/* Product Section Styles */
.product-section {
    --timeline-step-gap: 100px; /* Equidistant gap: Stage 1→2 (scroll-container), 2→3, 3→4 */
    position: relative;
    z-index: 2;
    min-height: 100vh;
    padding: 100px 20px 80px;
    margin-top: 40px;
    background: #006d8f;
    color: #fffcf7;
    /* Remove overflow: visible - can interfere with sticky positioning */
}

.product-timeline {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    /* Ensure no overflow that would break sticky */
    position: relative;
}

/* Gradient circles throughout product (match Rebo hero style) */
.product-geo-circle {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    opacity: 0;
    animation: productGeoFadeIn 1.2s ease-out forwards;
}

.product-timeline .rebo-hero-header,
.product-timeline .hero.rebo-hero,
.product-timeline .timeline-header,
.product-timeline .scroll-container,
.product-timeline .timeline-container {
    position: relative;
    z-index: 1;
}

.product-geo-1 {
    width: 320px;
    height: 320px;
    top: 12%;
    right: -80px;
    background: linear-gradient(135deg, rgba(0, 109, 143, 0.15) 0%, rgba(0, 136, 204, 0.08) 100%);
    animation-delay: 0.3s;
}

.product-geo-2 {
    width: 200px;
    height: 200px;
    top: 45%;
    left: -60px;
    background: linear-gradient(135deg, rgba(175, 200, 160, 0.2) 0%, rgba(143, 184, 122, 0.1) 100%);
    animation-delay: 0.5s;
}

.product-geo-3 {
    width: 120px;
    height: 120px;
    top: 70%;
    right: 10%;
    border: 1px solid rgba(175, 200, 160, 0.35);
    background: transparent;
    animation-delay: 0.7s;
}

.product-geo-4 {
    width: 180px;
    height: 180px;
    bottom: 15%;
    left: 5%;
    background: linear-gradient(135deg, rgba(0, 109, 143, 0.12) 0%, rgba(0, 136, 204, 0.06) 100%);
    animation-delay: 0.9s;
}

/* Subtle gradient circles throughout explainer section (lower opacity, softer) */
.product-geo-explainer {
    opacity: 0;
    animation: productGeoFadeIn 1.5s ease-out forwards;
}

.product-geo-5 {
    width: 140px;
    height: 140px;
    top: 38%;
    right: 5%;
    background: linear-gradient(135deg, rgba(0, 109, 143, 0.06) 0%, rgba(0, 136, 204, 0.03) 100%);
    animation-delay: 1s;
}

.product-geo-6 {
    width: 100px;
    height: 100px;
    top: 52%;
    left: -20px;
    background: linear-gradient(135deg, rgba(175, 200, 160, 0.08) 0%, rgba(143, 184, 122, 0.04) 100%);
    animation-delay: 1.2s;
}

.product-geo-7 {
    width: 180px;
    height: 180px;
    top: 68%;
    right: -40px;
    background: linear-gradient(135deg, rgba(0, 109, 143, 0.05) 0%, rgba(0, 136, 204, 0.02) 100%);
    animation-delay: 1.4s;
}

.product-geo-8 {
    width: 80px;
    height: 80px;
    top: 78%;
    left: 15%;
    border: 1px solid rgba(175, 200, 160, 0.2);
    background: transparent;
    animation-delay: 1.6s;
}

.product-geo-9 {
    width: 120px;
    height: 120px;
    top: 88%;
    right: 20%;
    background: linear-gradient(135deg, rgba(175, 200, 160, 0.06) 0%, rgba(143, 184, 122, 0.03) 100%);
    animation-delay: 1.8s;
}

.product-geo-10 {
    width: 160px;
    height: 160px;
    bottom: 8%;
    left: -30px;
    background: linear-gradient(135deg, rgba(0, 109, 143, 0.05) 0%, rgba(0, 136, 204, 0.02) 100%);
    animation-delay: 2s;
}

@keyframes productGeoFadeIn {
    from {
        opacity: 0;
        transform: scale(0.85);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.timeline-header {
    margin-top: 2rem;
    margin-bottom: 18px;
    text-align: left;
}

