:root {
    --primary: #3D315B;
    --primary-hover: #444B6E;
    --secondary: #708B75;
    --secondary-hover: #9AB87A;
    --background: #F8FAFC; /* Slightly cleaner blue-ish gray */
    --surface: #FFFFFF;
    --text: #0F172A; /* Darker slate for better legibility */
    --text-light: #64748B;
    --danger: #EF4444;
    --warning: #F59E0B;
    --success: #10B981;
    --border: #E2E8F0;
    --accent: #646464;
    --radius: 12px;
}

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

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

.navbar {
    background: var(--surface);
    padding: 1rem 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
    text-decoration: none;
}

.nav-links a {
    margin-left: 1.5rem;
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary);
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

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

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.2s, transform 0.1s;
    text-align: center;
}

.btn:active {
    transform: translateY(1px);
}

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

.btn-primary:hover {
    filter: brightness(1.1);
}

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

.btn-secondary:hover {
    filter: brightness(1.1);
}

.grid-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

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

.grid-table th {
    background-color: #F9FAFB;
    font-weight: 600;
    color: var(--text-light);
}

.grid-input {
    width: 100px;
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: 6px;
}

/* Glassmorphism modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background: var(--surface);
    padding: 2rem;
    border-radius: var(--radius);
    max-width: 400px;
    width: 100%;
    transform: translateY(20px);
    transition: transform 0.3s ease;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
}

.hidden {
    display: none !important;
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.alert-danger {
    background-color: #FEF2F2;
    color: #991B1B;
    border: 1px solid #FEE2E2;
}

.alert-success {
    background-color: #F0FDF4;
    color: #166534;
    border: 1px solid #DCFCE7;
}

.alert-warning {
    background-color: #FFFBEB;
    color: #92400E;
    border: 1px solid #FEF3C7;
}

.alert-info {
    background-color: #EFF6FF;
    color: #1E40AF;
    border: 1px solid #DBEAFE;
}