/* ============================================
   prototype.quest - The Inventor's Workshop
   Color Palette: "The Inventor's Light Table"
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --deep-blueprint: #0A1628;
    --drafting-surface: #132238;
    --filament-amber: #D4A574;
    --vellum-white: #EDE8DF;
    --construction-red: #C45B4A;
    --prototype-teal: #3A8F8F;
    --ghost-line: #2A4060;
    --test-signal-green: #7ABF6E;

    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Commissioner', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;

    --sidebar-width: 80px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: clamp(0.95rem, 1.8vw, 1.15rem);
    line-height: 1.72;
    color: var(--vellum-white);
    background-color: var(--deep-blueprint);
    cursor: none;
    overflow-x: hidden;
    position: relative;
}

/* --- Grid Paper Texture Overlay --- */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    background-image:
        /* Minor grid lines every 20px */
        linear-gradient(to right, rgba(42, 64, 96, 0.04) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(42, 64, 96, 0.04) 1px, transparent 1px),
        /* Major grid lines every 100px */
        linear-gradient(to right, rgba(42, 64, 96, 0.06) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(42, 64, 96, 0.06) 1px, transparent 1px);
    background-size:
        20px 20px,
        20px 20px,
        100px 100px,
        100px 100px;
}

/* --- 16-column Engineering Grid (low opacity) --- */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    background-image: repeating-linear-gradient(
        to right,
        rgba(212, 165, 116, 0.02) 0px,
        rgba(212, 165, 116, 0.02) 1px,
        transparent 1px,
        transparent calc(100% / 16)
    );
}

/* --- Scroll Progress Indicator --- */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background-color: var(--construction-red);
    z-index: 1000;
    transition: background-color 0.5s ease;
}

#scroll-progress.complete {
    background-color: var(--test-signal-green);
    animation: flashGreen 0.4s ease-out;
}

#scroll-progress.settled {
    background-color: var(--prototype-teal);
}

@keyframes flashGreen {
    0% { opacity: 1; box-shadow: 0 0 10px var(--test-signal-green); }
    50% { opacity: 0.5; box-shadow: 0 0 20px var(--test-signal-green); }
    100% { opacity: 1; box-shadow: none; }
}

/* --- Custom Cursor --- */
#custom-cursor {
    position: fixed;
    width: 32px;
    height: 32px;
    pointer-events: none;
    z-index: 10000;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity 0.2s ease;
}

body:hover #custom-cursor {
    opacity: 1;
}

#custom-cursor .cursor-center {
    opacity: 0;
    transition: opacity 0.2s ease;
}

body.cursor-interactive #custom-cursor .cursor-center {
    opacity: 1;
}

body.cursor-interactive #custom-cursor svg line {
    stroke-width: 0.8;
}

/* --- Annotation Sidebar --- */
#annotation-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    z-index: 100;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 30px;
    padding: 20px 8px;
}

.sidebar-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    opacity: 0;
    transform: scale(0.7);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.sidebar-item.visible {
    opacity: 1;
    transform: scale(1);
}

.sidebar-item.active .version-badge {
    border-color: var(--filament-amber);
    box-shadow: 0 0 8px rgba(212, 165, 116, 0.3);
}

.version-badge {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1.5px solid var(--construction-red);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: badgePulse 3s ease-in-out infinite;
}

.version-badge span {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--vellum-white);
    letter-spacing: 0;
}

@keyframes badgePulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

.sidebar-label {
    font-family: var(--font-mono);
    font-size: 0.55rem;
    color: var(--filament-amber);
    letter-spacing: 0.08em;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    transform: rotate(180deg);
    opacity: 0.7;
}

.sidebar-icon {
    width: 18px;
    height: 18px;
    opacity: 0.5;
}

/* --- Stage Navigation Dots --- */
#stage-nav {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 1000;
}

.stage-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 1.5px solid var(--ghost-line);
    background: transparent;
    cursor: none;
    padding: 0;
    transition: border-color 0.3s ease, background-color 0.3s ease, transform 0.3s ease;
}

