:root {
  --dark-green: #0d2818;
  --dark-green-darker: #0a1f13;
  --gold: #d4af37;
  --gold-light: #f1e0b5;
  --light-green: #28a745;
  --emerald: #10b981;
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --text-light: #f8fafc;
  --text-muted: #cbd5e1;
  --shadow-gold: rgba(212, 175, 55, 0.4);
  --shadow-emerald: rgba(16, 185, 129, 0.3);
}

* {
  box-sizing: border-box;
}

body {
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  background: linear-gradient(
    135deg,
    var(--dark-green) 0%,
    var(--dark-green-darker) 100%
  );
  color: var(--text-light);
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Particles */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--gold);
  border-radius: 50%;
  animation: float 25s infinite linear;
  opacity: 0.7;
}

@keyframes float {
  0% {
    transform: translateY(100vh) scale(0);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(-100px) scale(1);
    opacity: 0;
  }
}

/* Top Bar */
.top-bar {
  position: fixed;
  top: 20px;
  left: 20px;
  right: 20px;
  backdrop-filter: blur(25px);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  transition: all 0.4s ease;
}

.top-bar.hidden {
  transform: translateY(-100px);
  opacity: 0;
}

.btn-nav {
  padding: 12px 24px;
  font-weight: 600;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  backdrop-filter: blur(10px);
  font-size: 0.95rem;
}

.back-btn {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: var(--dark-green);
  box-shadow: 0 8px 25px var(--shadow-gold);
}

.back-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px var(--shadow-gold);
}

.toggle-btn {
  background: linear-gradient(135deg, var(--emerald), var(--light-green));
  color: white;
  box-shadow: 0 8px 25px var(--shadow-emerald);
}

.toggle-btn.active {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: var(--dark-green);
  box-shadow: 0 8px 25px var(--shadow-gold);
}

.toggle-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px var(--shadow-emerald);
}

.lang-select {
  min-width: 160px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  color: var(--text-light);
  backdrop-filter: blur(10px);
  padding: 10px 14px;
}

/* Main Content */
.main-content {
  padding-top: 120px;
  padding-bottom: 60px;
  position: relative;
  z-index: 10;
  min-height: 100vh;
}

.section {
  display: none;
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.section.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* Certificates Section */
.cert-hero {
  max-width: 1400px;
  margin: 0 auto;
  padding: 60px 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  min-height: calc(100vh - 140px);
}

.hero-text {
  text-align: center;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--gold), var(--light-green));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 24px;
}

.hero-divider {
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--light-green), var(--gold));
  border-radius: 2px;
  margin: 0 auto 28px;
  box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
}

.hero-desc {
  font-size: 1.2rem;
  line-height: 1.8;
  color: var(--text-light); /* بدّل النص للون واضح */
  max-width: 480px;
  margin: 0 auto;
}

.collage-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
}

.collage {
  width: 100%;
  max-width: 650px;
  height: 450px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 35px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.4);
  position: relative;
  overflow: hidden;
}

.cert {
  position: absolute;
  width: 120px;
  height: 160px;
  background: white;
  border-radius: 16px;
  padding: 10px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  border: 2px solid transparent;
}

.cert img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 12px;
}

.cert:hover {
  transform: scale(1.2) rotate(0deg);
  z-index: 20;
  box-shadow: 0 30px 60px rgba(16, 185, 129, 0.4);
  border-color: var(--emerald);
}

/* Gallery Section */
.gallery-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 80px 20px;
}

.gallery-header {
  text-align: center;
  margin-bottom: 80px;
}

.gallery-title {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 20px;
}

.gallery-subtitle {
  font-size: 1.3rem;
  color: var(--text-light);
}

.event {
  margin-bottom: 100px;
}

.event-header {
  text-align: center;
  margin-bottom: 50px;
}

.event-title {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--text-light);
  margin-bottom: 16px;
}

.event-date {
  color: var(--light-green);
  font-size: 1.2rem;
  font-weight: 600;
  background: var(--glass-bg);
  padding: 10px 20px;
  border-radius: 25px;
  display: inline-block;
  backdrop-filter: blur(10px);
}

/* Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.gallery-item {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
  transition: all 0.4s ease;
  cursor: pointer;
  height: 280px;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-item:hover {
  transform: translateY(-12px);
  box-shadow: 0 35px 70px rgba(16, 185, 129, 0.3);
}

.gallery-item:hover img {
  transform: scale(1.1);
}

/* Modals */
.modal-content {
  background: rgba(13, 40, 24, 0.98);
  backdrop-filter: blur(30px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
}

.modal-img {
  width: 100%;
  height: 100vh;
  object-fit: contain;
}

.modal-nav {
  position: absolute;
  top: 50%;
  width: 70px;
  height: 70px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 10;
}

.modal-prev {
  left: 40px;
  transform: translateY(-50%);
}

.modal-next {
  right: 40px;
  transform: translateY(-50%);
}

.modal-nav:hover {
  background: var(--emerald);
  transform: translateY(-50%) scale(1.1);
}

.modal-counter {
  position: absolute;
  bottom: 50px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  padding: 16px 32px;
  border-radius: 30px;
  font-size: 1.5rem;
  font-weight: 700;
  border: 1px solid var(--glass-border);
}

/* Responsive */
@media (max-width: 992px) {
  .cert-hero {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 40px 20px;
  }

  .collage {
    max-width: 90vw;
    height: 400px;
  }

  .gallery-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
  }
}

@media (max-width: 768px) {
  .top-bar {
    flex-direction: column;
    gap: 12px;
    padding: 20px !important;
  }

  .main-content {
    padding-top: 160px;
  }

  .cert {
    width: 95px;
    height: 125px;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
  }

  .gallery-item {
    height: 240px;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
}
/* زر الإغلاق في المودال */
#certModal .btn-close {
  position: absolute;
  top: 20px;
  right: 20px;
  z-index: 50; /* أعلى من الصورة */
  font-size: 2rem;
  color: var(--gold);
  background: rgba(0, 0, 0, 0.3);
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

#certModal .btn-close:hover {
  background: rgba(212, 175, 55, 0.8);
}