:root{
  --paper:#fffaf6;
  --paper-strong:#fff;
  --ink:#563842;
  --muted:#8e7079;
  --line:rgba(126,74,91,.14);
  --rose:#e85d7f;
  --rose-deep:#c94369;
  --rose-soft:#ffe1e9;
  --sky:#dceeff;
  --mint:#dff5e7;
  --amber:#fff0c7;
  --shadow:0 20px 60px rgba(117,58,78,.13);
  --safe-top:env(safe-area-inset-top,0px);
  --safe-right:env(safe-area-inset-right,0px);
  --safe-bottom:env(safe-area-inset-bottom,0px);
  --safe-left:env(safe-area-inset-left,0px);
}

*{box-sizing:border-box}
html,body{width:100%;min-height:100%;margin:0}
body{
  overflow-x:hidden;
  color:var(--ink);
  background:var(--paper);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",-apple-system,"Segoe UI",sans-serif;
  -webkit-tap-highlight-color:transparent;
  text-rendering:optimizeLegibility;
}
button,textarea{font:inherit}
button{cursor:pointer}

/* 页面背景使用低对比度色块，避免干扰 Canvas 中的爱心点位。 */
.page-background{
  position:fixed;
  z-index:-2;
  inset:0;
  background:
    linear-gradient(165deg,#fffaf6 0%,#fff2f3 46%,#edf5ff 100%);
}
.page-background::before{
  content:"";
  position:absolute;
  inset:0;
  opacity:.36;
  background-image:radial-gradient(rgba(113,74,88,.16) .7px,transparent .7px);
  background-size:24px 24px;
  mask-image:linear-gradient(to bottom,#000 0%,transparent 78%);
}

/* 主页面默认隐藏，开场动画完成后再淡入。 */
.page-shell{
  width:min(1120px,calc(100% - 32px));
  min-height:100dvh;
  margin:0 auto;
  padding:
    max(24px,var(--safe-top))
    max(0px,var(--safe-right))
    max(28px,var(--safe-bottom))
    max(0px,var(--safe-left));
  display:grid;
  grid-template-columns:minmax(0,1.08fr) minmax(340px,.72fr);
  grid-template-rows:auto minmax(0,1fr);
  gap:18px;
  align-content:center;
  visibility:hidden;
  opacity:0;
  transform:translateY(14px);
  transition:opacity .65s ease,transform .65s ease,visibility 0s linear .65s;
}
body.is-ready .page-shell{
  visibility:visible;
  opacity:1;
  transform:none;
  transition-delay:0s;
}

.progress-panel{
  grid-column:1 / -1;
  display:grid;
  gap:14px;
  padding:18px 20px;
  border:1px solid rgba(255,255,255,.76);
  border-radius:16px;
  background:rgba(255,255,255,.68);
  box-shadow:0 12px 34px rgba(117,58,78,.08);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}
.progress-heading{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
}
.eyebrow{
  margin:0 0 5px;
  color:var(--rose-deep);
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
}
.progress-heading h1{
  margin:0;
  font-size:clamp(20px,3.8vw,31px);
  line-height:1.2;
  letter-spacing:0;
}
.progress-number{
  flex:none;
  margin:0;
  color:var(--muted);
  font-size:13px;
  font-variant-numeric:tabular-nums;
}
.progress-number strong{
  color:var(--rose-deep);
  font-size:clamp(24px,4vw,34px);
}
.progress-track{
  height:8px;
  overflow:hidden;
  border-radius:999px;
  background:rgba(115,73,87,.1);
}
.progress-track span{
  display:block;
  width:0;
  height:100%;
  border-radius:inherit;
  background:linear-gradient(90deg,#f29aaf,#e85d7f 58%,#d44d74);
  transition:width .65s cubic-bezier(.2,.8,.2,1);
}

/* Canvas 尺寸由 JS 按设备像素比设置，视觉上保持完整比例。 */
.canvas-panel{
  position:relative;
  min-height:340px;
  overflow:hidden;
  border:1px solid rgba(255,255,255,.8);
  border-radius:18px;
  background:rgba(255,255,255,.5);
  box-shadow:var(--shadow);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
#progressCanvas{
  display:block;
  width:100%;
  height:100%;
}
.canvas-empty{
  position:absolute;
  left:50%;
  top:56%;
  margin:0;
  color:var(--muted);
  font-size:13px;
  opacity:.58;
  transform:translate(-50%,-50%);
  transition:opacity .35s ease;
  pointer-events:none;
}
.canvas-empty.is-hidden{opacity:0}

.side-column{
  display:grid;
  align-content:center;
  gap:18px;
}
.message-card,
.submit-card{
  border:1px solid rgba(255,255,255,.82);
  border-radius:16px;
  background:rgba(255,255,255,.76);
  box-shadow:var(--shadow);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}
.message-card{
  position:relative;
  min-height:205px;
  padding:26px 25px;
  overflow:hidden;
}
.message-card::after{
  content:"“";
  position:absolute;
  right:20px;
  bottom:-25px;
  color:var(--rose);
  font-family:Georgia,serif;
  font-size:118px;
  line-height:1;
  opacity:.09;
  pointer-events:none;
}
.message-card blockquote{
  position:relative;
  z-index:1;
  display:flex;
  min-height:96px;
  align-items:center;
  margin:0;
  color:#4f3340;
  font-size:clamp(20px,3.2vw,27px);
  font-weight:650;
  line-height:1.55;
  overflow-wrap:anywhere;
  white-space:pre-wrap;
}
.message-state{
  position:relative;
  z-index:1;
  margin:16px 0 0;
  color:var(--muted);
  font-size:12px;
}

