/* 
  COPYRIGHT & LICENSE 
  Copyright (c) 2026 Rahul Kothari. All Rights Reserved.
  Project: WebDev Pathway (https://www.webdevpathway.com)
*/

:root {
  /* ── BRAND CORE DESIGN TOKENS ── */
  --bg-core: #05060b;
  --bg-surface: #0b0d19;
  --bg-card: #111425;
  --bg-card-hover: #161b32;
  --border: rgba(255, 255, 255, 0.06);
  --border-glow: rgba(97, 218, 251, 0.2);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Accent Gradients */
  --p1-color: #06b6d4;
  --p1-sec: #3b82f6;
  --p1-grad: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --p2-color: #8b5cf6;
  --p2-sec: #d946ef;
  --p2-grad: linear-gradient(135deg, #8b5cf6 0%, #d946ef 100%);
  --p3-color: #f43f5e;
  --p3-sec: #ec4899;
  --p3-grad: linear-gradient(135deg, #f43f5e 0%, #ec4899 100%);
  --p4-color: #f59e0b;
  --p4-sec: #eab308;
  --p4-grad: linear-gradient(135deg, #f59e0b 0%, #eab308 100%);
  --p5-color: #10b981;
  --p5-sec: #059669;
  --p5-grad: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --p6-color: #6366f1;
  --p6-sec: #3b82f6;
  --p6-grad: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
  --p7-color: #f97316;
  --p7-sec: #ef4444;
  --p7-grad: linear-gradient(135deg, #f97316 0%, #ef4444 100%);
  --p8-color: #2563eb;
  --p8-sec: #1d4ed8;
  --p8-grad: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  --p9-color: #ec4899;
  --p9-sec: #be185d;
  --p9-grad: linear-gradient(135deg, #ec4899 0%, #be185d 100%);
  --p10-color: #8b5cf6;
  --p10-sec: #7c3aed;
  --p10-grad: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
  --p11-color: #06b6d4;
  --p11-sec: #0891b2;
  --p11-grad: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
  --p12-color: #10b981;
  --p12-sec: #059669;
  --p12-grad: linear-gradient(135deg, #10b981 0%, #059669 100%);
  
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-snappy: all 0.2s ease;
  
  --box-shadow-premium: 0 20px 40px rgba(0, 0, 0, 0.4);
  --hero-gradient: radial-gradient(circle at top right, #131230 0%, #05060b 60%);
}

/* ── LIGHT THEME OVERRIDES ── */
body.light-theme {
  --bg-core: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: #f1f5f9;
  --bg-card-hover: #e2e8f0;
  --border: rgba(15, 23, 42, 0.08);
  --border-glow: rgba(2, 132, 199, 0.15);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --p1-color: #0284c7;
  --p1-sec: #0369a1;
  --p1-grad: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  --p2-color: #6d28d9;
  --p2-sec: #a21caf;
  --p2-grad: linear-gradient(135deg, #6d28d9 0%, #a21caf 100%);
  --p3-color: #db2777;
  --p3-sec: #be185d;
  --p3-grad: linear-gradient(135deg, #db2777 0%, #be185d 100%);
  --p4-color: #d97706;
  --p4-sec: #b45309;
  --p4-grad: linear-gradient(135deg, #d97706 0%, #b45309 100%);
  --p5-color: #047857;
  --p5-sec: #065f46;
  --p5-grad: linear-gradient(135deg, #047857 0%, #065f46 100%);
  --p6-color: #4338ca;
  --p6-sec: #4338ca;
  --p6-grad: linear-gradient(135deg, #1d4ed8 0%, #4338ca 100%);
  --p7-color: #c2410c;
  --p7-sec: #b91c1c;
  --p7-grad: linear-gradient(135deg, #c2410c 0%, #b91c1c 100%);
  --p8-color: #1d4ed8;
  --p8-sec: #1e40af;
  --p8-grad: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
  --p9-color: #be185d;
  --p9-sec: #9d174d;
  --p9-grad: linear-gradient(135deg, #be185d 0%, #9d174d 100%);
  --p10-color: #6d28d9;
  --p10-sec: #5b21b6;
  --p10-grad: linear-gradient(135deg, #6d28d9 0%, #5b21b6 100%);
  --p11-color: #0891b2;
  --p11-sec: #0e7490;
  --p11-grad: linear-gradient(135deg, #0891b2 0%, #0e7490 100%);
  --p12-color: #047857;
  --p12-sec: #065f46;
  --p12-grad: linear-gradient(135deg, #047857 0%, #065f46 100%);
  
  --box-shadow-premium: 0 20px 40px rgba(15, 23, 42, 0.05);
  --hero-gradient: radial-gradient(circle at top right, #e0f2fe 0%, #f8fafc 60%);
}

