/**
 * Construction Company Modern Theme
 * HRMIS - Human Resource Management Information System
 *
 * A modern, professional construction-themed design
 * Colors inspired by construction: Steel, Concrete, Safety Orange, Industrial Yellow
 *
 * @author HRMIS Development Team
 * @version 2.0.0
 * @since 2026-02-11
 */

/* ========== CSS VARIABLES - CONSTRUCTION THEME ========== */
:root {
    /* Primary Construction Colors */
    --construction-primary: #FFCD11;        /* Caterpillar Yellow */
    --construction-primary-dark: #E6B800;   /* Darker Yellow */
    --construction-primary-light: #FFD740;  /* Light Yellow */

    /* Industrial Grays */
    --construction-steel: #2C3E50;          /* Dark Steel Blue */
    --construction-concrete: #95A5A6;       /* Concrete Gray */
    --construction-metal: #34495E;          /* Metal Gray */
    --construction-charcoal: #1A252F;       /* Charcoal */

    /* Accent Colors */
    --construction-yellow: #F39C12;         /* Safety Yellow */
    --construction-yellow-light: #F9E79F;   /* Light Yellow */
    --construction-green: #27AE60;          /* Safety Green */
    --construction-red: #E74C3C;            /* Danger Red */

    /* Neutral Colors */
    --construction-white: #FFFFFF;
    --construction-offwhite: #F8F9FA;
    --construction-lightgray: #ECF0F1;
    --construction-darkgray: #7F8C8D;

    /* Semantic Colors */
    --color-success: #27AE60;
    --color-info: #3498DB;
    --color-warning: #F39C12;
    --color-danger: #E74C3C;

    /* Typography */
    --font-primary: 'Inter', 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Poppins', 'Inter', sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;

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

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.15);
    --shadow-xl: 0 12px 24px rgba(0,0,0,0.18);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ========== GLOBAL STYLES ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
    color: var(--construction-steel);
    line-height: 1.6;
    font-size: 15px;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
}

/* ========== HEADER FIX - ALIGN WITH SIDEBAR ========== */
.authenticated .app-container {
    display: grid;
    grid-template-areas:
        "sidebar header"
        "sidebar main";
    grid-template-columns: 260px 1fr;
    grid-template-rows: 70px 1fr;
    min-height: 100vh;
    gap: 0;
    margin: 0;
    padding: 0;
}

.app-header {
    grid-area: header;
    background: linear-gradient(135deg, var(--construction-charcoal) 0%, var(--construction-steel) 100%);
    border-bottom: 3px solid var(--construction-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    height: 70px;
    position: sticky;
    top: 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.header-title h1 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--construction-white);
    margin: 0;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-title h1::before {
    content: '🏗️';
    font-size: 1.6rem;
}

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

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

.icon-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--construction-white);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 1.2rem;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: var(--construction-primary);
    transform: translateY(-1px);
}

.user-menu-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    transition: var(--transition-fast);
    color: var(--construction-white);
}

.user-menu-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: var(--construction-primary);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--construction-primary);
}

.user-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.dropdown-arrow {
    font-size: 0.7rem;
    opacity: 0.7;
}

.user-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + var(--spacing-sm));
    right: 0;
    background: var(--construction-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    min-width: 200px;
    border: 1px solid var(--construction-lightgray);
    overflow: hidden;
    z-index: 1000;
}

.user-dropdown.show {
    display: block;
    animation: slideDown 0.2s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.user-dropdown a {
    display: block;
    padding: var(--spacing-md);
    color: var(--construction-steel);
    text-decoration: none;
    transition: var(--transition-fast);
    font-size: 0.9rem;
}

.user-dropdown a:hover {
    background: var(--construction-lightgray);
    color: var(--construction-primary);
}

.user-dropdown hr {
    margin: 0;
    border: none;
    border-top: 1px solid var(--construction-lightgray);
}

