:root {
    --ink: #0a0c10;
    --ink-track: #1a1d24;
    --cyan: #3ee8ff;
    --cyan-dim: rgba(62, 232, 255, 0.45);
    --cyan-glow: rgba(62, 232, 255, 0.28);
    --orange: #ff8a1a;
    --orange-hot: #ffb347;
    --orange-glow: rgba(255, 138, 26, 0.35);
    --gold: #f0c43a;
    --hazard: #ff3a48;
    --text: #eef2f6;
    --text-muted: #9aa6b4;
    --text-dim: #5e6a78;
    --border: rgba(62, 232, 255, 0.16);
    --font-display: 'Space Grotesk', sans-serif;
    --font-mono: 'Space Mono', 'SFMono-Regular', Consolas, monospace;
    --font-pixel: 'VT323', monospace;
    --font-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.25, 1, 0.5, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body.slipframe-page {
    font-family: var(--font-sans);
    background: var(--ink);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ================================
   SCROLL PROGRESS
================================ */
.scroll-progress {
    position: fixed;
    top: 0; left: 0;
    height: 2px;
    width: 0%;
    background: linear-gradient(90deg, var(--cyan), var(--orange));
    z-index: 9999;
    transition: width 0.1s linear;
    box-shadow: 0 0 12px var(--cyan-glow);
}

/* ================================
   NAV
================================ */
nav {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    padding: 1.25rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    background: rgba(10, 12, 16, 0.5);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(62, 232, 255, 0.08);
    transition: padding 0.3s var(--ease-out), background 0.3s;
}

nav.scrolled {
    padding: 1rem 3rem;
    background: rgba(10, 12, 16, 0.88);
    border-bottom-color: rgba(62, 232, 255, 0.14);
}

.nav-logo {
    font-family: var(--font-pixel);
    font-size: 2rem;
    color: var(--cyan);
    letter-spacing: 0.05em;
    text-decoration: none;
    text-shadow: 0 0 20px var(--cyan-glow);
}

.nav-links { display: flex; gap: 2.5rem; }

nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: color 0.2s ease;
    position: relative;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 0;
    width: 0; height: 1px;
    background: linear-gradient(90deg, var(--cyan), var(--orange));
    transition: width 0.3s var(--ease-spring);
}

nav a:hover { color: var(--text); }
nav a:hover::after { width: 100%; }

.nav-num {
    color: var(--cyan);
    margin-right: 0.3em;
}

/* ================================
   HERO — CSS recreation of the run
================================ */
.sf-hero {
    position: relative;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: flex-end;
    padding: 0 3rem 11vh;
    overflow: hidden;
}

.sf-atmosphere {
    position: absolute;
    inset: 0;
    z-index: 0;
    background:
        radial-gradient(ellipse 70% 50% at 70% 20%, rgba(40, 48, 62, 0.45) 0%, transparent 55%),
        radial-gradient(ellipse 50% 40% at 15% 70%, rgba(30, 36, 48, 0.5) 0%, transparent 50%),
        linear-gradient(180deg, #12161e 0%, #0c1016 40%, var(--ink) 100%);
    will-change: transform;
}

/* Soft ambient “room” wash behind the track */
.sf-room-glow {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 55% 40% at 50% 35%, rgba(62, 232, 255, 0.06) 0%, transparent 60%),
        radial-gradient(ellipse 40% 30% at 50% 30%, rgba(255, 138, 26, 0.05) 0%, transparent 55%);
    pointer-events: none;
}

.sf-corridor {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    perspective: 900px;
    will-change: transform;
}

/* Ink track plane */
.sf-track {
    position: absolute;
    width: min(92vw, 980px);
    height: 130%;
    bottom: -28%;
    transform: rotateX(62deg);
    transform-origin: center bottom;
    background:
        linear-gradient(180deg, rgba(26, 29, 36, 0.15) 0%, var(--ink-track) 18%, #151820 100%);
    border-radius: 4px;
    box-shadow:
        0 0 80px rgba(0, 0, 0, 0.6),
        inset 0 0 60px rgba(0, 0, 0, 0.45);
    overflow: hidden;
}

.sf-track::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        transparent 32%,
        rgba(255, 255, 255, 0.015) 33%,
        transparent 34%,
        transparent 66%,
        rgba(255, 255, 255, 0.015) 67%,
        transparent 68%,
        transparent 100%
    );
    pointer-events: none;
}

