/* ============================================================
   musical.quest — Neon Electric Timeline
   ============================================================ */

:root {
    /* --- Color palette (DESIGN.md) --- */
    --bg-primary:    #0D0D1A;
    --bg-secondary:  #1A1A3E;
    --bg-tertiary:   #2A2A4E;
    --bg-rule:       #2A2A3E;
    --bg-deep:       #1A0033;

    --neon-magenta:  #FF2D95;
    --neon-cyan:     #00E5FF;
    --warm-amber:    #FFD700;
    --sunset-coral:  #FF6B4A;

    --text-primary:   #E8E0F0;
    --text-secondary: #B8B0C8;

    --glow-magenta: rgba(255, 45, 149, 0.40);
    --glow-cyan:    rgba(0, 229, 255, 0.40);
    --glow-amber:   rgba(255, 215, 0, 0.35);

    /* --- Music time-signature spacing --- */
    --eighth: 8px;
    --quarter: 16px;
    --half: 32px;
    --measure: 64px;
    --two-measure: 128px;
    --four-measure: 256px;
    --eight-measure: 512px;

    /* --- Type --- */
    --font-display: 'Bebas Neue', 'Oswald', 'Inter', system-ui, sans-serif;
    --font-secondary: 'Oswald', 'Inter', sans-serif;
    --font-body: 'Nunito Sans', 'Inter', sans-serif;
    --font-mono: 'Share Tech Mono', 'Inter', monospace;

    /* --- Animation --- */
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

    --spine-color: var(--neon-magenta);
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.72;
    overflow-x: hidden;
}

body {
    /* Layered diagonal hatching + dot grid texture */
    background-color: var(--bg-primary);
    background-image:
        repeating-linear-gradient(
            45deg,
            rgba(42, 42, 78, 0.18) 0,
            rgba(42, 42, 78, 0.18) 1px,
            transparent 1px,
            transparent 14px
        ),
        radial-gradient(circle at 18% 28%, rgba(255, 45, 149, 0.08), transparent 38%),
        radial-gradient(circle at 82% 72%, rgba(0, 229, 255, 0.06), transparent 42%);
    min-height: 100vh;
    position: relative;
}

/* ============================================================
   Background ghost letters
   ============================================================ */
.bg-ghosts {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.ghost-letter {
    position: absolute;
    font-family: var(--font-display);
    color: var(--neon-magenta);
    opacity: 0.06;
    font-size: 520px;
    line-height: 0.85;
    letter-spacing: 0.04em;
    user-select: none;
}

.ghost-letter.g1 { top: 8vh;   left: -3vw;  color: var(--neon-magenta); }
.ghost-letter.g2 { top: 32vh;  right: -2vw; color: var(--neon-cyan);    opacity: 0.05; }
.ghost-letter.g3 { top: 60vh;  left: 2vw;   color: var(--warm-amber);   opacity: 0.05; font-size: 460px; }
.ghost-letter.g4 { top: 92vh;  right: 1vw;  color: var(--neon-magenta); opacity: 0.05; font-size: 480px; }
.ghost-letter.g5 { top: 130vh; left: -2vw;  color: var(--sunset-coral); opacity: 0.06; font-size: 520px; }
.ghost-letter.g6 { top: 168vh; right: -3vw; color: var(--neon-cyan);    opacity: 0.05; }

/* ============================================================
   Vinyl groove watermarks
   ============================================================ */
.vinyl-watermarks {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}
.vinyl-grooves {
    position: absolute;
    width: 600px;
    height: 600px;
    opacity: 0.5;
}
.vinyl-grooves.vw1 { top: 22vh; left: -200px;  animation: spin 60s linear infinite; }
.vinyl-grooves.vw2 { top: 110vh; right: -240px; animation: spin 90s linear infinite reverse; }

@keyframes spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
    position: relative;
    z-index: 2;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--four-measure) var(--two-measure);
    overflow: hidden;
    background:
        radial-gradient(ellipse at 50% 0%, rgba(255, 45, 149, 0.10), transparent 55%),
        linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-primary) 100%);
    animation: heroPulse 9s ease-in-out infinite alternate;
}

@keyframes heroPulse {
    0%   { background-position: 0% 0%, 0% 0%; }
    100% { background-position: 100% 50%, 0% 0%; }
}

