:root {
    color-scheme: light;
    --bg: #f3f5f7;
    --surface: #ffffff;
    --border: #dfe4e8;
    --text: #1f2933;
    --muted: #697386;
    --accent: #c53d31;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 14px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

a { color: inherit; text-decoration: none; }
button, input { font: inherit; }

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 54px;
    padding: 0 24px;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
}

.brand { font-size: 18px; font-weight: 700; }
.header-meta { color: var(--muted); }
.header-actions { display: flex; align-items: center; gap: 14px; }
.inline-form { display: inline; margin: 0; }
.link-button { padding: 0; border: 0; background: none; color: var(--muted); cursor: pointer; }
.user-chip { display: inline-flex; align-items: center; gap: 8px; }
.avatar {
    display: inline-grid;
    width: 32px;
    height: 32px;
    place-items: center;
    border-radius: 50%;
    background: #202832;
    color: #fff;
    font-size: 12px;
    font-weight: 700;
}
.avatar-large { width: 52px; height: 52px; font-size: 17px; }

.page-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 24px auto;
}

.card {
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
}

.card h1 { margin: 0 0 8px; font-size: 22px; }
.muted { color: var(--muted); }

.status-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 20px;
}

.status-item {
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 4px;
}

.status-item strong { display: block; margin-bottom: 4px; }
.status-ok { color: #19733b; }

.auth-card { width: min(440px, 100%); margin: 40px auto; }
.form-stack { display: grid; gap: 14px; margin-top: 20px; }
.form-stack label { display: grid; gap: 6px; font-weight: 600; }
.form-stack input[type="text"],
.form-stack input[type="email"],
.form-stack input[type="password"] {
    width: 100%;
    min-height: 42px;
    padding: 8px 10px;
    border: 1px solid #cbd2d9;
    border-radius: 4px;
    background: #fff;
    color: var(--text);
}
.form-stack input:focus { outline: 2px solid rgba(197, 61, 49, .2); border-color: var(--accent); }
.button {
    display: inline-flex;
    min-height: 40px;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border: 1px solid var(--accent);
    border-radius: 4px;
    background: var(--accent);
    color: #fff;
    cursor: pointer;
}
.button:disabled { cursor: not-allowed; opacity: .65; }
.button-small { min-height: 32px; padding: 4px 12px; }
.button-secondary { border-color: #cbd2d9; background: #fff; color: var(--text); white-space: nowrap; }
.checkbox-row { display: flex !important; grid-template-columns: auto 1fr; align-items: center; font-weight: 400 !important; }
.code-row, .captcha-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; }
.captcha-refresh { height: 44px; padding: 0; border: 1px solid var(--border); background: #fff; cursor: pointer; }
.captcha-refresh img { display: block; }
.form-links { display: flex; justify-content: space-between; margin-top: 18px; color: var(--accent); }
.alert { margin: 0 0 14px; padding: 10px 12px; border: 1px solid; border-radius: 4px; }
.alert-error { border-color: #efb2ad; background: #fff2f0; color: #9d2e25; }
.alert-success { border-color: #a8d5b7; background: #effaf2; color: #176934; }
.alert-info { border-color: #b8c8d8; background: #f2f7fb; }
.settings-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.profile-card { grid-column: 1 / -1; display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 14px; }
.profile-card h1, .card h2 { margin: 0; }
.profile-list { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 8px 0 0; }
.profile-list div { padding: 10px 0; border-top: 1px solid var(--border); }
.profile-list dt { color: var(--muted); }
.profile-list dd { margin: 2px 0 0; }

@media (max-width: 720px) {
    .site-header { padding: 0 16px; }
    .header-meta { display: none; }
    .page-shell { width: min(100% - 20px, 1180px); margin-top: 12px; }
    .status-grid { grid-template-columns: 1fr; }
    .settings-grid { grid-template-columns: 1fr; }
    .profile-list { grid-template-columns: 1fr; }
}