/* Dual rails: cyan outer + orange core (matches game lane lights) */
.sf-lane-set {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 10px;
    display: flex;
    justify-content: space-between;
    animation: lane-pulse 3.6s ease-in-out infinite;
}

.sf-lane-set--l { left: 33%; }
.sf-lane-set--r { left: 66%; transform: translateX(-100%); }

.sf-rail {
    display: block;
    width: 3px;
    height: 100%;
    border-radius: 2px;
    background:
        linear-gradient(180deg, transparent 0%, var(--cyan) 12%, var(--cyan) 88%, transparent 100%);
    box-shadow:
        0 0 8px var(--cyan),
        0 0 18px var(--cyan-glow),
        inset 0 0 0 1px rgba(255, 138, 26, 0.85);
    position: relative;
}

.sf-rail::after {
    content: '';
    position: absolute;
    inset: 0 1px;
    background: linear-gradient(180deg, transparent, var(--orange) 20%, var(--orange-hot) 50%, var(--orange) 80%, transparent);
    opacity: 0.95;
    border-radius: 1px;
}

@keyframes lane-pulse {
    0%, 100% { opacity: 0.65; filter: brightness(0.92); }
    50% { opacity: 1; filter: brightness(1.2); }
}

/* Orange rounded-rect portal + cyan tunnel rings */
.sf-portal {
    position: absolute;
    top: 16%;
    left: 50%;
    transform: translateX(-50%);
    width: min(36vw, 340px);
    aspect-ratio: 1.25 / 1;
    z-index: 2;
}

.sf-portal-rim {
    position: absolute;
    inset: 0;
    border-radius: 22%;
    border: 7px solid var(--orange);
    box-shadow:
        0 0 0 2px rgba(0, 0, 0, 0.45),
        0 0 28px var(--orange-glow),
        0 0 60px rgba(255, 138, 26, 0.2),
        inset 0 0 24px rgba(255, 138, 26, 0.25);
    animation: rim-pulse 4.2s ease-in-out infinite;
    background: rgba(4, 8, 14, 0.55);
}

@keyframes rim-pulse {
    0%, 100% {
        box-shadow:
            0 0 0 2px rgba(0, 0, 0, 0.45),
            0 0 22px rgba(255, 138, 26, 0.22),
            0 0 48px rgba(255, 138, 26, 0.12),
            inset 0 0 18px rgba(255, 138, 26, 0.18);
    }
    50% {
        box-shadow:
            0 0 0 2px rgba(0, 0, 0, 0.45),
            0 0 36px rgba(255, 138, 26, 0.45),
            0 0 80px rgba(255, 138, 26, 0.28),
            inset 0 0 28px rgba(255, 138, 26, 0.35);
    }
}

.sf-tunnel {
    position: absolute;
    inset: 8%;
    border-radius: 20%;
    overflow: hidden;
    background: radial-gradient(circle at 50% 50%, #061018 0%, #020508 70%);
}

.sf-tunnel span {
    position: absolute;
    inset: 0;
    border-radius: 18%;
    border: 2px solid rgba(62, 232, 255, 0.55);
    box-shadow: 0 0 12px rgba(62, 232, 255, 0.25);
    animation: tunnel-rush 5.5s linear infinite;
    opacity: 0;
}

.sf-tunnel span:nth-child(1) { animation-delay: 0s; }
.sf-tunnel span:nth-child(2) { animation-delay: 1.1s; }
.sf-tunnel span:nth-child(3) { animation-delay: 2.2s; }
.sf-tunnel span:nth-child(4) { animation-delay: 3.3s; }
.sf-tunnel span:nth-child(5) { animation-delay: 4.4s; }

@keyframes tunnel-rush {
    0% {
        inset: 42%;
        opacity: 0;
        border-color: rgba(62, 232, 255, 0.15);
    }
    15% { opacity: 0.9; }
    100% {
        inset: -4%;
        opacity: 0;
        border-color: rgba(62, 232, 255, 0.65);
    }
}