.timeline-label {
    display: inline-block;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: rgba(255, 252, 247, 0.7);
    margin-bottom: 1rem;
}

.timeline-title {
    font-size: 3.5rem;
    font-weight: 300;
    color: #fffcf7;
    margin: 0 0 1.5rem 0;
    line-height: 1.2;
}

.timeline-intro {
    font-size: 1.2rem;
    color: rgba(255, 252, 247, 0.9);
    line-height: 1.7;
    margin: 0;
    max-width: 700px;
}

/* Scroll Container for Stage 1 (Sticky) */
/* FORCE OVERRIDE - Maximum specificity to beat any cache or other CSS */
body .product-section .product-timeline .scroll-container,
body .product-section .scroll-container,
.product-section .product-timeline .scroll-container,
.product-section .scroll-container,
.scroll-container {
    position: relative !important;
    /* Reduced height - half of previous */
    /* Formula: sticky duration = container height - sticky element height */
    /* With 200vh container and 100vh sticky: 200vh - 100vh = 100vh of sticky scroll */
    height: 200vh !important; /* Shorter sticky interaction time */
    min-height: 200vh !important; /* Ensure minimum height */
    max-height: none !important; /* Remove any max-height restrictions */
    margin-top: 0 !important; /* Align top with stage1 and timeline-step bodies */
    margin-bottom: var(--timeline-step-gap) !important; /* Stage 1→2: same as 2→3, 3→4 */
    width: 100% !important;
    /* CRITICAL: No overflow property - sticky requires default overflow behavior */
    /* No transform, filter, or perspective on this or parent elements */
}

.scroll-container .sticky-wrapper,
.sticky-wrapper {
    position: -webkit-sticky !important;
    position: sticky !important;
    top: 60px !important; /* Lower sticky wrapper by 60px from viewport top */
    height: 100vh !important;
    max-height: 100vh !important; /* Prevent content from exceeding viewport */
    width: 100% !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    z-index: 10 !important;
    margin: 0 !important;
    padding: 0 !important; /* Top and bottom padding removed for tighter sticky area */
    box-sizing: border-box !important; /* Include padding in height calculation */
    /* CRITICAL: No overflow property on sticky element - let parent containers handle it */
    /* CRITICAL: No transform, filter, perspective, or will-change - breaks sticky */
    /* No transition - can interfere with sticky positioning */
}

/* Desktop: let sticky wrapper grow so Stage 1 EMG box (1000px) can display at full height */
@media (min-width: 769px) {
    .scroll-container .sticky-wrapper,
    .sticky-wrapper {
        height: auto !important;
        min-height: 100vh !important;
        max-height: none !important;
    }
}

/* Stage 1 Container - matches timeline-container structure */
/* Timeline line centered for mobile-friendly design */
.sticky-wrapper .stage1-container {
    position: relative;
    padding-left: 0 !important; /* No left padding - timeline centered */
    padding-right: 0 !important;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto 0 auto;
    flex: 0 0 auto; /* Prevent flex shrinking */
}

.stage1-container .timeline-steps {
    position: relative;
    width: 100%;
}

/* Above image and description in stage 1 */
.stage1-step-scroll-prompt {
    text-align: center;
    font-size: 0.875rem;
    font-weight: 600;
    color: #006d8f;
    margin: 0 0 20px 0;
    padding: 6px 14px;
    background: #fffcf7;
    border: 2px solid rgba(175, 200, 160, 0.5);
    border-radius: 8px;
    white-space: nowrap;
    z-index: 2;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.stage1-line {
    display: none !important; /* Timeline line removed */
}

/* Stage 1 Step - matches timeline-step structure */
/* CRITICAL: No transform or transition on sticky elements - breaks sticky positioning */
.stage1-step {
    position: relative;
    margin-bottom: 0;
    margin-top: 0; /* Align top with scroll-container and timeline-step bodies */
    padding: 20px 20px 8px 20px;
    padding-top: 0; /* Reduced by 10px from 8px - border closer to content at top */
    opacity: 1 !important; /* Override timeline-step default opacity: 0 */
    border: 2px solid rgba(255, 252, 247, 0.4);
    border-radius: 12px;
    box-sizing: border-box;
    /* NO transform - transforms break sticky positioning */
    /* NO transition - transitions can interfere with sticky */
}

