/* ══════════════════════════════════════════════════════
   ACTIVA – Formules de calcul page styles
══════════════════════════════════════════════════════ */

/* ── Layout ─────────────────────────────────── */
.calc-main {
  padding-top: 72px; /* navbar height */
}

/* ── Hero ───────────────────────────────────── */
.calc-hero {
  background: linear-gradient(135deg, var(--black-light) 0%, #1e1a4a 100%);
  padding: 72px 0 56px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.calc-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      ellipse 60% 50% at 30% 50%,
      rgba(113, 104, 211, 0.18) 0%,
      transparent 70%
    ),
    radial-gradient(
      ellipse 50% 60% at 75% 30%,
      rgba(127, 228, 240, 0.1) 0%,
      transparent 60%
    );
  pointer-events: none;
}

.calc-hero > .container {
  position: relative;
  z-index: 1;
}

.calc-back-link {
  display: inline-block;
  color: rgba(255, 255, 255, 0.45);
  font-size: 0.88rem;
  text-decoration: none;
  margin-bottom: 24px;
  transition: color var(--transition);
}

.calc-back-link:hover {
  color: var(--violet-light);
}

.calc-hero .section-badge {
  margin: 0 auto 20px;
}

.calc-hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 20px;
}

.calc-hero-subtitle {
  max-width: 620px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.55);
  font-size: 1.05rem;
  line-height: 1.65;
}

/* ── Sections ───────────────────────────────── */
.calc-section {
  padding: 72px 0;
  background: var(--white);
}

.calc-section-alt {
  background: linear-gradient(180deg, #fbfaff 0%, #f5f3fe 100%);
  border-top: 1px solid var(--violet-bg-d);
  border-bottom: 1px solid var(--violet-bg-d);
}

/* ── Card header ────────────────────────────── */
.calc-card-header {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 24px;
}

.calc-card-icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.calc-icon-imc {
  background: rgba(113, 104, 211, 0.12);
  color: var(--violet-dark);
}
.calc-icon-water {
  background: rgba(127, 228, 240, 0.15);
  color: #2c98ba;
}
.calc-icon-bmr {
  background: rgba(255, 205, 29, 0.12);
  color: #b88c00;
}
.calc-icon-tdee {
  background: rgba(87, 177, 56, 0.12);
  color: var(--green);
}

.calc-card-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--black-light);
  margin-bottom: 4px;
}

.calc-card-source {
  font-size: 0.82rem;
  color: var(--grey-text);
  font-style: italic;
}

/* ── Description ────────────────────────────── */
.calc-desc {
  font-size: 0.97rem;
  color: #4a4a6a;
  line-height: 1.7;
  max-width: 800px;
  margin-bottom: 36px;
}

/* ── Formula box ────────────────────────────── */
.calc-formula-box {
  background: linear-gradient(135deg, #f7f6ff 0%, #eeeafe 100%);
  border: 1.5px solid rgba(113, 104, 211, 0.25);
  border-radius: 16px;
  padding: 28px 32px;
  margin-bottom: 32px;
}

.calc-formula-box--dark {
  background: linear-gradient(135deg, var(--black-light) 0%, #1e1a4a 100%);
  border-color: rgba(113, 104, 211, 0.4);
}

.calc-formula-box--dark .calc-formula-label {
  color: var(--violet-light);
}

.calc-formula-box--dark .calc-formula-main {
  color: var(--white);
}

.calc-formula-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--violet-dark);
  margin-bottom: 10px;
}

.calc-formula-main {
  font-family: "Barlow", monospace;
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  font-weight: 700;
  color: var(--black-light);
  letter-spacing: -0.01em;
}

.calc-formula-main--sm {
  font-size: clamp(0.88rem, 2vw, 1.1rem);
}

.calc-formula-example {
  margin-top: 12px;
  font-size: 0.88rem;
  color: #6060a0;
  font-style: italic;
}

.calc-formula-units {
  font-size: 0.82rem;
  color: var(--grey-text);
  font-style: italic;
  margin-bottom: 20px;
  text-align: center;
}

.calc-formula-example-block {
  background: rgba(113, 104, 211, 0.06);
  border-left: 3px solid var(--violet-dark);
  border-radius: 0 8px 8px 0;
  padding: 14px 20px;
  font-size: 0.9rem;
  color: #4a4a6a;
  font-style: italic;
  margin-top: 16px;
}