/* Translucent red hazard walls */
.sf-wall {
    position: absolute;
    z-index: 3;
    width: min(7vw, 64px);
    background: linear-gradient(
        180deg,
        rgba(255, 58, 72, 0.15) 0%,
        rgba(255, 58, 72, 0.45) 30%,
        rgba(255, 58, 72, 0.55) 70%,
        rgba(255, 58, 72, 0.2) 100%
    );
    border: 1px solid rgba(255, 90, 100, 0.65);
    box-shadow:
        0 0 20px rgba(255, 58, 72, 0.35),
        inset 0 0 24px rgba(255, 120, 130, 0.25);
    backdrop-filter: blur(1px);
}

.sf-wall--near {
    height: min(38vh, 320px);
    left: calc(50% - min(28vw, 260px));
    bottom: 22%;
    transform: perspective(500px) rotateY(12deg) rotateX(4deg);
}

.sf-wall--far {
    height: min(28vh, 230px);
    left: calc(50% + min(10vw, 90px));
    bottom: 38%;
    width: min(5.5vw, 48px);
    opacity: 0.85;
    transform: perspective(500px) rotateY(-8deg);
}

/* Gold collectible */
.sf-coin {
    position: absolute;
    z-index: 4;
    width: 22px;
    height: 22px;
    left: calc(50% + min(16vw, 150px));
    bottom: 34%;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 30%, #ffe9a0, var(--gold) 45%, #b8861a 100%);
    box-shadow:
        0 0 16px rgba(240, 196, 58, 0.75),
        0 0 36px rgba(240, 196, 58, 0.35);
    animation: coin-drift 6.5s ease-in-out infinite;
}

.sf-coin::after {
    content: '';
    position: absolute;
    inset: 4px;
    border-radius: 50%;
    border: 1.5px solid rgba(255, 255, 255, 0.35);
}

@keyframes coin-drift {
    0%, 100% { transform: translateY(0) scale(1); opacity: 0.85; }
    50% { transform: translateY(-14px) scale(1.08); opacity: 1; }
}

.sf-vignette {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 70% 65% at 55% 40%, transparent 30%, rgba(0, 0, 0, 0.62) 100%);
    pointer-events: none;
    z-index: 5;
}

.sf-haze {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 45%, rgba(10, 12, 16, 0.7) 82%, var(--ink) 100%);
    pointer-events: none;
    z-index: 5;
}

.sf-hero-copy {
    position: relative;
    z-index: 6;
    max-width: 720px;
}

.sf-wordmark {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(3.75rem, 14vw, 7.5rem);
    line-height: 0.95;
    letter-spacing: -0.04em;
    color: var(--text);
    text-shadow:
        0 0 40px rgba(62, 232, 255, 0.28),
        0 0 70px rgba(255, 138, 26, 0.12),
        0 2px 20px rgba(0, 0, 0, 0.55);
    margin-bottom: 1.25rem;
}

.sf-tagline {
    font-family: var(--font-sans);
    font-size: clamp(1.05rem, 2.4vw, 1.35rem);
    font-weight: 500;
    color: var(--text-muted);
    max-width: 28ch;
    line-height: 1.45;
    letter-spacing: -0.01em;
}

.sf-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    margin-top: 2.25rem;
    align-items: center;
}

.btn-store,
.btn-support {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.875rem 1.65rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.3s var(--ease-spring);
}

.btn-store {
    background: rgba(255, 138, 26, 0.14);
    color: var(--orange);
    border: 1px solid rgba(255, 138, 26, 0.4);
    cursor: default;
    user-select: none;
}

.btn-soon {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-dim);
    border: 1px solid rgba(158, 166, 180, 0.3);
    padding: 0.15rem 0.45rem;
    border-radius: 3px;
}

.btn-support {
    color: var(--text);
    border: 1px solid var(--border);
    background: rgba(18, 22, 30, 0.65);
    backdrop-filter: blur(8px);
}

.btn-support:hover {
    border-color: var(--cyan-dim);
    background: rgba(62, 232, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 24px rgba(62, 232, 255, 0.14);
}

.btn-support .arrow {
    display: inline-block;
    transition: transform 0.3s var(--ease-spring);
}

.btn-support:hover .arrow { transform: translateY(3px); }

/* ================================
   SECTIONS
================================ */
.sf-main {
    position: relative;
    z-index: 2;
    background: var(--ink);
}

.sf-section {
    padding: 7rem 3rem;
    border-top: 1px solid rgba(62, 232, 255, 0.06);
}

