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

:root {
  --font-sans: 'Outfit', 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Dark Theme Variables (Default) */
  --bg-primary: #0a0e17;
  --bg-secondary: #141b27;
  --bg-card: rgba(22, 30, 49, 0.7);
  --border-color: rgba(255, 255, 255, 0.08);
  --text-primary: #f0f4f9;
  --text-secondary: #8b9bb4;
  --accent-blue: #0088ff;
  --accent-green: #00e676;
  --accent-red: #ff3838;
  --accent-purple: #9c27b0;
  --card-glow-unsolved: 0 4px 20px rgba(0, 136, 255, 0.05);
  --card-glow-solved: 0 4px 20px rgba(0, 230, 118, 0.08);
  --shadow-primary: 0 8px 30px rgba(0, 0, 0, 0.3);
  --nav-bg: rgba(13, 20, 35, 0.8);
}

.light-theme {
  /* Light Theme Variables */
  --bg-primary: #f4f6fa;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --border-color: rgba(0, 0, 0, 0.08);
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --accent-blue: #0066cc;
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-purple: #8b5cf6;
  --card-glow-unsolved: 0 4px 20px rgba(0, 102, 204, 0.04);
  --card-glow-solved: 0 4px 20px rgba(16, 185, 129, 0.06);
  --shadow-primary: 0 8px 30px rgba(0, 0, 0, 0.05);
  --nav-bg: rgba(255, 255, 255, 0.8);
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  transition: background-color 0.3s ease, color 0.3s ease;
  min-height: 100vh;
}

/* Navbar Premium Styling */
.navbar {
  background-color: var(--nav-bg) !important;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.8rem 1.5rem;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}
.navbar-brand {
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--text-primary) !important;
  font-family: var(--font-sans);
  letter-spacing: -0.5px;
}
.navbar-brand span {
  color: var(--accent-blue);
}
.nav-link {
  color: var(--text-secondary) !important;
  font-weight: 500;
  transition: color 0.2s ease;
}
.nav-link:hover {
  color: var(--text-primary) !important;
}

/* Jumbotron Overhaul */
.jumbotron {
  background: var(--bg-secondary) !important;
  border: 1px solid var(--border-color);
  border-radius: 16px !important;
  padding: 2.5rem 2rem !important;
  box-shadow: var(--shadow-primary);
  margin-top: 2rem;
  margin-bottom: 2rem;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}
.jumbotron h1 {
  font-weight: 800;
  letter-spacing: -1px;
}
.jumbotron .lead {
  color: var(--text-secondary);
}

/* Cards & Grid Overhaul */
.card {
  background-color: var(--bg-card) !important;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-color) !important;
  border-radius: 14px !important;
  box-shadow: var(--shadow-primary);
  overflow: hidden;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease, border-color 0.3s ease !important;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 136, 255, 0.4) !important;
  box-shadow: 0 12px 30px rgba(0, 136, 255, 0.08);
}
.card.bg-success {
  background-color: var(--bg-card) !important;
  border-color: rgba(0, 230, 118, 0.4) !important;
}
.card.bg-success:hover {
  border-color: var(--accent-green) !important;
  box-shadow: 0 12px 30px rgba(0, 230, 118, 0.1);
}
.card-title {
  font-weight: 700;
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}
.card-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Badges */
.badge-category {
  display: inline-block;
  padding: 0.35em 0.7em;
  font-size: 75%;
  font-weight: 800;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  vertical-align: baseline;
  border-radius: 6px;
  text-transform: uppercase;
  margin-bottom: 0.8rem;
  letter-spacing: 0.8px;
}
.category-web { background: rgba(0, 136, 255, 0.15); color: var(--accent-blue); }
.category-osint { background: rgba(156, 39, 176, 0.15); color: var(--accent-purple); }
.category-crypto { background: rgba(255, 152, 0, 0.15); color: #ff9800; }
.category-reverse { background: rgba(233, 30, 99, 0.15); color: #e91e63; }
.category-misc { background: rgba(0, 230, 118, 0.15); color: var(--accent-green); }
.category-altro { background: rgba(120, 144, 156, 0.15); color: #78909c; }

/* Theme Toggle Button */
.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-left: 1rem;
}
.theme-toggle-btn:hover {
  background-color: var(--border-color);
}

/* Control Bar (Filters) */
.control-bar {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-primary);
}
.control-bar select, .control-bar input {
  background-color: var(--bg-primary) !important;
  border: 1px solid var(--border-color) !important;
  color: var(--text-primary) !important;
  border-radius: 8px !important;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}
.control-bar select:focus, .control-bar input:focus {
  border-color: var(--accent-blue) !important;
  box-shadow: 0 0 0 2px rgba(0, 136, 255, 0.15) !important;
  outline: none;
}

