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

/* ==========================================================================
   CSS Variables
   ========================================================================== */
:root {
  /* Colors - Light Theme */
  --primary-color: #4f46e5;
  --primary-light: #818cf8;
  --primary-dark: #3730a3;
  --accent-color: #ec4899;
  --accent-light: #f472b6;
  
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  
  /* Glassmorphism */
  --card-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
  --nav-bg: rgba(255, 255, 255, 0.8);
  
  /* Typography */
  --font-main: 'Inter', sans-serif;
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Radii */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
}

[data-theme="dark"] {
  /* Colors - Dark Theme */
  --primary-color: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4338ca;
  --accent-color: #f472b6;
  --accent-light: #fbcfe8;
  
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border-color: #334155;
  
  /* Glassmorphism */
  --card-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.05);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  --nav-bg: rgba(15, 23, 42, 0.8);
}

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

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

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

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

ul {
  list-style: none;
}

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

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 6rem 0;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--text-primary);
}

h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  text-align: center;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 4rem;
  font-size: 1.1rem;
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.gradient-text {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  display: inline-block;
}

.glass-card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  font-weight: 600;
  transition: all var(--transition-fast);
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: white;
  box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  background: var(--border-color);
}

/* ==========================================================================
   1. Preloader
   ========================================================================== */
.preloader {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.preloader.loaded {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

.preloader-inner {
  position: relative;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preloader-spinner {
  position: absolute;
  inset: 0;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.preloader span {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--primary-color);
  z-index: 1;
}

/* ==========================================================================
   2. Scroll Progress Bar
   ========================================================================== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  z-index: 1001;
  width: 0%;
  transition: width 0.1s ease-out;
}

/* ==========================================================================
   3. Controls (Theme & Lang Switcher)
   ========================================================================== */
.controls-wrapper {
  position: relative;
  display: flex;
  gap: 1rem;
  z-index: 1000;
}

.language-switcher, .theme-switcher {
  display: flex;
  align-items: center;
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: 9999px;
  padding: 0.25rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.lang-btn, .theme-btn {
  padding: 0.5rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.lang-btn.active, .theme-btn.active {
  background: var(--primary-color);
  color: white;
}

.theme-btn {
  padding: 0.5rem;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   4. Navbar
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem 0;
  z-index: 999;
  background: transparent;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 1rem 0;
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.nav-menu {
  display: flex;
  gap: 2rem;
  margin-left: auto;
  margin-right: 2.5rem;
}

.nav-menu a {
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  transition: color var(--transition-fast);
  padding: 0.5rem 0;
}

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

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width var(--transition-normal);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

.nav-menu a.active {
  color: var(--primary-color);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  z-index: 1000;
}

.hamburger span {
  display: block;
  width: 28px;
  height: 2px;
  background-color: var(--text-primary);
  transition: all var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ==========================================================================
   5. Hero Section
   ========================================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 6rem;
}

.hero::before, .hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  z-index: -1;
  opacity: 0.4;
  animation: float 10s infinite ease-in-out alternate;
}

.hero::before {
  top: 10%;
  left: -10%;
  width: 40vw;
  height: 40vw;
  background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
}

.hero::after {
  bottom: -10%;
  right: -10%;
  width: 30vw;
  height: 30vw;
  background: radial-gradient(circle, var(--accent-light) 0%, transparent 70%);
  animation-delay: -5s;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

.hero-text h1 {
  font-size: 4rem;
  margin-bottom: 1rem;
  letter-spacing: -1px;
}

.hero-text .typed-role {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  min-height: 2.2rem;
}

.typed-cursor {
  font-weight: 400;
  color: var(--primary-color);
  animation: blink 0.7s infinite;
  margin-left: 2px;
}

.hero-text p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 500px;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
}

.profile-card {
  position: relative;
  padding: 2.5rem 2rem;
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--glass-shadow);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.profile-card:hover {
  transform: translateY(-10px);
}

.profile-avatar {
  width: 240px;
  height: 240px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 1.5rem;
  border: 4px solid var(--border-color);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.profile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.profile-card:hover .profile-photo {
  transform: scale(1.05);
}

.profile-info {
  text-align: center;
}

.profile-info h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.profile-info p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

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

.about-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-text p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.stat {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  text-align: center;
  transition: all var(--transition-normal);
}

.stat:hover {
  border-color: var(--primary-color);
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

.stat h3, .stat .counter {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat p {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ==========================================================================
   7. Skills Section
   ========================================================================== */
.skills {
  background-color: var(--bg-primary);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.skill-category {
  padding: 2rem;
}

.skill-category h3 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
}

.skill-category h3::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 24px;
  background: var(--primary-color);
  margin-right: 12px;
  border-radius: 4px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.skill-tag {
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.skill-tag:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  transform: translateY(-2px);
}

