:root{
  --bg: #f4f4f4;
  --card: #ffffff;
  --border: #d9d9d9;
  --text: #1f1f1f;
  --muted: #555;
  --primary: #3a3a3a;
  --primary2: #2f2f2f;
  --danger: #b00020;
  --shadow: 0 10px 30px rgba(0,0,0,.06);
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.35;
}

.container{
  max-width: 980px;
  margin: 28px auto;
  padding: 0 16px;
}

.header .subtitle{
  color: var(--muted);
  margin: 6px 0 0 0;
}

.logo{
  width: 70px;
  height: auto;
  border-radius: 90px;
  display: grid;
  place-items: center;
  display: block;
}

.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  margin-top: 16px;
  box-shadow: var(--shadow);
}

h1{ font-size: 1.6rem; margin: 0; }
h2{ font-size: 1.2rem; margin: 0 0 12px 0; }
h3{ font-size: 1.05rem; margin: 0 0 12px 0; }

.grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

@media (max-width: 760px){
  .grid{ grid-template-columns: 1fr; }
}

.field{
  display:flex;
  flex-direction: column;
  gap: 6px;
}

.label{
  font-weight: 650;
}

.hint{
  color: var(--muted);
  font-size: .85rem;
}

input, select{
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
  outline: none;
  font-size: 1rem; /* lisible */
}

input:focus, select:focus{
  border-color: #9a9a9a;
  box-shadow: 0 0 0 3px rgba(0,0,0,.08);
}

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

.btn{
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 650;
}

.btn.primary{
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.btn.primary:hover{ background: var(--primary2); }

.btn:hover{
  transform: translateY(-1px);
}

.btn:active{
  transform: translateY(0);
}

.btn.danger{
  border-color: rgba(176,0,32,.35);
  color: var(--danger);
  background: rgba(176,0,32,.05);
}

.result{
  margin-top: 14px;
  border: 1px dashed var(--border);
  border-radius: 14px;
  padding: 14px;
  background: #fbfbfb;
}

.result-grid{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

@media (max-width: 760px){
  .result-grid{ grid-template-columns: 1fr; }
}

.metric{
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  padding: 12px;
}

.metric-label{
  color: var(--muted);
  font-size: .92rem;
  margin-bottom: 6px;
}

.metric-value{
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: .2px;
}

.note{
  color: var(--muted);
  margin: 10px 0 0 0;
  font-size: .92rem;
}

.card-head{
  display:flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.history{
  display:flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}

.history-item{
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  padding: 12px;
}

.history-top{
  display:flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.history-title{
  font-weight: 800;
}

.history-meta{
  color: var(--muted);
  font-size: .9rem;
}

.history-values{
  margin-top: 8px;
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--text);
}

.pill{
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 10px;
  background: #fafafa;
  font-weight: 650;
}

.empty{
  margin-top: 14px;
  color: var(--muted);
}

.footer{
  margin: 18px 0 28px 0;
  color: var(--muted);
}