/* Light theme overrides for personalized multi-color header shimmers */
body.light-theme .p-0-hdr, body.light-theme .p-6-hdr { --phase-text-g1: #4f46e5; --phase-text-g2: #7c3aed; }
body.light-theme .p-1-hdr, body.light-theme .p-11-hdr, body.light-theme .p-13-hdr { --phase-text-g1: #0284c7; --phase-text-g2: #0891b2; }
body.light-theme .p-2-hdr, body.light-theme .p-10-hdr { --phase-text-g1: #7c3aed; --phase-text-g2: #c084fc; }
body.light-theme .p-3-hdr, body.light-theme .p-15-hdr { --phase-text-g1: #db2777; --phase-text-g2: #f472b6; }
body.light-theme .p-4-hdr, body.light-theme .p-18-hdr { --phase-text-g1: #ca8a04; --phase-text-g2: #eab308; }
body.light-theme .p-5-hdr, body.light-theme .p-12-hdr, body.light-theme .p-17-hdr { --phase-text-g1: #059669; --phase-text-g2: #10b981; }
body.light-theme .p-7-hdr, body.light-theme .p-16-hdr { --phase-text-g1: #ea580c; --phase-text-g2: #f97316; }
body.light-theme .p-8-hdr, body.light-theme .p-14-hdr { --phase-text-g1: #1d4ed8; --phase-text-g2: #3b82f6; }
body.light-theme .p-9-hdr { --phase-text-g1: #db2777; --phase-text-g2: #ec4899; }

/* ── BASE & UTILITIES ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-core);
  color: var(--text-primary);
  font-family: 'Plus Jakarta Sans', sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

a {
  color: inherit;
  text-decoration: none;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-core);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ── LAYOUT CONTAINERS ── */
.app-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px 100px;
  position: relative;
  z-index: 10;
}

/* Floating BG Orbs */
.bg-glow-orbs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.15;
  animation: orbFloat 15s infinite alternate ease-in-out;
}
body.light-theme .glow-orb {
  opacity: 0.08;
}
.orb-1 {
  background: var(--p1-color);
  width: 500px;
  height: 500px;
  top: -100px;
  right: -100px;
}
.orb-2 {
  background: var(--p2-color);
  width: 400px;
  height: 400px;
  bottom: 10%;
  left: -100px;
  animation-delay: -5s;
}
.orb-3 {
  background: var(--p3-color);
  width: 350px;
  height: 350px;
  top: 40%;
  right: 15%;
  animation-delay: -10s;
}

@keyframes orbFloat {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, 30px) scale(1.08); }
}

/* ── HEADER / NAVIGATION BAR ── */
.navbar-hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 48px;
  background: rgba(11, 13, 25, 0.4);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 28px;
  box-shadow: var(--box-shadow-premium);
}
body.light-theme .navbar-hud {
  background: rgba(255, 255, 255, 0.6);
}
.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-logo-img {
  height: 38px;
  width: auto;
  display: block;
  object-fit: contain;
  border-radius: var(--radius-sm, 6px);
}
.logo-icon {
  font-size: 1.5rem;
  background: linear-gradient(135deg, var(--p1-color), var(--p2-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
}
.logo-title {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, var(--p1-color, #06b6d4), var(--p2-color, #8b5cf6), var(--p1-color, #06b6d4));
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shineText 6s linear infinite;
  filter: drop-shadow(0 2px 8px rgba(6, 182, 212, 0.15));
}
@keyframes shineText {
  to { background-position: 200% center; }
}
.logo-subtitle {
  font-size: 0.72rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: -2px;
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.hud-btn {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.15);
}
.hud-btn:hover {
  background: rgba(139, 92, 246, 0.08);
  border-color: var(--p2-color, #8b5cf6);
  color: #ffffff;
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.35);
  transform: translateY(-1.5px);
}

/* ── PROGRESS & STATS COMMAND PANEL ── */
.stats-command-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}
@media (max-width: 1024px) {
  .stats-command-grid {
    grid-template-columns: 1.2fr 1.0fr;
  }
  .stats-command-grid > .quiz-card-hud {
    grid-column: span 2;
  }
}
@media (max-width: 768px) {
  .stats-command-grid {
    grid-template-columns: 1fr;
  }
  .stats-command-grid > .quiz-card-hud {
    grid-column: span 1;
  }
}

.panel-glass {
  background: rgba(17, 20, 37, 0.4);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--box-shadow-premium);
  position: relative;
  overflow: hidden;
}
body.light-theme .panel-glass {
  background: rgba(255, 255, 255, 0.6);
}

.panel-glass::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--p1-color), var(--p2-color), var(--p3-color), var(--p4-color));
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 16px;
}
.progress-title {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  background: linear-gradient(120deg, #ffffff 0%, var(--p2-color, #8b5cf6) 40%, var(--p1-color, #06b6d4) 70%, #ffffff 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shineText 8s linear infinite;
}
.progress-percentage {
  font-size: 2rem;
  font-weight: 700;
  color: var(--p1-color);
  line-height: 1;
}

.progress-bar-container {
  height: 8px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 24px;
  border: 1px solid rgba(255, 255, 255, 0.02);
}
body.light-theme .progress-bar-container {
  background: rgba(0, 0, 0, 0.05);
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--p1-color), var(--p2-color));
  width: 0%;
  border-radius: 4px;
  transition: width 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.3);
}

