/* ═══════════════════════════════════════════════════════════════════
   css/base.css — Reset, globals, utilities
═══════════════════════════════════════════════════════════════════ */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg);
  color: var(--text-1);
  font-family: var(--ff-body);
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ── Scrollbar ────────────────────────────────────────────────── */
::-webkit-scrollbar         { width: 5px; }
::-webkit-scrollbar-track   { background: var(--bg-1); }
::-webkit-scrollbar-thumb   { background: rgba(79,216,255,0.25); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--cyan); }

/* ── Selection ────────────────────────────────────────────────── */
::selection { background: var(--cyan-dim); color: var(--cyan); }

/* ── Focus ────────────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ── Typography ───────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--ff-display);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  color: var(--text-1);
}

p { color: var(--text-2); line-height: var(--lh-relaxed); }

a { color: inherit; text-decoration: none; }

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

ul, ol { list-style: none; }

button { font-family: var(--ff-body); cursor: pointer; border: none; background: none; }

/* ── Container ────────────────────────────────────────────────── */
.container {
  width: min(var(--container-w), 100%);
  margin-inline: auto;
  padding-inline: var(--container-px);
}

/* ── Gradient text ────────────────────────────────────────────── */
.gradient-text {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--violet) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Buttons ──────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.8rem 1.9rem;
  border-radius: var(--radius-full);
  font-family: var(--ff-display);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform var(--t-fast) var(--ease-out),
    box-shadow var(--t-med) var(--ease-out),
    background var(--t-fast) var(--ease-std),
    border-color var(--t-fast) var(--ease-std);
}

.btn:active { transform: scale(0.97) !important; }

.btn-primary {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--violet) 100%);
  color: #060810;
  font-weight: var(--fw-bold);
  box-shadow: 0 0 28px var(--cyan-glow);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 48px var(--cyan-glow), 0 10px 28px rgba(79,216,255,0.25);
}

.btn-ghost {
  background: var(--surface);
  color: var(--text-1);
  border: 1px solid var(--border-hi);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-ghost:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 20px var(--cyan-dim), inset 0 0 20px var(--cyan-dim);
  transform: translateY(-3px);
}

/* ── Section base ─────────────────────────────────────────────── */
.section { padding-block: var(--section-py); position: relative; }

.section-label {
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 2rem;
  height: 1px;
  background: var(--cyan);
  flex-shrink: 0;
}

.section-title {
  font-size: var(--fs-4xl);
  margin-bottom: var(--space-6);
}

.section-desc {
  font-size: var(--fs-lg);
  color: var(--text-2);
  max-width: 54ch;
  line-height: var(--lh-relaxed);
}

/* ── Divider ──────────────────────────────────────────────────── */
.section-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-hi), transparent);
}

/* ── Skill tags (shared between sections) ─────────────────────── */
.skill-tag {
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  color: var(--cyan);
  background: var(--cyan-dim);
  border: 1px solid rgba(79,216,255,0.2);
  border-radius: var(--radius-full);
  padding: 2px 9px;
}

.skill-tag--violet {
  color: var(--violet);
  background: var(--violet-dim);
  border-color: rgba(155,123,255,0.2);
}

.skill-tag--amber {
  color: var(--amber);
  background: var(--amber-dim);
  border-color: rgba(255,180,84,0.2);
}

/* ── Scroll reveal ────────────────────────────────────────────── */
[data-reveal] {
  opacity: 0;
  transform: translateY(36px);
  transition:
    opacity var(--t-slow) var(--ease-out),
    transform var(--t-slow) var(--ease-out);
}

[data-reveal].revealed {
  opacity: 1;
  transform: none;
}

[data-reveal-delay="1"] { transition-delay: 0.1s; }
[data-reveal-delay="2"] { transition-delay: 0.2s; }
[data-reveal-delay="3"] { transition-delay: 0.3s; }
[data-reveal-delay="4"] { transition-delay: 0.4s; }
[data-reveal-delay="5"] { transition-delay: 0.5s; }
[data-reveal-delay="6"] { transition-delay: 0.6s; }

/* ── Reduced motion ───────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html { scroll-behavior: auto; }

  [data-reveal] { opacity: 1; transform: none; }
}