.mode-seg {
  display: inline-flex;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 4px;
  gap: 2px;
}

.mode-seg button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: var(--step-sm);
  font-weight: 500;
  color: var(--ink-2);
  transition: all 0.2s var(--ease);
}

.mode-seg button svg {
  width: 16px;
  height: 16px;
  opacity: 0.6;
}

.mode-seg button.on {
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow);
  font-weight: 600;
}

.mode-seg button.on svg {
  opacity: 1;
  color: var(--accent-strong);
}

.conv-toolbar {
  display: flex;
  align-items: flex-end;
  gap: var(--s4);
  flex-wrap: wrap;
  margin-bottom: var(--s5);
}

.conv-toolbar .field {
  flex: 1;
  min-width: 200px;
}

.ref-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: 0 4px 12px oklch(0 0 0 / 0.03);
}

.ref-head {
  padding: var(--s4) var(--s5);
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ref-head h3 {
  font-size: var(--step-sm);
  font-weight: 700;
  margin: 0;
}

.ref-head .badge {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--accent-strong);
  background: var(--accent-dim);
  padding: 4px 10px;
  border-radius: 20px;
}

.ref-scroll {
  max-height: 380px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.ref-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--step-sm);
}

.ref-table th {
  position: sticky;
  top: 0;
  z-index: 10;
  text-align: left;
  font-size: var(--step-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-3);
  padding: 12px var(--s5);
  border-bottom: 1px solid var(--border-soft);
  background: var(--surface-2);
}

.ref-table td {
  padding: 12px var(--s5);
  border-bottom: 1px solid var(--border-soft);
  font-variant-numeric: tabular-nums;
}

.ref-table tr:last-child td {
  border-bottom: none;
}

.ref-table tbody tr:hover {
  background: var(--surface-2);
}

.conv-breakdown {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: var(--s4);
}

.bd-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px var(--s3);
  border-radius: var(--r-sm);
  font-size: var(--step-sm);
  background: var(--surface-2);
  border: 1px solid transparent;
  transition: border-color 0.2s;
}

.bd-row:hover {
  border-color: var(--border);
}

.bd-row .bd-name {
  color: var(--ink-2);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bd-row .bd-qp {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--accent-strong);
  font-variant-numeric: tabular-nums;
}

.rev-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, min-max(180px, 1fr));
  gap: var(--s4);
}

.rev-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: var(--s5);
  transition: transform 0.2s var(--ease), border-color 0.2s;
}

.rev-card:hover {
  transform: translateY(-2px);
  border-color: var(--ink-3);
}

.rev-card .sys {
  font-size: var(--step-xs);
  font-weight: 700;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.rev-card .val {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--step-lg);
  color: var(--accent-strong);
  margin: 6px 0;
  font-variant-numeric: tabular-nums;
}

.rev-card .desc {
  font-size: var(--step-xs);
  color: var(--ink-2);
}

.rev-input-big {
  text-align: center;
  padding: var(--s8) var(--s5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
}

.rev-input-big label {
  display: block;
  font-size: var(--step-md);
  font-weight: 600;
  margin-bottom: var(--s4);
  color: var(--ink-2);
}

.rev-input-big input {
  max-width: 100%;
  width: 220px;
  text-align: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 3.5rem;
  padding: 10px;
  background: transparent;
  border: none;
  border-bottom: 4px solid var(--border-soft);
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  transition: border-color 0.3s var(--ease);
}

.rev-input-big input:focus {
  outline: none;
  border-bottom-color: var(--accent);
}

.rev-input-big .scalemax {
  font-size: var(--step-sm);
  color: var(--ink-3);
  margin-top: var(--s3);
  font-weight: 500;
}

.hidden {
  display: none !important;
}

#report {
  display: none;
}

@media print {
  body > *:not(#report) {
    display: none !important;
  }
  #report {
    display: block !important;
    padding: 0;
    background: #fff;
  }
  @page {
    margin: 15mm;
  }
  * {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}

@media (max-width: 480px) {
  .rev-input-big input {
    font-size: 2.5rem;
    width: 160px;
  }
}

/* ── GPA Converter Premium Overrides ── */
body.premium .conv-ref { background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.07); border-radius: 16px; }
body.premium #refBody tr:hover td { background: rgba(124,58,237,.08); }
body.premium #refBody td, body.premium .ref-table th { border-color: rgba(255,255,255,.05); color: var(--p-ink-2); }
body.premium .breakdown { background: transparent; }
body.premium .bd-row { border-bottom: 1px solid rgba(255,255,255,.04); }
body.premium .bd-name { color: var(--p-ink-2); }
body.premium .bd-qp { color: #a78bfa; font-weight: 600; }
body.premium #gpaOut { 
  background: linear-gradient(135deg,#fff,#a78bfa);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}