.stage1-step.visible {
    opacity: 1 !important;
    /* NO transform - keep it static for sticky to work */
}

/* EMG Canvas for Stage 1 - fits within step-image structure */
/* Stage 1 specific overrides - same alignment as Stages 2-4 (center, no negative margin) */
/* Canvas/Image on LEFT (400px), Title & Description on RIGHT (1fr) */
.stage1-step .step-content-wrapper {
    display: grid !important;
    grid-template-columns: 400px 1fr !important; /* Image on left, content on right - same as Stages 2-4 */
    gap: 40px !important;
    align-items: center !important; /* Same as other stages: text vertically centered with graphic */
    padding: 0 20px !important; /* Add horizontal padding since container has no left padding */
    margin-top: 0 !important; /* Same as other stages - no pull-up */
}

.stage1-step .step-image {
    width: 100%;
    height: 1000px; /* desktop only */
    background: transparent !important; /* Override default step-image background */
    border: none !important; /* Override default step-image border */
    border-radius: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
    position: relative;
    padding: 0;
    box-shadow: none !important; /* Remove any default box-shadow */
}

.stage1-step .step-content {
    flex: 1;
    position: relative; /* Allow marker positioning relative to content */
    padding-top: 10px; /* Same as other stages - space for marker above title */
}

.emg-canvas-wrapper {
    width: 100%;
    height: 100%;
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background: #fffcf7; /* beige/white for consistency */
    border: 2px solid rgba(175, 200, 160, 0.3);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

#stage1-canvas {
    width: 100%;
    height: 100%;
}

.interaction-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 109, 143, 0.95);
    padding: 2rem 3rem;
    border-radius: 12px;
    border: 2px solid #afc8a0;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: #fffcf7;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.interaction-overlay.fade {
    opacity: 0;
}

.status-indicator {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 109, 143, 0.95);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border: 2px solid #afc8a0;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    font-weight: 600;
    color: #fffcf7;
    transition: all 0.3s ease;
    z-index: 10;
}

.status-indicator.scrolling-up {
    color: #afc8a0;
    border-color: #afc8a0;
}

.status-indicator.scrolling-down {
    color: #afc8a0;
    border-color: #afc8a0;
}

.status-indicator.tapping {
    color: #afc8a0;
    border-color: #afc8a0;
}

/* Stage 4: same style/orientation as Stage 1 status-indicator (bottom center) */
.stage4-tap-indicator {
    position: absolute;
    bottom: -14px; /* overlap bottom border of box (straddle edge) */
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 109, 143, 0.95);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border: 2px solid #afc8a0;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    font-weight: 600;
    color: #fffcf7;
    transition: all 0.3s ease;
    z-index: 10;
    pointer-events: none;
    white-space: nowrap;
}

/* Stage 5: Physician & Patient App placeholder (same box style as other stages) */
/* ============================================
   APP MOCKUP - Stage 5 Phone Mockups
   ============================================ */

.app-mockup-container {
    display: flex;
    gap: 24px;
    justify-content: center;
    align-items: flex-start;
    width: 100%;
    padding: 20px 0;
}

.app-phone {
    position: relative;
    width: 160px;
    height: 320px;
    background: #1a1a1a;
    border-radius: 24px;
    padding: 8px;
    box-shadow:
        0 20px 40px rgba(0, 0, 0, 0.3),
        inset 0 0 0 2px #333;
    flex-shrink: 0;
}

.app-phone::before {
    /* Notch */
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 14px;
    background: #1a1a1a;
    border-radius: 0 0 10px 10px;
    z-index: 10;
}

.app-phone-screen {
    width: 100%;
    height: 100%;
    background: #fffcf7;
    border-radius: 18px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.app-phone-label {
    position: absolute;
    bottom: -28px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.7rem;
    font-weight: 600;
    color: rgba(255, 252, 247, 0.7);
    text-transform: uppercase;
    letter-spacing: 1px;
    white-space: nowrap;
}

