/* =========================================
   PORTFOLIO — Global Styles
   Theme: Futuristic Glassmorphism / Neon Blue
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,300&display=swap');

/* ── CSS Variables ── */
:root {
  --bg-0: #03050f;
  --bg-1: #070b1a;
  --bg-2: #0d1225;
  --neon: #00c8ff;
  --neon-dim: rgba(0, 200, 255, 0.18);
  --neon-glow: 0 0 18px rgba(0, 200, 255, 0.55), 0 0 40px rgba(0, 200, 255, 0.2);
  --glass: rgba(255, 255, 255, 0.045);
  --glass-border: rgba(0, 200, 255, 0.15);
  --text-primary: #eaf4ff;
  --text-secondary: rgba(234, 244, 255, 0.55);
  --text-muted: rgba(234, 244, 255, 0.3);
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --radius: 16px;
  --radius-sm: 8px;
  --transition: cubic-bezier(0.22, 1, 0.36, 1);
  --nav-h: 72px;

  /* Light mode overrides (toggled via JS) */
  --lm-bg-0: #f0f4ff;
  --lm-bg-1: #e4ecff;
  --lm-bg-2: #d6e2ff;
  --lm-text-primary: #0a0f2e;
  --lm-text-secondary: rgba(10,15,46,0.6);
  --lm-glass: rgba(255,255,255,0.6);
  --lm-glass-border: rgba(0,120,200,0.25);
}

body.light {
  --bg-0: var(--lm-bg-0);
  --bg-1: var(--lm-bg-1);
  --bg-2: var(--lm-bg-2);
  --glass: var(--lm-glass);
  --glass-border: var(--lm-glass-border);
  --text-primary: var(--lm-text-primary);
  --text-secondary: var(--lm-text-secondary);
  --text-muted: rgba(10,15,46,0.35);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--bg-0);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.4s var(--transition), color 0.4s var(--transition);
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }

/* ── Canvas Particle Background ── */
#particle-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.6;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-1); }
::-webkit-scrollbar-thumb { background: var(--neon); border-radius: 4px; }

/* ── Page Wrapper ── */
.page-wrapper {
  position: relative;
  z-index: 1;
}

/* ── NAV ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.5rem, 5vw, 4rem);
  background: rgba(3, 5, 15, 0.7);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  transition: background 0.4s;
}

body.light .nav { background: rgba(220, 232, 255, 0.8); }

.nav__logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff 30%, var(--neon));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav__links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  position: relative;
  transition: color 0.25s;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--neon);
  border-radius: 2px;
  transition: width 0.3s var(--transition);
  box-shadow: var(--neon-glow);
}

.nav__links a:hover,
.nav__links a.active { color: var(--neon); }
.nav__links a:hover::after,
.nav__links a.active::after { width: 100%; }

/* Theme Toggle */
.theme-toggle {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  width: 52px; height: 28px;
  cursor: pointer;
  position: relative;
  transition: background 0.3s;
}
.theme-toggle::after {
  content: '🌙';
  font-size: 14px;
  position: absolute;
  top: 50%; left: 6px;
  transform: translateY(-50%);
  transition: all 0.35s var(--transition);
}
body.light .theme-toggle::after { content: '☀️'; left: 28px; }

/* Hamburger */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav__burger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s var(--transition);
}

/* ── GLASS CARD ── */
.glass-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px);
  border-radius: var(--radius);
  transition: transform 0.35s var(--transition), box-shadow 0.35s var(--transition), border-color 0.35s;
}
.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 200, 255, 0.12);
  border-color: rgba(0, 200, 255, 0.35);
}

/* ── SECTION BASE ── */
.section {
  padding: clamp(5rem, 10vw, 8rem) clamp(1.5rem, 5vw, 4rem);
  max-width: 1200px;
  margin: 0 auto;
}

.section__label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--neon);
  margin-bottom: 0.75rem;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.section__sub {
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.7;
  max-width: 540px;
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 50px;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: all 0.3s var(--transition);
  border: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--neon) 0%, #0066ff 100%);
  color: #fff;
  box-shadow: 0 0 24px rgba(0, 200, 255, 0.4);
}
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #0066ff 0%, var(--neon) 100%);
  opacity: 0;
  transition: opacity 0.3s;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,200,255,0.5); }
.btn-primary:hover::before { opacity: 1; }
.btn-primary span { position: relative; z-index: 1; }

.btn-outline {
  background: transparent;
  color: var(--neon);
  border: 1.5px solid var(--neon);
}
.btn-outline:hover {
  background: var(--neon-dim);
  box-shadow: var(--neon-glow);
  transform: translateY(-2px);
}

/* ── CHIP / TAG ── */
.chip {
  display: inline-block;
  padding: 0.3rem 0.85rem;
  background: var(--neon-dim);
  border: 1px solid rgba(0,200,255,0.25);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--neon);
  letter-spacing: 0.05em;
}

/* ── SCROLL REVEAL (JS adds .revealed) ── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s var(--transition), transform 0.7s var(--transition);
}
.reveal.revealed {
  opacity: 1;
  transform: none;
}
.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; }

/* ── FOOTER ── */
.footer {
  border-top: 1px solid var(--glass-border);
  padding: 2rem clamp(1.5rem, 5vw, 4rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer__socials {
  display: flex;
  gap: 1rem;
}
.footer__socials a {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  display: grid;
  place-items: center;
  font-size: 1rem;
  transition: all 0.3s var(--transition);
}
.footer__socials a:hover {
  border-color: var(--neon);
  color: var(--neon);
  box-shadow: var(--neon-glow);
  transform: translateY(-2px);
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .nav__links {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    background: rgba(3,5,15,0.97);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    transform: translateY(-110%);
    transition: transform 0.4s var(--transition);
  }
  body.light .nav__links { background: rgba(220,232,255,0.97); }
  .nav__links.open { transform: translateY(0); }
  .nav__burger { display: flex; }
}

/* ── GLOW ORBS (decorative background blobs) ── */
.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  animation: orbFloat 8s ease-in-out infinite alternate;
}
.orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,200,255,0.08) 0%, transparent 70%);
  top: -200px; right: -200px;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0,80,255,0.07) 0%, transparent 70%);
  bottom: 10%; left: -150px;
  animation-delay: -4s;
}
@keyframes orbFloat {
  from { transform: translate(0,0) scale(1); }
  to { transform: translate(30px, 20px) scale(1.05); }
}