/* ========================================
   CSS DESIGN SYSTEM — DARK CYBER-TECH THEME
   ======================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors – Dark Mode (default) */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-tertiary: #1a1f35;
  --bg-card: rgba(17, 24, 39, 0.6);
  --bg-card-hover: rgba(25, 34, 56, 0.8);
  --bg-glass: rgba(15, 20, 40, 0.55);
  --bg-glass-border: rgba(100, 120, 255, 0.12);

  --text-primary: #e8ecf4;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-1: #6c63ff;       /* Primary Purple */
  --accent-2: #00d4ff;       /* Cyan */
  --accent-3: #a855f7;       /* Violet */
  --accent-4: #22d3ee;       /* Teal */
  --accent-gradient: linear-gradient(135deg, #6c63ff 0%, #00d4ff 50%, #a855f7 100%);
  --accent-gradient-soft: linear-gradient(135deg, rgba(108,99,255,0.15) 0%, rgba(0,212,255,0.10) 100%);
  --accent-glow: 0 0 20px rgba(108, 99, 255, 0.3), 0 0 60px rgba(0, 212, 255, 0.1);
  --accent-glow-strong: 0 0 30px rgba(108, 99, 255, 0.5), 0 0 80px rgba(0, 212, 255, 0.2);

  --border-color: rgba(100, 120, 255, 0.1);
  --border-glow: rgba(108, 99, 255, 0.3);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255,255,255,0.05);

  /* Typography */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --section-padding: 100px 0;
  --container-max: 1200px;
  --border-radius: 16px;
  --border-radius-sm: 10px;
  --border-radius-xs: 6px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Navbar */
  --nav-height: 72px;
}

/* ---------- Light Mode ---------- */
[data-theme="light"] {
  --bg-primary: #f0f2f8;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e8ecf4;
  --bg-card: rgba(255, 255, 255, 0.7);
  --bg-card-hover: rgba(255, 255, 255, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.6);
  --bg-glass-border: rgba(108, 99, 255, 0.15);

  --text-primary: #1a1f35;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --accent-glow: 0 0 20px rgba(108, 99, 255, 0.15), 0 0 60px rgba(0, 212, 255, 0.05);
  --accent-glow-strong: 0 0 30px rgba(108, 99, 255, 0.25), 0 0 80px rgba(0, 212, 255, 0.1);

  --border-color: rgba(108, 99, 255, 0.1);
  --border-glow: rgba(108, 99, 255, 0.2);

  --shadow-sm: 0 2px 8px rgba(108, 99, 255, 0.06);
  --shadow-md: 0 8px 32px rgba(108, 99, 255, 0.08);
  --shadow-lg: 0 16px 64px rgba(108, 99, 255, 0.1);
  --shadow-card: 0 8px 32px rgba(108, 99, 255, 0.08), inset 0 1px 0 rgba(255,255,255,0.8);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

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

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

ul {
  list-style: none;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Glass Card ---------- */
.glass-card {
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--border-radius);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--accent-glow);
  border-color: var(--border-glow);
}

/* ---------- Section Common ---------- */
.section {
  padding: var(--section-padding);
  position: relative;
}

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

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent-2);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 12px;
  padding: 6px 16px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.15);
  border-radius: 50px;
}

.section-title {
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
}

.section-line {
  width: 60px;
  height: 4px;
  background: var(--accent-gradient);
  border-radius: 2px;
  margin: 0 auto;
}

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  transition: background var(--transition-base), box-shadow var(--transition-base), backdrop-filter var(--transition-base);
}

.navbar.scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--bg-glass-border);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.logo-bracket {
  color: var(--accent-1);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  position: relative;
  padding: 8px 18px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: var(--accent-gradient-soft);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--accent-gradient);
  border-radius: 2px;
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-glass);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.05rem;
  transition: all var(--transition-base);
  margin-left: 8px;
}

.theme-toggle:hover {
  color: var(--accent-2);
  border-color: var(--accent-2);
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.2);
  transform: rotate(15deg);
}

/* Mobile Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

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

/* Animated Grid Background */
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(108, 99, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108, 99, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, black 40%, transparent 100%);
}

[data-theme="light"] .hero-grid-bg {
  background-image:
    linear-gradient(rgba(108, 99, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108, 99, 255, 0.08) 1px, transparent 1px);
}

/* Particle Canvas */
.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 40px 24px;
  width: 100%;
  position: relative;
  z-index: 2;
}