/* Stage 5: Patient App & Physician App labels in teal so they’re easy to tell apart */
.timeline-step[data-step="5"] .app-phone-label {
    color: #006d8f;
}

/* App Header */
.app-header {
    background: #006d8f;
    padding: 20px 10px 10px;
    text-align: center;
}

.app-header-title {
    font-size: 0.65rem;
    font-weight: 700;
    color: #fffcf7;
    margin: 0;
    letter-spacing: 0.5px;
}

.app-header-subtitle {
    font-size: 0.5rem;
    color: rgba(255, 252, 247, 0.8);
    margin: 2px 0 0;
}

/* App Content */
.app-content {
    flex: 1;
    padding: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    overflow: hidden;
    margin-left: -5px;
}

/* Progress Ring (Patient App) */
.app-progress-ring {
    display: flex;
    justify-content: center;
    padding: 8px 0;
}

.progress-ring-wrapper {
    position: relative;
    width: 60px;
    height: 60px;
}

.progress-ring-bg {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 5px solid #e8e8e8;
}

.progress-ring-fill {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 5px solid transparent;
    border-top-color: #afc8a0;
    border-right-color: #afc8a0;
    border-bottom-color: #afc8a0;
    transform: rotate(-30deg);
}

.progress-ring-text {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.progress-ring-value {
    font-size: 0.8rem;
    font-weight: 700;
    color: #006d8f;
    line-height: 1;
}

.progress-ring-label {
    font-size: 0.4rem;
    color: #666;
    text-transform: uppercase;
}

/* App Stats Row */
.app-stats-row {
    display: flex;
    gap: 4px;
    justify-content: center;
    width: 100%;
    max-width: 100%;
}

.app-stat-box {
    flex: 1;
    min-width: 0;
    background: rgba(0, 109, 143, 0.08);
    border-radius: 6px;
    padding: 6px 4px;
    text-align: center;
}

.app-stat-value {
    font-size: 0.7rem;
    font-weight: 700;
    color: #006d8f;
    line-height: 1.2;
}

.app-stat-label {
    font-size: 0.4rem;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* App List Items */
.app-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.app-list-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 8px;
    background: rgba(175, 200, 160, 0.15);
    border-radius: 6px;
    border-left: 3px solid #afc8a0;
}

.app-list-icon {
    width: 16px;
    height: 16px;
    background: #afc8a0;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.app-list-icon svg {
    width: 10px;
    height: 10px;
    stroke: #006d8f;
}

.app-list-text {
    font-size: 0.5rem;
    color: #1a1a1a;
    line-height: 1.3;
}

.app-list-text strong {
    display: block;
    font-size: 0.55rem;
    color: #006d8f;
}

/* App Chart (Physician App) */
.app-chart {
    background: rgba(0, 109, 143, 0.05);
    border-radius: 6px;
    padding: 8px;
    height: 50px;
    position: relative;
    overflow: hidden;
}

.app-chart-title {
    font-size: 0.45rem;
    font-weight: 600;
    color: #006d8f;
    margin-bottom: 4px;
}

.app-chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 30px;
}

.app-chart-bar {
    flex: 1;
    background: linear-gradient(to top, #006d8f, #afc8a0);
    border-radius: 2px 2px 0 0;
    min-height: 4px;
}

/* Patient List (Physician App) */
.app-patient-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.app-patient-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 6px;
    background: #fff;
    border-radius: 6px;
    border: 1px solid #e8e8e8;
}

.app-patient-avatar {
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, #006d8f, #0088cc);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.app-patient-avatar span {
    font-size: 0.45rem;
    font-weight: 700;
    color: #fffcf7;
}

.app-patient-info {
    flex: 1;
    min-width: 0;
}

.app-patient-name {
    font-size: 0.5rem;
    font-weight: 600;
    color: #1a1a1a;
    line-height: 1.2;
}

.app-patient-status {
    font-size: 0.4rem;
    color: #666;
}

.app-patient-badge {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.app-patient-badge--good {
    background: #afc8a0;
}

