/* ============================================================
   DDAZZL.com - Sunset HUD Watercolor Design System
   ============================================================ */

/* --- CSS Custom Properties (Palette) --- */
:root {
    --burnt-umber-night: #1A0E08;
    --twilight-cocoa: #2C1810;
    --terracotta-dusk: #B85A3A;
    --molten-amber: #E8913A;
    --sunset-gold: #F4C56C;
    --horizon-rose: #E87C6C;
    --parchment-glow: #FFF0E0;
    --faded-sienna: #D4A574;
    --dusk-violet: #3A1830;

    --hud-border: rgba(255, 200, 160, 0.3);
    --hud-bg: rgba(30, 20, 18, 0.65);
    --grid-line-color: rgba(255, 180, 120, 0.12);
    --connection-line: rgba(232, 145, 58, 0.06);
    --particle-color: #F4C56C;
    --particle-rose: #E87C6C;

    --ease-warm: cubic-bezier(0.25, 0.1, 0.25, 1.0);
    --panel-duration: 600ms;
    --stagger-delay: 100ms;

    --font-heading: 'Space Grotesk', sans-serif;
    --font-mono: 'Overpass Mono', monospace;
    --font-body: 'Cormorant Garamond', serif;
    --font-accent: 'Caveat', cursive;
}

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

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

body {
    background-color: var(--burnt-umber-night);
    color: var(--parchment-glow);
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 18px;
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Hidden SVG Filters --- */
.svg-filters {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

/* --- Paper Texture Overlay --- */
.paper-texture {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
    background-repeat: repeat;
}

/* --- Particle Canvas --- */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5;
    pointer-events: none;
}

/* --- Navigation --- */
.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 48px;
    z-index: 900;
    background: rgba(26, 14, 8, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--hud-border);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 32px;
    max-width: 1400px;
    margin: 0 auto;
}

.nav-logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 16px;
    letter-spacing: 0.08em;
    color: var(--molten-amber);
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-link {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--faded-sienna);
    text-decoration: none;
    transition: color 0.3s var(--ease-warm), text-shadow 0.3s var(--ease-warm);
    position: relative;
}

.nav-link::before {
    content: attr(data-label);
    font-size: 9px;
    position: absolute;
    top: -10px;
    left: 0;
    color: var(--terracotta-dusk);
    opacity: 0.5;
}

.nav-link:hover {
    color: var(--sunset-gold);
    text-shadow: 0 0 12px rgba(244, 197, 108, 0.4);
}

.nav-status {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-status-label {
    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--faded-sienna);
    opacity: 0.6;
}

.nav-status-value {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--molten-amber);
    min-width: 36px;
    text-align: right;
}

/* --- Grid Overlay --- */
.grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3;
    pointer-events: none;
    display: flex;
    justify-content: center;
    padding: 0 32px;
    max-width: 1400px;
    margin: 0 auto;
    left: 50%;
    transform: translateX(-50%);
    transition: opacity 0.8s var(--ease-warm);
}

.grid-overlay.fade-out {
    opacity: 0;
}

.grid-line {
    flex: 1;
    border-right: 1px solid var(--grid-line-color);
    height: 100%;
    transition: opacity 0.6s var(--ease-warm);
}

.grid-line:last-child {
    border-right: none;
}

/* --- Scene Base --- */
.scene {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.scene-opening { min-height: 100vh; }
.scene-identity { min-height: 100vh; }
.scene-showcase { min-height: 150vh; }
.scene-interlude { min-height: 80vh; }
.scene-closing { min-height: 100vh; }

.scene-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.scene-bg-opening {
    background: linear-gradient(175deg, #1A0E08 0%, #2C1810 30%, #3A1830 60%, #B85A3A 85%, #E8913A 100%);
}

.scene-bg-identity {
    background: linear-gradient(180deg, #2C1810 0%, #3A1830 40%, #B85A3A 70%, #E8913A 100%);
}

