.calc-page {
  background:
    radial-gradient(circle at 15% 15%, rgba(6, 182, 212, 0.24), transparent 35%),
    radial-gradient(circle at 85% 10%, rgba(99, 102, 241, 0.18), transparent 32%),
    radial-gradient(circle at 70% 82%, rgba(16, 185, 129, 0.12), transparent 34%),
    linear-gradient(180deg, #eef9ff 0%, #f8fcff 45%, #f4f8fc 100%);
  position: relative;
  overflow-x: clip;
}

.calc-page::before,
.calc-page::after {
  content: '';
  position: fixed;
  top: 0;
  bottom: 0;
  width: 72px;
  pointer-events: none;
  z-index: 0;
}

.calc-page::before {
  left: 0;
  background:
    radial-gradient(circle at 20% 18%, rgba(6,182,212,.22), transparent 55%),
    radial-gradient(circle at 40% 64%, rgba(56,189,248,.16), transparent 52%);
}

.calc-page::after {
  right: 0;
  background:
    radial-gradient(circle at 80% 20%, rgba(99,102,241,.2), transparent 58%),
    radial-gradient(circle at 70% 72%, rgba(16,185,129,.14), transparent 54%);
}

.calc-shell {
  max-width: 980px;
  margin: 0 auto;
  padding: 1.8rem 1.05rem 3.6rem;
  position: relative;
  z-index: 1;
}

.calc-hero {
  background:
    linear-gradient(135deg, rgba(10, 36, 64, 0.96), rgba(8, 145, 178, 0.88) 55%, rgba(56, 189, 248, 0.78));
  color: #fff;
  border-radius: 18px;
  padding: 2.2rem;
  margin-bottom: 1rem;
  box-shadow: 0 18px 40px rgba(15, 36, 64, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.calc-title { font-size: 2.1rem; margin-bottom: .5rem; letter-spacing: -0.01em; }
.calc-subtitle { opacity: .94; max-width: 760px; font-size: 1.03rem; }

.calc-layout {
  display: block;
  max-width: 860px;
  margin: 0 auto;
}

.calc-prescription {
  max-width: 860px;
  margin: 1rem auto 0;
}

.calc-panel {
  background: rgba(255, 255, 255, 0.93);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(8, 145, 178, 0.2);
  border-radius: 16px;
  padding: .95rem;
  box-shadow: 0 14px 28px rgba(15, 36, 64, 0.1);
}

.calc-mini-faq {
  margin-top: .85rem;
  border-top: 1px solid var(--color-gray-100);
  padding-top: .75rem;
}

.calc-mini-faq details {
  border: 1px solid rgba(8, 145, 178, 0.16);
  border-radius: 8px;
  padding: .5rem .65rem;
  margin-bottom: .45rem;
  background: #fff;
}

.calc-mini-faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-navy);
  font-size: .88rem;
}

.calc-mini-faq p {
  margin: .4rem 0 0;
  color: var(--color-gray-600);
  font-size: .84rem;
  line-height: 1.4;
}

.calc-panel h2 { font-size: 1.1rem; margin-bottom: .55rem; color: var(--color-navy); }
.calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }

.calc-top-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .65rem;
  align-items: start;
}

.calc-control-card {
  border: 1px solid rgba(8,145,178,.2);
  border-radius: 12px;
  padding: .5rem .55rem;
  background: linear-gradient(180deg, rgba(236,254,255,.82), #fff);
}

.calc-confidence-card {
  grid-column: 2;
}

.calc-control-card input[type="range"] {
  width: 100%;
  display: block;
}

.calc-volume-card #volumePreset {
  width: 100%;
  margin: 0;
}

.calc-field label { display:block; font-size:.85rem; font-weight:600; margin-bottom:.25rem; color: var(--color-navy); }
.calc-field input, .calc-field select {
  width:100%;
  padding:.65rem .7rem;
  border:1px solid rgba(8, 145, 178, 0.2);
  border-radius:10px;
  background: #fff;
}

.calc-field input:focus,
.calc-field select:focus {
  outline: none;
  border-color: var(--color-teal);
  box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.12);
}

