/* ============================================================
   GLOBALS — Tanmay Garg Portfolio
   Dark · Cinematic · Emotional · Minimal
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Syne:wght@400;500;600;700;800&family=Geist+Mono:wght@300;400;500&display=swap');

/* ---------- Tokens ---------- */
:root {
  --bg:          #080808;
  --bg-1:        #0e0e0e;
  --bg-2:        #141414;
  --card:        #111111;
  --card-border: rgba(255,255,255,0.07);
  --card-hover:  rgba(255,255,255,0.04);

  --text:        #e8e6e0;
  --text-muted:  #7a7a7a;
  --text-faint:  #3a3a3a;

  --accent:      #ff4444;
  --accent-2:    #ff8899;
  --accent-glow: rgba(255,68,68,0.2);

  --red:         #c0392b;
  --wine:        #6b0f1a;

  --radius-sm:   8px;
  --radius:      16px;
  --radius-lg:   24px;
  --radius-xl:   36px;

  --fs-xs:   0.72rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-md:   1.125rem;
  --fs-lg:   1.5rem;
  --fs-xl:   2rem;
  --fs-2xl:  3rem;
  --fs-3xl:  4.5rem;
  --fs-4xl:  7rem;

  --ease-out:   cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in:    cubic-bezier(0.64, 0, 0.78, 0);
  --ease-spring:cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  overflow-x: hidden;
  cursor: default;
}

::selection { background: var(--accent); color: #fff; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 2px; }

/* ---------- Typography ---------- */
h1,h2,h3,h4,h5 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.mono { font-family: 'Geist Mono', monospace; }

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

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

/* ---------- Layout ---------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 50px;
  margin: 15px auto;
  max-width: 1200px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.section:hover {
  border-color: rgba(255,68,68,0.4);
  background: var(--bg-1);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

/* ---------- Grain Overlay ---------- */
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='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.4;
}

/* ---------- Cards ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.card:hover {
  border-color: rgba(255,68,68,0.4);
  background: var(--bg-1);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: none;
  transition: all 0.25s var(--ease-out);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: #e63333;
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(255,68,68,0.3);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--card-border);
}
.btn-ghost:hover {
  border-color: rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.04);
  transform: translateY(-2px);
}

/* ---------- Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background: rgba(139,26,46,0.12);
  color: #d4868f;
  border: 1px solid rgba(139,26,46,0.2);
  border-radius: 100px;
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---------- Section Labels ---------- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--accent);
}

/* ---------- Dividers ---------- */
.divider {
  display: none;
}

/* ---------- Fade-in animation ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.fade-up.visible {
  opacity: 1;
  transform: none;
}

/* ---------- Section Gradients ---------- */
#education-home {
  position: relative;
  background: 
    radial-gradient(ellipse 1200px 900px at 20% 50%, rgba(0,120,100,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 1000px 1100px at 80% 20%, rgba(0,100,90,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 1100px 800px at 50% 80%, rgba(0,80,70,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 900px 1000px at 40% 30%, rgba(0,110,95,0.1) 0%, transparent 60%),
    linear-gradient(135deg, #070909 0%, #080808 100%) !important;
  border-color: rgba(0,100,90,0.2) !important;
  animation: eduGradientShift 15s ease-in-out infinite;
}

@keyframes eduGradientShift {
  0% {
    background: 
      radial-gradient(ellipse 1200px 900px at 20% 50%, rgba(0,120,100,0.15) 0%, transparent 60%),
      radial-gradient(ellipse 1000px 1100px at 80% 20%, rgba(0,100,90,0.12) 0%, transparent 60%),
      radial-gradient(ellipse 1100px 800px at 50% 80%, rgba(0,80,70,0.12) 0%, transparent 60%),
      radial-gradient(ellipse 900px 1000px at 40% 30%, rgba(0,110,95,0.1) 0%, transparent 60%),
      linear-gradient(135deg, #070909 0%, #080808 100%);
  }
  25% {
    background: 
      radial-gradient(ellipse 1200px 900px at 60% 30%, rgba(0,120,100,0.15) 0%, transparent 60%),
      radial-gradient(ellipse 1000px 1100px at 30% 70%, rgba(0,100,90,0.12) 0%, transparent 60%),
      radial-gradient(ellipse 1100px 800px at 70% 40%, rgba(0,80,70,0.12) 0%, transparent 60%),
      radial-gradient(ellipse 900px 1000px at 50% 60%, rgba(0,110,95,0.1) 0%, transparent 60%),
      linear-gradient(135deg, #070909 0%, #080808 100%);
  }
  50% {
    background: 
      radial-gradient(ellipse 1200px 900px at 70% 70%, rgba(0,120,100,0.15) 0%, transparent 60%),
      radial-gradient(ellipse 1000px 1100px at 20% 40%, rgba(0,100,90,0.12) 0%, transparent 60%),
      radial-gradient(ellipse 1100px 800px at 50% 20%, rgba(0,80,70,0.12) 0%, transparent 60%),
      radial-gradient(ellipse 900px 1000px at 60% 70%, rgba(0,110,95,0.1) 0%, transparent 60%),
      linear-gradient(135deg, #070909 0%, #080808 100%);
  }
  75% {
    background: 
      radial-gradient(ellipse 1200px 900px at 40% 60%, rgba(0,120,100,0.15) 0%, transparent 60%),
      radial-gradient(ellipse 1000px 1100px at 75% 50%, rgba(0,100,90,0.12) 0%, transparent 60%),
      radial-gradient(ellipse 1100px 800px at 30% 70%, rgba(0,80,70,0.12) 0%, transparent 60%),
      radial-gradient(ellipse 900px 1000px at 30% 40%, rgba(0,110,95,0.1) 0%, transparent 60%),
      linear-gradient(135deg, #070909 0%, #080808 100%);
  }
  100% {
    background: 
      radial-gradient(ellipse 1200px 900px at 20% 50%, rgba(0,120,100,0.15) 0%, transparent 60%),
      radial-gradient(ellipse 1000px 1100px at 80% 20%, rgba(0,100,90,0.12) 0%, transparent 60%),
      radial-gradient(ellipse 1100px 800px at 50% 80%, rgba(0,80,70,0.12) 0%, transparent 60%),
      radial-gradient(ellipse 900px 1000px at 40% 30%, rgba(0,110,95,0.1) 0%, transparent 60%),
      linear-gradient(135deg, #070909 0%, #080808 100%);
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  :root {
    --fs-4xl: 3.5rem;
    --fs-3xl: 2.5rem;
    --fs-2xl: 2rem;
  }
  .container { padding: 0 20px; }
  .section { padding: 40px 20px; margin: 20px auto; }
}