.quick-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.quick-stat-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px;
  text-align: center;
}
.quick-stat-num {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}
.quick-stat-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2px;
  font-weight: 600;
}

/* Resume Learning Card */
.resume-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.resume-eyebrow {
  font-size: 0.68rem;
  color: var(--p3-color);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
}
.resume-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 8px 0 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.resume-btn {
  background: var(--p3-grad);
  color: #ffffff;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-snappy);
  border: none;
  box-shadow: 0 4px 12px rgba(244, 63, 94, 0.3);
}
.resume-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(244, 63, 94, 0.4);
}
.resume-empty {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  color: var(--text-muted);
  text-align: center;
  padding: 20px 0;
}
.resume-empty-icon {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

/* Quiz Card Actions */
.quiz-option-btn {
  outline: none;
}
.quiz-option-btn:hover {
  border-color: var(--p1-color) !important;
  background: var(--bg-card-hover) !important;
}
.quiz-option-btn.correct {
  background: rgba(16, 185, 129, 0.15) !important;
  border-color: #10b981 !important;
  color: #10b981 !important;
  font-weight: bold;
}
.quiz-option-btn.incorrect {
  background: rgba(244, 63, 94, 0.15) !important;
  border-color: #f43f5e !important;
  color: #f43f5e !important;
  font-weight: bold;
}
.streak-dot.active {
  background: var(--p4-color) !important;
  box-shadow: 0 0 8px var(--p4-color);
}

/* ── SEARCH & FILTER CONTROLS ── */
.search-filter-section {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.search-box-wrapper {
  position: relative;
  flex: 1;
  min-width: 280px;
}
.search-input {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 14px 20px 14px 46px;
  border-radius: var(--radius-md);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.9rem;
  transition: var(--transition-snappy);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
}
body.light-theme .search-input {
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}
.search-input:focus {
  border-color: var(--p1-color);
  outline: none;
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.15);
}
.search-icon-hud {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.filters-rack {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.filter-chip {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-snappy);
}
.filter-chip:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}
.filter-chip.active {
  background: var(--text-primary);
  border-color: var(--text-primary);
  color: var(--bg-core);
}

/* ── ROADMAP PATHS (PHASES) ── */
.roadmap-timeline {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.phase-track {
  background: rgba(11, 13, 25, 0.3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--box-shadow-premium);
  transition: var(--transition-smooth);
}
body.light-theme .phase-track {
  background: rgba(255, 255, 255, 0.5);
}
.phase-track:hover {
  border-color: var(--border-glow);
}

.phase-header-hud {
  padding: 24px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  position: relative;
  user-select: none;
}
.phase-header-hud::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
}
.p-1-hdr::after { background: var(--p1-grad); }
.p-2-hdr::after { background: var(--p2-grad); }
.p-3-hdr::after { background: var(--p3-grad); }
.p-4-hdr::after { background: var(--p4-grad); }
.p-5-hdr::after { background: var(--p5-grad); }
.p-6-hdr::after { background: var(--p6-grad); }
.p-7-hdr::after { background: var(--p7-grad); }
.p-8-hdr::after { background: var(--p8-grad); }
.p-9-hdr::after { background: var(--p9-grad); }
.p-10-hdr::after { background: var(--p10-grad); }
.p-11-hdr::after { background: var(--p11-grad); }
.p-12-hdr::after { background: var(--p12-grad); }

.phase-info-area {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.phase-number-tag {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
}
.p-1-hdr { --phase-text-g1: #a5f3fc; --phase-text-g2: #93c5fd; }
.p-1-hdr .phase-number-tag { color: var(--p1-color); }

.p-2-hdr { --phase-text-g1: #ddd6fe; --phase-text-g2: #fbcfe8; }
.p-2-hdr .phase-number-tag { color: var(--p2-color); }

.p-3-hdr { --phase-text-g1: #fecdd3; --phase-text-g2: #fed7aa; }
.p-3-hdr .phase-number-tag { color: var(--p3-color); }

.p-4-hdr { --phase-text-g1: #fef08a; --phase-text-g2: #fed7aa; }
.p-4-hdr .phase-number-tag { color: var(--p4-color); }

.p-5-hdr { --phase-text-g1: #a7f3d0; --phase-text-g2: #d9f99d; }
.p-5-hdr .phase-number-tag { color: var(--p5-color); }

.p-6-hdr { --phase-text-g1: #c7d2fe; --phase-text-g2: #93c5fd; }
.p-6-hdr .phase-number-tag { color: var(--p6-color); }

.p-7-hdr { --phase-text-g1: #fed7aa; --phase-text-g2: #fecdd3; }
.p-7-hdr .phase-number-tag { color: var(--p7-color); }

.p-8-hdr { --phase-text-g1: #bfdbfe; --phase-text-g2: #c7d2fe; }
.p-8-hdr .phase-number-tag { color: var(--p8-color); }

.p-9-hdr { --phase-text-g1: #fbcfe8; --phase-text-g2: #fda4af; }
.p-9-hdr .phase-number-tag { color: var(--p9-color); }

.p-10-hdr { --phase-text-g1: #ddd6fe; --phase-text-g2: #fbcfe8; }
.p-10-hdr .phase-number-tag { color: var(--p10-color); }

