/* =========================================================
   TaxNova — Calculator Page Stylesheet
   Section 1: Inputs | 2: Results | 3: Methodology | 4: Breakdown | 5: FAQ
   ========================================================= */

.calc-header {
  padding: var(--space-7) 0 var(--space-6);
  border-bottom: 1px solid var(--border-soft);
}
.calc-header h1 { font-size: clamp(1.7rem, 4vw, 2.3rem); font-weight: 800; margin-bottom: var(--space-3); }
.calc-header .calc-sub { color: var(--slate); font-size: 1.05rem; max-width: 680px; }
.calc-meta-row {
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
  margin-top: var(--space-5);
  font-size: 0.85rem;
  color: var(--slate);
}
.calc-meta-row span { display: flex; align-items: center; gap: 6px; }
.calc-meta-row svg { width: 15px; height: 15px; }

/* ---------- Layout: Inputs + Results side by side on desktop ---------- */
.calc-workspace { padding: var(--space-7) 0; }
.calc-workspace-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: start;
}
@media (max-width: 960px) {
  .calc-workspace-grid { grid-template-columns: 1fr; }
}

.calc-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: white;
  padding: var(--space-6);
}
.calc-panel-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: 8px;
}
.calc-panel-sub { color: var(--slate); font-size: 0.88rem; margin-bottom: var(--space-5); }

/* Sticky results on desktop */
.results-panel { position: sticky; top: 86px; }

/* ---------- Form ---------- */
.form-group { margin-bottom: var(--space-5); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
@media (max-width: 500px) { .form-row { grid-template-columns: 1fr; } }

.form-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 8px;
  color: var(--ink-soft);
}
.tooltip-trigger {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--border-soft);
  color: var(--slate);
  font-size: 0.68rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: help;
  position: relative;
  flex-shrink: 0;
}
.tooltip-trigger:hover, .tooltip-trigger:focus-visible { background: var(--blue); color: white; }
.tooltip-trigger .tooltip-bubble {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: white;
  font-size: 0.78rem;
  font-weight: 400;
  line-height: 1.4;
  padding: 10px 12px;
  border-radius: 8px;
  width: 230px;
  z-index: 20;
  text-align: left;
  box-shadow: var(--shadow-lg);
}
.tooltip-trigger .tooltip-bubble::after {
  content: "";
  position: absolute;
  top: 100%; left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--ink);
}
.tooltip-trigger:hover .tooltip-bubble,
.tooltip-trigger:focus-visible .tooltip-bubble { display: block; }

.input-wrap { position: relative; }
.input-wrap .prefix {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--slate); font-weight: 600; font-size: 0.95rem;
}
.input-wrap input {
  width: 100%;
  padding: 13px 14px 13px 32px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: var(--font-mono);
  background: white;
  transition: border-color 0.15s ease;
}
.input-wrap input:focus { border-color: var(--blue); outline: none; box-shadow: 0 0 0 3px var(--blue-tint-strong); }
.input-wrap input.error { border-color: var(--red); }
.field-hint { font-size: 0.78rem; color: var(--slate-light); margin-top: 6px; }
.field-error { font-size: 0.8rem; color: var(--red); margin-top: 6px; display: none; }
.field-error.show { display: block; }

.regime-toggle {
  display: flex;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-5);
}
.regime-toggle button {
  flex: 1;
  background: white;
  border: none;
  padding: 12px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--slate);
  border-right: 1px solid var(--border);
}
.regime-toggle button:last-child { border-right: none; }
.regime-toggle button.active { background: var(--blue); color: white; }

.fieldset-divider {
  border: none;
  border-top: 1px solid var(--border-soft);
  margin: var(--space-5) 0;
}
.section-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--slate-light);
  margin-bottom: var(--space-4);
}

/* ---------- Results panel ---------- */
.result-hero {
  background: linear-gradient(135deg, var(--blue-tint) 0%, var(--green-tint) 100%);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  text-align: center;
  margin-bottom: var(--space-5);
}
.result-hero .label { font-size: 0.85rem; color: var(--slate); font-weight: 600; margin-bottom: 6px; }
.result-hero .big-number {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 6vw, 2.6rem);
  font-weight: 800;
  color: var(--ink);
  line-height: 1;
}
.result-hero .big-number.green { color: var(--green-dark); }
.result-hero .sub-label { font-size: 0.85rem; color: var(--slate); margin-top: 8px; }

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}
.result-stat {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
}
.result-stat .stat-label { font-size: 0.78rem; color: var(--slate); margin-bottom: 4px; }
.result-stat .stat-value { font-family: var(--font-mono); font-size: 1.25rem; font-weight: 700; }

