/**
 * Custom Styles - School Manager
 * Modern Clean Design with Monochrome Theme
 * Following SOLID Principles
 * Version: 2.0.0
 */

/* ===================================
   CSS VARIABLES - Single Source of Truth
   =================================== */
:root {
    /* True Monochrome Color Palette - Black, White, Grays */
    --color-primary: #000000;
    --color-primary-dark: #000000;
    --color-primary-light: #2d3748;
    
    --color-accent: #4a5568;
    --color-accent-light: #718096;
    --color-accent-lighter: #a0aec0;
    
    --color-bg-primary: #f7fafc;
    --color-bg-secondary: #edf2f7;
    --color-bg-tertiary: #e2e8f0;
    
    --color-text-primary: #1a202c;
    --color-text-secondary: #4a5568;
    --color-text-muted: #718096;
    
    --color-border: #e2e8f0;
    --color-border-dark: #cbd5e0;
    
    --color-white: #ffffff;
    --color-black: #000000;
    
    /* Semantic Colors */
    --color-success: #48bb78;
    --color-success-light: #c6f6d5;
    --color-warning: #ed8936;
    --color-warning-light: #fbd38d;
    --color-danger: #f56565;
    --color-danger-light: #fed7d7;
    --color-info: #4299e1;
    --color-info-light: #bee3f8;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-heading: "Inter", var(--font-primary);
    --font-mono: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    
    /* Font Sizes - Scaled to 85% for more compact UI */
    --text-xs: 0.6375rem;
    --text-sm: 0.74375rem;
    --text-base: 0.85rem;
    --text-lg: 0.95625rem;
    --text-xl: 1.0625rem;
    --text-2xl: 1.275rem;
    --text-3xl: 1.59375rem;
    --text-4xl: 1.9125rem;
    
    /* Spacing - Scaled to 85% for more compact UI */
    --spacing-1: 0.2125rem;
    --spacing-2: 0.425rem;
    --spacing-3: 0.6375rem;
    --spacing-4: 0.85rem;
    --spacing-5: 1.0625rem;
    --spacing-6: 1.275rem;
    --spacing-8: 1.7rem;
    --spacing-10: 2.125rem;
    --spacing-12: 2.55rem;
    --spacing-16: 3.4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-primary);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Scale Bootstrap components for compact UI */
.btn, .form-control, .form-select, input, textarea, select {
    font-size: var(--text-sm) !important;
}

.btn {
    padding: 0.5rem 0.9rem !important;
}

.btn-sm {
    padding: 0.35rem 0.65rem !important;
    font-size: var(--text-xs) !important;
}

.btn-lg {
    padding: 0.7rem 1.2rem !important;
    font-size: var(--text-base) !important;
}

.card {
    font-size: var(--text-sm);
}

.card-header {
    padding: 0.7rem 1rem !important;
}

.card-body {
    padding: 1rem !important;
}

.table {
    font-size: var(--text-sm) !important;
}

.table th, .table td {
    padding: 0.6rem 0.75rem !important;
}

.badge {
    font-size: 0.7rem !important;
    padding: 0.3rem 0.6rem !important;
}

.alert {
    padding: 0.85rem 1rem !important;
    font-size: var(--text-sm) !important;
}

.modal-header, .modal-footer {
    padding: 0.85rem 1rem !important;
}

.modal-body {
    padding: 1rem !important;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ===================================
   TYPOGRAPHY
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-4);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
    margin-bottom: var(--spacing-4);
    color: var(--color-text-secondary);
}

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

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

/* ===================================
   LAYOUT
   =================================== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

main {
    flex: 1;
    padding: var(--spacing-8) 0;
}

/* ===================================
   NAVIGATION - Modern Design
   =================================== */
.navbar {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-4) 0;
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 10000 !important;
}

.navbar-brand {
    font-weight: 700;
    font-size: var(--text-xl);
    color: var(--color-white) !important;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.navbar-brand i {
    font-size: var(--text-2xl);
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.8) !important;
    margin: 0 var(--spacing-2);
    transition: all var(--transition-fast);
    font-weight: 500;
    position: relative;
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
}

.navbar-nav .nav-link:hover {
    color: var(--color-white) !important;
    background: rgba(255, 255, 255, 0.1);
}

.navbar-nav .nav-link.active {
    color: var(--color-white) !important;
    background: rgba(255, 255, 255, 0.15);
}

.navbar-nav .nav-link i {
    margin-right: var(--spacing-1);
}

/* Dropdown Menu */
.dropdown-menu {
    border: none;
    box-shadow: var(--shadow-xl);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2);
    margin-top: var(--spacing-2);
    animation: slideDown 0.2s ease-out;
    z-index: 10000 !important;
    position: absolute !important;
}