.skill-bar-container {
  margin-bottom: 1rem;
}

.skill-bar-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.skill-bar {
  height: 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: 4px;
  width: 0;
  transition: width 1.5s cubic-bezier(0.1, 0.5, 0.2, 1);
}

/* ==========================================================================
   8. Projects Section (Custom CSS replacing Tailwind)
   ========================================================================== */
.projects {
  background-color: var(--bg-primary); /* Alternates with skills, can use bg-secondary depending on flow */
}

.project-showcase {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  position: relative;
  margin-top: 3rem;
  transition: transform var(--transition-normal);
}

.project-showcase:hover {
  transform: translateY(-5px);
}

.project-hero-inner {
  padding: 5rem 2rem;
  text-align: center;
  position: relative;
  z-index: 1;
}

.project-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: rgba(79, 70, 229, 0.1);
  color: var(--primary-color);
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  border: 1px solid rgba(79, 70, 229, 0.2);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.project-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.project-description {
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 3rem;
  font-size: 1.125rem;
  line-height: 1.6;
}

.project-video-wrapper {
  max-width: 900px;
  margin: 0 auto;
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.video-browser-bar {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  gap: 0.5rem;
}

.video-browser-bar .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot.red { background-color: #ef4444; }
.dot.yellow { background-color: #f59e0b; }
.dot.green { background-color: #10b981; }

.browser-url {
  flex: 1;
  text-align: center;
  font-family: monospace;
  font-size: 0.875rem;
  color: var(--text-muted);
  background: var(--bg-primary);
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  margin: 0 1rem;
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

a.browser-url:hover {
  color: var(--primary-color);
  background: rgba(79, 70, 229, 0.08);
}

.video-container {
  position: relative;
  aspect-ratio: 16 / 9;
  width: 100%;
  background: #000;
}

.video-container video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  max-width: 800px;
  margin: 3rem auto 0;
}

.tech-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-tertiary);
  padding: 1rem;
  border-radius: var(--radius-xl);
  transition: transform var(--transition-fast);
  border: 1px solid transparent;
}

.tech-item:hover {
  transform: translateY(-3px);
  border-color: var(--border-color);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.tech-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  color: white;
}
.tech-icon.react { background-color: #3b82f6; }
.tech-icon.node { background-color: #10b981; }
.tech-icon.ai { background-color: #8b5cf6; }
.tech-icon.tailwind { background-color: #06b6d4; }

.tech-info {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.tech-info strong {
  color: var(--text-primary);
  font-size: 0.9rem;
}

.tech-info span {
  color: var(--text-secondary);
  font-size: 0.75rem;
}

.project-blobs {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.15;
}

.blob-1 {
  width: 300px;
  height: 300px;
  background-color: #3b82f6;
  top: 50px;
  left: 30px;
  animation: blob 8s infinite;
}

.blob-2 {
  width: 300px;
  height: 300px;
  background-color: #8b5cf6;
  top: 50px;
  right: 30px;
  animation: blob 8s infinite 2s;
}

.blob-3 {
  width: 300px;
  height: 300px;
  background-color: #ec4899;
  bottom: -50px;
  left: 50%;
  transform: translateX(-50%);
  animation: blob 8s infinite 4s;
}

/* ==========================================================================
   9. Experience & Education
   ========================================================================== */
.experience, .education {
  background-color: var(--bg-secondary);
}

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

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  width: 50%;
  padding-right: 3rem;
}

.timeline-item:nth-child(even) {
  margin-left: auto;
  padding-right: 0;
  padding-left: 3rem;
}

.timeline-dot {
  position: absolute;
  top: 0;
  right: -11px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-color);
  border: 4px solid var(--bg-secondary);
}

.timeline-item:nth-child(even) .timeline-dot {
  left: -9px;
}

.timeline-content {
  padding: 1.5rem;
  border-radius: var(--radius-lg);
}

.timeline-date {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(79, 70, 229, 0.1);
  color: var(--primary-color);
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.timeline-content h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.timeline-content h4 {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 1rem;
}

.timeline-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.education-item {
  padding: 2rem;
  border-radius: var(--radius-lg);
  border-top: 4px solid var(--primary-color);
}

.education-item h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.education-item .institution {
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 1rem;
}

.education-item .year {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 1rem;
}

.education-item p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ==========================================================================
   10. Certificates
   ========================================================================== */
.certificates {
  background-color: var(--bg-primary);
}

.certificates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.certificate-item {
  padding: 2rem;
  text-align: center;
}