.hero-inner {
    text-align: center;
    max-width: 1100px;
    width: 100%;
    position: relative;
    z-index: 3;
}

.hero-meta {
    font-family: var(--font-mono);
    color: var(--neon-cyan);
    letter-spacing: 0.18em;
    font-size: 13px;
    text-transform: uppercase;
    margin: 0 0 var(--measure) 0;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-shadow: 0 0 8px var(--glow-cyan);
}

.meta-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--neon-magenta);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--neon-magenta);
    animation: blink 1.6s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.25; }
}

.hero-title {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(64px, 13vw, 168px);
    line-height: 0.92;
    letter-spacing: 0.12em;
    margin: 0;
    color: var(--neon-magenta);
    text-shadow:
        0 0 7px currentColor,
        0 0 18px currentColor,
        0 0 36px var(--neon-magenta),
        0 0 72px var(--glow-magenta);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.04em;
    animation: neonFlicker 3s ease-in-out infinite;
}

.hero-title .word {
    display: inline-flex;
    perspective: 800px;
}

.hero-title .char {
    display: inline-block;
    transform: perspective(800px) rotateY(-90deg);
    opacity: 0;
    animation: charDrop 0.8s var(--ease-out) forwards;
}

.hero-title .dot-sep {
    display: inline-block;
    color: var(--neon-cyan);
    text-shadow:
        0 0 7px currentColor,
        0 0 18px currentColor,
        0 0 36px var(--neon-cyan),
        0 0 72px var(--glow-cyan);
    margin: 0 0.12em;
    transform: scale(0.85) translateY(-0.12em);
    animation: dotPulse 2s ease-in-out infinite;
}

@keyframes charDrop {
    to {
        transform: perspective(800px) rotateY(0deg);
        opacity: 1;
    }
}

@keyframes neonFlicker {
    0%, 92%, 100% {
        text-shadow:
            0 0 7px currentColor,
            0 0 18px currentColor,
            0 0 36px var(--neon-magenta),
            0 0 72px var(--glow-magenta);
    }
    93%, 95% {
        text-shadow:
            0 0 4px currentColor,
            0 0 9px currentColor,
            0 0 18px var(--neon-magenta);
        opacity: 0.92;
    }
    94% { opacity: 0.78; }
}

@keyframes dotPulse {
    0%, 100% { transform: scale(0.85) translateY(-0.12em); opacity: 1; }
    50%      { transform: scale(1.0)  translateY(-0.12em); opacity: 0.85; }
}

.hero-tagline {
    font-family: var(--font-secondary);
    font-weight: 500;
    color: var(--warm-amber);
    font-size: clamp(18px, 2.4vw, 28px);
    letter-spacing: 0.04em;
    margin: var(--measure) auto 0;
    max-width: 720px;
    text-shadow: 0 0 12px var(--glow-amber);
}

.hero-waveform {
    margin: var(--two-measure) auto 0;
    width: clamp(280px, 60vw, 720px);
    height: 80px;
    opacity: 0.92;
}

.hero-waveform svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 6px rgba(255, 45, 149, 0.35));
}

.wbar {
    transform-origin: center;
    animation: wave-pulse 2.4s ease-in-out infinite;
}
.wbar:nth-child(odd)  { animation-delay: 0.1s; }
.wbar:nth-child(3n)   { animation-delay: 0.3s; }
.wbar:nth-child(5n)   { animation-delay: 0.55s; }
.wbar:nth-child(7n)   { animation-delay: 0.8s; }

@keyframes wave-pulse {
    0%, 100% { transform: scaleY(1); }
    50%      { transform: scaleY(1.18); }
}

.hero-scroll {
    margin-top: var(--two-measure);
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: var(--quarter);
    color: var(--neon-cyan);
}

.scroll-label {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    text-shadow: 0 0 6px var(--glow-cyan);
}

.scroll-arrow {
    font-family: var(--font-display);
    font-size: 32px;
    animation: arrowBounce 2s ease-in-out infinite;
    text-shadow: 0 0 8px var(--glow-cyan);
}

@keyframes arrowBounce {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(8px); }
}

/* ============================================================
   TIMELINE
   ============================================================ */
.timeline {
    position: relative;
    z-index: 2;
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--four-measure) var(--two-measure) var(--four-measure);
}

