:root{
  --ink:#120e1c;
  --plum:#2a1b3a;
  --plum-soft:#3a2650;
  --rose:#e8a6ab;
  --rose-deep:#d97e88;
  --gold:#d4af87;
  --cream:#f6ece2;
  --cream-dim:#cdc0d6;
  --shadow: 0 20px 60px rgba(0,0,0,.45);
  --serif: 'Cormorant Garamond', serif;
  --sans: 'Nunito Sans', sans-serif;
}

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

[hidden]{ display:none !important; }

body{
  margin:0;
  min-height:100vh;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(232,166,171,.10), transparent 45%),
    radial-gradient(ellipse at 85% 80%, rgba(212,175,135,.08), transparent 50%),
    linear-gradient(180deg, var(--ink), #0b0813 60%, var(--ink));
  color:var(--cream);
  font-family:var(--sans);
  overflow-x:hidden;
  position:relative;
}

h1,h2{font-family:var(--serif); font-weight:600; margin:0;}
p{margin:0;}

.btn{
  font-family:var(--sans);
  font-size:.95rem;
  letter-spacing:.03em;
  padding:.95rem 2.2rem;
  border-radius:999px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .25s ease, box-shadow .25s ease, background .25s ease;
}
.btn:focus-visible{outline:2px solid var(--gold); outline-offset:3px;}
.btn-primary{
  background:linear-gradient(135deg, var(--rose-deep), var(--gold));
  color:#241221;
  font-weight:600;
  box-shadow:0 10px 30px rgba(217,126,136,.35);
}
.btn-primary:hover{transform:translateY(-2px); box-shadow:0 14px 36px rgba(217,126,136,.5);}
.btn-ghost{
  background:transparent;
  border-color:rgba(246,236,226,.35);
  color:var(--cream-dim);
}
.btn-ghost:hover{border-color:var(--cream-dim); color:var(--cream);}

.eyebrow{
  text-transform:uppercase;
  letter-spacing:.35em;
  font-size:.7rem;
  color:var(--rose);
  margin-bottom:.8rem;
}

/* ---------- Ambient hearts/stars ---------- */
.ambient{
  position:fixed; inset:0;
  pointer-events:none;
  z-index:1;
  overflow:hidden;
}
.ambient-heart{
  position:absolute;
  bottom:-40px;
  color:var(--rose);
  opacity:.35;
  animation:float-up linear forwards;
  will-change:transform, opacity;
}
@keyframes float-up{
  0%{ transform:translateY(0) translateX(0) rotate(0deg); opacity:0; }
  10%{ opacity:.5; }
  90%{ opacity:.35; }
  100%{ transform:translateY(-115vh) translateX(var(--drift,20px)) rotate(20deg); opacity:0; }
}

/* ---------- Screens (full height sections) ---------- */
.screen{
  position:relative;
  min-height:100vh;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding:2rem 1.5rem;
  z-index:2;
}

/* ---------- Lock screen ---------- */
.lock-card{
  max-width:440px;
  padding:3rem 2.4rem;
  border-radius:28px;
  background:linear-gradient(160deg, rgba(58,38,80,.55), rgba(18,14,28,.6));
  border:1px solid rgba(232,166,171,.18);
  box-shadow:var(--shadow);
  backdrop-filter:blur(6px);
}
.lock-heart{
  position:relative;
  width:80px; height:72px;
  margin:0 auto 1.6rem;
}
.lock-heart-svg{
  width:100%; height:100%;
  fill:var(--rose-deep);
  filter:drop-shadow(0 0 18px rgba(217,126,136,.55));
  animation:pulse 2.4s ease-in-out infinite;
}
.lock-icon{
  position:absolute; inset:0;
  display:flex; align-items:center; justify-content:center;
  font-size:1.4rem;
  transform:translateY(4px);
}
@keyframes pulse{
  0%,100%{ transform:scale(1); }
  50%{ transform:scale(1.08); }
}
.lock-title{ font-size:2rem; margin-bottom:.6rem; color:var(--cream);}
.lock-sub{ color:var(--cream-dim); font-size:1rem; margin-bottom:2rem; }

#lock-form{ display:flex; flex-direction:column; gap:1rem; }
#password-input{
  width:100%;
  padding:.95rem 1.2rem;
  border-radius:999px;
  border:1px solid rgba(246,236,226,.25);
  background:rgba(0,0,0,.2);
  color:var(--cream);
  font-family:var(--sans);
  font-size:1rem;
  text-align:center;
  letter-spacing:.08em;
}
#password-input::placeholder{ color:rgba(205,192,214,.55); }
#password-input:focus-visible{ outline:2px solid var(--gold); outline-offset:2px; }

.lock-error{
  color:var(--rose-deep);
  font-size:.85rem;
  margin-top:1rem;
  opacity:0;
  transition:opacity .2s ease;
}
.lock-error.show{ opacity:1; animation:shake .4s ease; }
@keyframes shake{
  0%,100%{ transform:translateX(0); }
  25%{ transform:translateX(-6px); }
  75%{ transform:translateX(6px); }
}
.lock-hint{
  margin-top:1.6rem;
  font-size:.78rem;
  color:rgba(205,192,214,.5);
  font-style:italic;
}

#lock-screen{ transition:opacity .6s ease, filter .6s ease; }
#lock-screen.dissolve{ opacity:0; filter:blur(10px); pointer-events:none; }

