/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 2px solid var(--c-rose-line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 72px;
}

.site-nav {
  display: flex;
  gap: 28px;
  margin-inline: auto;
}

.site-nav a {
  text-decoration: none;
  color: var(--c-ink-strong);
  font-size: var(--fs-small);
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--c-brand);
}

.site-header__cta {
  min-height: 44px;
  padding-inline: 20px;
  font-size: 0.875rem;
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--c-brand);
  color: var(--c-on-brand);
  padding-block: clamp(48px, 6vw, 88px) clamp(56px, 7vw, 104px);
}

.hero::before,
.hero::after {
  content: '';
  position: absolute;
  border: 2px solid rgba(255, 255, 255, 0.14);
  border-radius: 50%;
  pointer-events: none;
}

.hero::before {
  width: 34px;
  height: 34px;
  left: 3%;
  top: 40px;
}

.hero::after {
  width: 22px;
  height: 22px;
  left: 6.5%;
  top: 120px;
}

.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 477px);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.hero__copy {
  display: grid;
  gap: 22px;
  justify-items: start;
  padding-top: 8px;
}

.hero h1 {
  font-size: var(--fs-hero);
  line-height: 1.08;
  letter-spacing: -0.025em;
  max-width: 13ch;
}

.hero__lead {
  max-width: 34rem;
  color: rgba(255, 255, 255, 0.92);
  font-size: 1.0625rem;
}

.hero__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero__pills li {
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--c-on-brand-glass);
  border: 1px solid var(--c-on-brand-edge);
  font-size: var(--fs-small);
  font-weight: 500;
}

.hero__cta {
  margin-top: 6px;
  min-height: 54px;
  padding-inline: 32px;
}

/* ---------- calculator ---------- */
.calc {
  display: grid;
  gap: 22px;
  padding: clamp(22px, 2.6vw, 32px);
  border-radius: var(--radius-l);
  background: var(--c-surface);
  color: var(--c-ink-calc);
  box-shadow: var(--shadow-card);
}

.calc__title {
  font-size: 1.45rem;
  color: var(--c-ink-calc);
}

.calc__field {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  border: 0;
  min-width: 0;
}

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

.calc__label {
  color: var(--c-muted-calc);
  font-size: var(--fs-small);
  font-weight: 500;
}

.calc__value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.625rem;
  color: var(--c-brand);
  white-space: nowrap;
}

.calc__range {
  width: 100%;
  height: 24px;
  margin: 0;
  background: transparent;
  appearance: none;
  --pct: 9.1%;
}

.calc__range::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(to right, var(--c-brand) var(--pct), var(--c-track) var(--pct));
}

.calc__range::-moz-range-track {
  height: 6px;
  border-radius: 999px;
  background: var(--c-track);
}

.calc__range::-moz-range-progress {
  height: 6px;
  border-radius: 999px;
  background: var(--c-brand);
}

.calc__range::-webkit-slider-thumb {
  appearance: none;
  width: 22px;
  height: 22px;
  margin-top: -8px;
  border-radius: 50%;
  border: 3px solid var(--c-surface);
  background: var(--c-brand);
  box-shadow: 0 2px 8px rgba(212, 0, 32, 0.35);
  cursor: grab;
}

.calc__range::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 3px solid var(--c-surface);
  background: var(--c-brand);
  box-shadow: 0 2px 8px rgba(212, 0, 32, 0.35);
  cursor: grab;
}

.calc__limits {
  display: flex;
  justify-content: space-between;
  color: var(--c-hint);
  font-size: 0.75rem;
}

.segmented {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  border: 1.5px solid var(--c-brand);
  border-radius: var(--radius-s);
  overflow: hidden;
}

.segmented__btn {
  min-height: 40px;
  color: var(--c-brand);
  font-family: var(--font-display);
  font-size: var(--fs-small);
  font-weight: 600;
  border-right: 1.5px solid var(--c-brand);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.segmented__btn:last-child {
  border-right: 0;
}

.segmented__btn:hover {
  background: var(--c-rose);
}

.segmented__btn[aria-checked='true'] {
  background: var(--c-brand);
  color: var(--c-on-brand);
}

.segmented__btn:focus-visible {
  outline-offset: -4px;
}

.calc__result {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 18px 20px;
  border-radius: var(--radius-m);
  background: var(--c-rose-deep);
}

.calc__result-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
}

.calc__result-row dt {
  color: var(--c-ink-calc);
  font-size: var(--fs-small);
}

.calc__result-row dd {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  white-space: nowrap;
}

.calc__result-row--total dt {
  color: var(--c-ink-calc);
  font-weight: 500;
}

.calc__result-row--total dd {
  font-size: 1.375rem;
  font-weight: 700;
}

.calc__note {
  text-align: center;
  color: var(--c-hint);
  font-size: 0.75rem;
  line-height: 1.45;
}

/* ---------- features ---------- */
.feature-grid,
.steps,
.cat-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 24px;
  border: 1px solid var(--c-rose-line);
  border-radius: var(--radius-m);
  background: var(--c-surface);
}

.feature h3 {
  font-size: var(--fs-h3);
}

.feature p {
  color: var(--c-muted);
  font-size: var(--fs-small);
}

.feature__icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--c-rose);
  position: relative;
  margin-bottom: 4px;
}