/* Central spine */
.spine {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 3px;
    transform: translateX(-50%);
    background: linear-gradient(
        to bottom,
        var(--neon-magenta) 0%,
        var(--neon-magenta) 30%,
        var(--sunset-coral) 60%,
        var(--neon-cyan) 100%
    );
    box-shadow:
        0 0 12px var(--neon-magenta),
        0 0 24px var(--glow-magenta);
    animation: spinePulse 3s ease-in-out infinite;
    pointer-events: none;
}

.spine::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--neon-magenta);
    box-shadow: 0 0 16px var(--neon-magenta), 0 0 32px var(--glow-magenta);
}

@keyframes spinePulse {
    0%, 100% { box-shadow: 0 0 8px var(--neon-magenta),  0 0 18px var(--glow-magenta); }
    50%      { box-shadow: 0 0 16px var(--neon-magenta), 0 0 36px var(--glow-magenta); }
}

/* ===== Event ===== */
.event {
    position: relative;
    width: 50%;
    min-height: 70vh;
    margin-top: var(--gap, var(--two-measure));
    padding: 0 var(--two-measure) 0 0;
    display: flex;
    align-items: center;
}

.event:first-of-type {
    margin-top: var(--measure);
}

.event.left {
    margin-right: 50%;
    justify-content: flex-end;
    padding: 0 calc(var(--two-measure) + 24px) 0 0;
}

.event.right {
    margin-left: 50%;
    justify-content: flex-start;
    padding: 0 0 0 calc(var(--two-measure) + 24px);
}

/* Connecting node dot on the spine */
.event-node {
    position: absolute;
    top: 50%;
    width: 32px;
    height: 32px;
    transform: translate(-50%, -50%) scale(0);
    transition: transform 0.5s var(--ease-spring);
    pointer-events: none;
}

.event.left  .event-node { right: calc(var(--two-measure) - 16px); left: auto; }
.event.right .event-node { left: calc(var(--two-measure) - 16px); }

.event.in-view .event-node {
    transform: translate(-50%, -50%) scale(1);
}

.node-dot {
    position: absolute;
    inset: 0;
    margin: auto;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--neon-magenta);
    box-shadow:
        0 0 8px var(--neon-magenta),
        0 0 18px var(--glow-magenta);
    z-index: 2;
    transition: width 0.3s var(--ease-spring), height 0.3s var(--ease-spring);
}

.node-vinyl {
    position: absolute;
    inset: 0;
    margin: auto;
    width: 32px;
    height: 32px;
    opacity: 0;
    transform: scale(0.4);
    transition: opacity 0.3s ease, transform 0.4s var(--ease-spring);
    animation: spin 8s linear infinite;
    z-index: 1;
}

.node-vinyl svg { width: 100%; height: 100%; }

/* sound-wave radiating burst on hover */
.event.is-hover .node-dot {
    width: 22px;
    height: 22px;
    box-shadow:
        0 0 10px var(--neon-magenta),
        0 0 28px var(--glow-magenta),
        0 0 0 6px rgba(255, 45, 149, 0.16),
        0 0 0 14px rgba(255, 45, 149, 0.08);
}

.event.is-hover .node-vinyl {
    opacity: 1;
    transform: scale(1.6);
}

/* Connecting bar from spine to card */
.event-bar {
    position: absolute;
    top: 50%;
    height: 2px;
    width: 48px;
    background: linear-gradient(
        to right,
        var(--neon-magenta) 0%,
        var(--sunset-coral) 60%,
        var(--warm-amber) 100%
    );
    box-shadow: 0 0 8px var(--glow-magenta);
    transform: translateY(-50%);
    clip-path: inset(0 100% 0 0);
    transition: clip-path 0.6s var(--ease-out) 0.15s;
    pointer-events: none;
}

.event.left  .event-bar { right: var(--two-measure); }
.event.right .event-bar { left: var(--two-measure); transform: translateY(-50%) scaleX(-1); }

.event.in-view .event-bar { clip-path: inset(0 0 0 0); }

/* Card */
.event-card {
    position: relative;
    width: min(480px, 100%);
    padding: var(--measure) calc(var(--measure) - 8px);
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: 6px;
    transform-style: preserve-3d;
    transform: perspective(800px) rotateY(0deg) rotateX(0deg) translateY(40px);
    opacity: 0;
    transition:
        transform 0.5s var(--ease-out) 0.25s,
        opacity 0.5s ease 0.25s,
        box-shadow 0.3s ease;
    background-image:
        repeating-linear-gradient(
            45deg,
            transparent 0,
            transparent 12px,
            rgba(42, 42, 78, 0.18) 12px,
            rgba(42, 42, 78, 0.18) 13px
        );
    box-shadow:
        0 4px 14px rgba(0, 0, 0, 0.6),
        0 0 0 1px rgba(42, 42, 78, 0.6),
        inset 0 0 24px rgba(13, 13, 26, 0.6);
}