/* ========== TYPOGRAPHY ========== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--construction-charcoal);
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; letter-spacing: -0.5px; }
h2 { font-size: 2rem; letter-spacing: -0.3px; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; text-transform: uppercase; letter-spacing: 0.5px; }

/* ========== SIDEBAR ========== */
.app-sidebar {
    grid-area: sidebar;
    width: 260px;
    height: 100vh;
    position: sticky;
    top: 0;
    left: 0;
    background: linear-gradient(180deg, var(--construction-charcoal) 0%, var(--construction-steel) 100%);
    box-shadow: 4px 0 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    transition: all var(--transition-normal);
    overflow-y: auto;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
}

.app-sidebar::-webkit-scrollbar {
    width: 6px;
}

.app-sidebar::-webkit-scrollbar-thumb {
    background: var(--construction-primary);
    border-radius: 3px;
}

/* Sidebar Header */
.sidebar-header {
    padding: var(--spacing-lg) var(--spacing-md);
    border-bottom: 3px solid var(--construction-primary);
    background: rgba(0, 0, 0, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.sidebar-logo {
    width: 210px;
    height: auto;
    object-fit: contain;
    display: block;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    padding: 6px 10px;
}

.sidebar-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--construction-white);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-left: var(--spacing-sm);
}

.sidebar-title::after {
    content: '⚡';
    margin-left: var(--spacing-xs);
    color: var(--construction-yellow);
}

/* Navigation Sections */
.nav-section {
    padding: var(--spacing-md) 0;
}

.nav-section-title {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--construction-concrete);
    display: flex;
    align-items: center;
}

.nav-section-title::before {
    content: '';
    width: 3px;
    height: 14px;
    background: var(--construction-primary);
    margin-right: var(--spacing-sm);
    border-radius: 2px;
}

/* Navigation Menu */
.nav-menu {
    list-style: none;
}

.nav-item {
    position: relative;
    margin: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--construction-lightgray);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 0;
    background: var(--construction-primary);
    transition: width var(--transition-fast);
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.nav-link:hover {
    background: rgba(255, 205, 17, 0.1);
    color: var(--construction-white);
    padding-left: calc(var(--spacing-lg) + 8px);
}

.nav-link:hover::before {
    width: 4px;
}

.nav-item.active .nav-link {
    background: var(--construction-primary);
    color: var(--construction-white);
    font-weight: 600;
    box-shadow: var(--shadow-md);
}

.nav-icon {
    font-size: 1.3rem;
    margin-right: var(--spacing-md);
    min-width: 24px;
    text-align: center;
}

.nav-text {
    flex: 1;
}

.nav-badge {
    background: var(--construction-yellow);
    color: var(--construction-charcoal);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-left: var(--spacing-sm);
}

/* ========== HEADER ========== */
.app-header {
    height: 70px;
    background: var(--construction-white);
    border-bottom: 3px solid var(--construction-primary);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
    margin-left: 260px;
    position: sticky;
    top: 0;
    z-index: 999;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.header-title h1 {
    font-size: 1.75rem;
    color: var(--construction-steel);
    margin: 0;
    font-weight: 700;
}

.header-title h1::before {
    content: '▸';
    color: var(--construction-primary);
    margin-right: var(--spacing-sm);
    font-size: 1.5rem;
}

.sidebar-toggle {
    background: var(--construction-primary);
    border: none;
    width: 45px;
    height: 45px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: none; /* Hidden by default on desktop */
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.sidebar-toggle span {
    width: 22px;
    height: 3px;
    background: var(--construction-white);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--construction-primary-dark);
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

/* ========== SIDEBAR OVERLAY (GLOBAL) ========== */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1500;
    backdrop-filter: blur(2px);
    transition: opacity 0.3s ease;
}

