/* css/styles.css
   Apical Arbor Solutions brand-matched stylesheet.
   Palette, fonts, and rhythm mirror apicalarbor.solutions. */

:root {
  /* Forest greens (primary brand) */
  --green-950: #0f2410;
  --green-900: #1a3a1a;
  --green-800: #234a23;
  --green-700: #2d5a2d;
  --green-600: #3a7038;
  --green-500: #4a8a3f;
  --green-200: #c8dac8;
  --green-100: #e6efe6;
  --green-50:  #f0f5f0;

  /* Cream / paper neutrals */
  --cream:     #f8f5ee;
  --cream-2:   #f0ece2;
  --paper:     #fdfcf8;

  /* Text */
  --ink:       #1a1f1a;
  --ink-2:     #4a504a;
  --muted:     #6a706a;

  /* Lines */
  --line:      #e0dccc;
  --line-2:    #d4d0c1;

  /* Accent */
  --gold:      #d4a849;
  --gold-2:    #b8902f;

  /* Typography (matches apicalarbor.solutions) */
  --font-ui:   'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-disp: 'Fraunces', 'Inter', Georgia, serif;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(15, 36, 16, 0.04), 0 1px 3px rgba(15, 36, 16, 0.06);
  --shadow:    0 2px 4px rgba(15, 36, 16, 0.06), 0 4px 12px rgba(15, 36, 16, 0.08);
  --shadow-lg: 0 8px 24px rgba(15, 36, 16, 0.10), 0 16px 48px rgba(15, 36, 16, 0.12);

  /* Radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
}

/* Reset / base */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-disp);
  color: var(--green-950);
  margin: 0 0 0.5em;
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.01em;
}

p { margin: 0 0 1em; }

a { color: var(--green-700); text-decoration: none; }
a:hover { color: var(--green-900); text-decoration: underline; }

button { font-family: inherit; cursor: pointer; }

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 8px;
  background: var(--green-900);
  color: #fff;
  padding: 8px 14px;
  border-radius: var(--r-sm);
  z-index: 100;
  transition: top 0.2s;
}
.skip-link:focus { top: 8px; }

/* Header */
.site-header {
  text-align: center;
  padding: 48px 24px 32px;
  background: linear-gradient(180deg, var(--green-50) 0%, var(--cream) 100%);
  border-bottom: 1px solid var(--line);
}

.present-badge {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--green-700);
  background: var(--green-100);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
  font-weight: 600;
}

.site-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--green-950);
  font-feature-settings: "ss01", "ss02";
}

.site-subtitle {
  max-width: 640px;
  margin: 0 auto;
  font-size: 17px;
  color: var(--ink-2);
  line-height: 1.5;
}

/* Main */
main {
  max-width: 880px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

section + section { margin-top: 24px; }

/* Card base */
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px 28px 32px;
  box-shadow: var(--shadow-sm);
}

.section-title {
  font-size: 26px;
  margin-bottom: 8px;
}

.section-help {
  color: var(--muted);
  font-size: 15px;
  margin-bottom: 24px;
}

/* Form */
.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

@media (max-width: 720px) {
  .field-grid { grid-template-columns: 1fr; }
}

.field {
  display: flex;
  flex-direction: column;
}

.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.field-unit {
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.field select,
.field input[type="number"],
.field input[type="text"] {
  appearance: none;
  -webkit-appearance: none;
  background: var(--paper);
  border: 1px solid var(--line-2);
  border-radius: var(--r-md);
  padding: 12px 14px;
  font-size: 16px;
  color: var(--ink);
  transition: border-color 0.15s, box-shadow 0.15s;
  width: 100%;
}

.field select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'><path d='M3 4.5l3 3 3-3' stroke='%231a3a1a' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 14px;
  padding-right: 36px;
}

.field select:focus,
.field input:focus {
  outline: none;
  border-color: var(--green-600);
  box-shadow: 0 0 0 3px rgba(58, 112, 56, 0.15);
}

