/* BT Locate Mode Styles */

/* Environment preset grid */
.btl-env-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 6px;
}

.btl-env-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 8px 4px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
}

.btl-env-btn:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.2);
}

.btl-env-btn.active {
    background: rgba(0, 255, 136, 0.1);
    border-color: var(--accent-green, #00ff88);
    color: var(--text-primary);
}

.btl-env-icon {
    font-size: 18px;
    line-height: 1;
}

.btl-env-label {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
}

.btl-env-n {
    font-size: 9px;
    font-family: var(--font-mono);
    color: var(--text-dim);
}

/* ============================================
   PROXIMITY HUD — main visuals area
   ============================================ */

.btl-hud {
    display: flex;
    flex-direction: column;
    gap: 0;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    flex-shrink: 0;
    overflow: hidden;
}

.btl-hud-top {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 14px 20px;
}

.btl-hud-band {
    font-size: 22px;
    font-weight: 800;
    font-family: var(--font-mono);
    letter-spacing: 2px;
    padding: 14px 20px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid rgba(255, 255, 255, 0.1);
    color: var(--text-dim);
    text-align: center;
    min-width: 130px;
    transition: all 0.3s;
    flex-shrink: 0;
}

.btl-hud-band.immediate {
    color: #ef4444;
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.15);
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.2);
    animation: btl-pulse 1s ease-in-out infinite;
}

.btl-hud-band.near {
    color: #f97316;
    border-color: #f97316;
    background: rgba(249, 115, 22, 0.12);
    box-shadow: 0 0 15px rgba(249, 115, 22, 0.15);
    animation: btl-pulse 2s ease-in-out infinite;
}

.btl-hud-band.far {
    color: #eab308;
    border-color: #eab308;
    background: rgba(234, 179, 8, 0.1);
    box-shadow: 0 0 10px rgba(234, 179, 8, 0.1);
}

@keyframes btl-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.btl-hud-metrics {
    display: flex;
    gap: 20px;
    flex: 1;
    align-items: flex-start;
}

.btl-hud-separator {
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.08);
    align-self: center;
    flex-shrink: 0;
}

.btl-hud-metric {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 60px;
}

.btl-hud-metric-lg .btl-hud-value {
    font-size: 28px;
}

.btl-hud-value {
    font-size: 22px;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-primary);
    line-height: 1.1;
}

.btl-hud-unit {
    font-size: 10px;
    color: var(--text-dim);
    font-family: var(--font-mono);
}

.btl-hud-label {
    font-size: 9px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 2px;
}

.btl-hud-controls {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-shrink: 0;
}

.btl-hud-export-row {
    display: flex;
    gap: 5px;
    align-items: center;
}

.btl-hud-export-format {
    min-width: 62px;
    padding: 3px 6px;
    font-size: 10px;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
}

.btl-hud-audio-toggle {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
}

.btl-hud-audio-toggle input[type="checkbox"] {
    margin: 0;
}

.btl-hud-clear-btn {
    padding: 4px 10px;
    font-size: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    color: var(--text-dim);
    cursor: pointer;
    transition: all 0.2s;
}

.btl-hud-clear-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
}

/* Bottom info bar */
.btl-hud-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 20px;
    background: rgba(0, 0, 0, 0.3);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.btl-hud-info {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.btl-hud-info-item {
    font-size: 10px;
    font-family: var(--font-mono);
    color: var(--text-dim);
}

.btl-hud-info-sep {
    color: rgba(255, 255, 255, 0.15);
    font-size: 10px;
}

.btl-hud-diag {
    display: none;
    font-size: 9px;
    color: var(--text-dim);
    font-family: var(--font-mono);
    opacity: 0.5;
    white-space: nowrap;
}

.btl-hud-diag:not(:empty) {
    display: block;
}

/* ============================================
   VISUALS AREA — map + chart
   ============================================ */

.btl-visuals-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
    min-height: 0;
    overflow: hidden;
    padding: 8px;
}

.btl-map-container {
    flex: 1;
    min-height: 250px;
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

#btLocateMap {
    position: absolute;
    inset: 0;
    background: #1a1a2e;
}

.btl-map-overlay-controls {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 450;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 7px 8px;
    border-radius: 7px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(4px);
}

.btl-map-overlay-toggle {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 10px;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    cursor: pointer;
    white-space: nowrap;
}

.btl-map-overlay-toggle input[type="checkbox"] {
    margin: 0;
}

.btl-map-overlay-toggle input[type="checkbox"]:disabled + span {
    opacity: 0.45;
}

.btl-map-heat-legend {
    position: absolute;
    left: 10px;
    bottom: 10px;
    z-index: 430;
    min-width: 120px;
    padding: 6px 8px;
    border-radius: 7px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.14);
    backdrop-filter: blur(4px);
}

.btl-map-heat-label {
    display: block;
    font-size: 9px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.7px;
    margin-bottom: 4px;
}

.btl-map-heat-bar {
    height: 7px;
    border-radius: 4px;
    background: linear-gradient(90deg, #2563eb 0%, #16a34a 40%, #f59e0b 70%, #ef4444 100%);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.btl-map-heat-scale {
    display: flex;
    justify-content: space-between;
    margin-top: 3px;
    font-size: 8px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btl-map-track-stats {
    position: absolute;
    right: 10px;
    bottom: 10px;
    z-index: 430;
    padding: 5px 8px;
    border-radius: 7px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: var(--text-secondary);
    font-size: 10px;
    font-family: var(--font-mono);
    backdrop-filter: blur(4px);
}

