/**
 * Integral Safety Training LMS
 * Main Stylesheet
 */

/* ============================================
   CSS Variables
   ============================================ */
:root {
    /* Colors */
    --color-primary: #1a5f7a;
    --color-primary-dark: #134a5e;
    --color-primary-light: #2a7f9a;
    --color-secondary: #57837b;
    --color-accent: #c38154;

    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    --color-info: #17a2b8;

    --color-text: #333333;
    --color-text-muted: #6c757d;
    --color-text-light: #999999;

    --color-bg: #f8f9fa;
    --color-bg-white: #ffffff;
    --color-bg-dark: #343a40;

    --color-border: #dee2e6;
    --color-border-light: #e9ecef;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-family-mono: "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;

    /* Layout */
    --header-height: 60px;
    --sidebar-width: 250px;
    --container-max: 1200px;

    /* Additional colors for theming */
    --color-bg-secondary: #f1f3f4;
    --color-bg-tertiary: #e8eaed;
    --color-input-bg: #ffffff;
    --color-card-bg: #ffffff;
    --color-header-bg: #ffffff;
}

/* Dark Theme */
[data-theme="dark"] {
    --color-primary: #4db8d8;
    --color-primary-dark: #3a9ab8;
    --color-primary-light: #6fc8e8;
    --color-secondary: #7aa89e;
    --color-accent: #d4a574;

    --color-success: #48c774;
    --color-warning: #ffdd57;
    --color-danger: #f14668;
    --color-info: #3298dc;

    --color-text: #e8e8e8;
    --color-text-muted: #a0a0a0;
    --color-text-light: #888888;

    --color-bg: #1a1a2e;
    --color-bg-white: #16213e;
    --color-bg-dark: #0f0f1a;
    --color-bg-secondary: #1f2942;
    --color-bg-tertiary: #283553;

    --color-border: #3a4a6b;
    --color-border-light: #2a3a5b;

    --color-input-bg: #1f2942;
    --color-card-bg: #16213e;
    --color-header-bg: #16213e;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
}

/* Theme-based logo visibility */
.logo .logo-light,
.auth-header .logo-light { display: inline-block !important; }

.logo .logo-dark,
.auth-header .logo-dark { display: none !important; }

[data-theme="dark"] .logo .logo-light,
[data-theme="dark"] .auth-header .logo-light { display: none !important; }

[data-theme="dark"] .logo .logo-dark,
[data-theme="dark"] .auth-header .logo-dark { display: inline-block !important; }

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    line-height: 1.5;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
}

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

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-md);
}

hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--spacing-lg) 0;
}

/* ============================================
   Layout - Auth
   ============================================ */
.layout-auth {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: var(--spacing-lg);
}

.auth-container {
    width: 100%;
    max-width: 400px;
}

.auth-card {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xl);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-logo {
    max-width: 120px;
    margin-bottom: var(--spacing-md);
}

.auth-header h1 {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
}

.auth-intro {
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.auth-form .form-group {
    margin-bottom: var(--spacing-md);
}

.auth-links {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.auth-footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
}

/* ============================================
   Layout - Main
   ============================================ */
.layout-main {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-header {
    background: var(--color-bg-white);
    border-bottom: 1px solid var(--color-border);
    height: var(--header-height);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
}

.logo img {
    height: 36px;
}

.main-nav {
    display: flex;
    gap: var(--spacing-md);
    flex: 1;
}

.main-nav a {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--color-text);
    text-decoration: none;
    transition: background var(--transition-fast);
}

.main-nav a:hover {
    background: var(--color-bg);
    text-decoration: none;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-name {
    font-weight: 500;
}

.user-role {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.main-content {
    flex: 1;
    padding: var(--spacing-xl) 0;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.main-footer {
    background: var(--color-bg-white);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ============================================
   Dropdown
   ============================================ */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    background: none;
    border: none;
    padding: var(--spacing-sm);
    cursor: pointer;
    border-radius: var(--radius-md);
    color: var(--color-text);
}

