/**
 * ODL LMS - Main Stylesheet
 * University ERP Design System
 */

:root {
    --primary: #1e3a5f;
    --primary-dark: #152a45;
    --primary-light: #2a5082;
    --secondary: #c9a227;
    --secondary-dark: #a88620;
    --body-bg: #f0f2f5;
    --card-bg: #ffffff;
    --sidebar-bg: #1e3a5f;
    --sidebar-width: 260px;
    --sidebar-collapsed: 70px;
    --navbar-height: 60px;
    --text-primary: #1a1a2e;
    --text-secondary: #6c757d;
    --border-color: #e9ecef;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --transition: 0.25s ease;
}

/* Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--text-primary);
    background-color: var(--body-bg);
    line-height: 1.6;
    margin: 0;
}

a {
    text-decoration: none;
    color: var(--primary);
    transition: color var(--transition);
}

a:hover {
    color: var(--primary-light);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    text-align: center;
}

.loading-text {
    color: #fff;
    font-size: 0.95rem;
}

/* Error Pages */
.error-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--body-bg);
}

.error-container {
    padding: 2rem;
}

.error-code {
    font-size: 6rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.error-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.error-message {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

/* Cards */
.card {
    border: none;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

/* Form Controls */
.form-control:focus,
.form-select:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 0.2rem rgba(30, 58, 95, 0.15);
}

/* Toast Overrides */
.toast {
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}

/* Utility */
.text-primary-custom {
    color: var(--primary) !important;
}

.bg-primary-custom {
    background-color: var(--primary) !important;
}