.scene-bg-showcase {
    background: linear-gradient(175deg, #1A0E08 0%, #2C1810 25%, #3A1830 50%, #2C1810 75%, #1A0E08 100%);
}

.scene-bg-interlude {
    background: linear-gradient(180deg, #3A1830 0%, #B85A3A 30%, #E8913A 50%, #F4C56C 70%, #E87C6C 90%, #3A1830 100%);
}

.scene-bg-closing {
    background: linear-gradient(175deg, #2C1810 0%, #3A1830 30%, #1A0E08 60%, #1A0E08 100%);
}

/* --- Watercolor Washes --- */
.watercolor-wash {
    position: absolute;
    z-index: 2;
    pointer-events: none;
    border-radius: 50%;
}

.wash-opening {
    width: 120%;
    height: 80%;
    top: 20%;
    left: -10%;
    background: radial-gradient(ellipse at 30% 50%, rgba(232, 124, 108, 0.15), rgba(58, 24, 48, 0.1) 60%, transparent);
    filter: url(#watercolor-wash);
}

.wash-identity {
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: radial-gradient(ellipse at 70% 40%, rgba(232, 145, 58, 0.12), rgba(184, 90, 58, 0.08) 50%, transparent);
    filter: url(#watercolor-wash);
}

.wash-showcase {
    width: 140%;
    height: 60%;
    top: 30%;
    left: -20%;
    background: radial-gradient(ellipse at 50% 50%, rgba(58, 24, 48, 0.2), rgba(232, 124, 108, 0.08) 60%, transparent);
    filter: url(#watercolor-wash);
}

.wash-interlude-1 {
    width: 150%;
    height: 120%;
    top: -10%;
    left: -25%;
    background: radial-gradient(ellipse at 40% 50%, rgba(232, 145, 58, 0.25), rgba(244, 197, 108, 0.1) 50%, transparent);
    filter: url(#watercolor-wash);
}

.wash-interlude-2 {
    width: 100%;
    height: 100%;
    top: 10%;
    left: 20%;
    background: radial-gradient(ellipse at 60% 40%, rgba(232, 124, 108, 0.2), rgba(184, 90, 58, 0.08) 60%, transparent);
    filter: url(#watercolor-wash);
}

.wash-interlude-3 {
    width: 80%;
    height: 80%;
    top: 15%;
    left: 10%;
    background: radial-gradient(ellipse at 30% 60%, rgba(244, 197, 108, 0.15), transparent 70%);
    filter: url(#watercolor-wash);
}

.wash-closing {
    width: 120%;
    height: 80%;
    top: 10%;
    left: -10%;
    background: radial-gradient(ellipse at 50% 50%, rgba(58, 24, 48, 0.18), rgba(26, 14, 8, 0.15) 60%, transparent);
    filter: url(#watercolor-wash);
}

/* --- Scene Content --- */
.scene-content {
    position: relative;
    z-index: 10;
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 32px;
}

/* --- HUD Panel System --- */
.hud-panel {
    position: relative;
    border: 1px solid var(--hud-border);
    background: var(--hud-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    clip-path: polygon(
        8px 0%, 100% 0%,
        100% calc(100% - 8px), calc(100% - 8px) 100%,
        0% 100%, 0% 8px
    );
    border-radius: 4px;
    box-shadow: inset 0 0 30px rgba(232, 145, 58, 0.04);
    transition: transform var(--panel-duration) var(--ease-warm),
                opacity var(--panel-duration) var(--ease-warm);
}

.hud-panel-inner {
    padding: 28px 32px;
    position: relative;
}

/* HUD Panel glow */
.hud-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(232, 145, 58, 0.08), transparent 70%);
    pointer-events: none;
    z-index: -1;
}

/* HUD Panel bleed effect */
.hud-panel::after {
    content: '';
    position: absolute;
    top: -8px;
    left: -8px;
    right: -8px;
    bottom: -8px;
    background: radial-gradient(ellipse at center, rgba(232, 145, 58, 0.03), transparent 60%);
    filter: blur(12px);
    pointer-events: none;
    z-index: -2;
}

