:root {
  --rk-bg: #090b10;
  --rk-surface: #111827;
  --rk-surface-alt: #0b1220;
  --rk-accent: #f97316;
  --rk-accent-soft: rgba(249, 115, 22, 0.12);
  --rk-border: rgba(148, 163, 184, 0.3);
  --rk-text: #e5e7eb;
  --rk-text-soft: #9ca3af;
  --rk-radius-lg: 18px;
  --rk-radius-md: 12px;
  --rk-shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.7);
  --rk-transition: 180ms ease-out;
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family:
    "Inter",
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  background: radial-gradient(circle at top left, #111827 0, #020617 45%);
  color: var(--rk-text);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main.rk-main {
  flex: 1 0 auto;
}

.rk-container {
  width: min(1120px, 100% - 2.5rem);
  margin-inline: auto;
}

.rk-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: linear-gradient(
    to bottom,
    rgba(15, 23, 42, 0.9),
    rgba(15, 23, 42, 0.7),
    transparent
  );
  border-bottom: 1px solid rgba(148, 163, 184, 0.3);
}

.rk-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.9rem;
}

.rk-logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--rk-text);
}

.rk-logo img {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  object-fit: cover;
  box-shadow: 0 0 0 2px rgba(249, 115, 22, 0.7);
}

.rk-logo span {
  font-weight: 600;
  letter-spacing: 0.05em;
}

.rk-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.95rem;
}

.rk-nav a {
  text-decoration: none;
  color: var(--rk-text-soft);
  position: relative;
  padding-block: 0.2rem;
  transition: color var(--rk-transition);
}

.rk-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(to right, #f97316, #facc15);
  transition: width var(--rk-transition);
}

.rk-nav a:hover {
  color: #f9fafb;
}

.rk-nav a:hover::after {
  width: 100%;
}

.rk-nav-toggle {
  display: none;
  flex-direction: column;
  gap: 0.22rem;
  background: transparent;
  border: none;
  padding: 0.25rem;
  cursor: pointer;
}

.rk-nav-toggle span {
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: #e5e7eb;
  transition:
    transform var(--rk-transition),
    opacity var(--rk-transition);
}

.rk-btn {
  border-radius: 999px;
  padding: 0.45rem 1rem;
  border: 1px solid transparent;
  font-size: 0.9rem;
  cursor: pointer;
  background: transparent;
  color: var(--rk-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  text-decoration: none;
  transition:
    background var(--rk-transition),
    border-color var(--rk-transition),
    color var(--rk-transition),
    transform var(--rk-transition),
    box-shadow var(--rk-transition);
}

.rk-btn--primary {
  background: linear-gradient(135deg, #f97316, #facc15);
  color: #0f172a;
  box-shadow: 0 14px 30px rgba(249, 115, 22, 0.45);
}

.rk-btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(249, 115, 22, 0.5);
}

.rk-btn--ghost {
  border-color: rgba(148, 163, 184, 0.5);
  background: rgba(15, 23, 42, 0.6);
}

.rk-btn--ghost:hover {
  background: rgba(15, 23, 42, 0.9);
}

.rk-btn--outline {
  border-color: rgba(148, 163, 184, 0.6);
  background: rgba(15, 23, 42, 0.7);
}

.rk-btn--outline:hover {
  background: rgba(15, 23, 42, 1);
}

.rk-btn--wide {
  padding-block: 0.7rem;
  padding-inline: 1.4rem;
  font-size: 0.95rem;
}

.rk-hero {
  padding-block: 3.5rem 3rem;
}

.rk-hero__content {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: center;
}

.rk-hero__text h1 {
  font-size: clamp(2.2rem, 3vw, 2.7rem);
  margin: 0 0 1rem;
  letter-spacing: 0.02em;
}

.rk-hero__text p {
  margin: 0 0 1.5rem;
  color: var(--rk-text-soft);
}

.rk-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.rk-hero__note {
  font-size: 0.85rem;
  color: var(--rk-text-soft);
}

.rk-hero__image {
  position: relative;
}

.rk-hero__image::before {
  content: "";
  position: absolute;
  inset: 12%;
  border-radius: 999px;
  border: 1px solid rgba(249, 115, 22, 0.35);
  transform: rotate(-4deg);
}

.rk-hero__image img {
  width: 100%;
  border-radius: var(--rk-radius-lg);
  object-fit: cover;
  box-shadow: var(--rk-shadow-soft);
}