.dropdown-toggle:hover {
    background: var(--color-bg);
}

.dropdown-menu {
    position: absolute;
    right: 0;
    top: 100%;
    min-width: 180px;
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 1001;
}

.dropdown:hover .dropdown-menu,
.dropdown-toggle:focus + .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
    text-decoration: none;
}

.dropdown-menu a:hover {
    background: var(--color-bg);
}

.dropdown-menu hr {
    margin: var(--spacing-xs) 0;
}

/* ============================================
   Page Header
   ============================================ */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.page-header h1 {
    margin: 0;
}

.page-subtitle {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1.5;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.btn:hover {
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: white;
}

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

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

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

.btn-danger:hover {
    background: #c82333;
    color: white;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ============================================
   Forms
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-input-bg, var(--color-bg-white));
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26, 95, 122, 0.1);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.form-help {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.form-control-disabled {
    background-color: var(--color-bg);
    cursor: not-allowed;
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* ============================================
   Alerts
   ============================================ */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.alert-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    opacity: 0.5;
    line-height: 1;
}

.alert-close:hover {
    opacity: 1;
}

/* ============================================
   Cards
   ============================================ */
.card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.card-header h2 {
    margin: 0;
    font-size: var(--font-size-lg);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-warning {
    border-color: var(--color-warning);
}

.card-warning .card-header {
    background: #fff3cd;
}

/* ============================================
   Stats Grid
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stats-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.stat-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

.stat-link {
    display: inline-block;
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

/* ============================================
   Dashboard Grid
   ============================================ */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Quick Actions
   ============================================ */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
}

.quick-action {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.quick-action:hover {
    background: var(--color-primary);
    color: white;
    text-decoration: none;
}

.quick-action-icon {
    font-size: var(--font-size-2xl);
    line-height: 1;
}

/* ============================================
   Tables
   ============================================ */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.table th {
    font-weight: 600;
    background: var(--color-bg);
}

.table tbody tr:hover {
    background: var(--color-bg);
}

.table-compact th,
.table-compact td {
    padding: var(--spacing-xs) var(--spacing-sm);
}

/* ============================================
   Badge
   ============================================ */
.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
    background: var(--color-bg);
}

.badge-success {
    background: var(--color-success);
    color: white;
}

.badge-warning {
    background: var(--color-warning);
    color: #333;
}

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

.badge-secondary {
    background: var(--color-text-muted);
    color: white;
}

/* ============================================
   Progress Bar
   ============================================ */
.progress-bar {
    position: relative;
    height: 20px;
    background: var(--color-bg);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.progress-bar-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* ============================================
   Course Grid
   ============================================ */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.course-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
}

.course-card-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.course-card-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
}

.course-card-body {
    padding: var(--spacing-md);
    flex: 1;
}

.course-card-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

/* ============================================
   Status List
   ============================================ */
.status-list {
    list-style: none;
}

.status-list li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
}

.status-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-text-muted);
}

.status-ok::before {
    background: var(--color-success);
}

.status-warning::before {
    background: var(--color-warning);
}

.status-error::before {
    background: var(--color-danger);
}

/* ============================================
   Empty State
   ============================================ */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-muted);
}

/* ============================================
   Utilities
   ============================================ */
.text-muted {
    color: var(--color-text-muted);
}

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

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .header-container {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }

    .main-nav {
        order: 3;
        width: 100%;
        overflow-x: auto;
        padding: var(--spacing-sm) 0;
    }

    .stats-grid,
    .stats-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .form-actions {
        flex-direction: column;
    }

    .table {
        display: block;
        overflow-x: auto;
    }
}

@media (max-width: 480px) {
    .stats-grid,
    .stats-grid-4 {
        grid-template-columns: 1fr;
    }

    .course-grid {
        grid-template-columns: 1fr;
    }
}