/* --- HUD Corner Motifs --- */
.hud-corner-motif {
    position: absolute;
    width: 20px;
    height: 20px;
    z-index: 2;
}

.hud-corner-motif.top-left {
    top: 6px;
    left: 6px;
    border-top: 1px solid var(--terracotta-dusk);
    border-left: 1px solid var(--terracotta-dusk);
    opacity: 0.5;
}

.hud-corner-motif.top-right {
    top: 6px;
    right: 6px;
    border-top: 1px solid var(--terracotta-dusk);
    border-right: 1px solid var(--terracotta-dusk);
    opacity: 0.5;
}

.hud-corner-motif.bottom-left {
    bottom: 6px;
    left: 6px;
    border-bottom: 1px solid var(--terracotta-dusk);
    border-left: 1px solid var(--terracotta-dusk);
    opacity: 0.5;
}

.hud-corner-motif.bottom-right {
    bottom: 6px;
    right: 6px;
    border-bottom: 1px solid var(--terracotta-dusk);
    border-right: 1px solid var(--terracotta-dusk);
    opacity: 0.5;
}

/* --- HUD Label --- */
.hud-label {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--faded-sienna);
    margin-bottom: 16px;
    display: block;
}

/* --- Typography --- */
.hero-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 72px;
    letter-spacing: -0.02em;
    color: var(--parchment-glow);
    line-height: 1.1;
    margin-bottom: 24px;
    min-height: 86px;
}

.hero-title .cursor {
    display: inline-block;
    width: 3px;
    height: 0.85em;
    background: var(--molten-amber);
    margin-left: 2px;
    vertical-align: baseline;
    animation: cursor-blink 0.8s step-end infinite;
}

@keyframes cursor-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-subtitle-row {
    display: flex;
    align-items: center;
    gap: 16px;
}

.hero-divider {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--terracotta-dusk), transparent);
    opacity: 0.4;
}

.section-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 48px;
    letter-spacing: -0.02em;
    color: var(--parchment-glow);
    line-height: 1.15;
    margin-bottom: 20px;
}

.panel-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 28px;
    letter-spacing: -0.02em;
    color: var(--parchment-glow);
    line-height: 1.2;
    margin-bottom: 12px;
}

.body-text {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 18px;
    line-height: 1.7;
    color: #F0E0D0;
    margin-bottom: 16px;
}

.body-text:last-child {
    margin-bottom: 0;
}

/* --- Annotations (Caveat handwriting) --- */
.annotation {
    font-family: var(--font-accent);
    font-size: 24px;
    font-weight: 400;
    color: rgba(255, 140, 100, 0.8);
    position: absolute;
    pointer-events: none;
    white-space: nowrap;
}

.annotation-1 {
    bottom: 25%;
    right: 5%;
    transform: rotate(-3deg);
}

.annotation-2 {
    top: 30%;
    left: 3%;
    transform: rotate(2deg);
}

.annotation[data-animate="bob"] {
    animation: bob-float 4s ease-in-out infinite;
}

@keyframes bob-float {
    0%, 100% { transform: translateY(0) rotate(var(--rot, -3deg)); }
    50% { transform: translateY(-3px) rotate(var(--rot, -3deg)); }
}

.annotation-1 { --rot: -3deg; }
.annotation-2 { --rot: 2deg; }

/* --- Opening Scene --- */
.opening-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 160px);
    text-align: center;
    gap: 24px;
}

.hud-panel-hero {
    max-width: 720px;
    width: 100%;
}

.opening-sub-panel {
    max-width: 560px;
    width: 100%;
}

/* Loading rings */
.loading-rings {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    pointer-events: none;
    z-index: 8;
    opacity: 0;
    transition: opacity 1s var(--ease-warm);
}

