/* ============================================
   知时 — 水墨现代主义
   墨黑 · 流金 · 雾灰 · 气韵流动
   ============================================ */

/* === Reset & Root === */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --ink:#0a0a0f;
  --paper:#0f0f18;
  --card:rgba(15,15,26,.88);
  --gold:#c9a84c;
  --gold-l:#e8cf70;
  --gold-d:#8a6d28;
  --gold-glow:rgba(201,168,76,.12);
  --mist:rgba(180,170,150,.35);
  --mist-dim:rgba(180,170,150,.18);
  --tx:#e0d8c8;
  --tx2:#989080;
  --tx3:#585048;
  --bd:rgba(201,168,76,.12);
  --bd2:rgba(201,168,76,.28);
  --radius:10px;
}
html{font-size:16px;-webkit-font-smoothing:antialiased}
body{
  font-family:'Noto Serif SC','PingFang SC','Source Han Serif SC','SimSun',serif;
  background:var(--ink);
  color:var(--tx);
  min-height:100vh;overflow-x:hidden;
}
body::before{
  content:'';position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.015'/%3E%3C/svg%3E");
  opacity:.5;
}

/* === Background Canvas === */
.bg-layer{position:fixed;inset:0;z-index:0;pointer-events:none}
#bgCanvas{width:100%;height:100%;opacity:.6}
.bg-overlay{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 20%,rgba(201,168,76,.04) 0%,transparent 60%),
    radial-gradient(ellipse 60% 60% at 50% 80%,rgba(10,8,4,.9) 0%,transparent 50%),
    linear-gradient(180deg,var(--ink) 0%,var(--paper) 100%);
}

/* === App Shell === */
.app{
  position:relative;z-index:1;
  max-width:500px;margin:0 auto;
  padding:48px 20px 60px;
  display:flex;flex-direction:column;align-items:center;
  min-height:100vh;
  animation:fadeUp 1s ease-out;
}
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}

/* === Header === */
.header{text-align:center;margin-bottom:42px}
.header-line{
  width:88px;height:1px;
  background:linear-gradient(90deg,transparent,var(--gold-d),transparent);
  margin:0 auto 26px;opacity:.6;
}
.header h1{
  font-size:56px;font-weight:900;letter-spacing:28px;
  background:linear-gradient(180deg,var(--gold-l) 0%,var(--gold) 50%,var(--gold-d) 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
  filter:drop-shadow(0 0 32px var(--gold-glow));
  margin-bottom:14px;
  animation:titleBreath 4s ease-in-out infinite;
}
@keyframes titleBreath{
  0%,100%{filter:drop-shadow(0 0 32px var(--gold-glow))}
  50%{filter:drop-shadow(0 0 48px rgba(201,168,76,.2))}
}
.tagline{
  font-size:16px;color:var(--mist);letter-spacing:14px;font-weight:400;
  text-transform:uppercase;
}

/* === Card === */
.card{
  width:100%;
  background:var(--card);
  border:1px solid var(--bd);
  border-radius:var(--radius);
  padding:32px 24px 28px;
  backdrop-filter:blur(24px);
  -webkit-backdrop-filter:blur(24px);
  box-shadow:
    0 0 80px rgba(0,0,0,.5),
    0 0 0 1px rgba(201,168,76,.04) inset;
  position:relative;overflow:hidden;
}
.card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(201,168,76,.15),transparent);
}
.card::after{
  content:'';position:absolute;bottom:0;right:0;
  width:160px;height:160px;
  background:radial-gradient(circle at 100% 100%,rgba(201,168,76,.02) 0%,transparent 70%);
  pointer-events:none;
}

/* === Mode Tabs === */
.mode-tabs{
  display:flex;gap:4px;margin-bottom:28px;
  background:rgba(255,255,255,.02);border-radius:8px;padding:3px;
}
.mode-tab{
  flex:1;padding:11px 0;
  background:none;border:none;border-radius:6px;
  color:var(--tx3);font-size:15px;font-weight:600;
  letter-spacing:6px;cursor:pointer;font-family:inherit;
  transition:all .3s;position:relative;
}
.mode-tab:hover{color:var(--tx2)}
.mode-tab.active{
  color:var(--gold-l);
  background:rgba(201,168,76,.08);
  box-shadow:0 0 16px rgba(201,168,76,.06);
}

/* === Panels === */
.mode-panel{display:none;animation:panelIn .4s ease-out}
.mode-panel.active{display:block}
@keyframes panelIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* === Rows === */
.row{display:flex;gap:14px;margin-bottom:18px}
.row.two .field{flex:1}
.field{flex:1;min-width:0}
.field label{
  display:block;font-size:11px;color:var(--mist);letter-spacing:4px;
  margin-bottom:8px;font-weight:500;text-transform:uppercase;
}

