body {
    font-family: "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: #222;
    background-color: #f4f6f8;
    margin: 0;
}

a {
    color: #0077cc;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    max-width: 960px;
    margin: 40px auto;
    background: #fff;
    border-radius: 6px;
    padding: 24px 28px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.nav {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.nav a {
    font-weight: bold;
}

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

th, td {
    border: 1px solid #e0e0e0;
    padding: 8px 10px;
}

th {
    background: #f0f4f8;
    text-align: left;
}

form .field {
    margin-bottom: 16px;
}

form label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
}

form input[type="text"],
form input[type="number"],
form input[type="date"],
form input[type="password"],
form textarea,
form select {
    width: 100%;
    padding: 8px 10px;
    border-radius: 4px;
    border: 1px solid #bfc3c7;
    font-size: 15px;
    box-sizing: border-box;
}

form textarea {
    min-height: 80px;
    resize: vertical;
}

.actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.flash {
    padding: 12px 16px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.flash-success {
    background: #ecf8ef;
    color: #1b7d2b;
    border: 1px solid #b7e1c2;
}

.flash-error {
    background: #fdecea;
    color: #a2271a;
    border: 1px solid #f3c5c0;
}

.btn {
    display: inline-block;
    background: #0077cc;
    color: #fff;
    padding: 8px 16px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 15px;
}

.btn.secondary {
    background: #6c757d;
}

.btn.danger {
    background: #d9534f;
}

.tabs {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.tabs button {
    background: #dce4ec;
    border: none;
    padding: 8px 14px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 15px;
}

.tabs button.active {
    background: #0077cc;
    color: #fff;
}