:root {
    --bg: #07070b;
    --bg-soft: #111119;
    --white: #fffafc;
    --muted: rgba(255, 250, 252, 0.72);
    --pink: #ff6f91;
    --pink-soft: #ff8eaa;
    --red: #ff416c;
    --glow: rgba(255, 82, 125, 0.55);
}

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html,
body {
    margin: 0;
    min-height: 100%;
    background: var(--bg);
    color: var(--white);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    overflow: hidden;
}

body {
    min-height: 100dvh;
    position: relative;
    background:
        radial-gradient(circle at 50% 45%, rgba(120, 23, 54, 0.13), transparent 42%),
        linear-gradient(180deg, #08080c 0%, #050507 100%);
}

body.started {
    animation: backgroundAwake 3s ease forwards;
}

#starCanvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.12;
    transition: opacity 1.8s ease;
}

body.started #starCanvas {
    opacity: 0.72;
}

.vignette {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: radial-gradient(circle at center, transparent 35%, rgba(0, 0, 0, 0.6) 100%);
}

.scene {
    position: relative;
    z-index: 2;
    width: 100%;
    height: 100dvh;
    display: grid;
    place-items: center;
    overflow: hidden;
    padding: 24px;
}

.intro,
.experience {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
}

.start-button,
.again-button {
    appearance: none;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.055);
    color: var(--white);
    border-radius: 999px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
    cursor: pointer;
    font: inherit;
    touch-action: manipulation;
}

.start-button {
    min-width: 168px;
    padding: 15px 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 0.98rem;
    letter-spacing: 0.01em;
    animation: idleFloat 3s ease-in-out infinite;
    transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.start-button:hover,
.start-button:focus-visible,
.again-button:hover,
.again-button:focus-visible {
    background: rgba(255, 111, 145, 0.12);
    border-color: rgba(255, 142, 170, 0.36);
    outline: none;
}

.start-button:active,
.again-button:active {
    transform: scale(0.97);
}

.start-heart {
    font-size: 1.2rem;
    color: var(--pink);
    filter: drop-shadow(0 0 10px var(--glow));
}

.intro.hide {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.7s ease;
}

.experience {
    pointer-events: none;
}

.heart-wrap {
    position: absolute;
    left: 50%;
    top: 42%;
    width: min(34vw, 150px);
    aspect-ratio: 1 / 0.9;
    transform: translate(-50%, -50%) scale(0.72);
    opacity: 0;
    pointer-events: auto;
    cursor: pointer;
    touch-action: manipulation;
}

.heart-wrap.draw-in {
    opacity: 1;
    animation: heartArrive 1.2s cubic-bezier(.2,.8,.2,1) forwards;
}

.main-heart {
    width: 100%;
    height: 100%;
    overflow: visible;
    filter: drop-shadow(0 0 18px rgba(255, 65, 108, 0.3));
}

.main-heart path {
    fill: rgba(255, 65, 108, 0.11);
    stroke: #ff6b8d;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 280;
    stroke-dashoffset: 280;
}

.heart-wrap.draw-in .main-heart path {
    animation:
        drawHeart 2.4s cubic-bezier(.65,0,.35,1) forwards,
        fillHeart 1.2s ease 1.65s forwards;
}

.heart-wrap.beating {
    animation: heartbeat 1s ease-in-out 3;
}

.heart-glow {
    position: absolute;
    inset: 17%;
    border-radius: 50%;
    background: rgba(255, 60, 106, 0.18);
    filter: blur(24px);
    opacity: 0;
    transition: opacity 1.3s ease;
}

.heart-wrap.draw-in .heart-glow {
    opacity: 1;
}

.whisper {
    position: absolute;
    top: calc(42% + min(22vw, 105px));
    margin: 0;
    padding: 0 24px;
    text-align: center;
    color: var(--muted);
    font-size: clamp(1rem, 4vw, 1.18rem);
    letter-spacing: 0.015em;
    opacity: 0;
    transform: translateY(8px);
}

.whisper.show {
    animation: fadeUp 0.9s ease forwards;
}

.whisper.hide {
    animation: fadeAway 0.7s ease forwards;
}

.love-block {
    position: absolute;
    left: 50%;
    top: 67%;
    width: min(90vw, 640px);
    transform: translate(-50%, -50%);
    text-align: center;
    opacity: 0;
}

.love-block.show {
    opacity: 1;
}

.love-title {
    margin: 0;
    min-height: 1.2em;
    font-size: clamp(2.3rem, 11vw, 5.2rem);
    font-weight: 650;
    line-height: 1;
    letter-spacing: -0.045em;
    text-shadow: 0 0 22px rgba(255, 111, 145, 0.24);
}

.love-title .letter {
    display: inline-block;
    opacity: 0;
    transform: translateY(14px) scale(0.96);
    filter: blur(4px);
    animation: letterIn 0.55s cubic-bezier(.2,.8,.2,1) forwards;
}

.love-subtitle {
    margin: 10px 0 0;
    color: rgba(255,255,255,0.64);
    font-size: clamp(1rem, 4.2vw, 1.25rem);
    letter-spacing: 0.08em;
    text-transform: lowercase;
    opacity: 0;
    transform: translateY(8px);
}