.p-11-hdr { --phase-text-g1: #a5f3fc; --phase-text-g2: #93c5fd; }
.p-11-hdr .phase-number-tag { color: var(--p11-color); }

.p-12-hdr { --phase-text-g1: #a7f3d0; --phase-text-g2: #d9f99d; }
.p-12-hdr .phase-number-tag { color: var(--p12-color); }

.phase-title-text {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  background: linear-gradient(120deg, var(--text-primary) 0%, var(--phase-text-g1, var(--p2-color)) 40%, var(--phase-text-g2, var(--p1-color)) 70%, var(--text-primary) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shineText 8s linear infinite;
  display: inline-block;
}
.phase-summary-stats {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.phase-accordion-trigger {
  font-size: 1.1rem;
  color: var(--text-secondary);
  transition: transform 0.3s ease;
}
.phase-track.open .phase-accordion-trigger {
  transform: rotate(180deg);
}

.phase-lessons-container {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), padding 0.4s;
  padding: 0 32px;
}
.phase-track.open .phase-lessons-container {
  max-height: 2000px; /* arbitrary high value for smooth animation */
  padding: 8px 32px 32px;
}

.lessons-divider-bar {
  height: 1px;
  background: var(--border);
  margin-bottom: 24px;
}

.lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

/* ── ESSAY (LESSON) CARD ── */
.lesson-card-glass {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition-smooth);
  cursor: pointer;
}
.lesson-card-glass:hover {
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: var(--box-shadow-premium);
}
body.light-theme .lesson-card-glass:hover {
  border-color: rgba(15, 23, 42, 0.15);
}

.lesson-top-meta {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}
.lesson-num-badge {
  font-size: 0.72rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 4px;
  color: var(--text-secondary);
}
body.light-theme .lesson-num-badge {
  background: rgba(0, 0, 0, 0.03);
}

/* Custom glowing borders on active click path per Phase */
.p-1-card:hover { border-color: rgba(6, 182, 212, 0.35); }
.p-2-card:hover { border-color: rgba(139, 92, 246, 0.35); }
.p-3-card:hover { border-color: rgba(244, 63, 94, 0.35); }
.p-4-card:hover { border-color: rgba(245, 158, 11, 0.35); }
.p-5-card:hover { border-color: rgba(16, 185, 129, 0.35); }
.p-6-card:hover { border-color: rgba(99, 102, 241, 0.35); }
.p-7-card:hover { border-color: rgba(249, 115, 22, 0.35); }
.p-8-card:hover { border-color: rgba(37, 99, 235, 0.35); }
.p-9-card:hover { border-color: rgba(236, 72, 153, 0.35); }
.p-10-card:hover { border-color: rgba(139, 92, 246, 0.35); }
.p-11-card:hover { border-color: rgba(6, 182, 212, 0.35); }
.p-12-card:hover { border-color: rgba(16, 185, 129, 0.35); }

/* Progress Completion Checkbox HUD */
.checkbox-hud-container {
  position: relative;
  display: inline-block;
  cursor: pointer;
  user-select: none;
}
.checkbox-hud-input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}
.checkbox-hud-box {
  height: 18px;
  width: 18px;
  border-radius: 4px;
  border: 1.5px solid var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-snappy);
}
.checkbox-hud-box::after {
  content: "✓";
  color: #ffffff;
  font-weight: 900;
  font-size: 0.7rem;
  display: none;
}
.checkbox-hud-input:checked ~ .checkbox-hud-box {
  border-color: #10b981;
  background-color: #10b981;
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
}
.checkbox-hud-input:checked ~ .checkbox-hud-box::after {
  display: block;
}

.lesson-title {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 0.98rem;
  line-height: 1.4;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.lesson-subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.lesson-bottom-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
.lesson-read-time {
  font-size: 0.72rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}
.lesson-action-link {
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 4px;
}
.p-1-card .lesson-action-link { color: var(--p1-color); }
.p-2-card .lesson-action-link { color: var(--p2-color); }
.p-3-card .lesson-action-link { color: var(--p3-color); }
.p-4-card .lesson-action-link { color: var(--p4-color); }
.p-5-card .lesson-action-link { color: var(--p5-color); }
.p-6-card .lesson-action-link { color: var(--p6-color); }
.p-7-card .lesson-action-link { color: var(--p7-color); }
.p-8-card .lesson-action-link { color: var(--p8-color); }
.p-9-card .lesson-action-link { color: var(--p9-color); }
.p-10-card .lesson-action-link { color: var(--p10-color); }
.p-11-card .lesson-action-link { color: var(--p11-color); }
.p-12-card .lesson-action-link { color: var(--p12-color); }

.lesson-action-arrow, .lesson-action-arrow-svg {
  transition: transform 0.2s ease;
}
.lesson-card-glass:hover .lesson-action-arrow,
.lesson-card-glass:hover .lesson-action-arrow-svg {
  transform: translateX(4px);
}

