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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: #08070b;
  color: #e2e8f0;
  overflow-x: hidden;
}

::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: #08070b;
}

::-webkit-scrollbar-thumb {
  background: #e50914;
  border-radius: 99px;
}

.hero-orb-primary {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(229, 9, 20, 0.35) 0%, transparent 70%);
  top: -200px;
  left: -150px;
  pointer-events: none;
  border-radius: 50%;
}

.hero-orb-secondary {
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.22) 0%, transparent 70%);
  top: -100px;
  right: -100px;
  pointer-events: none;
  border-radius: 50%;
}

.hero-grid-pattern {
  background-image: linear-gradient(rgba(229, 9, 20, 0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(229, 9, 20, 0.05) 1px, transparent 1px);
  background-size: 50px 50px;
}

.gradient-text {
  background: linear-gradient(135deg, #ff2e4d 0%, #ff9900 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.card-glass {
  background: rgba(22, 19, 29, 0.65);
  border: 1px solid rgba(229, 9, 20, 0.2);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.card-glass:hover {
  border-color: rgba(255, 65, 65, 0.6);
  transform: translateY(-6px) scale(1.015);
  box-shadow: 0 24px 60px rgba(229, 9, 20, 0.28), 0 0 0 1px rgba(229, 9, 20, 0.35);
}

.badge-new {
  background: linear-gradient(90deg, #e50914, #ff7a00);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 2px 7px;
  border-radius: 99px;
  text-transform: uppercase;
}

.badge-hot {
  background: linear-gradient(90deg, #dc2626, #f59e0b);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 2px 7px;
  border-radius: 99px;
  text-transform: uppercase;
  animation: pulseBadge 2s infinite;
}

@keyframes pulseBadge {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.category-pill {
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 99px;
  border: 1px solid rgba(229, 9, 20, 0.3);
  background: transparent;
  color: #94a3b8;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.category-pill:hover,
.category-pill.active {
  background: linear-gradient(135deg, #e50914, #ff7a00);
  border-color: transparent;
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(229, 9, 20, 0.45);
}

.search-input-field {
  background: rgba(22, 19, 29, 0.85);
  border: 1px solid rgba(229, 9, 20, 0.3);
  backdrop-filter: blur(8px);
  color: #e2e8f0;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-input-field:focus {
  border-color: #e50914;
  box-shadow: 0 0 0 3px rgba(229, 9, 20, 0.25);
}

.search-input-field::placeholder {
  color: #64748b;
}

.btn-primary-action {
  background: linear-gradient(135deg, #e50914 0%, #ff4141 100%);
  color: #ffffff;
  font-weight: 700;
  padding: 12px 28px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.btn-primary-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(229, 9, 20, 0.5);
}

.stat-card-box {
  background: rgba(18, 15, 23, 0.75);
  border: 1px solid rgba(229, 9, 20, 0.22);
  border-radius: 16px;
  padding: 20px 20px;
  text-align: center;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.stat-card-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(229, 9, 20, 0.6), transparent);
  opacity: 0.6;
  transition: opacity 0.3s ease;
}

.stat-card-box:hover {
  border-color: rgba(229, 9, 20, 0.5);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(229, 9, 20, 0.18);
}

.stat-card-box:hover::before {
  opacity: 1;
}

.stat-card-icon-badge {
  background: rgba(229, 9, 20, 0.1);
  border: 1px solid rgba(229, 9, 20, 0.22);
  border-radius: 12px;
  padding: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}

.stat-card-value {
  background: linear-gradient(135deg, #FF3B47 0%, #E50914 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.stat-card-label {
  color: #94a3b8;
  font-size: 0.75rem;
  font-weight: 500;
  margin-top: 4px;
}

.scroll-reveal-hidden {
  opacity: 0;
  transform: translateY(32px);
}

.scroll-reveal-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.navigation-bar-blur {
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(8, 7, 11, 0.88);
  border-bottom: 1px solid rgba(229, 9, 20, 0.18);
}

.level-tag-badge {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.level-beginner {
  background: rgba(34, 197, 94, 0.15);
  color: #4ade80;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.level-intermediate {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.level-advanced {
  background: rgba(229, 9, 20, 0.2);
  color: #f87171;
  border: 1px solid rgba(229, 9, 20, 0.4);
}

.level-all {
  background: rgba(229, 9, 20, 0.15);
  color: #fca5a5;
  border: 1px solid rgba(229, 9, 20, 0.3);
}

.technology-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(255, 122, 0, 0.1);
  color: #ffb066;
  border: 1px solid rgba(255, 122, 0, 0.25);
}

.course-icon-container {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  flex-shrink: 0;
}

.footer-divider-line {
  height: 1px;
  background: linear-gradient(90deg, transparent, #e50914, #ff7a00, transparent);
}

.line-clamp-description {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

@media (max-width: 640px) {
  .hero-orb-primary,
  .hero-orb-secondary {
    width: 280px;
    height: 280px;
  }
}