/* === Select === */
.field select{
  width:100%;padding:13px 38px 13px 14px;
  font-size:15px;font-family:inherit;font-weight:500;
  color:var(--tx);background:rgba(20,20,36,.6);
  border:1px solid rgba(255,255,255,.06);border-radius:8px;
  cursor:pointer;
  appearance:none;-webkit-appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23989880' opacity='.4'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;
  transition:all .3s;
}
.field select:hover{border-color:rgba(255,255,255,.1);background:rgba(24,24,42,.7)}
.field select:focus{outline:none;border-color:var(--gold);box-shadow:0 0 20px var(--gold-glow)}
.field select:disabled{opacity:.3;cursor:not-allowed}
.field select option{background:#141428;color:var(--tx)}

/* === Minute Input === */
.minute-inp{
  width:100%;padding:13px 14px;
  font-size:15px;font-family:inherit;font-weight:500;
  color:var(--tx);background:rgba(20,20,36,.6);
  border:1px solid rgba(255,255,255,.06);border-radius:8px;
  text-align:center;letter-spacing:2px;
  transition:all .3s;
  -moz-appearance:textfield;
}
.minute-inp::-webkit-inner-spin-button,.minute-inp::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
.minute-inp:focus{outline:none;border-color:var(--gold);box-shadow:0 0 20px var(--gold-glow)}
.minute-inp::placeholder{color:var(--tx3);opacity:.4}
.minute-hint{display:block;font-size:10px;color:var(--tx3);opacity:.4;margin-top:4px;text-align:center}

/* === Radio Group === */
.radio-group{display:flex;gap:8px}
.radio{
  flex:1;display:flex;align-items:center;justify-content:center;
  padding:13px 8px;
  background:rgba(20,20,36,.5);border:1px solid rgba(255,255,255,.05);border-radius:8px;
  cursor:pointer;transition:all .35s;font-size:14px;color:var(--mist);
}
.radio:hover{border-color:rgba(255,255,255,.1)}
.radio input{display:none}
.radio:has(input:checked){
  border-color:var(--gold);background:rgba(201,168,76,.08);
  color:var(--gold-l);
  box-shadow:0 0 24px var(--gold-glow);
}
.radio span{pointer-events:none;letter-spacing:2px}

/* === Lunar Preview === */
.lunar-preview{
  margin-top:8px;padding:11px 16px;
  background:rgba(201,168,76,.04);border:1px solid rgba(201,168,76,.08);border-radius:8px;
  font-size:13px;color:var(--mist);text-align:center;letter-spacing:1px;
  display:none;transition:all .3s;
}
.lunar-preview.show{display:block;animation:fadeIn .3s ease-out}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

/* === Submit === */
.submit{
  width:100%;padding:16px;margin-top:12px;
  font-family:inherit;font-size:17px;font-weight:700;letter-spacing:10px;
  color:var(--ink);
  background:linear-gradient(135deg,var(--gold-d) 0%,var(--gold) 40%,var(--gold-l) 100%);
  background-size:200% 100%;
  border:none;border-radius:8px;cursor:pointer;
  transition:all .4s;
  box-shadow:0 4px 24px rgba(201,168,76,.2);
  animation:shimmer 3s ease-in-out infinite;
}
@keyframes shimmer{
  0%,100%{background-position:0% 50%}
  50%{background-position:100% 50%}
}
.submit:hover{transform:translateY(-1px);box-shadow:0 6px 32px rgba(201,168,76,.3)}
.submit:active{transform:translateY(0);box-shadow:0 2px 12px rgba(201,168,76,.15)}
.submit.loading{pointer-events:none;opacity:.65}

/* === Trust === */
.trust{display:flex;gap:16px;justify-content:center;margin-top:20px}
.trust span{font-size:11px;color:var(--tx3);letter-spacing:1px;transition:color .3s}
.trust span:hover{color:var(--tx2)}

/* === Footer === */
.footer{text-align:center;margin-top:48px}
.footer p{font-size:12px;color:var(--tx3);letter-spacing:3px;line-height:2.2}
.footer .disc{font-size:10px;opacity:.4;margin-top:4px}

/* === Ink Splash Ornaments === */
.ink-splash{
  position:fixed;pointer-events:none;z-index:0;
  border-radius:50%;filter:blur(80px);opacity:.03;
}
.ink-splash.tl{top:-120px;left:-80px;width:300px;height:300px;background:var(--gold)}
.ink-splash.br{bottom:-100px;right:-60px;width:260px;height:260px;background:var(--gold-d)}

/* === Mobile === */
@media(max-width:400px){
  .app{padding:32px 12px 48px}
  .card{padding:24px 16px 22px}
  .header h1{font-size:44px;letter-spacing:22px}
  .tagline{font-size:14px;letter-spacing:10px}
  .row{gap:10px}
  .field select{font-size:14px;padding:12px 32px 12px 12px}
}
@media(min-width:500px){
  .app{padding:56px 20px 72px}
  .card{padding:36px 32px 32px}
}