:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --secondary: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --radius: 0.75rem;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.2s;
}

/* Auth Layout */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.auth-card {
    background: var(--bg-card);
    width: 100%;
    max-width: 450px;
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h1 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--text-muted);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Select Styling */
select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1rem;
    font-weight: 600;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    width: 100%;
}

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

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

/* Notifications */
.alert {
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}

.alert-danger {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* Sidebar Layout */
.layout-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    background: #1e293b;
    color: white;
    padding: 1.5rem;
    position: sticky;
    top: 0;
    height: 100vh;
}

.sidebar-logo {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 2.5rem;
    color: #38bdf8;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-menu {
    list-style: none;
}

.nav-item {
    margin-bottom: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    color: #94a3b8;
}

.nav-link:hover, .nav-link.active {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.main-content {
    flex: 1;
    padding: 2rem;
    background: var(--bg-main);
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

/* Pagination */
.pagination {
    display: flex;
    gap: 0.5rem;
    list-style: none;
    margin-top: 1.5rem;
    justify-content: center;
}

.pagination li {
    display: inline-block;
}

.pagination li a, .pagination li span {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    background: white;
    color: var(--text-main);
    font-size: 0.875rem;
    font-weight: 500;
}

.pagination li.active span {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.pagination li.disabled span {
    color: var(--text-muted);
    background: #f8fafc;
    cursor: not-allowed;
}