:root {
    --color-primary: #593CFB;
    --color-primary-dark: #4A2FD9;
    --color-primary-light: #7B5FFC;
    
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;
    --color-info: #3B82F6;
    
    --color-bg: #F8F9FA;
    --color-bg-secondary: #FFFFFF;
    --color-border: #E5E7EB;
    --color-text: #1F2937;
    --color-text-secondary: #6B7280;
    --color-text-muted: #9CA3AF;
    
    --sidebar-width: 240px;
    --sidebar-collapsed-width: 64px;
    --topbar-height: 60px;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    --transition: all 0.2s ease;
}

[data-theme="dark"] {
    --color-bg: #111827;
    --color-bg-secondary: #1F2937;
    --color-border: #374151;
    --color-text: #F9FAFB;
    --color-text-secondary: #D1D5DB;
    --color-text-muted: #9CA3AF;
}

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

html {
    overflow-x: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

.app-container {
    display: flex;
    min-height: 100vh;
    overflow-x: hidden;
    width: 100%;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    transition: var(--transition);
    z-index: 1000;
}

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

.sidebar-collapsed .logo-text,
.sidebar-collapsed .nav-text {
    display: none;
}

.sidebar-collapsed .sidebar-header {
    justify-content: center;
    height: auto;
    padding: var(--spacing-sm) var(--spacing-xs);
}

.sidebar-collapsed .logo {
    justify-content: center;
    cursor: pointer;
}

.sidebar-collapsed .logo svg {
    width: 30px;
    height: 30px;
}

.sidebar-collapsed .sidebar-toggle {
    display: none;
}

.sidebar-collapsed .sidebar-nav {
    padding: var(--spacing-xs) var(--spacing-xs);
}

.sidebar-collapsed .nav-item {
    justify-content: center;
    padding: 10px;
    width: calc(var(--sidebar-collapsed-width) - 16px);
    margin: 2px auto;
    border-radius: var(--radius-md);
    position: relative;
}

.sidebar-collapsed .nav-item:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    left: calc(100% + 8px);
    top: 50%;
    transform: translateY(-50%);
    background: var(--color-text);
    color: var(--color-bg);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    white-space: nowrap;
    z-index: 1001;
    pointer-events: none;
}

.sidebar-collapsed .nav-divider {
    margin: var(--spacing-xs) var(--spacing-sm);
}

.sidebar-collapsed .sidebar-footer {
    padding: var(--spacing-xs);
}

.sidebar-collapsed .sidebar-footer .nav-item {
    justify-content: center;
    padding: 10px;
    width: calc(var(--sidebar-collapsed-width) - 16px);
    margin: 2px auto;
}

.sidebar-header {
    height: var(--topbar-height);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--color-border);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 18px;
    font-weight: 600;
    color: var(--color-primary);
}

.sidebar-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

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

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition);
    margin-bottom: var(--spacing-xs);
}

.nav-item:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

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

.nav-icon {
    flex-shrink: 0;
}

.nav-divider {
    height: 1px;
    background: var(--color-border);
    margin: var(--spacing-md) 0;
}

.sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.sidebar-plan-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    margin-bottom: 0.25rem;
    border-radius: var(--radius-md);
    background: var(--color-bg);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    white-space: nowrap;
    overflow: hidden;
}
.plan-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}
.plan-dot.plan-free { background: var(--color-text-muted); }
.plan-dot.plan-pro { background: var(--color-primary); }
.plan-label { overflow: hidden; text-overflow: ellipsis; }
.sidebar-collapsed .sidebar-plan-badge { justify-content: center; padding: 0.5rem; }
.sidebar-collapsed .sidebar-plan-badge .plan-label { display: none; }

.main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    overflow-x: hidden;
    min-width: 0;
}

.sidebar-collapsed + .main-wrapper {
    margin-left: var(--sidebar-collapsed-width);
}

.topbar {
    height: var(--topbar-height);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar-left,
.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.mobile-sidebar-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--color-text);
}

.search-box {
    position: relative;
    width: 300px;
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 40px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 14px;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.icon-button {
    position: relative;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.icon-button:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.icon-button .badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--color-danger);
    color: white;
    font-size: 10px;
    padding: 2px 5px;
    border-radius: 10px;
    font-weight: 600;
}

.nav-badge {
    position: absolute;
    top: -5px;
    right: -8px;
    background: var(--color-danger);
    color: #fff;
    font-size: 9px;
    font-weight: 700;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    pointer-events: none;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
    animation: navBadgePop 0.3s ease;
}
@keyframes navBadgePop {
    0% { transform: scale(0); }
    60% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.user-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.user-button:hover {
    background: var(--color-bg);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 12px;
}

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

.main-content {
    flex: 1;
    padding: var(--spacing-xl);
    overflow-y: auto;
    overflow-x: hidden;
    min-width: 0;
}

.loader-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
}

.loader {
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loader-message {
    color: var(--color-text-secondary);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
}

.empty-state svg {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.empty-state h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.empty-state p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* Page header */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.page-header h1 {
    font-size: 24px;
    font-weight: 600;
}

/* Sidebar overlay 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-mobile-open ~ .main-wrapper .sidebar-overlay {
    display: block;
}

/* ============================================================
   TABLET (max-width: 1024px)
   ============================================================ */
@media (max-width: 1024px) {
    .main-content {
        padding: var(--spacing-lg);
    }
}

/* ============================================================
   MOBILE (max-width: 768px)
   ============================================================ */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar-mobile-open {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }
    
    .main-wrapper {
        margin-left: 0;
    }
    
    .mobile-sidebar-toggle {
        display: block;
    }
    
    .sidebar-toggle {
        display: none;
    }
    
    .search-box {
        display: none;
    }
    
    .user-name {
        display: none;
    }
    
    .main-content {
        padding: var(--spacing-md);
    }
    
    .topbar {
        padding: 0 var(--spacing-md);
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .page-header select {
        width: 100% !important;
    }
    
    .card {
        padding: var(--spacing-md);
    }
    
    .modal-large {
        width: 95%;
        max-width: none;
        margin: var(--spacing-md);
    }
    
    .modal-body {
        padding: var(--spacing-md);
    }
    
    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
    }
    
    .toast {
        min-width: auto;
        max-width: none;
        width: 100%;
    }
}

/* ============================================================
   SMALL MOBILE (max-width: 480px)
   ============================================================ */
@media (max-width: 480px) {
    .main-content {
        padding: var(--spacing-sm);
    }
    
    .page-header h1 {
        font-size: 20px;
    }
    
    .topbar-right {
        gap: var(--spacing-xs);
    }
    
    .modal-medium,
    .modal-large {
        width: 100%;
        max-width: none;
        border-radius: 0;
        max-height: 100vh;
    }
    
    .modal-header,
    .modal-footer {
        padding: var(--spacing-md);
    }
}