/* Navbar dropdown needs higher z-index than cards */
.navbar .dropdown-menu {
    z-index: 10000 !important;
}

.navbar .dropdown {
    position: relative;
    z-index: 10000 !important;
}

.navbar .nav-item.dropdown {
    z-index: 10000 !important;
}

/* Ensure dropdown stays above everything */
.navbar .dropdown.show {
    z-index: 10000 !important;
}

.navbar .dropdown-toggle {
    z-index: 10000 !important;
}

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

.dropdown-item {
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    border-radius: var(--radius-md);
    padding: var(--spacing-2) var(--spacing-3);
    font-weight: 500;
}

.dropdown-item:hover {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

.dropdown-divider {
    margin: var(--spacing-2) 0;
    border-top: 1px solid var(--color-border);
}

/* ===================================
   CARDS - Modern Design
   =================================== */
.card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    overflow: visible;
    position: relative;
    z-index: 1;
}

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

.card-header {
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-5) var(--spacing-6);
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: var(--text-lg);
}

.card-body {
    padding: var(--spacing-6);
}

.card-footer {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-4) var(--spacing-6);
}

/* Stat Cards */
.stat-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.stat-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.stat-card .stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
    margin-bottom: var(--spacing-4);
}

.stat-card.stat-primary .stat-icon {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
}

.stat-card.stat-success .stat-icon {
    background: linear-gradient(135deg, var(--color-success) 0%, #38a169 100%);
    color: var(--color-white);
}

.stat-card.stat-warning .stat-icon {
    background: linear-gradient(135deg, var(--color-warning) 0%, #dd6b20 100%);
    color: var(--color-white);
}

.stat-card.stat-info .stat-icon {
    background: linear-gradient(135deg, var(--color-info) 0%, #3182ce 100%);
    color: var(--color-white);
}

.stat-card .stat-value {
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-2);
}

.stat-card .stat-label {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===================================
   FORMS - Modern Design
   =================================== */
.form-label {
    display: block;
    margin-bottom: var(--spacing-2);
    color: var(--color-text-primary);
    font-weight: 600;
    font-size: var(--text-sm);
}

.form-control {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-white);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-control:focus {
    border-color: var(--color-accent);
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 85, 104, 0.1);
}

.form-control:disabled {
    background-color: var(--color-bg-secondary);
    cursor: not-allowed;
    opacity: 0.6;
}

.form-control.is-invalid {
    border-color: var(--color-danger);
}

.form-control.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(245, 101, 101, 0.1);
}

.form-control.is-valid {
    border-color: var(--color-success);
}

.form-control.is-valid:focus {
    box-shadow: 0 0 0 3px rgba(72, 187, 120, 0.1);
}

.form-text {
    margin-top: var(--spacing-2);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.invalid-feedback {
    display: block;
    margin-top: var(--spacing-2);
    font-size: var(--text-sm);
    color: var(--color-danger);
}

.valid-feedback {
    display: block;
    margin-top: var(--spacing-2);
    font-size: var(--text-sm);
    color: var(--color-success);
}

/* Form Check */
.form-check {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-3);
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    margin-right: var(--spacing-2);
    border: 2px solid var(--color-border);
    cursor: pointer;
}

.form-check-input:checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.form-check-label {
    cursor: pointer;
    user-select: none;
}

/* Input Group */
.input-group {
    display: flex;
    width: 100%;
}

.input-group .form-control {
    flex: 1;
}

.input-group-text {
    padding: var(--spacing-3) var(--spacing-4);
    background-color: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
}

/* ===================================
   BUTTONS - Modern Design
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--text-base);
    font-weight: 600;
    line-height: 1.5;
    text-align: center;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
    text-decoration: none;
    user-select: none;
}

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

.btn i {
    font-size: 1.1em;
}

/* Primary Button */
.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

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

/* Secondary Button */
.btn-secondary {
    background-color: var(--color-accent);
    color: var(--color-white);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-accent-light);
}

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

.btn-outline-primary:hover:not(:disabled) {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn-outline-secondary {
    background-color: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.btn-outline-secondary:hover:not(:disabled) {
    background-color: var(--color-accent);
    color: var(--color-white);
}

/* Success/Warning/Danger Buttons */
.btn-success {
    background-color: var(--color-success);
    color: var(--color-white);
}

.btn-success:hover:not(:disabled) {
    background-color: #38a169;
    box-shadow: var(--shadow-md);
}

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

.btn-warning:hover:not(:disabled) {
    background-color: #dd6b20;
    box-shadow: var(--shadow-md);
}