/* Hero Content */
.hero-content {
  flex: 1;
  max-width: 600px;
}

.hero-greeting {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent-2);
  margin-bottom: 12px;
  opacity: 0;
  animation: fadeInUp 0.8s 0.2s forwards;
}

.greeting-line {
  display: inline-block;
  width: 40px;
  height: 2px;
  background: var(--accent-gradient);
}

.hero-name {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 8px;
  min-height: 1.2em;
  opacity: 0;
  animation: fadeInUp 0.8s 0.4s forwards;
}

.name-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.cursor-blink {
  display: inline-block;
  color: var(--accent-2);
  animation: blink 0.7s step-end infinite;
  font-weight: 300;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero-title-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeInUp 0.8s 0.6s forwards;
}

.hero-title-label {
  color: var(--text-secondary);
  font-weight: 400;
}

.hero-title {
  color: var(--accent-2);
  font-weight: 600;
  font-family: var(--font-mono);
  border-right: 2px solid var(--accent-2);
  padding-right: 4px;
  animation: blink-caret 0.75s step-end infinite;
}

@keyframes blink-caret {
  50% { border-color: transparent; }
}

.hero-slogan {
  font-size: 1.05rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 32px;
  opacity: 0;
  animation: fadeInUp 0.8s 0.8s forwards;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.8s 1s forwards;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  border: none;
  cursor: pointer;
  font-family: var(--font-main);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 8px 30px rgba(108, 99, 255, 0.5);
  transform: translateY(-2px);
}

.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn-primary:hover::after {
  opacity: 1;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-glow);
}

.btn-outline:hover {
  background: var(--accent-gradient-soft);
  border-color: var(--accent-1);
  transform: translateY(-2px);
  box-shadow: var(--accent-glow);
}

/* Social Links */
.hero-socials {
  display: flex;
  gap: 14px;
  opacity: 0;
  animation: fadeInUp 0.8s 1.2s forwards;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-glass);
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: all var(--transition-base);
}

.social-link:hover {
  color: #fff;
  border-color: transparent;
  transform: translateY(-4px) scale(1.05);
}

.social-link:nth-child(1):hover { background: #1877f2; box-shadow: 0 8px 25px rgba(24,119,242,0.35); }
.social-link:nth-child(2):hover { background: linear-gradient(135deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888); box-shadow: 0 8px 25px rgba(225,48,108,0.35); }
.social-link:nth-child(3):hover { background: #0a66c2; box-shadow: 0 8px 25px rgba(10,102,194,0.35); }
.social-link:nth-child(4):hover { background: #333; box-shadow: 0 8px 25px rgba(51,51,51,0.35); }
.social-link:nth-child(5):hover { background: var(--accent-1); box-shadow: 0 8px 25px rgba(108,99,255,0.35); }

[data-theme="light"] .social-link:nth-child(4):hover { background: #24292e; }

/* Hero Image */
.hero-image-wrapper {
  position: relative;
  flex-shrink: 0;
  opacity: 0;
  animation: fadeInScale 1s 0.5s forwards;
}

.hero-avatar-ring {
  position: relative;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-avatar-ring::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: var(--accent-gradient);
  padding: 4px;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: destination-out;
  animation: spin 8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.hero-avatar-glow {
  position: absolute;
  inset: -20px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(108, 99, 255, 0.2) 0%, transparent 70%);
  animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

.hero-avatar {
  width: 310px;
  height: 310px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.hero-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

/* Floating Badges */
.hero-floating-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  backdrop-filter: blur(12px);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  z-index: 3;
  white-space: nowrap;
}

.hero-floating-badge i {
  color: var(--accent-2);
}

.badge-1 {
  top: 30px;
  right: -20px;
  animation: float-badge 4s ease-in-out infinite;
}

.badge-2 {
  bottom: 60px;
  left: -30px;
  animation: float-badge 4s ease-in-out 1.3s infinite;
}

.badge-3 {
  bottom: 10px;
  right: -10px;
  animation: float-badge 4s ease-in-out 2.6s infinite;
}

@keyframes float-badge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Scroll Indicator */
.hero-scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeIn 1s 2s forwards;
}

.scroll-arrow {
  animation: bounce-arrow 1.5s ease-in-out infinite;
}

@keyframes bounce-arrow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-image-card {
  text-align: center;
}