.stage-dot.active {
    border-color: var(--filament-amber);
    background-color: var(--filament-amber);
    transform: scale(1.3);
}

.stage-dot:hover {
    border-color: var(--prototype-teal);
    background-color: var(--prototype-teal);
}

/* --- Stage Sections --- */
.stage {
    position: relative;
    min-height: 100vh;
    padding-left: calc(var(--sidebar-width) + 40px);
    padding-right: 60px;
    padding-top: 80px;
    padding-bottom: 80px;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: background-color 0.4s ease;
}

.stage[data-bg="deep"] {
    background-color: var(--deep-blueprint);
}

.stage[data-bg="drafting"] {
    background-color: var(--drafting-surface);
}

/* --- Blueprint Fold Lines --- */
.blueprint-fold-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: repeating-linear-gradient(
        to right,
        var(--ghost-line) 0px,
        var(--ghost-line) 4px,
        transparent 4px,
        transparent 12px
    );
    opacity: 0.15;
}

.blueprint-fold-line::before {
    content: '';
    position: absolute;
    top: -3px;
    left: 0;
    width: 100%;
    height: 7px;
    background: repeating-linear-gradient(
        to right,
        transparent 0px,
        transparent 97px,
        var(--ghost-line) 97px,
        var(--ghost-line) 103px,
        transparent 103px
    );
    background-size: 100px 7px;
    opacity: 0.15;
}

/* Fold line draw animation */
.blueprint-fold-line {
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease-out;
}

.stage.in-view .blueprint-fold-line {
    transform: scaleX(1);
}

/* --- Stage Labels --- */
.stage-label {
    display: flex;
    align-items: baseline;
    gap: 16px;
    margin-bottom: 40px;
}

.stage-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--filament-amber);
    opacity: 0.7;
    letter-spacing: 0.08em;
}

.stage-name {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 3.2rem);
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--filament-amber);
    opacity: 0;
    transition: opacity 0.6s ease 0.3s;
}

.stage.in-view .stage-name {
    opacity: 1;
}

/* --- Hero Block --- */
.hero-block {
    margin-bottom: 60px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 7vw, 6rem);
    font-weight: 500;
    letter-spacing: 0.06em;
    color: var(--filament-amber);
    margin-bottom: 24px;
    overflow: hidden;
}

.hero-subtitle {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: clamp(1.1rem, 2.2vw, 1.4rem);
    color: var(--vellum-white);
    opacity: 0.8;
    max-width: 560px;
}

/* --- Section Titles --- */
.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 3.2rem);
    font-weight: 500;
    letter-spacing: 0.06em;
    color: var(--vellum-white);
    margin-bottom: 40px;
}

/* --- Construct Text Animation --- */
.construct-text {
    opacity: 0;
    transition: opacity 0.6s ease;
}

.construct-text.revealed {
    opacity: 1;
}

.construct-text .char {
    display: inline-block;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.construct-text .char.visible {
    opacity: 1;
    transform: translateY(0);
}

.construct-text .char.space {
    width: 0.3em;
}

/* --- Typewriter Text --- */
.typewriter-text {
    overflow: hidden;
}

.typewriter-text .tw-char {
    opacity: 0;
    transition: opacity 0.05s ease;
}

.typewriter-text .tw-char.visible {
    opacity: 1;
}

/* --- Patent Illustrations --- */
.patent-illustration {
    max-width: 600px;
    width: 100%;
    margin: 40px 0;
    position: relative;
}

.patent-svg {
    width: 100%;
    height: auto;
}

/* Path drawing animation */
.draw-path {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    transition: stroke-dashoffset 0.8s ease-out;
}

