/**
 * Yuyuan Technology - Dual Theme System
 * Supports Dark & Light modes with Crimson (#C41E3A) accent
 */

/* ========================================
   CSS VARIABLES - LIGHT THEME (DEFAULT)
   ======================================== */
:root {
    /* Primary Brand Colors */
    --primary-color: #C41E3A;
    --primary-hover: #9E1830;
    --primary-light: rgba(196, 30, 58, 0.1);
    --primary-rgb: 196, 30, 58;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f1f3f4;
    --bg-card: #ffffff;
    --bg-sidebar: #ffffff;
    --bg-navbar: #ffffff;
    --bg-hover: rgba(0, 0, 0, 0.04);
    --bg-active: rgba(196, 30, 58, 0.08);
    
    /* Border Colors */
    --border-color: #e0e0e0;
    --border-light: rgba(0, 0, 0, 0.08);
    --border-accent: rgba(196, 30, 58, 0.3);
    
    /* Text Colors */
    --text-primary: #1a1a2e;
    --text-secondary: #5f6368;
    --text-muted: #9aa0a6;
    --text-inverse: #ffffff;
    
    /* Shadow */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.08);
    
    /* Status Colors */
    --success-color: #34a853;
    --success-bg: #e8f5e9;
    --warning-color: #fbbc05;
    --warning-bg: #fff3e0;
    --danger-color: #ea4335;
    --danger-bg: #ffebee;
    --info-color: #1a73e8;
    --info-bg: #e3f2fd;
    
    /* Input */
    --input-bg: #ffffff;
    --input-border: #dadce0;
    --input-focus: var(--primary-color);
    
    /* Transitions */
    --transition-speed: 0.3s;
}

/* ========================================
   CSS VARIABLES - DARK THEME
   ======================================== */
[data-theme="dark"] {
    /* Primary Brand Colors */
    --primary-color: #E53958;
    --primary-hover: #FF4567;
    --primary-light: rgba(229, 57, 88, 0.15);
    --primary-rgb: 229, 57, 88;
    
    /* Background Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a2e;
    --bg-card: #16161f;
    --bg-sidebar: #0f0f15;
    --bg-navbar: #0d0d12;
    --bg-hover: rgba(255, 255, 255, 0.05);
    --bg-active: rgba(229, 57, 88, 0.15);
    
    /* Border Colors */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-light: rgba(255, 255, 255, 0.06);
    --border-accent: rgba(229, 57, 88, 0.4);
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7b;
    --text-inverse: #1a1a2e;
    
    /* Shadow */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.6);
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.4);
    
    /* Status Colors - adjusted for dark */
    --success-color: #4caf50;
    --success-bg: rgba(76, 175, 80, 0.15);
    --warning-color: #ffb300;
    --warning-bg: rgba(255, 179, 0, 0.15);
    --danger-color: #ef5350;
    --danger-bg: rgba(239, 83, 80, 0.15);
    --info-color: #42a5f5;
    --info-bg: rgba(66, 165, 245, 0.15);
    
    /* Input */
    --input-bg: #1a1a24;
    --input-border: rgba(255, 255, 255, 0.12);
    --input-focus: var(--primary-color);
}

/* ========================================
   BASE STYLES
   ======================================== */
body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    min-height: 100vh;
}

html {
    background-color: var(--bg-secondary);
}

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
    background-color: var(--bg-navbar) !important;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: background-color var(--transition-speed);
}

.navbar-brand {
    font-weight: 600;
    color: var(--text-primary) !important;
    display: flex;
    align-items: center;
    gap: 12px;
}

.navbar-brand .brand-logo {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.navbar-brand .brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.navbar-brand .brand-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-color);
}

.navbar-brand .brand-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 400;
}

.navbar .nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    transition: color 0.2s;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
    color: var(--primary-color) !important;
}

/* Navbar toggler icon for dark mode */
.navbar-toggler {
    border-color: var(--border-color);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

