/* Dark/Light Theme Styles */
:root {
    --bg-color: #ffffff;
    --text-color: #212529;
    --card-bg: #ffffff;
    --border-color: #dee2e6;
    --input-bg: #ffffff;
    --input-border: #ced4da;
    --shadow: rgba(0, 0, 0, 0.1);
}

.dark-theme {
    --bg-color: #121212;
    --text-color: #ffffff;
    --card-bg: #1e1e1e;
    --border-color: #333333;
    --input-bg: #2a2a2a;
    --input-border: #444444;
    --shadow: rgba(0, 0, 0, 0.5);
    --text-muted: #b0b0b0;
    --table-hover: #2a2a2a;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 14px;
    line-height: 1.6;
}

.dark-theme body {
    color: #ffffff;
    font-weight: 400;
}

.dark-theme h1, .dark-theme h2, .dark-theme h3, .dark-theme h4, .dark-theme h5, .dark-theme h6 {
    color: #ffffff;
    font-weight: 600;
}

.dark-theme .text-muted {
    color: var(--text-muted) !important;
}

/* Cards */
.card {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    box-shadow: 0 2px 4px var(--shadow);
    transition: all 0.3s ease;
}

.dark-theme .card {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: #ffffff;
}

.dark-theme .card-header {
    background-color: #2a2a2a;
    border-bottom-color: #444444;
    color: #ffffff;
}

.dark-theme .card-body {
    color: #ffffff;
}

.card:hover {
    box-shadow: 0 4px 8px var(--shadow);
}

.stat-card {
    border-left: 4px solid #0d6efd;
}

.stat-icon {
    font-size: 2.5rem;
    color: #0d6efd;
    opacity: 0.7;
}

/* Forms */
.form-control,
.form-select {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-color);
    transition: all 0.3s ease;
}

.form-control:focus,
.form-select:focus {
    background-color: var(--input-bg);
    border-color: #0d6efd;
    color: var(--text-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.form-label {
    color: var(--text-color);
    font-weight: 500;
}

.dark-theme .form-label {
    color: #ffffff;
    font-weight: 500;
}

.dark-theme .form-control,
.dark-theme .form-select {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: #ffffff;
}

.dark-theme .form-control::placeholder,
.dark-theme .form-select::placeholder {
    color: #888888;
    opacity: 1;
}

.dark-theme .form-control:focus,
.dark-theme .form-select:focus {
    background-color: var(--input-bg);
    border-color: #0d6efd;
    color: #ffffff;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

/* Tables */
.table {
    color: var(--text-color);
    background-color: var(--card-bg);
}

.dark-theme .table {
    color: #ffffff;
    background-color: var(--card-bg);
}

.dark-theme .table thead th {
    color: #ffffff;
    background-color: #2a2a2a;
    border-color: #444444;
    font-weight: 600;
}

.dark-theme .table tbody td {
    color: #ffffff;
    border-color: #333333;
}

.dark-theme .table-hover tbody tr:hover {
    background-color: var(--table-hover);
    color: #ffffff;
}

.dark-theme .table-striped > tbody > tr:nth-of-type(odd) > td {
    background-color: #252525;
    color: #ffffff;
}

/* Login Page */
.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-color: var(--card-bg);
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 10px 30px var(--shadow);
    width: 100%;
    max-width: 400px;
}

/* Navbar */
.navbar {
    box-shadow: 0 2px 4px var(--shadow);
}

/* Buttons */
.btn {
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow);
}

/* Alerts */
.alert {
    border: none;
    border-radius: 8px;
}

/* Footer */
footer {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

/* Responsive Design */
@media (max-width: 768px) {
    .login-card {
        padding: 30px 20px;
    }
    
    .stat-card .stat-icon {
        font-size: 2rem;
    }
    
    .table-responsive {
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    h2 {
        font-size: 1.5rem;
    }
    
    .card-body {
        padding: 1rem;
    }
}

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

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

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Print Styles */
@media print {
    .navbar,
    footer,
    .btn,
    .pagination {
        display: none !important;
    }
    
    .card {
        border: 1px solid #000;
        page-break-inside: avoid;
    }
}