.sidebar-overlay.show {
    display: block;
}

/* ========== MAIN CONTENT ========== */
.app-main {
    grid-area: main;
    min-height: calc(100vh - 70px);
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
    padding: 0;
    margin: 0;
    overflow-x: hidden;
}

.main-content {
    padding: 0;
    max-width: 100%;
    margin: 0;
}

/* ========== CARDS ========== */
.card, .content-card, .portal-card {
    background: var(--construction-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--construction-primary);
    transition: all var(--transition-fast);
    overflow: hidden;
}

.card:hover, .content-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

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

.card-header {
    padding: var(--spacing-lg) var(--spacing-xl);
    background: linear-gradient(135deg, var(--construction-offwhite) 0%, var(--construction-lightgray) 100%);
    border-bottom: 2px solid var(--construction-primary);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--construction-steel);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    margin: 0;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--construction-primary) 0%, var(--construction-primary-dark) 100%);
    color: var(--construction-charcoal);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--construction-primary-dark) 0%, #CCa800 100%);
}

.btn-secondary {
    background: var(--construction-steel);
    color: var(--construction-white);
}

.btn-success {
    background: var(--construction-green);
    color: var(--construction-white);
}

.btn-warning {
    background: var(--construction-yellow);
    color: var(--construction-charcoal);
}

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

.btn-outline-primary {
    background: transparent;
    color: var(--construction-primary);
    border: 2px solid var(--construction-primary);
}

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

/* Button Group */
.btn-group {
    display: inline-flex;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.btn-group .btn {
    border-radius: 0;
    margin: 0;
    border-right: 1px solid rgba(255,255,255,0.2);
}

.btn-group .btn:first-child {
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.btn-group .btn:last-child {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    border-right: none;
}

/* ========== BADGES ========== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background: var(--construction-primary);
    color: var(--construction-charcoal);
}

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

.badge-warning {
    background: var(--construction-yellow);
    color: var(--construction-charcoal);
}

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

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

/* ========== TABLES ========== */
.table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: var(--spacing-md) 0;
}

.table thead {
    background: linear-gradient(135deg, var(--construction-steel) 0%, var(--construction-metal) 100%);
    color: var(--construction-white);
}

.table th {
    padding: var(--spacing-lg);
    text-align: left;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.85rem;
    border-bottom: 3px solid var(--construction-primary);
}

.table th:first-child {
    border-radius: var(--radius-md) 0 0 0;
}

.table th:last-child {
    border-radius: 0 var(--radius-md) 0 0;
}

.table td {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--construction-lightgray);
    background: var(--construction-white);
}

.table tbody tr {
    transition: all var(--transition-fast);
}

.table tbody tr:hover {
    background: var(--construction-offwhite);
    box-shadow: inset 4px 0 0 var(--construction-primary);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* ========== FORMS ========== */
.form-control,
.form-select {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    color: var(--construction-steel);
    background: var(--construction-white);
    border: 2px solid var(--construction-lightgray);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-control:focus,
.form-select:focus {
    outline: none;
    border-color: var(--construction-primary);
    box-shadow: 0 0 0 3px rgba(255, 205, 17, 0.1);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--construction-steel);
    font-size: 0.9rem;
}

/* ========== STATS CARDS ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
}

.stat-card {
    background: linear-gradient(135deg, var(--construction-white) 0%, var(--construction-offwhite) 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border-left: 5px solid var(--construction-primary);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(255,205,17,0.05) 0%, transparent 70%);
    border-radius: 50%;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--construction-primary) 0%, var(--construction-primary-dark) 100%);
    box-shadow: var(--shadow-sm);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--construction-steel);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--construction-darkgray);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ========== ALERTS ========== */
.alert {
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 5px solid;
    margin: var(--spacing-md) 0;
    font-weight: 500;
}

.alert-success {
    background: rgba(39, 174, 96, 0.1);
    border-color: var(--construction-green);
    color: var(--construction-green);
}

