:root {
  --bg: #fafaf7;
  --surface: #ffffff;
  --surface-2: #f5f3ee;
  --border: #e7e2d5;
  --text: #1f2933;
  --text-soft: #5b6471;
  --muted: #8b94a0;
  --accent: #0f4c5c;
  --accent-light: #d8ecef;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; }

.bk-container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.bk-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 30;
  box-shadow: var(--shadow-sm);
}
.bk-header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}
.bk-brand {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--accent);
}
.bk-header-meta { font-size: 13px; color: var(--text-soft); }
.bk-header-meta a { color: var(--accent); text-decoration: none; }

/* Hero */
.bk-hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  background-position: center 30%;
  background-size: cover;
  background-repeat: no-repeat;
  color: white;
  padding: 90px 0 60px;
}
.bk-hero-overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(15,27,44,0.18) 0%, rgba(15,27,44,0.55) 60%, rgba(15,27,44,0.78) 100%),
    linear-gradient(135deg, rgba(15,27,44,0.45), rgba(15,27,44,0.25));
}
.bk-hero-inner { position: relative; z-index: 2; }
.bk-hero h1 {
  font-size: 38px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.bk-hero p {
  font-size: 17px;
  max-width: 620px;
  margin: 0 0 28px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.bk-search-card {
  background: var(--surface);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  padding: 18px;
  display: grid;
  grid-template-columns: 1.2fr 1.2fr 0.8fr 0.8fr auto;
  gap: 12px;
  align-items: end;
  color: var(--text);
}
.bk-search-card label { display: block; font-size: 12px; color: var(--text-soft); }
.bk-search-card label span { display: block; font-weight: 500; margin-bottom: 4px; }
.bk-search-card input,
.bk-search-card select {
  width: 100%;
  padding: 10px 12px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
}
.bk-search-card input:focus,
.bk-search-card select:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  border-color: var(--accent);
}

.bk-cta {
  background: var(--accent);
  color: white;
  border: none;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.01em;
  transition: filter 0.15s;
  height: 44px;
}
.bk-cta:hover { filter: brightness(1.1); }
.bk-cta-large { padding: 14px 32px; font-size: 16px; height: auto; }

.bk-error {
  background: #fff1f1;
  color: #b3261e;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid #f6cccc;
  font-size: 14px;
  margin-top: 12px;
}

/* Steps */
.bk-step {
  padding: 60px 0;
  background: var(--bg);
}
.bk-step h2 {
  font-size: 26px;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
.bk-muted { color: var(--text-soft); margin: 0 0 28px; }

.bk-back {
  background: transparent;
  border: none;
  color: var(--accent);
  font-size: 14px;
  margin-bottom: 14px;
  padding: 0;
  font-weight: 500;
}

/* Room result cards */
.bk-room-card {
  display: grid;
  grid-template-columns: 320px 1fr auto;
  gap: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 18px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.bk-room-photo {
  height: 100%;
  min-height: 220px;
  background-size: cover;
  background-position: center;
  background-color: var(--surface-2);
}
.bk-room-body { padding: 22px 0; }
.bk-room-body h3 { margin: 0 0 6px; font-size: 19px; font-weight: 600; }
.bk-room-meta {
  display: flex; gap: 14px; flex-wrap: wrap;
  font-size: 13px; color: var(--text-soft);
  margin-bottom: 10px;
}
.bk-room-amenities {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: 10px;
}
.bk-amenity {
  font-size: 12px;
  padding: 3px 9px;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: 999px;
}
.bk-room-desc { color: var(--text-soft); font-size: 14px; margin-top: 8px; }
.bk-room-price-col {
  padding: 22px 22px 22px 0;
  text-align: right;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-end;
}
.bk-room-price-amount { font-size: 24px; font-weight: 700; color: var(--text); }
.bk-room-price-sub { font-size: 13px; color: var(--text-soft); margin-bottom: 12px; }
.bk-room-price-base { font-size: 12px; color: var(--muted); margin-bottom: 4px; }