[data-theme="light"] .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%280, 0, 0, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ========================================
   SIDEBAR
   ======================================== */
.sidebar {
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    min-height: calc(100vh - 65px);
    transition: background-color var(--transition-speed);
}

.sidebar .nav-link {
    color: var(--text-secondary);
    padding: 14px 20px;
    border-left: 3px solid transparent;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar .nav-link:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.sidebar .nav-link.active {
    background-color: var(--bg-active);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.sidebar .nav-link i {
    font-size: 1.1rem;
    width: 24px;
    text-align: center;
}

/* ========================================
   CARDS
   ======================================== */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-card);
    transition: background-color var(--transition-speed), border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-weight: 600;
    padding: 16px 20px;
}

.card-header h5, .card-header h6 {
    margin: 0;
    color: var(--text-primary);
}

.card-body {
    background-color: var(--bg-card);
    color: var(--text-primary);
}

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

/* Accent card variant */
.card-accent {
    border-left: 4px solid var(--primary-color);
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    font-weight: 500;
    border-radius: 8px;
    padding: 8px 16px;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.3);
}

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

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

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

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

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

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

/* Theme Toggle Button */
.btn-theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-theme-toggle:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* ========================================
   FORMS
   ======================================== */
.form-control, .form-select {
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 10px 14px;
    transition: all 0.2s;
}

.form-control:focus, .form-select:focus {
    background-color: var(--input-bg);
    border-color: var(--input-focus);
    color: var(--text-primary);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.15);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-label {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 6px;
}

.form-text {
    color: var(--text-muted);
}

/* Input groups */
.input-group-text {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-secondary);
}

/* Form check */
.form-check-input {
    background-color: var(--input-bg);
    border-color: var(--input-border);
}

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

.form-check-label {
    color: var(--text-secondary);
}

/* ========================================
   TABLES
   ======================================== */
.table {
    color: var(--text-primary);
    --bs-table-bg: transparent;
    --bs-table-color: var(--text-primary);
    --bs-table-border-color: var(--border-color);
}

.table thead th {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
    padding: 14px;
}

.table tbody td {
    border-bottom: 1px solid var(--border-color);
    padding: 14px;
    vertical-align: middle;
    background-color: transparent;
}

/* Light theme - subtle red background with dark text */
.table tbody tr:hover {
    background-color: rgba(196, 30, 58, 0.15) !important;
}

.table-hover > tbody > tr:hover {
    --bs-table-bg-state: rgba(196, 30, 58, 0.15) !important;
    background-color: rgba(196, 30, 58, 0.15) !important;
}

/* Dark theme - stronger red background with white text */
[data-theme="dark"] .table tbody tr:hover,
[data-theme="dark"] .table-hover > tbody > tr:hover {
    background-color: rgba(229, 57, 88, 0.4) !important;
    --bs-table-bg-state: rgba(229, 57, 88, 0.4) !important;
}

[data-theme="dark"] .table-hover > tbody > tr:hover td,
[data-theme="dark"] .table-hover > tbody > tr:hover th,
[data-theme="dark"] .table tbody tr:hover td,
[data-theme="dark"] .table tbody tr:hover th {
    color: #ffffff !important;
}

/* Table striping for dark mode */
.table-striped > tbody > tr:nth-of-type(odd) > * {
    --bs-table-bg-type: var(--bg-hover);
}

/* ========================================
   STATUS BADGES
   ======================================== */
.status-badge {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.status-draft { 
    background-color: var(--bg-tertiary); 
    color: var(--text-secondary); 
}
.status-submitted { 
    background-color: var(--info-bg); 
    color: var(--info-color); 
}
.status-under_review { 
    background-color: var(--warning-bg); 
    color: var(--warning-color); 
}
.status-additional_docs_required { 
    background-color: rgba(196, 30, 58, 0.15); 
    color: var(--primary-color); 
}
.status-approved { 
    background-color: var(--success-bg); 
    color: var(--success-color); 
}
.status-rejected { 
    background-color: var(--danger-bg); 
    color: var(--danger-color); 
}
.status-completed { 
    background-color: rgba(0, 150, 136, 0.15); 
    color: #009688; 
}

