:root {
  --fl-bg:     var(--c-lavender-bg);
  --fl-border: var(--c-lavender-border);
  --fl-text:   var(--c-lavender-text);
  --fl-mid:    #7c5fd6;
  --fl-dark:   #341a70;
}

.app-hero {
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem 1.1rem;
}
.app-hero--lavender {
  background: var(--fl-bg);
  border-bottom-color: var(--fl-border);
}
.app-hero__inner { max-width: 1100px; 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;
}

.app-wrap {
  display: flex; gap: 1.5rem; align-items: flex-start;
  max-width: 1100px; margin: 0 auto; padding: 1.5rem 1rem 3rem;
}

/* ---- LEFT PANE ---- */
.pane-in {
  width: 340px; flex-shrink: 0;
  display: flex; flex-direction: column; gap: 1rem;
}

.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;
}

.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);
  transition: border-color .15s;
}
select.sel:focus, input.num-in:focus { outline: none; border-color: var(--fl-mid); }

.dim-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; }

/* Toggles */
.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; padding: .32rem .5rem; font-size: .74rem; font-weight: 600;
  background: none; border: none; cursor: pointer; color: var(--color-text-muted);
  transition: background .15s, color .15s;
}
.unit-toggle button.active { background: var(--fl-bg); color: var(--fl-text); }

/* Advanced disclosure */
.adv {
  background: var(--color-surface); border: 1px solid var(--fl-border);
  border-radius: var(--radius-xl); padding: .7rem 1.125rem;
}
.adv > summary {
  font-size: .7rem; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--fl-text); cursor: pointer;
}
.adv-body { margin-top: .85rem; }

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

.result-hero {
  display: flex; gap: 1.25rem; align-items: stretch;
  background: var(--color-surface); border: 1px solid var(--fl-border);
  border-radius: var(--radius-xl); padding: 1.25rem;
}
.tilt-big {
  flex-shrink: 0; min-width: 160px; text-align: center;
  background: var(--fl-bg); border: 1px solid var(--fl-border);
  border-radius: var(--radius-lg); padding: 1rem 1.25rem;
  display: flex; flex-direction: column; justify-content: center;
}
.tilt-num { font-size: 3rem; font-weight: 800; color: var(--fl-dark); line-height: 1; }
.tilt-lbl {
  font-size: .75rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: .05em; color: var(--fl-text); margin-top: .3rem;
}
.verdict {
  margin-top: .6rem; padding: .25rem .5rem; border-radius: var(--radius-md);
  font-size: .72rem; font-weight: 700; line-height: 1.3;
}
.verdict--ok { background: var(--color-success-subtle); color: var(--color-success); }
.verdict--no { background: var(--color-danger-subtle); color: var(--color-danger); }

.stats-grid {
  flex: 1; display: grid; grid-template-columns: repeat(3, 1fr);
  gap: .6rem; align-content: start;
}
.stat-cell {
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: .5rem .6rem;
}
.stat-lbl {
  font-size: .64rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: .05em; color: var(--color-text-muted); margin-bottom: .15rem;
}
.stat-val { font-size: 1.5rem; font-weight: 800; color: var(--fl-dark); line-height: 1; }
.stat-val.sm { font-size: 1.05rem; }

.advice {
  margin: 0; padding: .7rem 1rem; font-size: .84rem; line-height: 1.55;
  background: var(--fl-bg); border: 1px solid var(--fl-border);
  border-radius: var(--radius-lg); color: var(--fl-text);
}

/* Drawings */
.viz-card {
  background: var(--color-surface); border: 1px solid var(--fl-border);
  border-radius: var(--radius-xl); padding: 1rem 1.125rem;
}
.viz-wrap { overflow-x: auto; }
.viz-wrap svg { display: block; width: 100%; height: auto; }
.viz-note { font-size: .72rem; color: var(--color-text-muted); margin: .6rem 0 0; }

.d-wedge { fill: var(--fl-mid); fill-opacity: .18; }
.d-plane { stroke: var(--fl-dark); stroke-width: 2; }
.d-hinge-line { stroke: var(--color-text-muted); stroke-width: 1; stroke-dasharray: 3 3; }
.d-lens { fill: var(--fl-dark); }
.d-hinge { fill: var(--fl-mid); }
.d-subject { fill: var(--color-surface); stroke: var(--fl-dark); stroke-width: 2; }
.d-grid { stroke: var(--color-border); stroke-width: 1; }
.d-axis { stroke: var(--color-border); stroke-width: 1.5; }
.d-limit { stroke: var(--color-danger); stroke-width: 1.5; stroke-dasharray: 5 4; }
.d-curve { fill: none; stroke: var(--fl-mid); stroke-width: 2.5; }
.d-lbl { font-size: 10px; font-weight: 600; fill: var(--color-text-muted); }
.d-lbl--end { text-anchor: end; }
.d-lbl--mid { text-anchor: middle; }

.empty-msg { color: var(--color-text-muted); font-size: .82rem; font-style: italic; text-align: center; padding: 1.5rem 0; }

.learn-more{max-width:820px;margin:1.25rem auto 0;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:1.1rem 1.5rem}
.learn-more-title{font-size:1.1rem;font-weight:800;color:var(--fl-text);margin:0 0 .75rem}
.learn-more h3{font-size:1rem;font-weight:800;color:var(--color-text-primary);margin:1.1rem 0 .5rem}
.learn-more p{font-size:.88rem;line-height:1.65;color:var(--color-text-secondary);margin:0 0 .75rem}
.learn-more a{color:var(--fl-text)}
.learn-more code{font-size:.82rem;background:var(--fl-bg);padding:.05rem .3rem;border-radius:var(--radius-sm)}
.learn-more .faq-item{margin-bottom:.75rem}
.learn-more .faq-q{font-size:.88rem;font-weight:700;color:var(--color-text-primary);margin:0 0 .25rem}
.learn-more-meta{font-size:.72rem;color:var(--color-text-muted);margin-top:1rem}

@media (max-width: 820px) {
  .app-wrap { flex-direction: column; }
  .pane-in { width: 100%; }
  .result-hero { flex-direction: column; align-items: stretch; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}