* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, "Segoe UI", Arial, sans-serif;
    background: #f4f5f7;
    color: #1f2933;
    margin: 0;
}

.navbar {
    background: #1f2d3d;
    color: #fff;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.navbar a {
    color: #fff;
    text-decoration: none;
    margin-right: 1rem;
    font-size: 0.95rem;
}

.navbar a:hover {
    text-decoration: underline;
}

.navbar .brand {
    font-weight: 700;
    margin-right: 2rem;
}

.container {
    max-width: 960px;
    margin: 1.5rem auto;
    padding: 0 1rem;
}

.card {
    background: #fff;
    border-radius: 6px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

h1, h2, h3 {
    margin-top: 0;
}

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

label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
}

input[type=text], input[type=email], input[type=password], input[type=date], select, textarea {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #cbd2d9;
    border-radius: 4px;
    font-size: 1rem;
}

textarea {
    min-height: 100px;
    resize: vertical;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    text-decoration: none;
}

.btn-primary {
    background: #2563eb;
    color: #fff;
}

.btn-danger {
    background: #dc2626;
    color: #fff;
}

.btn-secondary {
    background: #e4e7eb;
    color: #1f2933;
}

.flash {
    padding: 0.75rem 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.flash-success {
    background: #d1fae5;
    color: #065f46;
}

.flash-error {
    background: #fee2e2;
    color: #991b1b;
}

.errors {
    background: #fee2e2;
    color: #991b1b;
    padding: 0.75rem 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

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

th, td {
    text-align: left;
    padding: 0.6rem 0.5rem;
    border-bottom: 1px solid #e4e7eb;
    font-size: 0.9rem;
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-pending { background: #fef3c7; color: #92400e; }
.badge-in_progress { background: #dbeafe; color: #1e40af; }
.badge-completed { background: #d1fae5; color: #065f46; }

.badge-low { background: #e5e7eb; color: #374151; }
.badge-medium { background: #fde68a; color: #92400e; }
.badge-high { background: #fecaca; color: #991b1b; }

.filters {
    display: flex;
    gap: 0.75rem;
    align-items: end;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.filters .form-group {
    margin-bottom: 0;
}

.actions form {
    display: inline;
}

.pagination {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-box {
    background: #f8fafc;
    border: 1px solid #e4e7eb;
    border-radius: 6px;
    padding: 1rem;
    text-align: center;
}

.stat-box .value {
    font-size: 1.6rem;
    font-weight: 700;
}

.modal {
    border: none;
    border-radius: 8px;
    padding: 1.5rem;
    max-width: 480px;
    width: 90%;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.modal::backdrop {
    background: rgba(15, 23, 42, 0.5);
}

.modal h3 {
    margin-top: 0;
}

.stat-box .label {
    font-size: 0.8rem;
    color: #52606d;
}

@media (max-width: 600px) {
    table, thead, tbody, th, td, tr {
        display: block;
    }
    thead {
        display: none;
    }
    td {
        border: none;
        padding: 0.3rem 0.5rem;
    }
    tr {
        border-bottom: 1px solid #e4e7eb;
        padding: 0.5rem 0;
    }
    td::before {
        content: attr(data-label);
        font-weight: 600;
        display: block;
        font-size: 0.75rem;
        color: #52606d;
    }
}