/* ============================================================
   CandleLab — Styled to match Corporate Punk Industries
   Palette: magenta #F72EED | black #141413 | off-white #F9FAFB
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --pink:        #F72EED;
  --pink-dark:   #C520BA;
  --pink-light:  #FEE9FD;
  --pink-mid:    #F9AAED;
  --black:       #141413;
  --dark:        #262626;
  --mid:         #666666;
  --border:      #E5E5E5;
  --white:       #FFFFFF;
  --bg:          #F9FAFB;
  --card-bg:     #FFFFFF;
  --radius:      4px;
  --radius-sm:   2px;
  --font:        'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --shadow:      0 1px 4px rgba(0,0,0,0.08);
  --shadow-lg:   0 4px 20px rgba(0,0,0,0.12);
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--dark);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---- Cookie banner ---- */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--black);
  color: var(--white);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  z-index: 100;
  font-size: 0.85rem;
}

.cookie-banner p {
  flex: 1;
  min-width: 200px;
}

.cookie-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.btn-cookie-accept,
.btn-cookie-decline {
  padding: 8px 16px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.btn-cookie-accept {
  background: var(--pink);
  color: var(--white);
}

.btn-cookie-decline {
  background: transparent;
  color: var(--pink-mid);
  border: 1px solid var(--pink-mid);
}

.cookie-banner.hidden {
  display: none;
}

/* ---- Header ---- */
.site-header {
  background: var(--white);
  border-bottom: 2px solid var(--black);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  max-width: 640px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-icon {
  font-size: 1.3rem;
  line-height: 1;
}

.logo-text {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--black);
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

/* Pink highlight block on "Lab" — mimics CPI logo style */
.logo-text em {
  font-style: normal;
  background: var(--pink);
  color: var(--white);
  padding: 0 4px;
  margin-left: 1px;
}

.units-toggle {
  display: flex;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 2px;
  padding: 2px;
  gap: 2px;
}

.unit-btn {
  padding: 5px 12px;
  border: none;
  border-radius: 1px;
  background: transparent;
  color: var(--dark);
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--font);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: all 0.15s ease;
}

.unit-btn.active {
  background: var(--black);
  color: var(--white);
}

/* ---- Main layout ---- */
.main {
  flex: 1;
  padding: 28px 0 48px;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---- Intro ---- */
.intro {
  margin-bottom: 28px;
}

.intro-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--black);
  letter-spacing: -0.04em;
  text-transform: uppercase;
  line-height: 1.05;
  margin-bottom: 10px;
}

.intro-title span {
  color: var(--pink);
}

.intro-body {
  color: var(--mid);
  font-size: 0.95rem;
  max-width: 480px;
}

/* ---- Calculator form ---- */
.calculator {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field-group {
  border: none;
  padding: 0;
  background: var(--card-bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.field-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.field-hint {
  font-size: 0.78rem;
  color: var(--mid);
  margin-top: 8px;
}

/* Button grids */
.button-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.button-row {
  display: flex;
  gap: 6px;
}

.button-row .option-btn {
  flex: 1;
}

/* Option buttons */
.option-btn {
  padding: 10px 8px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--white);
  color: var(--dark);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.12s ease;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  text-align: center;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.78rem;
}

.option-btn:hover {
  border-color: var(--pink);
  color: var(--pink);
}

.option-btn.active {
  border-color: var(--pink);
  background: var(--pink);
  color: var(--white);
}

.badge {
  display: inline-block;
  font-size: 0.58rem;
  font-weight: 700;
  background: var(--black);
  color: var(--white);
  padding: 1px 5px;
  border-radius: 2px;
  margin-left: 4px;
  vertical-align: middle;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Strength buttons */
.strength-row {
  gap: 8px;
}

.strength-btn {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  font-size: 0.82rem;
}

/* Container size input */
.input-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.number-input {
  flex: 1;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1.3rem;
  font-weight: 700;
  font-family: var(--font);
  color: var(--black);
  background: var(--white);
  transition: border-color 0.12s ease;
  -moz-appearance: textfield;
}

.number-input::-webkit-outer-spin-button,
.number-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
}

.number-input:focus {
  outline: none;
  border-color: var(--pink);
}

.number-input::placeholder {
  color: #CCC;
  font-weight: 400;
}

.input-unit {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--mid);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  min-width: 30px;
}

