/**
 * CRM System Styles
 * Modern, Clean, Responsive Design
 */

/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
    /* Colors */
    --color-primary: #4f46e5;
    --color-primary-dark: #4338ca;
    --color-primary-light: #6366f1;
    --color-primary-bg: #eef2ff;
    
    --color-success: #10b981;
    --color-success-bg: #d1fae5;
    --color-warning: #f59e0b;
    --color-warning-bg: #fef3c7;
    --color-danger: #ef4444;
    --color-danger-bg: #fee2e2;
    --color-info: #3b82f6;
    --color-info-bg: #dbeafe;
    
    /* Grays */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Layout */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --header-height: 64px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 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);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition: 200ms ease;
    --transition-slow: 300ms ease;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    font-size: 0.9375rem;
    line-height: 1.5;
    color: var(--color-gray-800);
    background-color: var(--color-gray-50);
}

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

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

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

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    color: var(--color-gray-900);
}

h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
    margin-bottom: 1rem;
}

.text-muted { color: var(--color-gray-500); }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-primary { color: var(--color-primary); }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.5;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

.btn svg {
    width: 1rem;
    height: 1rem;
}

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

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

.btn-secondary {
    background-color: var(--color-gray-600);
    color: white;
}

.btn-secondary:hover {
    background-color: var(--color-gray-700);
    color: white;
}

.btn-outline {
    background-color: transparent;
    border-color: var(--color-gray-300);
    color: var(--color-gray-700);
}

.btn-outline:hover {
    background-color: var(--color-gray-100);
    border-color: var(--color-gray-400);
    color: var(--color-gray-900);
}

.btn-ghost {
    background-color: transparent;
    color: var(--color-gray-600);
}

.btn-ghost:hover {
    background-color: var(--color-gray-100);
    color: var(--color-gray-900);
}

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

.btn-danger:hover {
    background-color: #dc2626;
    color: white;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

.btn-block {
    width: 100%;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-700);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.9375rem;
    line-height: 1.5;
    color: var(--color-gray-900);
    background-color: white;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.form-input::placeholder {
    color: var(--color-gray-400);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-hint {
    margin-top: 0.375rem;
    font-size: 0.8125rem;
    color: var(--color-gray-500);
}

.form-error {
    margin-top: 0.375rem;
    font-size: 0.8125rem;
    color: var(--color-danger);
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--color-primary);
}

.form-check-label {
    font-size: 0.875rem;
    color: var(--color-gray-700);
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-gray-200);
}

.card-header h2,
.card-header h3 {
    margin: 0;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    background-color: var(--color-gray-50);
    border-top: 1px solid var(--color-gray-200);
}

/* ============================================
   ALERTS
   ============================================ */
.flash-messages {
    padding: 0 1.5rem;
    margin-bottom: 1rem;
}

.alert {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1rem;
    margin-bottom: 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    transition: opacity var(--transition);
}

.alert-success {
    background-color: var(--color-success-bg);
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background-color: var(--color-danger-bg);
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background-color: var(--color-warning-bg);
    color: #92400e;
    border: 1px solid #fde68a;
}

.alert-info {
    background-color: var(--color-info-bg);
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

.alert-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    line-height: 1;
    color: inherit;
    opacity: 0.7;
    cursor: pointer;
}

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

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--color-gray-900);
    color: white;
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: width var(--transition-slow);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .logo-text,
.sidebar.collapsed .nav-section-title,
.sidebar.collapsed .nav-item span,
.sidebar.collapsed .user-info,
.sidebar.collapsed .dropdown-arrow {
    display: none;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 0.75rem;
}

.sidebar.collapsed .user-menu-trigger {
    justify-content: center;
    padding: 0.75rem;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1rem;
    border-bottom: 1px solid var(--color-gray-700);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: white;
    text-decoration: none;
}

.logo-icon {
    width: 2rem;
    height: 2rem;
    color: var(--color-primary-light);
}

.logo-text {
    font-size: 1.125rem;
    font-weight: 600;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--color-gray-400);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.sidebar-toggle:hover {
    color: white;
    background-color: var(--color-gray-700);
}