.app-patient-badge--warning {
    background: #f39c12;
}

.app-patient-badge--new {
    background: #3498db;
}

/* App Button */
.app-button {
    background: #006d8f;
    color: #fffcf7;
    border: none;
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 0.5rem;
    font-weight: 600;
    text-align: center;
    margin-top: auto;
}

/* Responsive: Stack phones vertically on smaller screens */
@media (max-width: 768px) {
    .app-mockup-container {
        flex-direction: row;
        gap: 16px;
    }

    .app-phone {
        width: 140px;
        height: 280px;
    }

    .app-phone-label {
        font-size: 0.6rem;
    }
}

@media (max-width: 500px) {
    .app-mockup-container {
        gap: 12px;
    }

    .app-phone {
        width: 120px;
        height: 240px;
        border-radius: 18px;
        padding: 6px;
    }

    .app-phone::before {
        width: 40px;
        height: 10px;
    }

    .app-phone-screen {
        border-radius: 14px;
    }

    .app-header {
        padding: 16px 8px 8px;
    }

    .app-header-title {
        font-size: 0.55rem;
    }

    .progress-ring-wrapper {
        width: 48px;
        height: 48px;
    }

    .progress-ring-bg,
    .progress-ring-fill {
        border-width: 4px;
    }

    .progress-ring-value {
        font-size: 0.7rem;
    }
}

/* Legacy placeholder styles (fallback) */
.app-placeholder {
    width: 100%;
    height: 100%;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    box-sizing: border-box;
}

.app-placeholder-icon {
    font-size: 4rem;
    line-height: 1;
    opacity: 0.9;
}

.app-placeholder-text {
    font-size: 1rem;
    font-weight: 600;
    color: #006d8f;
    text-align: center;
    letter-spacing: 0.02em;
}

/* Timeline Container for Stages 2-4 */
/* Timeline line centered for mobile-friendly design */
.product-section > .product-timeline > .timeline-container,
.timeline-container {
    position: relative !important;
    padding-left: 0 !important; /* No left padding - timeline centered */
    padding-right: 0 !important;
    padding-top: 0 !important; /* Align top with scroll-container and stage1 bodies */
    padding-bottom: 0 !important;
}

.timeline-line {
    display: none !important; /* Timeline line removed */
}

.timeline-steps {
    position: relative;
}

.timeline-step {
    position: relative;
    margin-bottom: var(--timeline-step-gap); /* Equidistant with Stage 1→2 and between 2→3, 3→4 */
    margin-top: 60px; /* Reduced top margin since marker is now above title */
    padding: 100px 20px; /* Same horizontal padding (20px) as Stage 1; keep vertical 100px */
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
    /* Same border and dimensions as Stage 1 (stage1-step) */
    border: 2px solid rgba(255, 252, 247, 0.4);
    border-radius: 12px;
    box-sizing: border-box;
}

/* First timeline step (Stage 2) - no extra top margin so Stage 1→2 gap = --timeline-step-gap only */
.timeline-container > .timeline-steps > .timeline-step:first-child {
    margin-top: 0; /* Prevents 130px total (100+30); gap is scroll-container margin-bottom only */
    padding-top: 100px; /* Top padding 100px to match other steps */
    margin-bottom: var(--timeline-step-gap) !important;
}

/* Stage 3 - gap below = same as 2→3 */
.timeline-container > .timeline-steps > .timeline-step:nth-child(2) {
    margin-bottom: var(--timeline-step-gap) !important;
}

/* Ensure stage1-step doesn't inherit timeline-step defaults */
.timeline-step.stage1-step {
    opacity: 1;
    transform: translateY(0);
}

.timeline-step.visible {
    opacity: 1;
    transform: translateY(0);
}

.timeline-step:last-child {
    margin-bottom: 0;
}

/* Base marker styles - overridden by specific positioning above */
.step-marker {
    position: absolute;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 252, 247, 0.1);
    border: 2px solid rgba(175, 200, 160, 0.5);
    border-radius: 50%;
    z-index: 10;
    box-sizing: border-box;
    transition: all 0.3s ease;
    margin-top: 0;
}

.timeline-step .step-marker:hover,
.stage1-step .step-marker:hover {
    background: rgba(0, 109, 143, 1);
    border-color: rgba(255, 252, 247, 0.8);
    transform: scale(1.05);
}