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

.btn-danger:hover:not(:disabled) {
    background-color: #e53e3e;
    box-shadow: var(--shadow-md);
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--text-sm);
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--text-lg);
}

/* Button Link */
.btn-link {
    background: none;
    border: none;
    color: var(--color-accent);
    padding: 0;
}

.btn-link:hover {
    color: var(--color-accent-light);
    text-decoration: underline;
}

/* ===================================
   ALERTS
   =================================== */
.alert {
    padding: var(--spacing-4) var(--spacing-5);
    margin-bottom: var(--spacing-4);
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
}

.alert i {
    font-size: var(--text-xl);
    margin-top: 2px;
}

.alert-success {
    background-color: var(--color-success-light);
    border-color: var(--color-success);
    color: #22543d;
}

.alert-warning {
    background-color: var(--color-warning-light);
    border-color: var(--color-warning);
    color: #7c2d12;
}

.alert-danger {
    background-color: var(--color-danger-light);
    border-color: var(--color-danger);
    color: #742a2a;
}

.alert-info {
    background-color: var(--color-info-light);
    border-color: var(--color-info);
    color: #2c5282;
}

.alert-dismissible {
    padding-right: var(--spacing-10);
    position: relative;
}

.btn-close {
    position: absolute;
    right: var(--spacing-3);
    top: var(--spacing-3);
    background: none;
    border: none;
    font-size: var(--text-xl);
    cursor: pointer;
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

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

/* ===================================
   AUTH PAGES - Modern Design
   =================================== */
.auth-container {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-8) var(--spacing-4);
}

.auth-card {
    width: 100%;
    max-width: 480px;
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
}

.auth-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    padding: var(--spacing-8) var(--spacing-6);
    text-align: center;
    color: var(--color-white);
}

.auth-header h1 {
    color: var(--color-white);
    margin-bottom: var(--spacing-2);
    font-size: var(--text-3xl);
}

.auth-header p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0;
}

.auth-body {
    padding: var(--spacing-8) var(--spacing-6);
}

.auth-footer {
    padding: var(--spacing-4) var(--spacing-6);
    background-color: var(--color-bg-secondary);
    text-align: center;
    border-top: 1px solid var(--color-border);
}

/* ===================================
   REGISTRATION FORM - Multi-Step
   =================================== */
.registration-wizard {
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.step-wizard {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-6);
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
    border-bottom: 1px solid var(--color-border);
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    position: relative;
}

.step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 25px;
    left: 60%;
    width: 80%;
    height: 2px;
    background-color: var(--color-border);
    z-index: 0;
}

.step.active:not(:last-child)::after,
.step.completed:not(:last-child)::after {
    background-color: var(--color-primary);
}

.step-number {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background-color: var(--color-white);
    border: 3px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    transition: all var(--transition-base);
    position: relative;
    z-index: 1;
}

.step.active .step-number {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-color: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 0 0 4px rgba(26, 26, 46, 0.1);
}

.step.completed .step-number {
    background-color: var(--color-success);
    border-color: var(--color-success);
    color: var(--color-white);
}

.step-label {
    margin-top: var(--spacing-2);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-muted);
    text-align: center;
}

.step.active .step-label {
    color: var(--color-primary);
}

.step.completed .step-label {
    color: var(--color-success);
}

.form-step {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.form-step.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ===================================
   DASHBOARD - Modern Design
   =================================== */
.dashboard-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    padding: var(--spacing-8) 0;
    margin-bottom: var(--spacing-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.dashboard-header h1 {
    color: var(--color-white);
    margin-bottom: var(--spacing-2);
}

.dashboard-header p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
}

.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-8);
}

.quick-action-card {
    background: var(--color-white);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-5);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
}

.quick-action-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.quick-action-card i {
    font-size: var(--text-4xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-3);
}

.quick-action-card h5 {
    margin-bottom: var(--spacing-2);
    color: var(--color-text-primary);
}

.quick-action-card p {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    margin-bottom: 0;
}

/* ===================================
   PROFILE & SETTINGS PAGES
   =================================== */
.profile-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-6);
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-full);
    background: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-4xl);
    color: var(--color-primary);
    border: 4px solid rgba(255, 255, 255, 0.3);
}

.profile-info h2 {
    color: var(--color-white);
    margin-bottom: var(--spacing-2);
}

.profile-info p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0;
}

.settings-tabs {
    display: flex;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: var(--spacing-6);
    gap: var(--spacing-2);
}

.settings-tab {
    padding: var(--spacing-3) var(--spacing-5);
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--color-text-muted);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.settings-tab:hover {
    color: var(--color-text-primary);
}

