/* ============ base / palette ============ */
:root{
  --pink:#ffd1e3;
  --pink-deep:#ff8fb8;
  --rose:#ff6fa5;
  --lav:#e7d6ff;
  --lav-deep:#c9a8ff;
  --peach:#ffe0c7;
  --cream:#fff6ef;
  --baby:#cdeaff;
  --ink:#6b4a5a;
  --ink-soft:#9c7d8c;
  --shadow:0 18px 40px -18px rgba(255,111,165,.55);
  --font:'Quicksand',sans-serif;
  --script:'Dancing Script',cursive;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink);
  background:
    radial-gradient(1200px 700px at 10% -5%, #ffe6f1 0%, transparent 55%),
    radial-gradient(1100px 650px at 95% 8%, #efe2ff 0%, transparent 55%),
    radial-gradient(900px 600px at 50% 100%, #fff0e0 0%, transparent 60%),
    linear-gradient(160deg,#fff6fb 0%, #fdefff 40%, #fff2ec 100%);
  background-attachment:fixed;
  overflow-x:hidden;
  cursor:default;
}
img{display:block;max-width:100%}
::selection{background:var(--pink-deep);color:#fff}

/* ============ canvas + cursor trail ============ */
#particles{position:fixed;inset:0;z-index:0;pointer-events:none}
#trail{position:fixed;inset:0;z-index:60;pointer-events:none;overflow:hidden}
.trail-heart{position:absolute;font-size:18px;will-change:transform,opacity;animation:trailPop .9s ease-out forwards}
@keyframes trailPop{0%{transform:translate(-50%,-50%) scale(.4);opacity:1}
  100%{transform:translate(-50%,-140%) scale(1.1);opacity:0}}

/* ============ generic sections ============ */
section{position:relative;z-index:2}
.screen{min-height:100vh;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;padding:60px 22px}
.screen-tall{min-height:100vh;padding:110px 22px 90px;text-align:center}
.hidden-sec{display:none}

.section-title{
  font-family:var(--script);
  font-size:clamp(2.4rem,6vw,4.2rem);
  color:var(--rose);
  font-weight:700;
  text-shadow:0 4px 18px rgba(255,111,165,.25);
}
.section-note{color:var(--ink-soft);font-size:1.05rem;margin:.4rem 0 2.6rem;font-weight:500}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(40px);transition:opacity .9s ease,transform .9s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ============ INTRO envelope ============ */
#intro{background:transparent}
.intro-glow{position:absolute;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,143,184,.55),transparent 65%);
  filter:blur(20px);animation:pulseGlow 4s ease-in-out infinite;z-index:0}
@keyframes pulseGlow{0%,100%{transform:scale(1);opacity:.8}50%{transform:scale(1.15);opacity:1}}
.envelope-wrap{position:relative;z-index:3;display:flex;flex-direction:column;align-items:center;gap:26px}
.floaty-label{font-family:var(--script);font-size:2rem;color:var(--rose);animation:bob 3s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

.envelope{position:relative;width:300px;height:200px;cursor:pointer;transition:transform .4s}
.envelope:hover{transform:scale(1.05) rotate(-1deg)}
.env-back{position:absolute;inset:0;border-radius:14px;
  background:linear-gradient(135deg,#ffb3d1,#ff8fb8);box-shadow:var(--shadow)}
.env-letter{position:absolute;left:8%;right:8%;bottom:6%;top:18%;
  background:linear-gradient(160deg,#fffdfb,#fff0f6);border-radius:10px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  transition:transform .8s cubic-bezier(.2,.9,.2,1);z-index:1}
.env-letter .env-heart{font-size:2.4rem;animation:beat 1.4s infinite}
.env-letter p{color:var(--ink-soft);font-weight:600;letter-spacing:.5px}
.env-front{position:absolute;inset:0;z-index:2;border-radius:14px;
  background:linear-gradient(135deg,#ffc6dd,#ffa6c8);
  clip-path:polygon(0 35%,50% 78%,100% 35%,100% 100%,0 100%)}
.env-flap{position:absolute;left:0;right:0;top:0;height:62%;z-index:4;transform-origin:top;
  background:linear-gradient(135deg,#ff9cc2,#ff7aad);
  clip-path:polygon(0 0,100% 0,50% 92%);transition:transform .7s ease;border-radius:14px 14px 0 0}
.env-seal{position:absolute;top:42%;left:50%;transform:translate(-50%,-50%);z-index:5;
  width:46px;height:46px;border-radius:50%;background:radial-gradient(circle,#ff5e96,#e23c78);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.3rem;
  box-shadow:0 6px 14px rgba(226,60,120,.5);transition:opacity .3s,transform .5s}
.envelope.open .env-flap{transform:rotateX(180deg)}
.envelope.open .env-seal{opacity:0;transform:translate(-50%,-50%) scale(0)}
.envelope.open .env-letter{transform:translateY(-130px) scale(1.08);box-shadow:var(--shadow)}
.tap-hint{color:var(--ink-soft);font-weight:600;letter-spacing:2px;text-transform:uppercase;font-size:.7rem;animation:bob 2.4s ease-in-out infinite}

