@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;500;700;900&display=swap');

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

body { 
  font-family: 'Vazirmatn', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 
  overflow-x: hidden; 
  transition: background-color 0.5s, color 0.5s; 
  position: relative;
  width: 100%;
  padding-top: 40px;
}

.dark body { font-family: 'Vazirmatn', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; }

.gradient-text { 
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); 
  -webkit-background-clip: text; 
  -webkit-text-fill-color: transparent; 
  background-clip: text; 
}

.parallax-bg { 
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); 
  position: relative; 
  min-height: 100vh; 
  display: flex; 
  align-items: center; 
  overflow: hidden;
}

.parallax-bg::before { 
  content: ''; 
  position: absolute; 
  top: 0; left: 0; right: 0; bottom: 0; 
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="1" fill="white" opacity="0.1"/><circle cx="80" cy="40" r="1.5" fill="white" opacity="0.1"/><circle cx="40" cy="80" r="1" fill="white" opacity="0.1"/></svg>'); 
  background-size: 100px 100px; 
  animation: float 20s infinite linear; 
}

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

.card-hover { transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
.card-hover:hover { transform: translateY(-10px) scale(1.02); }

.skill-progress { position: relative; overflow: hidden; }
.skill-progress::after { 
  content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; 
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent); 
  animation: shimmer 2s infinite; 
}

@keyframes shimmer { 
  0% { transform: translateX(-100%); } 
  100% { transform: translateX(100%); } 
}

.scroll-reveal { 
  opacity: 0; transform: translateY(30px); 
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1); 
}
.scroll-reveal.revealed { opacity: 1; transform: translateY(0); }

.floating { animation: floating 3s ease-in-out infinite; }
@keyframes floating { 
  0% { transform: translateY(0px); } 
  50% { transform: translateY(-15px); } 
  100% { transform: translateY(0px); } 
}

.theme-toggle-wrapper { 
  position: relative; width: 64px; height: 32px; 
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); 
  border-radius: 16px; cursor: pointer; 
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1); overflow: hidden; 
}
.theme-toggle-wrapper.dark { background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%); }

.theme-toggle-slider { 
  position: absolute; top: 4px; left: 4px; width: 24px; height: 24px; 
  background: white; border-radius: 50%; 
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1); 
  display: flex; align-items: center; justify-content: center; 
  font-size: 14px; box-shadow: 0 2px 8px rgba(0,0,0,0.2); 
}
.theme-toggle-wrapper.dark .theme-toggle-slider { transform: translateX(32px); }

.sun-icon { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); font-size: 16px; transition: opacity 0.3s; }
.moon-icon { position: absolute; left: 8px; top: 50%; transform: translateY(-50%); font-size: 16px; transition: opacity 0.3s; opacity: 0; }
.theme-toggle-wrapper.dark .sun-icon { opacity: 0; }
.theme-toggle-wrapper.dark .moon-icon { opacity: 1; }

.footer-btn {
  position: relative; display: inline-block; width: 48px; height: 48px;
  border-radius: 50%; background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.2);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); overflow: hidden;
}
.footer-btn:hover {
  transform: translateY(-5px) scale(1.1);
  background: rgba(99, 102, 241, 0.2);
  box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}
.footer-btn::before {
  content: ''; position: absolute; top: 50%; left: 50%; width: 0; height: 0;
  background: rgba(255,255,255,0.2); border-radius: 50%;
  transform: translate(-50%, -50%); transition: width 0.4s, height 0.4s;
}
.footer-btn:hover::before { width: 60px; height: 60px; }
.footer-btn i { position: relative; z-index: 1; transition: transform 0.3s; }
.footer-btn:hover i { transform: scale(1.2); }

/* ==========================================
   Mobile Menu: Slide from Right (Side Menu)
   ========================================== */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  height: 100vh;
  background-color: white;
  transform: translateX(100%); /* خارج از صفحه در سمت راست */
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 60;
  box-shadow: -5px 0 25px rgba(0,0,0,0.1);
}

.dark .mobile-menu {
  background-color: #1f2937; /* gray-800 */
}

.mobile-menu.active {
  transform: translateX(0); /* ورود به صفحه */
}

.mobile-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 50;
}

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

/* ==========================================
   Cool Button Animations
   ========================================== */
.btn-cool {
  position: relative;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1;
}

.btn-cool::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  transition: left 0.6s ease;
  z-index: -1;
}

.btn-cool:hover::before {
  left: 100%;
}

.btn-cool:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 30px -5px rgba(99, 102, 241, 0.5), 0 8px 10px -6px rgba(99, 102, 241, 0.3);
}

.btn-cool-outline {
  position: relative;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1;
}

.btn-cool-outline::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 0%;
  background: rgba(255, 255, 255, 0.1);
  transition: height 0.4s ease;
  z-index: -1;
}

.btn-cool-outline:hover::after {
  height: 100%;
}

.btn-cool-outline:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.6);
  box-shadow: 0 10px 25px -5px rgba(255, 255, 255, 0.2);
}

@media (prefers-reduced-motion: reduce) { 
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; } 
}
@media (max-width: 768px) { 
  .parallax-bg { min-height: 80vh; }
  body { overflow-x: hidden; }
}