/* Completion status card state overlay */
.lesson-card-glass.completed {
  border-color: rgba(16, 185, 129, 0.2);
}
body.light-theme .lesson-card-glass.completed {
  border-color: rgba(16, 185, 129, 0.25);
  background: rgba(16, 185, 129, 0.01);
}
.lesson-card-glass.completed::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  box-shadow: inset 0 0 10px rgba(16, 185, 129, 0.03);
  pointer-events: none;
}

/* No results state */
.no-results-panel {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.01);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  grid-column: 1 / -1;
  display: none;
}
.no-results-title {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 8px;
}
.no-results-text {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ── FOOTER SEQUENCE ── */
.portal-footer {
  margin-top: 80px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
}
.footer-link:hover {
  color: var(--text-primary);
}

/* ── FLOATING STUDY NOTES SCRATCHPAD BUTTON EFFECT ── */
#scratchpad-toggle-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.6);
}
#scratchpad-textarea:focus {
  border-color: var(--p2-color) !important;
}

/* === AUTH MODAL & SYNCHRONIZATION PREMIUM STYLING === */
#auth-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(10, 11, 16, 0.6);
  backdrop-filter: blur(10px);
  z-index: 3000;
  align-items: center;
  justify-content: center;
}
.auth-container {
  background: var(--bg-card, #13141a);
  border: 2px solid var(--border, #2a2c38);
  border-radius: var(--radius-sm, 12px);
  width: 100%;
  max-width: 380px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  font-family: 'Plus Jakarta Sans', sans-serif;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
body.light-theme .auth-container {
  background: #ffffff !important;
  border-color: #cbd5e1 !important;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.08) !important;
}
.auth-header {
  padding: 20px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(0, 0, 0, 0.15);
}
body.light-theme .auth-header {
  border-bottom-color: rgba(0, 0, 0, 0.06) !important;
  background: rgba(0, 0, 0, 0.02) !important;
}
.auth-header h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--purple, #8b5cf6);
  font-family: 'Outfit', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
body.light-theme .auth-header h3 {
  color: var(--purple, #7c3aed) !important;
}
.auth-close {
  background: transparent;
  border: none;
  color: var(--text-muted, #64748b);
  cursor: pointer;
  font-size: 1.2rem;
}
.auth-close:hover {
  color: var(--text-primary, #e4e2dc);
}
body.light-theme .auth-close:hover {
  color: var(--text-primary, #0f172a) !important;
}
.auth-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.auth-tabs {
  display: flex;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  margin-bottom: 8px;
}
body.light-theme .auth-tabs {
  border-bottom-color: rgba(0, 0, 0, 0.06) !important;
}
.auth-tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted, #64748b);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 10px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  text-align: center;
}
.auth-tab-btn.active {
  color: var(--purple, #8b5cf6);
  border-bottom-color: var(--purple, #8b5cf6);
}
body.light-theme .auth-tab-btn.active {
  color: var(--purple, #7c3aed) !important;
  border-bottom-color: var(--purple, #7c3aed) !important;
}
.auth-form {
  display: none;
  flex-direction: column;
  gap: 12px;
}
.auth-form.active {
  display: flex;
}
.auth-input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.auth-input-group label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted, #64748b);
}
.auth-input {
  background: var(--bg-surface, #1a1c24);
  border: 1px solid var(--border, #2a2c38);
  color: var(--text-primary, #e4e2dc);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.8rem;
  outline: none;
  font-family: inherit;
}
body.light-theme .auth-input {
  background: var(--bg-surface, #f1f5f9) !important;
  border-color: var(--border, #cbd5e1) !important;
  color: var(--text-primary, #0f172a) !important;
}
.auth-btn-submit {
  background: linear-gradient(135deg, #8b5cf6 0%, #d946ef 100%);
  border: none;
  border-radius: 6px;
  color: #ffffff;
  padding: 10px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  transition: transform 0.2s;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.2);
}
.auth-btn-submit:hover {
  transform: translateY(-1px);
}
.auth-error {
  color: #ef4444;
  font-size: 0.72rem;
  display: none;
  margin-top: -4px;
}
.sync-status-indicator {
  font-size: 0.65rem;
  color: var(--text-muted, #64748b);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.sync-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #cbd5e1;
  display: inline-block;
}
.sync-status-dot.synced {
  background: #10b981;
}
.sync-status-dot.error {
  background: #ef4444;
}
.sync-status-dot.pending {
  background: #ca8a04;
  animation: pulse-sync 1.5s infinite;
}
@keyframes pulse-sync {
  0% { opacity: 0.3; }
  50% { opacity: 1; }
  100% { opacity: 0.3; }
}