/* Two-column extras step */
.bk-grid-2 {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 24px;
  align-items: start;
}
.bk-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.bk-panel h3 { font-size: 16px; margin: 0 0 12px; }

.bk-extra-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.bk-extra-row:last-child { border-bottom: none; }
.bk-extra-row input[type=checkbox] { width: 18px; height: 18px; }
.bk-extra-name { font-weight: 500; }
.bk-extra-desc { font-size: 13px; color: var(--text-soft); }
.bk-extra-price { margin-left: auto; font-weight: 500; }

/* Forms */
.bk-form-grid { display: grid; gap: 14px; }
.bk-form-grid label { display: block; font-size: 13px; color: var(--text-soft); }
.bk-form-grid label span { display: block; font-weight: 500; margin-bottom: 4px; color: var(--text); }
.bk-form-grid input, .bk-form-grid textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  background: var(--surface);
}
.bk-form-grid input:focus, .bk-form-grid textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  border-color: var(--accent);
}
.bk-form-grid textarea { resize: vertical; min-height: 70px; font-family: inherit; }
.bk-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.bk-checkbox { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.bk-checkbox input { width: auto; }

/* Summary */
.bk-summary {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
  position: sticky;
  top: 80px;
  box-shadow: var(--shadow-sm);
}
.bk-summary h3 { margin: 0 0 12px; font-size: 16px; }
.bk-summary-line {
  display: flex; justify-content: space-between;
  padding: 6px 0; font-size: 14px;
}
.bk-summary-line.total {
  border-top: 1px solid var(--border);
  margin-top: 8px; padding-top: 12px;
  font-weight: 700;
  font-size: 17px;
}
.bk-summary-meta { font-size: 13px; color: var(--text-soft); margin-bottom: 14px; }

.bk-confirm-bar {
  margin-top: 26px;
  display: flex;
  justify-content: flex-end;
}

/* Confirmation */
.bk-confirm-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 36px;
  box-shadow: var(--shadow);
  text-align: center;
}
.bk-confirm-card .check {
  width: 56px; height: 56px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: #def4e3; color: #1f7a3a;
  display: grid; place-items: center;
  font-size: 28px;
}
.bk-confirm-card h2 { margin: 0 0 8px; font-size: 24px; }
.bk-confirm-card .code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 22px;
  background: var(--surface-2);
  padding: 8px 14px;
  border-radius: 8px;
  display: inline-block;
  margin: 12px 0 18px;
  color: var(--accent);
}
.bk-confirm-card .actions {
  display: flex; gap: 10px; justify-content: center;
  margin-top: 18px;
}
.bk-confirm-detail {
  text-align: left;
  margin-top: 24px;
  border-top: 1px solid var(--border);
  padding-top: 20px;
}
.bk-qr-payment {
  display: grid;
  grid-template-columns: minmax(160px, 240px) 1fr;
  gap: 18px;
  align-items: start;
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-2);
}
.bk-qr-image {
  display: grid;
  place-items: center;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
}
.bk-qr-image img {
  display: block;
  width: 100%;
  max-width: 220px;
  height: auto;
}
.bk-qr-fields h4 {
  margin: 0 0 10px;
  font-size: 16px;
}
.bk-qr-fields div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 10px;
  padding: 5px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.bk-qr-fields div:last-child { border-bottom: 0; }
.bk-qr-fields span { color: var(--text-soft); }
.bk-qr-fields strong {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  overflow-wrap: anywhere;
}

