/* =============================================================================
   base.css — Fonts, Design Tokens, Reset & Global Utilities
   Author  : Aaron Dela Cruz
   Updated : 2026

   TABLE OF CONTENTS
   ─────────────────────────────────────────────────────────────────────────────
   0. Fonts           — @import (Google Fonts) + font-family tokens
                        ★ THIS IS THE ONLY PLACE YOU NEED TO CHANGE FONTS ★
   1. Design Tokens   — Colours, motion, spacing, and layout vars
   2. Reset           — Box-model, typography defaults, focus & selection styles
   3. Preloader       — Full-screen loading spinner (.preloader / .preloader-ring)
   4. Cursor Glow     — Desktop-only radial cursor effect (.cursor-glow)
   5. Scroll Reveal   — GSAP-driven reveal classes (.reveal, .reveal-left …)
   6. Layout Utils    — .container, .section-inner, z-index stacking
   7. Typography      — .section-label, .section-title, .gradient-text
   8. Buttons         — .btn, .btn-primary, .btn-ghost, .btn-sm
   9. Tag Pill        — .tag inline code/tech label
   10. Reduced Motion  — Blanket animation override for prefers-reduced-motion
   ─────────────────────────────────────────────────────────────────────────────
   QUICK EDITS:
     • Swap fonts       → §0 FONTS — change the @import URL + the three --font-* tokens
     • Brand colours    → §1 DESIGN TOKENS — --clr-accent / --clr-accent-2 / --clr-accent-3
     • Container width  → §1 DESIGN TOKENS — --container-max
     • Nav height       → §1 DESIGN TOKENS — --nav-height
   ============================================================================= */

/* ═══════════════════════════════════════════════════════════════════════════
   §0  FONTS
   ───────────────────────────────────────────────────────────────────────────
   HOW TO CHANGE FONTS
   ────────────────────
   1. Pick new families on https://fonts.google.com
   2. Copy the @import URL they give you and replace the one below.
   3. Update the three --font-* tokens in §1 DESIGN TOKENS to match.
   That's it — every component reads from those tokens, so nothing else
   needs to change.

   CURRENT FAMILIES
   ────────────────────
   Display : Syne         (headings, nav, buttons)       weights: 400 600 700 800
   Body    : DM Sans      (paragraphs, descriptions)     weights: 300 400 500  (opsz 9..40)
   Mono    : JetBrains Mono (code labels, kickers, tags) weights: 400 500

   SWAP EXAMPLE — replacing Syne with Inter for display:
     @import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700;800...');
     --font-display: 'Inter', sans-serif;
   ═══════════════════════════════════════════════════════════════════════════ */

@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');

/* ═══════════════════════════════════════════════════════════════════════════
   §1  DESIGN TOKENS  — single source of truth for the whole site
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
  /* Colours */
  --clr-bg: #060912;
  --clr-bg-2: #0a0e1c;
  --clr-bg-3: #10182b;
  --clr-bg-deep: #02050b;
  --clr-surface: rgba(232, 237, 248, 0.045);
  --clr-surface-2: rgba(232, 237, 248, 0.075);
  --clr-surface-3: rgba(232, 237, 248, 0.11);
  --clr-border: rgba(232, 237, 248, 0.095);
  --clr-border-2: rgba(108, 176, 235, 0.24);
  --clr-text: #e8edf8;
  --clr-text-muted: #7a8aaa;
  --clr-text-dim: #3d4a63;
  --clr-accent: #64b5f6;
  --clr-accent-2: #7d719d;
  --clr-accent-3: #00d4aa;
  --clr-glow: rgba(100, 181, 246, 0.22);
  /* Typography — mirror the families imported in §0 FONTS above */
  --font-display: 'Syne', sans-serif;
  /* headings, nav, labels, buttons  */
  --font-body: 'DM Sans', sans-serif;
  /* body copy, descriptions         */
  --font-mono: 'JetBrains Mono', monospace;
  /* kickers, tags, code, percentages */
  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  --transition-fast: 160ms var(--ease-out);
  --transition-normal: 280ms var(--ease-out);
  --transition-spring: 420ms var(--ease-out);
  /* Shape */
  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  /* Layout */
  --nav-height: 72px;
  --container-max: 1180px;
}

