:root {
  --tile-blue: #2998ff;
  --tile-sky: #79c5fb;
  --tile-coral: #ff7f70;
  --tile-mint: #62cfa8;
}

.breadcrumbs,
.field-note,
.site-footer { color: #536174; }
.calculator-grid { align-items: stretch; }
.input-card,
.tile-result { height: 100%; }
.tile-fields { gap: 18px 14px; }
.field-error { min-height: 14px; display: block; }
.range { height: 44px; margin: -7px 0 -7px; }
[hidden] { display: none !important; }
.result-a11y-status {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.tile-mode {
  margin-bottom: 22px;
  padding: 4px;
  border: 1px solid #dce3ec;
  border-radius: 18px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  background: #e9edf2;
}
.tile-mode button {
  min-height: 45px;
  padding: 8px 10px;
  border: 0;
  border-radius: 14px;
  color: #56657a;
  background: transparent;
  font: inherit;
  font-size: 11px;
  font-weight: 850;
  cursor: pointer;
}
.tile-mode button[aria-pressed="true"] {
  color: #0a203f;
  background: #fff;
  box-shadow: 0 4px 12px rgba(15,37,66,.1);
}
.mode-note { margin: -6px 0 18px; color: #69768a; font-size: 11px; line-height: 1.45; }

.openings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.opening-card { padding: 14px; border: 1px solid #dbe1e9; border-radius: 16px; background: #fff; }
.opening-head { margin-bottom: 11px; display: flex; justify-content: space-between; gap: 8px; }
.opening-head strong { color: #0b203f; font-size: 13px; }
.opening-head span { color: #7b8799; font-size: 9px; }
.mini-inputs { display: grid; grid-template-columns: .8fr 1fr 1fr; gap: 6px; }
.mini-inputs label { min-width: 0; color: #68758a; font-size: 9px; font-weight: 750; }
.mini-inputs input {
  width: 100%;
  min-width: 0;
  height: 44px;
  margin-top: 6px;
  padding: 0 10px;
  box-sizing: border-box;
  border: 1px solid #d3d9e2;
  border-radius: 11px;
  color: #0b203f;
  background: #fff;
  font: inherit;
  font-size: 13px;
  font-weight: 750;
}
.mini-inputs input:focus { border-color: var(--tile-blue); outline: 3px solid rgba(41,152,255,.12); }
.mini-inputs input[aria-invalid="true"] { border-color: #d54b40; box-shadow: 0 0 0 3px rgba(213,75,64,.11); }
.opening-input-error {
  display: block;
  min-height: 0;
  margin-top: 4px;
  color: #b12e25;
  font-size: 8px;
  line-height: 1.4;
}
.opening-input-error:empty { display: none; }
.subtract-toggle {
  grid-column: 1 / -1;
  padding: 13px;
  border: 1px solid #dbe1e9;
  border-radius: 15px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: #f8fbff;
  cursor: pointer;
}
.subtract-toggle input { width: 18px; height: 18px; margin-top: 1px; accent-color: var(--tile-blue); }
.subtract-toggle span { min-width: 0; display: grid; gap: 4px; }
.subtract-toggle strong { color: #0b203f; font-size: 11px; }
.subtract-toggle small { color: #667388; font-size: 9px; line-height: 1.45; }

.tile-result {
  background:
    radial-gradient(circle at 100% 0, rgba(98,207,168,.16), transparent 34%),
    linear-gradient(155deg, #071b38 0%, #0e345f 100%);
}
.tile-result .result-value { display: flex; align-items: baseline; gap: 10px; }
.tile-result .result-value small { font-size: .32em; font-weight: 750; letter-spacing: 0; text-transform: lowercase; }
.tile-result .primary { background: #0877e6; }
.tile-result .result-actions button { border-color: var(--tile-coral); color: #071b38; background: var(--tile-coral); }