.rk-main {
  padding-block: 0 3.5rem;
}

.rk-section {
  padding-block: 2.5rem;
}

.rk-section + .rk-section {
  border-top: 1px solid rgba(148, 163, 184, 0.2);
}

.rk-section--alt {
  background: radial-gradient(circle at top right, #020617 0, #020617 60%);
}

.rk-section--dark {
  background: radial-gradient(circle at top, #0f172a 0, #020617 65%);
  border-block: 1px solid rgba(148, 163, 184, 0.25);
}

.rk-section__header {
  margin-bottom: 1.8rem;
}

.rk-section__header h2 {
  margin: 0 0 0.4rem;
  font-size: 1.4rem;
}

.rk-section__header p {
  margin: 0;
  color: var(--rk-text-soft);
  font-size: 0.95rem;
}

.rk-section__header--center {
  text-align: center;
  max-width: 520px;
  margin-inline: auto;
}

.rk-section__footer {
  margin-top: 1.4rem;
  display: flex;
  justify-content: flex-start;
}

.rk-grid {
  display: grid;
  gap: 1.3rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.rk-grid.rk-grid--compact {
  grid-template-columns: repeat(auto-fit, minmax(220px, 260px));
  justify-content: start;
}

.rk-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 0.9rem;
  border-radius: var(--rk-radius-md);
  background: radial-gradient(circle at top, #0b1220 0, #020617 80%);
  border: 1px solid rgba(148, 163, 184, 0.28);
  box-shadow: 0 18px 35px rgba(15, 23, 42, 0.55);
  overflow: hidden;
  transition:
    transform var(--rk-transition),
    border-color var(--rk-transition),
    box-shadow var(--rk-transition),
    background var(--rk-transition);
}

.rk-card::before {
  content: "";
  position: absolute;
  inset: -120px;
  background: conic-gradient(
    from 180deg,
    transparent 0deg,
    rgba(249, 115, 22, 0.3) 60deg,
    transparent 130deg
  );
  opacity: 0;
  transition: opacity 220ms ease-out;
  pointer-events: none;
}

.rk-card:hover {
  transform: translateY(-4px) scale(1.01);
  border-color: rgba(249, 115, 22, 0.8);
  box-shadow: 0 26px 60px rgba(15, 23, 42, 0.9);
  background: radial-gradient(circle at top, #020617 0, #020617 85%);
}

.rk-card:hover::before {
  opacity: 1;
}

.rk-card__badge {
  position: absolute;
  inset-inline: auto 0.8rem;
  top: 0.8rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  background: rgba(16, 21, 48, 0.5);
  color: #c5cce4;
  border: 1px solid rgba(22, 56, 249, 0.65);
}

.rk-card__image {
  width: 100%;
  aspect-ratio: 4 / 5;
  border-radius: calc(var(--rk-radius-md) - 6px);
  object-fit: cover;
  margin-bottom: 0.7rem;
}

.rk-card__image-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.rk-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.rk-card__body .rk-btn {
  margin-top: auto;
}

.rk-card__body h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.rk-card__price {
  margin: 0.15rem 0 0.7rem;
  font-weight: 600;
  color: #e5e7eb;
}

.rk-card__availability {
  font-size: 0.8rem;
  margin: 0;
}

.rk-card__availability--in {
  color: #bbf7d0;
}

.rk-card__availability--out {
  color: #fecaca;
}

.rk-link {
  color: #fbbf24;
  font-size: 0.9rem;
  text-decoration: none;
}

.rk-link:hover {
  text-decoration: underline;
}

.rk-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.35);
  background: #020617;
  padding-block: 2.2rem 1.2rem;
}

.rk-footer__promo {
  text-align: center;
  margin-bottom: 2.2rem;
}

.rk-footer__promo h2 {
  margin: 0 0 0.4rem;
}

.rk-footer__promo p {
  margin: 0;
  color: var(--rk-text-soft);
  font-size: 0.95rem;
}

.rk-footer__promo-btn {
  margin-top: 1rem;
}

.rk-footer__grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  font-size: 0.9rem;
}

.rk-footer__grid h3 {
  margin-top: 0;
  margin-bottom: 0.6rem;
  font-size: 1rem;
}

.rk-footer__grid p {
  margin: 0.1rem 0;
  color: var(--rk-text-soft);
}

.rk-footer__bottom {
  margin-top: 1.3rem;
  text-align: center;
  font-size: 0.8rem;
  color: #6b7280;
}

