body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    margin: 0;
    padding: 0;
    background: #f5f5f7;
}

.navbar {
    background: #1f2933;
    color: #fff;
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar a {
    color: #e5e7eb;
    margin-left: 12px;
    text-decoration: none;
    font-size: 14px;
}

.container {
    max-width: 1000px;
    margin: 20px auto;
    background: #ffffff;
    padding: 20px 24px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

h1, h2, h3 {
    color: #111827;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
    font-size: 14px;
}

table th, table td {
    border: 1px solid #e5e7eb;
    padding: 8px;
    text-align: left;
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 12px;
    background: #e5e7eb;
    color: #374151;
}

.badge.success { background: #dcfce7; color: #166534; }
.badge.warning { background: #fef3c7; color: #92400e; }
.badge.danger { background: #fee2e2; color: #b91c1c; }

.btn {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 8px;
    border: none;
    background: #2563eb;
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    cursor: pointer;
}

.btn.secondary {
    background: #6b7280;
}

.btn.small {
    padding: 4px 8px;
    font-size: 12px;
}

.flash {
    padding: 8px 12px;
    border-radius: 8px;
    margin-bottom: 12px;
    font-size: 13px;
}

.flash.success { background: #dcfce7; color: #166534; }
.flash.danger { background: #fee2e2; color: #b91c1c; }
.flash.info { background: #e0f2fe; color: #075985; }
.flash.warning { background: #fef3c7; color: #92400e; }

form label {
    display: block;
    margin-top: 8px;
    font-size: 14px;
    color: #374151;
}

form input[type="text"],
form input[type="password"],
form input[type="number"],
form textarea {
    width: 100%;
    padding: 6px 8px;
    border-radius: 8px;
    border: 1px solid #d1d5db;
    margin-top: 4px;
    font-size: 14px;
}

form input[type="file"] {
    margin-top: 6px;
}

form textarea {
    min-height: 80px;
}