.event.left  .event-card { transform: perspective(800px) rotateY(0deg) rotateX(0deg) translateY(40px) translateX(-20px); }
.event.right .event-card { transform: perspective(800px) rotateY(0deg) rotateX(0deg) translateY(40px) translateX(20px); }

.event.in-view.left  .event-card,
.event.in-view.right .event-card {
    opacity: 1;
}

.event.in-view.left .event-card {
    transform: perspective(800px) rotateY(3deg) rotateX(1deg) translateY(0) translateX(0);
}

.event.in-view.right .event-card {
    transform: perspective(800px) rotateY(-3deg) rotateX(1deg) translateY(0) translateX(0);
}

.event.in-view:nth-child(4n+1) .event-card { transform: perspective(800px) rotateY(3deg)  rotateX(-1deg); }
.event.in-view:nth-child(4n+2) .event-card { transform: perspective(800px) rotateY(-2deg) rotateX(2deg); }
.event.in-view:nth-child(4n+3) .event-card { transform: perspective(800px) rotateY(-3deg) rotateX(1deg); }
.event.in-view:nth-child(4n+4) .event-card { transform: perspective(800px) rotateY(2deg)  rotateX(-2deg); }

.event.is-hover .event-card {
    box-shadow:
        0 8px 22px rgba(0, 0, 0, 0.7),
        0 0 0 1px var(--neon-magenta),
        0 0 24px var(--glow-magenta),
        inset 0 0 24px rgba(255, 45, 149, 0.10);
    border-color: var(--neon-magenta);
}

.event.right.is-hover .event-card {
    box-shadow:
        0 8px 22px rgba(0, 0, 0, 0.7),
        0 0 0 1px var(--neon-cyan),
        0 0 24px var(--glow-cyan),
        inset 0 0 24px rgba(0, 229, 255, 0.10);
    border-color: var(--neon-cyan);
}

.event.in-view .event-card .card-illus,
.event.in-view .event-card .card-stamp,
.event.in-view .event-card .card-title,
.event.in-view .event-card .card-body,
.event.in-view .event-card .card-tags {
    animation: fadeUp 0.5s ease-out forwards 0.4s;
}

.card-illus  { animation-delay: 0.40s; }
.card-stamp  { animation-delay: 0.48s; }
.card-title  { animation-delay: 0.56s; }
.card-body   { animation-delay: 0.64s; }
.card-tags   { animation-delay: 0.72s; }

.event-card .card-illus,
.event-card .card-stamp,
.event-card .card-title,
.event-card .card-body,
.event-card .card-tags {
    opacity: 0;
    transform: translateY(8px);
}

@keyframes fadeUp {
    to { opacity: 1; transform: translateY(0); }
}

.card-illus {
    margin: 0 0 var(--measure) 0;
    border-radius: 4px;
    overflow: hidden;
    background: var(--bg-deep);
}

.illus-svg {
    display: block;
    width: 100%;
    height: auto;
    filter: drop-shadow(0 0 6px rgba(255, 45, 149, 0.18));
}

.card-stamp {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.18em;
    color: var(--neon-cyan);
    text-shadow: 0 0 6px var(--glow-cyan);
    margin: 0 0 12px;
    text-transform: uppercase;
}

.card-title {
    font-family: var(--font-secondary);
    font-weight: 500;
    color: var(--warm-amber);
    font-size: clamp(28px, 3.4vw, 40px);
    letter-spacing: 0.04em;
    line-height: 1.05;
    margin: 0 0 var(--quarter);
    text-shadow: 0 0 10px var(--glow-amber);
}

.card-body {
    color: var(--text-primary);
    font-size: 16px;
    line-height: 1.72;
    margin: 0 0 var(--measure);
}

