:root {
    --bg: #ffffff;
    --text: #333;
    --main-bg: #ffffff;
    --sidebar-bg: #f9f9f9;
    --link: #333;
    --link-hover: #000;
    --input-bg: #f5f5f5;
    --input-border: #ccc;
    --input-hover: #e0e0e0;
    --input-active: #d6d6d6;
    --table-border: #ddd;
    --table-hover: #f5f5f5;
    --table-important: #e0e0e0;
}

[data-theme="dark"] {
    --bg: #1e1e1e;
    --text: #fff;
    --main-bg: #2c2c2c;
    --sidebar-bg: #333;
    --link: #eaeaea;
    --link-hover: #ffffff;
    --input-bg: #444;
    --input-border: #666;
    --input-hover: #555;
    --input-active: #666;
    --table-border: #555;
    --table-hover: #3a3a3a;
    --table-important: #444;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 8px;
}

*::-webkit-scrollbar {
    display: none;
}

#main {
    background-color: var(--main-bg);
    padding: 1rem;
    box-sizing: border-box;
    overflow-y: auto;
    border-radius: 12px;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.05);
    margin-bottom: 8px;
}

input, button, a {
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 6px;
    padding: 6px 10px;
    margin: 4px 0;
    cursor: pointer;
    color: var(--text);
    font-size: 14px;
    transition: background-color 0.2s ease, transform 0.1s;
}

input:hover, button:hover, a:hover {
    background-color: var(--input-hover);
}

input:active, button:active, a:active {
    background-color: var(--input-active);
    transform: scale(0.98);
}

#sidebar {
    background-color: var(--sidebar-bg);
    border-radius: 12px;
    padding: 1rem;
    box-sizing: border-box;
    color: var(--text);
    box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.05);
    margin-right: 8px;
}

#sidebar .menu-list a {
    color: var(--link);
    text-decoration: none;
    font-size: 16px;
    font-weight: bold;
    display: block;
    margin: 4px 0;
}

#sidebar .menu-list a:hover {
    color: var(--link-hover);
}

#seatDisplay {
    margin-top: 12px;
    text-align: center;
    width: 100%;
    overflow-x: auto;
}

td {
    height: calc(90vw / 15);
    background-color: var(--main-bg);
    border-radius: 6px;
    padding: 4px;
    font-size: 14px;
    text-align: center;
    border: 1px solid var(--table-border);
    color: var(--text);
}

td:hover {
    background-color: var(--table-hover);
}

td.important {
    background-color: var(--table-important);
    font-weight: bold;
}

label {
    font-size: 13px;
    margin-bottom: 2px;
    display: inline-block;
    color: var(--text);
}