:root {
  --color-primary: #c41e3a;
  --color-primary-dark: #9a1830;
  --color-accent: #1a6b5c;
  --color-accent-light: #e8f5f2;
  --color-bg: #f8f9fb;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 20px 48px rgba(15, 23, 42, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --max-width: 1140px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.logo__brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.logo__sub {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.header__price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow: 0 4px 14px rgba(196, 30, 58, 0.35);
}

.btn--primary:hover {
  box-shadow: 0 6px 20px rgba(196, 30, 58, 0.45);
}

.btn--outline {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn--lg {
  padding: 16px 32px;
  font-size: 1.05rem;
}

.btn--block {
  width: 100%;
}

/* Hero */
.hero {
  padding: 48px 0 64px;
  background: linear-gradient(160deg, #fff 0%, var(--color-accent-light) 50%, #fff 100%);
  overflow: hidden;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero__badge {
  display: inline-block;
  padding: 6px 14px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--color-text);
}

.hero__lead {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 28px;
}

.hero__meta-item {
  display: flex;
  flex-direction: column;
}

.hero__meta-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.hero__meta-value {
  font-weight: 600;
  font-size: 1rem;
}

.hero__price-block {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 24px;
}

.hero__price {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
}

.hero__price-note {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero__image-wrap {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero__image-wrap img {
  max-height: 420px;
  width: auto;
  filter: drop-shadow(var(--shadow-lg));
}

.hero__disclaimer {
  margin-top: 20px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-primary);
}

/* Sections */
.section {
  padding: 64px 0;
}

.section--alt {
  background: var(--color-surface);
}

.section__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  text-align: center;
  margin-bottom: 12px;
}

.section__subtitle {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 40px;
}

/* Benefits */
.benefits {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.benefit-card {
  padding: 28px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s, transform 0.2s;
}

.benefit-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.benefit-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: 12px;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.benefit-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.benefit-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* Composition */
.composition__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.composition__image {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.composition-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.composition-table th,
.composition-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.composition-table th {
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
}

.composition-table tr:last-child td {
  border-bottom: none;
}

.composition-table tr:nth-child(even) td {
  background: #f8fafc;
}

.composition__note {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Usage */
.usage-box {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px;
  background: linear-gradient(135deg, var(--color-accent-light), #fff);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.usage-box h3 {
  margin-bottom: 16px;
  color: var(--color-accent);
}

.usage-box ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.usage-box li {
  padding-left: 28px;
  position: relative;
}

.usage-box li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

.usage-box .warning {
  margin-top: 20px;
  padding: 14px;
  background: #fff8e6;
  border-radius: var(--radius);
  font-size: 0.85rem;
  border-left: 3px solid #f59e0b;
}

/* Certificates */
.certificates {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.certificate-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}

.certificate-card:hover {
  box-shadow: var(--shadow-md);
}

.certificate-card img {
  width: 100%;
  cursor: pointer;
}

.certificate-card__caption {
  padding: 14px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
}

/* Delivery */
.delivery-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 28px;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-lg);
  text-align: center;
}

.delivery-banner__icon {
  font-size: 2.5rem;
}

.delivery-banner h3 {
  font-size: 1.25rem;
}

.delivery-banner p {
  opacity: 0.9;
  font-size: 0.95rem;
}

/* Order form */
.order {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-accent-light) 100%);
}

.order__grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 40px;
  align-items: start;
}

.order__info {
  padding: 32px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.order__info h3 {
  margin-bottom: 20px;
  font-size: 1.25rem;
}

.order__product {
  display: flex;
  gap: 16px;
  align-items: center;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 20px;
}

.order__product img {
  width: 80px;
  border-radius: var(--radius);
}

.order__total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.25rem;
  font-weight: 700;
  padding-top: 16px;
}

.order__total span:last-child {
  color: var(--color-primary);
  font-size: 1.5rem;
}

.form-card {
  padding: 32px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.form-card h3 {
  margin-bottom: 24px;
  font-size: 1.25rem;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}

.form-group label .required {
  color: var(--color-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(26, 107, 92, 0.15);
}

.form-group input.error,
.form-group textarea.error {
  border-color: var(--color-primary);
}

.form-group .error-msg {
  font-size: 0.8rem;
  color: var(--color-primary);
  margin-top: 4px;
  display: none;
}

.form-group .error-msg.visible {
  display: block;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 20px;
}

.checkbox-group input {
  margin-top: 4px;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.checkbox-group label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

/* Footer */
.footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 48px 0 24px;
  font-size: 0.85rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.footer h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 12px;
}

.footer__legal p {
  margin-bottom: 6px;
  line-height: 1.5;
}

.footer__bottom {
  padding-top: 24px;
  border-top: 1px solid #334155;
  text-align: center;
  font-size: 0.8rem;
}

.footer .bad-notice {
  margin-top: 16px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  font-size: 0.8rem;
}

/* Thank you page */
.thank-you-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.thank-you {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 20px;
  background: linear-gradient(160deg, var(--color-accent-light) 0%, #fff 100%);
}

.thank-you__card {
  max-width: 520px;
  width: 100%;
  padding: 48px 40px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.thank-you__icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.thank-you__card h1 {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.thank-you__card p {
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.thank-you__order {
  margin: 24px 0;
  padding: 20px;
  background: var(--color-bg);
  border-radius: var(--radius);
  text-align: left;
  font-size: 0.9rem;
}

.thank-you__order dt {
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  margin-top: 10px;
}

.thank-you__order dt:first-child {
  margin-top: 0;
}

.thank-you__order dd {
  margin: 2px 0 0;
  color: var(--color-text);
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.9);
  align-items: center;
  justify-content: center;
  padding: 20px;
  cursor: pointer;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-height: 90vh;
  max-width: 90vw;
  object-fit: contain;
  border-radius: var(--radius);
}

.lightbox__close {
  position: absolute;
  top: 20px;
  right: 24px;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  background: none;
  border: none;
  line-height: 1;
}

/* Responsive */
@media (max-width: 900px) {
  .hero__grid,
  .composition__grid,
  .order__grid,
  .footer__grid {
    grid-template-columns: 1fr;
  }

  .hero__image-wrap {
    order: -1;
  }

  .hero__image-wrap img {
    max-height: 280px;
    margin: 0 auto;
  }

  .header__price {
    display: none;
  }

  .form-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .hero {
    padding: 32px 0 48px;
  }

  .section {
    padding: 48px 0;
  }

  .btn--lg {
    width: 100%;
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
  }
}