.sidebar-toggle svg {
    width: 1.25rem;
    height: 1.25rem;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 0;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section-title {
    display: block;
    padding: 0 1rem;
    margin-bottom: 0.5rem;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1rem;
    margin: 0 0.5rem;
    color: var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-item:hover {
    color: white;
    background-color: var(--color-gray-800);
}

.nav-item.active {
    color: white;
    background-color: var(--color-primary);
}

.nav-item svg {
    width: 1.25rem;
    height: 1.25rem;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--color-gray-700);
}

.user-menu {
    position: relative;
}

.user-menu-trigger {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.user-menu-trigger:hover {
    background-color: var(--color-gray-800);
}

.user-avatar {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    background-color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 600;
    flex-shrink: 0;
    overflow: hidden;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: white;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-email {
    display: block;
    font-size: 0.75rem;
    color: var(--color-gray-400);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dropdown-arrow {
    width: 1rem;
    height: 1rem;
    color: var(--color-gray-400);
    transition: transform var(--transition-fast);
}

.user-menu-dropdown {
    position: absolute;
    bottom: 100%;
    left: 0;
    right: 0;
    margin-bottom: 0.5rem;
    background-color: var(--color-gray-800);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-fast);
}

.user-menu-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1rem;
    color: var(--color-gray-300);
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    color: white;
    background-color: var(--color-gray-700);
}

.dropdown-item svg {
    width: 1rem;
    height: 1rem;
}

.dropdown-divider {
    height: 1px;
    margin: 0.5rem 0;
    background-color: var(--color-gray-700);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left var(--transition-slow);
}

.main-content.expanded {
    margin-left: var(--sidebar-collapsed-width);
}

.content-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    height: var(--header-height);
    padding: 0 1.5rem;
    background-color: white;
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: 0;
    z-index: 50;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-gray-600);
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle svg {
    width: 1.5rem;
    height: 1.5rem;
}

.page-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-left: auto;
}

.search-box {
    position: relative;
    width: 280px;
}

.search-box svg {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1rem;
    height: 1rem;
    color: var(--color-gray-400);
}

.search-box input {
    width: 100%;
    padding: 0.5rem 0.75rem 0.5rem 2.25rem;
    font-size: 0.875rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    background-color: var(--color-gray-50);
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    background-color: white;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.content-body {
    padding: 1.5rem;
}

/* ============================================
   PUBLIC LAYOUT (LOGIN/REGISTER)
   ============================================ */
.public-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.public-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    background-color: white;
    border-bottom: 1px solid var(--color-gray-200);
}

.public-nav {
    display: flex;
    gap: 0.75rem;
}

.public-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.public-footer {
    padding: 1.5rem 2rem;
    text-align: center;
    color: var(--color-gray-500);
    font-size: 0.875rem;
    border-top: 1px solid var(--color-gray-200);
}

/* ============================================
   AUTH FORMS
   ============================================ */
.auth-container {
    width: 100%;
    max-width: 420px;
}

.auth-card {
    background-color: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: 2.5rem;
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h1 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--color-gray-500);
    margin: 0;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
    color: var(--color-gray-400);
    font-size: 0.8125rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--color-gray-200);
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.875rem;
    color: var(--color-gray-600);
}

.password-toggle {
    position: relative;
}

.password-toggle input {
    padding-right: 2.5rem;
}

.password-toggle button {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-gray-400);
    cursor: pointer;
}

/* ============================================
   DASHBOARD
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background-color: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.stat-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.stat-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon svg {
    width: 1.25rem;
    height: 1.25rem;
}

.stat-icon.primary {
    background-color: var(--color-primary-bg);
    color: var(--color-primary);
}

.stat-icon.success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.stat-icon.warning {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}

.stat-icon.info {
    background-color: var(--color-info-bg);
    color: var(--color-info);
}

.stat-value {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--color-gray-900);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-top: 0.25rem;
}

.stat-change {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.8125rem;
    font-weight: 500;
    margin-top: 0.5rem;
}