.rk-modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 40;
}

.rk-modal.is-open {
  display: flex;
}

.rk-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(10px);
}

.rk-modal__content {
  position: relative;
  z-index: 1;
  width: min(420px, 100% - 2.5rem);
  padding: 1.5rem 1.7rem 1.7rem;
  border-radius: var(--rk-radius-md);
  background: radial-gradient(circle at top, #020617 0, #020617 75%);
  border: 1px solid rgba(148, 163, 184, 0.4);
  box-shadow: var(--rk-shadow-soft);
}

.rk-modal__content h2 {
  margin-top: 0;
  margin-bottom: 0.7rem;
}

.rk-modal__content p {
  margin: 0.35rem 0;
}

.rk-modal__content ul {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
}

.rk-modal__close {
  position: absolute;
  inset-inline: auto 0.8rem;
  top: 0.6rem;
  border: none;
  background: transparent;
  color: var(--rk-text-soft);
  font-size: 1.3rem;
  cursor: pointer;
}

.rk-product {
  margin-top: 1.8rem;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.4fr);
  gap: 2.5rem;
  align-items: flex-start;
}

.rk-product__image-wrap {
  position: relative;
  border-radius: var(--rk-radius-lg);
  padding: 1rem;
  background: radial-gradient(circle at top, #0b1220 0, #020617 80%);
  border: 1px solid rgba(148, 163, 184, 0.3);
  box-shadow: var(--rk-shadow-soft);
}

.rk-product__image-wrap img {
  width: 100%;
  border-radius: calc(var(--rk-radius-lg) - 10px);
  object-fit: cover;
}

.rk-product__info h1 {
  margin-top: 0;
  margin-bottom: 0.4rem;
}

.rk-product__subtitle {
  margin: 0 0 0.9rem;
  color: var(--rk-text-soft);
}

.rk-product__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
  margin-bottom: 1rem;
}

.rk-product__availability {
  font-size: 0.85rem;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: rgba(22, 163, 74, 0.1);
  color: #bbf7d0;
  border: 1px solid rgba(22, 163, 74, 0.4);
}

.rk-product__price {
  font-weight: 600;
  font-size: 1.1rem;
}

.rk-product__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-bottom: 1.4rem;
}

.rk-tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.25rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.4);
  margin-bottom: 1rem;
}

.rk-tabs__btn {
  border: none;
  background: transparent;
  color: var(--rk-text-soft);
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.9rem;
  transition:
    background var(--rk-transition),
    color var(--rk-transition);
}

.rk-tabs__btn.is-active {
  background: var(--rk-accent-soft);
  color: #fed7aa;
}

.rk-tabs__panels {
  padding: 1rem 1.1rem;
  border-radius: var(--rk-radius-md);
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(148, 163, 184, 0.3);
}

.rk-tabs__panel {
  display: none;
  font-size: 0.95rem;
}

.rk-tabs__panel.is-active {
  display: block;
}

.rk-tabs__panel h3,
.rk-tabs__panel h4 {
  margin-top: 0;
}

.rk-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.rk-table td {
  padding: 0.4rem 0.3rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
}

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

.rk-product__pack {
  margin-top: 1.2rem;
  padding: 0.9rem 1rem;
  border-radius: var(--rk-radius-md);
  background: rgba(15, 23, 42, 0.9);
  border: 1px dashed rgba(148, 163, 184, 0.35);
  font-size: 0.95rem;
}

@media (max-width: 900px) {
  .rk-hero__content {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.8rem;
  }

  .rk-hero__image {
    order: -1;
  }
}

@media (max-width: 768px) {
  .rk-nav {
    position: fixed;
    inset-inline: 0 1rem;
    top: 4rem;
    flex-direction: column;
    gap: 0.8rem;
    padding: 0.8rem 1rem 1rem;
    border-radius: var(--rk-radius-md);
    background: radial-gradient(circle at top, #020617 0, #020617 80%);
    border: 1px solid rgba(148, 163, 184, 0.3);
    box-shadow: var(--rk-shadow-soft);
    transform-origin: top right;
    transform: scale(0.95) translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition:
      opacity var(--rk-transition),
      transform var(--rk-transition);
  }

  .rk-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: scale(1) translateY(0);
  }

  .rk-nav-toggle {
    display: flex;
  }
}

.rk-nav-toggle.is-open span:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}
.rk-nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}
.rk-nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

@media (max-width: 880px) {
  .rk-product {
    grid-template-columns: minmax(0, 1fr);
  }
}