:root {
  /* Colors */
  --bg-color: #f0f2f5;
  --text-color: #1a1a1a;
  --card-bg: rgba(255, 255, 255, 0.7);
  --primary-color: #4f46e5;
  --highlight-color: #6366f1;
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
  --nav-bg: rgba(255, 255, 255, 0.8);
}

.dark-mode {
  --bg-color: #050505;
  --text-color: #e2e8f0;
  --card-bg: rgba(20, 20, 25, 0.6);
  --primary-color: #818cf8;
  --highlight-color: #a5b4fc;
  --glass-border: rgba(255, 255, 255, 0.05);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
  --nav-bg: rgba(10, 10, 15, 0.8);
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  overflow-x: hidden;
  transition: background-color 0.8s cubic-bezier(0.25, 0.8, 0.25, 1), color 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Loading Screen */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--bg-color);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  transition: opacity 1s ease;
}

.loader {
  width: 200px;
  height: 4px;
  background: var(--glass-border);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 20px;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--primary-color);
  transition: width 0.1s ease;
}

/* 3D Background */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
}

/* App Container */
#app {
  position: relative;
  z-index: 1;
  pointer-events: none; /* Let clicks pass through except on interactive elements */
}

/* Interactive Elements */
header, .card, .btn, .btn-link, .project-card {
  pointer-events: auto;
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 20px 50px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 100;
  transition: all 0.3s ease;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 1px;
}

.highlight {
  color: var(--highlight-color);
}

nav {
  display: flex;
  gap: 30px;
}

nav a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
  transition: color 0.3s ease;
}

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

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

nav a:hover::after {
  width: 100%;
}

.theme-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-color);
}

/* Sections */
main {
  padding-top: 100px; /* offset for fixed header */
}

.section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 50px 20px;
  perspective: 1000px;
}

/* Glassmorphism Cards */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 50px;
  max-width: 800px;
  width: 100%;
  box-shadow: var(--glass-shadow);
  transform-style: preserve-3d;
  transition: transform 0.2s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.card:hover {
  box-shadow: 0 15px 40px 0 rgba(0, 0, 0, 0.2);
}

/* Text styles */
h1 {
  font-size: 4rem;
  margin-bottom: 20px;
  line-height: 1.1;
  transform: translateZ(30px);
  background: linear-gradient(45deg, var(--text-color), var(--primary-color));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: 30px;
  color: var(--primary-color);
  transform: translateZ(20px);
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

p {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 30px;
  opacity: 0.9;
  transform: translateZ(10px);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 30px;
  background: var(--primary-color);
  color: #fff;
  text-decoration: none;
  border-radius: 30px;
  font-weight: 600;
  transition: background-color 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), color 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  transform: translateZ(20px);
  box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}

.btn:hover {
  background: var(--highlight-color);
  transform: translateZ(25px) scale(1.05);
  box-shadow: 0 8px 25px rgba(79, 70, 229, 0.6);
}

.social-links {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.fb-btn {
  background: #1877f2;
  box-shadow: 0 4px 15px rgba(24, 119, 242, 0.4);
}

.fb-btn:hover {
  background: #166fe5;
  box-shadow: 0 8px 25px rgba(24, 119, 242, 0.6);
}

.tg-btn {
  background: #0088cc;
  box-shadow: 0 4px 15px rgba(0, 136, 204, 0.4);
}

.tg-btn:hover {
  background: #0077b3;
  box-shadow: 0 8px 25px rgba(0, 136, 204, 0.6);
}

.email-btn {
  background: #ea4335;
  box-shadow: 0 4px 15px rgba(234, 67, 53, 0.4);
}

.email-btn:hover {
  background: #c5221f;
  box-shadow: 0 8px 25px rgba(234, 67, 53, 0.6);
}

.li-btn {
  background: #0a66c2;
  box-shadow: 0 4px 15px rgba(10, 102, 194, 0.4);
}

.li-btn:hover {
  background: #004182;
  box-shadow: 0 8px 25px rgba(10, 102, 194, 0.6);
}

.ig-btn {
  background: #E1306C;
  box-shadow: 0 4px 15px rgba(225, 48, 108, 0.4);
}

.ig-btn:hover {
  background: #C13584;
  box-shadow: 0 8px 25px rgba(225, 48, 108, 0.6);
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 20px;
  transform: translateZ(15px);
}

.skill-item {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-color);
  padding: 15px;
  border-radius: 10px;
  text-align: center;
  font-weight: 700;
  border: 1px solid var(--glass-border);
  transition: background-color 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), color 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.dark-mode .skill-item {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.skill-item:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-5px);
}

/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 40px;
  max-width: 1000px;
  width: 100%;
}

.project-card {
  background: var(--card-bg);
  border-radius: 20px;
  overflow: hidden;
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  transform-style: preserve-3d;
}

.project-img {
  height: 200px;
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--glass-border);
}

.bg-phonedetector {
  background-image: linear-gradient(135deg, #ff9a9e 0%, #fecfef 99%, #fecfef 100%);
}

.bg-edumaster {
  background-image: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.bg-translator {
  background-image: linear-gradient(120deg, #84fab0 0%, #8fd3f4 100%);
}

.bg-soanbooth {
  background-image: linear-gradient(to top, #a18cd1 0%, #fbc2eb 100%);
}

.project-info {
  padding: 30px;
}

.project-info h3 {
  font-size: 1.5rem;
  margin-bottom: 10px;
  color: var(--primary-color);
}

.project-links {
  display: flex;
  gap: 15px;
  margin-top: 20px;
}

.btn-link {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 600;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--primary-color);
  padding-bottom: 2px;
  transition: color 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.btn-link:hover {
  color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
  header {
    padding: 15px 20px;
    flex-direction: column;
    gap: 15px;
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  .card {
    padding: 30px;
  }
}