/* ═══════════════════════════════════════════════════════════════════════════
   §2  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-deep);
  color: var(--clr-text);
  overflow-x: hidden;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 50;
  pointer-events: none;
  opacity: .13;
  background-image: radial-gradient(circle at 20% 30%, rgba(255, 255, 255, .8) 0 1px, transparent 1px), radial-gradient(circle at 80% 70%, rgba(100, 181, 246, .7) 0 1px, transparent 1px);
  background-size: 180px 180px, 260px 260px;
  mix-blend-mode: screen;
}

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;
}

:focus-visible {
  outline: 2px solid var(--clr-accent);
  outline-offset: 4px;
}

::selection {
  color: var(--clr-bg-deep);
  background: var(--clr-accent);
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 10000;
  transform: translateY(-140%);
  padding: .7rem 1rem;
  border-radius: var(--radius-md);
  background: var(--clr-text);
  color: var(--clr-bg-deep);
  font-family: var(--font-display);
  font-weight: 700;
  transition: transform var(--transition-fast);
}

.skip-link:focus {
  transform: translateY(0);
}

/* ═══════════════════════════════════════════════════════════════════════════
   §3  PRELOADER  — shown until body.loaded class is added (js/main.js)
   Edit: preloader-text string in index.html, timing in main.js setTimeout
   ═══════════════════════════════════════════════════════════════════════════ */

.preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--clr-bg-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.7s ease 0.4s;
}

body.loaded .preloader {
  opacity: 0;
  pointer-events: none;
}

html.no-js .preloader {
  animation: noJsPreloaderFallback .01s linear 1.2s forwards;
}

.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);
  }
}

@keyframes noJsPreloaderFallback {
  to {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   §4  CURSOR GLOW  — desktop only, injected by js/main.js initCursorGlow()
   Edit: size (360px), blend mode, hover colour below
   ═══════════════════════════════════════════════════════════════════════════ */

.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%);
}

/* ═══════════════════════════════════════════════════════════════════════════
   §5  SCROLL REVEAL
   Classes are visible by default; GSAP animates FROM opacity:0 on scroll.
   Add class="reveal" / "reveal-left" / "reveal-right" to any element.
   ═══════════════════════════════════════════════════════════════════════════ */

/* Reveal classes are visible by default; GSAP handles the from-state. */

.no-js .reveal,
.no-js .reveal-child,
.no-js .reveal-left,
.no-js .reveal-right {
  opacity: 1;
  transform: none;
}

/* ═══════════════════════════════════════════════════════════════════════════
   §6  LAYOUT UTILITIES
   .container  → max-width wrapper (--container-max = 1180px)
   .section-inner → vertical padding for page sections
   ═══════════════════════════════════════════════════════════════════════════ */

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

.section-inner {
  padding: clamp(5.5rem, 10vw, 8.5rem) 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;
}

/* ═══════════════════════════════════════════════════════════════════════════
   §7  TYPOGRAPHY HELPERS
   Edit: .section-title font-size clamp() for heading scale
   ═══════════════════════════════════════════════════════════════════════════ */

.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: 1.04;
  color: var(--clr-text);
  text-wrap: balance;
}

.section-title-spaced {
  margin-bottom: 1.5rem;
}

.section-head {
  max-width: 760px;
  margin-bottom: 2.5rem;
}

.section-head-center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-head-center .section-label {
  justify-content: center;
}

.section-head-loose {
  margin-bottom: 4rem;
}

.gradient-text {
  color: var(--clr-accent);
  -webkit-text-fill-color: currentColor;
  background: none;
}

/* ═══════════════════════════════════════════════════════════════════════════
   §8  BUTTONS
   .btn-primary  → solid accent gradient CTA
   .btn-ghost    → outlined/transparent variant
   .btn-sm       → small size modifier
   ═══════════════════════════════════════════════════════════════════════════ */

.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: transform var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast);
  position: relative;
  overflow: hidden;
  transform: translateZ(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-2));
  color: var(--clr-text);
  box-shadow: 0 4px 24px var(--clr-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px var(--clr-glow);
}

.btn:active {
  transform: scale(.97);
}

.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;
}

/* ═══════════════════════════════════════════════════════════════════════════
   §9  TAG PILL  — tech stack / keyword chips (.tag)
   ═══════════════════════════════════════════════════════════════════════════ */

.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);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}