/* ==========================================================================
   Artino Solutions - Education Platform Custom Styles
   Matches artinosn.com & aitrain.my Design System
   ========================================================================== */

:root {
  --color-dark-bg: #111827;
  --color-dark-surface: #0B0F19;
  --color-dark-card: #1F2937;
  --color-dark-card-hover: #263346;
  --color-dark-subtle: #374151;
  --color-brand-blue: #38B6FF;
  --color-brand-teal: #14B8A6;
  --color-brand-indigo: #6366F1;
  --color-text-main: #F9FAFB;
  --color-text-muted: #9CA3AF;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--color-dark-bg);
  color: var(--color-text-main);
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #0B0F19;
}

::-webkit-scrollbar-thumb {
  background: #374151;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #38B6FF;
}

/* Glassmorphism Header & Surfaces */
.glass-nav {
  background: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(55, 65, 81, 0.6);
}

.glass-card {
  background: rgba(31, 41, 55, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(55, 65, 81, 0.7);
}

/* Subtle Glow Effects */
.glow-brand {
  box-shadow: 0 0 35px -5px rgba(56, 182, 255, 0.25);
}

.glow-subtle {
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 0 15px -3px rgba(56, 182, 255, 0.1);
}

.glow-card:hover {
  border-color: rgba(56, 182, 255, 0.4);
  box-shadow: 0 12px 30px -5px rgba(0, 0, 0, 0.6), 0 0 20px 0 rgba(56, 182, 255, 0.2);
  transform: translateY(-3px);
}

/* Hero Headline Typography - Balanced 2-line scaling */
.hero-headline {
  font-size: clamp(1.85rem, 4vw, 3.4rem);
  line-height: 1.15;
}

/* Gradient Text */
.text-gradient {
  background: linear-gradient(135deg, #FFFFFF 20%, #E2E8F0 60%, #38B6FF 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-blue {
  background: linear-gradient(135deg, #38B6FF 0%, #00BAA7 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Badge Styles */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.65rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.025em;
  transition: all 0.2s ease;
}

.badge-blue {
  background-color: rgba(56, 182, 255, 0.12);
  color: #38B6FF;
  border: 1px solid rgba(56, 182, 255, 0.25);
}

.badge-teal {
  background-color: rgba(20, 184, 166, 0.12);
  color: #14B8A6;
  border: 1px solid rgba(20, 184, 166, 0.25);
}

.badge-indigo {
  background-color: rgba(99, 102, 241, 0.12);
  color: #818CF8;
  border: 1px solid rgba(99, 102, 241, 0.25);
}

.badge-amber {
  background-color: rgba(245, 158, 11, 0.12);
  color: #FBBF24;
  border: 1px solid rgba(245, 158, 11, 0.25);
}

/* Modern Accessible Dialog (<dialog>) */
dialog {
  border: none;
  background: transparent;
  padding: 0;
  max-width: 95vw;
  width: 780px;
  margin: auto;
}

dialog::backdrop {
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: fadeIn 0.25s ease-out;
}

dialog[open] {
  animation: modalScaleUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

@keyframes modalScaleUp {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* Animations */
.fade-in {
  animation: fadeIn 0.4s ease-out forwards;
}

/* Interactive Tabs */
.tab-btn {
  transition: all 0.25s ease-in-out;
}

.tab-btn.active {
  background-color: #38B6FF;
  color: #111827;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(56, 182, 255, 0.35);
}


.tab-btn:not(.active):hover {
  background-color: #374151;
  color: #FFFFFF;
}