.card-tags {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.card-tags li {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    color: var(--text-secondary);
    text-transform: uppercase;
    background: var(--bg-tertiary);
    padding: 4px 10px;
    border: 1px solid var(--bg-tertiary);
    border-radius: 2px;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.event.is-hover .card-tags li {
    color: var(--neon-cyan);
    border-color: var(--neon-cyan);
}

/* ============================================================
   Closing burst
   ============================================================ */
.closing {
    position: relative;
    width: 100%;
    margin-top: var(--four-measure);
    padding: var(--four-measure) var(--two-measure) var(--two-measure);
    text-align: center;
    z-index: 2;
}

.burst {
    width: clamp(220px, 30vw, 360px);
    height: clamp(220px, 30vw, 360px);
    margin: 0 auto var(--measure);
    position: relative;
    animation: burstPulse 4s ease-in-out infinite;
    filter: drop-shadow(0 0 16px var(--glow-cyan));
}

.burst svg { width: 100%; height: 100%; }

.burst-rays line {
    animation: rayShimmer 2.4s ease-in-out infinite;
    transform-origin: 0 0;
}

@keyframes burstPulse {
    0%, 100% { transform: scale(1); }
    50%      { transform: scale(1.04); }
}

@keyframes rayShimmer {
    0%, 100% { stroke-opacity: 0.7; }
    50%      { stroke-opacity: 1; }
}

.closing-infinity {
    font-family: var(--font-display);
    color: var(--neon-cyan);
    font-size: clamp(80px, 14vw, 180px);
    line-height: 0.9;
    margin: 0;
    text-shadow:
        0 0 7px currentColor,
        0 0 18px currentColor,
        0 0 36px var(--neon-cyan),
        0 0 72px var(--glow-cyan);
    animation: dotPulse 3s ease-in-out infinite;
}

.closing-title {
    font-family: var(--font-display);
    font-weight: 400;
    color: var(--neon-magenta);
    font-size: clamp(40px, 6vw, 76px);
    letter-spacing: 0.12em;
    margin: var(--quarter) 0 var(--measure);
    text-shadow:
        0 0 7px currentColor,
        0 0 18px currentColor,
        0 0 36px var(--neon-magenta),
        0 0 72px var(--glow-magenta);
}

.closing-text {
    color: var(--text-primary);
    font-size: 18px;
    max-width: 640px;
    margin: 0 auto var(--two-measure);
}

.closing-stamp {
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 0.22em;
    color: var(--neon-cyan);
    text-shadow: 0 0 8px var(--glow-cyan);
    text-transform: uppercase;
    margin: 0;
}

/* ============================================================
   Footer
   ============================================================ */
.page-footer {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--two-measure) var(--two-measure) var(--four-measure);
    border-top: 1px dashed #2A2A3E;
    color: var(--text-secondary);
    background-image: repeating-linear-gradient(
        0deg,
        transparent 0,
        transparent 23px,
        #2A2A3E 23px,
        #2A2A3E 24px
    );
}

.foot-line {
    font-family: var(--font-secondary);
    font-weight: 500;
    color: var(--warm-amber);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 14px;
    margin: 0 0 8px;
}

.foot-coords {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.18em;
    color: var(--neon-cyan);
    margin: 0;
    text-shadow: 0 0 6px var(--glow-cyan);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
    .timeline { padding: var(--four-measure) var(--measure); }
    .event { width: 100%; min-height: auto; }
    .event.left,
    .event.right {
        margin: var(--two-measure) 0 0 0;
        padding: 0 0 0 var(--measure);
        justify-content: flex-start;
    }
    .spine { left: 24px; transform: none; }
    .event.left  .event-node,
    .event.right .event-node { left: 24px; right: auto; transform: translate(-50%, -50%) scale(0); }
    .event.in-view.left  .event-node,
    .event.in-view.right .event-node { transform: translate(-50%, -50%) scale(1); }
    .event.left  .event-bar,
    .event.right .event-bar { left: 24px; right: auto; transform: translateY(-50%); }
    .event-card { width: 100%; }
}

@media (max-width: 540px) {
    body { font-size: 16px; }
    .hero { padding: var(--two-measure) var(--measure); }
    .hero-tagline { font-size: 16px; }
    .hero-title { font-size: clamp(56px, 16vw, 96px); }
    .ghost-letter { font-size: 320px; }
    .timeline { padding: var(--two-measure) var(--half); }
    .event-card { padding: var(--measure) var(--half); }
}