:root {
    --primary-color: #800000;
    /* Maroon */
    --secondary-color: #5c0000;
    /* Darker Maroon for Hover */
    --accent-color: #d4af37;
    /* Gold */
    --dark-bg: #111827;
    /* Gray 900 */
    --light-bg: #f8fafc;
    /* Slate 50 */
    --sidebar-width: 260px;
    --header-height: 70px;
    --card-bg: #ffffff;
    --text-color: #333333;
    /* Darker Text */
    --text-muted: #64748b;
    /* Slate 500 */
    --border-color: #e2e8f0;
    /* Slate 200 */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--light-bg);
    color: var(--text-color);
    overflow-x: hidden;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    background-color: var(--card-bg);
    border-right: 1px solid var(--border-color);
    z-index: 100;
    transition: all 0.3s ease;
}

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

.sidebar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: -0.025em;
}

.sidebar-menu {
    padding: 1rem 0;
    list-style: none;
    height: calc(100vh - var(--header-height));
    overflow-y: auto;
    scrollbar-width: thin;
    /* Firefox */
    scrollbar-color: var(--text-muted) transparent;
}

/* Custom Scrollbar for Webkit */
.sidebar-menu::-webkit-scrollbar {
    width: 6px;
}

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

.sidebar-menu::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 20px;
}

.sidebar-menu li a {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
}

.sidebar-menu li a:hover,
.sidebar-menu li a.active {
    color: var(--primary-color);
    background-color: #fff5f5;
    border-right: 3px solid var(--primary-color);
}

.sidebar-menu li a i {
    margin-right: 0.75rem;
    font-size: 1.25rem;
}

.menu-header {
    padding: 1.5rem 1.5rem 0.5rem;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 2rem;
    min-height: 100vh;
    transition: all 0.3s ease;
}

/* Header */
.top-header {
    height: var(--header-height);
    background-color: var(--card-bg);
    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: 90;
}

.header-search input {
    background-color: var(--light-bg);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    width: 300px;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

/* Component Styles */
.card-custom {
    background: var(--card-bg);
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card-custom:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

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

/* Login Page Specific */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
}

.login-card {
    width: 100%;
    max-width: 450px;
    padding: 2.5rem;
    background: white;
    border-radius: 1rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}