.btl-rssi-chart-container {
    height: 100px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 8px;
    position: relative;
    flex-shrink: 0;
}

.btl-rssi-chart-container .btl-chart-label {
    position: absolute;
    top: 4px;
    left: 8px;
    font-size: 9px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
}

#btLocateRssiChart {
    width: 100%;
    height: 100%;
}

/* ============================================
   LOCATE BUTTON — Bluetooth device cards
   ============================================ */

.bt-locate-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--accent-green, #00ff88);
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid rgba(0, 255, 136, 0.3);
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.2s;
}

.bt-locate-btn:hover {
    background: rgba(0, 255, 136, 0.2);
    border-color: var(--accent-green, #00ff88);
}

.bt-locate-btn svg {
    width: 10px;
    height: 10px;
}

/* ============================================
   IRK DETECT BUTTON + DEVICE PICKER
   ============================================ */

.btl-detect-irk-btn {
    padding: 5px 10px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--accent-cyan, #00d4ff);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    flex-shrink: 0;
}

.btl-detect-irk-btn:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--accent-cyan, #00d4ff);
}

.btl-detect-irk-btn:disabled {
    opacity: 0.5;
    cursor: wait;
}

.btl-irk-picker {
    margin-top: 6px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    overflow: hidden;
}

.btl-irk-picker-status {
    padding: 8px 10px;
    font-size: 10px;
    color: var(--text-dim);
    text-align: center;
}

.btl-irk-picker-list {
    max-height: 160px;
    overflow-y: auto;
}

.btl-irk-picker-item {
    padding: 7px 10px;
    cursor: pointer;
    transition: background 0.15s;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.btl-irk-picker-item:first-child {
    border-top: none;
}

.btl-irk-picker-item:hover {
    background: rgba(0, 255, 136, 0.08);
}

.btl-irk-picker-name {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-primary);
}

.btl-irk-picker-meta {
    font-size: 9px;
    font-family: var(--font-mono);
    color: var(--text-dim);
    margin-top: 1px;
}

/* ============================================
   RESPONSIVE — stack HUD vertically on narrow
   ============================================ */

@media (max-width: 900px) {
    .btl-hud {
        flex-wrap: wrap;
        gap: 10px;
    }

    .btl-hud-band {
        min-width: unset;
        width: 100%;
        font-size: 20px;
    }

    .btl-hud-metrics {
        width: 100%;
        justify-content: space-around;
    }

    .btl-hud-controls {
        flex-direction: row;
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }

    .btl-hud-export-row {
        width: 100%;
        justify-content: center;
    }

    .btl-map-overlay-controls {
        top: 8px;
        right: 8px;
        gap: 3px;
        padding: 6px 7px;
    }

    .btl-map-heat-legend {
        left: 8px;
        bottom: 8px;
    }

    .btl-map-track-stats {
        right: 8px;
        bottom: 8px;
        font-size: 9px;
    }
}

/* ── Crosshair sweep animation ───────────────────────────────────── */
.btl-crosshair-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 1200;
    --btl-crosshair-x-start: 100%;
    --btl-crosshair-y-start: 100%;
    --btl-crosshair-x-end: 50%;
    --btl-crosshair-y-end: 50%;
    --btl-crosshair-duration: 1500ms;
}

.btl-crosshair-line {
    position: absolute;
    opacity: 0;
    background: var(--accent-cyan);
    will-change: transform, opacity;
}

.btl-crosshair-vertical {
    top: 0;
    bottom: 0;
    width: 1px;
    left: 0;
    transform: translateX(var(--btl-crosshair-x-start));
}

.btl-crosshair-horizontal {
    left: 0;
    right: 0;
    height: 1px;
    top: 0;
    transform: translateY(var(--btl-crosshair-y-start));
}

.btl-crosshair-overlay.active .btl-crosshair-vertical {
    animation: btlCrosshairSweepX var(--btl-crosshair-duration) cubic-bezier(0.2, 0.85, 0.28, 1) forwards;
}

.btl-crosshair-overlay.active .btl-crosshair-horizontal {
    animation: btlCrosshairSweepY var(--btl-crosshair-duration) cubic-bezier(0.2, 0.85, 0.28, 1) forwards;
}

@keyframes btlCrosshairSweepX {
    0%   { transform: translateX(var(--btl-crosshair-x-start)); opacity: 0; }
    12%  { opacity: 1; }
    85%  { opacity: 1; }
    100% { transform: translateX(var(--btl-crosshair-x-end));   opacity: 0; }
}

@keyframes btlCrosshairSweepY {
    0%   { transform: translateY(var(--btl-crosshair-y-start)); opacity: 0; }
    12%  { opacity: 1; }
    85%  { opacity: 1; }
    100% { transform: translateY(var(--btl-crosshair-y-end));   opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
    .btl-crosshair-overlay.active .btl-crosshair-vertical,
    .btl-crosshair-overlay.active .btl-crosshair-horizontal {
        animation-duration: 220ms;
    }
}