/* ============ HERO ============ */
#hero{overflow:hidden}
.hero-inner{position:relative;z-index:4}
.kicker{font-family:var(--script);font-size:1.7rem;color:var(--lav-deep);margin-bottom:.4rem}
.hero-title{font-family:'Pacifico',cursive;font-weight:400;line-height:.98;
  font-size:clamp(3.2rem,12vw,8rem);
  background:linear-gradient(120deg,#ff7aad,#c9a8ff 55%,#ffb38a);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 10px 26px rgba(255,122,173,.3));animation:floatTitle 6s ease-in-out infinite}
.hero-title .amp{font-family:var(--script);font-size:.5em}
@keyframes floatTitle{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.hero-sub{margin-top:1rem;color:var(--ink-soft);font-weight:600;letter-spacing:1px}
.counter-pill{margin:1.6rem auto 0;display:inline-block;padding:.7rem 1.4rem;border-radius:999px;
  background:rgba(255,255,255,.65);backdrop-filter:blur(8px);box-shadow:var(--shadow);
  color:var(--ink);font-weight:600}
.counter-pill b{color:var(--rose);font-size:1.15em}
.scroll-cue{margin-top:2.4rem;color:var(--ink-soft);font-weight:600;font-size:.85rem;
  display:flex;flex-direction:column;align-items:center;gap:10px;animation:bob 2.4s infinite}
.mouse{width:24px;height:40px;border:2px solid var(--pink-deep);border-radius:14px;position:relative}
.mouse::after{content:'';position:absolute;left:50%;top:7px;width:5px;height:5px;border-radius:50%;
  background:var(--rose);transform:translateX(-50%);animation:scrolldot 1.6s infinite}
@keyframes scrolldot{0%{opacity:1;top:7px}100%{opacity:0;top:20px}}

/* floating photo cluster behind hero */
.heart-photo-cluster{position:absolute;inset:0;z-index:1;pointer-events:none}
.float-photo{position:absolute;width:138px;height:138px;border-radius:20px;overflow:hidden;
  box-shadow:var(--shadow);border:1.5px solid rgba(255,255,255,.7);opacity:.95;filter:saturate(1.08)}
.float-photo img{width:100%;height:100%;object-fit:cover;display:block}

/* ============ TIMELINE ============ */
.timeline{max-width:920px;margin:0 auto;position:relative;padding:20px 0}
.timeline::before{content:'';position:absolute;left:50%;top:0;bottom:0;width:4px;
  background:linear-gradient(var(--pink-deep),var(--lav-deep),var(--peach));
  transform:translateX(-50%);border-radius:4px}
.tl-item{position:relative;width:50%;padding:26px 38px;box-sizing:border-box}
.tl-item:nth-child(odd){left:0;text-align:right}
.tl-item:nth-child(even){left:50%;text-align:left}
.tl-dot{position:absolute;top:38px;width:22px;height:22px;border-radius:50%;
  background:#fff;border:4px solid var(--rose);box-shadow:0 0 0 6px rgba(255,143,184,.25);z-index:2}
.tl-item:nth-child(odd) .tl-dot{right:-11px}
.tl-item:nth-child(even) .tl-dot{left:-11px}
.tl-card{background:rgba(255,255,255,.78);backdrop-filter:blur(8px);border-radius:20px;
  padding:14px;box-shadow:var(--shadow);display:inline-block;transition:transform .35s;border:2px solid #fff}
.tl-card:hover{transform:translateY(-6px) scale(1.03)}
.tl-card img{width:230px;height:170px;object-fit:cover;border-radius:14px}
.tl-date{font-family:var(--script);color:var(--lav-deep);font-size:1.5rem;margin-top:6px}
.tl-text{color:var(--ink);font-weight:600;font-size:.95rem}
@media(max-width:640px){
  .timeline::before{left:18px}
  .tl-item{width:100%;left:0!important;text-align:left!important;padding-left:46px;padding-right:8px}
  .tl-item .tl-dot{left:7px!important;right:auto!important}
  .tl-card img{width:100%;height:190px}
}