/* Stepper */
.stepper {
  display: flex;
  align-items: center;
  width: fit-content;
}

.stepper-btn {
  width: 44px;
  height: 44px;
  border: 1.5px solid var(--border);
  background: var(--white);
  color: var(--black);
  font-size: 1.3rem;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.12s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.stepper-btn:first-child {
  border-right: none;
}

.stepper-btn:last-child {
  border-left: none;
}

.stepper-btn:hover {
  background: var(--pink);
  border-color: var(--pink);
  color: var(--white);
}

.stepper-value {
  width: 56px;
  height: 44px;
  border: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--black);
}

/* Calculate button */
.calculate-btn {
  padding: 16px;
  background: var(--black);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 800;
  font-family: var(--font);
  cursor: pointer;
  transition: background 0.15s ease;
  min-height: 52px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.calculate-btn:hover {
  background: var(--pink);
}

.calculate-btn:active {
  opacity: 0.9;
}

/* ---- Result / Recipe card ---- */
.result {
  margin-top: 8px;
}

.result[hidden] {
  display: none;
}

.recipe-card {
  background: var(--card-bg);
  border: 2px solid var(--black);
  border-radius: var(--radius);
  overflow: hidden;
}

.recipe-header {
  background: var(--black);
  color: var(--white);
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.recipe-logo {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.7;
}

.recipe-title {
  font-size: 1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.recipe-body {
  padding: 20px 24px;
}

.recipe-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 16px;
  margin-bottom: 4px;
}

.recipe-detail {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.detail-label {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--mid);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.detail-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--black);
}

.recipe-divider {
  height: 1px;
  background: var(--border);
  margin: 16px 0;
}

.recipe-results {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}

.result-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--mid);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.75rem;
}

.result-value {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--black);
}

.result-value.highlight {
  color: var(--pink);
  font-size: 1.4rem;
}

.total-row {
  padding-top: 8px;
  border-top: 1px dashed var(--border);
}

.recipe-tip {
  font-size: 0.82rem;
  color: var(--mid);
  background: var(--bg);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--pink);
}

.recipe-actions {
  display: flex;
  gap: 0;
  border-top: 2px solid var(--black);
}

.action-btn {
  flex: 1;
  padding: 12px;
  border: none;
  border-right: 1px solid var(--border);
  background: var(--black);
  color: var(--white);
  font-size: 0.78rem;
  font-weight: 700;
  font-family: var(--font);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background 0.12s ease;
  min-height: 48px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.action-btn:last-child {
  border-right: none;
}

.action-btn:hover {
  background: var(--pink);
}

.action-btn.copied {
  background: var(--pink);
}

.recalculate-btn {
  display: block;
  margin-top: 14px;
  padding: 8px 0;
  border: none;
  background: transparent;
  color: var(--mid);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.75rem;
}

.recalculate-btn:hover {
  color: var(--pink);
}

/* ---- FAQ section ---- */
.faq {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 2px solid var(--black);
}

.faq-title {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--black);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  padding: 14px 0;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--black);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: '+';
  font-size: 1.2rem;
  color: var(--pink);
  font-weight: 400;
  flex-shrink: 0;
  margin-left: 8px;
}

details[open] .faq-question::after {
  content: '−';
}

.faq-answer {
  padding: 0 0 14px;
  font-size: 0.875rem;
  color: var(--mid);
  line-height: 1.65;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--black);
  padding: 20px 0;
  margin-top: auto;
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.site-footer p {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.site-footer a {
  color: var(--pink);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

.reset-prefs {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.35);
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0;
}

.reset-prefs:hover {
  color: var(--pink);
}

/* ---- Print styles ---- */
@media print {
  .site-header,
  .calculator,
  .intro,
  .recalculate-btn,
  .recipe-actions,
  .faq,
  .site-footer,
  .cookie-banner {
    display: none !important;
  }

  body {
    background: white;
  }

  .result {
    display: block !important;
  }

  .recipe-card {
    border: 2px solid #141413;
    break-inside: avoid;
  }

  .recipe-header {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}

/* ---- Responsive ---- */
@media (min-width: 520px) {
  .intro-title {
    font-size: 2.8rem;
  }

  .button-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .recipe-detail-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 640px) {
  .main {
    padding: 36px 0 60px;
  }

  .field-group {
    padding: 22px 24px;
  }
}