/* ============================================
   Aristan Demo Layout - Inspired by aristan-online.com
   ============================================ */

:root {
    /* Primary Colors - Aristan-inspired palette */
    --aristan-primary: #1a5490;
    --aristan-secondary: #2874b5;
    --aristan-accent: #ed6c30;
    --aristan-dark: #0f3a5f;
    --aristan-light: #f0f4f8;
    
    /* Neutral Colors */
    --white: #ffffff;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --border-color: #e2e8f0;
    --bg-light: #f7fafc;
    --bg-hover: #edf2f7;
    
    /* Sidebar */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;
    --sidebar-bg: #ffffff;
    --sidebar-border: #e2e8f0;
    
    /* Transitions */
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --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);
}

/* ============================================
   Base Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body.aristan-layout {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-light);
    overflow-x: hidden;
}

/* ============================================
   Layout Container
   ============================================ */
.layout-container {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* ============================================
   Sidebar
   ============================================ */
.aristan-sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    transition: width var(--transition-base), transform var(--transition-base);
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

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

/* Sidebar Header */
.sidebar-header {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 70px;
}

.brand a {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: opacity var(--transition-fast);
}

.brand a:hover {
    opacity: 0.8;
}

.brand-logo {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--aristan-primary), var(--aristan-secondary));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.brand-icon {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
}

.brand-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--aristan-dark);
    white-space: nowrap;
    transition: opacity var(--transition-base);
}

.aristan-sidebar.collapsed .brand-text {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.sidebar-collapse-btn {
    background: var(--bg-hover);
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.sidebar-collapse-btn:hover {
    background: var(--aristan-light);
    color: var(--aristan-primary);
}

.aristan-sidebar.collapsed .sidebar-collapse-btn .fa-angles-left {
    transform: rotate(180deg);
}

/* Sidebar Navigation */
.sidebar-navigation {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1rem 0.75rem;
}

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

.sidebar-navigation::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-navigation::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.sidebar-navigation::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.nav-items {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.nav-item {
    position: relative;
}

.nav-item-link {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: all var(--transition-fast);
    position: relative;
    font-weight: 500;
}

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

.nav-item-link.active,
.nav-item-link:active {
    background: linear-gradient(90deg, rgba(26, 84, 144, 0.1), transparent);
    color: var(--aristan-primary);
}

.nav-item-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
    background: var(--aristan-accent);
    border-radius: 0 3px 3px 0;
}

.nav-item-icon {
    font-size: 1.125rem;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.nav-item-link:hover .nav-item-icon {
    transform: scale(1.1);
}

.nav-item-label {
    white-space: nowrap;
    transition: opacity var(--transition-base);
}

.aristan-sidebar.collapsed .nav-item-label {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.nav-item-arrow {
    margin-left: auto;
    font-size: 0.75rem;
    transition: transform var(--transition-fast);
}

.aristan-sidebar.collapsed .nav-item-arrow {
    display: none;
}

/* Submenu */
.nav-item.has-children .submenu-trigger.active .nav-item-arrow {
    transform: rotate(180deg);
}

.nav-submenu {
    list-style: none;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base) ease;
    padding-left: 2.5rem;
}

.nav-submenu.active {
    max-height: 500px;
    padding-top: 0.25rem;
    padding-bottom: 0.25rem;
}

.aristan-sidebar.collapsed .nav-submenu {
    display: none;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

/* ============================================
   Main Container
   ============================================ */
.main-container {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left var(--transition-base), width var(--transition-base);
}

.aristan-sidebar.collapsed ~ .main-container {
    margin-left: var(--sidebar-collapsed-width);
    width: calc(100% - var(--sidebar-collapsed-width));
}

/* ============================================
   Top Bar
   ============================================ */
.top-bar {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 70px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: background-color var(--transition-fast);
}

.mobile-menu-btn:hover {
    background-color: var(--bg-hover);
}

.page-heading {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--aristan-dark);
    margin: 0;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.user-name {
    font-weight: 500;
    color: var(--text-secondary);
}

/* ============================================
   Page Content
   ============================================ */
.page-content {
    flex: 1;
    padding: 2rem;
    background-color: var(--bg-light);
}

.content-wrapper {
    max-width: 1400px;
    margin: 0 auto;
}

/* ============================================
   Page Footer
   ============================================ */
.page-footer {
    background-color: var(--white);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    margin-top: auto;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-section p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.875rem;
}

.footer-section a {
    color: var(--aristan-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: var(--aristan-accent);
}

/* ============================================
   Mobile Overlay
   ============================================ */
.mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.mobile-overlay.active {
    display: block;
    opacity: 1;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .top-bar {
        padding: 1rem 1.5rem;
    }
    
    .page-content {
        padding: 1.5rem;
    }
    
    .page-heading {
        font-size: 1.25rem;
    }
}

@media (max-width: 768px) {
    .aristan-sidebar {
        transform: translateX(-100%);
    }
    
    .aristan-sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .main-container {
        margin-left: 0;
        width: 100%;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .top-bar {
        padding: 1rem;
    }
    
    .page-content {
        padding: 1rem;
    }
    
    .page-heading {
        font-size: 1.125rem;
    }
    
    .user-name {
        display: none;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .sidebar-header {
        padding: 1rem;
    }
    
    .brand-logo {
        width: 36px;
        height: 36px;
    }
    
    .brand-icon {
        font-size: 1.25rem;
    }
    
    .brand-text {
        font-size: 1.125rem;
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }