:root{
  /* Cute dark-pastel theme (fixed, no toggle) */
  --bg:#0b1020;
  --panel:#121a33;
  --text:#fff7fb;
  --sub:#ffd6e8;
  --border:rgba(255,182,193,.22);
  --accent:#ff6fb1;
  --accent2:#7c9cff;
  --accent3:#7ef3d6;
  --radius:22px;
}

*{box-sizing:border-box}

body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:
    radial-gradient(900px 420px at 18% 10%, rgba(255,111,177,.18), transparent 60%),
    radial-gradient(860px 420px at 82% 18%, rgba(124,156,255,.18), transparent 62%),
    radial-gradient(740px 420px at 50% 88%, rgba(126,243,214,.14), transparent 62%),
    var(--bg);
  color:var(--text);
  font-weight:700; /* 全站粗体 */
}

.container{max-width:980px;margin:52px auto;padding:20px}
.container.narrow{max-width:640px}

.card{
  background:
    linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.03));
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:26px;
  box-shadow:
    0 26px 70px rgba(0,0,0,.55),
    0 0 0 6px rgba(255,111,177,.06);
  position:relative;
  overflow:hidden;
}
.card:before{
  content:"";
  position:absolute; inset:-2px;
  background:
    radial-gradient(220px 220px at 10% 10%, rgba(255,111,177,.22), transparent 65%),
    radial-gradient(220px 220px at 90% 18%, rgba(124,156,255,.22), transparent 65%),
    radial-gradient(240px 240px at 55% 92%, rgba(126,243,214,.18), transparent 65%);
  pointer-events:none;
  filter:blur(2px);
}

h1,h2,h3{margin:0 0 10px;letter-spacing:.3px}
.sub{
  color:var(--sub);
  font-size:13px;
  font-weight:800;
  opacity:.92;
}

.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}

.tool{
  display:block;
  text-decoration:none;
  color:inherit;
  padding:18px 18px 16px;
  border-radius:20px;
  border:1px solid rgba(255,182,193,.22);
  background:rgba(255,255,255,.045);
  transition:.18s ease;
  position:relative;
  overflow:hidden;
}
.tool:before{
  content:"";
  position:absolute; inset:-1px;
  background:linear-gradient(135deg, rgba(255,111,177,.18), rgba(124,156,255,.12), rgba(126,243,214,.10));
  opacity:.55;
  pointer-events:none;
}
.tool:hover{
  transform:translateY(-5px) rotate(-.2deg);
  box-shadow:0 22px 48px rgba(0,0,0,.55);
}
.icon{
  width:44px;height:44px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg, var(--accent), var(--accent2));
  margin-bottom:10px;
  font-size:20px;
  box-shadow:0 14px 28px rgba(255,111,177,.25);
}

textarea,input{
  width:100%;
  margin-top:10px;
  padding:12px 14px;
  border-radius:16px;
  border:1px solid rgba(255,182,193,.22);
  background:rgba(0,0,0,.18);
  color:var(--text);
  font-size:15px;
  font-weight:800;
  outline:none;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.04);
}
textarea{min-height:140px;resize:vertical}
textarea::placeholder,input::placeholder{color:rgba(255,214,232,.55)}

.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:780px){
  .row{grid-template-columns:1fr}
  .container{margin:22px auto}
}

button{
  width:100%;
  margin-top:10px;
  padding:12px 14px;
  border:0;
  border-radius:16px;
  background:linear-gradient(135deg, var(--accent), var(--accent2));
  color:#fff;
  font-size:15px;
  font-weight:900;
  cursor:pointer;
  transition:.12s ease;
  box-shadow:0 16px 30px rgba(255,111,177,.22);
}
button.secondary{
  background:linear-gradient(135deg, rgba(255,255,255,.12), rgba(255,255,255,.06));
  border:1px solid rgba(255,182,193,.18);
  box-shadow:none;
}
button:hover{filter:brightness(1.03)}
button:active{transform:scale(.99)}

.actions{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(160px,1fr));
  gap:10px;
  margin-top:14px;
}

.result{
  margin-top:14px;
  padding:14px;
  border-radius:16px;
  border:1px dashed rgba(255,182,193,.28);
  background:rgba(255,255,255,.04);
  word-break:break-all;
  font-size:16px;
  font-weight:900;
}

.back{
  display:block;
  text-align:center;
  margin-top:16px;
  color:rgba(255,214,232,.78);
  text-decoration:none;
  font-size:14px;
  font-weight:900;
}
.back:hover{color:#fff7fb}

.toast{
  position:fixed;
  bottom:18px;left:50%;
  transform:translateX(-50%) translateY(10px);
  padding:10px 14px;
  border-radius:999px;
  border:1px solid rgba(255,182,193,.25);
  background:rgba(18,26,51,.92);
  color:var(--text);
  box-shadow:0 18px 40px rgba(0,0,0,.55);
  opacity:0;
  pointer-events:none;
  transition:.2s ease;
  font-weight:900;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Animated background (cute, subtle) */
body:before, body:after{
  content:"";
  position:fixed;
  inset:-20%;
  z-index:-1;
  pointer-events:none;
}

body:before{
  background:
    radial-gradient(900px 420px at 18% 10%, rgba(255,111,177,.22), transparent 60%),
    radial-gradient(860px 420px at 82% 18%, rgba(124,156,255,.22), transparent 62%),
    radial-gradient(740px 420px at 50% 88%, rgba(126,243,214,.18), transparent 62%);
  filter:blur(2px);
  animation:bgFloat 14s ease-in-out infinite alternate;
}

body:after{
  background:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,.10) 0 1px, transparent 2px),
    radial-gradient(circle at 60% 20%, rgba(255,255,255,.09) 0 1px, transparent 2px),
    radial-gradient(circle at 80% 70%, rgba(255,255,255,.08) 0 1px, transparent 2px),
    radial-gradient(circle at 35% 80%, rgba(255,255,255,.07) 0 1px, transparent 2px),
    radial-gradient(circle at 10% 65%, rgba(255,255,255,.06) 0 1px, transparent 2px);
  background-size: 240px 240px, 300px 300px, 360px 360px, 420px 420px, 520px 520px;
  opacity:.55;
  animation:starsDrift 22s linear infinite;
}

@keyframes bgFloat{
  0%{transform:translate3d(-1.5%, -1%, 0) scale(1.02)}
  50%{transform:translate3d(1.2%, 1.4%, 0) scale(1.05)}
  100%{transform:translate3d(-0.8%, 1%, 0) scale(1.03)}
}
@keyframes starsDrift{
  0%{transform:translate3d(0,0,0)}
  100%{transform:translate3d(-8%, -10%, 0)}
}