:root{
  --bg:#0b1220;
  --text:#eaf0ff;
  --muted:rgba(234,240,255,.72);
  --line:rgba(255,255,255,.12);
  --card:rgba(255,255,255,.06);
  --card2:rgba(255,255,255,.08);
  --blue:#3b82f6;
  --blue2:#60a5fa;
  --shadow:0 20px 60px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(900px 500px at 20% 10%, rgba(59,130,246,.22), transparent 60%),
    radial-gradient(800px 500px at 80% 20%, rgba(96,165,250,.16), transparent 55%),
    linear-gradient(180deg, var(--bg), #070b14 70%);
}

.wrap{max-width:1100px;margin:0 auto;padding:28px 18px 44px}
h1{margin:0 0 8px;font-size:38px;letter-spacing:-.6px}
.muted{color:var(--muted);font-size:14px;line-height:1.55}

.pill{
  display:inline-block;
  padding:4px 10px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(59,130,246,.12);
  font-size:12px;
  vertical-align:middle;
}

.card, form.card{
  background: linear-gradient(180deg, var(--card), rgba(255,255,255,0.03));
  border:1px solid var(--line);
  border-radius:18px;
  padding:18px;
  margin:14px 0;
  box-shadow:var(--shadow);
}

h2{
  margin:26px 0 12px;
  font-size:16px;
  letter-spacing:-.2px;
  padding-top:18px;
  border-top:1px solid var(--line);
}
.card h2:first-child{margin-top:0;border-top:none;padding-top:0}

.grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}

label{
  display:block;
  margin:14px 0 8px;
  font-size:13px;
  font-weight:700;
  color:rgba(234,240,255,.78);
}

input, select, textarea{
  width:100%;
  padding:12px 12px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(15,26,51,.65);
  color:var(--text);
  outline:none;
}

textarea{min-height:110px;resize:vertical}

input:focus, select:focus, textarea:focus{
  border-color: rgba(96,165,250,.65);
  box-shadow: 0 0 0 4px rgba(96,165,250,.18);
}

.dist-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:10px;
  margin-top:10px;
}

.btns{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-top:14px;
}

button{
  padding:12px 14px;
  border-radius:14px;
  border:1px solid rgba(96,165,250,.35);
  background: linear-gradient(135deg, rgba(59,130,246,.95), rgba(96,165,250,.85));
  color:#061028;
  font-weight:800;
  cursor:pointer;
  transition: transform .08s ease, filter .2s ease;
}

button:hover{filter:brightness(1.05)}
button:active{transform:translateY(1px)}
button:disabled{opacity:.6;cursor:not-allowed}

.msg{margin-top:10px;font-size:13px;color:var(--muted)}
.total{
  margin-top:12px;
  font-size:20px;
  font-weight:900;
}
#total{color:rgba(234,240,255,.95)}
#hddHint{color:rgba(234,240,255,.62)}

@media (max-width:900px){
  h1{font-size:32px}
  .grid{grid-template-columns:1fr}
  .dist-grid{grid-template-columns:repeat(2,1fr)}
}

.layout{
  display:grid;
  grid-template-columns: 1.65fr 1fr;
  gap: 16px;
  align-items:start;
  margin-top: 14px;
}

.summary{
  position: sticky;
  top: 84px;
}

@media (max-width: 980px){
  .layout{grid-template-columns: 1fr;}
  .summary{position: static;}
}
.topbar{
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(11,18,32,0.55);
  border-bottom: 1px solid var(--line);
}

.topbar__inner{
  max-width:1100px;
  margin:0 auto;
  padding:0 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:64px;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
}

.brand__mark{
  width:14px;
  height:14px;
  border-radius:5px;
  background: linear-gradient(135deg, var(--blue), var(--blue2));
  box-shadow: 0 10px 25px rgba(59,130,246,0.35);
}

.brand__text{font-weight:700;letter-spacing:0.2px}

.nav{display:flex;gap:16px}
.nav a{
  text-decoration:none;
  color: var(--muted);
  font-weight:600;
  padding:10px 10px;
  border-radius:10px;
}
.nav a:hover{background: rgba(255,255,255,0.06); color:var(--text)}
.nav a.is-active{background: rgba(59,130,246,0.16); color:var(--text)}