/* ── Butter flavor tokens ──────────────────────────────────────── */
:root {
  --bt-bg:     #fef8cc;
  --bt-border: #ead860;
  --bt-text:   #785800;
  --bt-mid:    #b08000;
  --bt-dark:   #3a2800;
  --fl-bg:     var(--bt-bg);
  --fl-border: var(--bt-border);
  --fl-text:   var(--bt-text);
}

/* ── Hero ──────────────────────────────────────────────────────── */
.app-hero {
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem 1.1rem;
}
.app-hero--butter {
  background: var(--bt-bg);
  border-bottom-color: var(--bt-border);
}
.app-hero__inner { margin: 0 auto; }
.app-hero__title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--bt-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(--bt-border);
  border-radius: var(--radius-full);
  color: var(--bt-text);
  white-space: nowrap;
}

/* ── App layout ────────────────────────────────────────────────── */
.app-wrap {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  padding: 1.5rem 0 3rem;
}

.pane-in {
  width: 340px;
  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(--bt-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(--bt-text);
  margin: 0 0 .75rem;
}

.field { margin-bottom: .7rem; }
.field:last-child { margin-bottom: 0; }

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

select.sel, input.num-in {
  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;
}
select.sel:focus, input.num-in:focus {
  outline: none;
  border-color: var(--bt-mid);
}

.slider-row { display: flex; align-items: center; gap: .5rem; }
.slider-row input[type=range] { flex: 1; accent-color: var(--bt-mid); }
.slider-val { font-size: .75rem; font-weight: 700; color: var(--bt-text); min-width: 44px; text-align: right; }

/* ── Mode toggle ───────────────────────────────────────────────── */
.mode-toggle {
  display: flex;
  border: 1.5px solid var(--bt-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: .75rem;
}
.mode-toggle button {
  flex: 1;
  padding: .35rem .5rem;
  font-size: .76rem;
  font-weight: 600;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: background .15s, color .15s;
}
.mode-toggle button.active {
  background: var(--bt-bg);
  color: var(--bt-text);
}

/* ── Appliance list ────────────────────────────────────────────── */
.appliance-row {
  display: grid;
  grid-template-columns: 1fr 52px auto 60px;
  align-items: center;
  gap: .4rem;
  padding: .38rem 0;
  border-bottom: 1px dashed var(--color-border);
  font-size: .8rem;
}
.appliance-row:last-child { border-bottom: none; }
.appliance-row--off { opacity: .45; }

.a-check { display: flex; align-items: center; gap: .4rem; cursor: pointer; }
.a-check input { accent-color: var(--bt-mid); width: 14px; height: 14px; flex-shrink: 0; }
.a-name { font-weight: 500; color: var(--color-text-primary); }
.a-watts { font-size: .72rem; color: var(--color-text-muted); text-align: right; }
.a-hours-wrap { display: flex; align-items: center; gap: .2rem; }
.a-hours-in {
  width: 46px;
  padding: .2rem .3rem;
  font-size: .76rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text-primary);
  text-align: center;
}
.a-hours-in:focus { outline: none; border-color: var(--bt-mid); }
.a-hrs-lbl { font-size: .68rem; color: var(--color-text-muted); white-space: nowrap; }
.a-wh { font-size: .72rem; font-weight: 600; color: var(--bt-text); text-align: right; }

/* ── Result hero ───────────────────────────────────────────────── */
.result-hero {
  background: var(--bt-bg);
  border: 1px solid var(--bt-border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  text-align: center;
}
.result-big {
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--bt-dark);
  line-height: 1;
  letter-spacing: -.04em;
}
.result-unit {
  font-size: 1rem;
  font-weight: 700;
  color: var(--bt-text);
  margin-top: .2rem;
}
.result-sub {
  font-size: .8rem;
  color: var(--color-text-muted);
  margin-top: .15rem;
}
.result-stats {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 1.1rem;
}
.rs-cell { text-align: center; }
.rs-lbl { font-size: .65rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--color-text-muted); }
.rs-val { font-size: 1rem; font-weight: 800; color: var(--bt-dark); }

/* ── Targets grid ──────────────────────────────────────────────── */
.targets-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .6rem;
}
.target-cell {
  background: var(--color-surface);
  border: 1px solid var(--bt-border);
  border-radius: var(--radius-md);
  padding: .6rem .5rem;
  text-align: center;
}
.target-label { font-size: .65rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--color-text-muted); }
.target-count { font-size: 1.6rem; font-weight: 900; color: var(--bt-dark); line-height: 1.1; margin: .25rem 0 .1rem; }
.target-sub { font-size: .65rem; color: var(--color-text-muted); }

/* ── Brand comparison chart ────────────────────────────────────── */
.bc-row {
  display: grid;
  grid-template-columns: 160px 1fr 52px 72px;
  align-items: center;
  gap: .5rem;
  padding: .35rem 0;
  border-bottom: 1px dashed var(--color-border);
  font-size: .78rem;
}
.bc-row:last-child { border-bottom: none; }
.bc-label { color: var(--color-text-secondary); font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bc-bar-wrap { height: 10px; background: var(--color-border); border-radius: 5px; overflow: hidden; }
.bc-bar { height: 100%; border-radius: 5px; transition: width .3s ease; }
.bc-hours { font-weight: 700; color: var(--bt-dark); text-align: right; }
.bc-cost { font-size: .7rem; color: var(--color-text-muted); text-align: right; }

@media (max-width: 820px) {
  .app-wrap { flex-direction: column; }
  .pane-in { width: 100%; }
  .targets-grid { grid-template-columns: repeat(2, 1fr); }
  .bc-row { grid-template-columns: 120px 1fr 48px 64px; font-size: .74rem; }
}