:root {
    --ui-bg: linear-gradient(180deg, #f6f9fc 0%, #eef3f9 100%);
    --ui-panel: #ffffff;
    --ui-line: #d7e0eb;
    --ui-text: #1f2d3d;
    --ui-muted: #5d6f82;
    --ui-brand: #0d47a1;
    --ui-brand-soft: #e8f0ff;
    --ui-ok: #1e7a3b;
    --ui-warn: #bd6a00;
    --ui-err: #a11c24;
}

body {
    background: var(--ui-bg);
    color: var(--ui-text);
}

.topbar {
    margin: 0 0 12px 0;
    padding: 10px 12px;
    border: 1px solid var(--ui-line);
    border-radius: 12px;
    background: var(--ui-panel);
    box-shadow: 0 6px 18px rgba(13, 71, 161, 0.06);
}

.topbar .title {
    margin: 0 0 6px 0;
    font-size: 26px;
    line-height: 1.2;
    letter-spacing: 0.2px;
}

.topbar .subtitle {
    margin: 0;
    font-size: 13px;
    color: var(--ui-muted);
}

.topnav {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.topnav a {
    display: inline-block;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid #cdd9e7;
    background: #f5f9ff;
    color: var(--ui-brand);
    text-decoration: none;
    font-weight: 600;
    font-size: 13px;
}

.topnav a:hover {
    background: var(--ui-brand-soft);
}

.panel h3,
.sys-box strong,
#statusPanel strong,
.debug-box strong {
    color: #11243a;
}

.sys-card {
    border: 1px solid #d8e3f0;
    border-radius: 9px;
    padding: 9px 10px;
    background: #f8fbff;
    font-size: 13px;
}

.sys-card strong {
    display: block;
    margin-bottom: 4px;
}

#statusPanel,
.log {
    border-color: #d5e1ef;
    background: #fbfdff;
}

.status-item,
.log-line {
    display: flex;
    gap: 8px;
    align-items: baseline;
    border-bottom: 1px dashed #e9eff6;
    padding: 3px 0;
    color: #334556;
}

.status-item:last-child,
.log-line:last-child {
    border-bottom: none;
}

.log-time {
    color: #6e7f92;
    font-size: 12px;
    min-width: 66px;
}

.log-level {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    min-width: 52px;
    color: #556;
}

.log-level.info { color: #35506d; }
.log-level.success { color: var(--ui-ok); }
.log-level.error { color: var(--ui-err); }
.log-level.warn { color: var(--ui-warn); }

.log-message {
    flex: 1;
    word-break: break-word;
}

@media (max-width: 760px) {
    .topbar .title {
        font-size: 22px;
    }
}