/* =============================================
   2026 Design Trends Applied:
   - Dark Mode with Vibrant Gradients
   - Glassmorphism
   - Bento Grid Layout
   - Cursor Glow Effect
   - Mesh Gradients
   - Micro-interactions
   ============================================= */

/* CSS Variables */
:root {
  /* Colors - Light Theme with Warm Gradients */
  --bg-primary: #fafafa;
  --bg-secondary: #ffffff;
  --bg-card: rgba(0, 0, 0, 0.02);
  --bg-glass: rgba(255, 255, 255, 0.7);

  --text-primary: #1a1a2e;
  --text-secondary: rgba(26, 26, 46, 0.7);
  --text-muted: rgba(26, 26, 46, 0.5);

  /* Gradient Colors - Warm & Vibrant */
  --gradient-1: #667eea; /* Soft Indigo */
  --gradient-2: #764ba2; /* Purple */
  --gradient-3: #f093fb; /* Pink */
  --gradient-4: #4facfe; /* Sky Blue */

  --accent: #667eea;
  --accent-glow: rgba(102, 126, 234, 0.25);

  /* Spacing */
  --section-padding: clamp(80px, 15vh, 150px);
  --container-width: min(1200px, 90vw);

  /* Typography */
  --font-main: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Effects */
  --border-radius: 20px;
  --glass-blur: blur(20px);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

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

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

/* Cursor Glow Effect */
.cursor-glow {
  position: fixed;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(102, 126, 234, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.3s;
}

body:hover .cursor-glow {
  opacity: 1;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.nav.scrolled {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 40px;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gradient-1), var(--gradient-3));
  transition: var(--transition);
}

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(250, 250, 250, 0.98);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 40px;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.mobile-menu.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu a {
  font-size: 2rem;
  font-weight: 600;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.4;
  animation: float 20s ease-in-out infinite;
}

.orb-1 {
  width: 600px;
  height: 600px;
  background: var(--gradient-1);
  top: -200px;
  right: -100px;
  animation-delay: 0s;
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: var(--gradient-3);
  bottom: -150px;
  left: -100px;
  animation-delay: -5s;
}

.orb-3 {
  width: 400px;
  height: 400px;
  background: var(--gradient-4);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: -10s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(50px, -50px) scale(1.1); }
  50% { transform: translate(-30px, 30px) scale(0.95); }
  75% { transform: translate(-50px, -20px) scale(1.05); }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 20px;
}

.hero-greeting {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 0.2s;
}

.hero-title {
  font-size: clamp(3rem, 12vw, 8rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 30px;
}

.title-line {
  display: block;
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
}

.title-line:nth-child(1) { animation-delay: 0.4s; }
.title-line:nth-child(2) { animation-delay: 0.6s; }

.gradient-text {
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2), var(--gradient-3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% 200%;
  animation: gradientShift 5s ease infinite, fadeInUp 0.8s ease forwards;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 40px;
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 0.8s;
}

.hero-cta {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 1s;
}

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

/* Buttons */
.btn {
  padding: 16px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  color: white;
  box-shadow: 0 10px 40px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 50px var(--accent-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(0, 0, 0, 0.15);
}

.btn-ghost:hover {
  background: rgba(0, 0, 0, 0.05);
  border-color: rgba(0, 0, 0, 0.25);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50% { opacity: 0.5; transform: scaleY(0.8); }
}

/* Sections */
.section {
  padding: var(--section-padding) 0;
  position: relative;
}

.container {
  width: var(--container-width);
  margin: 0 auto;
}

.section-header {
  margin-bottom: 60px;
}

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

.section-tag {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
}

.section-desc {
  color: var(--text-secondary);
  margin-top: 15px;
  font-size: 1.1rem;
}

/* About Section */
.about {
  background: var(--bg-secondary);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: center;
}

.about-image {
  position: relative;
}

.image-frame {
  aspect-ratio: 4/5;
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.06);
  position: relative;
  z-index: 1;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.1);
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #f0f0f5, #e8e8f0);
  color: var(--text-muted);
  font-size: 1.5rem;
  text-align: center;
  line-height: 1.4;
}

.image-decoration {
  position: absolute;
  inset: 20px -20px -20px 20px;
  border: 2px solid var(--accent);
  border-radius: var(--border-radius);
  opacity: 0.3;
}

/* Bento Grid */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: auto auto auto;
  gap: 20px;
}

.bento-card {
  background: var(--bg-secondary);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--border-radius);
  padding: 30px;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.bento-card:hover {
  border-color: rgba(0, 0, 0, 0.1);
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

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

.bento-intro h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.bento-intro p {
  color: var(--text-secondary);
  line-height: 1.8;
}

.bento-exp, .bento-projects {
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.bento-number {
  font-size: 3rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.bento-label {
  color: var(--text-muted);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.bento-passion {
  grid-column: span 2;
  text-align: center;
  font-style: italic;
  color: var(--text-secondary);
  font-size: 1.25rem;
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
}

.skill-card {
  background: var(--bg-secondary);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--border-radius);
  padding: 30px;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.skill-card:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(102, 126, 234, 0.15);
}

.skill-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.skill-icon svg {
  width: 24px;
  height: 24px;
  color: white;
}

.skill-card h4 {
  font-size: 1.25rem;
  margin-bottom: 15px;
}

.skill-bar {
  height: 6px;
  background: rgba(0, 0, 0, 0.08);
  border-radius: 10px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--gradient-1), var(--gradient-3));
  border-radius: 10px;
  transition: width 1s ease;
}

.skill-card.visible .skill-progress {
  width: var(--progress);
}

/* Contact Section */
.contact {
  background: var(--bg-secondary);
}

.contact-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  background: var(--bg-secondary);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--border-radius);
  padding: 40px 30px;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.contact-card:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(102, 126, 234, 0.15);
}

.contact-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-icon svg {
  width: 28px;
  height: 28px;
  color: white;
}

.contact-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact-value {
  color: var(--text-primary);
  font-weight: 500;
}

/* Footer */
.footer {
  padding: 40px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  background: var(--bg-secondary);
}

/* Responsive */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-image {
    max-width: 400px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .nav {
    padding: 15px 20px;
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    transform: rotate(-45deg) translate(1px, -1px);
  }

  .bento-grid {
    grid-template-columns: 1fr;
  }

  .bento-intro, .bento-passion {
    grid-column: span 1;
  }

  .bento-exp, .bento-projects {
    padding: 20px;
  }

  .bento-number {
    font-size: 2.5rem;
  }

  .scroll-indicator {
    bottom: 20px;
  }

  .cursor-glow {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 250px;
  }
}

/* Scroll Animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}