.fp-spacetech-astronaut-heart-rate-monitor-ui {
    --fp-container-width: 100%;
    --fp-max-width: 500px;
    --fp-aspect-ratio: 1 / 1;

    --fp-primary-color: #ffffff; 
    --fp-secondary-color: #f4f9fd; 
    --fp-muted-color: #7b93a4; 
    --fp-soft-color: #d0e1f9; 
    --fp-background-color: transparent;

    --fp-info-color: #4facfe; 
    --fp-warning-color: #00f2fe; 
    --fp-danger-color: #0a192f; 
    --fp-accent-color: #80d8ff; 
    --fp-text-color: #0a192f; 

    width: var(--fp-container-width);
    max-width: var(--fp-max-width);
    margin: 0 auto;
    background: var(--fp-background-color);
    font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
    box-sizing: border-box;
    position: relative;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui * {
    box-sizing: inherit;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-stage {
    aspect-ratio: var(--fp-aspect-ratio);
    background: var(--fp-primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    border: 2px solid var(--fp-danger-color);
    border-radius: 8px;
    box-shadow: 
        0 20px 40px -10px rgba(10, 25, 47, 0.1),
        inset 0 0 0 4px var(--fp-primary-color),
        inset 0 0 0 5px var(--fp-soft-color);
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-grid {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-size: 30px 30px;
    background-image: 
        linear-gradient(to right, rgba(208, 225, 249, 0.4) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(208, 225, 249, 0.4) 1px, transparent 1px);
    z-index: 0;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-grid::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: radial-gradient(circle at 1px 1px, var(--fp-danger-color) 1px, transparent 1px);
    background-size: 120px 120px;
    background-position: -1px -1px;
    opacity: 0.3;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-ambient {
    position: absolute;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle at center, rgba(128, 216, 255, 0.15) 0%, transparent 60%);
    animation: fp-spacetech-astronaut-heart-rate-monitor-ui-breathe 4s ease-in-out infinite alternate;
    z-index: 1;
    pointer-events: none;
}

@keyframes fp-spacetech-astronaut-heart-rate-monitor-ui-breathe {
    0% { transform: scale(0.9); opacity: 0.5; }
    100% { transform: scale(1.1); opacity: 1; }
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-radar-wrap {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 320px; height: 320px;
    z-index: 2;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-radar-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid var(--fp-soft-color);
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-radar-ring-1 {
    width: 100%; height: 100%;
    border-style: dashed;
    animation: fp-spacetech-astronaut-heart-rate-monitor-ui-spin 30s linear infinite;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-radar-ring-2 {
    width: 60%; height: 60%;
    border: 2px dotted var(--fp-info-color);
    opacity: 0.5;
    animation: fp-spacetech-astronaut-heart-rate-monitor-ui-spin-rev 20s linear infinite;
}

@keyframes fp-spacetech-astronaut-heart-rate-monitor-ui-spin {
    100% { transform: rotate(360deg); }
}
@keyframes fp-spacetech-astronaut-heart-rate-monitor-ui-spin-rev {
    100% { transform: rotate(-360deg); }
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-card {
    position: relative;
    z-index: 10;
    width: 85%;
    height: 85%;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border: 1px solid var(--fp-danger-color);
    display: flex;
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(10, 25, 47, 0.05);
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-bracket {
    position: absolute;
    width: 16px; height: 16px;
    border: 2px solid var(--fp-danger-color);
    z-index: 15;
}
.fp-spacetech-astronaut-heart-rate-monitor-ui-bracket-tl { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.fp-spacetech-astronaut-heart-rate-monitor-ui-bracket-tr { top: -1px; right: -1px; border-left: none; border-bottom: none; }
.fp-spacetech-astronaut-heart-rate-monitor-ui-bracket-bl { bottom: -1px; left: -1px; border-right: none; border-top: none; }
.fp-spacetech-astronaut-heart-rate-monitor-ui-bracket-br { bottom: -1px; right: -1px; border-left: none; border-top: none; }

