:root {
    --primary: #10b981;
    --primary-hover: #059669;
    --bg-color: #f3f4f6;
    --sidebar-bg: #111827;
    --sidebar-color: #9ca3af;
    --sidebar-color-active: #ffffff;
    --card-bg: #ffffff;
    --text-color: #1f2937;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --border-radius: 0.5rem;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-color);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
    color: #fff;
    font-size: 1.25rem;
    font-weight: 700;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
}

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav .nav-link {
    display: block;
    padding: 0.75rem 1.5rem;
    color: var(--sidebar-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
}

.sidebar-nav .nav-link:hover, .sidebar-nav .nav-link.active {
    color: var(--sidebar-color-active);
    background-color: rgba(255, 255, 255, 0.05);
    border-left: 3px solid var(--primary);
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.user-name {
    font-size: 0.875rem;
    color: #fff;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.topbar {
    background-color: var(--card-bg);
    padding: 1.5rem 2rem;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.topbar-title h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.content-wrapper {
    padding: 2rem;
    flex: 1;
}

/* Cards */
.card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.2s, transform 0.1s;
    border: none;
}

.btn:active {
    transform: scale(0.98);
}

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

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

.btn-logout {
    color: #ef4444;
    background-color: rgba(239, 68, 68, 0.1);
    width: 100%;
}

.btn-logout:hover {
    background-color: #ef4444;
    color: white;
}

/* Tables */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: #f9fafb;
    font-weight: 600;
    color: var(--text-muted);
}

tr:hover td {
    background-color: #f9fafb;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.form-control {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    outline: none;
    transition: border-color 0.2s;
    font-family: inherit;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}