:root {
  color-scheme: light;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --page-bg: #f4f6fb;
  --surface: #ffffff;
  --surface-alt: #eef2f8;
  --text: #0f172a;
  --muted: #667085;
  --primary: #0f62fe;
  --primary-strong: #0043ce;
  --border: rgba(15, 23, 42, 0.08);
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, rgba(15, 98, 254, 0.12), transparent 35%),
    linear-gradient(180deg, #eef2f8 0%, #f8fafc 100%);
  color: var(--text);
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  border: none;
  cursor: pointer;
  font: inherit;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

.navbar {
  max-width: 1180px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text);
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-btn {
  background: rgba(15, 98, 254, 0.08);
  color: var(--text);
  padding: 0.85rem 1rem;
  border-radius: 999px;
  transition: background 0.2s ease;
}

.icon-btn:hover {
  background: rgba(15, 98, 254, 0.18);
}

.menu-btn {
  display: none;
}

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px 24px 56px;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  gap: 40px;
  padding: 64px 0;
}

.hero-copy {
  max-width: 600px;
}

.eyebrow {
  display: inline-flex;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary-strong);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.hero-copy h1 {
  margin: 0 0 18px;
  font-size: clamp(2.5rem, 4vw, 4.5rem);
  line-height: 1.02;
}

.hero-copy p {
  max-width: 540px;
  color: var(--muted);
  line-height: 1.85;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-actions button,
.secondary-btn {
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 700;
}

.hero-actions button {
  background: var(--primary);
  color: white;
}

.secondary-btn {
  border: 1px solid rgba(15, 98, 254, 0.2);
  color: var(--text);
  background: transparent;
}

.hero-visual {
  overflow: hidden;
  border-radius: 32px;
  box-shadow: var(--shadow);
}

.hero-visual img {
  height: 100%;
  width: 100%;
  object-fit: cover;
}

.feature-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin: 24px 0 48px;
}

.feature-strip div {
  background: var(--surface);
  padding: 24px;
  border-radius: 24px;
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 600;
}

.section-heading {
  text-align: center;
  margin-bottom: 28px;
}

.section-heading span {
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-heading h2 {
  margin: 12px 0 0;
  font-size: clamp(1.9rem, 3vw, 2.8rem);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 32px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

.card:hover {
  transform: translateY(-8px);
}

.card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.card-content {
  padding: 22px;
}

.brand {
  margin: 0 0 10px;
  color: var(--primary-strong);
  font-size: 0.95rem;
  font-weight: 700;
}

.card h3 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.price {
  margin: 0 0 20px;
  color: var(--muted);
  font-weight: 600;
}

.card button {
  width: 100%;
  padding: 14px 0;
  border-radius: 999px;
  background: var(--primary);
  color: white;
  transition: background 0.2s ease;
}

.card button:hover {
  background: var(--primary-strong);
}

.highlights {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 56px;
}

.highlights div {
  background: var(--surface-alt);
  padding: 28px;
  border-radius: 28px;
  border: 1px solid var(--border);
}

.highlights h3 {
  margin-top: 0;
}

.cart {
  position: fixed;
  right: -360px;
  top: 0;
  width: min(360px, 100%);
  height: 100vh;
  padding: 24px;
  background: #ffffff;
  box-shadow: -24px 0 60px rgba(15, 23, 42, 0.16);
  transition: right 0.3s ease;
  z-index: 20;
  display: flex;
  flex-direction: column;
}

.cart.show {
  right: 0;
}

.cart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.close-cart {
  background: transparent;
  font-size: 1.1rem;
  padding: 10px;
  border-radius: 50%;
}

#cart-items {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  flex: 1;
  overflow-y: auto;
}

#cart-items li {
  padding: 14px 0;
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  color: var(--text);
}

.cart-total {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 20px 0;
}

.cart-actions {
  display: grid;
  gap: 14px;
}

.cart-actions button {
  width: 100%;
  padding: 14px 0;
  border-radius: 999px;
  background: var(--primary);
  color: white;
}

.cart-actions button:first-child {
  background: rgba(15, 98, 254, 0.12);
  color: var(--text);
}