/* Regime comparison — signature element */
.regime-compare {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
}
.regime-compare-title { font-weight: 700; font-size: 0.95rem; margin-bottom: var(--space-4); }
.regime-bar-row { margin-bottom: var(--space-4); }
.regime-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  margin-bottom: 6px;
}
.regime-bar-label .name { font-weight: 600; }
.regime-bar-label .amount { font-family: var(--font-mono); font-weight: 700; }
.regime-bar-track {
  height: 14px;
  background: var(--border-soft);
  border-radius: 999px;
  overflow: hidden;
}
.regime-bar-fill { height: 100%; border-radius: 999px; }
.regime-bar-fill.old { background: var(--slate-light); }
.regime-bar-fill.new { background: var(--green); }
.regime-bar-fill.winner { background: var(--blue); }
.regime-winner-tag {
  margin-top: var(--space-4);
  background: var(--green-tint);
  color: var(--green-dark);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 0.88rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}
.regime-winner-tag svg { width: 18px; height: 18px; flex-shrink: 0; }

.result-actions { display: flex; gap: var(--space-3); }
.result-actions .btn { flex: 1; }

/* ---------- Methodology accordion (Section 3) ---------- */
.methodology-section { padding: var(--space-7) 0; }
.method-steps {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-5);
}
.method-step {
  display: flex;
  gap: var(--space-4);
  padding-bottom: var(--space-5);
  margin-bottom: var(--space-5);
  border-bottom: 1px solid var(--border-soft);
}
.method-step:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.method-step .step-num {
  flex-shrink: 0;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--blue-tint);
  color: var(--blue);
  font-weight: 700;
  font-size: 0.9rem;
  display: flex; align-items: center; justify-content: center;
}
.method-step .step-body h4 { font-size: 1rem; margin-bottom: 6px; }
.method-step .step-body p { color: var(--slate); font-size: 0.93rem; }
.method-step .formula-box {
  background: #FAFBFD;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  margin-top: 10px;
  overflow-x: auto;
  white-space: nowrap;
}

.method-accordion .faq-item summary { font-size: 0.98rem; }

/* ---------- Breakdown tables (Section 4) ---------- */
.breakdown-table-wrap { overflow-x: auto; margin-bottom: var(--space-6); }
.breakdown-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; min-width: 480px; }
.breakdown-table caption { text-align: left; font-weight: 700; margin-bottom: var(--space-3); font-size: 0.98rem; }
.breakdown-table th, .breakdown-table td { padding: 12px 14px; border-bottom: 1px solid var(--border-soft); text-align: left; }
.breakdown-table thead th { background: #FAFBFD; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--slate); font-weight: 700; }
.breakdown-table td.num, .breakdown-table th.num { text-align: right; font-family: var(--font-mono); }
.breakdown-table tr.total-row td { font-weight: 700; border-top: 2px solid var(--ink); border-bottom: none; }
.breakdown-table tr.deduction td:first-child { color: var(--green-dark); }
.breakdown-table tr.deduction td.num { color: var(--green-dark); }

.tab-group { display: flex; gap: var(--space-2); margin-bottom: var(--space-5); border-bottom: 1px solid var(--border); }
.tab-group button {
  background: none; border: none; padding: 12px 18px;
  font-weight: 600; font-size: 0.92rem; color: var(--slate);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.tab-group button.active { color: var(--blue); border-bottom-color: var(--blue); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- Disclaimer / trust callouts ---------- */
.disclaimer-box {
  background: var(--amber-tint);
  border: 1px solid #FDE9C8;
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  display: flex;
  gap: var(--space-3);
  font-size: 0.9rem;
  color: #92400E;
  margin: var(--space-5) 0;
}
.disclaimer-box svg { width: 20px; height: 20px; flex-shrink: 0; margin-top: 2px; }
.disclaimer-box strong { display: block; margin-bottom: 4px; color: #78350F; }

.reference-box {
  background: var(--blue-tint);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  margin-top: var(--space-6);
}
.reference-box h4 { font-size: 0.95rem; margin-bottom: var(--space-3); }
.reference-box ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.reference-box a { font-size: 0.9rem; }

/* ---------- Slab table ---------- */
.slab-table-wrap { margin-top: var(--space-3); }

/* ---------- Internal linking / related calcs ---------- */
.related-calcs { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
@media (max-width: 760px) { .related-calcs { grid-template-columns: 1fr; } }

/* error summary */
.error-summary {
  display: none;
  background: var(--red-tint);
  border: 1px solid #FCA5A5;
  color: var(--red);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  font-size: 0.88rem;
  margin-bottom: var(--space-5);
}
.error-summary.show { display: block; }