/* ============ POLAROID BOARD ============ */
.polaroid-board{position:relative;max-width:1000px;min-height:560px;margin:0 auto}
.polaroid{position:absolute;background:#fff;padding:12px 12px 42px;border-radius:6px;
  box-shadow:0 14px 30px -10px rgba(150,90,120,.45);cursor:grab;
  transition:box-shadow .3s;touch-action:none;will-change:transform}
.polaroid:active{cursor:grabbing}
.polaroid img{width:200px;height:200px;object-fit:cover;border-radius:3px;pointer-events:none}
.polaroid .cap{font-family:var(--script);font-size:1.4rem;color:var(--ink);text-align:center;margin-top:6px}
.polaroid:hover{box-shadow:0 22px 46px -10px rgba(255,111,165,.6);z-index:30!important}
.pin{position:absolute;top:-10px;left:50%;transform:translateX(-50%);width:18px;height:18px;
  border-radius:50%;background:radial-gradient(circle at 35% 30%,#ff9cc2,#e23c78);
  box-shadow:0 3px 6px rgba(0,0,0,.25)}
@media(max-width:640px){
  .polaroid img{width:140px;height:140px}
  .polaroid-board{min-height:1100px}
}

/* ============ CAROUSEL (heart frame) ============ */
.carousel{display:flex;align-items:center;justify-content:center;gap:18px;max-width:680px;margin:0 auto}
.car-stage{position:relative;width:360px;height:360px;flex:0 0 auto}
.car-slide{position:absolute;inset:0;opacity:0;transform:scale(.85) rotate(-4deg);
  transition:opacity .7s,transform .7s;pointer-events:none}
.car-slide.active{opacity:1;transform:none;pointer-events:auto}
.heart-mask{width:100%;height:100%;
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 29'%3E%3Cpath d='M16 29s-13-8.4-13-17.3C3 6.1 7 3 11 3c2.7 0 4.5 1.5 5 3 .5-1.5 2.3-3 5-3 4 0 8 3.1 8 8.7C29 20.6 16 29 16 29z'/%3E%3C/svg%3E") center/contain no-repeat;
  mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 29'%3E%3Cpath d='M16 29s-13-8.4-13-17.3C3 6.1 7 3 11 3c2.7 0 4.5 1.5 5 3 .5-1.5 2.3-3 5-3 4 0 8 3.1 8 8.7C29 20.6 16 29 16 29z'/%3E%3C/svg%3E") center/contain no-repeat;
  filter:drop-shadow(0 16px 30px rgba(255,111,165,.5))}
.heart-mask img{width:100%;height:100%;object-fit:cover}
.car-btn{width:52px;height:52px;border-radius:50%;border:none;cursor:pointer;flex:0 0 auto;
  background:rgba(255,255,255,.8);box-shadow:var(--shadow);color:var(--rose);font-size:1.8rem;
  line-height:1;transition:transform .25s,background .25s}
.car-btn:hover{transform:scale(1.15);background:#fff}
.car-dots{display:flex;gap:9px;justify-content:center;margin-top:22px}
.car-dots span{width:10px;height:10px;border-radius:50%;background:var(--pink);cursor:pointer;transition:.3s}
.car-dots span.on{background:var(--rose);transform:scale(1.35)}

