:root {
    --primary-color: #3d4f5c;
    --accent-color: #5a7486;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --success-color: #28a745;
    --bg-light: #f5f7fa;
    --bg-card: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #6c757d;
    --border-color: #d1d8e0;
    --header-bg: #3d4f5c;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: var(--header-bg);
    border-bottom: 3px solid var(--accent-color);
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo img {
    height: 50px;
    width: auto;
}

.logo-large {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-large img {
    height: 80px;
    width: auto;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

nav a {
    color: #ffffff;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 4px;
    transition: all 0.3s;
    font-weight: 500;
}

nav a:hover, nav a.active {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

/* Dropdown Menu */
nav .dropdown {
    position: relative;
}

nav .dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--header-bg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    min-width: 200px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    margin-top: 5px;
    padding: 5px 0;
}

nav .dropdown:hover .dropdown-menu {
    display: block;
}

nav .dropdown-menu li {
    list-style: none;
}

nav .dropdown-menu a {
    display: block;
    padding: 10px 16px;
    color: #ffffff;
    text-decoration: none;
    border-radius: 0;
}

nav .dropdown-menu a:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* Login Form */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-light) 0%, #e8ecf1 100%);
}

.login-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.login-box .logo-container {
    text-align: center;
    margin-bottom: 30px;
}

.login-box .logo-container img {
    max-width: 280px;
    height: auto;
}

.login-box h1 {
    text-align: center;
    margin-bottom: 10px;
    color: var(--text-primary);
    font-size: 1.8em;
}

.login-box p {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.card-header {
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.card-header h2 {
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5em;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-secondary);
    font-size: 0.9em;
}

input[type="text"],
input[type="password"],
input[type="email"],
select {
    width: 100%;
    padding: 12px 15px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1em;
    transition: all 0.3s;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(90, 116, 134, 0.1);
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-family: 'Courier New', monospace;
    font-size: 1em;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: var(--primary-color);
    color: #ffffff;
    font-weight: 600;
}

.btn-primary:hover {
    background: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(61, 79, 92, 0.3);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    box-shadow: 0 0 20px var(--danger-color);
}

.btn-warning {
    background: var(--warning-color);
    color: #212529;
    font-weight: 600;
}

.btn-secondary {
    background: #6c757d;
    color: #ffffff;
    border: 1px solid #6c757d;
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.85em;
}

.btn-block {
    width: 100%;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

thead {
    background: var(--bg-light);
    border-bottom: 2px solid var(--border-color);
}

th {
    padding: 12px;
    text-align: left;
    color: var(--primary-color);
    font-weight: 600;
}

td {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

tr:hover {
    background: var(--bg-light);
}

/* Alerts */
.alert {
    padding: 15px 20px;
    border-radius: 6px;
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background: rgba(40, 167, 69, 0.1);
    border-color: var(--success-color);
    color: #155724;
}

.alert-error {
    background: rgba(220, 53, 69, 0.1);
    border-color: var(--danger-color);
    color: #721c24;
}

/* Dashboard Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 25px;
    text-align: center;
    transition: all 0.3s;
}

.stat-card:hover {
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.stat-value {
    font-size: 2.5em;
    color: var(--primary-color);
    font-weight: 700;
}

.stat-label {
    color: var(--text-secondary);
    margin-top: 10px;
}

/* Status badges */
.badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8em;
    font-weight: bold;
}

.badge-active {
    background: rgba(40, 167, 69, 0.15);
    color: var(--success-color);
}

.badge-inactive {
    background: rgba(220, 53, 69, 0.15);
    color: var(--danger-color);
}

.badge-admin {
    background: rgba(255, 193, 7, 0.15);
    color: #856404;
}

/* Code blocks */
.code-block {
    background: #f8f9fa;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px 15px;
    font-family: 'Monaco', 'Courier New', monospace;
    color: #495057;
    overflow-x: auto;
    word-break: break-all;
    font-size: 0.9em;
}

/* Footer */
.footer {
    background: var(--header-bg);
    color: #ffffff;
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
    border-top: 3px solid var(--accent-color);
}

.footer p {
    margin: 0;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9em;
}

/* Utilities */
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.text-center { text-align: center; }
.flex { display: flex; }
.gap-10 { gap: 10px; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }