/* ── SLIDE CONTAINER ─────────────────────────────── */
.stage {
    position: fixed;
    inset: 0;
    background: #05050f;
    overflow: hidden;
    animation: crtFlicker 6s infinite;
}
@keyframes crtFlicker {
    0%, 100% { opacity: 1; }
    92% { opacity: 1; }
    93% { opacity: 0.92; }
    94% { opacity: 1; }
}

/* starfield — oversized so parallax shift does not show empty edges */
#starfield {
    position: absolute;
    top: -8%;
    left: -8%;
    width: 116%;
    height: 116%;
    pointer-events: none;
    z-index: 0;
    will-change: transform;
}
@media (prefers-reduced-motion: reduce) {
    #starfield { will-change: auto; }
}
.star {
    position: absolute;
    border-radius: 50%;
    background: white;
    animation: twinkle var(--d, 3s) var(--del, 0s) ease-in-out infinite alternate;
}
@keyframes twinkle {
    from { opacity: var(--a1, 0.2); }
    to { opacity: var(--a2, 0.8); }
}

/* city skyline */
.skyline {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 200px;
    image-rendering: pixelated;
    display: block;
}

/* glow thread */
.thread-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}
/* heart: grayscale by default; color on hover or when dock latched via click */
.thread-svg .heart {
    pointer-events: none;
    cursor: pointer;
    filter: grayscale(100%);
    transition: filter 0.28s ease;
    -webkit-tap-highlight-color: transparent;
}
.thread-svg .heart.heart--ready {
    pointer-events: auto;
}
.thread-svg .heart:hover,
.thread-svg .heart.heart--latched,
.thread-svg .heart:focus-visible {
    filter: grayscale(0%);
}
.thread-svg .heart:focus {
    outline: none;
}
.thread-path {
    stroke-dasharray: 600;
    stroke-dashoffset: 600;
    animation: drawLine 2s 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
@keyframes drawLine {
    to { stroke-dashoffset: 0; }
}

/* ── PIXEL HEART (1000×600 thread-svg; t = 2.8s) ───── */
.heart {
    opacity: 0;
    transform-origin: 500px 255px;
    transform-box: view-box;
    animation:
        heartAppear 0.7s 2.8s cubic-bezier(0.34, 1.56, 0.64, 1) forwards,
        heartBeat 1.6s 3.6s infinite;
}
@keyframes heartAppear {
    0% { opacity: 0; transform: scale(0) rotate(-12deg); }
    60% { opacity: 1; transform: scale(2.6) rotate(0deg); }
    100% { opacity: 1; transform: scale(2) rotate(0deg); }
}
@keyframes heartBeat {
    0%, 100% { transform: scale(2); }
    14% { transform: scale(2.28); }
    28% { transform: scale(2); }
    42% { transform: scale(2.16); }
    70% { transform: scale(2); }
}
.heart-aura {
    opacity: 0;
    transform-origin: 500px 255px;
    transform-box: view-box;
    animation:
        auraIn 0.9s 2.8s ease forwards,
        auraPulse 1.6s 3.6s ease-in-out infinite;
}
@keyframes auraIn {
    0% { opacity: 0; transform: scale(0.85); }
    100% { opacity: 1; transform: scale(1.55); }
}
@keyframes auraPulse {
    0%, 100% { opacity: 0.4; transform: scale(1.55); }
    50% { opacity: 0.65; transform: scale(1.85); }
}

/* phones */
.phone-left, .phone-right {
    position: absolute;
    animation: phoneRise 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    opacity: 0;
}
.phone-left {
    left: calc(50% - 320px);
    top: calc(50% - 110px);
    animation-delay: 0.1s;
}
.phone-right {
    right: calc(50% - 320px);
    top: calc(50% - 110px);
    animation-delay: 0.3s;
}
@keyframes phoneRise {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* hero text */
.hero-title {
    position: absolute;
    bottom: 190px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    white-space: nowrap;
    animation: fadeUp 0.8s 0.5s ease forwards;
    opacity: 0;
}
.hero-title h1 {
    font-size: clamp(24px, 4vw, 40px);
    color: white;
    letter-spacing: 4px;
    text-shadow: 0 0 24px rgba(212, 83, 126, 0.18), 0 0 40px rgba(93, 202, 165, 0.1);
}
.hero-title p {
    font-size: clamp(7px, 1vw, 10px);
    color: var(--teal);
    letter-spacing: 3px;
    margin-top: 10px;
}
.hero-sub {
    position: absolute;
    bottom: 160px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 7px;
    color: var(--purple-l);
    letter-spacing: 2px;
    white-space: nowrap;
    animation: fadeUp 0.8s 0.8s ease forwards;
    opacity: 0;
}
@keyframes fadeUp {
    from { opacity: 0; transform: translateX(-50%) translateY(16px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}
.hero-scroll-hint {
    position: absolute;
    bottom: 160px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--purple-l);
    opacity: 0;
    animation: fadeUp 0.8s 1.2s ease forwards, arrowBounce 1.4s 2s ease-in-out infinite;
}
.hero-scroll-hint--top {
    bottom: auto;
    top: 160px;
    animation: fadeUp 0.8s 1.2s ease forwards, arrowBounceUp 1.4s 2s ease-in-out infinite;
}
.hero-scroll-arrow {
    display: block;
    opacity: 0.6;
}
.hero-scroll-hint, .hero-scroll-hint--top {
    transition: opacity 0.35s ease;
}
@keyframes arrowBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50%       { transform: translateX(-50%) translateY(7px); }
}
@keyframes arrowBounceUp {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50%       { transform: translateX(-50%) translateY(-7px); }
}

@media (max-width: 640px) {
    @keyframes heartAppear {
        0%   { opacity: 0; transform: scale(0) rotate(-12deg); }
        60%  { opacity: 1; transform: scale(4.5) rotate(0deg); }
        100% { opacity: 1; transform: scale(3.5) rotate(0deg); }
    }
    @keyframes heartBeat {
        0%, 100% { transform: scale(3.5); }
        14%  { transform: scale(3.9); }
        28%  { transform: scale(3.5); }
        42%  { transform: scale(3.7); }
        70%  { transform: scale(3.5); }
    }
}

/* scan line effect */
.scanlines {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: repeating-linear-gradient(
        to bottom,
        transparent 0px,
        transparent 3px,
        rgba(0, 0, 0, 0.08) 3px,
        rgba(0, 0, 0, 0.08) 4px
    );
}

/* window light flicker in buildings */
.win {
    animation: winFlicker var(--d, 4s) var(--del, 0s) ease-in-out infinite alternate;
}
@keyframes winFlicker {
    0%, 100% { opacity: var(--a, 0.7); }
    50% { opacity: calc(var(--a, 0.7) * 0.4); }
}

/* corner brackets */
.corner {
    position: fixed;
    width: 22px;
    height: 22px;
    border-color: var(--teal);
    border-style: solid;
    z-index: 40;
    pointer-events: none;
    animation: fadeIn 0.6s 1.3s ease forwards;
    opacity: 0;
}
.corner.tl { top: 18px; left: 18px; border-width: 2px 0 0 2px; }
.corner.tr { top: 18px; right: 18px; border-width: 2px 2px 0 0; }
.corner.bl { bottom: 18px; left: 18px; border-width: 0 0 2px 2px; }
.corner.br { bottom: 18px; right: 18px; border-width: 0 2px 2px 0; }
@keyframes fadeIn {
    to { opacity: 1; }
}