.patent-illustration.revealed .draw-path {
    stroke-dashoffset: 0;
}

/* Stagger the drawing of paths */
.patent-illustration.revealed .draw-group .draw-path:nth-child(1) { transition-delay: 0ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(2) { transition-delay: 200ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(3) { transition-delay: 400ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(4) { transition-delay: 600ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(5) { transition-delay: 800ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(6) { transition-delay: 1000ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(7) { transition-delay: 1200ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(8) { transition-delay: 1400ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(9) { transition-delay: 1600ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(10) { transition-delay: 1800ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(11) { transition-delay: 2000ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(12) { transition-delay: 2200ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(13) { transition-delay: 100ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(14) { transition-delay: 300ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(15) { transition-delay: 500ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(16) { transition-delay: 700ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(17) { transition-delay: 900ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(18) { transition-delay: 1100ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(19) { transition-delay: 1300ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(20) { transition-delay: 1500ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(21) { transition-delay: 1700ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(22) { transition-delay: 1900ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(23) { transition-delay: 2100ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(24) { transition-delay: 2300ms; }
.patent-illustration.revealed .draw-group .draw-path:nth-child(25) { transition-delay: 2500ms; }

/* Cross-hatching group paths */
.draw-path-group line {
    stroke-dasharray: 500;
    stroke-dashoffset: 500;
    transition: stroke-dashoffset 0.6s ease-out;
}

.patent-illustration.revealed .draw-path-group line {
    stroke-dashoffset: 0;
}

.patent-illustration.revealed .draw-path-group line:nth-child(1) { transition-delay: 1500ms; }
.patent-illustration.revealed .draw-path-group line:nth-child(2) { transition-delay: 1600ms; }
.patent-illustration.revealed .draw-path-group line:nth-child(3) { transition-delay: 1700ms; }
.patent-illustration.revealed .draw-path-group line:nth-child(4) { transition-delay: 1800ms; }
.patent-illustration.revealed .draw-path-group line:nth-child(5) { transition-delay: 1900ms; }
.patent-illustration.revealed .draw-path-group line:nth-child(6) { transition-delay: 2000ms; }
.patent-illustration.revealed .draw-path-group line:nth-child(7) { transition-delay: 2100ms; }

/* Annotation text */
.annotation-text {
    font-family: var(--font-mono);
    font-size: 10px;
    fill: var(--filament-amber);
    opacity: 0.7;
    letter-spacing: 0.08em;
}

/* Callout elements */
.callout-group {
    opacity: 0;
    transition: opacity 0.4s ease 2s;
}

.patent-illustration.revealed .callout-group {
    opacity: 1;
}

.callout-number {
    font-family: var(--font-mono);
    font-size: 8px;
    fill: var(--construction-red);
    letter-spacing: 0;
}

/* Signal path animation */
.signal-path {
    stroke-dasharray: 600;
    stroke-dashoffset: 600;
}

.patent-illustration.revealed .signal-path {
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1.2s ease-out 1s;
}

/* --- Hover Annotations (Leader Lines) --- */
.patent-svg g[data-tooltip] {
    cursor: none;
}

.hover-annotation {
    position: absolute;
    background-color: var(--deep-blueprint);
    border: 1px solid var(--construction-red);
    color: var(--vellum-white);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 6px 10px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s ease;
    z-index: 50;
    white-space: nowrap;
    letter-spacing: 0.08em;
}

.hover-annotation.visible {
    opacity: 1;
}

/* --- Stage Descriptions --- */
.stage-description {
    max-width: 640px;
    margin: 30px 0;
}

.stage-description p {
    font-family: var(--font-body);
    font-weight: 300;
    line-height: 1.72;
    color: var(--vellum-white);
    opacity: 0.85;
}

/* --- Breakout Panels --- */
.breakout-panel {
    margin: 60px calc(-1 * var(--sidebar-width) - 40px) 60px -40px;
    padding: 50px calc(var(--sidebar-width) + 40px + 40px) 50px calc(40px + 40px);
    background-color: rgba(42, 64, 96, 0.12);
    border-top: 1px solid rgba(42, 64, 96, 0.3);
    border-bottom: 1px solid rgba(42, 64, 96, 0.3);
    position: relative;
    width: 100vw;
}