.calc-bmr-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 12px;
}

/* ── Scale / categories ─────────────────────── */
.calc-scale-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--black-light);
  margin-bottom: 16px;
}

.calc-scale-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}

.calc-scale-item {
  border-radius: 14px;
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border: 1.5px solid transparent;
  position: relative;
}

.scale-range-val {
  font-size: 1.25rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.scale-label {
  font-size: 0.85rem;
  font-weight: 500;
}

.scale-check {
  position: absolute;
  top: 12px;
  right: 14px;
  font-size: 1rem;
  font-weight: 700;
}

.calc-scale-item.scale-low {
  background: rgba(127, 228, 240, 0.12);
  border-color: rgba(127, 228, 240, 0.3);
  color: #0e6b7a;
}
.calc-scale-item.scale-ok {
  background: rgba(87, 177, 56, 0.12);
  border-color: rgba(87, 177, 56, 0.35);
  color: #2d6e18;
}
.calc-scale-item.scale-warn {
  background: rgba(255, 205, 29, 0.12);
  border-color: rgba(255, 205, 29, 0.35);
  color: #7a5a00;
}
.calc-scale-item.scale-high {
  background: rgba(235, 91, 228, 0.1);
  border-color: rgba(235, 91, 228, 0.3);
  color: #8a0d84;
}

/* ── Water cards ────────────────────────────── */
.calc-water-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 480px;
  margin: 0 auto 28px;
}

.calc-water-card {
  border-radius: 20px;
  padding: 32px 24px;
  text-align: center;
  border: 1.5px solid transparent;
}

.water-woman {
  background: rgba(127, 228, 240, 0.1);
  border-color: rgba(127, 228, 240, 0.35);
  color: #0e6b7a;
}

.water-man {
  background: rgba(113, 104, 211, 0.1);
  border-color: rgba(113, 104, 211, 0.35);
  color: var(--violet-dark);
}

.water-symbol {
  font-size: 1.8rem;
  margin-bottom: 8px;
  opacity: 0.7;
}

.water-value {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 4px;
}

.water-period {
  font-size: 0.88rem;
  opacity: 0.65;
  margin-bottom: 10px;
}

.water-label {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.7;
}

/* ── Activity coefficients ──────────────────── */
.calc-activity-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 24px;
}

.calc-activity-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--white);
  border: 1px solid var(--violet-bg-d);
  border-radius: 14px;
  padding: 18px 20px;
  box-shadow: 0 2px 12px rgba(113, 104, 211, 0.06);
}

.calc-section .calc-activity-item {
  background: linear-gradient(135deg, #fbfaff 0%, #f5f3fe 100%);
}

.activity-coef {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--violet-dark);
  min-width: 52px;
  text-align: center;
}

.activity-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.activity-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--black-light);
}

.activity-desc {
  font-size: 0.8rem;
  color: var(--grey-text);
}

/* ── Note ───────────────────────────────────── */
.calc-note {
  background: rgba(113, 104, 211, 0.06);
  border: 1px solid rgba(113, 104, 211, 0.15);
  border-radius: 12px;
  padding: 16px 20px;
  font-size: 0.88rem;
  color: #4a4a6a;
  line-height: 1.6;
  margin-top: 12px;
}

/* ── CTA section ────────────────────────────── */
.calc-cta {
  background: linear-gradient(135deg, var(--black-light) 0%, #1e1a4a 100%);
  padding: 80px 0;
  text-align: center;
}

.calc-cta-text {
  font-size: 1rem;
  color: var(--violet-light);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 16px;
}

.calc-cta-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 36px;
}

.calc-cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* ── Footer minimal ─────────────────────────── */
.calc-footer-minimal {
  padding: 24px 0;
}

.calc-footer-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-sep {
  color: rgba(255, 255, 255, 0.2);
}

.calc-footer-rights {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.35);
}

.calc-footer-link {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  transition: color var(--transition);
}

.calc-footer-link:hover {
  color: var(--violet-light);
}

/* ── Responsive ─────────────────────────────── */
@media (max-width: 900px) {
  .calc-scale-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .calc-hero {
    padding: 56px 0 40px;
  }

  .calc-card-header {
    flex-direction: column;
    gap: 12px;
  }

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

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

  .calc-water-grid {
    grid-template-columns: 1fr 1fr;
    max-width: 100%;
  }

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

  .calc-formula-box {
    padding: 20px;
  }
}