:root {
    --bg: #08090c;
    --surface: #0e1016;
    --border: #181c24;
    --accent: #3ddc84;
    --cyan: #5ab4c5;
    --warn: #c44;
    --text: #889;
    --bright: #bcc;
    --dim: #3a3f4a;
    --font: 'SF Mono', 'Menlo', 'Consolas', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    background: var(--bg);
    color: var(--text);
    font: 10px/1.3 var(--font);
    overflow: hidden;
    height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/*
 * Layout matches PDF page 1 exactly:
 *
 * ┌──────┬──────────────────────────────────────────┐
 * │      │ TONAL AMPLITUDES (thin bar)              │  row 1: 20px
 * │ WHEEL├──────────────────────────────────────────┤
 * │      │ WIDEBAND LOFAR GRAM                      │  row 2: ~30%
 * ├──────┴──────────────────────────────────────────┤
 * │ BEARING-TIME RECORD                             │  row 3: ~20%
 * ├────────────────┬──────────┬─────────────────────┤
 * │ LOFAR BAND 1   │ DOPPLER1 │ TONAL AMPS (brg)   │  row 4-6: ~50%
 * │ LOFAR BAND 2   │ DOPPLER2 │ BROADBAND NOISE    │
 * │ LOFAR BAND 3   │ DOPPLER3 │ (bearing waterfall) │
 * └────────────────┴──────────┴─────────────────────┘
 * ┌─────────────────────────────────────────────────┐
 * │ CONTROLS                                        │  fixed 26px
 * └─────────────────────────────────────────────────┘
 */

#app {
    display: grid;
    height: calc(100vh - 26px);
    grid-template-rows: 22px 20px 1fr 0.7fr 1fr;
    grid-template-columns: 80px 1fr 0.35fr 240px;
    gap: 1px;
    background: var(--border);
}

/* Row 1: status bar */
#status-bar {
    grid-column: 1 / -1;
    grid-row: 1;
    background: var(--surface);
    display: flex;
    align-items: center;
    padding: 0 10px;
    gap: 14px;
    font-size: 9px;
    letter-spacing: 0.03em;
    color: var(--dim);
}
#status-bar span { white-space: nowrap; }
#status-bar .val { color: var(--bright); }
#status-bar .warn { color: var(--warn); }

/* Row 2: tonal amplitudes bar + color wheel top */
#colorwheel-panel {
    grid-row: 2 / 4;
    grid-column: 1;
    background: var(--surface);
    display: flex;
    align-items: center;
    justify-content: center;
}

#tonal-bar {
    grid-row: 2;
    grid-column: 2 / -1;
    background: var(--surface);
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--border);
}
#tonal-bar .panel-label { top: 1px; font-size: 8px; }

/* Row 3: wideband LOFAR gram */
#lofar-panel {
    grid-row: 3;
    grid-column: 2 / -1;
    background: var(--bg);
    position: relative;
    overflow: hidden;
}

/* Row 4: bearing-time record */
#btr-panel {
    grid-row: 4;
    grid-column: 1 / -1;
    background: var(--bg);
    position: relative;
    overflow: hidden;
}

/* Row 5: bottom section — 3 columns */
#subband-col {
    grid-row: 5;
    grid-column: 1 / 3;
    display: grid;
    grid-template-rows: 1fr 1fr 1fr;
    gap: 1px;
    background: var(--border);
}

#doppler-col {
    grid-row: 5;
    grid-column: 3;
    display: grid;
    grid-template-rows: 1fr 1fr 1fr;
    gap: 1px;
    background: var(--border);
}

#broadband-col {
    grid-row: 5;
    grid-column: 4;
    display: grid;
    grid-template-rows: 20px 1fr;
    gap: 1px;
    background: var(--border);
}

.panel {
    background: var(--bg);
    position: relative;
    overflow: hidden;
}

.panel canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.panel-label {
    position: absolute;
    top: 3px;
    right: 5px;
    font-size: 8px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--dim);
    pointer-events: none;
    z-index: 2;
}

.axis-label {
    position: absolute;
    font-size: 8px;
    color: var(--cyan);
    pointer-events: none;
}

/* Controls strip */
#controls {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 26px;
    background: var(--surface);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 10px;
    gap: 10px;
    z-index: 100;
    font-size: 9px;
    color: var(--dim);
}

#controls button {
    background: transparent;
    color: var(--bright);
    border: 1px solid var(--dim);
    padding: 2px 10px;
    cursor: pointer;
    font: 9px var(--font);
    letter-spacing: 0.04em;
    transition: border-color 0.15s;
}
#controls button:hover { border-color: var(--accent); color: var(--accent); }

#controls select, #controls input {
    background: var(--bg);
    color: var(--bright);
    border: 1px solid var(--dim);
    font: 9px var(--font);
    padding: 1px 4px;
    outline: none;
}
#controls select:focus, #controls input:focus { border-color: var(--cyan); }

/* Map view */
#map-panel {
    display: none;
    position: absolute;
    top: 22px;
    left: 0;
    right: 0;
    bottom: 26px;
    z-index: 50;
}

body.view-map #app { display: none; }
body.view-map #map-panel { display: block; }