.step-marker .step-number {
    font-size: 1.1rem;
    font-weight: 600;
    color: #afc8a0; /* Accent color for numbers */
    line-height: 1;
    text-align: center;
    width: 100%;
    display: block;
    margin: 0;
    padding: 0;
    letter-spacing: 0.5px;
}

/* Stages 2, 3, 4 - side by side layout */
/* Image on LEFT (400px), Title & Description on RIGHT (1fr) */
.step-content-wrapper {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 40px;
    align-items: center;
    padding: 0 20px; /* Add horizontal padding since container has no left padding */
    margin-top: 0; /* No top margin - marker is positioned relative to timeline-step */
    position: relative; /* Ensure proper stacking context - this allows marker to be positioned relative to it */
}

/* Position marker relative to step-content-wrapper to align with grid */
/* Since marker is a sibling, we use step-content-wrapper as positioning context */
.timeline-step,
.stage1-step {
    position: relative; /* Already set, but ensuring it's here */
}

/* Numbered circles on each step box – show and position at top-left of box */
.timeline-step .step-marker,
.stage1-step .step-marker {
    display: flex !important;
    top: -14px;
    left: 20px;
    width: 44px;
    height: 44px;
    background: rgba(0, 109, 143, 0.95);
    border: 2px solid rgba(255, 252, 247, 0.5);
    border-radius: 50%;
    align-items: center;
    justify-content: center;
}

.timeline-step .step-marker .step-number,
.stage1-step .step-marker .step-number {
    font-size: 1rem;
    font-weight: 700;
    color: #fffcf7;
}

.step-image {
    width: 100%;
    height: 300px;
    background: #fffcf7; /* beige/white for consistency */
    border: 2px solid rgba(175, 200, 160, 0.3);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.image-placeholder {
    color: rgba(255, 252, 247, 0.5);
    font-size: 1rem;
    text-align: center;
}

.step-image img,
.step-image video,
.step-image canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.step-content {
    flex: 1;
    position: relative; /* Allow marker positioning relative to content */
    padding-top: 10px; /* Add space at top for marker above title */
}

/* Position marker relative to step-content (where title is) using CSS */
/* This works for both desktop (2-column) and mobile (1-column) layouts */
.timeline-step .step-marker,
.stage1-step .step-marker {
    position: absolute;
    /* On desktop: position at start of content column */
    /* On mobile: position at start of content (which is below image) */
    /* We'll use JavaScript to calculate the exact position dynamically */
}

/* Alternative: Position marker using step-content as reference via CSS variable or calculation */
/* Since step-content is in the right column, we can position marker relative to it */
.timeline-step .step-content-wrapper .step-content,
.stage1-step .step-content-wrapper .step-content {
    /* This is where the title is - marker should be above this */
}

.step-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #fffcf7;
    margin: 0 0 16px 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.step-description {
    font-size: 1.125rem;
    color: rgba(255, 252, 247, 0.85);
    line-height: 1.7;
    margin: 0;
}

/* Sensor Reading Components */
.sensor-reading-wrapper {
    width: 100%;
    max-width: 700px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
}

.sensor-container {
    position: relative;
    width: 100%;
    max-width: 380px !important;
    height: 300px !important; /* Match step-image height */
    display: flex;
    align-items: center;
    justify-content: center;
    transform: none;
    transform-origin: center center;
}

.arm-with-sensor {
    position: relative;
    width: 100%;
    max-width: 380px !important;
    display: flex;
    align-items: center;
    justify-content: center;
}

.arm-with-sensor img {
    width: 100% !important;
    height: auto !important;
    max-width: 380px !important;
    max-height: 300px !important;
    object-fit: contain;
    transform: none !important;
    transform-origin: center center;
    position: relative;
    z-index: 1 !important; /* Ensure image is behind sensor overlay */
}

.emg-sensor-overlay {
    position: absolute;
    top: calc(50% + 40px);
    left: 50%;
    transform: translate(-50%, -50%) scale(0.38); /* Shrunk further on Stage 2 */
    width: 200px;
    height: 200px;
    pointer-events: none;
    z-index: 10 !important; /* Ensure sensor overlay is on top of the image */
}

