/* ═══════════════════════════════════════
   base.css — Reset & global styles
═══════════════════════════════════════ */

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

html {
  scroll-behavior: smooth;
}

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

/* Subtle noise overlay for depth */
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='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.4;
}

/* Scrollbar */
::-webkit-scrollbar       { width: 4px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-surface2); border-radius: 4px; }

/* Links */
a { color: inherit; text-decoration: none; }

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Sections */
section {
  padding: var(--space-2xl) 0;
}

/* Alternate section backgrounds */
#services,
#resume,
#skills {
  background: var(--color-bg2);
}

/* ── Section Header ── */
.section-header {
  margin-bottom: var(--space-xl);
}

.section-header--center {
  text-align: center;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}
.section-tag::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--color-accent);
}
.section-header--center .section-tag::before {
  display: none;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 300;
  color: var(--color-white);
  line-height: 1.1;
}
.section-title em {
  font-style: italic;
  color: var(--color-accent);
}

.section-desc {
  margin-top: var(--space-sm);
  font-size: 16px;
  color: var(--color-muted);
  max-width: 500px;
  line-height: 1.8;
}
.section-header--center .section-desc {
  margin: var(--space-sm) auto 0;
}

/* ── Buttons ── */
.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.04em;
  transition: var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
  font-family: var(--font-body);
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent2);
  border-color: var(--color-accent2);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(201, 169, 110, 0.25);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border2);
}
.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ── Stack Tags ── */
.stack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.stack-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  background: var(--color-bg3);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 11px;
  color: var(--color-muted);
}
.stack-tag i { font-size: 10px; color: var(--color-accent); }

/* ── Scroll fade-in animation ── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Smooth transition when toggling themes */
body, 
section, 
#header, 
#site-footer, 
.service-card, 
.portfolio-card, 
.cert-card, 
.skill-card, 
.contact-card, 
.timeline-dot, 
.mobile-nav, 
.modal-box,
.btn-ghost,
.btn-primary,
.filter-btn,
.stack-tag,
.logo,
#main-nav a {
  transition: background var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
}