.fp-spacetech-astronaut-heart-rate-monitor-ui-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px dashed var(--fp-soft-color);
    padding-bottom: 12px;
    margin-bottom: 16px;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-crew-id {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--fp-text-color);
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    gap: 6px;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-crew-id::before {
    content: '';
    display: inline-block;
    width: 8px; height: 8px;
    background: var(--fp-accent-color);
    border-radius: 50%;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-status {
    font-size: 0.65rem;
    font-weight: 800;
    color: var(--fp-primary-color);
    background: var(--fp-danger-color);
    padding: 2px 6px;
    letter-spacing: 0.15em;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-vitals {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-bpm-box {
    display: flex;
    flex-direction: column;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-bpm-label {
    font-size: 0.6rem;
    color: var(--fp-muted-color);
    letter-spacing: 0.1em;
    margin-bottom: -4px;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-bpm-value-wrap {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-bpm-value {
    font-size: 4rem;
    font-weight: 400; 
    color: var(--fp-danger-color);
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-bpm-unit {
    font-size: 0.8rem;
    color: var(--fp-muted-color);
    font-weight: 600;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-heart-icon {
    width: 48px;
    height: 48px;
    color: var(--fp-accent-color);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transform-origin: center;
    transition: transform 0.1s ease-out;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-heart-icon svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 6px rgba(128, 216, 255, 0.6));
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-wave-container {
    flex: 1;
    position: relative;
    background: var(--fp-secondary-color);
    border: 1px solid var(--fp-soft-color);
    margin-bottom: 20px;
    overflow: hidden;
    display: flex;
    align-items: center;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-wave-grid {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-size: 10px 10px;
    background-image: 
        linear-gradient(to right, rgba(208, 225, 249, 0.3) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(208, 225, 249, 0.3) 1px, transparent 1px);
    z-index: 1;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-wave-container::after {
    content: '';
    position: absolute;
    top: 50%; left: 0; right: 0;
    height: 1px;
    background: rgba(10, 25, 47, 0.2);
    z-index: 2;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-wave-svg {
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 5;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-sine-path-bg {
    fill: none;
    stroke: var(--fp-info-color);
    stroke-width: 1;
    opacity: 0.3;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-sine-path {
    fill: none;
    stroke: var(--fp-accent-color);
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    filter: drop-shadow(0 0 4px rgba(128, 216, 255, 0.8));
    transition: stroke-width 0.1s, filter 0.1s;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-stat {
    border: 1px solid var(--fp-soft-color);
    padding: 8px 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--fp-primary-color);
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-stat span {
    font-size: 0.6rem;
    color: var(--fp-muted-color);
    letter-spacing: 0.05em;
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-stat strong {
    font-size: 0.9rem;
    color: var(--fp-danger-color);
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-stage.is-beating .fp-spacetech-astronaut-heart-rate-monitor-ui-heart-icon {
    transform: scale(1.2);
    color: var(--fp-danger-color);
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-stage.is-beating .fp-spacetech-astronaut-heart-rate-monitor-ui-sine-path {
    stroke: var(--fp-danger-color);
    stroke-width: 3;
    filter: drop-shadow(0 0 8px rgba(10, 25, 47, 0.5));
}

.fp-spacetech-astronaut-heart-rate-monitor-ui-stage.is-beating .fp-spacetech-astronaut-heart-rate-monitor-ui-status {
    background: var(--fp-accent-color);
    color: var(--fp-danger-color);
}

@media (max-width: 480px) {
    .fp-spacetech-astronaut-heart-rate-monitor-ui-card { width: 90%; height: 90%; padding: 16px; }
    .fp-spacetech-astronaut-heart-rate-monitor-ui-bpm-value { font-size: 3rem; }
    .fp-spacetech-astronaut-heart-rate-monitor-ui-heart-icon { width: 36px; height: 36px; }
    .fp-spacetech-astronaut-heart-rate-monitor-ui-wave-container { margin-bottom: 16px; }
}

