/* ==========================================================
   DOUGSDOGHOUSE — Calculator / Tool Pages
   ========================================================== */

.tool-hero {
  background:
    radial-gradient(ellipse 50% 60% at 90% 30%, rgba(186,229,152,.4) 0%, transparent 60%),
    linear-gradient(180deg, var(--mint-pale) 0%, var(--white) 100%);
  padding: 3.5rem 0 2rem;
  position: relative;
  overflow: hidden;
}
.tool-hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.25rem;
  text-align: center;
}
.tool-hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  margin-bottom: 1rem;
  line-height: 1.15;
}
.tool-hero h1 em {
  font-style: normal;
  color: var(--lime-deep);
  position: relative;
}
.tool-hero h1 em::after {
  content: '';
  position: absolute;
  left: 0; bottom: 4px;
  width: 100%; height: 10px;
  background: var(--mint);
  z-index: -1;
  border-radius: 6px;
}
.tool-hero-lead {
  font-size: 1.05rem;
  color: var(--gray-700);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.7;
}
.tool-hero-stats {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}
.tool-stat {
  text-align: center;
}
.tool-stat-num {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--lime-deep);
}
.tool-stat-lbl {
  font-size: .78rem;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: .04em;
  font-weight: 600;
}

/* === CALCULATOR LAYOUT === */
.calc-section {
  padding: 2rem 0 4rem;
  background: var(--white);
}
.calc-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.25rem;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2rem;
  align-items: start;
}
.calc-card {
  background: var(--white);
  border: 1.5px solid var(--gray-100);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
}
.calc-card h2 {
  font-size: 1.5rem;
  margin-bottom: .5rem;
  display: flex;
  align-items: center;
  gap: .65rem;
}
.calc-card h2::before {
  content: '';
  width: 6px;
  height: 26px;
  background: var(--lime);
  border-radius: 3px;
}
.calc-intro {
  color: var(--gray-500);
  margin-bottom: 1.75rem;
  font-size: .95rem;
}

/* unit toggle */
.unit-toggle {
  display: inline-flex;
  background: var(--gray-50);
  padding: 4px;
  border-radius: var(--radius-pill);
  margin-bottom: 1.5rem;
}
.unit-toggle button {
  padding: .5rem 1.1rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: .85rem;
  color: var(--gray-500);
  transition: all var(--transition);
  border: none;
  background: transparent;
  cursor: pointer;
}
.unit-toggle button.active {
  background: var(--lime);
  color: var(--charcoal);
  box-shadow: var(--shadow-sm);
}

/* form fields */
.input-group { margin-bottom: 1.25rem; }
.input-label {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: .85rem;
  font-weight: 700;
  color: var(--charcoal);
  margin-bottom: .5rem;
}
/* When .input-help is a span: show as small circular tooltip badge */
span.input-help {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px; height: 18px;
  background: var(--mint-soft);
  color: var(--lime-deep);
  border-radius: 50%;
  font-size: .7rem;
  font-weight: 700;
  cursor: help;
}
/* When .input-help is a div: show as helper text under input */
.input-help {
  display: block;
  font-size: 0.82rem;
  color: var(--gray-500, #6F7866);
  line-height: 1.5;
  margin-top: 0.4rem;
}
.input-control {
  width: 100%;
  padding: .85rem 1rem;
  border: 1.5px solid var(--gray-100);
  border-radius: var(--radius);
  background: var(--gray-50);
  font-weight: 500;
  outline: none;
  transition: all var(--transition);
}
.input-control:focus {
  border-color: var(--lime);
  background: var(--white);
  box-shadow: 0 0 0 4px rgba(99,200,16,.15);
}
.input-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: .75rem;
}
.option-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .65rem;
}
.option-btn {
  padding: .85rem;
  background: var(--gray-50);
  border: 1.5px solid var(--gray-100);
  border-radius: var(--radius);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  font-weight: 600;
  font-size: .9rem;
  color: var(--charcoal);
}
.option-btn:hover { border-color: var(--mint); }
.option-btn.active {
  background: var(--mint-soft);
  border-color: var(--lime);
  color: var(--lime-deep);
}
.option-btn-icon {
  font-size: 1.4rem;
  display: block;
  margin-bottom: .3rem;
}
.option-grid-3 { grid-template-columns: repeat(3, 1fr); }
.option-grid-4 { grid-template-columns: repeat(4, 1fr); }

.bcs-scale {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 4px;
  margin-bottom: .5rem;
}
.bcs-btn {
  aspect-ratio: 1;
  background: var(--gray-50);
  border: 1.5px solid var(--gray-100);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 800;
  font-family: var(--font-display);
  color: var(--gray-500);
  transition: all var(--transition);
}
.bcs-btn:hover { transform: translateY(-2px); border-color: var(--mint); }
.bcs-btn.active {
  background: var(--lime);
  color: var(--charcoal);
  border-color: var(--lime-dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}
.bcs-labels {
  display: flex;
  justify-content: space-between;
  font-size: .72rem;
  color: var(--gray-500);
  margin-top: .25rem;
}

.calc-btn {
  width: 100%;
  padding: 1rem;
  background: linear-gradient(135deg, var(--lime), var(--lime-dark));
  color: var(--charcoal);
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  margin-top: 1rem;
  transition: all var(--transition);
  box-shadow: var(--shadow-lime);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
}
.calc-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(99,200,16,.45); }
.calc-btn:active { transform: translateY(0); }