.love-subtitle.show {
    animation: fadeUp 0.9s ease forwards;
}

.again-button {
    position: absolute;
    left: 50%;
    bottom: max(10vh, 72px);
    transform: translateX(-50%) translateY(10px);
    padding: 11px 18px;
    font-size: 0.9rem;
    letter-spacing: 0.02em;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.7s ease, transform 0.7s ease, background 0.25s ease;
}

.again-button.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.final-message {
    position: absolute;
    left: 50%;
    top: 78%;
    transform: translate(-50%, 12px);
    width: 90%;
    margin: 0;
    text-align: center;
    font-size: clamp(1.1rem, 5vw, 1.55rem);
    color: rgba(255,255,255,0.88);
    opacity: 0;
}

.final-message.show {
    animation: finalReveal 1.1s ease forwards;
}

.easter-egg {
    position: fixed;
    top: max(env(safe-area-inset-top), 18px);
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    margin: 0;
    padding: 9px 14px;
    border-radius: 999px;
    background: rgba(18,18,24,0.72);
    border: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.78);
    font-size: 0.82rem;
    white-space: nowrap;
    opacity: 0;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.easter-egg.show {
    animation: eggPop 3.2s ease forwards;
}

.floating-layer,
.burst-layer,
.click-layer {
    position: fixed;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.float-heart,
.burst-heart,
.click-heart {
    position: absolute;
    color: var(--pink-soft);
    text-shadow: 0 0 12px rgba(255, 111, 145, 0.42);
    user-select: none;
}

.float-heart {
    bottom: -50px;
    opacity: 0;
    animation: floatHeart var(--duration) linear infinite;
    animation-delay: var(--delay);
    font-size: var(--size);
}

.burst-heart {
    bottom: -40px;
    left: var(--left);
    font-size: var(--size);
    animation: burstRise var(--duration) cubic-bezier(.18,.68,.28,1) forwards;
}

.spark {
    position: absolute;
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: rgba(255,255,255,0.9);
    box-shadow: 0 0 10px rgba(255,255,255,0.8);
    animation: sparkPop 1.8s ease-out forwards;
}

.click-heart {
    transform: translate(-50%, -50%);
    font-size: 22px;
    animation: clickHeart 1.55s ease-out forwards;
}

.signature {
    position: fixed;
    right: 18px;
    bottom: calc(16px + env(safe-area-inset-bottom));
    z-index: 3;
    color: rgba(255,255,255,0.25);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    opacity: 0;
    transition: opacity 1s ease;
    pointer-events: none;
}

body.finished .signature {
    opacity: 1;
}

@keyframes idleFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

@keyframes backgroundAwake {
    from { background-color: #07070b; }
    to { background-color: #09080d; }
}

@keyframes heartArrive {
    0% { opacity: 0; transform: translate(-50%, -50%) scale(0.72); }
    100% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

@keyframes drawHeart {
    to { stroke-dashoffset: 0; }
}

@keyframes fillHeart {
    to { fill: rgba(255, 65, 108, 0.9); }
}

@keyframes heartbeat {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    35% { transform: translate(-50%, -50%) scale(1.12); }
    55% { transform: translate(-50%, -50%) scale(0.98); }
}

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

@keyframes fadeAway {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-8px); }
}

@keyframes letterIn {
    to { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }
}

@keyframes finalReveal {
    to { opacity: 1; transform: translate(-50%, 0); text-shadow: 0 0 18px rgba(255, 111, 145, 0.24); }
}

@keyframes floatHeart {
    0% { transform: translate3d(0, 0, 0) rotate(0deg); opacity: 0; }
    12% { opacity: 0.62; }
    72% { opacity: 0.42; }
    100% { transform: translate3d(var(--drift), -115vh, 0) rotate(var(--rotate)); opacity: 0; }
}

@keyframes burstRise {
    0% { transform: translateY(0) scale(0.65) rotate(0deg); opacity: 0; }
    12% { opacity: 0.9; }
    100% { transform: translate(var(--drift), -120vh) scale(1.05) rotate(var(--rotate)); opacity: 0; }
}

@keyframes sparkPop {
    0% { transform: translate(0,0) scale(0); opacity: 0; }
    20% { opacity: 1; transform: translate(0,0) scale(1); }
    100% { transform: translate(var(--dx), var(--dy)) scale(0); opacity: 0; }
}

@keyframes clickHeart {
    0% { opacity: 0; transform: translate(-50%, -25%) scale(0.55); }
    18% { opacity: 1; }
    100% { opacity: 0; transform: translate(-50%, -150%) scale(1.18) rotate(var(--tilt)); }
}

@keyframes eggPop {
    0% { opacity: 0; transform: translateX(-50%) translateY(-10px); }
    16%, 72% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(-6px); }
}

@media (max-height: 650px) {
    .heart-wrap { top: 36%; width: min(30vw, 120px); }
    .whisper { top: 52%; }
    .love-block { top: 66%; }
    .again-button { bottom: 7vh; }
    .final-message { top: 82%; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}