:root {
    --bg: #f4f6f8;
    --bg-elev: #ffffff;
    --bg-inset: #f8fafc;
    --line: #d7dee6;
    --text: #1f2933;
    --muted: #5b6775;
    --accent: #2563eb;
    --accent-ink: #ffffff;
    --ok: #157347;
    --err: #b42318;
    --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 20px rgba(16, 24, 40, .06);
    --radius: 12px;
    color-scheme: light;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    min-height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: "Segoe UI", "Helvetica Neue", sans-serif;
    font-size: 15px;
    line-height: 1.45;
}

body.is-busy .btn { opacity: .55; pointer-events: none; }

a { color: inherit; }

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 22px;
    border-bottom: 1px solid var(--line);
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 2;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand strong, .brand small { display: block; }
.brand small { color: var(--muted); letter-spacing: .04em; }

.mark {
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    border-radius: 8px;
    background: var(--accent);
    color: var(--accent-ink);
    font-weight: 700;
}

.nav { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.nav form { margin: 0; }
.nav-user { color: var(--muted); padding: 0 6px; }

.login-body .page { min-height: calc(100vh - 80px); align-content: center; }
.login-card { width: min(420px, 100%); margin: 24px auto; }

.nav-link {
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 8px;
    color: var(--muted);
}

.nav-link.active, .nav-link:hover {
    background: #e8eef8;
    color: var(--text);
}

.page {
    width: min(1120px, calc(100% - 28px));
    margin: 22px auto 48px;
    display: grid;
    gap: 16px;
}

.card {
    background: var(--bg-elev);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 18px;
    box-shadow: var(--shadow);
}

.section-head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: flex-start;
}

.connect-bar { padding: 14px 16px; }
.connect-form {
    display: grid;
    grid-template-columns: minmax(160px, 1.4fr) minmax(140px, 1.2fr) 110px auto;
    gap: 12px;
    align-items: end;
}
.connect-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.port-field { max-width: 110px; }

.work-card { padding: 14px 16px 16px; }
.tab-panel { display: grid; gap: 12px; }
.tab-panel[hidden] { display: none; }
.block {
    background: var(--bg-inset);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 14px;
    display: grid;
    gap: 12px;
}
.block h2 { margin: 0; }

h1, h2 { margin: 0 0 8px; font-weight: 650; }
h1 { font-size: 1.35rem; }
h2 { font-size: 1.05rem; }

.muted, .hint { color: var(--muted); }
.hint { margin: 0; }

.stack { display: grid; gap: 12px; align-content: start; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    align-items: end;
}

label { display: grid; gap: 6px; color: var(--muted); font-size: .92rem; }
.check { display: flex; align-items: center; gap: 8px; min-height: 42px; }

input, select, button { font: inherit; color: var(--text); }

input, select {
    width: 100%;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 9px 10px;
}

input:focus, select:focus {
    outline: 2px solid rgba(37, 99, 235, .25);
    border-color: var(--accent);
}

.field-action { display: flex; align-items: end; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }

.btn {
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 8px;
    padding: 8px 14px;
    cursor: pointer;
}

.btn:hover { border-color: #9aa8b8; background: #f8fafc; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 650; }
.btn.primary:hover { background: #1d4ed8; border-color: #1d4ed8; }
.btn.danger { background: #fff; color: var(--err); border-color: #f0b4af; }
.btn.danger:hover { background: #fff5f4; }
.btn.ghost { background: transparent; }

.status {
    margin: 4px 0 0;
    padding: 10px 12px;
    border-radius: 8px;
    background: var(--bg-inset);
    border: 1px solid var(--line);
    white-space: pre-wrap;
}

.status.ok { color: var(--ok); background: #f0f8f3; border-color: #c8e2d2; }
.status.err { color: var(--err); background: #fff5f4; border-color: #f0b4af; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
    border: 1px solid var(--line);
    background: #fff;
    color: var(--text);
    border-radius: 8px;
    padding: 6px 10px;
    cursor: pointer;
}

.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 0 0 14px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
}
.tab-btn { border-radius: 8px; }
.tab-btn.active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: .85rem; }
td .btn { padding: 4px 10px; }

.log-list { display: grid; gap: 8px; max-height: 360px; overflow: auto; }
.log-item {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--bg-inset);
    padding: 8px 10px;
}
.log-item header { color: var(--muted); font-size: .85rem; margin-bottom: 6px; }
.log-item.ok header { color: var(--ok); }
.log-item.err header { color: var(--err); }
.log-item pre, .docs pre {
    margin: 0;
    white-space: pre-wrap;
    word-break: break-word;
    font-family: Consolas, ui-monospace, monospace;
    font-size: .82rem;
}

.docs h1 { font-size: 1.7rem; }
.docs h2 { margin-top: 1.4rem; font-size: 1.2rem; }
.docs h3 { margin-top: 1rem; }
.docs a { color: var(--accent); }
.docs code {
    font-family: Consolas, ui-monospace, monospace;
    background: #eef2f6;
    padding: .1em .35em;
    border-radius: 4px;
}
.docs pre {
    background: #f8fafc;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 12px;
    overflow-x: auto;
}
.docs pre code { background: transparent; padding: 0; }
.docs table { margin: 8px 0 16px; }
.docs blockquote {
    margin: 0;
    padding-left: 12px;
    border-left: 3px solid var(--accent);
    color: var(--muted);
}

@media (max-width: 900px) {
    .connect-form { grid-template-columns: 1fr 1fr; }
    .port-field { max-width: none; }
    .connect-actions { grid-column: 1 / -1; }
}

@media (max-width: 800px) {
    .split { grid-template-columns: 1fr; }
    .topbar { align-items: flex-start; flex-direction: column; }
}