/* RESULTS */
.results-card {
  background: linear-gradient(135deg, var(--charcoal) 0%, var(--charcoal-3) 100%);
  border-radius: var(--radius-xl);
  padding: 2rem;
  color: var(--white);
  position: sticky;
  top: 110px;
  overflow: hidden;
}
.results-card::before {
  content: '';
  position: absolute;
  top: -50px; right: -50px;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(99,200,16,.18), transparent 60%);
  border-radius: 50%;
}
.results-empty {
  text-align: center;
  padding: 2rem 1rem;
  color: rgba(255,255,255,.5);
  position: relative;
}
.results-empty-icon {
  width: 80px; height: 80px;
  margin: 0 auto 1rem;
  background: rgba(99,200,16,.15);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 2.4rem;
}
.results-empty h3 {
  color: var(--white);
  font-size: 1.1rem;
  margin-bottom: .55rem;
}
.results-show { display: none; position: relative; }
.results-show.visible { display: block; animation: fadeUp .5s ease both; }
.result-main {
  text-align: center;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(255,255,255,.08);
  margin-bottom: 1.5rem;
}
.result-big-num {
  font-family: var(--font-display);
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--lime);
  line-height: 1;
}
.result-big-lbl {
  color: rgba(255,255,255,.7);
  font-size: .92rem;
  margin-top: .35rem;
}
.result-rows { display: grid; gap: .85rem; }
.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .85rem 1rem;
  background: rgba(255,255,255,.05);
  border-radius: 12px;
}
.result-row-lbl {
  color: rgba(255,255,255,.7);
  font-size: .85rem;
}
.result-row-val {
  font-weight: 700;
  color: var(--white);
  font-size: .95rem;
}
.result-row-val.lime { color: var(--lime); }
.result-actions {
  display: flex;
  gap: .55rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}
.result-actions button {
  flex: 1;
  padding: .65rem 1rem;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-pill);
  color: var(--white);
  font-weight: 600;
  font-size: .82rem;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.result-actions button:hover {
  background: var(--lime);
  color: var(--charcoal);
  border-color: var(--lime);
}
.result-note {
  margin-top: 1.25rem;
  padding: .85rem;
  background: rgba(99,200,16,.1);
  border: 1px solid rgba(99,200,16,.2);
  border-radius: 10px;
  font-size: .82rem;
  color: rgba(255,255,255,.85);
  line-height: 1.55;
}

/* INFO BOXES */
.info-section {
  padding: 4rem 0;
  background: var(--cream);
}
.info-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.25rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.info-card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-100);
  transition: all var(--transition);
}
.info-card:hover {
  border-color: var(--mint);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.info-card-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: var(--mint-soft);
  display: grid;
  place-items: center;
  font-size: 1.6rem;
  margin-bottom: 1rem;
}
.info-card h3 {
  font-size: 1.1rem;
  margin-bottom: .5rem;
}
.info-card p {
  color: var(--gray-500);
  font-size: .9rem;
  line-height: 1.65;
}

/* FORMULA */
.formula-section {
  background: var(--white);
  padding: 4rem 0;
}
.formula-card {
  max-width: 800px;
  margin: 0 auto;
  padding: 2.5rem;
  background: linear-gradient(135deg, var(--mint-pale), var(--white));
  border: 1.5px solid var(--mint);
  border-radius: var(--radius-xl);
  text-align: center;
}
.formula-box {
  background: var(--charcoal);
  color: var(--lime);
  padding: 1.5rem 2rem;
  border-radius: var(--radius);
  margin: 1.5rem 0;
  font-family: 'Courier New', monospace;
  font-size: 1.3rem;
  font-weight: 700;
  display: inline-block;
}

/* FAQ */
.faq-section {
  padding: 4rem 0;
  background: var(--cream);
}
.faq-list {
  max-width: 880px;
  margin: 2.5rem auto 0;
  padding: 0 1.25rem;
}
.faq-item {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  margin-bottom: .85rem;
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item.open {
  border-color: var(--lime);
  box-shadow: var(--shadow-sm);
}
.faq-q {
  width: 100%;
  padding: 1.2rem 1.5rem;
  text-align: left;
  font-weight: 600;
  color: var(--charcoal);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  transition: all var(--transition);
}
.faq-q:hover { background: var(--mint-pale); }
.faq-icon {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--mint-soft);
  color: var(--lime-deep);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--lime);
  color: var(--white);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-item.open .faq-a { max-height: 500px; }
.faq-a-inner {
  padding: 0 1.5rem 1.25rem;
  color: var(--gray-700);
  line-height: 1.75;
  font-size: .95rem;
}

/* TOOLTIP */
.tooltip {
  position: fixed;
  background: var(--charcoal);
  color: var(--white);
  padding: .65rem .9rem;
  border-radius: 8px;
  font-size: .82rem;
  max-width: 240px;
  line-height: 1.5;
  z-index: 9999;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition);
  box-shadow: var(--shadow-md);
}
.tooltip.show { opacity: 1; }

@media (max-width: 900px) {
  .calc-grid { grid-template-columns: 1fr; }
  .results-card { position: static; }
  .info-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .calc-card { padding: 1.75rem; }
  .info-grid { grid-template-columns: 1fr; }
  .formula-card { padding: 1.75rem; }
  .formula-box { font-size: 1rem; padding: 1rem 1.25rem; }
  .option-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .bcs-scale { grid-template-columns: repeat(9, 1fr); gap: 2px; }
  .bcs-btn { font-size: .85rem; }
  .result-big-num { font-size: 2.6rem; }
  .tool-hero { padding: 2.5rem 0 1.5rem; }
}