.calc-switches { display:flex; gap:.5rem; flex-wrap:wrap; margin-bottom:.75rem; }
.calc-chip {
  border:1px solid rgba(8, 145, 178, 0.2);
  border-radius:999px;
  padding:.42rem .85rem;
  cursor:pointer;
  background:#fff;
  font-weight: 600;
  color: var(--color-navy);
}
.calc-chip.active {
  border-color: var(--color-teal);
  background: linear-gradient(135deg, rgba(8, 145, 178, 0.24), rgba(6, 182, 212, 0.2));
  color: #0b3f55;
}

.calc-dose-toggle {
  display: flex;
  align-items: center;
  gap: .4rem;
  flex-wrap: wrap;
  margin: .2rem 0 .55rem;
}

.calc-range-chip {
  display: inline-block;
  margin-left: .35rem;
  border: 1px solid rgba(8, 145, 178, .3);
  color: #0f3b52;
  background: rgba(236, 254, 255, .9);
  border-radius: 999px;
  padding: .12rem .45rem;
  font-size: .72rem;
  font-weight: 600;
}

.calc-slider-row { margin:.35rem 0 .75rem; }
.calc-slider-label { font-size: .82rem; color: var(--color-gray-600); margin-bottom:.25rem; display:block; }
.calc-confidence-labels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .25rem;
  margin-top: .22rem;
  font-size: .68rem;
  color: var(--color-gray-600);
}
.calc-confidence-labels span:nth-child(2) { text-align: center; }
.calc-confidence-labels span:nth-child(3) { text-align: right; }

.calc-volume-card #volumePresetLabel,
.calc-confidence-card #testConfidenceText {
  margin-top: .22rem;
}

.calc-how-panel {
  margin-top: .7rem;
  border: 1px solid rgba(8,145,178,.2);
  border-radius: 10px;
  padding: .6rem .7rem;
  background: linear-gradient(180deg, rgba(236,254,255,.8), #fff);
}

.calc-how-panel summary {
  cursor: pointer;
  font-weight: 700;
  color: #0f3b52;
}

.calc-how-panel ul {
  margin: .55rem 0 .35rem;
  padding-left: 1.1rem;
}

.calc-email-form {
  display: grid;
  gap: .5rem;
  margin-top: .45rem;
}

.calc-email-form input[type="text"],
.calc-email-form input[type="email"] {
  width: 100%;
  border: 1px solid rgba(8,145,178,.24);
  border-radius: 10px;
  padding: .62rem .7rem;
}

.calc-consent {
  display: flex;
  gap: .45rem;
  align-items: flex-start;
  font-size: .8rem;
  color: var(--color-gray-600);
}
.calc-range-legend {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .25rem;
  margin-top: .4rem;
  font-size: .75rem;
  color: var(--color-gray-600);
}
.calc-range-legend span { text-align: center; }

.calc-actions { display:flex; gap:.5rem; margin-top: .75rem; flex-wrap:wrap; }
.calc-actions .btn {
  border-radius: 10px;
}

.calc-warning {
  background: linear-gradient(135deg, #fff7ed, #ffedd5);
  border:1px solid #fdba74;
  color:#9a3412;
  border-radius:10px;
  padding:.62rem .74rem;
  font-size:.85rem;
  margin-bottom:.5rem;
}

.calc-success {
  background: linear-gradient(135deg, #ecfdf5, #d1fae5);
  border:1px solid #6ee7b7;
  color:#065f46;
  border-radius:10px;
  padding:.62rem .74rem;
  font-size:.85rem;
  margin-bottom:.5rem;
}

.calc-result-card {
  border:1px solid rgba(6, 182, 212, 0.24);
  border-left: 5px solid var(--color-teal);
  border-radius:12px;
  padding:.9rem;
  margin-bottom:.7rem;
  background: linear-gradient(180deg, #ffffff, #f3fbff);
  box-shadow: 0 10px 20px rgba(6, 43, 73, 0.07);
}

