/* ========================================================================= */
/* PrimeStudy PREMIUM WHITE THEME DESIGN SYSTEM                              */
/* ========================================================================= */

:root {
  /* Surface & Background Colors */
  --bg-color: #f8fafc;
  --bg-canvas: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-card-subtle: #f1f5f9;

  /* Primary Accent: Royal Indigo & Electric Violet */
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --primary-glow: rgba(79, 70, 229, 0.15);
  --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --accent-cyan: #0284c7;
  --accent-cyan-light: #e0f2fe;

  /* Status Colors */
  --success: #10b981;
  --success-light: #ecfdf5;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --danger: #ef4444;
  --danger-light: #fef2f2;

  /* Typography */
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;

  /* Borders & Shadows */
  --border-subtle: rgba(226, 232, 240, 0.9);
  --border-hover: rgba(99, 102, 241, 0.4);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 10px 30px -5px rgba(0, 0, 0, 0.04), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-card-hover: 0 20px 35px -8px rgba(79, 70, 229, 0.12), 0 1px 3px 0 rgba(0, 0, 0, 0.05);
  --glass-backdrop: blur(16px);
  --radius-card: 20px;

  /* Fonts */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Outfit', sans-serif;
}

/* Base Body Styles */
body {
  margin: 0;
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-sans);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Custom Clean Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 99px;
}

::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

/* Ambient Subtle Background Grid & Dots */
.bg-dots {
  background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
  background-size: 24px 24px;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-size: 40px 40px;
  background-image:
    linear-gradient(to right, rgba(99, 102, 241, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(99, 102, 241, 0.04) 1px, transparent 1px);
  mask-image: radial-gradient(ellipse at top center, black 50%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse at top center, black 50%, transparent 90%);
}

/* Glowing Background Ambient Blobs */
.ambient-glow-1 {
  position: fixed;
  top: -15%;
  left: -10%;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, rgba(248, 250, 252, 0) 70%);
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: -1;
}

.ambient-glow-2 {
  position: fixed;
  bottom: -15%;
  right: -10%;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.07) 0%, rgba(248, 250, 252, 0) 70%);
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: -1;
}

/* Glassmorphism Panels */
.glass-header {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border-bottom: 1px solid var(--border-subtle);
}

.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-card);
}

/* Card Hover Elevation */
.hover-card {
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.hover-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card-hover);
}

/* Interactive click micro-animation */
.btn-click-effect {
  transition: transform 0.15s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.15s;
}

.btn-click-effect:active {
  transform: scale(0.96);
}

/* Primary Gradient Button */
.btn-primary-gradient {
  background: var(--primary-gradient);
  color: #ffffff;
  font-family: var(--font-sans);
  font-weight: 700;
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.25);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-primary-gradient:hover {
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
  transform: translateY(-2px);
}

/* Entrance Fade Up Animation */
.animate-fade-up {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Shimmer Skeleton */
.skeleton {
  background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 37%, #f1f5f9 63%);
  background-size: 400% 100%;
  animation: skeletonPulse 1.4s ease infinite;
}

@keyframes skeletonPulse {
  0% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* ========================================================================= */
/* PLYR VIDEO PLAYER STYLING (MODERN CRISP CONTROLS)                         */
/* ========================================================================= */
.plyr {
  --plyr-color-main: #4f46e5;
  --plyr-video-control-color: #ffffff;
  --plyr-video-control-color-hover: #ffffff;
  --plyr-video-control-background-hover: #4f46e5;
  --plyr-video-progress-buffered-background: rgba(255, 255, 255, 0.25);
  --plyr-video-range-track-background: rgba(255, 255, 255, 0.2);
  --plyr-video-range-thumb-background: #4f46e5;
  --plyr-menu-background: #ffffff;
  --plyr-menu-color: #0f172a;
  --plyr-menu-radius: 14px;
  --plyr-tooltip-background: #0f172a;
  --plyr-tooltip-color: #ffffff;
  --plyr-control-radius: 10px;

  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.15);
  border: 1px solid rgba(226, 232, 240, 0.8);
}

.plyr__control--overlaid {
  background: var(--primary-gradient) !important;
  color: #ffffff !important;
  padding: 20px !important;
  box-shadow: 0 10px 25px rgba(79, 70, 229, 0.5) !important;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) !important;
}

.plyr__control--overlaid:hover {
  transform: scale(1.1) !important;
  box-shadow: 0 15px 35px rgba(79, 70, 229, 0.65) !important;
}