.stat-change.positive {
    color: var(--color-success);
}

.stat-change.negative {
    color: var(--color-danger);
}

/* ============================================
   ACCOUNT PAGES
   ============================================ */
.account-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 1.5rem;
}

.account-sidebar {
    background-color: white;
    border-radius: var(--radius-lg);
    padding: 1rem;
    height: fit-content;
    box-shadow: var(--shadow);
}

.account-nav {
    list-style: none;
}

.account-nav li {
    margin-bottom: 0.25rem;
}

.account-nav a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.875rem;
    color: var(--color-gray-600);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.account-nav a:hover {
    color: var(--color-gray-900);
    background-color: var(--color-gray-100);
}

.account-nav a.active {
    color: var(--color-primary);
    background-color: var(--color-primary-bg);
}

.account-nav svg {
    width: 1.125rem;
    height: 1.125rem;
}

.account-content {
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.account-section {
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-gray-200);
}

.account-section:last-child {
    border-bottom: none;
}

.account-section-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.account-section-desc {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-bottom: 1.25rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

/* ============================================
   ACTIVITY LOG
   ============================================ */
.activity-list {
    list-style: none;
}

.activity-item {
    display: flex;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-gray-100);
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-icon {
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background-color: var(--color-gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.activity-icon svg {
    width: 1rem;
    height: 1rem;
    color: var(--color-gray-500);
}

.activity-content {
    flex: 1;
    min-width: 0;
}

.activity-text {
    font-size: 0.875rem;
    color: var(--color-gray-700);
}

.activity-time {
    font-size: 0.75rem;
    color: var(--color-gray-400);
    margin-top: 0.25rem;
}

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

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 0.875rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.table th {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
    background-color: var(--color-gray-50);
}

.table tbody tr:hover {
    background-color: var(--color-gray-50);
}

/* ============================================
   BADGES
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
}

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

.badge-success {
    background-color: var(--color-success-bg);
    color: #065f46;
}

.badge-warning {
    background-color: var(--color-warning-bg);
    color: #92400e;
}

.badge-danger {
    background-color: var(--color-danger-bg);
    color: #991b1b;
}

.badge-gray {
    background-color: var(--color-gray-100);
    color: var(--color-gray-600);
}

/* ============================================
   EMPTY STATES
   ============================================ */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
}

.empty-state-icon {
    width: 4rem;
    height: 4rem;
    margin: 0 auto 1rem;
    color: var(--color-gray-300);
}

.empty-state-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: 0.5rem;
}

.empty-state-desc {
    color: var(--color-gray-500);
    margin-bottom: 1.5rem;
}

/* ============================================
   COMING SOON
   ============================================ */
.coming-soon {
    text-align: center;
    padding: 4rem 2rem;
}

.coming-soon-icon {
    width: 5rem;
    height: 5rem;
    margin: 0 auto 1.5rem;
    color: var(--color-gray-300);
}

.coming-soon h2 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.coming-soon p {
    color: var(--color-gray-500);
    max-width: 400px;
    margin: 0 auto;
}

/* ============================================
   UTILITIES
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .account-layout {
        grid-template-columns: 1fr;
    }
    
    .account-sidebar {
        display: flex;
        overflow-x: auto;
        padding: 0.5rem;
    }
    
    .account-nav {
        display: flex;
        gap: 0.5rem;
    }
    
    .account-nav li {
        margin-bottom: 0;
    }
    
    .account-nav a {
        white-space: nowrap;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .search-box {
        display: none;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .auth-card {
        padding: 1.5rem;
    }
    
    .public-header {
        padding: 1rem;
    }
    
    .public-nav .btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.8125rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   PAGE HEADER STYLES (for module pages)
   ============================================ */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-header-content {
    flex: 1;
    min-width: 200px;
}

.page-header .page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin: 0 0 0.25rem 0;
}

.page-header .page-subtitle {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin: 0;
}

.page-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--color-gray-500);
    text-decoration: none;
}

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

.breadcrumb-separator {
    color: var(--color-gray-400);
}

@media (max-width: 640px) {
    .page-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .page-actions {
        width: 100%;
    }
    
    .page-actions .btn {
        flex: 1;
        justify-content: center;
    }
}