:root {
  /* Colors */
  --bg-dark: #030014;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --primary: #00f2ea;
  --secondary: #a855f7; /* Purple */
  --accent: #ff0055;
  --text-main: #ffffff;
  --text-mute: #94a3b8;
  --border: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(255, 255, 255, 0.2);
  
  /* Gradients */
  --gradient-text: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  --gradient-glow: radial-gradient(circle at center, rgba(168, 85, 247, 0.15) 0%, transparent 70%);

  /* Fonts */
  --font-head: "Space Grotesk", sans-serif;
  --font-body: "Outfit", sans-serif;
  
  /* Spacing */
  --nav-height: 70px;
}

[data-theme="light"] {
  --bg-dark: #f0f4f8;
  --bg-card: rgba(255, 255, 255, 0.6);
  --bg-card-hover: rgba(255, 255, 255, 0.9);
  --primary: #0ea5e9;
  --secondary: #6366f1;
  --accent: #f43f5e;
  --text-main: #0f172a;
  --text-mute: #64748b;
  --border: rgba(0, 0, 0, 0.05);
  --border-hover: rgba(0, 0, 0, 0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.5s ease;
  padding-bottom: 80px; /* Space for sticky footer */
}

/* Background Effects */
.bg-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: 
    radial-gradient(circle at 15% 50%, rgba(168, 85, 247, 0.08), transparent 25%),
    radial-gradient(circle at 85% 30%, rgba(0, 242, 234, 0.08), transparent 25%);
  z-index: -2;
  pointer-events: none;
}

#grid-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.3;
  pointer-events: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 6rem 0;
  position: relative;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  z-index: 1000;
  backdrop-filter: blur(12px);
  background: rgba(3, 0, 20, 0.5);
  border-bottom: 1px solid var(--border);
  transition: 0.3s;
}

[data-theme="light"] .navbar {
  background: rgba(255, 255, 255, 0.7);
}

.nav-logo {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-main);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: var(--text-mute);
  text-decoration: none;
  font-size: 0.95rem;
  transition: 0.3s;
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: 0.3s;
}

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

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: var(--nav-height);
  position: relative;
  overflow: hidden;
}

.hero-content {
  z-index: 1;
  max-width: 900px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 100px;
  background: rgba(0, 242, 234, 0.1);
  border: 1px solid rgba(0, 242, 234, 0.2);
  color: var(--primary);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  animation: slideDown 0.8s ease-out;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 1.1;
  margin-bottom: 1.5rem;
  animation: fadeInUp 1s ease-out 0.2s backwards;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  color: var(--text-mute);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  animation: fadeInUp 1s ease-out 0.4s backwards;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  animation: fadeInUp 1s ease-out 0.6s backwards;
}

/* Bento Grid */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  display: flex;
  flex-direction: column;
}

.bento-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 24px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* Spotlight Effect */
.bento-card::after {
  content: "";
  position: absolute;
  height: 100%;
  width: 100%;
  top: 0;
  left: 0;
  background: radial-gradient(600px circle at var(--mouse-x) var(--mouse-y), rgba(255, 255, 255, 0.06), transparent 40%);
  opacity: 0;
  transition: opacity 0.5s;
  pointer-events: none;
  z-index: 2;
}

.bento-card:hover::after {
  opacity: 1;
}

.bento-card:hover {
  transform: translateY(-5px) scale(1.02);
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  box-shadow: 0 20px 40px -10px rgba(0,0,0,0.3);
}

.bento-span-2 {
  grid-column: span 1;
}

@media (min-width: 768px) {
  .bento-span-2 {
    grid-column: span 2;
  }
}

.card-icon {
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

/* Experience Timeline */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--secondary), transparent);
}

.timeline-item {
  position: relative;
  padding-left: 3rem;
  margin-bottom: 3rem;
}

.timeline-dot {
  position: absolute;
  left: -6px;
  top: 0;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-dark);
  border: 2px solid var(--primary);
  box-shadow: 0 0 10px var(--primary);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  transition: 0.3s;
}

.timeline-content:hover {
  background: var(--bg-card-hover);
  transform: translateX(10px);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.8rem 2rem;
  border-radius: 12px;
  font-weight: 600;
  text-decoration: none;
  transition: 0.3s;
  font-family: var(--font-head);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--primary);
  color: #000;
  box-shadow: 0 0 20px rgba(0, 242, 234, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 0 30px rgba(0, 242, 234, 0.5);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-main);
}

.btn-outline:hover {
  border-color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

/* Theme Toggle */
.theme-toggle {
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: rotate(15deg);
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0;
  text-align: center;
  background: rgba(0,0,0,0.2);
}

/* Sticky Footer */
.mobile-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(3, 0, 20, 0.8);
  backdrop-filter: blur(15px);
  border-top: 1px solid var(--border);
  padding: 1rem;
  z-index: 999;
  display: flex;
  gap: 1rem;
  box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.3);
}

.mobile-sticky-bar .btn {
  flex: 1;
  padding: 0.8rem;
  font-size: 1rem;
}

@media (min-width: 768px) {
  .mobile-sticky-bar {
    display: none;
  }
}

/* Animations */
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Mobile Nav */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* Simplify for now, or add mobile menu logic */
  }
  .mobile-menu-btn {
    display: block;
  }
  .navbar {
    padding: 0 1rem;
  }
  .timeline::before {
    left: 1rem;
  }
  .timeline-item {
    padding-left: 3rem;
  }
  .timeline-dot {
    left: calc(1rem - 6px);
  }
}