:root {
    color-scheme: light;
    --border: #d0d5dd;
    --text: #1d2433;
    --muted: #667085;
    --accent: #2563eb;
    --error: #b42318;
    --warning-bg: #fff7ed;
    --warning-border: #f4a15b;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
    color: var(--text);
    background: #f7f8fa;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    background: #fff;
    border-bottom: 1px solid var(--border);
}

.topbar nav a { margin-left: 16px; }

.container {
    max-width: 720px;
    margin: 32px auto;
    padding: 0 16px;
}

.auth-box {
    max-width: 380px;
    margin: 80px auto;
    padding: 32px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
}

h1 { font-size: 1.4rem; }
h2 { font-size: 1.1rem; margin-top: 28px; }

form label {
    display: block;
    margin-bottom: 14px;
    font-size: 0.9rem;
    color: var(--muted);
}

form input[type="text"],
form input[type="email"],
form input[type="password"],
form select,
form textarea {
    display: block;
    width: 100%;
    margin-top: 6px;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
}

button {
    padding: 8px 18px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
}

button:hover { opacity: 0.9; }

.error {
    color: var(--error);
    font-size: 0.9rem;
}

.warning {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    padding: 12px;
    border-radius: 6px;
    font-size: 0.9rem;
}

.note { font-size: 0.8rem; color: var(--muted); }

table.list, table.detail {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
    background: #fff;
}

table.list th, table.list td,
table.detail th, table.detail td {
    border: 1px solid var(--border);
    padding: 8px 10px;
    text-align: left;
    font-size: 0.9rem;
}

table.detail th { width: 160px; background: #f2f4f7; }

.file-list { list-style: none; padding: 0; }
.file-list li { padding: 8px 0; border-bottom: 1px solid var(--border); }

.message-box {
    background: #f2f4f7;
    padding: 12px;
    border-radius: 6px;
}

code {
    background: #f2f4f7;
    padding: 2px 6px;
    border-radius: 4px;
}