(function() {
    document.querySelectorAll('.fp-spacetech-astronaut-heart-rate-monitor-ui').forEach(root => {
        const stage = root.querySelector('#fp-spacetech-astronaut-heart-rate-monitor-ui-stage');
        const bpmEl = root.querySelector('#fp-spacetech-astronaut-heart-rate-monitor-ui-bpm-val');
        const pathFg = root.querySelector('#fp-spacetech-astronaut-heart-rate-monitor-ui-sine');
        const pathBg = root.querySelector('#fp-spacetech-astronaut-heart-rate-monitor-ui-sine-bg');

        if (!stage || !bpmEl || !pathFg) return;

        let animationFrameId;
        let lastTick = 0;
        
        let phase1 = 0;
        let phase2 = 0;
        let currentAmp = 4;
        let targetAmp = 4;
        
        let currentBpm = 72;
        let nextBeatTime = 0;

        function generateSinePath(width, height, amplitude, frequency, phaseOffset) {
            const centerY = height / 2;
            let d = `M 0 ${centerY + Math.sin(phaseOffset) * amplitude}`;
            for (let x = 5; x <= width; x += 5) {
                let y = centerY + Math.sin((x * frequency) + phaseOffset) * amplitude;
                d += ` L ${x} ${y}`;
            }
            return d;
        }

        function fp_spacetech_astronaut_heart_rate_monitor_ui_loop(timestamp) {
            if (!document.body.contains(root)) {
                cancelAnimationFrame(animationFrameId);
                if (typeof observer !== 'undefined') observer.disconnect();
                document.removeEventListener('visibilitychange', fp_spacetech_astronaut_heart_rate_monitor_ui_handleVisibilityChange);
                return;
            }

            if (document.visibilityState === 'visible') {
                if (!lastTick) lastTick = timestamp;
                const delta = timestamp - lastTick;
                lastTick = timestamp;

                phase1 -= delta * 0.006;
                phase2 -= delta * 0.003;

                if (timestamp > nextBeatTime) {
                    targetAmp = 35; 
                    stage.classList.add('is-beating');
                    
                    setTimeout(() => {
                        if(document.body.contains(root)) stage.classList.remove('is-beating');
                    }, 150);

                    currentBpm = 68 + Math.random() * 8;
                    if (bpmEl) bpmEl.textContent = Math.round(currentBpm);

                    let interval = (60000 / currentBpm);
                    nextBeatTime = timestamp + interval;
                }

                targetAmp = Math.max(4, targetAmp - delta * 0.1);
                currentAmp += (targetAmp - currentAmp) * 0.2;

                const W = 300;
                const H = 80;
                
                if (pathFg) pathFg.setAttribute('d', generateSinePath(W, H, currentAmp, 0.04, phase1));
                if (pathBg) pathBg.setAttribute('d', generateSinePath(W, H, 8, 0.02, phase2));
            }

            animationFrameId = requestAnimationFrame(fp_spacetech_astronaut_heart_rate_monitor_ui_loop);
        }

        function fp_spacetech_astronaut_heart_rate_monitor_ui_handleVisibilityChange() {
            if (document.visibilityState === 'hidden') {
                if (animationFrameId) {
                    cancelAnimationFrame(animationFrameId);
                    animationFrameId = null;
                    lastTick = 0;
                }
            } else {
                if (!animationFrameId) {
                    lastTick = performance.now();
                    nextBeatTime = performance.now(); 
                    animationFrameId = requestAnimationFrame(fp_spacetech_astronaut_heart_rate_monitor_ui_loop);
                }
            }
        }

        document.addEventListener('visibilitychange', fp_spacetech_astronaut_heart_rate_monitor_ui_handleVisibilityChange);

        const observer = new IntersectionObserver((entries) => {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    if (!animationFrameId && document.visibilityState === 'visible') {
                        lastTick = performance.now();
                        nextBeatTime = performance.now();
                        animationFrameId = requestAnimationFrame(fp_spacetech_astronaut_heart_rate_monitor_ui_loop);
                    }
                } else {
                    if (animationFrameId) {
                        cancelAnimationFrame(animationFrameId);
                        animationFrameId = null;
                    }
                }
            });
        }, { threshold: 0.1 });

        observer.observe(root);
    });
})();