/* Payment method radios */
.bk-payment-box {
  display: grid;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px 16px;
  margin: 4px 0;
}
.bk-payment-box legend {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0 8px;
  background: var(--surface);
  border-radius: 4px;
}
.bk-payment-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  background: var(--bg);
  transition: border-color 0.15s, background 0.15s;
}
.bk-payment-option:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 4%, var(--bg));
}
.bk-payment-option input[type=radio] {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--accent);
}
.bk-payment-option:has(input:checked) {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, var(--surface));
  box-shadow: 0 0 0 1px var(--accent);
}
.bk-payment-title {
  font-weight: 500;
  font-size: 14px;
  color: var(--text);
  margin-bottom: 2px;
}
.bk-payment-sub {
  font-size: 12px;
  color: var(--text-soft);
  line-height: 1.4;
}
.bk-payment-option.disabled {
  opacity: 0.55;
  cursor: not-allowed;
}
.bk-payment-option.disabled .bk-payment-sub {
  color: var(--warning);
}

/* Company invoice section */
.bk-toggle-company {
  background: color-mix(in srgb, var(--accent) 6%, var(--surface-2));
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.15s;
}
.bk-toggle-company:hover {
  background: color-mix(in srgb, var(--accent) 12%, var(--surface-2));
}
.bk-company-box {
  display: grid;
  gap: 12px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 4%, var(--surface)), var(--surface));
  border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border));
  border-radius: 12px;
  padding: 18px 18px 20px;
  margin: 4px 0 6px;
  position: relative;
}
.bk-company-box legend {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0 8px;
  background: var(--surface);
  border-radius: 4px;
}
.bk-ico-row {
  align-items: end;
}
.bk-ico-row label { margin: 0; }
.bk-ares-btn {
  height: 42px;
  padding: 0 14px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
  transition: filter 0.15s;
}
.bk-ares-btn:hover { filter: brightness(1.1); }
.bk-ares-btn:disabled { opacity: 0.6; cursor: progress; }
.bk-tiny { font-size: 12px; }
.bk-ares-status-success { color: var(--accent); font-weight: 500; }
.bk-ares-status-error { color: #b3261e; }

/* Footer */
.bk-footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  background: var(--surface);
  margin-top: 60px;
  font-size: 13px;
  color: var(--text-soft);
  text-align: center;
}
.bk-footer a { color: var(--accent); }

.bk-cookie {
  position: fixed;
  left: 20px;
  right: 20px;
  bottom: 20px;
  z-index: 80;
  display: flex;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  max-width: 920px;
  margin: 0 auto;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow-lg);
  text-align: left;
}
.bk-cookie strong { display: block; margin-bottom: 2px; }
.bk-cookie p { margin: 0; color: var(--text-soft); font-size: 13px; }
.bk-cookie-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.bk-cookie-actions a { color: var(--accent); font-weight: 600; text-decoration: none; }
.bk-cookie .bk-cta { height: 38px; padding: 8px 16px; }

/* Print: confirmation as PDF */
@media print {
  .bk-header, .bk-footer, .bk-confirm-card .actions { display: none; }
  body { background: white; }
  .bk-step { padding: 0; }
}

/* Mobile */
@media (max-width: 900px) {
  .bk-search-card { grid-template-columns: 1fr 1fr; }
  .bk-search-card .bk-cta { grid-column: 1 / -1; }
  .bk-room-card { grid-template-columns: 1fr; }
  .bk-room-photo { min-height: 180px; }
  .bk-room-body { padding: 18px 22px 0; }
  .bk-room-price-col { padding: 0 22px 22px; align-items: stretch; text-align: left; flex-direction: row; align-items: center; }
  .bk-room-price-col button { margin-left: auto; }
  .bk-grid-2 { grid-template-columns: 1fr; }
  .bk-summary { position: static; }
  .bk-qr-payment { grid-template-columns: 1fr; }
  .bk-hero h1 { font-size: 28px; }
  .bk-cookie {
    flex-direction: column;
    align-items: flex-start;
  }
  .bk-cookie-actions {
    width: 100%;
    justify-content: space-between;
  }
}
@media (max-width: 520px) {
  .bk-search-card { grid-template-columns: 1fr; }
  .bk-row-2 { grid-template-columns: 1fr; }
  .bk-qr-fields div { grid-template-columns: 1fr; gap: 2px; }
}