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

body {
    font-family: 'Segoe UI', Tahoma,  Verdana, sans-serif;
    background-color: #f4f4f4;
    line-height: 1.6;
}

/* Header */
.header {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 20px 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.05)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.05)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.03)"/><circle cx="10" cy="60" r="0.5" fill="rgba(255,255,255,0.03)"/><circle cx="90" cy="40" r="0.5" fill="rgba(255,255,255,0.03)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.header h1 {
    text-align: center;
    margin: 0;
    font-size: 2.2em;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    position: relative;
    z-index: 1;
}

/* Navigation */
.navbar {
    background: linear-gradient(135deg, #34495e 0%, #2c3e50 100%);
    padding: 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}

.navbar li {
    margin: 0;
    position: relative;
}

.navbar a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 18px 24px;
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.navbar a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left 0.5s;
}

.navbar a:hover::before {
    left: 100%;
}

.navbar a:hover {
    background: linear-gradient(135deg, #3498db, #2980b9);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.navbar a:active {
    transform: translateY(0);
}

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

/* Card */
.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    overflow: hidden;
}

.card-header {
    background-color: #3498db;
    color: white;
    padding: 15px 20px;
    font-weight: bold;
}

.card-body {
    padding: 20px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
    font-size: 0.95em;
    transition: color 0.3s ease;
}

.form-control {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e1e8ed;
    border-radius: 12px;
    font-size: 16px;
    background-color: #f8f9fa;
    transition: all 0.3s ease;
    outline: none;
}

.form-control:focus {
    border-color: #667eea;
    background-color: #fff;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

.form-control:hover {
    border-color: #c1c9d2;
    background-color: #fff;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 15px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

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

.btn-success {
    background-color: #27ae60;
}

.btn-success:hover {
    background-color: #229954;
}

.btn-danger {
    background-color: #e74c3c;
}

.btn-danger:hover {
    background-color: #c0392b;
}

.btn-warning {
    background-color: #f39c12;
}

.btn-warning:hover {
    background-color: #e67e22;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.table th,
.table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid #e8ecef;
}

.table th {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    font-weight: 600;
    color: #2c3e50;
    font-size: 0.95em;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
}

.table th::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.table tr {
    transition: all 0.3s ease;
}

.table tr:hover {
    background-color: #f8f9fa;
    transform: scale(1.01);
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.table tr:nth-child(even) {
    background-color: rgba(52, 152, 219, 0.02);
}

/* Alerts */
.alert {
    padding: 15px 20px;
    margin-bottom: 25px;
    border: none;
    border-radius: 12px;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.alert::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background-color: currentColor;
}

.alert-success {
    color: #155724;
    background: linear-gradient(135deg, #d4edda, #c3e6cb);
    border-left: 4px solid #28a745;
}

.alert-danger {
    color: #721c24;
    background: linear-gradient(135deg, #f8d7da, #f5c6cb);
    border-left: 4px solid #dc3545;
}

.alert-info {
    color: #0c5460;
    background: linear-gradient(135deg, #d1ecf1, #bee5eb);
    border-left: 4px solid #17a2b8;
}

/* Login Form */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 420px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.login-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px rgba(0,0,0,0.15);
}

.login-header {
    text-align: center;
    margin-bottom: 35px;
}

.login-header h2 {
    color: #2c3e50;
    font-size: 2.2em;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header p {
    color: #666;
    font-size: 1.1em;
    font-weight: 400;
}

/* Card */
.card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.08);
    margin-bottom: 25px;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.2);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.12);
}

.card-header {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: white;
    padding: 20px 25px;
    font-weight: 600;
    font-size: 1.1em;
    position: relative;
    overflow: hidden;
}

.card-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
    opacity: 0.3;
}

.card-header h3 {
    margin: 0;
    position: relative;
    z-index: 1;
}

.card-body {
    padding: 25px;
}

/* Dashboard Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 35px;
}

.stat-card {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: white;
    padding: 30px 25px;
    border-radius: 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid rgba(255,255,255,0.1);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    transform: rotate(45deg);
    transition: transform 0.6s ease;
}

.stat-card:hover::before {
    transform: rotate(45deg) scale(1.2);
}

.stat-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(52, 152, 219, 0.3);
}

.stat-number {
    font-size: 2.8em;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.stat-label {
    font-size: 1.1em;
    opacity: 0.95;
    font-weight: 500;
    position: relative;
    z-index: 1;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar ul {
        flex-direction: column;
    }
    
    .navbar a {
        padding: 15px 20px;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    
    .navbar a:hover {
        transform: none;
        box-shadow: none;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .header h1 {
        font-size: 1.8em;
    }
    
    .login-container {
        padding: 15px;
    }
    
    .login-card {
        padding: 30px 25px;
        border-radius: 16px;
    }
    
    .login-header h2 {
        font-size: 1.8em;
    }
    
    .table {
        font-size: 14px;
        overflow-x: auto;
        display: block;
        white-space: nowrap;
    }
    
    .table th,
    .table td {
        padding: 12px 15px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .stat-card {
        padding: 25px 20px;
    }
    
    .stat-number {
        font-size: 2.4em;
    }
    
    .card-body {
        padding: 20px;
    }
    
    .form-control {
        font-size: 16px; /* Prevents zoom on iOS */
    }
    
    .btn {
        padding: 12px 25px;
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 15px 0;
    }
    
    .header h1 {
        font-size: 1.5em;
    }
    
    .login-card {
        padding: 25px 20px;
    }
    
    .login-header h2 {
        font-size: 1.6em;
    }
    
    .stat-number {
        font-size: 2em;
    }
    
    .stat-label {
        font-size: 1em;
    }
    
    .navbar a {
        padding: 12px 15px;
        font-size: 14px;
    }
}

/* Print styles */
@media print {
    .navbar,
    .btn,
    .alert {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .stat-card {
        background: #f8f9fa !important;
        color: #333 !important;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn {
        border: 2px solid currentColor;
    }
    
    .card {
        border: 2px solid #333;
    }
    
    .table th {
        border: 2px solid #333;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}