.sf-section--sparse { padding: 5rem 3rem; }

.sf-section--support {
    padding: 7rem 3rem 8rem;
    background:
        radial-gradient(ellipse 50% 60% at 15% 80%, rgba(62, 232, 255, 0.06) 0%, transparent 60%),
        radial-gradient(ellipse 40% 50% at 90% 20%, rgba(255, 138, 26, 0.05) 0%, transparent 55%),
        var(--ink);
}

.sf-section-row {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(220px, 340px);
    gap: 3rem 4rem;
    align-items: center;
}

.sf-section-inner {
    max-width: 560px;
    margin: 0;
}

.mono-tag {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--cyan);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 1rem;
    display: block;
}

.sf-section h2 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    letter-spacing: -0.03em;
    margin-bottom: 1.15rem;
    color: var(--text);
}

.sf-section p {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.8;
    max-width: 52ch;
}

.sf-req-list {
    list-style: none;
    margin: 1.75rem 0 0;
    padding: 0;
    max-width: 420px;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.sf-req-list li {
    display: grid;
    grid-template-columns: 6.5rem 1fr;
    gap: 1rem;
    align-items: baseline;
    padding: 0.95rem 0;
    border-top: 1px solid rgba(62, 232, 255, 0.1);
}

.sf-req-list li:last-child {
    border-bottom: 1px solid rgba(62, 232, 255, 0.1);
}

.sf-req-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--orange);
}

.sf-req-value {
    font-size: 1.05rem;
    color: var(--text);
    letter-spacing: -0.01em;
    line-height: 1.4;
}

.sf-email {
    display: inline-block;
    margin-top: 2rem;
    font-family: var(--font-mono);
    font-size: clamp(1.1rem, 3vw, 1.45rem);
    color: var(--cyan);
    text-decoration: none;
    letter-spacing: 0.02em;
    border-bottom: 1px solid rgba(62, 232, 255, 0.35);
    padding-bottom: 0.15rem;
    transition: color 0.2s, border-color 0.2s, text-shadow 0.2s;
}

.sf-email:hover {
    color: #7cf0ff;
    border-bottom-color: var(--cyan);
    text-shadow: 0 0 24px var(--cyan-glow);
}

.sf-email-hint {
    margin-top: 1.25rem !important;
    font-size: 0.9rem !important;
    color: var(--text-dim) !important;
    max-width: 42ch;
}

/* ================================
   SECTION VISUALS (right column)
================================ */
.sf-viz {
    justify-self: end;
    width: 100%;
}

.viz-stage {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    max-width: 300px;
    margin-left: auto;
    overflow: hidden;
}

/* —— How it plays: portal stream, one wall at a time —— */
.viz-play {
    background:
        radial-gradient(ellipse 60% 50% at 50% 45%, rgba(62, 232, 255, 0.06) 0%, transparent 65%),
        linear-gradient(180deg, #0e1218 0%, #080a0e 100%);
    border-radius: 12px;
}

.viz-play-track {
    position: absolute;
    left: 18%;
    right: 18%;
    top: 28%;
    bottom: 10%;
    background: linear-gradient(180deg, rgba(26, 29, 36, 0.35) 0%, rgba(20, 24, 32, 0.75) 100%);
    clip-path: polygon(32% 0, 68% 0, 100% 100%, 0 100%);
    opacity: 0.9;
}

.viz-play-rail {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, transparent 0%, var(--cyan) 18%, var(--orange) 50%, var(--cyan) 82%, transparent);
    box-shadow: 0 0 8px var(--cyan-glow);
    animation: viz-lane-glow 3.2s ease-in-out infinite;
}

.viz-play-rail:first-child {
    left: 33%;
    transform: skewX(-8deg);
}

.viz-play-rail:last-child {
    left: 66%;
    transform: skewX(8deg);
}

.viz-play-portal {
    position: absolute;
    left: 50%;
    top: 12%;
    width: 42%;
    aspect-ratio: 1.2;
    transform: translateX(-50%);
    border-radius: 22%;
    border: 4px solid var(--orange);
    box-shadow: 0 0 20px var(--orange-glow);
    overflow: hidden;
    background: #04080e;
    z-index: 2;
}

.viz-play-ring {
    position: absolute;
    inset: 30%;
    border-radius: 18%;
    border: 1.5px solid rgba(62, 232, 255, 0.55);
    animation: viz-tunnel 3.6s linear infinite;
    opacity: 0;
}