.about-image-frame {
  width: 280px;
  height: 280px;
  margin: 0 auto 30px;
  border-radius: var(--border-radius);
  overflow: hidden;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  padding: 20px;
  box-shadow: var(--shadow-md);
  position: relative;
}

.about-image-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-gradient);
  opacity: 0.05;
  transition: opacity var(--transition-base);
}

.about-image-frame:hover::before {
  opacity: 0.1;
}

.about-image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--border-radius-sm);
}

.about-stats {
  display: flex;
  justify-content: center;
  gap: 30px;
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-number::after {
  content: '+';
  -webkit-text-fill-color: var(--accent-2);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.about-text-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about-card {
  padding: 24px 28px;
}

.about-card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.about-card-title i {
  color: var(--accent-1);
  font-size: 1rem;
}

.about-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ========================================
   SKILLS SECTION
   ======================================== */
.skills {
  background: var(--bg-secondary);
}

[data-theme="light"] .skills {
  background: #f8f9ff;
}

.skills-categories {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.skill-category {
  padding: 32px 28px;
  text-align: center;
}

.skill-category-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  background: var(--accent-gradient-soft);
  border: 1px solid var(--bg-glass-border);
  font-size: 1.6rem;
  color: var(--accent-2);
}

.skill-category-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 22px;
  color: var(--text-primary);
}

.skill-badges {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.skill-badge {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--border-radius-sm);
  background: rgba(108, 99, 255, 0.04);
  border: 1px solid rgba(108, 99, 255, 0.06);
  transition: all var(--transition-base);
}

.skill-badge:hover {
  background: rgba(108, 99, 255, 0.08);
  border-color: rgba(108, 99, 255, 0.15);
  transform: translateX(4px);
}

.skill-badge i {
  font-size: 1.1rem;
  color: var(--accent-1);
}

.skill-badge span {
  text-align: left;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.skill-level {
  width: 80px;
  height: 6px;
  background: rgba(108, 99, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.skill-level::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0;
  background: var(--accent-gradient);
  border-radius: 3px;
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-level.animate::after {
  width: var(--level);
}

/* ========================================
   PROJECTS SECTION
   ======================================== */
.projects-filter {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 10px 24px;
  font-size: 0.88rem;
  font-weight: 600;
  font-family: var(--font-main);
  color: var(--text-secondary);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition-base);
}

.filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-1);
}

.filter-btn.active {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(108, 99, 255, 0.3);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.project-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
}

.project-card.hidden {
  display: none;
}

.project-image {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: var(--bg-tertiary);
}

.project-image-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: var(--accent-gradient-soft);
  font-size: 3rem;
  color: var(--accent-1);
  transition: transform var(--transition-slow);
}

.project-card:hover .project-image-placeholder {
  transform: scale(1.1);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 14, 26, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

[data-theme="light"] .project-overlay {
  background: rgba(26, 31, 53, 0.7);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-links {
  display: flex;
  gap: 16px;
}

.project-link-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-gradient);
  color: #fff;
  font-size: 1.1rem;
  transform: translateY(20px);
  opacity: 0;
  transition: all var(--transition-base);
}

.project-card:hover .project-link-btn {
  transform: translateY(0);
  opacity: 1;
}

.project-card:hover .project-link-btn:nth-child(2) {
  transition-delay: 0.08s;
}

.project-link-btn:hover {
  box-shadow: var(--accent-glow-strong);
  transform: scale(1.1) !important;
}

.project-info {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.project-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.project-tech span {
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--accent-2);
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.15);
  border-radius: 50px;
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact {
  background: var(--bg-secondary);
}

[data-theme="light"] .contact {
  background: #f8f9ff;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 40px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-info-card {
  padding: 22px 24px;
  display: flex;
  align-items: center;
  gap: 18px;
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--accent-gradient-soft);
  color: var(--accent-1);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-info-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.contact-info-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.contact-socials {
  padding-top: 10px;
}

.contact-socials h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.contact-social-links {
  display: flex;
  gap: 12px;
}

.contact-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-glass);
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: all var(--transition-base);
}

.contact-social-link:hover {
  color: #fff;
  border-color: transparent;
  transform: translateY(-4px);
}