.breakout-content {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    max-width: 1000px;
}

.breakout-item {
    flex: 1;
    position: relative;
    padding-top: 30px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.breakout-item.revealed {
    opacity: 1;
    transform: translateY(0);
}

.breakout-connector {
    position: absolute;
    top: 0;
    left: 50%;
    width: 1px;
    height: 24px;
    background-color: var(--construction-red);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.3s ease;
}

.breakout-connector::before {
    content: '';
    position: absolute;
    top: 0;
    left: -3px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    border: 1px solid var(--construction-red);
    background: var(--deep-blueprint);
}

.breakout-item.revealed .breakout-connector {
    transform: scaleY(1);
}

.breakout-label {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.breakout-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    color: var(--filament-amber);
}

.breakout-detail {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 0.9rem;
    color: var(--vellum-white);
    opacity: 0.7;
    line-height: 1.5;
}

/* --- Assembly Grid --- */
.assembly-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 500px;
    margin: 40px 0;
}

.assembly-cell {
    border: 1px solid var(--ghost-line);
    padding: 20px;
    position: relative;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.assembly-cell.revealed {
    opacity: 1;
    transform: translateY(0);
}

.assembly-cell::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    width: 8px;
    height: 8px;
    border-top: 1.5px solid var(--filament-amber);
    border-left: 1.5px solid var(--filament-amber);
}

.assembly-cell::after {
    content: '';
    position: absolute;
    bottom: -1px;
    right: -1px;
    width: 8px;
    height: 8px;
    border-bottom: 1.5px solid var(--filament-amber);
    border-right: 1.5px solid var(--filament-amber);
}

.cell-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--filament-amber);
    opacity: 0.7;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.cell-value {
    display: block;
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 1.05rem;
    color: var(--vellum-white);
}

/* --- Test Results --- */
.test-results {
    max-width: 440px;
    margin: 40px 0;
    border: 1px solid var(--ghost-line);
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.test-results.revealed {
    opacity: 1;
    transform: translateY(0);
}

.test-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    border-bottom: 1px solid rgba(42, 64, 96, 0.3);
}

.test-row:last-child {
    border-bottom: none;
}

.test-name {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 0.9rem;
    color: var(--vellum-white);
    opacity: 0.8;
}

.test-status {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    padding: 2px 8px;
}

.test-status.pass {
    color: var(--test-signal-green);
    border: 1px solid rgba(122, 191, 110, 0.3);
}

.test-status.fail {
    color: var(--construction-red);
    border: 1px solid rgba(196, 91, 74, 0.3);
}

/* --- Launch Status --- */
.launch-status {
    margin: 50px 0;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.launch-status.revealed {
    opacity: 1;
    transform: translateY(0);
}

.launch-indicator {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 24px;
}

.launch-badge {
    width: 60px;
    height: 60px;
}

.launch-badge circle {
    stroke-dasharray: 200;
    stroke-dashoffset: 200;
    transition: stroke-dashoffset 1s ease-out;
}

.launch-status.revealed .launch-badge circle {
    stroke-dashoffset: 0;
}

.launch-badge polyline {
    stroke-dasharray: 50;
    stroke-dashoffset: 50;
    transition: stroke-dashoffset 0.5s ease-out 0.8s;
}

.launch-status.revealed .launch-badge polyline {
    stroke-dashoffset: 0;
}

.launch-text {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    color: var(--test-signal-green);
}

.launch-meta {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.meta-item {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--filament-amber);
    opacity: 0.7;
    letter-spacing: 0.08em;
}

/* --- Closing Note --- */
.closing-note {
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid rgba(42, 64, 96, 0.3);
    max-width: 500px;
}

.closing-note p {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 1.1rem;
    color: var(--filament-amber);
    opacity: 0.9;
    font-style: italic;
}

/* --- Construction Lines Overlay --- */
.construction-lines-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 3;
}