/* ── WELCOME & PURPOSE HEADER ── */
.welcome-header-hud {
  background: rgba(17, 20, 37, 0.4);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  box-shadow: var(--box-shadow-premium);
  position: relative;
  overflow: hidden;
}
body.light-theme .welcome-header-hud {
  background: rgba(255, 255, 255, 0.6);
}
.welcome-header-hud::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--p1-color), var(--p2-color));
}
.welcome-content {
  flex: 1;
}
.welcome-eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--p1-color);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}
.welcome-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.85rem;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.25;
  background: linear-gradient(120deg, #ffffff 0%, var(--p2-color, #8b5cf6) 40%, var(--p1-color, #06b6d4) 70%, #ffffff 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shineText 8s linear infinite;
  filter: drop-shadow(0 2px 10px rgba(139, 92, 246, 0.1));
}
.welcome-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 800px;
}
.welcome-badge {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 200px;
}
body.light-theme .welcome-badge {
  background: rgba(0, 0, 0, 0.02);
}
.badge-icon {
  font-size: 2rem;
}
.badge-title {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}
.badge-value {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--p2-color);
}

/* ── INTERACTIVE TOPIC GRID ── */
.roadmap-overview-grid {
  margin-bottom: 48px;
}
.roadmap-grid-header {
  margin-bottom: 24px;
}
.section-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 4px;
}
.section-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.roadmap-grid-items {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.grid-item-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}
.grid-item-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--box-shadow-premium);
}
.grid-item-card::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 3px;
  opacity: 0.4;
  transition: var(--transition-snappy);
}
.grid-item-card:hover::after {
  height: 5px;
  opacity: 1;
}
.grid-card-icon {
  font-size: 1.5rem;
  line-height: 1;
  padding: 8px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
body.light-theme .grid-card-icon {
  background: rgba(0, 0, 0, 0.02);
}
.grid-card-body {
  flex: 1;
}
.grid-card-title {
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text-primary);
}
.grid-card-desc {
  font-size: 0.72rem;
  color: var(--text-secondary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Grid Card Specific Accent Colors */
.p-0-grid-card::after { background: var(--p6-grad); } /* Setup color - Indigo */
.p-1-grid-card::after { background: var(--p1-grad); }
.p-2-grid-card::after { background: var(--p2-grad); }
.p-3-grid-card::after { background: var(--p3-grad); }
.p-4-grid-card::after { background: var(--p4-grad); }
.p-5-grid-card::after { background: var(--p5-grad); }
.p-6-grid-card::after { background: var(--p6-grad); }
.p-7-grid-card::after { background: var(--p7-grad); }
.p-8-grid-card::after { background: var(--p8-grad); }
.p-9-grid-card::after { background: var(--p9-grad); }
.p-10-grid-card::after { background: var(--p10-grad); }
.p-11-grid-card::after { background: var(--p11-grad); }
.p-12-grid-card::after { background: var(--p12-grad); }
.p-13-grid-card::after { background: var(--p1-grad); } /* CS - Cyan */
.p-14-grid-card::after { background: var(--p8-grad); } /* TS - Blue */
.p-15-grid-card::after { background: var(--p3-grad); } /* Testing - Rose */
.p-16-grid-card::after { background: var(--p7-grad); } /* DevOps - Orange */
.p-17-grid-card::after { background: var(--p5-grad); } /* Projects - Emerald */
.p-18-grid-card::after { background: var(--p4-grad); } /* Career - Amber */

/* ── LOCKED CARD STYLING ── */
.lesson-card-glass.lesson-locked {
  opacity: 0.65;
  cursor: not-allowed;
}
.lesson-card-glass.lesson-locked:hover {
  transform: none;
  background: var(--bg-card);
  border-color: var(--border);
  box-shadow: none;
}
.lock-icon {
  font-size: 0.95rem;
  color: var(--text-muted);
}
.lesson-action-locked {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}
.lesson-card-glass.lesson-locked .lesson-subtitle {
  color: var(--text-muted);
}

/* Phase Headers 0, 13-18 Border Colors */
.p-0-hdr { --phase-text-g1: #c7d2fe; --phase-text-g2: #93c5fd; }
.p-0-hdr::after { background: var(--p6-grad); }

.p-13-hdr { --phase-text-g1: #a5f3fc; --phase-text-g2: #93c5fd; }
.p-13-hdr::after { background: var(--p1-grad); }

.p-14-hdr { --phase-text-g1: #bfdbfe; --phase-text-g2: #c7d2fe; }
.p-14-hdr::after { background: var(--p8-grad); }

.p-15-hdr { --phase-text-g1: #fecdd3; --phase-text-g2: #fed7aa; }
.p-15-hdr::after { background: var(--p3-grad); }

.p-16-hdr { --phase-text-g1: #fed7aa; --phase-text-g2: #fecdd3; }
.p-16-hdr::after { background: var(--p7-grad); }

.p-17-hdr { --phase-text-g1: #a7f3d0; --phase-text-g2: #d9f99d; }
.p-17-hdr::after { background: var(--p5-grad); }

.p-18-hdr { --phase-text-g1: #fef08a; --phase-text-g2: #fed7aa; }
.p-18-hdr::after { background: var(--p4-grad); }

.p-0-hdr .phase-number-tag { color: var(--p6-color); }
.p-13-hdr .phase-number-tag { color: var(--p1-color); }
.p-14-hdr .phase-number-tag { color: var(--p8-color); }
.p-15-hdr .phase-number-tag { color: var(--p3-color); }
.p-16-hdr .phase-number-tag { color: var(--p7-color); }
.p-17-hdr .phase-number-tag { color: var(--p5-color); }
.p-18-hdr .phase-number-tag { color: var(--p4-color); }

