#peptide-calculator-page {
  --brand:        #1A2036;
  --brand-mid:    #232d4a;
  --brand-hover:  #111827;
  --gold:         #A68A40;
  --gold-light:   #c4a455;
  --gold-subtle:  rgba(166,138,64,.10);
  --gold-border:  rgba(166,138,64,.28);
  --neutral-600:  #5b5b73;
  --text:         #0F172A;
  --text-subtle:  #475569;
  --bg:           #F7F8FB;
  --card:         #FFFFFF;
  --success:      #1F9D55;
  --error:        #E23D3D;
  --radius:       10px;
  --radius-sm:    8px;
  --shadow:       0 4px 14px rgba(26,32,54,.10);
  --shadow-soft:  0 2px 6px rgba(26,32,54,.07);
  --focus:        0 0 0 3px rgba(166,138,64,.25);
  color: #a68a40;
}

#peptide-calculator-page .calculator-container {
  max-width: 980px;
  margin: 0 auto;
  padding: 20px 18px;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid #DDE2EF;
}

/* ── Hero ── */
#peptide-calculator-page .ukp-hero {
  background: var(--brand);
  color: #fff;
  padding: 24px 22px;
  border-radius: var(--radius);
  margin-bottom: 18px;
  border-bottom: 3px solid var(--gold);
  position: relative;
  overflow: hidden;
}
#peptide-calculator-page .ukp-hero::after {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 160px; height: 160px;
  border-radius: 50%;
  background: rgba(166,138,64,.10);
  pointer-events: none;
}
#peptide-calculator-page .ukp-hero h1 {
  margin: 0 0 6px 0;
  font-size: 26px;
  line-height: 1.2;
  color: #fff;
}
#peptide-calculator-page .ukp-hero p {
  margin: 0;
  opacity: .85;
  font-size: 14px;
}
#peptide-calculator-page .ukp-hero .hero-label {
  display: inline-block;
  background: var(--gold);
  color: var(--brand);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 10px;
}

/* ── Step sections ── */
#peptide-calculator-page .step-section {
  margin-bottom: 22px;
  padding: 18px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  border: 1px solid #DDE2EF;
}

#peptide-calculator-page .step-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 15px;
}

#peptide-calculator-page .step-number {
  background: var(--brand);
  color: var(--gold);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
  flex-shrink: 0;
  border: 2px solid var(--gold-border);
}

#peptide-calculator-page .step-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--brand);
  margin: 0;
}

/* ── Peptide buttons ── */
#peptide-calculator-page .peptide-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 10px;
}

#peptide-calculator-page .peptide-btn {
  background: white;
  border: 2px solid #DDE2EF;
  padding: 12px 6px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  font-weight: 600;
  color: var(--text);
  transition: all 0.2s;
  font-size: 13px;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}
#peptide-calculator-page .peptide-btn:hover {
  border-color: var(--gold);
  background: var(--gold-subtle);
  color: var(--brand);
}
#peptide-calculator-page .peptide-btn.selected {
  background: var(--brand);
  color: var(--gold);
  border-color: var(--gold);
}

/* ── Inputs ── */
#peptide-calculator-page .target-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
  margin-top: 10px;
}

#peptide-calculator-page .input-group {
  position: relative;
  margin-bottom: 14px;
}
#peptide-calculator-page .input-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 14px;
  color: var(--brand);
}
#peptide-calculator-page .input-group input,
#peptide-calculator-page .input-group select {
  width: 100%;
  padding: 12px;
  border: 1px solid #CBD5E1;
  border-radius: var(--radius-sm);
  font-size: 16px;
  background: #fff;
  transition: border-color .2s, box-shadow .2s;
  box-sizing: border-box;
  color: var(--text);
  height:49px;
}
#peptide-calculator-page .input-group input:focus,
#peptide-calculator-page .input-group select:focus {
  outline: none;
  box-shadow: var(--focus);
  border-color: var(--gold);
}
#peptide-calculator-page .input-group input.invalid {
  border-color: var(--error);
}
#peptide-calculator-page .small-input { width: 50%; }

/* ── Smart recommendations ── */
#peptide-calculator-page .smart-recommendations {
  background: var(--bg);
  border: 1px solid var(--gold-border);
  padding: 16px;
  border-radius: var(--radius-sm);
  margin-top: 15px;
  animation: slideIn 0.3s ease;
  border-left: 4px solid var(--gold);
}
@keyframes slideIn {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}
#peptide-calculator-page .smart-recommendations h4 {
  color: var(--brand);
  margin: 0 0 12px 0;
  font-size: 15px;
  font-weight: 700;
}

#peptide-calculator-page .recommendation-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
}