.cert-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.5rem;
  background: rgba(79, 70, 229, 0.1);
  color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.certificate-item h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.certificate-item p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.cert-link {
  font-size: 0.875rem;
  color: var(--primary-color);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.cert-link:hover {
  text-decoration: underline;
}

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

.contact-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.contact-item {
  padding: 2.5rem 2rem;
  text-align: center;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  transition: all var(--transition-normal);
}

.contact-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.contact-item.copyable {
  cursor: pointer;
}

.contact-item.copyable:hover {
  border-color: var(--primary-color);
}

.contact-icon,
.contact-item > i {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.5rem;
  background: rgba(79, 70, 229, 0.1);
  color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  transition: transform var(--transition-fast);
}

.contact-item:hover .contact-icon,
.contact-item:hover > i {
  transform: scale(1.1);
}

/* Protected contact items & obfuscation */
.contact-item.protected {
  position: relative;
  overflow: hidden;
}

.reveal-badge {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  background: rgba(79, 70, 229, 0.08);
  color: var(--primary-color);
  border: 1px solid rgba(79, 70, 229, 0.15);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.contact-item.protected:hover .reveal-badge {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
}

.masked-value {
  letter-spacing: 0.05em;
  filter: blur(1.5px);
  opacity: 0.7;
  transition: filter var(--transition-fast), opacity var(--transition-fast);
}

.contact-item.protected:hover .masked-value {
  filter: blur(0.5px);
  opacity: 0.9;
}

.contact-item h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.contact-item p {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* ==========================================================================
   12. Footer
   ========================================================================== */
.footer {
  background-color: var(--bg-tertiary);
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-content {
  margin-bottom: 2rem;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  transform: translateY(-3px);
}

.footer-bottom {
  color: var(--text-muted);
  font-size: 0.875rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

/* ==========================================================================
   13. Back-to-Top Button
   ========================================================================== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: white;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
  opacity: 0;
  visibility: hidden;
  z-index: 990;
  transition: all var(--transition-normal);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: scale(1.1) translateY(-5px);
  box-shadow: 0 8px 25px rgba(79, 70, 229, 0.5);
}

/* ==========================================================================
   14. Toast Notifications
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  background-color: rgba(0, 0, 0, 0.85);
  color: white;
  padding: 12px 24px;
  border-radius: 9999px;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

[data-theme="dark"] .toast {
  background-color: rgba(255, 255, 255, 0.9);
  color: #000;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   15. Animations & Keyframes
   ========================================================================== */
@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes float {
  0% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(2%, 2%) rotate(5deg); }
  100% { transform: translate(-2%, -2%) rotate(-5deg); }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

@keyframes blob {
  0% { transform: translate(0px, 0px) scale(1); }
  33% { transform: translate(30px, -50px) scale(1.1); }
  66% { transform: translate(-20px, 20px) scale(0.9); }
  100% { transform: translate(0px, 0px) scale(1); }
}

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

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

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

/* ==========================================================================
   16. Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .nav-menu {
    gap: 1.25rem;
    margin-right: 1.5rem;
  }
  .hero-text h1 {
    font-size: 3.5rem;
  }
  .project-title {
    font-size: 3rem;
  }
}

@media (max-width: 968px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-text p {
    margin: 0 auto 2.5rem;
  }
  .hero-buttons {
    justify-content: center;
  }
  .hero-text .typed-role {
    justify-content: center;
  }
  .profile-card {
    max-width: 400px;
    margin: 0 auto;
  }
  
  .about-content {
    grid-template-columns: 1fr;
  }
  .about-text {
    text-align: center;
  }
  
  .project-tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .timeline::before {
    left: 0;
  }
  .timeline-item {
    width: 100%;
    padding-left: 3rem;
    padding-right: 0;
  }
  .timeline-item:nth-child(even) {
    padding-left: 3rem;
  }
  .timeline-dot {
    left: -11px !important;
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 1rem 0;
  }
  
  .hamburger {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    transition: left var(--transition-normal);
    margin: 0;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-menu a {
    font-size: 1.25rem;
  }
  
  .hero-text h1 {
    font-size: 2.5rem;
  }
  
  .project-title {
    font-size: 2.5rem;
  }
  
  .project-hero-inner {
    padding: 3rem 1.5rem;
  }
  
  .controls-wrapper {
    position: fixed;
    top: auto;
    bottom: 1.5rem;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
  }
  
  .back-to-top {
    bottom: 80px;
  }
}

@media (max-width: 480px) {
  h2 {
    font-size: 2rem;
  }
  
  .hero-text h1 {
    font-size: 2rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
  }
  
  .project-tech-grid {
    grid-template-columns: 1fr;
  }
  
  .about-stats {
    grid-template-columns: 1fr;
  }
  
  .timeline-item {
    padding-left: 2rem;
  }
}