.submit-card{padding:22px}
#blessingForm{display:grid;gap:12px}
#blessingForm label{
  color:var(--ink);
  font-size:14px;
  font-weight:700;
}
textarea{
  width:100%;
  min-height:102px;
  resize:vertical;
  padding:14px 15px;
  border:1px solid var(--line);
  border-radius:12px;
  outline:none;
  color:var(--ink);
  background:rgba(255,250,247,.92);
  line-height:1.6;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
textarea::placeholder{color:#b49ca4}
textarea:focus{
  border-color:rgba(232,93,127,.62);
  background:#fff;
  box-shadow:0 0 0 4px rgba(232,93,127,.1);
}
textarea:disabled{opacity:.62;cursor:not-allowed}
.form-footer{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
}
#characterCount{
  color:var(--muted);
  font-size:12px;
  font-variant-numeric:tabular-nums;
}
#submitButton{
  min-width:116px;
  min-height:44px;
  padding:10px 20px;
  border:0;
  border-radius:12px;
  color:#fff;
  background:linear-gradient(135deg,#ed7896,#df5378);
  box-shadow:0 10px 22px rgba(202,66,104,.24);
  font-weight:750;
  transition:transform .18s ease,box-shadow .18s ease,opacity .18s ease;
}
#submitButton:hover{transform:translateY(-1px);box-shadow:0 13px 26px rgba(202,66,104,.28)}
#submitButton:active{transform:translateY(1px)}
#submitButton:focus-visible{outline:3px solid rgba(232,93,127,.24);outline-offset:2px}
#submitButton:disabled{opacity:.48;cursor:not-allowed;transform:none;box-shadow:none}
.form-status{
  min-height:20px;
  margin:0;
  color:var(--muted);
  font-size:12px;
  line-height:1.5;
}
.form-status.is-success{color:#25744c}
.form-status.is-error{color:#bd3c58}

/* 开场动画沿用原版卡片组心、停留、消散的节奏。 */
.opening-stage{
  position:fixed;
  z-index:20;
  inset:0;
  overflow:hidden;
  visibility:visible;
  opacity:1;
  transition:opacity .55s ease,visibility 0s linear .55s;
  pointer-events:none;
}
.opening-stage.is-finished{
  visibility:hidden;
  opacity:0;
}
.opening-card{
  position:absolute;
  display:flex;
  align-items:center;
  justify-content:center;
  width:max-content;
  min-width:58px;
  max-width:min(31vw,132px);
  min-height:38px;
  padding:7px 10px;
  border:1px solid rgba(255,255,255,.74);
  border-radius:12px;
  box-shadow:0 5px 18px rgba(166,70,94,.13);
  font-size:clamp(12px,3.3vw,15px);
  font-weight:650;
  line-height:1.25;
  text-align:center;
  white-space:nowrap;
  opacity:0;
  transform:translate(-50%,-50%) scale(.58) rotate(var(--rot,0deg));
  transition:opacity .18s ease-out,transform .24s cubic-bezier(.2,1.25,.4,1);
  will-change:transform,opacity;
}
.opening-card.show{
  opacity:1;
  transform:translate(-50%,-50%) scale(1) rotate(var(--rot,0deg));
}
.opening-card.bye{
  opacity:0;
  transform:translate(-50%,-50%) scale(.82) rotate(var(--rot,0deg));
  transition:opacity .2s ease-in,transform .2s ease-in;
}
.opening-spark{
  position:absolute;
  color:var(--spark-color);
  font-size:16px;
  line-height:1;
  opacity:0;
  transform:translate(-50%,-50%) scale(.35) rotate(var(--rot,0deg));
  animation:spark-rise 2.35s cubic-bezier(.2,.65,.35,1) forwards;
  animation-delay:var(--delay,0ms);
  will-change:transform,opacity;
}
@keyframes spark-rise{
  0%{opacity:0;transform:translate(-50%,-50%) scale(.35) rotate(var(--rot,0deg))}
  16%{opacity:.76}
  72%{opacity:.72}
  100%{opacity:0;transform:translate(-50%,calc(-50% - var(--rise,64px))) scale(1) rotate(calc(var(--rot,0deg) + 18deg))}
}

@media (max-width:820px){
  .page-shell{
    width:min(100% - 24px,620px);
    min-height:100dvh;
    grid-template-columns:1fr;
    grid-template-rows:auto auto auto;
    gap:12px;
    align-content:start;
    padding-top:max(14px,var(--safe-top));
  }
  .progress-panel{
    padding:15px 16px;
    border-radius:14px;
  }
  .canvas-panel{
    min-height:clamp(300px,49dvh,460px);
  }
  .side-column{
    gap:12px;
  }
  .message-card{
    min-height:172px;
    padding:21px 20px;
  }
  .message-card blockquote{
    min-height:78px;
    font-size:clamp(18px,5.3vw,23px);
  }
  .submit-card{padding:18px}
}

@media (max-width:390px){
  .progress-heading{align-items:center}
  .progress-heading h1{font-size:18px}
  .progress-number span{display:none}
  .canvas-panel{min-height:clamp(280px,45dvh,390px)}
  .message-card{min-height:158px}
  #submitButton{min-width:106px;padding-inline:16px}
}

@media (max-height:700px) and (max-width:820px){
  .canvas-panel{min-height:270px}
  .message-card{min-height:142px}
}

@media (prefers-reduced-motion:reduce){
  .page-shell,
  .opening-card,
  .opening-stage,
  .progress-track span{
    transition-duration:1ms !important;
  }
  .opening-spark{animation-duration:1ms;animation-delay:0ms}
}