body { display:flex; flex-direction:column; min-height:100vh; background:var(--bg); }


.tool-content { flex:1; max-width:900px; margin:0 auto; padding:2rem 1.5rem; width:100%; box-sizing:border-box; }

.cat-tabs { display:flex; flex-wrap:wrap; gap:0.4rem; margin-bottom:2rem; }
.cat-tab {
  padding:0.4rem 1rem; border-radius:20px;
  border:1px solid var(--border); background:var(--surface);
  color:var(--text-dim); font-size:0.8rem; cursor:pointer;
  font-family:inherit; transition:all 0.15s;
}
.cat-tab:hover { border-color:var(--accent); color:var(--text); }
.cat-tab.active { background:var(--accent); border-color:var(--accent); color:#fff; font-weight:600; }

.conv-panel {
  background:var(--surface); border:1px solid var(--border);
  border-radius:8px; padding:2rem; margin-bottom:1.5rem;
}
.conv-row { display:flex; align-items:flex-end; gap:1rem; flex-wrap:wrap; }
.conv-side { flex:1; min-width:180px; }
.conv-side label {
  display:block; font-size:0.7rem; color:var(--text-dim);
  margin-bottom:0.4rem; font-weight:600; letter-spacing:0.06em; text-transform:uppercase;
}
.conv-input-row { display:flex; gap:0.5rem; }
.conv-input {
  flex:1; background:var(--surface2); border:1px solid var(--border);
  border-radius:4px; padding:0.6rem 0.75rem;
  color:var(--text); font-size:1.25rem; font-family:var(--font-mono);
  outline:none; transition:border-color 0.15s; min-width:0;
}
.conv-input:focus { border-color:var(--accent); }
.conv-input[readonly] { opacity:0.85; cursor:default; }
.conv-select {
  background:var(--surface2); border:1px solid var(--border);
  border-radius:4px; padding:0.6rem 0.5rem;
  color:var(--text); font-size:0.9rem; font-family:inherit;
  outline:none; cursor:pointer; min-width:100px;
}
.conv-swap {
  flex-shrink:0; background:var(--surface2); border:1px solid var(--border);
  border-radius:50%; width:42px; height:42px;
  display:flex; align-items:center; justify-content:center;
  cursor:pointer; font-size:1.15rem; transition:all 0.15s;
  color:var(--text); margin-bottom:1px;
}
.conv-swap:hover { background:var(--accent); border-color:var(--accent); color:#fff; }

.all-units-grid {
  display:grid; grid-template-columns:repeat(auto-fill, minmax(210px, 1fr));
  gap:0.5rem;
}
.unit-row {
  display:flex; align-items:center; justify-content:space-between;
  background:var(--surface); border:1px solid var(--border);
  border-radius:6px; padding:0.5rem 0.85rem;
  cursor:pointer; transition:border-color 0.15s;
}
.unit-row:hover { border-color:var(--accent); }
.unit-row.active-unit { border-color:var(--accent); background:var(--surface2); }
.unit-name { font-size:0.82rem; color:var(--text-dim); }
.unit-val { font-size:0.92rem; font-family:var(--font-mono); color:var(--text); font-weight:600; }

.temp-note { font-size:0.78rem; color:var(--text-dim); margin-top:1rem; font-style:italic; }

/* ── Responsive ── */
@media (max-width: 600px) {
  .tool-content { padding: 1rem 0.75rem; }
  .conv-panel   { padding: 1.25rem 1rem; }
  .conv-input   { font-size: 1rem; padding: 0.5rem 0.6rem; }
  .conv-select  { min-width: 80px; padding: 0.5rem 0.35rem; font-size: 0.82rem; }
  .conv-swap    { width: 36px; height: 36px; font-size: 1rem; }
  .all-units-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
}
@media (max-width: 400px) {
  .cat-tab { padding: 0.35rem 0.7rem; font-size: 0.74rem; }
  .all-units-grid { grid-template-columns: 1fr 1fr; }
}