/* Kein backdrop-filter: bricht nach FiveM-Updates zu einem schwarzen Kasten auf. */

:root {
    --accent: #38bdf8;
    --accent-dim: rgba(56, 189, 248, 0.15);
    --warn: #fbbf24;
    --danger: #f87171;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --panel: rgba(9, 18, 28, 0.72);
    --ring: 327; /* 2 * PI * 52, Umfang des Gauge-Kreises */
}

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

body {
    overflow: hidden;
    background: transparent;
    font-family: 'Segoe UI', 'Roboto', system-ui, sans-serif;
    user-select: none;
}

/* Grid statt Flex: so sitzen Tiefe, Ring und Druck garantiert auf einer
   gemeinsamen Mittelachse, und die Lampen-Leiste hängt in einer zweiten Zeile
   mittig unter dem Ring - ohne Ausgleichs-Margins. */
#hud {
    position: absolute;
    left: 50%;
    bottom: 7vh;
    transform: translateX(-50%) translateY(0);
    display: grid;
    grid-template-columns: auto auto auto;
    grid-template-rows: auto auto;
    align-items: center;
    justify-items: center;
    column-gap: 22px;
    row-gap: 8px;
    padding: 14px 22px;
    border-radius: 16px;
    background: var(--panel);
    border: 1px solid rgba(148, 163, 184, 0.18);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
    color: var(--text);
    transition: opacity 220ms ease, transform 220ms ease;
}

#hud.hidden {
    opacity: 0;
    transform: translateX(-50%) translateY(14px);
    pointer-events: none;
}

/* --- Luft-Gauge --- */

.gauge {
    position: relative;
    width: 92px;
    height: 92px;
    grid-column: 2;
    grid-row: 1;
}

.gauge svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.gauge circle {
    fill: none;
    stroke-width: 8;
    stroke-linecap: round;
}

.gauge-track {
    stroke: rgba(148, 163, 184, 0.16);
}

.gauge-fill {
    stroke: var(--accent);
    stroke-dasharray: var(--ring);
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 260ms linear, stroke 260ms ease;
}

.gauge-inner {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
}

#air-value {
    font-size: 21px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.5px;
    line-height: 1;
}

.caption {
    font-size: 9px;
    font-weight: 600;
    letter-spacing: 1.4px;
    color: var(--muted);
    text-transform: uppercase;
}

/* --- Tiefe + Lampe --- */

.readout {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 84px;
    grid-row: 1;
}

/* Tiefe spiegelt den Druck: Werte zeigen jeweils zum Ring hin. */
.readout--right {
    align-items: flex-end;
    grid-column: 1;
    justify-self: end;
}

.readout--right .value {
    justify-content: flex-end;
}

#pressure {
    grid-column: 3;
    justify-self: start;
}

.value {
    display: flex;
    align-items: baseline;
    gap: 3px;
    font-size: 26px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    line-height: 1;
    transition: color 260ms ease;
}

.unit {
    font-size: 13px;
    font-weight: 500;
    color: var(--muted);
}

.lamp {
    grid-column: 2;
    grid-row: 2;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 9px;
    border-radius: 8px;
    background: rgba(148, 163, 184, 0.1);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--muted);
    transition: background 200ms ease, color 200ms ease;
}

.lamp svg {
    width: 13px;
    height: 13px;
    fill: currentColor;
}

.lamp.hidden {
    display: none;
}

.lamp.on {
    background: var(--accent-dim);
    color: var(--accent);
}

/* --- Warnzustaende --- */

#hud.warn .gauge-fill { stroke: var(--warn); }
#hud.warn #air-value { color: var(--warn); }

#hud.danger .gauge-fill { stroke: var(--danger); }
#hud.danger #air-value { color: var(--danger); }
#hud.danger .gauge { animation: pulse 1s ease-in-out infinite; }

#hud.deep #depth-value { color: var(--warn); }

/* Tiefengrenze des Atemgases überschritten - Tiefenrausch läuft. */
#hud.overlimit #depth-value {
    color: var(--danger);
    animation: pulse 1s ease-in-out infinite;
}

/* Reservedruck: in der Tauchpraxis die Schwelle zum Aufstieg. */
#pressure.reserve .value { color: var(--danger); }

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.45; }
}