/* Base styles */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
}

/* App Container */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--gray-900);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    transition: transform 0.3s ease;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
}

.logo i {
    color: var(--primary);
    font-size: 28px;
}

.sidebar-menu {
    list-style: none;
    padding: 16px 0;
    flex: 1;
}

.sidebar-menu li {
    margin: 2px 0;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--gray-400);
    text-decoration: none;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.sidebar-menu a:hover {
    color: white;
    background: rgba(255,255,255,0.05);
}

.sidebar-menu a.active {
    color: white;
    background: rgba(37, 99, 235, 0.15);
    border-left-color: var(--primary);
}

.sidebar-menu a i {
    width: 20px;
    text-align: center;
}

.menu-header {
    padding: 12px 20px 6px;
    font-size: 11px;
    text-transform: uppercase;
    color: var(--gray-500);
    letter-spacing: 0.5px;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.user-info {
    display: flex;
    flex-direction: column;
    margin-bottom: 12px;
}

.user-name {
    font-weight: 500;
    color: white;
}

.user-role {
    font-size: 12px;
    color: var(--gray-400);
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--gray-400);
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.2s;
}

.logout-btn:hover {
    color: white;
    background: rgba(255,255,255,0.05);
}

/* Main Content */
.main-content {
    margin-left: 260px;
    flex: 1;
    min-height: 100vh;
}

.top-bar {
    background: white;
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
}

.sidebar-toggle {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--gray-600);
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: background 0.2s;
}

.sidebar-toggle:hover {
    background: var(--gray-100);
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.stock-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--gray-600);
}

.stock-indicator .value {
    font-weight: 600;
    color: var(--gray-800);
}

.time-display {
    font-size: 14px;
    color: var(--gray-500);
}

.page-content {
    padding: 32px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .top-bar {
        padding: 12px 16px;
    }
    
    .page-content {
        padding: 16px;
    }
}

/* Utilities */
.text-center { text-align: center; }
.text-muted { color: var(--gray-500); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}