/* ── Promo Modal ─────────────────────────────────────────── */

.promo-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: rgba(4, 3, 8, 0.82);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  animation: promoOverlayIn 0.35s ease forwards;
}

.promo-overlay.closing {
  animation: promoOverlayOut 0.28s ease forwards;
}

@keyframes promoOverlayIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes promoOverlayOut {
  from { opacity: 1; }
  to   { opacity: 0; }
}

.promo-dialog {
  position: relative;
  width: 100%;
  max-width: 520px;
  border-radius: 24px;
  border: 1px solid rgba(245, 158, 11, 0.25);
  background: linear-gradient(160deg, #141018 0%, #0d0b12 60%, #110c0e 100%);
  box-shadow:
    0 0 0 1px rgba(245, 158, 11, 0.1),
    0 32px 80px rgba(0, 0, 0, 0.7),
    0 0 120px rgba(229, 9, 20, 0.12);
  overflow: hidden;
  animation: promoDialogIn 0.42s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  outline: none;
}

.promo-overlay.closing .promo-dialog {
  animation: promoDialogOut 0.24s ease forwards;
}

@keyframes promoDialogIn {
  from {
    opacity: 0;
    transform: scale(0.88) translateY(20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes promoDialogOut {
  from {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
  to {
    opacity: 0;
    transform: scale(0.94) translateY(10px);
  }
}

.promo-dialog-accent-bar {
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, #e50914 0%, #f59e0b 50%, #ff7a00 100%);
}

.promo-dialog-glow {
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 360px;
  height: 200px;
  background: radial-gradient(ellipse, rgba(245, 158, 11, 0.13) 0%, transparent 70%);
  pointer-events: none;
}

.promo-dialog-body {
  padding: 32px 32px 28px;
}

.promo-dialog-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 24px;
}

.promo-dialog-icon {
  font-size: 2rem;
  line-height: 1;
  flex-shrink: 0;
  filter: drop-shadow(0 0 12px rgba(245, 158, 11, 0.6));
  animation: promoIconPulse 3s ease-in-out infinite;
}

@keyframes promoIconPulse {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 10px rgba(245,158,11,0.55)); }
  50%       { transform: scale(1.12); filter: drop-shadow(0 0 20px rgba(245,158,11,0.85)); }
}

.promo-dialog-close-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid rgba(100, 116, 139, 0.3);
  background: rgba(100, 116, 139, 0.08);
  color: #64748b;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.promo-dialog-close-btn:hover {
  border-color: rgba(248, 113, 113, 0.5);
  background: rgba(229, 9, 20, 0.12);
  color: #f87171;
}

.promo-dialog-close-btn:focus-visible {
  outline: 2px solid #f59e0b;
  outline-offset: 2px;
}

.promo-dialog-eyebrow {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #f59e0b;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.promo-dialog-eyebrow::before {
  content: '';
  display: inline-block;
  width: 18px;
  height: 2px;
  background: #f59e0b;
  border-radius: 2px;
}

.promo-dialog-title {
  font-size: 1.4rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.promo-dialog-title span {
  background: linear-gradient(90deg, #f59e0b 0%, #ff7a00 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.promo-dialog-description {
  font-size: 0.85rem;
  color: #94a3b8;
  line-height: 1.6;
  margin-bottom: 28px;
}

.promo-coupon-block {
  background: rgba(245, 158, 11, 0.06);
  border: 1px dashed rgba(245, 158, 11, 0.35);
  border-radius: 14px;
  padding: 18px 20px;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 6px;
}

.promo-coupon-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #64748b;
  margin-bottom: 4px;
}

.promo-coupon-code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #fbbf24;
  text-shadow: 0 0 24px rgba(251, 191, 36, 0.35);
  user-select: all;
}

.promo-coupon-badge {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #f59e0b;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 6px;
  padding: 4px 10px;
  white-space: nowrap;
}

.promo-dialog-expiry {
  font-size: 0.75rem;
  color: #475569;
  text-align: center;
  margin-bottom: 20px;
}

.promo-dialog-expiry strong {
  color: #64748b;
}

.promo-dialog-cta {
  display: block;
  width: 100%;
  padding: 14px 24px;
  border-radius: 12px;
  border: none;
  background: linear-gradient(135deg, #f59e0b 0%, #ff7a00 100%);
  color: #0d0b0a;
  font-weight: 800;
  font-size: 0.9rem;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: all 0.25s ease;
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
  letter-spacing: 0.01em;
}

.promo-dialog-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(245, 158, 11, 0.5);
}

.promo-dialog-cta:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
}

@media (max-width: 480px) {
  .promo-dialog-body {
    padding: 24px 20px 20px;
  }

  .promo-dialog-title {
    font-size: 1.15rem;
  }

  .promo-coupon-code {
    font-size: 1.2rem;
  }

  .promo-coupon-block {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}