.contact-social-link:nth-child(1):hover { background: #1877f2; box-shadow: 0 6px 20px rgba(24,119,242,0.3); }
.contact-social-link:nth-child(2):hover { background: linear-gradient(135deg, #f09433, #e6683c, #dc2743); box-shadow: 0 6px 20px rgba(225,48,108,0.3); }
.contact-social-link:nth-child(3):hover { background: #0a66c2; box-shadow: 0 6px 20px rgba(10,102,194,0.3); }
.contact-social-link:nth-child(4):hover { background: #333; box-shadow: 0 6px 20px rgba(51,51,51,0.3); }
.contact-social-link:nth-child(5):hover { background: var(--accent-1); box-shadow: 0 6px 20px rgba(108,99,255,0.3); }

/* Contact Form */
.contact-form {
  padding: 36px;
}

.form-group {
  margin-bottom: 22px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper i {
  position: absolute;
  left: 16px;
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  z-index: 1;
}

.input-wrapper input,
.input-wrapper textarea {
  width: 100%;
  padding: 14px 16px 14px 46px;
  font-size: 0.92rem;
  font-family: var(--font-main);
  color: var(--text-primary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  outline: none;
  transition: all var(--transition-base);
}

.input-wrapper input::placeholder,
.input-wrapper textarea::placeholder {
  color: var(--text-muted);
}

.input-wrapper input:focus,
.input-wrapper textarea:focus {
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.1);
}

.input-wrapper input:focus + i,
.input-wrapper:focus-within i {
  color: var(--accent-1);
}

.textarea-wrapper {
  align-items: flex-start;
}

.textarea-wrapper i {
  top: 16px;
}

.textarea-wrapper textarea {
  resize: vertical;
  min-height: 120px;
}

.btn-submit {
  width: 100%;
  justify-content: center;
  padding: 16px;
  font-size: 1rem;
}

.form-status {
  margin-top: 14px;
  text-align: center;
  font-size: 0.88rem;
  font-weight: 500;
  min-height: 20px;
}

.form-status.success {
  color: #22c55e;
}

.form-status.error {
  color: #ef4444;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  padding: 50px 0 30px;
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
}

.footer-content {
  text-align: center;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  display: inline-block;
  margin-bottom: 12px;
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 400px;
  margin: 0 auto 20px;
}

.footer-socials {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-bottom: 24px;
}

.footer-socials a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: all var(--transition-base);
}

.footer-socials a:hover {
  color: var(--accent-2);
  border-color: var(--accent-2);
  transform: translateY(-3px);
}

.footer-divider {
  width: 80px;
  height: 1px;
  background: var(--border-color);
  margin: 0 auto 18px;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* ========================================
   BACK TO TOP
   ======================================== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.3);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  box-shadow: var(--accent-glow-strong);
  transform: translateY(-4px);
}

/* ========================================
   ANIMATIONS (Scroll-reveal)
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.85);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.active {
  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: 1024px) {
  .hero-container {
    flex-direction: column;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .hero-greeting {
    justify-content: center;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-socials {
    justify-content: center;
  }

  .hero-avatar-ring {
    width: 280px;
    height: 280px;
  }

  .hero-avatar {
    width: 254px;
    height: 254px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-image-col {
    order: -1;
  }

  .skills-categories {
    grid-template-columns: 1fr 1fr;
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  :root {
    --section-padding: 70px 0;
    --nav-height: 64px;
  }

  /* Mobile Nav */
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 30px 30px;
    gap: 4px;
    transition: right var(--transition-base);
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.3);
    z-index: 999;
  }

  .nav-menu.open {
    right: 0;
  }

  .nav-link {
    width: 100%;
    padding: 14px 18px;
    font-size: 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .skills-categories {
    grid-template-columns: 1fr;
  }

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

  .hero-name {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .hero-avatar-ring {
    width: 220px;
    height: 220px;
  }

  .hero-avatar {
    width: 200px;
    height: 200px;
  }

  .hero-floating-badge {
    font-size: 0.7rem;
    padding: 8px 14px;
  }

  .badge-1 { right: -10px; top: 10px; }
  .badge-2 { left: -15px; }
  .badge-3 { right: 0; }

  .about-stats {
    gap: 20px;
  }

  .stat-number {
    font-size: 1.6rem;
  }

  .contact-form {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    justify-content: center;
    width: 100%;
  }

  .about-image-frame {
    width: 200px;
    height: 200px;
  }

  .about-stats {
    flex-wrap: wrap;
  }

  .projects-filter {
    gap: 8px;
  }

  .filter-btn {
    padding: 8px 16px;
    font-size: 0.82rem;
  }
}

/* ========================================
   MOBILE NAV OVERLAY
   ======================================== */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}