/* ============================================================
   Graduate Studies — نفس تصميم صفحة الكورسات
   خطوط: El Messiri للعناوين / IBM Plex Sans Arabic للنصوص
   ============================================================ */

:root {
  --primary: #D97706;
  --dark-card: #161616;
  --dark-bg: #0F0F0F;
  --font-display: 'El Messiri', 'Aref Ruqaa', serif;
  --font-body: 'IBM Plex Sans Arabic', 'Cairo', 'Tajawal', sans-serif;
}

body {
  font-family: var(--font-body);
  background: var(--dark-bg);
}

.font-display { font-family: var(--font-display) !important; }

::selection { background: rgba(217, 119, 6, 0.35); }

.grain {
  position: fixed; inset: 0; z-index: 60; pointer-events: none; opacity: 0.04;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ============ HEADER ============ */
.page-header-premium {
  padding: 100px 0 50px;
  text-align: center;
  background: linear-gradient(180deg, rgba(217, 119, 6, 0.05) 0%, transparent 100%);
  position: relative;
  overflow: hidden;
}

.page-header-premium::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  width: 1000px;
  height: 1000px;
  background: radial-gradient(circle, rgba(217, 119, 6, 0.03) 0%, transparent 70%);
  transform: translateX(-50%);
  z-index: 0;
}

.premium-section-title {
  position: relative;
  z-index: 1;
}

.premium-heading {
  font-size: 3.5rem;
  font-weight: 950;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
}

.premium-heading-main {
  color: #fff;
}

.premium-heading-sub {
  color: var(--primary);
}

.premium-section-desc {
  color: #A3A3A3;
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ============ SEARCH BAR ============ */
.grad-search-bar {
  max-width: 500px;
  margin: 0 auto 30px;
}

.grad-search-bar .form-control {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 50px;
  color: #fff;
  padding: 14px 24px;
  font-size: 1rem;
  font-family: var(--font-body);
  transition: 0.3s;
}

.grad-search-bar .form-control:focus {
  border-color: var(--primary);
  background: rgba(217,119,6,0.05);
  box-shadow: 0 0 0 3px rgba(217,119,6,0.15);
  outline: none;
  color: #fff;
}

.grad-search-bar .form-control::placeholder { color: rgba(255,255,255,0.35); }

/* ============ COURSE CARDS ============ */
.p-course-card {
  background: var(--dark-card);
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.p-course-card:hover {
  transform: translateY(-10px);
  border-color: var(--primary);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.p-course-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}

.p-course-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.p-course-card:hover .p-course-thumb img {
  transform: scale(1.1);
}

.badge-overlay {
  position: absolute;
  top: 15px;
  right: 15px;
  z-index: 2;
}

.p-badge {
  background: var(--primary);
  color: #000;
  padding: 4px 12px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 800;
}

.p-course-body {
  padding: 25px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.instructor-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 15px;
}

.instructor-avatar {
  width: 35px;
  height: 35px;
  border-radius: 50%;
  border: 1px solid var(--primary);
}

.instructor-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
}

.p-course-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 15px;
  line-height: 1.4;
  color: #fff;
}

.p-course-stats {
  display: flex;
  gap: 15px;
  color: #A3A3A3;
  font-size: 0.85rem;
  margin-bottom: 25px;
}

.p-course-stats span i {
  color: var(--primary);
  margin-left: 5px;
}

.p-course-foot {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.p-price {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--primary);
}

.btn-view-details {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  padding: 8px 18px;
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn-view-details:hover {
  background: var(--primary);
  color: #000;
}

/* ============ DYNAMIC CARD STYLES ============ */
.premium-card {
  background: #161616;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.4s cubic-bezier(0.165,0.84,0.44,1);
}

.premium-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: 0 20px 40px rgba(0,0,0,0.5), 0 0 20px rgba(217,119,6,0.08);
}

.course-list-card {
  cursor: pointer;
  background:
      radial-gradient(circle at 18% 12%, rgba(217,119,6,0.13), transparent 28%),
      linear-gradient(145deg, rgba(255,255,255,0.045), rgba(255,255,255,0.012)),
      #111113;
  border: 1px solid rgba(255, 255, 255, 0.075);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04), 0 18px 55px rgba(0,0,0,0.25);
}

.course-list-card:hover {
  transform: translateY(-7px);
  border-color: rgba(217,119,6,0.55);
  box-shadow: 0 24px 60px rgba(0,0,0,0.45), 0 0 0 1px rgba(217,119,6,0.08);
}