.loading-rings.active {
    opacity: 1;
}

.loading-rings.fade-out {
    opacity: 0;
}

.ring {
    position: absolute;
    top: 50%;
    left: 50%;
    border-radius: 50%;
    border: 1px solid var(--molten-amber);
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
}

.ring-1 {
    width: 80px;
    height: 80px;
    animation: ring-pulse 3s var(--ease-warm) infinite;
    animation-delay: 0s;
}

.ring-2 {
    width: 140px;
    height: 140px;
    border-color: var(--sunset-gold);
    animation: ring-pulse 3s var(--ease-warm) infinite;
    animation-delay: 0.4s;
}

.ring-3 {
    width: 200px;
    height: 200px;
    border-color: var(--terracotta-dusk);
    animation: ring-pulse 3s var(--ease-warm) infinite;
    animation-delay: 0.8s;
}

.ring-4 {
    width: 260px;
    height: 260px;
    border-color: var(--horizon-rose);
    animation: ring-pulse 3s var(--ease-warm) infinite;
    animation-delay: 1.2s;
}

@keyframes ring-pulse {
    0% { transform: translate(-50%, -50%) scale(0); opacity: 0.6; }
    60% { opacity: 0.2; }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 0; }
}

/* --- Identity Scene --- */
.identity-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
    align-items: start;
    min-height: calc(100vh - 160px);
    padding-top: 120px;
    position: relative;
}

.identity-main {
    grid-column: 1;
}

.identity-side {
    grid-column: 2;
}

/* Metrics */
.metric-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.metric-row:last-child {
    margin-bottom: 0;
}

.metric-label {
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--faded-sienna);
    width: 72px;
    flex-shrink: 0;
}

.metric-bar {
    flex: 1;
    height: 4px;
    background: rgba(255, 200, 160, 0.1);
    border-radius: 2px;
    overflow: hidden;
}

.metric-fill {
    display: block;
    height: 100%;
    width: var(--fill);
    background: linear-gradient(90deg, var(--terracotta-dusk), var(--molten-amber));
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 1.2s var(--ease-warm);
}

.metric-fill.animate {
    transform: scaleX(1);
}

.metric-value {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--molten-amber);
    width: 36px;
    text-align: right;
    flex-shrink: 0;
}

/* --- Showcase Scene --- */
.showcase-content {
    padding-top: 100px;
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: auto auto;
    gap: 24px;
}

.showcase-panel {
    opacity: 0;
    transform: translateY(30px);
}

.showcase-panel.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity var(--panel-duration) var(--ease-warm),
                transform var(--panel-duration) var(--ease-warm);
}

.showcase-panel-1.visible { transition-delay: 0ms; }
.showcase-panel-2.visible { transition-delay: 100ms; }
.showcase-panel-3.visible { transition-delay: 200ms; }
.showcase-panel-4.visible { transition-delay: 300ms; }
.showcase-panel-5.visible { transition-delay: 400ms; }
.showcase-panel-6.visible { transition-delay: 500ms; }

/* Showcase panel visuals */
.panel-visual {
    margin-top: 16px;
    padding: 12px 0;
}

/* Gradient swatches */
.visual-gradient {
    display: flex;
    gap: 8px;
}

.gradient-swatch {
    height: 40px;
    flex: 1;
    border-radius: 4px;
}

.swatch-1 {
    background: linear-gradient(135deg, #1A0E08, #3A1830);
}

.swatch-2 {
    background: linear-gradient(135deg, #B85A3A, #E8913A);
}

.swatch-3 {
    background: linear-gradient(135deg, #F4C56C, #E87C6C);
}

/* Type samples */
.visual-type {
    display: flex;
    gap: 16px;
    align-items: baseline;
}

.type-sample {
    font-size: 36px;
    color: var(--parchment-glow);
    opacity: 0.8;
}