.tile-visual-section { margin-top: 22px; padding: 21px 0 18px; border-top: 1px solid rgba(255,255,255,.15); border-bottom: 1px solid rgba(255,255,255,.15); }
.tile-visual {
  min-height: 220px;
  padding: 14px;
  border-radius: 18px;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  align-content: center;
  gap: 5px;
  overflow: hidden;
  background: rgba(255,255,255,.06);
  transition: opacity .42s ease, transform .58s cubic-bezier(.22,1,.36,1);
}
.tile-visual.is-waiting { opacity: .001; transform: translateY(24px); }
.tile-visual.is-building { opacity: 1; transform: translateY(0); }
.tile-piece {
  aspect-ratio: 1;
  min-width: 0;
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 5px;
  display: grid;
  place-items: center;
  color: rgba(255,255,255,.88);
  background:
    linear-gradient(135deg, rgba(255,255,255,.18), transparent 50%),
    linear-gradient(145deg, rgba(41,152,255,.86), rgba(41,152,255,.34));
  box-shadow: inset 0 0 12px rgba(255,255,255,.06);
  font-size: 8px;
  font-weight: 850;
  transform-origin: center;
  animation: tilePlace .42s both cubic-bezier(.22,1,.36,1);
}
.tile-piece:nth-child(4n) { background: linear-gradient(145deg, rgba(98,207,168,.72), rgba(41,152,255,.28)); }
.tile-piece:nth-child(7n) { background: linear-gradient(145deg, rgba(255,127,112,.66), rgba(41,152,255,.24)); }
.tile-visual.is-waiting .tile-piece {
  opacity: 0;
  transform: translateY(18px) scale(.72);
  animation-play-state: paused;
}
.tile-visual.is-building .tile-piece { animation-play-state: running; }
.tile-more {
  aspect-ratio: 1;
  border: 1px dashed rgba(255,255,255,.36);
  border-radius: 5px;
  display: grid;
  place-items: center;
  color: #fff;
  background: rgba(255,255,255,.07);
  font-size: 10px;
  font-weight: 850;
}
@keyframes tilePlace {
  from { opacity: 0; transform: translateY(18px) scale(.72); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.tile-metrics { margin: 14px 0 0; }
.tile-metrics > div {
  min-height: 50px;
  border-bottom: 1px solid rgba(255,255,255,.12);
  display: grid;
  grid-template-columns: minmax(0,1fr) auto;
  align-items: center;
  gap: 18px;
}
.tile-metrics dt {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 9px;
  color: rgba(255,255,255,.7);
  font-size: 12px;
}
.tile-metrics dd {
  margin: 0;
  color: #fff;
  text-align: right;
  font-size: 14px;
  font-weight: 850;
  white-space: nowrap;
}
.metric-dot { width: 9px; height: 9px; border-radius: 50%; }
.metric-dot.surface { background: var(--tile-blue); }
.metric-dot.opening { background: var(--tile-sky); }
.metric-dot.total { background: #fff; box-shadow: 0 0 0 5px rgba(255,255,255,.09); }
.total-metric dt,
.total-metric dd { color: #fff; }
.result-note {
  margin-top: 16px;
  padding: 13px 14px;
  border-left: 2px solid var(--tile-blue);
  color: rgba(255,255,255,.82);
  background: rgba(255,255,255,.08);
  font-size: 10px;
  line-height: 1.45;
}

.tile-breakdown { overflow: visible; }
.formula-summary { margin-top: 14px; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 10px; }
.formula-summary > div { padding: 16px; border-radius: 17px; background: #edf5ff; }
.formula-summary span,
.formula-summary strong,
.formula-summary small { display: block; }
.formula-summary span { color: #5f6f86; font-size: 10px; }
.formula-summary strong { margin-top: 4px; color: #0a203f; font-size: 18px; overflow-wrap: anywhere; }
.formula-summary small { margin-top: 6px; color: #758298; font-size: 9px; line-height: 1.35; }
.program-back-to-calculator {
  position: fixed;
  right: max(16px, calc((100vw - 1180px) / 2));
  bottom: 14px;
  margin: 0;
  opacity: 0;
  transform: translateY(12px);
  visibility: hidden;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease, visibility .2s;
}
.program-back-to-calculator.is-visible { opacity: 1; transform: translateY(0); visibility: visible; pointer-events: auto; }

@media (max-width: 900px) {
  .formula-summary { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 620px) {
  .tile-mode button { font-size: 10px; }
  .openings-grid { grid-template-columns: 1fr; }
  .mini-inputs { grid-template-columns: 1fr 1fr 1fr; }
  .tile-visual { min-height: 188px; grid-template-columns: repeat(5,minmax(0,1fr)); }
  .formula-summary { grid-template-columns: 1fr; }
  .program-schedule-actions #programSaveButton,
  .program-schedule-actions #programSavedButton,
  .program-schedule-actions #programPrintButton,
  .program-schedule-actions #programPdfButton { display: inline-flex; }
  .program-schedule-actions button { min-height: 44px; }
  .program-back-to-calculator { right: 12px; bottom: 12px; }
}

@media print {
  .site-header,
  .breadcrumbs,
  .hero,
  .input-card,
  .program-back-to-calculator,
  .result-actions,
  .program-schedule-actions,
  .seo-content,
  .site-footer { display: none !important; }
  .page,
  .calculator-grid { width: 100%; margin: 0; display: block; }
  .tile-result,
  .tile-breakdown { margin: 0 0 18px; break-inside: avoid; color: #000; background: #fff; box-shadow: none; }
  .tile-result * { color: #000 !important; }
}

@media (prefers-reduced-motion: reduce) {
  .tile-visual,
  .tile-piece,
  .program-back-to-calculator { animation: none; transition: none; }
}