.settings-tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.settings-panel {
    display: none;
}

.settings-panel.active {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    background-color: var(--color-primary);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-8) 0;
    margin-top: auto;
}

.footer a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer a:hover {
    color: var(--color-white);
}

/* ===================================
   UTILITIES
   =================================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.p-0 { padding: 0; }
.p-2 { padding: var(--spacing-2); }
.p-4 { padding: var(--spacing-4); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 768px) {
    .dashboard-stats {
        grid-template-columns: 1fr;
    }
    
    .quick-actions {
        grid-template-columns: 1fr;
    }
    
    .step-wizard {
        flex-direction: column;
        gap: var(--spacing-4);
    }
    
    .step:not(:last-child)::after {
        display: none;
    }
    
    .profile-header {
        flex-direction: column;
        text-align: center;
    }
    
    .settings-tabs {
        flex-direction: column;
        border-bottom: none;
    }
    
    .settings-tab {
        border-bottom: 1px solid var(--color-border);
        border-left: 3px solid transparent;
    }
    
    .settings-tab.active {
        border-left-color: var(--color-primary);
        border-bottom-color: var(--color-border);
    }
}

/* ===================================
   PRINT STYLES
   =================================== */
@media print {
    .navbar,
    .footer,
    .btn,
    .alert {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* ===================================
   MODERN ANIMATIONS
   =================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}

/* Fade in with delay for staggered effect */
.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }

.stat-card:nth-child(1) { animation-delay: 0.1s; }
.stat-card:nth-child(2) { animation-delay: 0.2s; }
.stat-card:nth-child(3) { animation-delay: 0.3s; }
.stat-card:nth-child(4) { animation-delay: 0.4s; }

/* ===================================
   DATATABLES - MONOCHROME THEME
   =================================== */

/* DataTables Wrapper */
.dataTables_wrapper {
    font-family: var(--font-primary);
}

/* DataTables Length & Filter */
.dataTables_length {
    margin-bottom: var(--spacing-4);
}

.dataTables_length select {
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-2) var(--spacing-6);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    background-color: var(--color-white);
    transition: all var(--transition-fast);
}

.dataTables_filter input {
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    background-color: var(--color-white);
    transition: all var(--transition-fast);
}

.dataTables_length select:focus,
.dataTables_filter input:focus {
    border-color: var(--color-accent);
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 85, 104, 0.1);
}

.dataTables_length label,
.dataTables_filter label {
    color: var(--color-text-primary);
    font-weight: 500;
}

/* DataTables Info */
.dataTables_info {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    padding: var(--spacing-3) 0;
}

/* DataTables Processing */
.dataTables_processing {
    position: fixed !important;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%, -50%) !important;
    background: var(--color-white) !important;
    color: var(--color-text-primary) !important;
    border: 2px solid var(--color-border-dark) !important;
    border-radius: var(--radius-lg) !important;
    padding: var(--spacing-6) !important;
    box-shadow: var(--shadow-xl) !important;
    z-index: 9999 !important;
}

/* DataTables Pagination - MONOCHROME */
.dataTables_paginate {
    padding: var(--spacing-3) 0;
}

.dataTables_paginate .paginate_button {
    background: var(--color-white) !important;
    border: 2px solid var(--color-border) !important;
    color: var(--color-text-primary) !important;
    padding: var(--spacing-2) var(--spacing-3) !important;
    margin: 0 2px !important;
    border-radius: var(--radius-md) !important;
    font-weight: 500 !important;
    transition: all var(--transition-fast) !important;
    cursor: pointer !important;
}

.dataTables_paginate .paginate_button:hover {
    background: var(--color-bg-secondary) !important;
    border-color: var(--color-border-dark) !important;
    color: var(--color-text-primary) !important;
}

.dataTables_paginate .paginate_button.current,
.dataTables_paginate .paginate_button.current:hover {
    background: var(--color-primary) !important;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%) !important;
    border-color: var(--color-primary) !important;
    color: var(--color-white) !important;
    box-shadow: var(--shadow-sm) !important;
}

.dataTables_paginate .paginate_button.disabled,
.dataTables_paginate .paginate_button.disabled:hover {
    background: var(--color-bg-secondary) !important;
    border-color: var(--color-border) !important;
    color: var(--color-text-muted) !important;
    cursor: not-allowed !important;
    opacity: 0.5 !important;
}

/* Remove default Bootstrap blue colors */
.page-link {
    color: var(--color-text-primary) !important;
    background-color: var(--color-white) !important;
    border-color: var(--color-border) !important;
}

