/* ============================================
   SHORT CIRCUIT — SHARED DESIGN SYSTEM
   Colors, typography, variables, and shared components
============================================ */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --electric-blue: #00A6FB;
  --electric-blue-glow: rgba(0, 166, 251, 0.15);
  --electric-blue-border: rgba(0, 166, 251, 0.3);
  --deep-navy: #0A1628;
  --deep-navy-light: #1A2744;
  --circuit-green: #00E676;
  --warm-amber: #FFB300;
  --soft-white: #F5F7FA;
  --mid-gray: #8892A4;
  --text-primary: #E8ECF2;
  --text-secondary: #9BA3B5;
  --card-bg: rgba(26, 39, 68, 0.6);
  --card-border: rgba(255, 255, 255, 0.06);
  --card-hover-border: rgba(0, 166, 251, 0.3);
  --glass-bg: rgba(10, 22, 40, 0.7);
  --glass-blur: 20px;
  --gradient-bar: linear-gradient(90deg, #00A6FB 0%, #00E676 50%, #FFB300 100%);
  --font-heading: 'Space Grotesk', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --max-width: 1100px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--deep-navy);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

body::before {
  content: '';
  display: block;
  height: 3px;
  background: var(--gradient-bar);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
}

a { color: var(--electric-blue); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: #33b8fc; }
img { max-width: 100%; height: auto; display: block; }

/* ============================================
   NAVIGATION
============================================ */
.nav {
  position: fixed;
  top: 3px;
  left: 0;
  right: 0;
  z-index: 900;
  padding: 0 24px;
  transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
}

.nav.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: 0 1px 0 var(--card-border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 4px;
  letter-spacing: -0.5px;
}

.nav-logo .zap { color: var(--electric-blue); font-size: 1.1em; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9em;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a:hover { color: var(--text-primary); }

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--electric-blue);
  transition: width var(--transition-smooth);
}

.nav-links a:hover::after { width: 100%; }

.nav-links a.active { color: var(--text-primary); }
.nav-links a.active::after { width: 100%; }

.nav-cta {
  background: var(--electric-blue);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85em;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 166, 251, 0.3);
  color: #fff !important;
}

.nav-cta::after { display: none; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 6px 0;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* ============================================
   PAGE HEADER (shared across subpages)
============================================ */
.page-header {
  padding: 140px 24px 60px;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(0, 166, 251, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0, 230, 118, 0.04) 0%, transparent 40%);
  pointer-events: none;
}

.page-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.page-header .section-label {
  font-family: var(--font-mono);
  font-size: 0.8em;
  font-weight: 500;
  color: var(--electric-blue);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.page-header h1 {
  font-family: var(--font-heading);
  font-size: clamp(2em, 4vw, 3em);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 16px;
}

.page-header .page-description {
  font-size: 1.1em;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 640px;
}

/* ============================================
   SHARED SECTION STYLES
============================================ */
.section {
  padding: 80px 24px;
  position: relative;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.8em;
  font-weight: 500;
  color: var(--electric-blue);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8em, 3vw, 2.4em);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 16px;
  line-height: 1.2;
}

.section-subtitle {
  font-size: 1.05em;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 48px;
}

/* ============================================
   BUTTONS
============================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--electric-blue);
  color: #fff;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95em;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 166, 251, 0.3);
  color: #fff;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.95em;
  border: 1px solid var(--card-border);
  transition: color var(--transition-fast), border-color var(--transition-fast);
  background: transparent;
  cursor: pointer;
}

.btn-secondary:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

/* ============================================
   CARDS
============================================ */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: border-color var(--transition-smooth), transform var(--transition-fast);
}

.card:hover {
  border-color: var(--card-hover-border);
  transform: translateY(-4px);
}

/* Skill tags */
.skill-tag {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.75em;
  font-weight: 500;
  font-family: var(--font-mono);
}

/* ============================================
   FOOTER
============================================ */
.footer {
  border-top: 1px solid var(--card-border);
  padding: 48px 24px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1em;
  color: var(--text-primary);
}

.footer-logo .zap { color: var(--electric-blue); }

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.85em;
  font-weight: 500;
}

.footer-links a:hover { color: var(--text-primary); }

.footer-copy {
  font-size: 0.8em;
  color: var(--mid-gray);
}

/* ============================================
   SCROLL ANIMATIONS
============================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  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; }

/* ============================================
   RESPONSIVE
============================================ */
@media (max-width: 900px) {
  .footer-inner {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
}

@media (max-width: 600px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--card-border);
  }

  .page-header { padding: 100px 20px 40px; }
  .section { padding: 60px 20px; }
}