/**
 * CTFSully - Dark theme stylesheet
 * Cybersecurity challenge platform UI
 */

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --border-color: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --accent-green: #3fb950;
  --accent-red: #f85149;
  --accent-blue: #58a6ff;
  --accent-orange: #d29922;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: #79b8ff;
  text-decoration: underline;
}

/* Navigation */
nav {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav .logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--accent-green);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

nav a {
  text-decoration: none;
  color: var(--text-primary);
}
nav a:hover {
  color: var(--accent-blue);
  text-decoration: none;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* Headings */
h1, h2, h3 {
  margin-bottom: 1rem;
  font-weight: 600;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-secondary);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 1rem;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.2);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent-green);
  color: #fff;
}
.btn-primary:hover {
  background: #46c35a;
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background: var(--border-color);
}

.btn-danger {
  background: var(--accent-red);
  color: #fff;
}
.btn-danger:hover {
  background: #ff6b6b;
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.875rem;
}

/* Cards */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background: var(--bg-tertiary);
  font-weight: 600;
  color: var(--text-secondary);
}

tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* Alerts */
.alert {
  padding: 1rem;
  border-radius: 6px;
  margin-bottom: 1rem;
}

.alert-success {
  background: rgba(63, 185, 80, 0.15);
  border: 1px solid var(--accent-green);
  color: var(--accent-green);
}

.alert-error {
  background: rgba(248, 81, 73, 0.15);
  border: 1px solid var(--accent-red);
  color: var(--accent-red);
}

.alert-info {
  background: rgba(88, 166, 255, 0.15);
  border: 1px solid var(--accent-blue);
  color: var(--accent-blue);
}

/* Auth pages */
.auth-container {
  max-width: 400px;
  margin: 4rem auto;
  padding: 2rem;
}

.auth-container h1 {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-container .btn {
  width: 100%;
  margin-top: 0.5rem;
}

/* Challenge list */
.challenge-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
}

.challenge-item:last-child {
  border-bottom: none;
}

.challenge-info h3 {
  margin-bottom: 0.25rem;
}

.challenge-meta {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  border-radius: 4px;
  font-weight: 500;
}

.badge-solved {
  background: rgba(63, 185, 80, 0.2);
  color: var(--accent-green);
}

.badge-points {
  background: rgba(210, 153, 34, 0.2);
  color: var(--accent-orange);
}

/* Scoreboard */
.scoreboard-rank-1 { color: #ffd700; }
.scoreboard-rank-2 { color: #c0c0c0; }
.scoreboard-rank-3 { color: #cd7f32; }

/* Admin */
.admin-nav {
  background: var(--bg-tertiary);
  padding: 1rem;
  margin-bottom: 2rem;
  border-radius: 6px;
}

.admin-nav a {
  margin-right: 1rem;
  color: var(--text-secondary);
}
.admin-nav a:hover, .admin-nav a.active {
  color: var(--accent-blue);
}

/* Utility */
.text-muted { color: var(--text-secondary); }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-2 { margin-bottom: 1rem; }

/* Responsive */
@media (max-width: 768px) {
  nav {
    flex-direction: column;
    gap: 1rem;
  }
  .container {
    padding: 1rem;
  }
}