/* Responsive adjustments for welcome header */
@media (max-width: 768px) {
  .welcome-header-hud {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
  }
  .welcome-badge {
    width: 100%;
    justify-content: center;
  }
  .welcome-title {
    font-size: 1.35rem;
  }
}

/* ── CURRICULUM GRID COLLAPSIBLE ACCORDION STYLING ── */
.roadmap-grid-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
  padding: 10px 0;
}
.roadmap-accordion-trigger {
  font-size: 1.1rem;
  color: var(--text-secondary);
  transition: var(--transition-smooth);
}
.roadmap-overview-grid.open .roadmap-accordion-trigger {
  transform: rotate(180deg);
}
.roadmap-grid-items-container {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.16, 1, 0.3, 1), padding 0.5s;
}
.roadmap-overview-grid.open .roadmap-grid-items-container {
  max-height: 1600px; /* high value for full grid expansion */
  padding-top: 16px;
}

/* ── KNOW MORE MODAL (SCREENSHOT INSPIRED) ── */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 3000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.know-more-modal-container {
  background: #0d0f19;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  width: 100%;
  max-width: 580px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8);
  font-family: 'Plus Jakarta Sans', sans-serif;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: modalSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes modalSlideIn {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
body.light-theme .know-more-modal-container {
  background: #ffffff !important;
  border-color: #cbd5e1 !important;
  box-shadow: 0 25px 60px rgba(15, 23, 42, 0.1) !important;
}
.know-more-modal-header {
  padding: 24px 28px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.know-more-eyebrow {
  color: var(--p7-color, #f97316); /* orange like in the screenshot */
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-family: 'Outfit', sans-serif;
}
.know-more-close {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary, #94a3b8);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  transition: var(--transition-snappy);
}
.know-more-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary, #f8fafc);
}
body.light-theme .know-more-close {
  background: rgba(0, 0, 0, 0.03);
  border-color: rgba(0, 0, 0, 0.08);
  color: #475569;
}
body.light-theme .know-more-close:hover {
  background: rgba(0, 0, 0, 0.06);
  color: #0f172a;
}
.know-more-modal-body {
  padding: 12px 28px 28px;
  overflow-y: auto;
  max-height: 75vh;
}
.know-more-section-title {
  font-family: 'Outfit', sans-serif;
  color: var(--text-primary, #f8fafc);
  font-size: 1.15rem;
  font-weight: 800;
  margin-top: 16px;
  margin-bottom: 12px;
}
.know-more-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.know-more-list li {
  font-size: 0.85rem;
  color: var(--text-secondary, #94a3b8);
  line-height: 1.5;
  position: relative;
  padding-left: 18px;
}
.know-more-list li::before {
  content: "•";
  color: var(--text-muted, #64748b);
  position: absolute;
  left: 4px;
  font-weight: bold;
}
.know-more-list li strong {
  color: var(--text-primary, #f8fafc);
}

/* === PREMIUM VISUAL ENHANCEMENTS START === */
#quantum-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.22;
  transition: opacity 0.3s;
}
body.light-theme #quantum-bg {
  opacity: 0.08;
}

/* Module A: Card Spotlight Mouse Glow */
.lesson-card-glass, .panel-glass, .quiz-card-hud, .resume-card {
  position: relative;
  overflow: hidden;
}
.lesson-card-glass::before, .panel-glass::before, .quiz-card-hud::before, .resume-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
    300px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(139, 92, 246, 0.07),
    transparent 80%
  );
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
  z-index: 1;
}
.lesson-card-glass:hover::before, .panel-glass:hover::before, .quiz-card-hud:hover::before, .resume-card:hover::before {
  opacity: 1;
}

/* Module C: Cyberpunk Rotating Gradient Outlines */
@property --angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}
@keyframes rotateBorderGrad {
  to {
    --angle: 360deg;
  }
}
.premium-rotating-border {
  position: relative;
  padding: 1px;
  overflow: hidden;
  border-radius: var(--radius-md, 12px) !important;
  border: none !important;
  background: rgba(255, 255, 255, 0.05);
}
.premium-rotating-border::before {
  content: "";
  position: absolute;
  width: 160%;
  height: 160%;
  top: -30%;
  left: -30%;
  background: conic-gradient(
    from var(--angle, 0deg),
    transparent 50%,
    var(--p1-color, #06b6d4),
    var(--p2-color, #8b5cf6) 85%,
    transparent
  );
  animation: rotateBorderGrad 8s linear infinite;
  z-index: 1;
  pointer-events: none;
}
.premium-rotating-border > * {
  z-index: 2;
  position: relative;
  background: var(--bg-surface-dark, #0b0d19) !important;
  border-radius: calc(var(--radius-md, 12px) - 1px) !important;
  height: 100%;
  width: 100%;
}

/* === ACHIEVEMENTS & MILESTONES DASHBOARD SYSTEM === */
.achievement-badge-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  padding: 16px;
  border-radius: var(--radius-md);
  position: relative;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: visible !important;
}

body.light-theme .achievement-badge-card {
  background: rgba(0, 0, 0, 0.01);
  border-color: rgba(0, 0, 0, 0.06);
}

