:root {
  --bg-color: #000000;
  --bg-gradient-start: #050505;
  --bg-gradient-end: #0a0a0a;
  --card-bg: #111111;
  --card-border: #222222;
  
  --text-primary: #ffffff;
  --text-secondary: #888888;
  --text-muted: #555555;

  --accent-color: #ffffff;
  --accent-hover: #e0e0e0;
  
  --danger-color: #dc2626;
  --danger-hover: #b91c1c;
  
  --success-color: #10b981;
  --warning-color: #f59e0b;
  
  --input-bg: #0a0a0a;
  --input-border: #333333;
  --input-focus: #ffffff;
  
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  background-image: 
    radial-gradient(circle at 50% 0%, #1a1a1a 0%, transparent 75%),
    linear-gradient(to bottom, var(--bg-gradient-start), var(--bg-gradient-end));
  color: var(--text-primary);
  min-height: 100vh;
  padding: 40px 20px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* Navigation */
.nav {
  background: rgba(17, 17, 17, 0.8);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 10px;
  margin-bottom: 40px;
  display: flex;
  gap: 5px;
  border: 1px solid var(--card-border);
  flex-wrap: wrap;
}

.nav a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 12px 20px;
  border-radius: 12px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-weight: 500;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.03);
}

.nav a.active {
  background: var(--accent-color);
  color: black;
  font-weight: 600;
}

/* Icons */
.icon {
  width: 20px;
  height: 20px;
  stroke-width: 2;
  stroke: currentColor;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: 20px;
  padding: 40px;
  margin-bottom: 30px;
  border: 1px solid var(--card-border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  border-color: #333;
  box-shadow: 0 20px 40px -10px rgba(0,0,0,0.5);
}

.card h1, .card h2 {
  color: white;
  margin-bottom: 30px;
  font-weight: 700;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: -0.02em;
}

/* Forms */
form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

label {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 8px;
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="file"],
select,
textarea {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: white;
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 1rem;
  width: 100%;
  transition: all 0.2s;
  font-family: var(--font-main);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--input-focus);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.05);
}

/* Buttons */
button, .btn {
  background: var(--accent-color);
  color: black;
  border: none;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

button:hover, .btn:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}

button:active, .btn:active {
  transform: translateY(0);
}

button.danger, .btn-danger {
  background: rgba(220, 38, 38, 0.1);
  color: #ef4444;
  border: 1px solid rgba(220, 38, 38, 0.2);
}

button.danger:hover, .btn-danger:hover {
  background: #dc2626;
  color: white;
  border-color: #dc2626;
}

button.secondary, .btn.secondary {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-primary);
}

button.secondary:hover, .btn.secondary:hover {
  background: rgba(255,255,255,0.05);
  border-color: var(--text-secondary);
}

/* Tables */
.table-container {
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--card-border);
}

table {
  width: 100%;
  border-collapse: collapse;
}

table th {
  background: #151515;
  padding: 18px 24px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--card-border);
}

table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--card-border);
  color: var(--text-primary);
  font-size: 0.95rem;
}

table tbody tr:hover {
  background: rgba(255, 255, 255, 0.01);
}

table tbody tr:last-child td {
  border-bottom: none;
}

/* Status Badges */
.badge {
  padding: 6px 12px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.status-pending { background: rgba(245, 158, 11, 0.1); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.2); }
.status-approved { background: rgba(16, 185, 129, 0.1); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.2); }
.status-denied { background: rgba(239, 68, 68, 0.1); color: #f87171; border: 1px solid rgba(239, 68, 68, 0.2); }

/* Alerts */
.alert {
  padding: 16px 20px;
  border-radius: 12px;
  margin-bottom: 24px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 12px;
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #fca5a5;
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: #6ee7b7;
}

/* Code */
code {
  background: rgba(255, 255, 255, 0.05);
  padding: 4px 8px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: #a5b4fc;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
  background: #333;
  border-radius: 5px;
  border: 2px solid var(--bg-color);
}

::-webkit-scrollbar-thumb:hover {
  background: #444;
}

/* Utilities */
/* Custom File Upload */
.file-upload-wrapper {
  position: relative;
  width: 100%;
}

.file-upload-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 30px;
  border: 2px dashed var(--card-border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  cursor: pointer;
  transition: all 0.3s ease;
  color: var(--text-secondary);
  gap: 10px;
  text-align: center;
}

.file-upload-label:hover {
  border-color: var(--accent-color);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.file-upload-label svg {
  width: 32px;
  height: 32px;
  opacity: 0.7;
}

.file-upload-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

/* Specific Button Styles */
.btn-warning {
  background: rgba(245, 158, 11, 0.1);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.btn-warning:hover {
  background: rgba(245, 158, 11, 0.2);
  border-color: #fbbf24;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.1);
}

.btn-icon {
  padding: 8px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.5;
}