:root {
    color-scheme: light;
    --bg: #f6f7f9;
    --panel: #ffffff;
    --text: #17202a;
    --muted: #667085;
    --line: #d9dee7;
    --primary: #1769e0;
    --primary-dark: #0f55b8;
    --danger: #c93333;
    --ok-bg: #e8f7ef;
    --ok-text: #126b3f;
    --err-bg: #fdecec;
    --err-text: #9e2323;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
}

button, input, textarea {
    font: inherit;
}

button {
    border: 1px solid var(--line);
    background: #fff;
    color: var(--text);
    border-radius: 8px;
    padding: 9px 13px;
    cursor: pointer;
}

button:hover { border-color: #aeb8c8; }
.primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    font-weight: 700;
}
.primary:hover { background: var(--primary-dark); }
.danger { color: var(--danger); border-color: #efb3b3; }
.ghost { background: transparent; }

input, textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px 12px;
    background: #fff;
    color: var(--text);
}
textarea {
    resize: vertical;
    line-height: 1.55;
}

label {
    display: grid;
    gap: 7px;
    color: var(--muted);
    font-size: 14px;
}

h1, h2, h3, p { margin-top: 0; }
h1 { font-size: 28px; margin-bottom: 8px; }
h2 { font-size: 20px; margin-bottom: 18px; }
h3 { font-size: 16px; margin: 20px 0 10px; }
p { color: var(--muted); line-height: 1.65; }
small, .muted { color: var(--muted); }

.auth-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.auth-card {
    width: min(420px, 100%);
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 28px;
    box-shadow: 0 18px 55px rgba(17, 24, 39, .08);
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 5;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 14px 26px;
    background: rgba(255, 255, 255, .92);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(12px);
}
.topbar div { display: flex; gap: 12px; align-items: baseline; }
.topbar span { color: var(--muted); font-size: 14px; }

.layout {
    width: min(1180px, calc(100% - 32px));
    margin: 24px auto 60px;
    display: grid;
    gap: 18px;
}

.panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 22px;
}

.hero-panel {
    display: grid;
    grid-template-columns: 1fr minmax(280px, 520px);
    align-items: end;
    gap: 24px;
}

.grid.two {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.stack { display: grid; gap: 14px; }
.logout-line {
    margin-top: 12px;
}
.copy-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
}

.notice {
    border-radius: 8px;
    padding: 12px 14px;
    background: var(--ok-bg);
    color: var(--ok-text);
    border: 1px solid rgba(18, 107, 63, .18);
}
.notice.error {
    background: var(--err-bg);
    color: var(--err-text);
    border-color: rgba(158, 35, 35, .16);
}

.source-list, .node-list, .table, .mini-list, .ticket-list, .message-list {
    display: grid;
    gap: 10px;
}

.source-item, .node-row, .user-row, .mini-item, .ticket-item {
    display: grid;
    gap: 12px;
    align-items: center;
    padding: 13px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
}

.source-item {
    grid-template-columns: 1fr auto;
}
.source-item div:first-child {
    display: grid;
    gap: 5px;
}
.source-item em {
    color: var(--danger);
    font-style: normal;
    font-size: 13px;
}

.nodes-form {
    display: grid;
    gap: 12px;
}

.node-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-bottom: 4px;
}
.node-toolbar.bottom {
    justify-content: flex-end;
    padding-top: 8px;
}

.source-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 16px;
}
.source-heading h3 {
    margin: 0;
}

.node-row {
    grid-template-columns: 112px minmax(220px, 1fr) minmax(160px, 320px);
}
.node-row.disabled {
    opacity: .58;
}

.switch {
    display: inline-flex;
    align-items: center;
    grid-template-columns: none;
    gap: 9px;
    color: var(--text);
    cursor: pointer;
    user-select: none;
}
.switch input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}
.switch span {
    width: 42px;
    height: 24px;
    border-radius: 999px;
    background: #c8d0dc;
    position: relative;
    transition: background .16s ease;
}
.switch span::after {
    content: "";
    position: absolute;
    top: 3px;
    left: 3px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 1px 4px rgba(17, 24, 39, .2);
    transition: transform .16s ease;
}
.switch input:checked + span {
    background: var(--primary);
}
.switch input:checked + span::after {
    transform: translateX(18px);
}
.switch b {
    min-width: 32px;
    font-size: 14px;
}

.user-row {
    grid-template-columns: minmax(190px, 260px) minmax(260px, 1fr) auto;
}
.user-row div:first-child {
    display: grid;
    gap: 5px;
}

.mini-item {
    align-items: start;
}
.mini-item p, .message-item p {
    margin: 6px 0 0;
    color: var(--text);
}

.ticket-item {
    align-items: stretch;
}
.ticket-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}
.ticket-head div {
    display: grid;
    gap: 5px;
}
.message-item {
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 11px;
    background: #fbfcfe;
}
.message-item.admin {
    background: #eef5ff;
    border-color: #cddff8;
}
.reply-form {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px;
}

.actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.actions form { margin: 0; }

.public-nodes {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.public-nodes span {
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 7px 11px;
    background: #fbfcfe;
}

@media (max-width: 820px) {
    .hero-panel, .grid.two, .source-item, .node-row, .user-row {
        grid-template-columns: 1fr;
    }
    .copy-row, .reply-form {
        grid-template-columns: 1fr;
    }
    .node-toolbar, .source-heading, .ticket-head {
        align-items: stretch;
        flex-direction: column;
    }
    .topbar {
        align-items: flex-start;
        padding: 14px 16px;
    }
    .topbar div {
        display: grid;
        gap: 4px;
    }
}