/* ── Peach flavor tokens (local aliases) ─────────────────── */
:root {
  --fl-bg:     var(--c-peach-bg);
  --fl-border: var(--c-peach-border);
  --fl-text:   var(--c-peach-text);
}

/* ── Hero ────────────────────────────────────────────────── */
.app-hero {
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem 1.1rem;
}
.app-hero--peach {
  background: var(--fl-bg);
  border-bottom-color: var(--fl-border);
}
.app-hero__inner { margin: 0 auto; }
.app-hero__title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--fl-text);
  letter-spacing: -.02em;
  margin: 0 0 .5rem;
  line-height: 1.2;
}
.app-hero__desc {
  font-size: .9rem;
  color: var(--color-text-secondary);
  max-width: 660px;
  line-height: 1.6;
  margin: 0 0 .85rem;
}
.app-hero__chips { display: flex; flex-wrap: wrap; gap: .35rem; }
.hero-chip {
  display: inline-flex; align-items: center;
  padding: .22rem .65rem; font-size: .72rem; font-weight: 700;
  background: var(--color-surface); border: 1.5px solid var(--fl-border);
  border-radius: var(--radius-full); color: var(--fl-text); white-space: nowrap;
}

/* ── Layout ──────────────────────────────────────────────── */
.app-wrap {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  padding: 1.5rem 1rem 3rem;
}

.pane-in {
  width: 320px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.pane-out {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--fl-border);
  border-radius: var(--radius-xl);
  padding: 1rem 1.125rem;
}

.card-title {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--fl-text);
  margin: 0 0 .75rem;
}

/* ── Form elements ───────────────────────────────────────── */
.field { margin-bottom: .75rem; }
.field:last-child { margin-bottom: 0; }

label.lbl {
  display: block;
  font-size: .72rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: .28rem;
}

input.num-in, select.sel {
  width: 100%;
  box-sizing: border-box;
  padding: .4rem .6rem;
  font-size: .8rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text-primary);
  transition: border-color .15s;
}
input.num-in:focus, select.sel:focus {
  outline: none;
  border-color: var(--c-peach-text);
}

/* ── Preset buttons (unit toggle / temp presets) ─────────── */
.preset-row {
  display: flex;
  gap: .35rem;
  flex-wrap: wrap;
  margin-bottom: .5rem;
}
.preset-row button, .unit-toggle button {
  padding: .28rem .65rem;
  font-size: .73rem;
  font-weight: 600;
  background: var(--color-bg);
  border: 1.5px solid var(--fl-border);
  border-radius: var(--radius-full);
  color: var(--fl-text);
  cursor: pointer;
  transition: background .15s, color .15s;
}
.preset-row button.active,
.unit-toggle button.active {
  background: var(--fl-bg);
  color: var(--fl-text);
  border-color: var(--c-peach-text);
}
.preset-row button:hover,
.unit-toggle button:hover {
  background: var(--fl-bg);
}

.unit-toggle {
  display: flex;
  border: 1.5px solid var(--fl-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: .75rem;
}
.unit-toggle button {
  flex: 1;
  border: none;
  border-radius: 0;
  border-right: 1px solid var(--fl-border);
}
.unit-toggle button:last-child { border-right: none; }

/* ── Input row with unit label ───────────────────────────── */
.input-row {
  display: flex;
  align-items: center;
  gap: .5rem;
}
.input-row input { flex: 1; }
.input-row .unit {
  font-size: .78rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  min-width: 28px;
}

/* ── Results card ────────────────────────────────────────── */
.result-hero {
  background: var(--fl-bg);
  border: 2px solid var(--fl-border);
  border-radius: var(--radius-xl);
  padding: 1.25rem 1.5rem;
  text-align: center;
}

.result-hero__label {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--fl-text);
  margin: 0 0 .3rem;
}

.result-hero__value {
  font-size: 3rem;
  font-weight: 900;
  color: var(--fl-text);
  line-height: 1;
  letter-spacing: -.03em;
}

.result-hero__sub {
  font-size: .85rem;
  color: var(--color-text-secondary);
  margin-top: .35rem;
}

/* ── Secondary result grid ───────────────────────────────── */
.result-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .75rem;
}

.result-cell {
  background: var(--color-surface);
  border: 1px solid var(--fl-border);
  border-radius: var(--radius-xl);
  padding: .85rem 1rem;
}

.result-cell__label {
  font-size: .68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--color-text-muted);
  margin: 0 0 .25rem;
}

.result-cell__value {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--fl-text);
  line-height: 1.1;
}

.result-cell__sub {
  font-size: .65rem;
  color: var(--color-text-muted);
  margin-top: .15rem;
}

/* Cross-section chip */
.cross-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-surface);
  border: 1px solid var(--fl-border);
  border-radius: var(--radius-xl);
  padding: .7rem 1rem;
  font-size: .8rem;
}
.cross-chip__label { color: var(--color-text-muted); font-weight: 600; font-size: .68rem; text-transform: uppercase; letter-spacing: .06em; }
.cross-chip__value { font-weight: 700; color: var(--fl-text); }

/* ── Standard selector note ──────────────────────────────── */
.std-note {
  font-size: .76rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  background: var(--fl-bg);
  border: 1px solid var(--fl-border);
  border-radius: var(--radius-md);
  padding: .5rem .75rem;
  margin-top: .5rem;
}

/* ── Parallel vias highlight ─────────────────────────────── */
.parallel-out {
  font-size: .82rem;
  font-weight: 700;
  color: var(--fl-text);
  margin-top: .35rem;
  padding: .4rem .65rem;
  background: var(--fl-bg);
  border: 1.5px solid var(--fl-border);
  border-radius: var(--radius-md);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 780px) {
  .app-wrap { flex-direction: column; }
  .pane-in { width: 100%; }
  .result-grid { grid-template-columns: 1fr; }
}