.electrode-pad {
    position: absolute;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #e8e8e8, #c0c0c0);
    border-radius: 50%;
    box-shadow: 
        inset 0 2px 4px rgba(0, 0, 0, 0.2),
        0 4px 12px rgba(0, 0, 0, 0.15);
}

.electrode-pad::before {
    content: '';
    position: absolute;
    inset: 6px;
    background: linear-gradient(135deg, #006d8f, #0088cc);
    border-radius: 50%;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.3);
}

.electrode-pad::after {
    content: '';
    position: absolute;
    inset: 12px;
    background: #1a1a1a;
    border-radius: 50%;
    box-shadow: 
        inset 0 2px 4px rgba(0, 0, 0, 0.6),
        0 0 8px rgba(175, 200, 160, 0.4);
    animation: electrodeFlash 2s ease-in-out infinite;
}

@keyframes electrodeFlash {
    0%, 100% { 
        box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.6), 0 0 8px rgba(175, 200, 160, 0.4);
    }
    50% { 
        box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.6), 0 0 20px rgba(175, 200, 160, 1);
    }
}

.electrode-1 {
    top: 15%;
    left: 50%;
    transform: translateX(-50%);
}

.electrode-2 {
    bottom: 15%;
    left: 50%;
    transform: translateX(-50%);
}

.electrode-3 {
    top: 50%;
    left: 10%;
    transform: translateY(-50%);
}

.sensor-hub {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #a0a0a0, #707070);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.sensor-hub::before {
    content: '';
    position: absolute;
    inset: -4px;
    background: linear-gradient(45deg, #909090, #606060);
    border-radius: 12px;
    z-index: -1;
    animation: hubPulse 2s ease-in-out infinite;
}

@keyframes hubPulse {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.05); }
}

.sensor-icon {
    font-size: 2.2rem;
    color: white;
}

.wire {
    position: absolute;
    background: linear-gradient(to bottom, #afc8a0, #8fb87a);
    width: 3px;
    transform-origin: center;
}

.wire-1 {
    top: 32px;
    left: 50%;
    height: 40px;
    transform: translateX(-50%);
}

.wire-2 {
    bottom: 32px;
    left: 50%;
    height: 40px;
    transform: translateX(-50%);
}

.wire-3 {
    top: 50%;
    left: 30px;
    width: 45px;
    height: 3px;
    transform: translateY(-50%);
}

.signal-pulse {
    position: absolute;
    width: 8px;
    height: 8px;
    background: #afc8a0;
    border-radius: 50%;
    box-shadow: 0 0 12px rgba(175, 200, 160, 0.8);
    opacity: 0;
}

.pulse-1 {
    top: 32px;
    left: 50%;
    animation: pulseDown 2s ease-in-out infinite;
}

.pulse-2 {
    bottom: 32px;
    left: 50%;
    animation: pulseUp 2s ease-in-out infinite 0.3s;
}

.pulse-3 {
    top: 50%;
    left: 30px;
    animation: pulseRight 2s ease-in-out infinite 0.6s;
}

@keyframes pulseDown {
    0%, 100% { opacity: 0; transform: translate(-50%, 0); }
    50% { opacity: 1; transform: translate(-50%, 40px); }
}

@keyframes pulseUp {
    0%, 100% { opacity: 0; transform: translate(-50%, 0); }
    50% { opacity: 1; transform: translate(-50%, -40px); }
}

@keyframes pulseRight {
    0%, 100% { opacity: 0; transform: translate(0, -50%); }
    50% { opacity: 1; transform: translate(45px, -50%); }
}

/* Device Integration */
.device-integration-wrapper {
    width: 100%;
    max-width: 700px;
    position: relative;
}

/* Stage 3: Sensor + Brace integration layout */
.device-integration-wrapper.sensor-plus-brace {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    max-width: 100%;
    padding: 0.5rem 0;
}

.integration-sensor-side,
.integration-brace-side {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    min-width: 0;
}