.viz-play-ring:nth-child(2) { animation-delay: 1.2s; }
.viz-play-ring:nth-child(3) { animation-delay: 2.4s; }

.viz-play-spawn {
    position: absolute;
    inset: 0;
    z-index: 5;
    pointer-events: none;
    overflow: visible;
}

.viz-play-wall {
    position: absolute;
    top: 22%;
    width: 16%;
    height: 22%;
    margin: 0;
    transform: translateX(-50%) scale(0.4);
    background: linear-gradient(
        180deg,
        rgba(255, 70, 85, 0.35) 0%,
        rgba(255, 45, 60, 0.75) 45%,
        rgba(255, 40, 55, 0.55) 100%
    );
    border: 1.5px solid rgba(255, 120, 130, 0.9);
    box-shadow:
        0 0 18px rgba(255, 58, 72, 0.55),
        inset 0 0 12px rgba(255, 160, 170, 0.2);
    opacity: 0;
    animation: viz-wall-rush 1.85s cubic-bezier(0.25, 0.1, 0.45, 1) forwards;
    will-change: transform, top, opacity, height;
}

.viz-play-wall.lane-l { left: 28%; }
.viz-play-wall.lane-m { left: 50%; }
.viz-play-wall.lane-r { left: 72%; }

.viz-play-wall.is-static {
    animation: none;
    opacity: 0.85;
    top: 38%;
    height: 36%;
    transform: translateX(-50%) scale(0.95);
}

.viz-play-coin {
    position: absolute;
    z-index: 6;
    width: 12px;
    height: 12px;
    left: 62%;
    bottom: 28%;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 30%, #ffe9a0, var(--gold) 50%, #b8861a);
    box-shadow: 0 0 14px rgba(240, 196, 58, 0.7);
    animation: viz-coin-bob 2.8s ease-in-out infinite;
}

@keyframes viz-lane-glow {
    0%, 100% { opacity: 0.55; }
    50% { opacity: 1; }
}

@keyframes viz-tunnel {
    0% { inset: 38%; opacity: 0; }
    20% { opacity: 0.9; }
    100% { inset: -6%; opacity: 0; }
}

@keyframes viz-wall-rush {
    0% {
        top: 20%;
        height: 12%;
        opacity: 0;
        transform: translateX(-50%) scale(0.22);
    }
    10% {
        opacity: 1;
    }
    55% {
        opacity: 1;
    }
    100% {
        top: 54%;
        height: 48%;
        opacity: 0;
        transform: translateX(-50%) scale(1.25);
    }
}

@keyframes viz-coin-bob {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-10px) scale(1.12); }
}

/* —— Requirements: body dodge + hand tracking —— */
.viz-req {
    background:
        radial-gradient(ellipse 70% 40% at 50% 78%, rgba(62, 232, 255, 0.08) 0%, transparent 55%),
        linear-gradient(180deg, #10141c 0%, #080a0e 100%);
    border-radius: 12px;
}

.viz-req-grid {
    position: absolute;
    left: -10%;
    right: -10%;
    bottom: 8%;
    height: 55%;
    background-image:
        linear-gradient(rgba(62, 232, 255, 0.07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(62, 232, 255, 0.07) 1px, transparent 1px);
    background-size: 28px 28px;
    transform: perspective(420px) rotateX(62deg);
    transform-origin: center bottom;
    mask-image: linear-gradient(180deg, transparent, #000 35%, #000 75%, transparent);
    -webkit-mask-image: linear-gradient(180deg, transparent, #000 35%, #000 75%, transparent);
    opacity: 0.85;
    animation: viz-req-grid 4s ease-in-out infinite;
}

.viz-req-wall {
    position: absolute;
    width: 18%;
    height: 48%;
    left: 58%;
    bottom: 22%;
    background: linear-gradient(180deg, rgba(255, 58, 72, 0.18), rgba(255, 58, 72, 0.5));
    border: 1px solid rgba(255, 90, 100, 0.65);
    box-shadow: 0 0 18px rgba(255, 58, 72, 0.28);
    animation: viz-req-wall 3.6s ease-in-out infinite;
}

.viz-req-body {
    position: absolute;
    left: 50%;
    bottom: 24%;
    width: 28px;
    height: 78px;
    transform: translateX(-50%);
    transform-origin: center bottom;
    animation: viz-req-lean 3.6s ease-in-out infinite;
    z-index: 2;
}

.viz-req-torso {
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 18px;
    height: 44px;
    transform: translateX(-50%);
    border-radius: 9px 9px 6px 6px;
    background: linear-gradient(180deg, rgba(180, 195, 210, 0.35), rgba(120, 135, 155, 0.2));
    border: 1px solid rgba(220, 230, 240, 0.35);
    box-shadow: 0 0 16px rgba(62, 232, 255, 0.12);
}

.viz-req-head {
    position: absolute;
    left: 50%;
    top: 0;
    width: 20px;
    height: 20px;
    transform: translateX(-50%);
    border-radius: 50%;
    background: rgba(200, 210, 220, 0.28);
    border: 1px solid rgba(230, 240, 250, 0.4);
    box-shadow: 0 0 12px rgba(62, 232, 255, 0.15);
}

.viz-req-hand {
    position: absolute;
    z-index: 3;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: rgba(255, 138, 26, 0.35);
    border: 1.5px solid var(--orange);
    box-shadow: 0 0 12px var(--orange-glow);
}

.viz-req-hand--l {
    left: 36%;
    bottom: 42%;
    animation: viz-req-hand-l 3.6s ease-in-out infinite;
}

.viz-req-hand--r {
    right: 36%;
    bottom: 42%;
    animation: viz-req-hand-r 3.6s ease-in-out infinite;
}

.viz-req-trail {
    position: absolute;
    z-index: 1;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid rgba(255, 138, 26, 0.35);
    opacity: 0;
    animation: viz-req-trail 3.6s ease-out infinite;
}

.viz-req-trail--l {
    left: 30%;
    bottom: 38%;
}

.viz-req-trail--r {
    right: 30%;
    bottom: 38%;
    animation-delay: 0.15s;
}

@keyframes viz-req-grid {
    0%, 100% { opacity: 0.55; }
    50% { opacity: 0.95; }
}

@keyframes viz-req-lean {
    0%, 100% { transform: translateX(-50%) rotate(0deg); }
    35% { transform: translateX(-78%) rotate(-14deg); }
    55% { transform: translateX(-78%) rotate(-14deg); }
    78% { transform: translateX(-20%) rotate(6deg); }
}

@keyframes viz-req-wall {
    0% {
        left: 54%;
        opacity: 0;
        transform: scale(0.75);
    }
    18% { opacity: 0.95; }
    45% {
        left: 54%;
        opacity: 0.95;
        transform: scale(1);
    }
    70% {
        left: 72%;
        opacity: 0.35;
        transform: scale(1.05);
    }
    100% {
        left: 78%;
        opacity: 0;
        transform: scale(1.08);
    }
}

@keyframes viz-req-hand-l {
    0%, 100% { transform: translate(0, 0); }
    35%, 55% { transform: translate(-12px, -8px); }
    78% { transform: translate(4px, 4px); }
}

@keyframes viz-req-hand-r {
    0%, 100% { transform: translate(0, 0); }
    35%, 55% { transform: translate(-10px, 6px); }
    78% { transform: translate(6px, -4px); }
}

@keyframes viz-req-trail {
    0%, 30% { opacity: 0; transform: scale(0.4); }
    40% { opacity: 0.55; transform: scale(0.85); }
    70% { opacity: 0; transform: scale(1.4); }
    100% { opacity: 0; transform: scale(1.4); }
}

/* —— Support: player message in, reply out —— */
.viz-support {
    background:
        radial-gradient(ellipse 55% 45% at 50% 55%, rgba(62, 232, 255, 0.06) 0%, transparent 60%),
        linear-gradient(180deg, #10141c 0%, #080a0e 100%);
    border-radius: 12px;
}

.viz-support-msg {
    position: absolute;
    width: 52%;
    border-radius: 12px;
    padding: 14px 14px 12px;
    display: flex;
    flex-direction: column;
    gap: 7px;
    box-sizing: border-box;
}

.viz-support-msg span {
    display: block;
    height: 5px;
    border-radius: 3px;
    opacity: 0.85;
}

.viz-support-msg--in {
    left: 12%;
    top: 18%;
    background: rgba(255, 58, 72, 0.12);
    border: 1px solid rgba(255, 90, 100, 0.45);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    animation: viz-support-in 4.2s ease-in-out infinite;
}