.field-help {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.45;
}

/* Fuel selector */
.fuel-selector {
  border: none;
  padding: 0;
  margin: 0 0 20px;
}

.fuel-selector legend {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
  padding: 0;
}

.fuel-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 12px;
}

@media (max-width: 600px) {
  .fuel-buttons { grid-template-columns: 1fr 1fr; }
}

.fuel-option {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 8px;
  border: 1.5px solid var(--line-2);
  border-radius: var(--r-md);
  background: var(--paper);
  cursor: pointer;
  transition: all 0.15s;
  text-align: center;
}

.fuel-option input { position: absolute; opacity: 0; pointer-events: none; }

.fuel-option .fuel-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-2);
}

.fuel-option:hover {
  border-color: var(--green-500);
  background: var(--green-50);
}

.fuel-option:has(input:checked) {
  border-color: var(--green-700);
  background: var(--green-100);
  box-shadow: inset 0 0 0 1px var(--green-700);
}

.fuel-option:has(input:checked) .fuel-label {
  color: var(--green-900);
  font-weight: 600;
}

/* Advanced (collapsible) */
.advanced {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 0;
  margin-bottom: 24px;
  background: var(--green-50);
}

.advanced summary {
  padding: 12px 16px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--green-800);
  user-select: none;
  list-style: none;
}

.advanced summary::-webkit-details-marker { display: none; }
.advanced summary::before {
  content: "▸ ";
  display: inline-block;
  transition: transform 0.2s;
}
.advanced[open] summary::before { transform: rotate(90deg); }

.advanced-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  padding: 0 16px 16px;
}

@media (max-width: 600px) {
  .advanced-grid { grid-template-columns: 1fr 1fr; }
}

.field-price input {
  padding: 8px 10px !important;
  font-size: 14px !important;
}

.advanced-note {
  margin: 0 16px 16px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}

/* Submit button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--green-700);
  color: #fff;
  border: 1.5px solid var(--green-700);
  border-radius: var(--r-md);
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  font-family: var(--font-ui);
}

.btn-primary:hover {
  background: var(--green-900);
  border-color: var(--green-900);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: #fff;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--green-700);
  border: 1.5px solid var(--green-700);
  border-radius: var(--r-md);
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font-ui);
}

.btn-secondary:hover {
  background: var(--green-700);
  color: #fff;
}

.calc-btn {
  width: 100%;
  font-size: 18px;
  padding: 16px 32px;
}

/* Results */
.results {
  margin-top: 32px;
  animation: fadeUp 0.4s ease-out;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result-card {
  margin-bottom: 16px;
}

.result-card.highlight {
  background: linear-gradient(180deg, var(--green-50) 0%, var(--paper) 30%);
  border-color: var(--green-300, #94c094);
  box-shadow: 0 0 0 1px var(--green-200), var(--shadow);
}

.result-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--green-700);
  font-weight: 600;
  margin-bottom: 10px;
}

.result-value {
  font-family: var(--font-disp);
  font-size: 42px;
  font-weight: 600;
  color: var(--green-950);
  line-height: 1;
  margin-bottom: 8px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
}

.result-value.big {
  font-size: 56px;
  color: var(--green-800);
}

.result-unit {
  font-family: var(--font-ui);
  font-size: 16px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.result-sub {
  font-size: 15px;
  color: var(--ink-2);
  margin-bottom: 12px;
}

.result-meta {
  font-size: 13px;
  color: var(--muted);
  margin-top: 4px;
}

.result-note {
  font-size: 14px;
  color: var(--ink-2);
  margin-bottom: 12px;
}

.result-disclaimer {
  font-size: 12px;
  color: var(--muted);
  font-style: italic;
  margin: 12px 0 0;
  line-height: 1.5;
}

/* Equivalent list */
.equiv-list {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 20px;
}

@media (max-width: 600px) {
  .equiv-list { grid-template-columns: 1fr; }
}

.equiv-list li {
  font-size: 14px;
  color: var(--ink-2);
  padding: 6px 0;
  border-bottom: 1px dashed var(--line);
}