#peptide-calculator-page .rec-card {
  background: white;
  border: 1px solid #DDE2EF;
  padding: 14px;
  border-radius: var(--radius-sm);
  position: relative;
  transition: all .2s;
  cursor: pointer;
}
#peptide-calculator-page .rec-card.recommended {
  border: 2px solid var(--gold);
  background: linear-gradient(135deg, var(--gold-subtle) 0%, rgba(166,138,64,.03) 100%);
}
#peptide-calculator-page .rec-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--gold);
}
#peptide-calculator-page .badge {
  position: absolute;
  top: -8px; right: 8px;
  background: var(--gold);
  color: var(--brand);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
}
#peptide-calculator-page .rec-card h5 {
  margin: 0 0 8px 0;
  color: var(--brand);
  font-size: 14px;
  font-weight: 600;
}
#peptide-calculator-page .rec-details {
  font-size: 12px;
  color: var(--text-subtle);
  line-height: 1.4;
}
#peptide-calculator-page .rec-item {
  display: flex;
  justify-content: space-between;
  margin: 4px 0;
}
#peptide-calculator-page .rec-item .value {
  font-weight: 600;
  color: var(--brand);
}

/* ── Calculate button ── */
#peptide-calculator-page .calculate-btn {
  background: var(--brand);
  color: var(--gold);
  border: 2px solid var(--gold-border);
  padding: 15px 30px;
  font-size: 15px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  width: 100%;
  margin-top: 20px;
  transition: all .2s;
  font-weight: 700;
  letter-spacing: .03em;
}
#peptide-calculator-page .calculate-btn:hover {
  background: var(--brand-hover);
  border-color: var(--gold);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(26,32,54,.18);
}
#peptide-calculator-page .calculate-btn:disabled {
  background: var(--neutral-600);
  border-color: transparent;
  color: #ccc;
  cursor: not-allowed;
  transform: none;
}
@media (max-width: 480px) {
  #peptide-calculator-page .calculate-btn {
    position: sticky; bottom: 8px; z-index: 5;
  }
}

/* ── Result card ── */
#peptide-calculator-page .result-card {
  background: linear-gradient(135deg, rgba(26,32,54,.04) 0%, rgba(166,138,64,.05) 100%);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-sm);
  padding: 18px;
  margin-top: 18px;
  border-top: 3px solid var(--gold);
}
#peptide-calculator-page .result-card h3 {
  margin-top: 0;
  color: var(--brand);
  font-size: 18px;
  font-weight: 700;
}

#peptide-calculator-page .result-details {
  background: white;
  padding: 18px;
  border: 1px solid #DDE2EF;
  border-radius: var(--radius-sm);
  margin: 15px 0;
}

#peptide-calculator-page .result-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-bottom: 14px;
}
#peptide-calculator-page .result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 0;
  border-bottom: 1px solid #F3F4F6;
}
#peptide-calculator-page .result-item:last-child { border-bottom: none; }
#peptide-calculator-page .result-label {
  font-size: 14px;
  color: var(--text-subtle);
  font-weight: 500;
}
#peptide-calculator-page .result-value {
  font-size: 15px;
  font-weight: 700;
  color: var(--brand);
}

/* ── Syringe visual ── */
#peptide-calculator-page .syringe-container {
  position: relative;
  max-width: 500px;
  margin: 18px auto 8px;
  text-align: center;
}
#peptide-calculator-page .syringe-container img { width: 100%; height: auto; display: block; }
#peptide-calculator-page .syringe-overlay { display: none; }
#peptide-calculator-page .progress-bar {
  position: absolute; bottom: 0; left: 0; width: 100%; height: 20px; background: transparent;
}
#peptide-calculator-page .progress {
  height: 100%; background: var(--gold); transition: width .3s; opacity: .65;
}
#peptide-calculator-page .progress-text {
  position: absolute; top: -45px; left: 50%; transform: translateX(-50%);
  font-size: 16px; font-weight: 700; color: var(--brand);
  background: white; padding: 6px 12px;
  border: 2px solid var(--gold);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-soft);
  white-space: nowrap;
}

/* ── Errors ── */
#peptide-calculator-page .error-message {
  color: var(--error);
  background: #FEF2F2;
  border: 1px solid #FECACA;
  padding: 10px;
  border-radius: var(--radius-sm);
  margin: 10px 0;
  font-size: 14px;
}

/* ── Reset button ── */
#peptide-calculator-page .reset-btn {
  background: transparent;
  color: var(--brand);
  border: 1px solid var(--brand);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  margin-top: 10px;
  transition: all .2s;
  font-weight: 600;
}
#peptide-calculator-page .reset-btn:hover {
  background: var(--brand);
  color: var(--gold);
  border-color: var(--gold);
}

