:root {
    color-scheme: dark;
    --bg: #1b1b1e;
    --panel: #25252a;
    --border: #3b3b44;
    --text: #e6e6ea;
    --muted: #9a9aa6;
    --accent: #3fa35b;
    --warn: #d0a23a;
    --bad: #c9474a;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 15px/1.5 system-ui, sans-serif;
}

main {
    max-width: 560px;
    margin: 40px auto;
    padding: 0 16px;
}

h1 {
    margin: 0 0 4px;
    font-size: 24px;
}

h2 {
    margin: 0 0 8px;
    font-size: 17px;
}

.identity {
    margin: 0 0 20px;
    color: var(--muted);
}

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 16px;
}

.row {
    display: grid;
    grid-template-columns: 110px 1fr auto;
    align-items: center;
    gap: 12px;
    margin: 14px 0;
}

.row > button {
    grid-column: 1 / -1;
    justify-self: start;
}

button, select {
    font: inherit;
    color: var(--text);
    background: #33333b;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 6px 12px;
}

button:hover:not(:disabled) {
    background: #3d3d47;
}

button:disabled, select:disabled {
    opacity: 0.5;
}

select {
    grid-column: 2 / -1;
}

.status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 4px;
    background: #1f1f23;
    font-weight: 600;
}

.status .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--muted);
    flex: none;
}

.status[data-state="transmitting"] .dot {
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent);
}

.status[data-state="waiting"] .dot {
    background: var(--warn);
}

.status[data-state="blocked"] .dot,
.status[data-state="error"] .dot {
    background: var(--bad);
}

.meter {
    position: relative;
    grid-column: 2 / -1;
    height: 10px;
    border-radius: 5px;
    background: #1f1f23;
    overflow: hidden;
}

.meter-fill {
    height: 100%;
    width: 0;
    background: var(--accent);
    transition: width 60ms linear;
}

.meter-gate {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--warn);
}

.hint {
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 13px;
}

code {
    font-size: 13px;
}