.hbk-card {
    /* Palette */
    --hbk-color-red: #d62839;
    --hbk-color-red-dark: #b01f2d;
    --hbk-color-red-light: #fbe4e6;
    --hbk-color-white: #ffffff;
    --hbk-color-offwhite: #fdfdfd;
    --hbk-color-text: #1c1c1e;
    --hbk-color-text-muted: #6b6b70;
    --hbk-color-border: #ececec;
    --hbk-color-border-strong: #e0e0e0;
    --hbk-color-gold: #c9a227;
    --hbk-color-success-bg: #fff5f5;
  
    /* Sizing */
    --hbk-radius-sm: 10px;
    --hbk-radius-md: 4px;
    --hbk-radius-lg: 4px;
    --hbk-shadow-sm: 0 3px 5px 0 rgba(0, 0, 0, 0.07);
    --hbk-shadow-md: 0 3px 5px 0 rgba(0, 0, 0, 0.07);
    --hbk-shadow-lg: 0 3px 5px 0 rgba(0, 0, 0, 0.07);
    --hbk-transition: 180ms cubic-bezier(0.4, 0, 0.2, 1);
  
    box-sizing: border-box;
    max-width: 520px;
    margin: 0 auto;
    background: var(--hbk-color-white);
    border-radius: var(--hbk-radius-lg);
    box-shadow: var(--hbk-shadow-lg);
    overflow: hidden;
    font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
    color: var(--hbk-color-text);
    border: 1px solid var(--hbk-color-border);
  }
  
  .hbk-card *,
  .hbk-card *::before,
  .hbk-card *::after {
    box-sizing: border-box;
  }
  
  /* ---------- Header ---------- */
  
  .hbk-card__header {
    position: relative;
    padding: 20px;
    background: linear-gradient(135deg, var(--hbk-color-red) 0%, var(--hbk-color-red-dark) 100%);
    color: var(--hbk-color-white);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
  }
  
  .hbk-card__eyebrow {
    margin: 0 0 4px;
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    opacity: 0.85;
    font-weight: 600;
  }
  
  .hbk-card__title {
    margin: 0;
    font-size: 22px;
    font-weight: 700;
    line-height: 100%;
    color: white;
  }
  
  .hbk-card__subtitle {
    margin: 0;
    font-size: 13px;
    line-height: 1.4;
    opacity: 0.92;
    max-width: 320px;
  }
  
  .hbk-card__rating {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 999px;
    padding: 6px 10px;
    font-size: 13px;
    font-weight: 700;
    backdrop-filter: blur(2px);
  }
  
  .hbk-card__star {
    width: 14px;
    height: 14px;
    fill: var(--hbk-color-gold);
  }
  
  /* ---------- Body / sections ---------- */
  
  .hbk-card__body {
    padding: 20px;
    background: var(--hbk-color-offwhite);
  }
  
  .hbk-section {
    border: none;
    margin: 0 0 24px;
    padding: 0;
  }
  
  .hbk-section__title {
    padding: 0;
    margin: 0 0 12px;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--hbk-color-text);
  }
  
  /* ---------- Room type cards ---------- */
  
  .hbk-room-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
  }
  
  @media (min-width: 560px) {
    .hbk-room-grid {
      grid-template-columns: 1fr 1fr;
    }
  }
  
  .hbk-room-option {
    position: relative;
    display: block;
    cursor: pointer;
  }
  
  .hbk-room-option__input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
  }
  
  .hbk-room-option__card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 6px;
    height: 100%;
    padding: 14px 14px 12px;
    background: var(--hbk-color-white);
    border: 1.5px solid var(--hbk-color-border-strong);
    border-radius: var(--hbk-radius-md);
    transition: border-color var(--hbk-transition), box-shadow var(--hbk-transition), transform var(--hbk-transition);
  }
  
  .hbk-room-option:hover .hbk-room-option__card {
    border-color: var(--hbk-color-red);
    box-shadow: var(--hbk-shadow-sm);
    transform: translateY(-2px);
  }
  
  .hbk-room-option__input:focus-visible + .hbk-room-option__card {
    outline: 2px solid var(--hbk-color-red);
    outline-offset: 2px;
  }
  
  .hbk-room-option__input:checked + .hbk-room-option__card {
    border-color: var(--hbk-color-red);
    background: var(--hbk-color-success-bg);
    box-shadow: var(--hbk-shadow-md);
  }
  