/* ============ VIDEO ============ */
.video-frame{position:relative;max-width:520px;margin:0 auto;background:#fff;padding:16px;
  border-radius:22px;box-shadow:var(--shadow);transform:rotate(-1.2deg)}
.video-frame video{width:100%;border-radius:14px;display:block;background:#000}
.video-tape{position:absolute;width:90px;height:30px;background:rgba(255,180,210,.6);
  backdrop-filter:blur(2px);transform:rotate(-20deg)}
.video-tape.tl{top:-12px;left:-22px}
.video-tape.tr{top:-12px;right:-22px;transform:rotate(20deg)}

/* ============ REASON CARDS (flip) ============ */
.reason-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:20px;
  max-width:760px;margin:0 auto}
.reason{height:170px;perspective:900px;cursor:pointer}
.reason-inner{position:relative;width:100%;height:100%;transition:transform .7s;transform-style:preserve-3d}
.reason.flip .reason-inner{transform:rotateY(180deg)}
.reason-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:20px;
  display:flex;align-items:center;justify-content:center;padding:16px;text-align:center;
  box-shadow:var(--shadow);font-weight:700}
.reason-front{background:linear-gradient(150deg,#ffd6e8,#e9d4ff);color:var(--rose);font-size:2.4rem}
.reason-back{background:linear-gradient(150deg,#fff,#fff0f6);transform:rotateY(180deg);
  color:var(--ink);font-size:1rem;font-weight:600;line-height:1.4}

/* ============ FINALE letter ============ */
#finale{display:flex;align-items:center;justify-content:center}
.letter{max-width:640px;background:linear-gradient(160deg,#fffdfb,#fff2f8);
  border-radius:26px;padding:48px 40px;box-shadow:var(--shadow);border:2px solid #fff;position:relative}
.letter::before{content:'❤';position:absolute;top:-22px;left:50%;transform:translateX(-50%);
  font-size:2.6rem;filter:drop-shadow(0 6px 10px rgba(255,111,165,.5))}
.letter-title{font-family:var(--script);font-size:2.6rem;color:var(--rose);margin-bottom:1rem}
.letter-body{color:var(--ink);font-size:1.12rem;line-height:1.85;font-weight:500;min-height:160px}
.letter-body .cursor{display:inline-block;width:2px;background:var(--rose);animation:blink .8s steps(2) infinite}
@keyframes blink{50%{opacity:0}}
.letter-sign{font-family:var(--script);font-size:1.7rem;color:var(--lav-deep);margin-top:1.2rem}
.love-btn{margin-top:1.8rem;border:none;cursor:pointer;padding:.9rem 2.2rem;border-radius:999px;
  background:linear-gradient(120deg,#ff7aad,#c9a8ff);color:#fff;font-weight:700;font-size:1.05rem;
  box-shadow:var(--shadow);transition:transform .25s}
.love-btn:hover{transform:scale(1.08) translateY(-2px)}

.footer-note{text-align:center;padding:40px 20px 60px;color:var(--ink-soft);font-family:var(--script);font-size:1.3rem;position:relative;z-index:2}

/* music toggle */
.music-toggle{position:fixed;right:18px;bottom:18px;z-index:70;width:52px;height:52px;border-radius:50%;
  border:none;cursor:pointer;background:rgba(255,255,255,.8);box-shadow:var(--shadow);font-size:1.4rem;
  transition:transform .3s}
.music-toggle:hover{transform:scale(1.12)}
.music-toggle.playing{animation:spin 4s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

@keyframes beat{0%,100%{transform:scale(1)}25%{transform:scale(1.18)}50%{transform:scale(1)}}

/* big heart burst overlay */
#burst{position:fixed;inset:0;z-index:80;pointer-events:none}
.burst-heart{position:absolute;font-size:26px;will-change:transform,opacity;animation:burstUp 2.4s ease-out forwards}
@keyframes burstUp{0%{transform:translateY(0) scale(.4);opacity:1}
  100%{transform:translateY(-90vh) scale(1.3);opacity:0}}

@media(prefers-reduced-motion:reduce){*{animation-duration:.001ms!important;transition-duration:.001ms!important}}