.viz-support-msg--in span {
    background: rgba(255, 140, 150, 0.7);
}

.viz-support-msg--in span:nth-child(1) { width: 78%; }
.viz-support-msg--in span:nth-child(2) { width: 92%; }
.viz-support-msg--in span:nth-child(3) { width: 54%; }

.viz-support-msg--in::after {
    content: '';
    position: absolute;
    left: 16px;
    bottom: -7px;
    width: 12px;
    height: 12px;
    background: rgba(18, 14, 16, 0.95);
    border-right: 1px solid rgba(255, 90, 100, 0.45);
    border-bottom: 1px solid rgba(255, 90, 100, 0.45);
    transform: rotate(45deg);
}

.viz-support-msg--out {
    right: 12%;
    bottom: 22%;
    background: rgba(62, 232, 255, 0.1);
    border: 1px solid rgba(62, 232, 255, 0.45);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    animation: viz-support-out 4.2s ease-in-out infinite;
}

.viz-support-msg--out span {
    background: rgba(62, 232, 255, 0.7);
    margin-left: auto;
}

.viz-support-msg--out span:nth-child(1) { width: 70%; }
.viz-support-msg--out span:nth-child(2) { width: 48%; }

.viz-support-msg--out::after {
    content: '';
    position: absolute;
    right: 16px;
    bottom: -7px;
    width: 12px;
    height: 12px;
    background: rgba(10, 16, 22, 0.95);
    border-right: 1px solid rgba(62, 232, 255, 0.45);
    border-bottom: 1px solid rgba(62, 232, 255, 0.45);
    transform: rotate(45deg);
}

.viz-support-check {
    position: absolute;
    right: 18%;
    bottom: 12%;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid var(--orange);
    background: rgba(255, 138, 26, 0.15);
    box-shadow: 0 0 14px var(--orange-glow);
    opacity: 0;
    animation: viz-support-check 4.2s ease-in-out infinite;
}

.viz-support-check::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 3px;
    width: 6px;
    height: 10px;
    border-right: 2px solid var(--orange);
    border-bottom: 2px solid var(--orange);
    transform: rotate(40deg);
}

@keyframes viz-support-in {
    0%, 8% {
        opacity: 0;
        transform: translateY(12px);
    }
    18%, 72% {
        opacity: 1;
        transform: translateY(0);
    }
    88%, 100% {
        opacity: 0;
        transform: translateY(-6px);
    }
}

@keyframes viz-support-out {
    0%, 28% {
        opacity: 0;
        transform: translateY(14px);
    }
    40%, 78% {
        opacity: 1;
        transform: translateY(0);
    }
    92%, 100% {
        opacity: 0;
        transform: translateY(-4px);
    }
}

@keyframes viz-support-check {
    0%, 48% {
        opacity: 0;
        transform: scale(0.6);
    }
    58%, 82% {
        opacity: 1;
        transform: scale(1);
    }
    95%, 100% {
        opacity: 0;
        transform: scale(0.85);
    }
}

/* —— Privacy: on-device scan, no outbound —— */
.viz-privacy {
    background:
        radial-gradient(ellipse 50% 45% at 50% 48%, rgba(255, 138, 26, 0.05) 0%, transparent 60%),
        linear-gradient(180deg, #0e1218 0%, #080a0e 100%);
    border-radius: 12px;
}

.viz-privacy-device {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 46%;
    height: 52%;
    transform: translate(-50%, -50%);
    border-radius: 14px;
    border: 2px solid rgba(62, 232, 255, 0.45);
    background: rgba(8, 12, 18, 0.9);
    box-shadow: inset 0 0 24px rgba(62, 232, 255, 0.08);
    overflow: hidden;
}

.viz-privacy-scan {
    position: absolute;
    left: 10%;
    right: 10%;
    height: 2px;
    top: 12%;
    background: linear-gradient(90deg, transparent, var(--cyan), transparent);
    box-shadow: 0 0 10px var(--cyan-glow);
    animation: viz-scan 2.8s ease-in-out infinite;
}

.viz-privacy-lock {
    position: absolute;
    left: 50%;
    top: 52%;
    width: 22px;
    height: 18px;
    transform: translate(-50%, -50%);
    border-radius: 4px;
    border: 2px solid var(--orange);
    background: rgba(255, 138, 26, 0.12);
}

.viz-privacy-lock::before {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 100%;
    width: 12px;
    height: 10px;
    transform: translateX(-50%);
    border: 2px solid var(--orange);
    border-bottom: none;
    border-radius: 8px 8px 0 0;
}

