:root {
  --primary: #6c5ce7;
  --primary-dark: #4a3db8;
  --primary-light: #a29bfe;
  --accent: #00d2ff;
  --bg: #0f0f1a;
  --bg-light: #1a1a2e;
  --bg-card: rgba(26, 26, 46, 0.8);
  --text: #ffffff;
  --text-muted: #b0b0c0;
  --border: #2d2d44;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  --radius: 12px;
  --transition: 0.3s ease;
  --font-family: 'Segoe UI', Tahoma, sans-serif;
}

[data-theme="light"] {
  --primary: #6c5ce7;
  --primary-dark: #4a3db8;
  --primary-light: #a29bfe;
  --accent: #00b4d8;
  --bg: #f5f5fa;
  --bg-light: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.9);
  --text: #1a1a2e;
  --text-muted: #555570;
  --border: #e0e0e8;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

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

html {
  scroll-behavior: smooth;
}

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

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

/* Header */
.site-header {
  background: rgba(15, 15, 26, 0.95);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

[data-theme="light"] .site-header {
  background: rgba(255, 255, 255, 0.95);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}

.logo:hover {
  color: var(--primary-light);
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  align-items: center;
}

.main-nav a {
  color: var(--text);
  text-decoration: none;
  transition: color var(--transition);
  font-weight: 500;
}

.main-nav a:hover,
.main-nav a:focus {
  color: var(--primary);
  outline: none;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text);
  transition: all var(--transition);
}

.theme-toggle:hover,
.theme-toggle:focus {
  border-color: var(--primary);
  color: var(--primary);
  outline: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.8rem;
  cursor: pointer;
}

/* Hero */
.hero {
  padding: 6rem 0;
  text-align: center;
  background: linear-gradient(135deg, var(--bg) 0%, var(--bg-light) 100%);
  transition: background var(--transition);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(108, 92, 231, 0.1) 0%, transparent 70%);
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: bold;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(108, 92, 231, 0.3);
  outline: none;
}

/* Sections */
.services,
.about,
.skills,
.projects,
.contact {
  padding: 4rem 0;
}

.services h2,
.about h2,
.skills h2,
.projects h2,
.contact h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 2rem;
  color: var(--text);
}

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

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  backdrop-filter: blur(5px);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.card h3 {
  color: var(--primary);
  margin-bottom: 1rem;
}

.card p {
  color: var(--text-muted);
}

/* Skills */
.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.skill-tag {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 0.5rem 1.5rem;
  color: var(--text);
  transition: all var(--transition);
}

.skill-tag:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* Projects */
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.project-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.project-card .project-info {
  padding: 1.5rem;
}

.project-card h3 {
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.project-card p {
  color: var(--text-muted);
}

/* Contact form */
.contact {
  background: var(--bg-light);
  transition: background var(--transition);
}

.contact form {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact input,
.contact textarea {
  padding: 0.8rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}

.contact input:focus,
.contact textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.2);
}

#form-message {
  text-align: center;
  margin-top: 1rem;
  font-weight: bold;
}

/* Footer */
.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
  color: var(--text-muted);
  transition: background var(--transition), border-color var(--transition);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.social-links a {
  color: var(--text-muted);
  transition: color var(--transition);
}

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

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

.animate {
  animation: fadeInUp 0.6s ease forwards;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  .main-nav {
    display: none;
    width: 100%;
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
  }
  .main-nav.active {
    display: block;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
  }
  .main-nav li {
    text-align: center;
    padding: 1rem;
    border-top: 1px solid var(--border);
  }
  .hero h1 {
    font-size: 2rem;
  }
}