:root {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-card: #252525;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-color: #00d4ff;
    --accent-hover: #00b8d4;
    --danger-color: #ff4d4d;
    --success-color: #00e676;
    --border-color: #333;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

[data-theme="light"] {
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --accent-color: #007bff;
    --accent-hover: #0056b3;
    --border-color: #dee2e6;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s, color 0.3s;
}

h1,
h2,
h3,
h4,
h5,
h6,
.h1,
.h2,
.h3,
.h4,
.h5,
.h6 {
    margin-bottom: 1rem;
    font-weight: 600;
    color: var(--text-primary) !important;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-hover);
}

.container {
    padding: 0 20px;
    margin: 0 auto;
    max-width: 1200px;
    width: 100%;
}

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

.btn-primary {
    background-color: var(--accent-color);
    color: #121212;
    /* Dark text on bright accent usually looks better */
}

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

.form-group {
    margin-bottom: 1.5rem;
}

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

.form-control {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
}

.card {
    background-color: var(--bg-card);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
    overflow: hidden;
}

.card-header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    margin: -1.5rem -1.5rem 1.5rem -1.5rem;
    color: var(--text-primary);
}

.card-header h1,
.card-header h2,
.card-header h3,
.card-header h4,
.card-header h5,
.card-header h6 {
    margin-bottom: 0;
    color: var(--text-primary);
}

/* Alerts - Standardized Colors */
.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    border: 1px solid transparent;
}

/* Error - Red */
.alert-danger {
    background-color: rgba(255, 77, 77, 0.1);
    color: #ff4d4d;
    border-color: rgba(255, 77, 77, 0.3);
}

/* Warning/Info - Yellow */
.alert-warning,
.alert-info {
    background-color: rgba(255, 193, 7, 0.1);
    color: #ffc107;
    border-color: rgba(255, 193, 7, 0.3);
}

/* Success - Green */
.alert-success {
    background-color: rgba(0, 230, 118, 0.1);
    color: #00e676;
    border-color: rgba(0, 230, 118, 0.3);
}

.input-group-text {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
}

.login-card {
    width: 100%;
    max-width: 400px;
}

/* Page Header & Utils */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .page-header {
        flex-direction: column;
        align-items: stretch;
    }

    .page-header .d-flex {
        flex-direction: column;
        width: 100%;
    }

    .page-header .form-control {
        width: 100% !important;
    }
}

/* Navbar */
.navbar {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    margin-bottom: 2rem;
}

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

.nav-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-link {
    color: var(--text-secondary);
}

.nav-link:hover {
    color: var(--accent-color);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--bg-card);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.stat-title {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.stat-value.long-number {
    font-size: 1.5rem;
}

@media (max-width: 1400px) {
    .stat-value {
        font-size: 1.5rem;
    }

    .stat-value.long-number {
        font-size: 1.25rem;
    }
}

/* Tables */
.table-container {
    overflow-x: auto;
}


table {
    width: 100%;
    border-collapse: collapse;
    color: var(--text-primary);
}

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

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

td strong {
    color: var(--text-primary);
}


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

.btn-secondary:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

tr {
    transition: background-color 0.2s;
}

tr:hover {
    background-color: rgba(128, 128, 128, 0.1);
}

/* Ensure table rows are transparent or inherit card bg */
.table,
.table tr,
.table td,
.table th,
table,
table tr,
table td,
table th,
.table>:not(caption)>*>* {
    background-color: transparent !important;
    color: var(--text-primary) !important;
    border-color: var(--border-color) !important;
    box-shadow: none !important;
}

.card h1,
.card h2,
.card h3,
.card h4,
.card h5,
.card h6 {
    color: var(--text-primary) !important;
}

/* Progress bar contrast */
.progress-container {
    background-color: var(--bg-secondary);
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
}

/* Print optimizations */
@media print {

    .navbar,
    .btn,
    form {
        display: none !important;
    }

    .card {
        box-shadow: none !important;
        border: 1px solid #ccc !important;
    }
}