/* Badge Icon Wrapper */
.badge-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
}

body.light-theme .badge-icon-wrapper {
  background: rgba(0, 0, 0, 0.02);
  border-color: rgba(0, 0, 0, 0.06);
}

.badge-svg {
  width: 24px;
  height: 24px;
  transition: transform 0.3s ease;
}

/* Info styling */
.badge-info {
  flex-grow: 1;
}

.badge-title {
  margin: 0 0 4px 0;
  font-family: 'Outfit', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  transition: color 0.3s ease;
}

.badge-desc {
  margin: 0;
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.35;
}

/* Tooltip layout */
.badge-tooltip {
  position: absolute;
  bottom: 105%;
  left: 50%;
  transform: translateX(-50%) translateY(5px);
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #ffffff;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.72rem;
  font-family: 'Plus Jakarta Sans', sans-serif;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: all 0.2s ease;
  z-index: 100;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
}

.achievement-badge-card:hover .badge-tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* State: Locked */
.achievement-badge-card.locked .badge-icon-wrapper {
  filter: grayscale(1) opacity(0.3);
  background: rgba(255, 255, 255, 0.01);
  border-color: transparent;
}

.achievement-badge-card.locked .badge-title {
  color: var(--text-muted);
}

/* State: Unlocked styles per phase badge */
.achievement-badge-card.unlocked {
  background: rgba(139, 92, 246, 0.05);
  border-color: rgba(139, 92, 246, 0.3);
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.1);
  animation: pulseUnlockedBadge 3s infinite alternate;
}

body.light-theme .achievement-badge-card.unlocked {
  background: rgba(139, 92, 246, 0.02);
  border-color: rgba(139, 92, 246, 0.2);
}

.achievement-badge-card.unlocked .badge-icon-wrapper {
  filter: none;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2) 0%, rgba(217, 70, 239, 0.2) 100%);
  border-color: rgba(139, 92, 246, 0.4);
}

.achievement-badge-card.unlocked .badge-svg {
  transform: scale(1.1);
}

.achievement-badge-card.unlocked .badge-title {
  color: #ffffff;
  text-shadow: 0 0 10px rgba(139, 92, 246, 0.4);
}

body.light-theme .achievement-badge-card.unlocked .badge-title {
  color: var(--purple) !important;
}

/* Custom unlocks color themes per badge */
#badge-html.unlocked {
  border-color: rgba(6, 182, 212, 0.4);
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.15);
  background: rgba(6, 182, 212, 0.05);
}
#badge-html.unlocked .badge-icon-wrapper {
  background: rgba(6, 182, 212, 0.15);
  border-color: rgba(6, 182, 212, 0.4);
  color: #06b6d4;
}

#badge-css.unlocked {
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.15);
  background: rgba(59, 130, 246, 0.05);
}
#badge-css.unlocked .badge-icon-wrapper {
  background: rgba(59, 130, 246, 0.15);
  border-color: rgba(59, 130, 246, 0.4);
  color: #3b82f6;
}

#badge-js.unlocked {
  border-color: rgba(234, 179, 8, 0.4);
  box-shadow: 0 0 20px rgba(234, 179, 8, 0.15);
  background: rgba(234, 179, 8, 0.05);
}
#badge-js.unlocked .badge-icon-wrapper {
  background: rgba(234, 179, 8, 0.15);
  border-color: rgba(234, 179, 8, 0.4);
  color: #eab308;
}

#badge-backend.unlocked {
  border-color: rgba(16, 185, 129, 0.4);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.15);
  background: rgba(16, 185, 129, 0.05);
}
#badge-backend.unlocked .badge-icon-wrapper {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.4);
  color: #10b981;
}

#badge-system.unlocked {
  border-color: rgba(249, 115, 22, 0.4);
  box-shadow: 0 0 20px rgba(249, 115, 22, 0.15);
  background: rgba(249, 115, 22, 0.05);
}
#badge-system.unlocked .badge-icon-wrapper {
  background: rgba(249, 115, 22, 0.15);
  border-color: rgba(249, 115, 22, 0.4);
  color: #f97316;
}

#badge-ai.unlocked {
  border-color: rgba(139, 92, 246, 0.4);
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.15);
  background: rgba(139, 92, 246, 0.05);
}
#badge-ai.unlocked .badge-icon-wrapper {
  background: rgba(139, 92, 246, 0.15);
  border-color: rgba(139, 92, 246, 0.4);
  color: #8b5cf6;
}

@keyframes pulseUnlockedBadge {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(-2px);
  }
}
/* === PREMIUM VISUAL ENHANCEMENTS END === */

/* Navbar button text compression on mobile */
@media (max-width: 600px) {
  .navbar-hud {
    padding: 12px 16px !important;
    margin-bottom: 24px !important;
  }
  .logo-subtitle {
    display: none;
  }
  .hud-btn span {
    display: none !important;
  }
  .hud-btn {
    padding: 10px !important;
    gap: 0 !important;
  }
}