/* ============================================================
   Aeronex Airlines — Booking Flow
   검색(히어로) → 항공편(카드형) → 로그인/비회원동의 → 결제
   style.css의 디자인 토큰(네이비+골드)을 그대로 상속해서 사용합니다.
   ============================================================ */

.bk-body { min-height: 100vh; }

/* ---------- 상단 미니 네브 ---------- */
.bk-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px clamp(20px, 5vw, 48px);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.bk-nav .nav-logo { font-size: 1.1rem; }
.bk-nav .mark { width: 28px; height: 28px; }
.bk-nav-back { display: inline-flex; align-items: center; gap: 6px; font-size: 0.86rem; color: var(--ink-dim); }
.bk-nav-back:hover { color: var(--gold); }

/* ---------- STEP 1: 히어로 검색 ---------- */
.bk-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 120px 20px 60px;
  overflow: hidden;
  text-align: center;
}
.bk-hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 1000px 600px at 20% 0%, rgba(11, 42, 107, 0.16), transparent 60%),
    radial-gradient(ellipse 900px 700px at 90% 20%, rgba(240, 216, 120, 0.12), transparent 55%),
    linear-gradient(160deg, #0a1f47 0%, #0f2d63 45%, #16408a 75%, #2a5bb5 100%);
}
.bk-hero-bg::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 15% 70%, rgba(255,255,255,0.06) 0, transparent 3%),
    radial-gradient(circle at 80% 30%, rgba(255,255,255,0.05) 0, transparent 4%);
}
.bk-hero-inner { position: relative; z-index: 1; width: 100%; max-width: 920px; }
.bk-hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: #f0d878;
  margin-bottom: 18px;
}
.bk-hero-title { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; color: #fff; line-height: 1.3; }
.bk-hero-sub { color: rgba(255,255,255,0.78); margin-top: 12px; font-size: 0.98rem; }

.bk-search-card {
  margin-top: 34px;
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px clamp(20px, 4vw, 40px) 34px;
  box-shadow: 0 30px 70px -30px rgba(0,0,0,0.5);
}
.bk-trip-toggle {
  display: inline-flex; gap: 4px; padding: 4px;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 999px; margin-bottom: 22px;
}
.bk-trip-toggle button {
  border: none; background: transparent;
  padding: 8px 18px; border-radius: 999px;
  font-size: 0.82rem; font-weight: 700; color: var(--ink-dim); cursor: pointer;
}
.bk-trip-toggle button.is-active { background: linear-gradient(135deg, var(--gold-soft), var(--gold)); color: #fff; }

.bk-route-row { display: grid; grid-template-columns: 1fr auto 1fr; align-items: end; gap: 10px; }
.bk-field { position: relative; }
.bk-field label { display: block; font-size: 0.74rem; color: var(--ink-faint); margin-bottom: 6px; font-weight: 600; }
.bk-field select, .bk-field input[type="text"], .bk-field input[type="date"] {
  width: 100%; padding: 13px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong); background: var(--surface);
  font-size: 0.95rem; color: var(--ink);
}
.bk-field select:focus, .bk-field input:focus { outline: none; border-color: var(--gold); }

.bk-autocomplete-field { position: relative; }
.bk-autocomplete-list {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); box-shadow: 0 20px 40px -18px rgba(15,23,42,0.3);
  max-height: 260px; overflow-y: auto; z-index: 40; display: none;
}
.bk-autocomplete-list.is-open { display: block; }
.bk-ac-item { padding: 11px 14px; font-size: 0.88rem; cursor: pointer; display: flex; justify-content: space-between; }
.bk-ac-item:hover, .bk-ac-item.is-active { background: var(--surface-2); }
.bk-ac-item .code { color: var(--ink-faint); font-family: var(--font-mono); font-size: 0.78rem; }
.bk-ac-empty { padding: 14px; font-size: 0.82rem; color: var(--ink-faint); text-align: center; }

.bk-swap-btn {
  width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid var(--border-strong); background: var(--surface); color: var(--gold);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: transform 0.3s var(--ease-out), border-color 0.2s; margin-bottom: 2px;
}
.bk-swap-btn:hover { border-color: var(--gold); transform: rotate(180deg); }

.bk-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; margin-top: 18px; }
.bk-passenger-stepper {
  display: flex; align-items: center; justify-content: space-between;
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm); padding: 8px 12px;
}
.bk-passenger-stepper .lbl { font-size: 0.88rem; color: var(--ink); }
.bk-stepper-ctrl { display: flex; align-items: center; gap: 12px; }
.bk-stepper-ctrl button {
  width: 26px; height: 26px; border-radius: 50%;
  border: 1px solid var(--border-strong); background: var(--surface); cursor: pointer;
  font-size: 0.95rem; line-height: 1; color: var(--ink);
}
.bk-stepper-ctrl button:hover { border-color: var(--gold); color: var(--gold); }
.bk-stepper-ctrl span { min-width: 14px; text-align: center; font-weight: 700; }

.bk-search-submit { width: 100%; margin-top: 24px; padding: 16px; font-size: 1rem; }