  .hbk-room-option__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  
  .hbk-room-option__icon {
    font-size: 22px;
    line-height: 1;
    display: none;
  }
  
  .hbk-room-option__check {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid var(--hbk-color-border-strong);
    flex-shrink: 0;
    transition: border-color var(--hbk-transition), background var(--hbk-transition);
    position: relative;
  }
  
  .hbk-room-option__input:checked + .hbk-room-option__card .hbk-room-option__check {
    border-color: var(--hbk-color-red);
    background: var(--hbk-color-red);
  }
  
  .hbk-room-option__input:checked + .hbk-room-option__card .hbk-room-option__check::after {
    content: "";
    position: absolute;
    left: 4px;
    top: 1px;
    width: 5px;
    height: 8px;
    border: solid var(--hbk-color-white);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
  }
  
  .hbk-room-option__name {
    font-size: 14px;
    font-weight: 700;
    color: var(--hbk-color-text);
  }
  
  .hbk-room-option__tagline {
    font-size: 12px;
    color: var(--hbk-color-text-muted);
    line-height: 1.35;
  }
  
  .hbk-room-option__meta {
    margin-top: 4px;
    display: flex;
    align-items: baseline;
    gap: 4px;
  }
  
  .hbk-room-option__price {
    font-size: 16px;
    font-weight: 800;
    color: var(--hbk-color-red);
  }
  
  .hbk-room-option__price-unit {
    font-size: 11px;
    color: var(--hbk-color-text-muted);
  }
  
  .hbk-room-option__capacity {
    margin-top: 2px;
    font-size: 11px;
    line-height: 14px;
    color: var(--hbk-color-text-muted);
  }
  
  /* ---------- Reservation type toggle ---------- */
  
  .hbk-toggle {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
  
  .hbk-toggle__option {
    position: relative;
    display: block;
    cursor: pointer;
  }
  
  .hbk-toggle__input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
  }
  
  .hbk-toggle__label {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 12px 14px;
    border-radius: var(--hbk-radius-sm);
    border: 1.5px solid var(--hbk-color-border-strong);
    background: var(--hbk-color-white);
    transition: border-color var(--hbk-transition), box-shadow var(--hbk-transition), transform var(--hbk-transition);
  }
  
  .hbk-toggle__option:hover .hbk-toggle__label {
    border-color: var(--hbk-color-red);
    transform: translateY(-1px);
  }
  
  .hbk-toggle__input:focus-visible + .hbk-toggle__label {
    outline: 2px solid var(--hbk-color-red);
    outline-offset: 2px;
  }
  
  .hbk-toggle__input:checked + .hbk-toggle__label {
    border-color: var(--hbk-color-red);
    background: var(--hbk-color-red);
    box-shadow: var(--hbk-shadow-sm);
  }
  
  .hbk-toggle__label-title {
    font-size: 13.5px;
    font-weight: 700;
    color: var(--hbk-color-text);
    transition: color var(--hbk-transition);
  }
  
  .hbk-toggle__label-sub {
    font-size: 11px;
    color: var(--hbk-color-text-muted);
    transition: color var(--hbk-transition);
  }
  
  .hbk-toggle__input:checked + .hbk-toggle__label .hbk-toggle__label-title,
  .hbk-toggle__input:checked + .hbk-toggle__label .hbk-toggle__label-sub {
    color: var(--hbk-color-white);
  }
  
  /* ---------- Guests & nights ---------- */
  
  .hbk-counter-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
  }
  
  @media (min-width: 560px) {
    .hbk-counter-grid {
      grid-template-columns: 1fr;
    }
  }
  
  .hbk-counter {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    background: var(--hbk-color-white);
    border: 1.5px solid var(--hbk-color-border-strong);
    border-radius: var(--hbk-radius-sm);
  }
  
  .hbk-counter__label {
    font-size: 13px;
    font-weight: 600;
    color: var(--hbk-color-text);
  }
  
  .hbk-stepper {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  
  .hbk-stepper__btn {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 1.5px solid var(--hbk-color-border-strong);
    background: var(--hbk-color-white);
    color: var(--hbk-color-red);
    font-size: 16px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background var(--hbk-transition), border-color var(--hbk-transition), transform var(--hbk-transition);
  }
  
