:root {
  --sleep-bg-top: #f9fcff;
  --sleep-bg-bottom: #edf5fb;
  --sleep-surface: #ffffff;
  --sleep-panel: rgba(255, 255, 255, 0.82);
  --sleep-ink: #18344d;
  --sleep-muted: #58708a;
  --sleep-line: rgba(24, 52, 77, 0.16);
  --sleep-accent: #0c5a94;
  --sleep-accent-strong: #0a4a79;
  --sleep-accent-soft: #e5f1fa;
  --sleep-shadow: 0 24px 60px rgba(12, 57, 90, 0.12);
  --sleep-radius-xl: 28px;
  --sleep-radius-lg: 22px;
  --sleep-radius-md: 16px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  color: var(--sleep-ink);
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(12, 90, 148, 0.12), transparent 32%),
    radial-gradient(circle at bottom right, rgba(18, 113, 166, 0.09), transparent 28%),
    linear-gradient(180deg, var(--sleep-bg-top) 0%, var(--sleep-bg-bottom) 100%);
}

.sleep-page {
  padding: clamp(24px, 5vw, 64px);
}

.sleep-calculator {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.92fr);
  gap: clamp(28px, 4vw, 56px);
  max-width: 1360px;
  margin: 0 auto;
  padding: clamp(28px, 4vw, 52px);
  border-radius: 36px;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.76));
  box-shadow: var(--sleep-shadow);
}

.sleep-calculator::before,
.sleep-calculator::after {
  position: absolute;
  content: "";
  border-radius: 999px;
  pointer-events: none;
}

.sleep-calculator::before {
  top: -120px;
  right: -120px;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(12, 90, 148, 0.16), rgba(12, 90, 148, 0));
}

.sleep-calculator::after {
  bottom: -140px;
  left: -80px;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(23, 141, 201, 0.14), rgba(23, 141, 201, 0));
}

.sleep-calculator__copy,
.sleep-calculator__panel {
  position: relative;
  z-index: 1;
}

.sleep-calculator__eyebrow {
  margin: 0 0 12px;
  color: var(--sleep-accent);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.sleep-calculator h1 {
  margin: 0 0 18px;
  color: var(--sleep-accent-strong);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  line-height: 0.95;
}

.sleep-calculator__lead {
  max-width: 38rem;
  margin: 0 0 16px;
  color: var(--sleep-ink);
  font-size: clamp(1.05rem, 1.4vw, 1.35rem);
  line-height: 1.7;
}

.sleep-calculator__note {
  max-width: 34rem;
  margin: 0 0 24px;
  color: var(--sleep-muted);
  font-size: 1rem;
  line-height: 1.7;
}

.sleep-calculator__guide {
  max-width: 42rem;
  padding: 24px;
  border: 1px solid rgba(12, 90, 148, 0.12);
  border-radius: var(--sleep-radius-lg);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(8px);
}

.sleep-calculator__guide h2 {
  margin: 0 0 16px;
  font-size: 1.28rem;
}

.sleep-calculator__guide ul {
  margin: 0;
  padding-left: 20px;
  color: var(--sleep-ink);
  line-height: 1.8;
}

.sleep-calculator__seo-block {
  max-width: 42rem;
  margin-top: 20px;
  padding: 24px;
  border: 1px solid rgba(12, 90, 148, 0.1);
  border-radius: var(--sleep-radius-lg);
  background: rgba(255, 255, 255, 0.6);
}

.sleep-calculator__seo-block h2 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.sleep-calculator__seo-block p {
  margin: 0 0 12px;
  line-height: 1.75;
}

.sleep-calculator__seo-block p:last-child {
  margin-bottom: 0;
}

.sleep-calculator__panel {
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid rgba(12, 90, 148, 0.1);
  border-radius: calc(var(--sleep-radius-xl) + 4px);
  background: var(--sleep-panel);
  backdrop-filter: blur(12px);
}

.calculator-form {
  display: grid;
  gap: 18px;
}

.field-group {
  position: relative;
}

.field-group label {
  position: absolute;
  top: -0.62rem;
  left: 1rem;
  z-index: 1;
  padding: 0 0.55rem;
  color: var(--sleep-accent-strong);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--sleep-surface);
}