.course-card-thumb {
  height: 190px;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
      linear-gradient(135deg, rgba(217,119,6,0.16), rgba(99,102,241,0.09)),
      #101014;
  position: relative;
}

.course-card-thumb::after {
  content: '';
  position: absolute;
  inset: auto 0 0;
  height: 58%;
  background: linear-gradient(0deg, rgba(8,8,12,0.82), transparent);
  pointer-events: none;
}

.course-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.course-thumb-fallback {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
      radial-gradient(circle at 30% 24%, rgba(245,158,11,0.22), transparent 28%),
      linear-gradient(135deg, #1b1b25 0%, #0b0b10 100%);
}

.course-thumb-fallback i {
  width: 86px;
  height: 86px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 28px;
  color: #f59e0b;
  font-size: 2.4rem;
  background: rgba(217,119,6,0.11);
  border: 1px solid rgba(217,119,6,0.24);
  box-shadow: 0 18px 45px rgba(0,0,0,0.28);
}

.course-list-card .p-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  padding: 6px 13px;
  background: rgba(217,119,6,0.96);
  box-shadow: 0 10px 28px rgba(0,0,0,0.28);
}

.course-list-card .p-course-title {
  font-size: 1.04rem;
  font-weight: 900;
  min-height: 2.9em;
  margin-bottom: 12px;
  line-height: 1.45;
}

.course-list-card .p-course-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border: 0;
  padding: 0;
  margin-bottom: 16px;
}

.course-list-card .p-course-stats span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  border-radius: 999px;
  color: rgba(255,255,255,0.74);
  background: rgba(255,255,255,0.045);
  border: 1px solid rgba(255,255,255,0.06);
}

.course-list-card .p-course-stats i {
  color: var(--primary);
  margin: 0;
}

.course-price-paid,
.course-price-free {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 950;
  white-space: nowrap;
}

.course-price-paid { color: var(--primary); }
.course-price-free { color: #10b981; }

.course-actions {
  flex-wrap: wrap;
  justify-content: flex-end;
}

.btn-course-cart {
  background: var(--primary);
  color: #000;
  border: 1px solid transparent;
}

.btn-course-cart:hover {
  background: #f59e0b;
  color: #000;
}

.btn-course-details {
  color: #fff;
  background: rgba(255,255,255,0.045);
  border: 1px solid rgba(255,255,255,0.1);
}

.btn-course-details:hover {
  color: #fff;
  border-color: rgba(217,119,6,0.45);
  background: rgba(217,119,6,0.12);
}

/* ============ TABS ============ */
.grad-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 30px;
}

.grad-tab {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  color: #A3A3A3;
  padding: 10px 20px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 700;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.3s ease;
}

.grad-tab:hover {
  border-color: var(--primary);
  color: #fff;
}

.grad-tab.active {
  background: var(--primary);
  color: #000;
  border-color: var(--primary);
}

/* ============ EMPTY STATE ============ */
.empty-state {
  text-align: center;
  padding: 60px 20px;
}

.empty-state i {
  font-size: 3rem;
  color: rgba(217, 119, 6, 0.4);
  margin-bottom: 20px;
}

.empty-state p {
  color: #A3A3A3;
  font-size: 1.1rem;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 767px) {
  .premium-heading {
      font-size: 2rem;
  }

  .p-course-body {
      padding: 16px;
  }

  .p-course-title {
      font-size: 1.05rem;
  }

  .p-course-stats {
      gap: 10px;
      font-size: 0.8rem;
      margin-bottom: 16px;
  }

  .p-course-foot {
      flex-direction: column;
      gap: 10px;
      align-items: stretch;
  }

  .btn-view-details {
      text-align: center;
  }

  .grad-search-bar .form-control {
      max-width: 100%;
      padding: 12px 18px;
      font-size: 16px;
  }

  .course-card-thumb {
      height: 165px;
  }

  .course-actions,
  .course-actions .btn {
      width: 100%;
  }
}

@media (max-width: 480px) {
  .premium-heading {
      font-size: 1.75rem;
  }

  .p-course-thumb {
      aspect-ratio: 16/10;
  }

  .instructor-meta {
      gap: 8px;
      margin-bottom: 10px;
  }

  .instructor-avatar {
      width: 28px;
      height: 28px;
  }

  .instructor-name {
      font-size: 0.8rem;
  }

  .p-course-title {
      font-size: 0.95rem;
      margin-bottom: 10px;
  }

  .p-badge {
      font-size: 0.7rem;
      padding: 3px 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}