.construction-line {
    stroke: var(--ghost-line);
    stroke-width: 1;
    opacity: 0.15;
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    transition: stroke-dashoffset 0.8s ease-out;
}

.construction-line.drawn {
    stroke-dashoffset: 0;
}

/* --- Construct Element Animation (generic) --- */
.construct-element {
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.construct-element.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* --- Stagger delays for construct elements --- */
.assembly-cell:nth-child(1) { transition-delay: 0ms; }
.assembly-cell:nth-child(2) { transition-delay: 150ms; }
.assembly-cell:nth-child(3) { transition-delay: 300ms; }
.assembly-cell:nth-child(4) { transition-delay: 450ms; }

.breakout-item:nth-child(1) { transition-delay: 0ms; }
.breakout-item:nth-child(2) { transition-delay: 200ms; }
.breakout-item:nth-child(3) { transition-delay: 400ms; }

/* --- Stage Visual Density Progression --- */
/* Stage 1: Sparse, faint */
#stage-1 { opacity: 0.95; }
#stage-1 .patent-svg { opacity: 0.7; }

/* Stage 2: Slightly more defined */
#stage-2 .patent-svg { opacity: 0.8; }

/* Stage 3: Building complexity */
#stage-3 .patent-svg { opacity: 0.85; }

/* Stage 4: Rich detail */
#stage-4 .patent-svg { opacity: 0.9; }

/* Stage 5: Full density */
#stage-5 .patent-svg { opacity: 1; }
#stage-5 .stage-description p { opacity: 1; }

/* --- Mobile Adaptation --- */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 0px;
    }

    body {
        cursor: auto;
    }

    #custom-cursor {
        display: none;
    }

    #annotation-sidebar {
        width: 4px;
        padding: 0;
        gap: 0;
    }

    .sidebar-item {
        display: none;
    }

    #annotation-sidebar::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 4px;
        height: 100%;
        background-color: var(--ghost-line);
        transition: background-color 0.3s ease;
    }

    #annotation-sidebar.stage-1::before { background-color: var(--filament-amber); }
    #annotation-sidebar.stage-2::before { background-color: var(--construction-red); }
    #annotation-sidebar.stage-3::before { background-color: var(--prototype-teal); }
    #annotation-sidebar.stage-4::before { background-color: var(--construction-red); }
    #annotation-sidebar.stage-5::before { background-color: var(--test-signal-green); }

    .stage {
        padding-left: 20px;
        padding-right: 20px;
        padding-top: 60px;
        padding-bottom: 60px;
    }

    .hero-title {
        font-size: clamp(2.2rem, 10vw, 3.5rem);
    }

    .breakout-panel {
        margin-left: -20px;
        margin-right: -20px;
        padding: 30px 20px;
        width: calc(100% + 40px);
    }

    .breakout-content {
        flex-direction: column;
        gap: 30px;
    }

    .assembly-grid {
        grid-template-columns: 1fr;
    }

    .launch-meta {
        flex-direction: column;
        gap: 10px;
    }

    #stage-nav {
        bottom: 20px;
        right: 20px;
    }

    .patent-illustration {
        max-width: 100%;
    }

    /* Keep stroke width on mobile for legibility */
    .patent-svg g[stroke-width] {
        stroke-width: 1.5;
    }
}

/* --- Tablet Adaptation --- */
@media (min-width: 769px) and (max-width: 1024px) {
    .stage {
        padding-left: calc(var(--sidebar-width) + 20px);
        padding-right: 30px;
    }

    .breakout-panel {
        margin-left: calc(-1 * var(--sidebar-width) - 20px);
        padding-left: calc(var(--sidebar-width) + 20px + 20px);
        padding-right: 30px;
    }
}

/* --- Selection Color --- */
::selection {
    background-color: rgba(212, 165, 116, 0.3);
    color: var(--vellum-white);
}

/* --- Scrollbar Styling --- */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--deep-blueprint);
}

::-webkit-scrollbar-thumb {
    background: var(--ghost-line);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--filament-amber);
}