.feature__icon::after {
  content: '';
  position: absolute;
  left: 16px;
  top: 11px;
  width: 8px;
  height: 15px;
  border: solid var(--c-brand);
  border-width: 0 2.5px 2.5px 0;
  transform: rotate(45deg);
}

/* ---------- steps ---------- */
.steps {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  counter-reset: step;
}

.step {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 24px;
  border-radius: var(--radius-m);
  background: var(--c-surface);
}

.step__num {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--c-brand);
  color: var(--c-on-brand);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-small);
  margin-bottom: 6px;
}

.step h3 {
  font-size: var(--fs-h3);
}

.step p {
  color: var(--c-muted);
  font-size: var(--fs-small);
}

/* ---------- categories ---------- */
.cat-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.cat {
  display: grid;
  gap: 14px;
  justify-items: center;
  align-content: center;
  min-height: 171px;
  padding: 24px 14px;
  border-radius: var(--radius-m);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  text-align: center;
  font-size: var(--fs-small);
  font-weight: 500;
  line-height: 1.35;
  transition: background-color 0.15s ease;
}

.cat:hover {
  background: rgba(255, 255, 255, 0.18);
}

.cat__icon {
  height: 44px;
  width: auto;
  color: var(--c-on-brand);
}

/* ---------- stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
}

.stat {
  display: grid;
  gap: 8px;
  padding: 24px;
  min-height: 146px;
  border-radius: var(--radius-m);
  background: var(--c-rose);
}

.stat dt {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.375rem;
  color: var(--c-brand);
  letter-spacing: -0.01em;
}

.stat dd {
  margin: 0;
  color: var(--c-muted);
  font-size: var(--fs-small);
}

/* ---------- faq ---------- */
.faq {
  display: grid;
  gap: 12px;
  max-width: 820px;
}

.faq__item {
  border-radius: var(--radius-s);
  background: var(--c-surface);
  border: 1px solid transparent;
  transition: border-color 0.15s ease;
}

.faq__item[open] {
  border-color: var(--c-rose-line);
}

.faq__item summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  min-height: 65px;
  padding: 18px 24px;
  cursor: pointer;
  list-style: none;
  color: var(--c-ink-strong);
  font-weight: 500;
  font-size: 0.9375rem;
}

.faq__item summary::-webkit-details-marker {
  display: none;
}

.faq__item summary::after {
  content: '';
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  border: solid var(--c-brand);
  border-width: 0 3px 3px 0;
  transform: rotate(45deg) translateY(-4px);
  transition: transform 0.2s ease;
}

.faq__item[open] summary::after {
  transform: rotate(-135deg) translateY(-2px);
}

.faq__item p {
  padding: 0 24px 20px;
  color: var(--c-ink-strong);
  font-size: var(--fs-small);
  max-width: 62ch;
}

/* ---------- cta ---------- */
.cta {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-content: center;
  min-height: 416px;
  padding: clamp(28px, 4vw, 48px);
  border-radius: var(--radius-l);
  background: var(--c-brand);
  color: var(--c-on-brand);
}

.cta::before {
  content: '';
  position: absolute;
  right: -80px;
  top: -140px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  pointer-events: none;
}

.cta__copy {
  position: relative;
  display: grid;
  gap: 14px;
  max-width: 34rem;
}

.cta h2 {
  font-size: clamp(1.6rem, 1.2rem + 1.2vw, 2.25rem);
}

.cta__copy p {
  color: rgba(255, 255, 255, 0.88);
}

.cta__contacts {
  line-height: 1.7;
}

.cta__contacts a {
  color: var(--c-on-brand);
  text-decoration: none;
  font-weight: 500;
}

/* ---------- footer ---------- */
.site-footer {
  background: var(--c-footer);
  padding-block: 60px 28px;
  color: var(--c-footer-text);
  font-size: var(--fs-small);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.36fr) minmax(0, 1fr) minmax(0, 0.9fr);
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--c-line);
}

.site-footer__brand {
  display: grid;
  gap: 14px;
  justify-items: start;
  max-width: 34rem;
}

.site-footer__col {
  display: grid;
  gap: 8px;
  align-content: start;
  justify-items: start;
}

.site-footer__col h3 {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-footer-text);
  margin-bottom: 4px;
}

.site-footer__col a {
  text-decoration: none;
}

.site-footer__col a:hover {
  color: var(--c-brand);
}

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding-top: 20px;
  font-size: 0.75rem;
  color: var(--c-footer-muted);
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.site-footer__links a {
  text-decoration: none;
}

.site-footer__links a:hover {
  color: var(--c-brand);
}

/* ---------- responsive ---------- */
@media (max-width: 1024px) {
  .feature-grid,
  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .cat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 880px) {
  .site-nav {
    display: none;
  }
  .site-header__inner {
    justify-content: space-between;
  }
  .hero__inner {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero h1 {
    max-width: none;
  }
  .calc {
    max-width: 520px;
  }
  .site-footer__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  .site-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .feature-grid,
  .steps,
  .stats {
    grid-template-columns: minmax(0, 1fr);
  }
  .cat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .site-header__cta {
    padding-inline: 14px;
  }
  .segmented__btn {
    font-size: 0.8125rem;
  }
}