.page-link:hover {
    color: var(--color-text-primary) !important;
    background-color: var(--color-bg-secondary) !important;
    border-color: var(--color-border-dark) !important;
}

.page-item.active .page-link {
    background-color: var(--color-primary) !important;
    border-color: var(--color-primary) !important;
    color: var(--color-white) !important;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%) !important;
}

.page-item.disabled .page-link {
    color: var(--color-text-muted) !important;
    background-color: var(--color-bg-secondary) !important;
    border-color: var(--color-border) !important;
}

/* DataTables Table Styling */
table.dataTable {
    border-collapse: separate !important;
    border-spacing: 0 !important;
    width: 100% !important;
}

.dataTables_wrapper .table-responsive {
    width: 100% !important;
}

table.dataTable thead th {
    border-bottom: 2px solid var(--color-border-dark) !important;
    color: var(--color-text-primary) !important;
    font-weight: 600 !important;
    padding: var(--spacing-4) var(--spacing-3) !important;
}

/* Ensure dark table headers have white text */
.table-dark thead th,
.table thead.table-dark th,
.table-dark th {
    color: var(--color-white) !important;
}

/* Center align actions column */
table.dataTable tbody td:last-child,
table.dataTable thead th:last-child,
table tbody td:last-child,
table thead th:last-child,
.text-end {
    text-align: center !important;
}

table.dataTable tbody td {
    padding: var(--spacing-3) !important;
    border-bottom: 1px solid var(--color-border) !important;
}

table.dataTable tbody tr {
    transition: background-color var(--transition-fast);
}

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

/* DataTables Sorting */
table.dataTable thead .sorting,
table.dataTable thead .sorting_asc,
table.dataTable thead .sorting_desc {
    cursor: pointer;
    position: relative;
}

table.dataTable thead .sorting:before,
table.dataTable thead .sorting_asc:before,
table.dataTable thead .sorting_desc:before,
table.dataTable thead .sorting:after,
table.dataTable thead .sorting_asc:after,
table.dataTable thead .sorting_desc:after {
    color: var(--color-text-muted) !important;
    opacity: 0.5;
}

table.dataTable thead .sorting_asc:before,
table.dataTable thead .sorting_desc:after {
    opacity: 1 !important;
    color: var(--color-primary) !important;
}

/* DataTables Buttons - Monochrome */
.dt-buttons {
    display: flex;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-4);
    padding-top: var(--spacing-2);
}

.dt-button {
    background: var(--color-white) !important;
    border: 2px solid var(--color-border) !important;
    color: var(--color-text-primary) !important;
    padding: var(--spacing-2) var(--spacing-4) !important;
    border-radius: var(--radius-md) !important;
    font-weight: 500 !important;
    font-size: var(--text-sm) !important;
    transition: all var(--transition-fast) !important;
    cursor: pointer !important;
}

.dt-button:hover {
    background: var(--color-accent) !important;
    border-color: var(--color-accent) !important;
    color: var(--color-white) !important;
    box-shadow: var(--shadow-sm) !important;
}

.dt-button:active,
.dt-button.active {
    background: var(--color-primary) !important;
    border-color: var(--color-primary) !important;
    color: var(--color-white) !important;
    box-shadow: none !important;
}

/* DataTables Responsive */
table.dataTable.dtr-inline.collapsed > tbody > tr > td.dtr-control:before,
table.dataTable.dtr-inline.collapsed > tbody > tr > th.dtr-control:before {
    background-color: var(--color-primary) !important;
    border-color: var(--color-primary) !important;
    box-shadow: none !important;
}

/* DataTables Empty State */
table.dataTable tbody td.dataTables_empty {
    text-align: center !important;
    padding: var(--spacing-8) !important;
    color: var(--color-text-muted) !important;
    font-style: italic !important;
}

/* Force DataTables wrapper to full width */
.dataTables_wrapper {
    width: 100% !important;
}

.dataTables_scroll {
    width: 100% !important;
}

.dataTables_scrollBody {
    width: 100% !important;
}

/* Make sure export buttons use monochrome theme */
.buttons-html5,
.buttons-print,
.buttons-copy,
.buttons-csv,
.buttons-excel,
.buttons-pdf {
    background: var(--color-white) !important;
    border: 2px solid var(--color-border) !important;
    color: var(--color-text-primary) !important;
}

.buttons-html5:hover,
.buttons-print:hover,
.buttons-copy:hover,
.buttons-csv:hover,
.buttons-excel:hover,
.buttons-pdf:hover {
    background: var(--color-accent) !important;
    border-color: var(--color-accent) !important;
    color: var(--color-white) !important;
}