.calc-summary-card {
  border: 1px solid rgba(8, 145, 178, 0.2);
  border-left-width: 6px;
  border-radius: 12px;
  padding: .8rem;
  margin-bottom: .7rem;
  background: #f8fdff;
}

.calc-summary-card--balanced {
  border-left-color: #10b981;
  background: linear-gradient(180deg, #f0fdf4, #ecfdf5);
}

.calc-summary-card--attention {
  border-left-color: #f59e0b;
  background: linear-gradient(180deg, #fffbeb, #fff7ed);
}

.calc-summary-card--critical {
  border-left-color: #ef4444;
  background: linear-gradient(180deg, #fef2f2, #fff1f2);
}

.calc-result-card h3 { font-size:1rem; margin-bottom:.3rem; color:var(--color-navy); }
.calc-result-meta { font-size:.85rem; color:var(--color-gray-600); }

.calc-result-meta + .calc-result-meta { margin-top: .25rem; }
.calc-section-title {
  margin: .75rem 0 .45rem;
  font-size: .9rem;
  color: var(--color-navy);
}

.calc-ingredients,
.calc-procedure {
  margin: 0;
  padding-left: 1.1rem;
}

.calc-ingredient-item {
  margin-bottom: .6rem;
  padding: .45rem .5rem;
  border-radius: 10px;
  background: rgba(255,255,255,.78);
  border: 1px solid rgba(8,145,178,.14);
}

.calc-why-btn {
  margin-left: .5rem;
  border: 1px solid rgba(8, 145, 178, .25);
  background: #fff;
  color: #0b3f55;
  border-radius: 999px;
  font-size: .72rem;
  padding: .2rem .5rem;
  cursor: pointer;
}

.calc-why-bubble {
  margin-top: .35rem;
  background: linear-gradient(180deg, #ecfeff, #e7f9ff);
  border: 1px solid rgba(8, 145, 178, .25);
  border-radius: 8px;
  padding: .45rem .55rem;
  font-size: .8rem;
  color: #0f3b52;
}

.calc-math-btn {
  margin-top: .35rem;
  border: 1px solid rgba(8, 145, 178, .3);
  background: #fff;
  color: #0b3f55;
  border-radius: 999px;
  font-size: .72rem;
  padding: .15rem .5rem;
  cursor: pointer;
}

.calc-math {
  margin-top: .35rem;
  padding: .35rem .45rem;
  border-radius: 8px;
  background: rgba(255,255,255,.85);
  border: 1px dashed rgba(8,145,178,.35);
  font-size: .75rem;
  color: #0f3b52;
  line-height: 1.35;
}

.calc-assumptions { font-size:.82rem; color:var(--color-gray-600); margin-top:.4rem; }

.calc-help {
  margin-top: .55rem;
  border-top: 1px solid var(--color-gray-100);
  padding-top: .6rem;
}

.calc-help-card {
  background: linear-gradient(135deg, #ecfeff, #f0f9ff);
  border:1px solid rgba(8,145,178,.28);
  border-radius:10px;
  padding:.85rem;
  margin-top:.5rem;
}

.calc-details details {
  border:1px solid rgba(8, 145, 178, 0.16);
  border-radius:8px;
  padding:.55rem .7rem;
  margin-bottom:.45rem;
  background:#ffffff;
}

@media (max-width: 900px) {
  .calc-shell {
    padding: 1.25rem .82rem 2.8rem;
  }

  .calc-hero {
    padding: 1.3rem;
  }

  .calc-title {
    font-size: 1.65rem;
  }

  .calc-subtitle {
    font-size: .95rem;
  }

  .calc-grid {
    grid-template-columns: 1fr;
  }

  .calc-top-controls {
    grid-template-columns: 1fr;
    gap: .45rem;
  }

  .calc-actions {
    gap: .4rem;
  }

  .calc-actions .btn {
    width: 100%;
  }

  .calc-dose-toggle .calc-chip {
    padding: .38rem .65rem;
  }

  .calc-range-chip {
    margin-left: 0;
    margin-top: .2rem;
  }

  .calc-confidence-labels {
    font-size: .68rem;
  }

  .calc-page::before,
  .calc-page::after {
    display: none;
  }
}