.integration-sensor-side .arm-with-sensor.integration-arm {
    position: relative;
    max-width: 88px; /* Shrunk by 60% (220 * 0.4) */
    width: 100%;
}

.integration-sensor-side .arm-with-sensor.integration-arm img {
    width: 100%;
    height: auto;
    max-width: 88px;
    display: block;
}

.integration-sensor-side .emg-sensor-overlay.integration-sensor-overlay {
    transform: translate(-50%, -50%) scale(0.18); /* Shrunk by 60% (0.45 * 0.4) */
    top: calc(50% + 20px);
    left: 50%;
}

.integration-connector {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    flex-shrink: 0;
    color: rgba(255, 252, 247, 0.8);
}

.integration-arrow {
    font-size: 1.75rem;
    color: #afc8a0;
    font-weight: 700;
}

.integration-connector-text {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255, 252, 247, 0.7);
}

.integration-brace-side .brace-image {
    width: 100%;
    max-width: 220px;
    height: auto;
    object-fit: contain;
    display: block;
    margin-top: 20px;
}

.integration-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 252, 247, 0.8);
}

/* Stage 3: center Custom EMG Sensor label with the arm/sensor image */
.integration-sensor-side .integration-label {
    display: block;
    width: 100%;
    max-width: 88px; /* Match arm image width */
    text-align: center;
}

.integration-brace-side .integration-label {
    margin-top: 40px;
}

/* Stage 3 box: text in teal */
.timeline-step[data-step="3"] .integration-label,
.timeline-step[data-step="3"] .integration-connector-text {
    color: #006d8f;
}

.timeline-step[data-step="3"] .integration-connector {
    color: #006d8f;
}

.timeline-step[data-step="3"] .integration-arrow {
    color: #006d8f;
}

.device-container {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.2);
}

.device-image {
    width: 100%;
    display: block;
}

.sensor-highlight {
    position: absolute;
    top: 38%;
    left: 28%;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(175, 200, 160, 0.6), transparent 70%);
    opacity: 0.8;
    pointer-events: none;
}

.sensor-label {
    position: absolute;
    top: 30%;
    left: 28%;
    background: rgba(0, 109, 143, 0.95);
    color: white;
    padding: 0.7rem 1.2rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.sensor-label::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid rgba(0, 109, 143, 0.95);
}

/* Stage 4: Working prototype badge */
.working-prototype-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 5;
    background: rgba(175, 200, 160, 0.95);
    color: #006d8f;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 6px 12px;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* Device Action - Stage 4: same background/border as other step-image areas */
.action-wrapper {
    position: relative;
    width: 100%;
    height: 300px;
    background: #fffcf7; /* beige/white for consistency */
    border: 2px solid rgba(175, 200, 160, 0.3);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Stage 4 only: action-wrapper and step-image grow with GIF (proportional border) */
.timeline-step:last-child .step-image,
.timeline-step[data-step="4"] .step-image {
    height: auto;
    min-height: 300px;
    overflow: visible; /* allow tap indicator to overlap bottom border */
}

/* Stage 5: step-image tall enough so Patient App & Physician App phones + labels stay inside box */
.timeline-step[data-step="5"] .step-image {
    min-height: 390px;
    height: auto;
}

.timeline-step:last-child .action-wrapper,
.timeline-step[data-step="4"] .action-wrapper {
    height: auto;
    min-height: 300px;
}

/* Allow tap indicator to overlap bottom border (extend below box) */
.timeline-step[data-step="4"] .action-wrapper {
    overflow: visible;
}

.gif-container {
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* When GIF is present: container sizes to image */
.gif-container:has(img.device-gif) {
    width: 100%;
    height: auto;
}

/* Full GIF visible, proportional: image sets box size */
.gif-container img.device-gif {
    max-width: 100%;
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
    object-position: center;
}

/* Hide placeholder when GIF is present */
.gif-container:has(img.device-gif) .gif-placeholder {
    display: none;
}

.gif-placeholder {
    text-align: center;
    padding: 3rem;
    color: rgba(255, 252, 247, 0.5);
}

.placeholder-icon {
    font-size: 5rem;
    color: #afc8a0;
    margin-bottom: 1rem;
}