/* ---------- 스텝 인디케이터 ---------- */
.bk-steps {
  align-items: center; justify-content: center; gap: 0;
  max-width: 560px; margin: 100px auto 0; padding: 0 20px;
}
.bk-steps.is-shown { display: flex; }
.bk-step { display: flex; align-items: center; gap: 8px; color: var(--ink-faint); font-size: 0.86rem; font-weight: 600; }
.bk-step .dot {
  width: 26px; height: 26px; border-radius: 50%;
  border: 1.5px solid var(--border-strong); display: flex; align-items: center; justify-content: center;
  font-size: 0.76rem; flex-shrink: 0; transition: background 0.25s, border-color 0.25s, color 0.25s;
}
.bk-step.is-done .dot { background: var(--gold); border-color: var(--gold); color: #fff; }
.bk-step.is-current { color: var(--ink); }
.bk-step.is-current .dot { border-color: var(--gold); color: var(--gold); box-shadow: 0 0 0 3px rgba(11,42,107,0.12); }
.bk-step-line { width: 56px; height: 1.5px; background: var(--border-strong); margin: 0 6px; }
.bk-step-line.is-done { background: var(--gold); }

/* ---------- 상단 고정 검색 요약 바 ---------- */
.bk-summary-bar {
  display: none; align-items: center; gap: 18px; flex-wrap: wrap;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 22px; margin: 22px auto 0; max-width: var(--container);
  box-shadow: 0 10px 30px -18px rgba(15, 23, 42, 0.18);
}
.bk-summary-bar.is-visible { display: flex; }
.bk-summary-route { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.05rem; }
.bk-summary-route .swap-ico {
  width: 26px; height: 26px; border-radius: 50%; background: var(--surface-2);
  display: flex; align-items: center; justify-content: center; color: var(--gold);
}
.bk-summary-sep { width: 1px; height: 26px; background: var(--border-strong); }
.bk-summary-meta { display: flex; flex-direction: column; font-size: 0.78rem; color: var(--ink-faint); gap: 2px; }
.bk-summary-meta b { color: var(--ink); font-size: 0.86rem; }
.bk-summary-bar .btn { margin-left: auto; }

/* ---------- 공용 좁은 wrap / 섹션 헤드 ---------- */
.bk-narrow-wrap { max-width: 760px; margin: 40px auto 0; padding: 0 20px 60px; }
.bk-results-wrap { max-width: var(--container); margin: 30px auto 0; padding: 0 20px 80px; }
.bk-section-head { text-align: center; margin-bottom: 30px; }
.bk-section-head h2 { font-size: clamp(1.3rem, 2.6vw, 1.8rem); font-weight: 800; margin-top: 10px; }

/* ---------- STEP 2: 정렬바 ---------- */
.bk-sort-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; flex-wrap: wrap; gap: 10px; }
.bk-sort-row select { padding: 8px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border-strong); background: var(--surface); font-size: 0.84rem; }
.bk-chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--border-strong); font-size: 0.8rem; color: var(--ink-dim); cursor: pointer; background: var(--surface);
}
.bk-chip.is-active { border-color: var(--gold); color: var(--gold); background: rgba(11,42,107,0.06); }

/* ---------- STEP 2: 카드형 결과 리스트 ---------- */
.bk-flight-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px;
}
.bk-flight-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 22px 20px;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.bk-flight-card:hover { border-color: var(--gold); box-shadow: 0 18px 40px -22px rgba(15,23,42,0.28); transform: translateY(-3px); }
.bk-lowest-tag {
  position: absolute; top: -10px; left: 20px;
  background: linear-gradient(135deg, var(--gold-soft), var(--gold)); color: #fff;
  font-size: 0.66rem; font-weight: 800; padding: 4px 10px; border-radius: 999px;
}
.bk-card-route { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.bk-time-block { text-align: center; }
.bk-time { font-size: 1.3rem; font-weight: 800; }
.bk-code { font-size: 0.74rem; color: var(--ink-faint); font-family: var(--font-mono); }
.bk-card-duration { flex: 1; text-align: center; margin: 0 10px; }
.bk-card-duration .dur { font-size: 0.7rem; color: var(--ink-faint); margin-bottom: 4px; }
.bk-duration-line { height: 1px; background: var(--border-strong); position: relative; }
.bk-duration-line::after { content: "✈"; position: absolute; right: 0; top: 50%; transform: translateY(-50%); font-size: 0.68rem; color: var(--gold); }
.bk-card-meta { font-size: 0.74rem; color: var(--ink-faint); display: flex; gap: 8px; justify-content: center; margin-bottom: 16px; }
.bk-card-meta b { color: var(--ink-dim); }

