:root{
  --blue: #00A9E0;
  --blue-deep: #0B2A3C;
  --green: #2DBE60;
  --white: #fff;
  --text: #0b1b2a;

  --panel: #F7F8FA;
  --road: #C7CED6;

  --type: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --bg-grad: rgb(215, 213, 213);
  --card-grad: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(255,255,255,0.90));
  --label-grad: linear-gradient(180deg, rgba(11,42,60,0.16), rgba(11,42,60,0.10));

  --shadow-soft: 0 14px 34px rgba(11,42,60,0.18);
  --shadow-card: 0 16px 42px rgba(11,42,60,0.12);
  --shadow-chip: 0 10px 22px rgba(11,42,60,0.10);

  --radius: 14px;
  --radius-sm: 12px;
  --border: 3px solid var(--blue-deep);
  --border-soft: 2px solid rgba(11,42,60,0.18);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: var(--type);
  font-size: 15px;
  color: var(--text);
  background: var(--bg-grad);
  overflow-x:hidden;
  letter-spacing: 0.1px;
}

a{ color: inherit; }

.wrap{
  width: min(1260px, 92vw);
  margin: 0 auto;
  padding: 18px 0 44px;
}

.card{
  border-radius: var(--radius);
  border: 3px solid var(--blue-deep);
  background: var(--card-grad);
  padding: 18px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.card::before{
  content:"";
  position:absolute;
  right:-60px;
  top:-60px;
  width:200px;
  height:200px;
  border-radius:999px;
  background: radial-gradient(circle at 30% 30%, rgba(255,211,77,0.22), transparent 60%);
  pointer-events:none;
}

header.card{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  background: linear-gradient(180deg, rgba(0,169,224,1), rgba(0,169,224,0.92));
  border: 3px solid var(--blue-deep);
  box-shadow: 0 14px 34px rgba(11,42,60,0.18);
  color: var(--white);
}


.title h1{
  margin:0;
  font-size: 22px;
  font-weight: 950;
  letter-spacing: .2px;
  line-height: 1.1;
  color: var(--white);
}
.sub{
  margin:6px 0 0;
  font-size: 13px;
  font-weight: 800;
  color: rgba(255,255,255,0.92);
}

.grid{
  margin-top:16px;
  display:flex;
  flex-direction: column;
  gap: 16px;
}
@media(max-width:900px){
  .grid{ grid-template-columns:1fr; }
  header.card{ flex-direction:column; align-items:flex-start; }
}


.actions{ display:flex; gap:10px; flex-wrap:wrap; }

.btn{
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0,0,0,0.10);
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(255,255,255,0.90));
  color: var(--blue);
  padding: 10px 14px;
  cursor:pointer;
  font-weight: 950;
  box-shadow: 0 10px 18px rgba(11,42,60,0.08);
}
.btn:hover{ filter: brightness(1.02); }

.btn.primary{
  background: linear-gradient(180deg, rgba(0,169,224,1), rgba(0,169,224,0.86));
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.45);
  box-shadow: 0 12px 24px rgba(0,169,224,0.20);
  margin-top: 8px;
}
.btn:disabled{
  opacity:.55;
  cursor:not-allowed;
  filter: grayscale(0.1);
}

.kv{
  display:grid;
  grid-template-columns: 110px 1fr;
  gap:10px 12px;
  margin-top:10px;
}
.k{
  font-size: 13px;
  font-weight: 900;
  color: rgba(11,27,42,0.70);
}
.v{
  font-size: 13px;
  font-weight: 800;
  color: rgba(11,27,42,0.92);
}

.chips{ display:flex; flex-wrap:wrap; gap:8px; }
.chip{
  padding: 7px 10px;
  border-radius: 999px;
  border: 2px solid rgba(11,42,60,0.18);
  background: rgba(255,255,255,0.92);
  box-shadow: var(--shadow-chip);
  font-size: 12px;
  font-weight: 900;
  color: var(--blue-deep);
}

.label{
  display:block;
  margin-top:12px;
  margin-bottom:6px;
  font-size: 13px;
  font-weight: 950;
  color: rgba(11,27,42,0.70);
}
.input{
  width:100%;
  padding: 11px 12px;
  border-radius: var(--radius-sm);
  border: var(--border-soft);
  background: rgba(255,255,255,0.92);
  color: rgba(11,27,42,0.92);
  outline:none;
  font-weight: 800;
}
.input:focus{
  border-color: rgba(0,169,224,0.55);
  box-shadow: 0 0 0 4px rgba(0,169,224,0.16);
}

.divider{
  height: 1px;
  background: rgba(11,42,60,0.18);
  margin: 16px 0;
}

.code{
  background: rgba(255,255,255,0.86);
  border: 2px solid rgba(11,42,60,0.18);
  border-radius: var(--radius-sm);
  padding: 12px;
  min-height: 130px;
  overflow:auto;
  font-size: 12px;
  line-height: 1.35;

  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.row{ margin-top:10px; display:flex; gap:10px; flex-wrap:wrap; }

.small{ margin-top:10px; font-size:12px; }
.muted{ color: rgba(11,27,42,0.70); }
.hint{ margin-top:10px; color: rgba(11,27,42,0.70); font-size:12px; }

.grid > .card.demo { grid-column: 1 / -1; }
.grid > .card.demo .input,
.grid > .card.demo .btn { margin-top: 0; }
#demoResult{ min-height: 160px; }