opacity: 0; pointer-events: none; }
.preloader-inner {
  display: flex; flex-direction: column;
  align-items: center; gap: 1.5rem;
}
.preloader-ring {
  width: 56px; height: 56px;
  border: 2px solid var(--clr-border);
  border-top-color: var(--clr-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
.preloader-text {
  font-family: var(--font-mono);
  font-size: 0.7rem; letter-spacing: 0.2em;
  color: var(--clr-text-muted); text-transform: uppercase;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Cursor glow (desktop only) ─────────────────────────────────────────── */
.cursor-glow {
  position: fixed; top: 0; left: 0;
  width: 360px; height: 360px; border-radius: 50%;
  background: radial-gradient(circle, var(--clr-glow) 0%, transparent 70%);
  pointer-events: none; z-index: 0;
  mix-blend-mode: screen;
  transform: translate(-50%, -50%);
}
.cursor-glow--hover {
  background: radial-gradient(circle, rgba(100,180,255,0.4) 0%, transparent 65%);
}

/* ─── Scroll-reveal animations ────────────────────────────────────────────── */
.reveal {
  opacity: 0; transform: translateY(32px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.revealed { opacity: 1; transform: translateY(0); }

.reveal-child {
  opacity: 0; transform: translateY(20px);
  transition: opacity .5s ease, transform .5s ease;
}
.reveal-child.revealed { opacity: 1; transform: translateY(0); }

.reveal-left {
  opacity: 0; transform: translateX(-40px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal-left.revealed { opacity: 1; transform: translateX(0); }

.reveal-right {
  opacity: 0; transform: translateX(40px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal-right.revealed { opacity: 1; transform: translateX(0); }

/* ─── Layout utilities ────────────────────────────────────────────────────── */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

.section-inner  { padding: 7rem 0; }
@media (max-width: 768px) { .section-inner { padding: 5rem 0; } }

/* Section content above satellite (z-index:1) */
section .container,
section > .section-inner,
.footer > .container { position: relative; z-index: 2; }

/* ─── Typography helpers ──────────────────────────────────────────────────── */
.section-label {
  font-family: var(--font-mono);
  font-size: .75rem; letter-spacing: .15em; text-transform: uppercase;
  color: var(--clr-accent); margin-bottom: 1rem;
  display: flex; align-items: center; gap: 1rem;
}
.section-label::before {
  content: ''; display: block;
  width: 28px; height: 1px; background: var(--clr-accent);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800; line-height: 1.1; color: var(--clr-text);
}

.gradient-text {
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .8rem 1.6rem; border-radius: var(--radius-full);
  font-family: var(--font-display); font-weight: 600;
  font-size: .9rem; letter-spacing: .03em;
  transition: var(--transition-spring);
  position: relative; overflow: hidden;
}
.btn-primary {
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-2));
  color: #fff; box-shadow: 0 4px 24px var(--clr-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px var(--clr-glow); }
.btn-ghost {
  background: transparent; color: var(--clr-text);
  border: 1px solid var(--clr-border-2);
}
.btn-ghost:hover { border-color: var(--clr-accent); color: var(--clr-accent); transform: translateY(-2px); }
.btn-sm { padding: .5rem 1rem; font-size: .8rem; }

/* ─── Tag pill ────────────────────────────────────────────────────────────── */
.tag {
  display: inline-block; padding: .25rem .75rem;
  border-radius: var(--radius-full);
  background: var(--clr-surface); border: 1px solid var(--clr-border);
  font-family: var(--font-mono); font-size: .72rem; color: var(--clr-text-muted);
}