* { box-sizing: border-box; }
body {
    font-family: "Microsoft JhengHei", "PingFang TC", Arial, sans-serif;
    background: #f4f7f9;
    margin: 0;
    color: #2c3e50;
}
.topbar {
    background: #1f6f78;
    color: #fff;
    padding: 14px 0;
}
.topbar-inner {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    flex-wrap: wrap;
}
.site-name { font-size: 20px; font-weight: bold; }
.contact-info { font-size: 13px; opacity: 0.9; }
.container {
    max-width: 1000px;
    margin: 20px auto;
    padding: 0 20px 40px;
}
.card {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.1);
    padding: 24px;
    margin-bottom: 20px;
}
h1, h2, h3 { color: #1f6f78; }
table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
}
th, td {
    border: 1px solid #dde5e8;
    padding: 10px;
    text-align: center;
    font-size: 14px;
}
th { background: #eaf3f4; color: #1f6f78; }
tr:hover { background: #f9fcfc; }
.btn {
    display: inline-block;
    padding: 8px 18px;
    background: #1f6f78;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    font-size: 14px;
}
.btn:hover { background: #17565d; }
.btn-danger { background: #c0392b; }
.btn-danger:hover { background: #96281b; }
.btn-secondary { background: #7f8c8d; }
.btn-secondary:hover { background: #626e6f; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
input[type=text], input[type=password], input[type=number], select, input[type=date] {
    padding: 8px;
    border: 1px solid #ccd7da;
    border-radius: 4px;
    font-size: 14px;
    width: 100%;
    max-width: 300px;
}
label { font-weight: bold; display: block; margin: 10px 0 4px; }
.msg-error {
    background: #fdecea;
    color: #c0392b;
    padding: 12px;
    border-radius: 5px;
    margin-bottom: 15px;
    border: 1px solid #f5c6cb;
}
.msg-success {
    background: #eafaf1;
    color: #1e8449;
    padding: 12px;
    border-radius: 5px;
    margin-bottom: 15px;
    border: 1px solid #c3e6cb;
}
.msg-warning {
    background: #fff8e1;
    color: #8a6d3b;
    padding: 12px;
    border-radius: 5px;
    margin-bottom: 15px;
    border: 1px solid #ffe58f;
}
.slot-available { color: #1e8449; font-weight: bold; }
.slot-full { color: #c0392b; }
.nav-links a {
    margin-right: 15px;
    color: #1f6f78;
    text-decoration: none;
    font-weight: bold;
}
.nav-links a:hover { text-decoration: underline; }
.status-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
}
.status-booked { background: #d4edfb; color: #1a5276; }
.status-done { background: #d5f5e3; color: #1e8449; }
.status-cancelled { background: #f0f0f0; color: #7f8c8d; }