/* ==========================================================================
   ICARUS FLIGHT OPERATIONS DESIGN SYSTEM
   Modern Aerospace Theme:
   - Page Background: Crisp Clean White (#ffffff / #f8fafc)
   - Containers & Cards: Deep Space Black (#09090b) with soft curved corners
   - Typography: Crisp Pure White (#ffffff) on dark cards, Deep Ink (#09090b) on white
   - Micro-accents: Emerald Green (#10b981), Cyan Orbit (#38bdf8), Amber (#f59e0b), Crimson (#ef4444)
   ========================================================================== */

:root {
  --bg-page: #f8fafc;
  --bg-card: #09090b;
  --bg-card-elevated: #121215;
  --bg-card-subtle: #18181b;
  --bg-input: #18181b;
  
  --border-card: #27272a;
  --border-muted: #3f3f46;
  --border-subtle: #27272a;
  --border-bright: #ffffff;
  
  --text-main: #09090b;
  --text-card: #ffffff;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;
  
  --accent-green: #10b981;
  --accent-blue: #38bdf8;
  --accent-amber: #f59e0b;
  --accent-red: #ef4444;

  --radius-xl: 20px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Menlo', 'Courier New', monospace;
  --shadow-card: 0 16px 36px -10px rgba(0, 0, 0, 0.18), 0 0 1px 1px rgba(0, 0, 0, 0.05);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-page);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography & Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: inherit;
}

.mono {
  font-family: var(--font-mono);
}

.eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-weight: 700;
  display: block;
}

/* Containers */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2rem 1.5rem 5rem;
}

/* Top Navigation Bar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: #ffffff;
  border-bottom: 1px solid #e4e4e7;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: #000000;
}

.brand-title {
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #000000;
}

.brand-subtitle {
  font-size: 0.7rem;
  color: #71717a;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: #71717a;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: color 0.15s ease;
  font-weight: 600;
}

.nav-link:hover {
  color: #000000;
}

.nav-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  background: #09090b;
  color: #ffffff;
  letter-spacing: 0.05em;
  font-weight: 600;
  border: 1px solid #27272a;
}

/* Cards & Surface Containers */
.card, .status-card {
  background: var(--bg-card);
  color: var(--text-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-card);
  position: relative;
}

.card h1, .card h2, .card h3, .card h4 {
  color: #ffffff;
}

.card p {
  color: var(--text-muted);
}

.card .eyebrow {
  color: var(--text-muted);
}

/* Section Header Highlights */
.card-header-accent-green {
  border-left: 4px solid var(--accent-green);
}
.card-header-accent-blue {
  border-left: 4px solid var(--accent-blue);
}
.card-header-accent-red {
  border-left: 4px solid var(--accent-red);
}

/* Badges & Pills */
.badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-muted);
  background: var(--bg-card-subtle);
  color: var(--text-muted);
  font-weight: 600;
}

.badge-active {
  border-color: #ffffff;
  color: #000000;
  background: #ffffff;
  font-weight: 700;
}

.badge-green {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.badge-blue {
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.4);
}

.badge-amber {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.4);
}

.badge-red {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.4);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 700;
  padding: 0.75rem 1.4rem;
  cursor: pointer;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all 0.15s ease;
  border: 1px solid transparent;
  gap: 0.4rem;
}

.btn-primary {
  background: #ffffff;
  color: #000000;
  border-color: #ffffff;
}

.btn-primary:hover {
  background: #e4e4e7;
  color: #000000;
}

.btn-secondary {
  background: #18181b;
  color: #ffffff;
  border: 1px solid #3f3f46;
}

.btn-secondary:hover {
  background: #27272a;
  color: #ffffff;
  border-color: #71717a;
}

.btn-danger {
  background: #7f1d1d;
  color: #ffffff;
  border: 1px solid #991b1b;
}

.btn-danger:hover {
  background: #991b1b;
}

/* Form Controls with Dark Surface & Rounded Corners */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.45rem;
  font-weight: 600;
}

.form-control {
  width: 100%;
  padding: 0.8rem 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border-muted);
  border-radius: var(--radius-md);
  color: #ffffff;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  outline: none;
  transition: all 0.15s ease;
}

.form-control:focus {
  border-color: #ffffff;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.15);
}

.form-control::placeholder {
  color: #52525b;
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a1a1aa' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1em;
  padding-right: 2.5rem;
}

select.form-control option {
  background: #18181b;
  color: #ffffff;
}

/* Quiz Specific Components */
.quiz-card {
  background: #121215;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  color: #ffffff;
}

.quiz-card .eyebrow {
  color: #38bdf8;
}

.quiz-opt {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.85rem 1.1rem;
  border: 1px solid var(--border-muted);
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
  cursor: pointer;
  background: #18181b;
  color: #f4f4f5;
  transition: all 0.15s ease;
  font-size: 0.86rem;
}

.quiz-opt:hover {
  background: #27272a;
  border-color: #71717a;
}

.quiz-opt span code {
  background: #09090b;
  color: #38bdf8;
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

.quiz-opt input[type="radio"] {
  margin-top: 0.25rem;
  accent-color: #ffffff;
}

/* IDE Container */
.ide-container {
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #09090b;
}

.ide-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.25rem;
  background: #18181b;
  border-bottom: 1px solid var(--border-card);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #ffffff;
}

.ide-textarea {
  width: 100%;
  height: 280px;
  padding: 1rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.5;
  border: none;
  outline: none;
  resize: vertical;
  background: #09090b;
  color: #f4f4f5;
}

.ide-terminal {
  background: #000000;
  color: #4ade80;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  padding: 1rem 1.25rem;
  height: 160px;
  overflow-y: auto;
  white-space: pre-wrap;
  border-top: 1px solid var(--border-card);
}

/* Tables in Dark Cards */
.scoreboard-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
  color: #ffffff;
}

.scoreboard-table th {
  padding: 0.9rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-card);
  background: #18181b;
  font-weight: 700;
  text-align: left;
}

.scoreboard-table td {
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--border-card);
  color: #f4f4f5;
  vertical-align: middle;
}

.scoreboard-table tr:hover td {
  background: rgba(255, 255, 255, 0.025);
}

/* License Key Tag Pill */
.license-pill {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.65rem;
  background: #18181b;
  color: #38bdf8;
  border: 1px solid #0284c7;
  border-radius: 6px;
  user-select: all;
}

/* Alerts */
.alert {
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.alert-info {
  background: #0c4a6e;
  color: #38bdf8;
  border: 1px solid #0284c7;
}

.alert-warning {
  background: #451a03;
  color: #fbbf24;
  border: 1px solid #d97706;
}

.alert-danger {
  background: #450a0a;
  color: #f87171;
  border: 1px solid #b91c1c;
}

/* Anti-Cheat Floating Overlay Alert */
.anti-cheat-alert {
  position: fixed;
  top: 24px;
  right: 24px;
  background: #09090b;
  color: #ffffff;
  border: 1px solid #ef4444;
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  z-index: 9999;
  display: none;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

/* Custom License Key Grid in Admin */
.key-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.key-card {
  background: #18181b;
  border: 1px solid #27272a;
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.key-card:hover {
  border-color: #3f3f46;
}