.center {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 32px 24px;
  background: radial-gradient(circle at top left, rgba(15, 98, 254, 0.1), transparent 28%),
    linear-gradient(180deg, #eef2f8 0%, #f8fafc 100%);
}

.form-wrapper {
  width: min(1040px, 100%);
}

.form-card {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 32px;
  box-shadow: var(--shadow);
  overflow: hidden;
  width: 100%;
}

.form-card .panel {
  padding: 40px;
}

.form-card .panel--accent {
  background: linear-gradient(180deg, rgba(15, 98, 254, 0.16), rgba(15, 98, 254, 0.04));
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
}

.form-card h2 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 2.3vw, 2.5rem);
}

.form-card p {
  color: var(--muted);
  line-height: 1.8;
}

.stats-list {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: grid;
  gap: 14px;
}

.stats-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.stats-list strong {
  color: var(--text);
  font-weight: 700;
}

.highlight-pill {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(15, 98, 254, 0.14);
  color: var(--primary-strong);
  font-weight: 700;
  width: fit-content;
}

.social-btn {
  width: 100%;
  border-radius: 999px;
  padding: 14px 18px;
  margin-top: 20px;
  background: white;
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-weight: 700;
}

.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 28px 0 18px;
  color: var(--muted);
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.input-group {
  display: grid;
  gap: 12px;
  margin-bottom: 18px;
}

.input-group label {
  font-weight: 600;
  color: var(--text);
}

.input-group input,
.input-group select {
  width: 100%;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(15, 23, 42, 0.12);
  background: #f8fafc;
}

.input-group input:focus,
.input-group select:focus {
  outline: 2px solid rgba(15, 98, 254, 0.18);
  border-color: rgba(15, 98, 254, 0.3);
}

.primary-button {
  width: 100%;
  border-radius: 999px;
  padding: 16px 18px;
  background: var(--primary);
  color: white;
  font-weight: 700;
  margin-top: 6px;
}

.secondary-note {
  margin-top: 16px;
  font-size: 0.95rem;
  color: var(--muted);
}

.form-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 22px;
  font-size: 0.95rem;
  color: var(--muted);
}

.form-footer a {
  color: var(--primary);
}

.checkout-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 32px;
}

.summary-card {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 28px;
}

.summary-card h3 {
  margin-top: 0;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: 18px 0;
  font-weight: 600;
}

.summary-total {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
  font-size: 1.15rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  color: var(--muted);
}

.payment-methods {
  display: grid;
  gap: 14px;
  margin-top: 14px;
}

.payment-option {
  border-radius: 18px;
  border: 1px solid rgba(15, 23, 42, 0.12);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: white;
}

.payment-option input {
  accent-color: var(--primary);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

@media (max-width: 920px) {
  .form-card,
  .checkout-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .center {
    padding: 18px;
  }

  .form-card {
    border-radius: 24px;
  }

  .nav-actions {
    gap: 6px;
  }
}

footer {
  text-align: center;
  padding: 24px 0;
  color: var(--muted);
}

.dark {
  --page-bg: #090b12;
  --surface: #111827;
  --surface-alt: #111827;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  background: #090b12;
}

.dark header {
  background: rgba(15, 23, 42, 0.92);
}

.dark .feature-strip div,
.dark .card,
.dark .highlights div,
.dark .cart {
  background: #111827;
}

.dark .hero-copy p,
.dark .price,
.dark footer,
.dark .feature-strip div,
.dark .highlights div,
.dark #cart-items li {
  color: var(--muted);
}

.dark .nav-links a,
.dark .logo,
.dark .eyebrow,
.dark .section-heading span,
.dark .card h3,
.dark .brand,
.dark .cart-header h2,
.dark .cart-total,
.dark .icon-btn {
  color: var(--text);
}

@media (max-width: 1024px) {
  .product-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .feature-strip,
  .highlights {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-visual {
    max-height: 420px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    flex-direction: column;
    padding: 18px 24px 24px;
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  }

  .nav-links.show {
    display: flex;
  }

  .nav-actions {
    gap: 8px;
  }

  .menu-btn {
    display: inline-flex;
  }

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

  .feature-strip,
  .highlights {
    grid-template-columns: 1fr;
  }
}