.equiv-list li::before {
  content: "≈";
  margin-right: 8px;
  color: var(--green-600);
  font-weight: 600;
}

/* Fuel savings table inside money card */
.fuel-savings-table {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.fuel-savings-header {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.fuel-savings-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

@media (max-width: 600px) {
  .fuel-savings-list { grid-template-columns: 1fr; }
}

.fuel-savings-list li {
  display: flex;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  font-size: 13px;
}

.fuel-savings-list .fs-fuel { color: var(--muted); }
.fuel-savings-list .fs-value { color: var(--green-800); font-weight: 600; }

/* Carbon equivalency */
.carbon-equiv {
  font-size: 16px;
  color: var(--green-800);
  background: var(--green-100);
  padding: 12px 16px;
  border-radius: var(--r-md);
  margin: 12px 0;
  font-weight: 500;
}

/* CTA soft */
.cta-soft {
  text-align: center;
  padding: 32px 24px;
  background: var(--green-900);
  color: #fff;
  border-radius: var(--r-lg);
  margin-top: 24px;
  font-size: 16px;
  line-height: 1.6;
}

.cta-soft strong { color: var(--gold); }

.cta-phone {
  color: var(--gold) !important;
  font-weight: 700;
  font-size: 22px;
  font-family: var(--font-disp);
  text-decoration: none !important;
}

.cta-phone:hover { color: #f0d790 !important; }

/* Result actions */
.result-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 20px;
  flex-wrap: wrap;
}

/* Upgrade promo (paid tier) */
.upgrade-promo {
  display: flex;
  align-items: center;
  gap: 24px;
  background: linear-gradient(135deg, var(--cream-2) 0%, var(--paper) 100%);
  border: 2px solid var(--gold);
  border-radius: var(--r-lg);
  padding: 24px 28px;
  margin-top: 24px;
}

@media (max-width: 600px) {
  .upgrade-promo { flex-direction: column; align-items: stretch; text-align: center; }
}

.upgrade-badge {
  flex-shrink: 0;
  background: var(--gold);
  color: var(--green-950);
  font-family: var(--font-disp);
  font-weight: 700;
  font-size: 18px;
  padding: 12px 20px;
  border-radius: var(--r-md);
  letter-spacing: 0.04em;
}

.upgrade-content { flex: 1; }
.upgrade-content h4 { font-size: 17px; margin-bottom: 4px; color: var(--green-900); }
.upgrade-content p { font-size: 14px; color: var(--ink-2); margin: 0 0 12px; }

.upgrade-btn { font-size: 14px !important; padding: 10px 18px !important; }

/* Disclaimers */
.disclaimers {
  background: var(--cream-2);
  border-color: var(--line-2);
  margin-top: 32px;
}

.disclaimers h3 {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--green-900);
}

.disclaimers p {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.55;
  margin-bottom: 10px;
}

.disclaimers p:last-child { margin-bottom: 0; }

/* Footer */
.site-footer {
  background: var(--green-950);
  color: var(--green-200);
  padding: 32px 24px;
  text-align: center;
  margin-top: 48px;
  font-size: 13px;
  line-height: 1.6;
}

.footer-brand strong { color: #fff; }
.footer-brand a { color: var(--gold) !important; }

.footer-meta {
  margin-top: 12px;
  font-size: 12px;
  color: var(--green-200);
}

.footer-meta a { color: var(--green-200) !important; text-decoration: underline; }
.footer-meta a:hover { color: #fff !important; }

.footer-promo {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--green-200);
  opacity: 0.7;
}

/* Print */
@media print {
  .site-header, .site-footer, .cta-soft, .upgrade-promo,
  .result-actions, .disclaimers, .calculator, .fuel-selector {
    display: none !important;
  }
  body { background: #fff; }
  .results { margin-top: 0; }
  .card { box-shadow: none; border: 1px solid #ccc; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}