.type-grotesk { font-family: var(--font-heading); font-weight: 700; }
.type-mono { font-family: var(--font-mono); }
.type-serif { font-family: var(--font-body); font-style: italic; }
.type-hand { font-family: var(--font-accent); }

/* Mini particles */
.visual-particles {
    position: relative;
    height: 60px;
}

.mini-particle {
    position: absolute;
    left: var(--x);
    top: var(--y);
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--sunset-gold);
    opacity: 0.5;
    animation: mini-drift 6s ease-in-out infinite;
    animation-delay: var(--delay);
}

@keyframes mini-drift {
    0%, 100% { transform: translate(0, 0); opacity: 0.5; }
    50% { transform: translate(8px, -6px); opacity: 0.8; }
}

/* Mini grid */
.visual-grid {
    display: flex;
    gap: 8px;
    height: 50px;
    align-items: stretch;
}

.mini-grid-line {
    flex: 1;
    border-right: 1px solid var(--grid-line-color);
}

.mini-grid-line:last-child {
    border-right: none;
}

/* Palette chips */
.visual-palette {
    display: flex;
    gap: 4px;
}

.palette-chip {
    flex: 1;
    height: 32px;
    background: var(--chip-color);
    border-radius: 3px;
    border: 1px solid rgba(255, 200, 160, 0.1);
}

/* Wash blobs */
.visual-wash {
    position: relative;
    height: 60px;
    overflow: hidden;
    border-radius: 4px;
}

.wash-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(12px);
}

.wash-blob-1 {
    width: 80px;
    height: 60px;
    top: -10px;
    left: 10%;
    background: rgba(232, 124, 108, 0.3);
}

.wash-blob-2 {
    width: 100px;
    height: 70px;
    top: 0;
    left: 40%;
    background: rgba(232, 145, 58, 0.25);
}

.wash-blob-3 {
    width: 70px;
    height: 50px;
    top: 5px;
    left: 70%;
    background: rgba(244, 197, 108, 0.2);
}

/* --- Atmospheric Interlude Scene --- */
.scene-interlude {
    display: flex;
    align-items: center;
    justify-content: center;
}

.interlude-content {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(80vh - 160px);
    text-align: center;
}

.interlude-text {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 36px;
    line-height: 1.5;
    color: var(--parchment-glow);
    max-width: 600px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1.2s var(--ease-warm), transform 1.2s var(--ease-warm);
}

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

/* --- Closing Scene --- */
.closing-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 160px);
    gap: 24px;
    text-align: center;
}

.closing-main {
    max-width: 720px;
    width: 100%;
}

.closing-cta {
    max-width: 400px;
    width: 100%;
}

.cta-text {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 20px;
    color: var(--parchment-glow);
    margin-bottom: 20px;
}

.cta-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 40px;
    border: 1px solid var(--molten-amber);
    border-radius: 4px;
    cursor: pointer;
    overflow: hidden;
    transition: border-color 0.3s var(--ease-warm), box-shadow 0.3s var(--ease-warm);
    clip-path: polygon(6px 0%, 100% 0%, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0% 100%, 0% 6px);
}

.cta-button:hover {
    border-color: var(--sunset-gold);
    box-shadow: inset 0 0 20px rgba(232, 145, 58, 0.15), 0 0 30px rgba(232, 145, 58, 0.1);
}

.cta-button-text {
    font-family: var(--font-mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--molten-amber);
    position: relative;
    z-index: 2;
    transition: color 0.3s var(--ease-warm);
}

.cta-button:hover .cta-button-text {
    color: var(--sunset-gold);
}

.cta-button-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(232, 145, 58, 0.2), transparent 70%);
    transform: translate(-50%, -50%);
    transition: width 0.5s var(--ease-warm), height 0.5s var(--ease-warm);
    z-index: 1;
}

.cta-button:hover .cta-button-glow {
    width: 300px;
    height: 300px;
}

.closing-coordinates {
    display: flex;
    gap: 32px;
    margin-top: 16px;
}

/* --- Scroll Milestones --- */
.scroll-milestone {
    position: relative;
    width: 100%;
    height: 60px;
    z-index: 10;
    overflow: hidden;
}