/* ---------- Opening ---------- */
.opening-heart{ font-size:5rem; margin-bottom:1rem; }
.opening-heart .beat{
  display:inline-block;
  color:var(--rose-deep);
  filter:drop-shadow(0 0 30px rgba(217,126,136,.6));
  animation:heartbeat 1.6s ease-in-out infinite;
}
@keyframes heartbeat{
  0%,100%{ transform:scale(1); }
  20%{ transform:scale(1.15); }
  35%{ transform:scale(.98); }
  50%{ transform:scale(1.1); }
}
.opening-title{ font-size:clamp(2.4rem, 6vw, 4rem); color:var(--cream); margin-bottom:.8rem; }
.opening-sub{ color:var(--cream-dim); font-size:1.15rem; max-width:34ch; margin-bottom:2.4rem; font-family:var(--serif); font-style:italic;}
.scroll-cue{
  position:absolute; bottom:2.2rem;
  font-size:.75rem; letter-spacing:.15em;
  color:rgba(205,192,214,.5);
  animation:bob 2.2s ease-in-out infinite;
}
@keyframes bob{ 0%,100%{transform:translateY(0);} 50%{transform:translateY(6px);} }

/* ---------- Thread spine ---------- */
.thread-track{
  position:absolute;
  top:100vh; left:50%;
  width:2px;
  height:calc(100% - 200vh);
  transform:translateX(-50%);
  z-index:0;
}
.thread-line{ width:100%; height:100%; overflow:visible; }
.thread-line line{
  stroke:var(--rose-deep);
  stroke-width:2;
  stroke-dasharray:6 10;
  opacity:.35;
}

/* ---------- Chapters ---------- */
.chapter{
  position:relative;
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:4rem;
  padding:6rem 8vw;
  z-index:2;
}
.chapter.reverse{ flex-direction:row-reverse; }
.chapter-marker{
  flex:0 0 auto;
  width:74px; height:74px;
  border-radius:50%;
  border:1px solid rgba(232,166,171,.3);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--serif); font-size:1.3rem; color:var(--rose);
  background:rgba(42,27,58,.4);
  box-shadow:0 0 0 rgba(217,126,136,0);
  transition:box-shadow .6s ease, border-color .6s ease, transform .6s ease;
}
.chapter.in-view .chapter-marker{
  box-shadow:0 0 34px rgba(217,126,136,.55);
  border-color:var(--rose-deep);
  transform:scale(1.06);
}
.chapter-content{
  max-width:520px;
  opacity:0;
  transform:translateY(28px);
  transition:opacity .8s ease, transform .8s ease;
}
.chapter.in-view .chapter-content{ opacity:1; transform:translateY(0); }
.chapter-content.wide{ max-width:820px; }
.chapter-kicker{
  color:var(--gold);
  text-transform:uppercase;
  letter-spacing:.25em;
  font-size:.72rem;
  margin-bottom:.7rem;
}
.chapter-title{ font-size:clamp(1.8rem, 4vw, 2.6rem); color:var(--cream); margin-bottom:1.1rem; }
.chapter-text{ font-size:1.08rem; line-height:1.75; color:var(--cream-dim); }

/* memory grid */
.memory-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:1.2rem;
  margin-top:1.6rem;
}
.memory-card{
  background:rgba(58,38,80,.35);
  border:1px solid rgba(232,166,171,.15);
  border-radius:18px;
  padding:1.6rem 1.3rem;
  text-align:left;
  transition:transform .3s ease, border-color .3s ease;
}
.memory-card:hover{ transform:translateY(-4px); border-color:rgba(232,166,171,.4); }
.memory-icon{ font-size:1.5rem; display:block; margin-bottom:.7rem; }
.memory-card p{ color:var(--cream-dim); font-size:.95rem; line-height:1.5; }

/* ---------- Ending ---------- */
.ending-title{
  font-size:clamp(1.8rem, 5vw, 3rem);
  max-width:16ch;
  color:var(--cream);
  margin-bottom:2.4rem;
}
.ending-buttons{
  position:relative;
  display:flex;
  gap:1.4rem;
  align-items:center;
  min-height:60px;
}
#no-btn{ position:relative; transition:transform .18s ease; }
.ending-note{
  margin-top:1.6rem;
  color:var(--cream-dim);
  font-style:italic;
  font-family:var(--serif);
  font-size:1.05rem;
  min-height:1.4em;
}

/* ---------- Celebration overlay ---------- */
.celebration{
  position:fixed; inset:0;
  z-index:50;
  display:flex; align-items:center; justify-content:center;
  background:radial-gradient(ellipse at center, rgba(58,38,80,.96), rgba(11,8,19,.98));
  backdrop-filter:blur(4px);
  opacity:0;
  animation:fade-in .6s ease forwards;
}
.celebration[hidden]{ display:none; }
@keyframes fade-in{ to{ opacity:1; } }
.celebration-inner{ text-align:center; max-width:480px; padding:2rem; }
.celebration-heart{
  font-size:4rem; color:var(--rose-deep);
  filter:drop-shadow(0 0 30px rgba(217,126,136,.6));
  animation:heartbeat 1.4s ease-in-out infinite;
  margin-bottom:1rem;
}
.celebration-inner h2{ font-size:2.2rem; color:var(--cream); margin-bottom:.8rem; }
.celebration-inner p{ color:var(--cream-dim); margin-bottom:2rem; font-family:var(--serif); font-style:italic; font-size:1.1rem; }

#confetti-canvas{
  position:fixed; inset:0;
  z-index:60;
  pointer-events:none;
  display:none;
}

/* ---------- Responsive ---------- */
@media (max-width: 820px){
  .chapter, .chapter.reverse{
    flex-direction:column;
    text-align:center;
    padding:5rem 6vw;
    gap:1.6rem;
  }
  .chapter-content{ max-width:100%; }
  .memory-grid{ grid-template-columns:1fr; }
  .thread-track{ left:50%; }
}
@media (max-width: 480px){
  .lock-card{ padding:2.2rem 1.4rem; }
  .opening-heart{ font-size:3.6rem; }
  .ending-buttons{ flex-direction:column; }
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}