:root {
    color-scheme: light dark;
    font-family: "Inter", "Segoe UI", system-ui, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    --bg: #0f1115;
    --panel: #1b1f2a;
    --border: #2b3244;
    --text: #f2f5ff;
    --muted: #a7b0c2;
    --accent: #6aa8ff;
    --accent-strong: #8cc4ff;
    --success: #3dd598;
    --danger: #ff6b6b;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
}

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 32px;
    border-bottom: 1px solid var(--border);
}

.header-content h1 {
    margin: 0 0 6px 0;
    font-size: 1.75rem;
}

.header-content p {
    margin: 0;
    color: var(--muted);
}

.header-status {
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--panel);
    border: 1px solid var(--border);
    font-size: 0.9rem;
}

.app-main {
    padding: 24px 32px 48px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 20px 24px;
}

.panel h2 {
    margin-top: 0;
}

.connection-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}

.connection-toggle {
    display: flex;
    justify-content: flex-end;
}

#connection-panel.collapsed {
    display: none;
}

button {
    background: var(--accent);
    border: none;
    border-radius: 8px;
    color: #0b111c;
    padding: 10px 16px;
    font-weight: 600;
    cursor: pointer;
}

button.secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

input:disabled,
select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.connection-grid {
    display: grid;
    grid-template-columns: minmax(220px, 1fr) auto auto;
    gap: 16px;
    align-items: end;
}

.device-info {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.device-info dl {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px 18px;
    margin: 0;
}

.device-info dt {
    color: var(--muted);
    font-size: 0.85rem;
}

.device-info dd {
    margin: 0;
    font-weight: 600;
}

.status-card {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 16px;
    background: #121620;
}

.status-label {
    display: block;
    font-size: 0.8rem;
    color: var(--muted);
}

.status-value {
    font-weight: 700;
    color: var(--danger);
}

.status-value.connected {
    color: var(--success);
}

.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tab {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 14px;
    border-radius: 999px;
    cursor: pointer;
}

.tab.active {
    background: var(--accent-strong);
    color: #0b111c;
    border-color: transparent;
}

.tab-panel {
    display: none;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 20px 24px;
}

.tab-panel.active {
    display: block;
}

.io-panels {
    display: grid;
    gap: 16px;
}

.sub-panel {
    background: #121620;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
}

.sub-panel h3 {
    margin-top: 0;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.field span {
    font-size: 0.85rem;
    color: var(--muted);
}

.field input,
.field select,
.field textarea {
    background: #10141d;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    padding: 8px 10px;
    font-size: 0.95rem;
}

.field textarea {
    resize: vertical;
}

.field.span-2 {
    grid-column: span 2;
}

.panel-actions {
    margin-top: 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.slider-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.slider-field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.slider-field span {
    font-size: 0.85rem;
    color: var(--muted);
}

.range-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.range-row input[type="number"] {
    width: 80px;
}

.device-list {
    display: grid;
    gap: 14px;
}

.device-card {
    background: #121620;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.device-card h3 {
    margin: 0 0 4px 0;
}

.device-meta {
    color: var(--muted);
    font-size: 0.85rem;
}

.device-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.button-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    background: var(--accent);
    color: #0b111c;
    padding: 8px 14px;
    border-radius: 8px;
    font-weight: 600;
}

.report-preview {
    margin-top: 16px;
    background: #10141d;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 14px;
}

.report-preview pre {
    margin: 0;
    white-space: pre-wrap;
}

.log {
    min-height: 240px;
    background: #0b0f17;
    border-radius: 12px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    white-space: pre-wrap;
}

.activity-log {
    min-height: 180px;
    background: #0b0f17;
    border-radius: 12px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    white-space: pre-wrap;
}

.hint {
    color: var(--muted);
    font-size: 0.85rem;
    margin-top: 10px;
}

.response-hex {
    background: #0b0f17;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 14px;
    white-space: pre-wrap;
    font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
    font-size: 0.85rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.data-table th,
.data-table td {
    border-bottom: 1px solid var(--border);
    padding: 8px 10px;
    text-align: left;
}

.data-table th {
    color: var(--muted);
    font-weight: 600;
}

.data-table.compact th,
.data-table.compact td {
    padding: 6px 8px;
}

.data-table tr.active {
    background: rgba(106, 168, 255, 0.15);
}

.enum-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.enum-card {
    background: #121620;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 14px;
}

.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 12px 0;
    color: var(--muted);
    font-size: 0.85rem;
}

.legend-swatch {
    width: 12px;
    height: 12px;
    border-radius: 4px;
    display: inline-block;
    margin-right: 6px;
    border: 1px solid var(--border);
}

.legend-header {
    background: #2b3650;
}

.legend-known {
    background: #2f3f36;
}

.legend-marker {
    background: #4b2c2c;
}

.byte-table {
    width: 100%;
    border-collapse: collapse;
    font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
    font-size: 0.8rem;
}

.byte-table th,
.byte-table td {
    border: 1px solid var(--border);
    padding: 4px 6px;
    text-align: center;
}

.byte-table th {
    color: var(--muted);
    font-weight: 600;
    background: #141a26;
}

.byte-cell {
    display: inline-block;
    min-width: 22px;
}

.byte-cell.header {
    background: #2b3650;
    color: #e8f0ff;
    border-radius: 4px;
    padding: 2px 4px;
}

.byte-cell.known {
    background: #2f3f36;
    color: #e8f0ff;
    border-radius: 4px;
    padding: 2px 4px;
}

.byte-cell.marker {
    background: #4b2c2c;
    color: #ffe2e2;
    border-radius: 4px;
    padding: 2px 4px;
}

.app-footer {
    padding: 12px 32px 32px;
    color: var(--muted);
    font-size: 0.85rem;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg: #f5f6fb;
        --panel: #ffffff;
        --border: #d8dde8;
        --text: #1b2232;
        --muted: #5d6b86;
        --accent: #447cf5;
        --accent-strong: #7aa5ff;
        --success: #0e9f6e;
        --danger: #d64545;
    }
    .report-preview,
    .log,
    .field input,
    .field select,
    .field textarea {
        background: #f6f7fb;
    }
    .sub-panel {
        background: #f7f9ff;
    }
    button {
        color: #f5f6fb;
    }
    .button-link {
        color: #f5f6fb;
    }
    .device-card {
        background: #f7f9ff;
    }
}