/* ========================================
   STAT CARDS
   ======================================== */
.stat-card {
    background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.9) 0%, rgba(var(--primary-rgb), 0.7) 100%);
    color: white;
    padding: 24px;
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
}

.stat-card h3 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 8px;
    position: relative;
}

.stat-card p {
    margin: 0;
    opacity: 0.9;
    font-size: 0.95rem;
    position: relative;
}

.stat-card .stat-icon {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 3rem;
    opacity: 0.2;
}

/* ========================================
   LOGIN / AUTH PAGES
   ======================================== */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-tertiary) 100%);
    padding: 20px;
}

.auth-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 440px;
    overflow: hidden;
}

.auth-card .auth-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.auth-card .auth-header .auth-logo {
    height: 60px;
    margin-bottom: 16px;
}

.auth-card .auth-header h3 {
    margin: 0;
    font-weight: 600;
}

.auth-card .auth-header p {
    margin: 8px 0 0;
    opacity: 0.9;
}

.auth-card .auth-body {
    padding: 32px;
    background-color: var(--bg-card);
}

.auth-footer {
    text-align: center;
    padding: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
    background-color: var(--bg-card);
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
}

/* ========================================
   LOADING & TOASTS
   ======================================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(var(--bg-primary-rgb, 10, 10, 10), 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
}

.spinner-border-custom {
    width: 3rem;
    height: 3rem;
    border-width: 0.25em;
    color: var(--primary-color);
}

.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1050;
}

.toast {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
}

.toast-header {
    background-color: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.toast-body {
    color: var(--text-primary);
}

/* ========================================
   TIMELINE
   ======================================== */
.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary-color), transparent);
}

.timeline-item {
    position: relative;
    padding-bottom: 24px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -26px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: 3px solid var(--bg-card);
    box-shadow: 0 0 0 2px var(--primary-color);
}

.timeline-item.completed::before {
    background-color: var(--success-color);
    box-shadow: 0 0 0 2px var(--success-color);
}

.timeline-item.rejected::before {
    background-color: var(--danger-color);
    box-shadow: 0 0 0 2px var(--danger-color);
}

.timeline-content {
    background-color: var(--bg-tertiary);
    padding: 16px;
    border-radius: 10px;
    border-left: 3px solid var(--primary-color);
}

.timeline-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

/* ========================================
   DOCUMENT CARDS
   ======================================== */
.document-card {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all 0.2s;
}

.document-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-2px);
}

.document-card .doc-icon {
    width: 48px;
    height: 48px;
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.document-card .doc-info {
    flex: 1;
}

.document-card .doc-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.document-card .doc-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ========================================
   DROPDOWN
   ======================================== */
.dropdown-menu {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    border-radius: 10px;
}

.dropdown-item {
    color: var(--text-primary);
    padding: 10px 16px;
}

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

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

.dropdown-toggle::after {
    border-top-color: var(--text-secondary);
}

/* ========================================
   MODAL
   ======================================== */
.modal-content {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    color: var(--text-primary);
}

.modal-header {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
}

.modal-header .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

[data-theme="light"] .modal-header .btn-close {
    filter: none;
}

.modal-footer {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
}

.modal-body {
    background-color: var(--bg-card);
    color: var(--text-primary);
}

/* ========================================
   PAGINATION
   ======================================== */
.pagination .page-link {
    background-color: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.pagination .page-link:hover {
    background-color: var(--bg-hover);
    border-color: var(--border-color);
    color: var(--primary-color);
}

.pagination .page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.pagination .page-item.disabled .page-link {
    background-color: var(--bg-tertiary);
    color: var(--text-muted);
}

/* ========================================
   ALERTS
   ======================================== */
.alert {
    border: none;
    border-radius: 10px;
    padding: 16px 20px;
}