.viz-privacy-signal {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 1.5px solid rgba(255, 58, 72, 0.7);
    opacity: 0.35;
}

.viz-privacy-signal--a {
    right: 12%;
    top: 28%;
    animation: viz-blocked 3s ease-in-out infinite;
}

.viz-privacy-signal--b {
    right: 18%;
    bottom: 24%;
    animation: viz-blocked 3s ease-in-out 1.2s infinite;
}

@keyframes viz-scan {
    0% { top: 12%; opacity: 0.4; }
    50% { top: 78%; opacity: 1; }
    100% { top: 12%; opacity: 0.4; }
}

@keyframes viz-blocked {
    0%, 100% { transform: translateX(0); opacity: 0.25; }
    40% { transform: translateX(-18px); opacity: 0.7; }
    55% { transform: translateX(-18px) scale(0.6); opacity: 0; }
    56% { transform: translateX(0); opacity: 0; }
    80% { opacity: 0.25; }
}

/* ================================
   FOOTER
================================ */
.sf-footer {
    border-top: 1px solid rgba(62, 232, 255, 0.08);
    padding: 1.75rem 3rem;
    background: #05070b;
}

.sf-footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 2rem;
    align-items: center;
    justify-content: space-between;
}

.sf-footer-brand,
.sf-footer-link,
.sf-footer-email {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    text-decoration: none;
    color: var(--text-dim);
    transition: color 0.2s;
}

.sf-footer-brand:hover,
.sf-footer-link:hover { color: var(--text-muted); }

.sf-footer-email { color: var(--text-muted); }
.sf-footer-email:hover { color: var(--cyan); }

/* ================================
   REVEAL
================================ */
.reveal {
    opacity: 0;
    transform: translateY(22px);
    transition:
        opacity 0.9s var(--ease-out),
        transform 0.9s var(--ease-out);
    transition-delay: calc(var(--delay, 0) * 1ms);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.sf-wordmark.reveal {
    transform: translateY(28px) translateX(-8px);
}

.sf-wordmark.reveal.visible {
    transform: translateY(0) translateX(0);
}

/* ================================
   RESPONSIVE
================================ */
@media (max-width: 768px) {
    nav {
        padding: 1rem 1.25rem;
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }

    nav.scrolled { padding: 0.85rem 1.25rem; }
    .nav-logo { font-size: 1.5rem; }
    .nav-links { gap: 1.1rem; flex-wrap: wrap; }
    nav a { font-size: 0.7rem; }

    .sf-hero {
        padding: 0 1.25rem 10vh;
        min-height: 100svh;
    }

    .sf-portal {
        width: min(62vw, 260px);
        top: 14%;
    }

    .sf-wall--near {
        left: 8%;
        height: 28vh;
        width: 36px;
    }

    .sf-wall--far {
        left: 58%;
        height: 20vh;
        width: 28px;
    }

    .sf-coin {
        width: 16px;
        height: 16px;
        left: 68%;
    }

    .sf-section,
    .sf-section--sparse,
    .sf-section--support {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    .sf-section-row {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .sf-viz {
        justify-self: start;
    }

    .viz-stage {
        margin-left: 0;
        max-width: 240px;
    }

    .sf-footer { padding: 1.5rem 1.25rem; }

    .sf-footer-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.65rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .sf-lane-set,
    .sf-portal-rim,
    .sf-tunnel span,
    .sf-coin,
    .viz-play-rail,
    .viz-play-ring,
    .viz-play-wall,
    .viz-play-coin,
    .viz-req-grid,
    .viz-req-wall,
    .viz-req-body,
    .viz-req-hand,
    .viz-req-trail,
    .viz-support-msg,
    .viz-support-check,
    .viz-privacy-scan,
    .viz-privacy-signal {
        animation: none;
    }

    .sf-tunnel span {
        opacity: 0.5;
    }

    .sf-tunnel span:nth-child(1) { inset: 35%; }
    .sf-tunnel span:nth-child(2) { inset: 25%; }
    .sf-tunnel span:nth-child(3) { inset: 15%; }
    .sf-tunnel span:nth-child(4) { inset: 5%; }
    .sf-tunnel span:nth-child(5) { inset: -2%; }

    .viz-play-ring {
        opacity: 0.4;
    }

    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
}