/* Form Styles */
.form-control {
  background-color: var(--bg-primary) !important;
  border: 1px solid var(--border-color) !important;
  color: var(--text-primary) !important;
  border-radius: 8px !important;
}
.form-control:focus {
  border-color: var(--accent-blue) !important;
  box-shadow: 0 0 0 2px rgba(0, 136, 255, 0.15) !important;
}
label {
  font-weight: 500;
  color: var(--text-secondary);
}

/* Collapsible drawer styling */
.challenge-desc-container {
  position: relative;
  overflow: hidden;
  max-height: 52px;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), margin-bottom 0.3s ease;
}
.challenge-desc-container.expanded {
  max-height: 1000px;
}
.desc-fade {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 24px;
  background: linear-gradient(to top, var(--bg-card), transparent);
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.light-theme .desc-fade {
  background: linear-gradient(to top, var(--bg-secondary), transparent);
}
.challenge-desc-container.expanded .desc-fade {
  opacity: 0;
}
.btn-toggle-desc {
  background: none;
  border: none;
  color: var(--accent-blue);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0;
  margin-top: 0.25rem;
  margin-bottom: 0.8rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.btn-toggle-desc:hover {
  text-decoration: underline;
}
.btn-toggle-desc svg {
  transition: transform 0.3s ease;
}
.challenge-desc-container.expanded + .btn-toggle-desc svg {
  transform: rotate(180deg);
}

/* Buttons */
.btn-primary {
  background-color: var(--accent-blue) !important;
  border-color: var(--accent-blue) !important;
  border-radius: 8px !important;
  font-weight: 600;
  padding: 0.5rem 1.2rem;
  transition: all 0.2s ease !important;
}
.btn-primary:hover {
  background-color: #0077e6 !important;
  border-color: #0077e6 !important;
  transform: translateY(-1px);
}
.btn-secondary {
  background-color: var(--bg-primary) !important;
  border: 1px solid var(--border-color) !important;
  color: var(--text-primary) !important;
  border-radius: 8px !important;
  font-weight: 500;
  transition: all 0.2s ease !important;
}
.btn-secondary:hover {
  background-color: var(--border-color) !important;
}

/* Solved State Overlay styling */
.solved-badge {
  background: rgba(0, 230, 118, 0.1);
  color: var(--accent-green);
  border: 1px solid rgba(0, 230, 118, 0.25);
  border-radius: 8px;
  padding: 0.5rem;
  text-align: center;
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Table styles */
.table {
  color: var(--text-primary) !important;
}
.table th {
  border-top: none !important;
  border-bottom: 2px solid var(--border-color) !important;
  color: var(--text-secondary);
}
.table td {
  border-top: 1px solid var(--border-color) !important;
  vertical-align: middle !important;
}

/* Admin Custom Tabs */
.admin-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2rem;
  gap: 1rem;
}
.admin-tab {
  padding: 0.75rem 1.25rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}
.admin-tab:hover {
  color: var(--text-primary);
}
.admin-tab.active {
  color: var(--accent-blue);
  border-bottom-color: var(--accent-blue);
}

.tab-content-panel {
  display: none;
}
.tab-content-panel.active {
  display: block;
}

/* Switch styling for Challenge visibility */
.switch {
  position: relative;
  display: inline-block;
  width: 46px;
  height: 24px;
}
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--border-color);
  transition: .3s;
  border-radius: 24px;
  border: 1px solid var(--border-color);
}
.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: var(--text-secondary);
  transition: .3s;
  border-radius: 50%;
}
input:checked + .slider {
  background-color: rgba(0, 230, 118, 0.2);
  border-color: rgba(0, 230, 118, 0.4);
}
input:checked + .slider:before {
  transform: translateX(22px);
  background-color: var(--accent-green);
}

/* Points badge */
.badge-points {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-primary);
  background: var(--bg-primary);
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

/* Form Sections */
.admin-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-primary);
}
.admin-section h4 {
  font-weight: 700;
  margin-bottom: 1.2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}
.alert-warning {
  background-color: rgba(255, 152, 0, 0.1) !important;
  color: #ff9800 !important;
  border: 1px solid rgba(255, 152, 0, 0.2) !important;
  border-radius: 8px;
}
.alert-danger {
  background-color: rgba(239, 68, 68, 0.1) !important;
  color: var(--accent-red) !important;
  border: 1px solid rgba(239, 68, 68, 0.2) !important;
  border-radius: 8px;
}
.alert-success {
  background-color: rgba(16, 185, 129, 0.1) !important;
  color: var(--accent-green) !important;
  border: 1px solid rgba(16, 185, 129, 0.2) !important;
  border-radius: 8px;
}