.alert-primary {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

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

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

.alert-danger {
    background-color: var(--danger-bg);
    color: var(--danger-color);
}

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

/* Alert links */
.alert a {
    color: inherit;
    text-decoration: underline;
}

/* ========================================
   TABS
   ======================================== */
.nav-tabs {
    border-bottom: 1px solid var(--border-color);
}

.nav-tabs .nav-link {
    color: var(--text-secondary);
    border: none;
    border-bottom: 2px solid transparent;
    padding: 12px 20px;
    background-color: transparent;
}

.nav-tabs .nav-link:hover {
    border-color: transparent;
    color: var(--text-primary);
}

.nav-tabs .nav-link.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background-color: transparent;
}

/* ========================================
   LIST GROUPS
   ======================================== */
.list-group {
    background-color: transparent;
}

.list-group-item {
    background-color: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.list-group-item:hover {
    background-color: var(--bg-hover);
}

.list-group-item.active {
    background-color: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* ========================================
   BADGES
   ======================================== */
.badge.bg-light {
    background-color: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--border-color);
}

.badge.bg-dark {
    background-color: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
}

/* ========================================
   CODE ELEMENTS
   ======================================== */
code {
    color: var(--primary-color);
    background-color: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.875em;
}

pre {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    color: var(--text-primary);
}

/* ========================================
   UTILITIES
   ======================================== */
.text-primary { color: var(--primary-color) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-muted) !important; }

.bg-primary { background-color: var(--primary-color) !important; }
.bg-secondary { background-color: var(--bg-secondary) !important; }
.bg-tertiary { background-color: var(--bg-tertiary) !important; }
.bg-light {
    background-color: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
}
.bg-white {
    background-color: var(--bg-card) !important;
    color: var(--text-primary) !important;
}
.bg-dark {
    background-color: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
}

.border-accent { border-color: var(--primary-color) !important; }

/* ========================================
   SCROLLBAR
   ======================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ========================================
   SELECTION
   ======================================== */
::selection {
    background-color: rgba(var(--primary-rgb), 0.3);
    color: var(--text-primary);
}

/* ========================================
   MAIN CONTENT AREA
   ======================================== */
.main-content {
    padding: 28px;
    min-height: calc(100vh - 65px);
    background-color: var(--bg-secondary);
}

/* ========================================
   PAGE HEADER
   ======================================== */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
}

.page-header h1, .page-header h2 {
    margin: 0;
    font-weight: 700;
    color: var(--text-primary);
}

.page-header .page-subtitle {
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ========================================
   BREADCRUMB
   ======================================== */
.breadcrumb {
    background: transparent;
    padding: 0;
    margin: 0;
}

.breadcrumb-item a {
    color: var(--text-secondary);
    text-decoration: none;
}

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

.breadcrumb-item.active {
    color: var(--text-primary);
}

.breadcrumb-item + .breadcrumb-item::before {
    color: var(--text-muted);
}

/* ========================================
   EMPTY STATE
   ======================================== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state .empty-icon {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h4 {
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--text-muted);
    max-width: 400px;
    margin: 0 auto;
}

/* ========================================
   ACTION BUTTONS
   ======================================== */
.action-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border: none;
    transition: all 0.2s;
    cursor: pointer;
    text-decoration: none;
}

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

.action-btn.btn-view:hover {
    background-color: var(--info-color);
}

.action-btn.btn-edit:hover {
    background-color: var(--warning-color);
}

.action-btn.btn-delete:hover {
    background-color: var(--danger-color);
}

/* ========================================
   APP FOOTER
   ======================================== */
.app-footer {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    background-color: var(--bg-secondary);
}

.app-footer a {
    color: var(--primary-color);
    text-decoration: none;
}

/* ========================================
   RESPONSIVE FIXES
   ======================================== */
@media (max-width: 768px) {
    .main-content {
        padding: 16px;
    }
    
    .page-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
    
    .sidebar {
        min-height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
}