body {
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: url("heart-bg.jpg");
    background-size: cover;
    background-position: center;
    font-family: "Pixelify Sans", sans-serif;
    overflow: hidden;
    touch-action: manipulation;
}

/* --- Screen 1: Envelope --- */
#envelope-container { text-align: center; cursor: pointer; }
#envelope { width: 350px; animation: pulse 1.5s infinite; }
.envelope-text {
    font-size: 36px;
    color: #000;
    margin-top: 25px;
    font-weight: bold;
}
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* --- Screen 2 & 3: Letter Window --- */
#letter-container {
    display: none;
    position: fixed;
    inset: 0;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

/*
  window.png is 2000x1825px.
  Content pane (pink checkerboard) runs:
    top 31.8% (y=580) → bottom 91.5% (y=1670)
    left 10%  (x=200) → right  92.5% (x=1850)
*/
.letter-window {
    width: min(90vw, 90vh * (2000 / 1825));
    aspect-ratio: 2000 / 1825;
    position: relative;
    background: url("window.png") no-repeat center / contain;
    transform: scale(1.1);
    opacity: 0;
    transition: all 0.6s ease;
    flex-shrink: 0;
}

.letter-window.open { transform: scale(1); opacity: 1; }

.content-wrapper {
    position: absolute;
    top: 32.5%;
    left: 11%;
    width: 80%;
    height: 57%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-evenly;
    color: #000;
    box-sizing: border-box;
}

h1 { font-size: clamp(16px, 3.8vw, 36px); margin: 0; text-align: center; line-height: 1.2; }
h2 { font-size: clamp(13px, 2.2vw, 22px); margin: 0; min-height: 1.3em; text-align: center; }

.cat { width: clamp(100px, 32%, 200px); }

/* Both buttons sit naturally in flow, side by side */
.buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    width: 100%;
}

.btn { width: clamp(70px, 16%, 120px); cursor: pointer; }

/*
  No-btn starts static (in-flow next to yes).
  JS adds .flying on first interaction → switches to fixed so it can roam.
*/
.no-btn {
    transition: left 0.22s ease, top 0.22s ease;
}

.no-btn.flying {
    position: fixed;
    z-index: 100;
}

/* --- Final State --- */
.final-text {
    font-size: clamp(13px, 2.2vw, 22px);
    line-height: 1.4;
    text-align: center;
    margin: 0;
    opacity: 0.85;   /* ← subtle softness */
}

.trail-heart {
    position: fixed;
    pointer-events: none;
    z-index: 999;
    animation: fadeUp 1s forwards;
}
@keyframes fadeUp {
    0%   { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(-30px); }
}

@keyframes shake {
    0% { transform: translateX(0); }
    25% { transform: translateX(-2px); }
    50% { transform: translateX(2px); }
    75% { transform: translateX(-2px); }
    100% { transform: translateX(0); }
}

@keyframes pulseYes {
    0%,100% { transform: scale(var(--yes-scale,1)); }
    50% { transform: scale(calc(var(--yes-scale,1) + 0.08)); }
}

@keyframes screenShake {
    0% { transform: translate(0,0); }
    25% { transform: translate(-2px,2px); }
    50% { transform: translate(2px,-2px); }
    75% { transform: translate(-2px,2px); }
    100% { transform: translate(0,0); }
}


.yes-clone {
    z-index: 50;
}


.yes-clone {
    z-index: 50;
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.35s ease, transform 0.35s ease;
}

.yes-clone.show {
    opacity: 1;
    transform: scale(1);
}