/* Modern Sidebar Layout */
:root {
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;
    --topbar-height: 70px;
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --sidebar-bg: #1e293b;
    --sidebar-hover: #334155;
    --sidebar-active: #6366f1;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --bg-light: #f8fafc;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-primary);
}

/* Wrapper */
.wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--sidebar-bg) 0%, #0f172a 100%);
    color: white;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

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

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

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Sidebar Header */
.sidebar-header {
    padding: 1.5rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: white;
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 700;
    transition: transform 0.2s;
}

.sidebar-brand:hover {
    color: white;
    transform: scale(1.05);
}

.sidebar-brand i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.brand-text {
    white-space: nowrap;
}

.sidebar-toggle {
    background: transparent;
    border: none;
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    transition: background 0.2s;
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Sidebar Navigation */
.sidebar-nav {
    padding: 1rem 0;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-item {
    margin: 0.25rem 0.75rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border-radius: 0.75rem;
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
}

.nav-link i {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
}

.nav-link:hover {
    background: var(--sidebar-hover);
    color: white;
    transform: translateX(5px);
}

.nav-link.active {
    background: var(--sidebar-active);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 60%;
    background: white;
    border-radius: 0 4px 4px 0;
}

.nav-link.logout-btn {
    background: transparent;
    border: none;
    width: 100%;
    text-align: left;
    color: rgba(255, 255, 255, 0.8);
}

.nav-link.logout-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

.sidebar-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 1rem 0.75rem;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 1rem 0.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: auto;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    transition: background 0.2s;
}

.user-info:hover {
    background: rgba(255, 255, 255, 0.1);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

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

.user-avatar i {
    font-size: 1.5rem;
    color: white;
}

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

.user-name {
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-email {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

/* Topbar */
.topbar {
    height: var(--topbar-height);
    background: white;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

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

.sidebar-toggle-btn {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    transition: background 0.2s;
    display: none;
}

.sidebar-toggle-btn:hover {
    background: var(--bg-light);
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

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

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.topbar-action {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    background: transparent;
    cursor: pointer;
}

.topbar-action:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

/* Content Area */
.content-area {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

/* Responsive */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar-toggle-btn {
        display: block;
    }
    
    .content-area {
        padding: 1.5rem;
    }
}

@media (max-width: 768px) {
    .topbar {
        padding: 0 1rem;
    }
    
    .page-title {
        font-size: 1.25rem;
    }
    
    .content-area {
        padding: 1rem;
    }
}

/* Overlay for mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

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

/* Card Modern Styles */
.card {
    border: none;
    border-radius: 1rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

/* Button Modern Styles */
.btn {
    border-radius: 0.75rem;
    padding: 0.625rem 1.25rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Form Modern Styles */
.form-control, .form-select {
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Alert Modern Styles */
.alert {
    border-radius: 0.75rem;
    border: none;
    padding: 1rem 1.25rem;
}