@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  --bg-dark: #07090e;
  --bg-card: rgba(13, 18, 30, 0.45);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(14, 165, 233, 0.35);

  --color-primary: #0ea5e9;    /* cyan-500 */
  --color-secondary: #8b5cf6;  /* violet-500 */
  --color-accent: #10b981;     /* emerald-500 */
  --color-text-main: #f8fafc;  /* slate-50 */
  --color-text-dim: #94a3b8;   /* slate-400 */
  --color-text-muted: #64748b; /* slate-500 */

  --glow-primary: rgba(14, 165, 233, 0.2);
  --glow-secondary: rgba(139, 92, 246, 0.2);

  --mx: 50%;
  --my: 50%;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scrollbar-width: thin;
  scrollbar-color: var(--border-hover) var(--bg-dark);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--border-glass);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

body {
  background-color: var(--bg-dark);
  color: var(--color-text-main);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* CSS Grid Hover Trail (Silicon Wafer) */
.trail-grid-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.trail-grid {
  display: flex;
  flex-wrap: wrap;
  border-radius: 50%;
  overflow: hidden;
  pointer-events: auto;
  border: 1px solid rgba(14, 165, 233, 0.1);
  box-shadow: 0 0 50px rgba(14, 165, 233, 0.05);
}
.trail-grid-item {
  box-sizing: border-box;
  border: 1px solid rgba(14, 165, 233, 0.05);
  background: rgba(14, 165, 233, 0.1);
  opacity: 0;
  transition: opacity 1.5s ease;
}
.trail-grid-item:hover {
  background: rgba(14, 165, 233, 0.6);
  border-color: rgba(14, 165, 233, 0.8);
  opacity: 1;
  transition-duration: 0s;
  box-shadow: 0 0 10px rgba(14, 165, 233, 0.5);
}

/* Fix pointer events to allow hovering over the background grid */
.hero-content {
  pointer-events: none;
}
.hero-content * {
  pointer-events: auto;
}
/* Background Grid Overlay */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.15;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 9, 14, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-glass);
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  text-decoration: none;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  align-items: center;
}
.nav-links a {
  text-decoration: none;
  color: var(--color-text-dim);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.3s, text-shadow 0.3s;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--color-text-main);
  text-shadow: 0 0 10px rgba(14, 165, 233, 0.4);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-family: var(--font-heading);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-text-main);
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.4);
}
.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text-main);
  border-color: var(--border-glass);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}
.btn-accent {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid rgba(16, 185, 129, 0.3);
}
.btn-accent:hover {
  background: rgba(16, 185, 129, 0.08);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}
.btn-sm {
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
}

/* Glass Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 2rem;
  backdrop-filter: blur(16px);
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), border-color 0.4s, box-shadow 0.4s;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.05), rgba(139, 92, 246, 0.05));
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
}
.card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 10px 30px rgba(14, 165, 233, 0.06);
  transform: translateY(-4px);
}
.card:hover::before {
  opacity: 1;
}

/* Hero Section */
.hero {
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  padding: 6rem 2rem 4rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  min-height: calc(100vh - 70px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  background: radial-gradient(
    800px circle at var(--mx) var(--my),
    rgba(14, 165, 233, 0.14),
    rgba(139, 92, 246, 0.07) 40%,
    transparent 80%
  );
}
/* Smooth gradient transition to hide harsh lines at bottom of hero */
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 150px;
  background: linear-gradient(to bottom, transparent, var(--bg-dark));
  pointer-events: none;
  z-index: 0;
}
.hero-tag {
  display: inline-block;
  padding: 0.35rem 1rem;
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.3);
  color: var(--color-primary);
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.hero h1 {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}
.hero h1 span.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 30%, var(--color-secondary) 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p.lead {
  font-size: 1.25rem;
  color: var(--color-text-dim);
  max-width: 700px;
  margin: 0 auto 2.5rem auto;
}
.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Sections */
.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 5rem 2rem;
}
.section-header {
  margin-bottom: 3.5rem;
  text-align: center;
}
.section-header h2 {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.section-header p {
  color: var(--color-text-dim);
  font-size: 1.1rem;
}

/* Grid System */
.grid-2 {
  display: grid;
  grid-template-cols: repeat(2, 1fr);
  gap: 2rem;
}
.grid-3 {
  display: grid;
  grid-template-cols: repeat(3, 1fr);
  gap: 2rem;
}
.grid-4 {
  display: grid;
  grid-template-cols: repeat(4, 1fr);
  gap: 1.5rem;
}

@media (max-width: 900px) {
  .grid-3, .grid-4 {
    grid-template-cols: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-cols: 1fr;
  }
  .hero h1 {
    font-size: 2.5rem;
  }
  .hero-cta {
    flex-direction: column;
  }
}

/* Themes list custom styling */
.theme-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.theme-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}
.theme-card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}
.theme-card p {
  color: var(--color-text-dim);
  font-size: 0.95rem;
  flex-grow: 1;
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 0;
}
.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--border-glass);
  transform: translateX(-50%);
}
.timeline-item {
  position: relative;
  width: 50%;
  padding: 1.5rem 3rem;
  box-sizing: border-box;
}
.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}
.timeline-item:nth-child(even) {
  left: 50%;
  text-align: left;
}
.timeline-item::after {
  content: '';
  position: absolute;
  top: 2rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-dark);
  border: 3px solid var(--color-primary);
  z-index: 1;
  transition: all 0.3s;
}
.timeline-item:nth-child(odd)::after {
  right: -8px;
}
.timeline-item:nth-child(even)::after {
  left: -8px;
}
.timeline-item:hover::after {
  background: var(--color-primary);
  box-shadow: 0 0 12px var(--color-primary);
}
.timeline-date {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
  font-size: 1rem;
}
.timeline-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}
.timeline-desc {
  color: var(--color-text-dim);
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .timeline::before {
    left: 20px;
  }
  .timeline-item {
    width: 100%;
    left: 0 !important;
    padding-left: 3rem;
    padding-right: 0;
    text-align: left !important;
  }
  .timeline-item::after {
    left: 12px !important;
  }
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}
.form-label {
  display: block;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  color: var(--color-text-dim);
}
.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(13, 18, 30, 0.8);
  border: 1px solid var(--border-glass);
  border-radius: 8px;
  color: var(--color-text-main);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: all 0.3s;
}
.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 8px rgba(14, 165, 233, 0.2);
}
select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1.25rem;
}

/* FAQs */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  overflow: hidden;
}
.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  text-align: left;
  background: transparent;
  border: none;
  color: var(--color-text-main);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.3s;
}
.faq-question:hover {
  background: rgba(255, 255, 255, 0.02);
}
.faq-question::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--color-primary);
  transition: transform 0.3s;
}
.faq-item.active .faq-question::after {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  padding: 0 1.5rem;
  color: var(--color-text-dim);
  font-size: 0.95rem;
}
.faq-item.active .faq-answer {
  max-height: 200px; /* Adjust dynamically */
  padding-bottom: 1.25rem;
}

/* Dashboard Specific Layout */
.dashboard-grid {
  display: grid;
  grid-template-cols: 280px 1fr;
  gap: 2rem;
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 2rem;
}
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  color: var(--color-text-dim);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s;
}
.sidebar-link:hover, .sidebar-link.active {
  color: var(--color-text-main);
  background: rgba(14, 165, 233, 0.1);
  border-left: 3px solid var(--color-primary);
}
.dash-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
@media (max-width: 768px) {
  .dashboard-grid {
    grid-template-cols: 1fr;
  }
}

/* Bingo Board Game */
.bingo-container {
  max-width: 600px;
  margin: 0 auto;
}
.bingo-grid {
  display: grid;
  grid-template-cols: repeat(5, 1fr);
  gap: 0.5rem;
  margin-top: 1.5rem;
}
.bingo-cell {
  aspect-ratio: 1;
  background: rgba(13, 18, 30, 0.7);
  border: 1px solid var(--border-glass);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 0.25rem;
  text-align: center;
  font-size: 0.7rem;
  cursor: pointer;
  user-select: none;
  transition: all 0.3s;
  color: var(--color-text-dim);
}
.bingo-cell:hover {
  border-color: var(--color-primary);
  background: rgba(14, 165, 233, 0.05);
}
.bingo-cell.checked {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.2), rgba(139, 92, 246, 0.2));
  border-color: var(--color-primary);
  color: var(--color-text-main);
  font-weight: 600;
  box-shadow: 0 0 10px rgba(14, 165, 233, 0.15);
}
.bingo-cell.free {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(14, 165, 233, 0.2));
  border-color: var(--color-accent);
}
.bingo-cell.free.checked {
  color: #fff;
  border-color: var(--color-accent);
}

/* Streak and Stats Badge */
.stat-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  border-radius: 50px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 600;
}
.stat-badge.warn {
  background: rgba(139, 92, 246, 0.1);
  border-color: rgba(139, 92, 246, 0.3);
  color: var(--color-secondary);
}

/* Easter Egg decryption styling */
.terminal-input-container {
  display: flex;
  align-items: center;
  background: #000;
  border: 1px solid #333;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-family: monospace;
  color: #10b981;
}
.terminal-input-container input {
  background: transparent;
  border: none;
  color: #10b981;
  outline: none;
  font-family: monospace;
  font-size: 1rem;
  width: 100%;
  margin-left: 0.5rem;
}
.matrix-glow {
  text-shadow: 0 0 8px #10b981;
  color: #10b981;
}

/* Modal Styling */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.modal.show {
  display: flex;
  opacity: 1;
}
.modal-content {
  background: #0b0f19;
  border: 1px solid var(--border-hover);
  border-radius: 16px;
  padding: 2.5rem;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 10px 40px rgba(14, 165, 233, 0.2);
  text-align: center;
  transform: scale(0.9);
  transition: transform 0.3s ease;
}
.modal.show .modal-content {
  transform: scale(1);
}
.modal-close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 1.5rem;
  background: transparent;
  border: none;
  color: var(--color-text-dim);
  cursor: pointer;
}
.modal-close:hover {
  color: var(--color-text-main);
}

/* --- Mobile Responsiveness --- */
@media (max-width: 768px) {
  .hero {
    padding: 4rem 1rem 2rem 1rem;
    min-height: calc(100vh - 80px);
  }
  .hero h1 {
    font-size: 2.5rem;
  }
  .hero p.lead {
    font-size: 1rem;
  }
  .hero-cta {
    flex-direction: column;
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
  }
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .nav-container {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }
  .section {
    padding: 3rem 1.5rem;
  }
  .section-header h2 {
    font-size: 2rem;
  }
}