/* ── Collapsible sections ── */
#peptide-calculator-page .collapsible {
  background: var(--card);
  border: 1px solid #DDE2EF;
  border-radius: var(--radius-sm);
  margin: 15px auto;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}
#peptide-calculator-page .collapsible-header {
  background: var(--bg);
  padding: 15px 18px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s;
  user-select: none;
  border-left: 4px solid var(--brand);
}
#peptide-calculator-page .collapsible-header:hover {
  background: rgba(26,32,54,.06);
}
#peptide-calculator-page .collapsible-header h3 {
  margin: 0;
  color: var(--brand);
  font-size: 17px;
  font-weight: 600;
}
#peptide-calculator-page .toggle-btn {
  background: var(--brand);
  color: var(--gold);
  width: 24px; height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  transition: transform 0.3s;
  flex-shrink: 0;
}
#peptide-calculator-page .collapsible-content {
  padding: 0 18px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}
#peptide-calculator-page .collapsible.active .collapsible-content { padding: 18px; }
#peptide-calculator-page .collapsible.active .toggle-btn { transform: rotate(45deg); }

/* ── Example cards ── */
#peptide-calculator-page .example-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 15px;
  margin-top: 15px;
}
#peptide-calculator-page .example-card {
  background: white;
  border: 1px solid #DDE2EF;
  border-radius: var(--radius-sm);
  padding: 15px;
  border-left: 4px solid var(--gold);
}
#peptide-calculator-page .example-card h4 {
  color: var(--brand);
  margin: 0 0 10px 0;
  font-size: 15px;
  font-weight: 600;
}
#peptide-calculator-page .example-card p {
  margin: 5px 0;
  font-size: 14px;
  line-height: 1.5;
}

/* ── FAQ ── */
#peptide-calculator-page .faq-container { margin-top: 15px; }
#peptide-calculator-page .faq-item {
  background: white;
  border: 1px solid #DDE2EF;
  border-radius: var(--radius-sm);
  padding: 15px;
  margin-bottom: 10px;
  border-left: 4px solid var(--gold);
}
#peptide-calculator-page .faq-item h4 {
  color: var(--brand);
  margin: 0 0 8px 0;
  font-size: 15px;
  font-weight: 600;
}
#peptide-calculator-page .faq-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
}

/* ── Conversion grid ── */
#peptide-calculator-page .conversion-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}
#peptide-calculator-page .conversion-item {
  background: var(--brand);
  color: var(--gold);
  padding: 14px 12px;
  border-radius: var(--radius-sm);
  text-align: center;
  font-weight: 700;
  font-size: 14px;
  border: 1px solid var(--gold-border);
  letter-spacing: .02em;
}

/* ── Guide steps ── */
#peptide-calculator-page .guide-steps { margin-top: 15px; }
#peptide-calculator-page .guide-step {
  display: flex;
  gap: 15px;
  margin-bottom: 20px;
  align-items: flex-start;
}
#peptide-calculator-page .step-content h4 {
  color: var(--brand);
  margin: 0 0 5px 0;
  font-size: 15px;
  font-weight: 600;
}
#peptide-calculator-page .step-content p {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
}

/* ── Mobile ── */
@media (max-width: 768px) {
  #peptide-calculator-page .calculator-container { padding: 10px 8px; margin: 0 5px; box-shadow: none; border: 1px solid #DDE2EF; }
  #peptide-calculator-page .step-section { margin-bottom: 18px; padding: 12px; }
  #peptide-calculator-page .recommendation-cards { grid-template-columns: 1fr; }
  #peptide-calculator-page .peptide-buttons { grid-template-columns: repeat(4, 1fr); gap: 8px; }
  #peptide-calculator-page .peptide-btn { padding: 10px 4px; font-size: 12px; }
  #peptide-calculator-page .target-inputs { grid-template-columns: 1fr; gap: 10px; }
  #peptide-calculator-page .small-input { width: 100%; }
  #peptide-calculator-page .step-title { font-size: 15px; }
  #peptide-calculator-page .example-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  #peptide-calculator-page .calculator-container { padding: 8px 5px; margin: 0 2px; }
  #peptide-calculator-page .step-section { padding: 10px; margin-bottom: 14px; }
  #peptide-calculator-page .peptide-buttons { gap: 6px; }
  #peptide-calculator-page .peptide-btn { padding: 8px 2px; font-size: 11px; min-height: 44px; }
  #peptide-calculator-page .ukp-hero { padding: 16px 12px; }
  #peptide-calculator-page .ukp-hero h1 { font-size: 20px; }
}