:root{
  --bg: rgb(220,187,135);
  --accent: rgb(102,72,26);
  --accent-soft: rgba(102,72,26,0.14);
  --card: rgba(255,255,255,0.82);
  --card-solid: #fffaf1;
  --line: rgba(102,72,26,0.16);
  --text: #4b3412;
  --text-soft: rgba(75,52,18,0.74);
  --shadow: 0 18px 40px rgba(102,72,26,0.18);
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 14px;
  --transition: 180ms ease;
}

*{box-sizing:border-box}

html,body{
  margin:0;
  padding:0;
  min-height:100%;
}

body{
  font-family:"Raleway", system-ui, sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top left, rgba(255,255,255,0.4), transparent 34%),
    radial-gradient(circle at bottom right, rgba(102,72,26,0.11), transparent 28%),
    linear-gradient(135deg, rgba(220,187,135,1), rgba(234,212,173,1));
}

.page-shell{
  min-height:100vh;
  display:grid;
  place-items:center;
  padding:24px;
}

.converter-card{
  position:relative;
  width:min(980px, 100%);
  background:var(--card);
  backdrop-filter: blur(10px);
  border:1px solid rgba(255,255,255,0.5);
  border-radius:32px;
  box-shadow:var(--shadow);
  padding:28px;
  overflow:hidden;
}

.card-glow{
  position:absolute;
  inset:auto -40px -80px auto;
  width:220px;
  height:220px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(102,72,26,0.16), transparent 70%);
  pointer-events:none;
}

.topbar{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:18px;
  margin-bottom:24px;
}

.eyebrow{
  margin:0 0 6px;
  font-size:0.82rem;
  font-weight:800;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--text-soft);
}

h1{
  margin:0;
  font-size:clamp(2rem, 4vw, 3rem);
  line-height:1;
}

.subtitle{
  margin:10px 0 0;
  color:var(--text-soft);
  font-size:1rem;
  max-width:48ch;
  line-height:1.5;
}

.badge{
  flex:0 0 auto;
  border:1px solid var(--line);
  background:rgba(255,255,255,0.52);
  color:var(--accent);
  font-weight:700;
  font-size:0.9rem;
  padding:10px 14px;
  border-radius:999px;
}

.converter-grid{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  gap:18px;
  align-items:center;
}

.panel{
  background:var(--card-solid);
  border:1px solid var(--line);
  border-radius:var(--radius-xl);
  padding:18px;
  box-shadow:0 10px 22px rgba(102,72,26,0.06);
}

.panel-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:14px;
}

.panel-head h2{
  margin:0;
  font-size:1.18rem;
}

.ghost-btn,
.primary-btn,
.secondary-btn,
.swap-btn{
  font-family:inherit;
  border:none;
  cursor:pointer;
  transition:transform var(--transition), box-shadow var(--transition), background var(--transition), opacity var(--transition);
}

.ghost-btn{
  background:rgba(102,72,26,0.08);
  color:var(--accent);
  border:1px solid rgba(102,72,26,0.10);
  padding:10px 12px;
  border-radius:12px;
  font-weight:700;
}

.ghost-btn:hover,
.secondary-btn:hover,
.primary-btn:hover,
.swap-btn:hover{
  transform:translateY(-1px);
}

.input-label{
  display:block;
  font-size:0.92rem;
  font-weight:700;
  margin:14px 0 8px;
}

.input-wrap,
.select-wrap{
  position:relative;
}

.input-wrap input,
.select-wrap select{
  width:100%;
  border:1px solid var(--line);
  background:white;
  color:var(--text);
  border-radius:16px;
  padding:16px 16px;
  font:inherit;
  font-size:1rem;
  outline:none;
  transition:border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.input-wrap input:focus,
.select-wrap select:focus{
  border-color:rgba(102,72,26,0.4);
  box-shadow:0 0 0 4px rgba(102,72,26,0.10);
}

.output-wrap input{
  font-weight:700;
}

.center-actions{
  display:grid;
  justify-items:center;
  gap:12px;
}

.swap-btn{
  width:72px;
  height:72px;
  border-radius:50%;
  background:linear-gradient(180deg, rgba(102,72,26,1), rgba(82,58,20,1));
  color:white;
  box-shadow:0 14px 28px rgba(102,72,26,0.25);
  font-size:1.6rem;
  font-weight:800;
}

.swap-btn span{
  display:inline-block;
  transform:translateY(-1px);
}

.helper-text{
  margin:0;
  color:var(--text-soft);
  font-size:0.9rem;
  text-align:center;
}

.action-row{
  display:flex;
  gap:12px;
  margin-top:18px;
  flex-wrap:wrap;
}

.primary-btn,
.secondary-btn{
  padding:14px 18px;
  border-radius:16px;
  font-size:1rem;
  font-weight:800;
}

.primary-btn{
  background:var(--accent);
  color:white;
  box-shadow:0 10px 20px rgba(102,72,26,0.22);
}

.secondary-btn{
  background:rgba(255,255,255,0.7);
  color:var(--accent);
  border:1px solid var(--line);
}

.info-panel{
  margin-top:18px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}

.info-item{
  padding:16px 18px;
  border-radius:18px;
  background:rgba(255,255,255,0.58);
  border:1px solid var(--line);
}

.info-label{
  display:block;
  font-size:0.85rem;
  font-weight:800;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--text-soft);
  margin-bottom:6px;
}

@media (max-width: 860px){
  .converter-grid{
    grid-template-columns:1fr;
  }

  .center-actions{
    order:2;
    margin:2px 0;
  }

  .swap-btn{
    width:64px;
    height:64px;
  }

  .info-panel{
    grid-template-columns:1fr;
  }
}

@media (max-width: 560px){
  .page-shell{
    padding:12px;
  }

  .converter-card{
    border-radius:24px;
    padding:18px;
  }

  .topbar{
    flex-direction:column;
    align-items:flex-start;
  }

  .badge{
    padding:8px 12px;
  }

  .action-row{
    display:grid;
    grid-template-columns:1fr 1fr;
  }

  .primary-btn,
  .secondary-btn{
    width:100%;
  }
}