.milestone-brush {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 4px;
    transform: translateY(-50%) scaleX(0);
    transform-origin: left;
    background: linear-gradient(90deg,
        transparent,
        var(--terracotta-dusk) 10%,
        var(--molten-amber) 30%,
        var(--sunset-gold) 50%,
        var(--horizon-rose) 70%,
        var(--terracotta-dusk) 90%,
        transparent
    );
    border-radius: 2px;
    filter: blur(1px);
    transition: transform 1.5s var(--ease-warm);
}

.scroll-milestone.active .milestone-brush {
    transform: translateY(-50%) scaleX(1);
}

/* --- Ember Trail --- */
.ember-trail {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 800;
}

.ember {
    position: absolute;
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: var(--molten-amber);
    opacity: 0.6;
    pointer-events: none;
    animation: ember-fall 2s var(--ease-warm) forwards;
}

@keyframes ember-fall {
    0% {
        opacity: 0.6;
        transform: translateY(0) scale(1);
    }
    100% {
        opacity: 0;
        transform: translateY(120px) scale(0.3);
    }
}

/* --- Panel animation states --- */
.hud-panel[data-animate="fade-assemble"] {
    opacity: 0;
    transform: translateY(20px) scale(0.97);
}

.hud-panel[data-animate="fade-assemble"].visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    transition: opacity 0.8s var(--ease-warm), transform 0.8s var(--ease-warm);
}

.hud-panel[data-animate="slide-up"] {
    opacity: 0;
    transform: translateY(40px);
}

.hud-panel[data-animate="slide-up"].visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity var(--panel-duration) var(--ease-warm), transform var(--panel-duration) var(--ease-warm);
    transition-delay: 200ms;
}

.hud-panel[data-animate="slide-left"] {
    opacity: 0;
    transform: translateX(-40px);
}

.hud-panel[data-animate="slide-left"].visible {
    opacity: 1;
    transform: translateX(0);
    transition: opacity var(--panel-duration) var(--ease-warm), transform var(--panel-duration) var(--ease-warm);
}

.hud-panel[data-animate="slide-right"] {
    opacity: 0;
    transform: translateX(40px);
}

.hud-panel[data-animate="slide-right"].visible {
    opacity: 1;
    transform: translateX(0);
    transition: opacity var(--panel-duration) var(--ease-warm), transform var(--panel-duration) var(--ease-warm);
    transition-delay: 150ms;
}

.hud-panel[data-animate="reassemble"] {
    opacity: 0;
    transform: translateY(-30px) scale(0.95);
}

.hud-panel[data-animate="reassemble"].visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    transition: opacity 0.8s var(--ease-warm), transform 0.8s var(--ease-warm);
}

/* --- Scroll milestone entry burst --- */
.hud-panel .entry-burst {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(232, 145, 58, 0.15), transparent 70%);
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: -1;
}

.hud-panel.visible .entry-burst {
    animation: entry-burst 0.8s var(--ease-warm) forwards;
}

@keyframes entry-burst {
    0% { width: 0; height: 0; opacity: 1; }
    100% { width: 400px; height: 400px; opacity: 0; }
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .hero-title {
        font-size: 42px;
    }

    .section-title {
        font-size: 32px;
    }

    .identity-content {
        grid-template-columns: 1fr;
    }

    .identity-side {
        grid-column: 1;
    }

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

    .nav-links {
        display: none;
    }

    .interlude-text {
        font-size: 24px;
        padding: 0 16px;
    }

    .annotation {
        display: none;
    }

    .closing-coordinates {
        flex-direction: column;
        gap: 8px;
    }

    .scene-content {
        padding: 60px 16px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }

    .section-title {
        font-size: 26px;
    }

    .hud-panel-inner {
        padding: 20px;
    }
}