/* keting · 共用外观层
   纸底 + 雾 + 毛玻璃。所有页面引这一份。 */

:root{
  /* 墨 */
  --ink:#1A1F24;
  --ink2:#39424B;
  --dim:#79828B;
  --faint:#AEB5BA;

  /* 底 */
  --paper:#E9EAE6;
  --plum:#8C3A57;
  --plum-wash:rgba(140,58,87,.11);
  --sage:#A3B0A6;
  --sand:#D9CDBD;

  /* 玻璃 */
  --glass:rgba(251,251,249,.54);
  --glass-up:rgba(253,253,251,.72);
  --rim:rgba(255,255,255,.62);
  --edge:rgba(122,132,138,.22);
  --edge-hard:rgba(122,132,138,.34);
  --shade:rgba(60,70,78,.07);

  --mono:ui-monospace,"Cascadia Mono","SF Mono",Consolas,"Liberation Mono",monospace;
  --serif:"Songti SC","Source Han Serif SC","Noto Serif CJK SC",Georgia,"Times New Roman",serif;
  --sans:"PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;

  --r:14px;
  --safe:env(safe-area-inset-bottom);
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}

html{background:var(--paper)}

body{
  margin:0;
  min-height:100dvh;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:15px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  position:relative;
  overflow-x:hidden;
}

/* ── 雾：玻璃底下得有东西可以糊，不然模糊看不出来 ── */
body::before{
  content:"";
  position:fixed;inset:-25%;
  z-index:-2;
  background:
    radial-gradient(38% 30% at 18% 14%, rgba(140,58,87,.20), transparent 68%),
    radial-gradient(42% 34% at 82% 30%, rgba(163,176,166,.30), transparent 70%),
    radial-gradient(46% 36% at 40% 88%, rgba(217,205,189,.42), transparent 72%),
    radial-gradient(30% 26% at 92% 82%, rgba(140,58,87,.10), transparent 70%);
  filter:blur(12px);
  animation:drift 46s ease-in-out infinite alternate;
}
@keyframes drift{
  from{transform:translate3d(0,0,0) scale(1)}
  to  {transform:translate3d(-3.5%,2.5%,0) scale(1.09)}
}

/* ── 纸纹：压在雾上面，把渐变的塑料感磨掉 ── */
body::after{
  content:"";
  position:fixed;inset:0;
  z-index:-1;pointer-events:none;
  background-image:radial-gradient(rgba(112,120,124,.075) 1px,transparent 1px);
  background-size:3px 3px;
}

a{color:inherit;text-decoration:none}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}

.wrap{
  max-width:600px;margin:0 auto;
  padding:26px 18px calc(64px + var(--safe));
}

/* ════ 玻璃 ════ */
.pane{
  position:relative;
  background:var(--glass);
  -webkit-backdrop-filter:blur(18px) saturate(1.5);
  backdrop-filter:blur(18px) saturate(1.5);
  border:1px solid var(--edge);
  border-radius:var(--r);
  box-shadow:
    inset 1px 1px 0 var(--rim),
    inset -1px -1px 0 rgba(120,130,136,.09),
    0 6px 20px -12px var(--shade);
}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){
  .pane{background:rgba(252,252,250,.93)}
}

/* ════ 顶栏 ════ */
.nav{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:11px 15px;margin-bottom:18px;
  position:sticky;top:10px;z-index:40;
}
.nav .ttl{font-size:16px;letter-spacing:.2em;font-weight:600}
.nav .back{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;color:var(--dim);
  border:1px solid var(--edge);border-radius:100px;padding:3px 11px;
  transition:color .15s,border-color .15s;
}
.nav .back:active{color:var(--ink);border-color:var(--edge-hard)}
.nav .cnt{font-family:var(--mono);font-size:10px;color:var(--dim);letter-spacing:.08em}

/* ════ 刻字 ════ */
.etch{
  font-family:var(--serif);
  color:rgba(90,100,106,.22);                 /* 兜底 */
  user-select:none;pointer-events:none;
}
@supports ((-webkit-background-clip:text) or (background-clip:text)){
  .etch{
    color:transparent;
    background:linear-gradient(160deg,rgba(90,100,106,.30),rgba(90,100,106,.10));
    -webkit-background-clip:text;background-clip:text;
    text-shadow:0 1px 0 rgba(255,255,255,.55);
  }
}

/* ════ 通用零件 ════ */
.mk{font-family:var(--mono);font-size:10px;letter-spacing:.3em;color:var(--dim)}
.hint{font-family:var(--mono);font-size:10.5px;color:var(--dim);letter-spacing:.05em}

.btn{
  border:1px solid var(--edge-hard);border-radius:100px;
  background:var(--glass-up);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  padding:7px 17px;font-size:13.5px;letter-spacing:.06em;
  cursor:pointer;transition:background .15s,border-color .15s,transform .1s;
}
.btn:active{transform:translateY(1px)}
.btn.key{border-color:var(--plum);color:var(--plum)}
.btn:disabled{opacity:.42;cursor:default}

.field{
  width:100%;
  background:rgba(255,255,255,.5);
  border:1px solid var(--edge);border-radius:10px;
  padding:10px 12px;outline:none;
  font-size:15px;line-height:1.7;
  transition:border-color .15s,box-shadow .15s,background .15s;
}
.field:focus{
  border-color:var(--plum);
  background:rgba(255,255,255,.72);
  box-shadow:0 0 0 3px var(--plum-wash);
}
.field::placeholder{color:var(--faint)}
textarea.field{resize:vertical;min-height:88px}

.empty{
  padding:30px 20px;text-align:center;
  color:var(--dim);font-size:14px;line-height:2;
}
.empty b{display:block;color:var(--ink2);font-size:15px;margin-bottom:4px;font-weight:600}

.toast{
  position:fixed;left:50%;bottom:calc(26px + var(--safe));
  transform:translate(-50%,14px);
  padding:8px 18px;border-radius:100px;
  background:rgba(26,31,36,.9);color:#F2F3F1;
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  font-size:13px;letter-spacing:.06em;
  opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;
  z-index:90;
}
.toast.on{opacity:1;transform:translate(-50%,0)}

:focus-visible{outline:2px solid var(--plum);outline-offset:2px;border-radius:4px}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}