.alert-warning {
    background: rgba(243, 156, 18, 0.1);
    border-color: var(--construction-yellow);
    color: #C87F0A;
}

.alert-danger {
    background: rgba(231, 76, 60, 0.1);
    border-color: var(--construction-red);
    color: var(--construction-red);
}

.alert-info {
    background: rgba(52, 152, 219, 0.1);
    border-color: var(--color-info);
    color: var(--color-info);
}

/* ========== MODAL ========== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 37, 47, 0.85);
    backdrop-filter: blur(4px);
    z-index: 9998;
}

.modal-dialog {
    position: relative;
    z-index: 9999;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-content {
    background: var(--construction-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border-top: 5px solid var(--construction-primary);
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 2px solid var(--construction-lightgray);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--construction-offwhite) 0%, var(--construction-lightgray) 100%);
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--construction-steel);
    margin: 0;
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-footer {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 2px solid var(--construction-lightgray);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    background: var(--construction-offwhite);
}

/* ========== CONSTRUCTION-SPECIFIC ELEMENTS ========== */
.construction-header {
    background: linear-gradient(135deg, var(--construction-steel) 0%, var(--construction-charcoal) 100%);
    color: var(--construction-white);
    padding: var(--spacing-xxl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xxl);
    position: relative;
    overflow: hidden;
}

.construction-header::before {
    content: '⚙';
    position: absolute;
    font-size: 15rem;
    opacity: 0.05;
    right: -3rem;
    top: -3rem;
    transform: rotate(-15deg);
}

/* Hard Hat Icon */
.hardhat-icon::before {
    content: '⛑';
    margin-right: var(--spacing-sm);
}

/* Crane Icon */
.crane-icon::before {
    content: '🏗️';
    margin-right: var(--spacing-sm);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
    /* Make sidebar hidden by default on mobile */
    .app-sidebar {
        position: fixed;
        left: -260px;
        top: 0;
        height: 100vh;
        z-index: 2000;
        transition: left 0.3s ease;
    }

    /* Show sidebar when toggled */
    .app-sidebar.show,
    .app-sidebar.open {
        left: 0;
    }

    /* Remove grid layout on mobile */
    .authenticated .app-container {
        display: block;
    }

    .app-header,
    .app-main {
        margin-left: 0;
        width: 100%;
    }

    /* Show toggle button on mobile */
    .sidebar-toggle {
        display: flex !important;
    }

    /* Sidebar overlay for mobile */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 1500;
        backdrop-filter: blur(2px);
    }

    .sidebar-overlay.show {
        display: block;
    }

    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: var(--spacing-lg);
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }

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

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

/* ========== UTILITY CLASSES ========== */
.text-primary { color: var(--construction-primary) !important; }
.text-success { color: var(--construction-green) !important; }
.text-warning { color: var(--construction-yellow) !important; }
.text-danger { color: var(--construction-red) !important; }
.text-muted { color: var(--construction-darkgray) !important; }

.bg-primary { background: var(--construction-primary) !important; }
.bg-success { background: var(--construction-green) !important; }
.bg-warning { background: var(--construction-yellow) !important; }
.bg-danger { background: var(--construction-red) !important; }

.fw-bold { font-weight: 700 !important; }
.fw-normal { font-weight: 400 !important; }

.text-center { text-align: center !important; }
.text-left { text-align: left !important; }
.text-right { text-align: right !important; }

/* ========== ANIMATIONS ========== */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.animate-slide-in {
    animation: slideInRight 0.5s ease;
}

.animate-fade-in {
    animation: fadeIn 0.3s ease;
}

/* ========== LOADING STATES ========== */
.spinner-border {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--construction-lightgray);
    border-right-color: var(--construction-primary);
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--construction-lightgray);
}

::-webkit-scrollbar-thumb {
    background: var(--construction-primary);
    border-radius: 6px;
    border: 3px solid var(--construction-lightgray);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--construction-primary-dark);
}