.field-group select,
.field-group input {
  width: 100%;
  min-height: 78px;
  padding: 24px 20px 18px;
  border: 2px solid var(--sleep-line);
  border-radius: var(--sleep-radius-lg);
  outline: none;
  color: var(--sleep-ink);
  font: inherit;
  font-size: 1.05rem;
  background: var(--sleep-surface);
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.field-group select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--sleep-accent) 50%),
    linear-gradient(135deg, var(--sleep-accent) 50%, transparent 50%);
  background-position:
    calc(100% - 22px) calc(50% - 2px),
    calc(100% - 14px) calc(50% - 2px);
  background-size: 8px 8px, 8px 8px;
  background-repeat: no-repeat;
}

.field-group select:focus,
.field-group input:focus {
  border-color: rgba(12, 90, 148, 0.5);
  box-shadow: 0 0 0 4px rgba(12, 90, 148, 0.12);
  transform: translateY(-1px);
}

.calculator-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 8px;
}

.btn {
  min-width: 156px;
  min-height: 56px;
  padding: 14px 22px;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  font: inherit;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--sleep-accent) 0%, var(--sleep-accent-strong) 100%);
  box-shadow: 0 16px 28px rgba(12, 90, 148, 0.22);
}

.btn--ghost {
  color: var(--sleep-accent-strong);
  border-color: rgba(12, 90, 148, 0.35);
  background: rgba(255, 255, 255, 0.72);
}

.form-message {
  min-height: 24px;
  margin: 0;
  color: #b91c1c;
  font-size: 0.96rem;
}

.calculator-result {
  margin-top: 18px;
  animation: sleep-rise 280ms ease;
}

.calculator-result.is-hidden {
  display: none;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.result-card {
  padding: 20px;
  border: 1px solid rgba(12, 90, 148, 0.12);
  border-radius: var(--sleep-radius-lg);
  background: rgba(255, 255, 255, 0.9);
}

.result-card--range {
  padding: 24px;
  background: linear-gradient(135deg, rgba(12, 90, 148, 0.07), rgba(12, 90, 148, 0.02));
}

.result-label {
  margin: 0 0 12px;
  color: var(--sleep-muted);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.result-range {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  color: var(--sleep-accent-strong);
  font-size: clamp(1.8rem, 3.2vw, 3rem);
  font-weight: 900;
  line-height: 1.1;
}

.result-range__divider {
  color: var(--sleep-muted);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
}

.result-caption,
.result-detail {
  margin: 10px 0 0;
  color: var(--sleep-muted);
  line-height: 1.6;
}

.result-target {
  margin: 0;
  color: var(--sleep-accent-strong);
  font-size: clamp(2rem, 3vw, 2.75rem);
  font-weight: 900;
  line-height: 1.05;
}

.suggestion-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.suggestion-chip {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--sleep-accent-strong);
  background: var(--sleep-accent-soft);
}

.suggestion-chip strong {
  display: block;
  font-size: 1rem;
}

.suggestion-chip span {
  color: var(--sleep-muted);
  font-size: 0.84rem;
}

.calculator-footer-actions {
  margin-top: 18px;
}

.btn--site {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 54px;
  color: var(--sleep-accent-strong);
  text-decoration: none;
  border-color: rgba(12, 90, 148, 0.2);
  background: rgba(229, 241, 250, 0.9);
}

.sleep-faq {
  max-width: 1360px;
  margin: 24px auto 0;
}

.sleep-faq__inner {
  padding: clamp(24px, 4vw, 36px);
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--sleep-shadow);
}

.sleep-faq__inner h2 {
  margin: 0 0 18px;
  color: var(--sleep-accent-strong);
  font-size: clamp(1.7rem, 2.8vw, 2.3rem);
}

.sleep-faq__item {
  padding: 18px 0;
  border-top: 1px solid rgba(12, 90, 148, 0.1);
}

.sleep-faq__item:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.sleep-faq__item h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
}

.sleep-faq__item p {
  margin: 0;
  line-height: 1.75;
  color: var(--sleep-muted);
}

@keyframes sleep-rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1024px) {
  .sleep-calculator {
    grid-template-columns: 1fr;
  }

  .sleep-calculator__copy {
    order: 2;
  }

  .sleep-calculator__panel {
    order: 1;
  }
}

@media (max-width: 640px) {
  .sleep-page {
    padding: 16px;
  }

  .sleep-calculator {
    padding: 18px;
    border-radius: 28px;
  }

  .sleep-calculator__guide {
    padding: 18px;
  }

  .sleep-calculator__seo-block {
    padding: 18px;
  }

  .field-group select,
  .field-group input {
    min-height: 70px;
  }

  .calculator-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

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

  .sleep-faq__inner {
    border-radius: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}