  .hbk-stepper__btn:hover:not(:disabled) {
    background: var(--hbk-color-red);
    border-color: var(--hbk-color-red);
    color: var(--hbk-color-white);
    transform: scale(1.06);
  }
  
  .hbk-stepper__btn:active:not(:disabled) {
    transform: scale(0.94);
  }
  
  .hbk-stepper__btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
  }
  
  .hbk-stepper__value {
    min-width: 18px;
    text-align: center;
    font-size: 14px;
    font-weight: 700;
  }
  
  .hbk-capacity-note {
    margin: 10px 2px 0;
    min-height: 16px;
    font-size: 12px;
    color: var(--hbk-color-red-dark);
    transition: opacity var(--hbk-transition);
  }
  
  .hbk-capacity-note:empty {
    opacity: 0;
    display: none;
  }
  
  /* ---------- Footer / summary ---------- */
  
  .hbk-card__footer {
    padding: 18px 24px 24px;
    background: var(--hbk-color-offwhite);
    border-top: 1px solid var(--hbk-color-border);
  }
  
  .hbk-summary {
    background: var(--hbk-color-white);
    border: 1px solid var(--hbk-color-border);
    border-radius: var(--hbk-radius-md);
    padding: 14px 16px;
    margin-bottom: 14px;
  }
  
  .hbk-summary__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    padding: 4px 0;
  }
  
  .hbk-summary__label {
    color: var(--hbk-color-text-muted);
  }
  
  .hbk-summary__hint {
    font-size: 11px;
  }
  
  .hbk-summary__value {
    font-weight: 600;
    color: var(--hbk-color-text);
    white-space: nowrap;
  }
  
  .hbk-summary__divider {
    height: 1px;
    background: var(--hbk-color-border);
    margin: 8px 0;
  }
  
  .hbk-summary__row--total {
    padding-top: 2px;
  }
  
  .hbk-summary__row--total .hbk-summary__label {
    color: var(--hbk-color-text);
    font-weight: 700;
    font-size: 14px;
  }
  
  .hbk-summary__total {
    font-size: 24px;
    font-weight: 800;
    color: var(--hbk-color-red);
    display: inline-flex;
    align-items: baseline;
    gap: 2px;
    transition: transform var(--hbk-transition), color var(--hbk-transition);
  }
  
  .hbk-summary__currency {
    font-size: 15px;
    font-weight: 700;
  }
  
  .hbk-summary__total--pulse {
    animation: hbkPricePulse 420ms ease;
  }
  
  @keyframes hbkPricePulse {
    0% { transform: scale(1); color: var(--hbk-color-red); }
    35% { transform: scale(1.12); color: var(--hbk-color-red-dark); }
    100% { transform: scale(1); color: var(--hbk-color-red); }
  }
  
  .hbk-cta {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 18px;
    background: var(--hbk-color-red);
    color: var(--hbk-color-white);
    border: none;
    border-radius: var(--hbk-radius-sm);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.01em;
    cursor: pointer;
    box-shadow: var(--hbk-shadow-sm);
    transition: background var(--hbk-transition), transform var(--hbk-transition), box-shadow var(--hbk-transition);
  }
  
  .hbk-cta:hover {
    background: var(--hbk-color-red-dark);
    box-shadow: var(--hbk-shadow-md);
    transform: translateY(-1px);
  }
  
  .hbk-cta:active {
    transform: translateY(0);
  }
  
  .hbk-cta__icon {
    width: 16px;
    height: 16px;
    transition: transform var(--hbk-transition);
  }
  
  .hbk-cta:hover .hbk-cta__icon {
    transform: translateX(3px);
  }
  
  .hbk-cta:disabled {
    background: var(--hbk-color-text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
  }

  .hbk-card input[type="radio"]{
    visibility: hidden !important;
  }
  
  /* ---------- Responsive refinement ---------- */
  
  @media (min-width: 640px) {
    .hbk-card__header {
      padding: 20px;
    }
    .hbk-card__body {
      padding: 20px;
    }
    .hbk-card__footer {
      padding: 20px 32px 28px;
    }
  }
  
  @media (prefers-reduced-motion: reduce) {
    .hbk-card *,
    .hbk-card *::before,
    .hbk-card *::after {
      animation-duration: 0.001ms !important;
      transition-duration: 0.001ms !important;
    }
  }