.bk-fare-options { display: flex; gap: 10px; }
.bk-fare-btn {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: 3px;
  padding: 12px 8px; border-radius: var(--radius-sm); border: 1.5px solid var(--border-strong);
  background: var(--surface); cursor: pointer; transition: border-color 0.2s, background 0.2s, transform 0.2s;
}
.bk-fare-btn:hover { border-color: var(--gold); transform: translateY(-2px); }
.bk-fare-btn .type { font-size: 0.7rem; color: var(--ink-faint); font-weight: 700; }
.bk-fare-btn .price { font-size: 0.94rem; font-weight: 800; color: var(--ink); }
.bk-fare-btn .seats { font-size: 0.64rem; color: var(--ink-faint); }
.bk-fare-btn[disabled] { opacity: 0.4; cursor: not-allowed; }
.bk-fare-btn.flex { background: rgba(11,42,107,0.04); }

.bk-pass-badge {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px;
  padding: 14px 10px; border-radius: var(--radius-sm); border: 1.5px dashed var(--border-strong);
  color: var(--ink-faint); font-size: 0.76rem; text-align: center;
}
.bk-empty-state { grid-column: 1 / -1; text-align: center; padding: 60px 20px; color: var(--ink-faint); }

/* ---------- STEP 3a: 진행 방법 선택 ---------- */
.bk-choice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.bk-choice-card {
  text-align: left; background: var(--surface); border: 1.5px solid var(--border-strong);
  border-radius: var(--radius); padding: 26px 22px; cursor: pointer;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  color: var(--gold);
}
.bk-choice-card:hover { border-color: var(--gold); transform: translateY(-3px); box-shadow: 0 18px 40px -24px rgba(15,23,42,0.28); }
.bk-choice-card h3 { color: var(--ink); font-size: 1.02rem; margin: 12px 0 6px; }
.bk-choice-card p { color: var(--ink-dim); font-size: 0.84rem; line-height: 1.5; }

/* ---------- STEP 3b: 로그인 카드 ---------- */
.bk-login-card {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: 0 24px 60px -30px rgba(15,23,42,0.28);
}
.bk-login-left {
  padding: 40px 32px; background: linear-gradient(150deg, var(--gold-dim), var(--gold-soft));
  color: #fff; display: flex; flex-direction: column; justify-content: center;
}
.bk-login-left h2 { font-size: 1.5rem; font-weight: 800; line-height: 1.4; }
.bk-login-left p { margin-top: 14px; font-size: 0.88rem; color: rgba(255,255,255,0.82); line-height: 1.6; }
.bk-login-right { padding: 40px 32px; display: flex; flex-direction: column; }
.bk-login-right h4 { font-size: 1.02rem; font-weight: 800; margin-bottom: 18px; }
.bk-login-hint { font-size: 0.76rem; color: var(--ink-faint); margin-top: 10px; text-align: center; }
.bk-social-divider {
  display: flex; align-items: center; gap: 10px; margin: 22px 0 14px;
  font-size: 0.72rem; color: var(--ink-faint);
}
.bk-social-divider::before, .bk-social-divider::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.bk-social-row { display: flex; justify-content: center; gap: 12px; }
.bk-social-ico {
  width: 40px; height: 40px; border-radius: 50%; border: none; color: #fff; font-weight: 800;
  display: flex; align-items: center; justify-content: center; font-size: 0.86rem; cursor: not-allowed; opacity: 0.55;
}

/* ---------- STEP 3c: 비회원 동의 ---------- */
.bk-consent-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.bk-consent-row { display: flex; align-items: center; gap: 12px; font-size: 0.92rem; font-weight: 600; cursor: pointer; }
.bk-consent-row input { width: 18px; height: 18px; accent-color: var(--gold); }
.bk-consent-view {
  margin-left: auto; background: none; border: 1px solid var(--border-strong); border-radius: 999px;
  padding: 5px 14px; font-size: 0.76rem; cursor: pointer; color: var(--ink-dim);
}
.bk-consent-note { margin-top: 16px; font-size: 0.82rem; color: var(--ink-faint); line-height: 1.7; }

/* ---------- STEP 4: 여정요약 + 승객정보 + 결제 사이드바 ---------- */
.bk-step3-grid { display: grid; grid-template-columns: 1fr 360px; gap: 26px; align-items: start; }
.bk-itin-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px; margin-bottom: 18px; }
.bk-itin-card h4 { font-size: 0.82rem; color: var(--ink-faint); margin-bottom: 10px; }
.bk-itin-row { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.bk-itin-route { font-weight: 800; font-size: 1.05rem; }
.bk-itin-sub { font-size: 0.8rem; color: var(--ink-dim); margin-top: 4px; }
.bk-itin-tag { font-size: 0.7rem; font-family: var(--font-mono); color: var(--gold); border: 1px solid var(--border-strong); padding: 3px 9px; border-radius: 999px; }

.bk-passenger-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.bk-passenger-card h4 { font-size: 0.82rem; color: var(--ink-faint); margin-bottom: 14px; }
.bk-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.bk-form-grid .full { grid-column: 1 / -1; }
.bk-form-grid label { display: block; font-size: 0.76rem; color: var(--ink-faint); margin-bottom: 5px; }
.bk-form-grid input, .bk-form-grid select {
  width: 100%; padding: 11px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong); background: var(--surface); font-size: 0.9rem;
}

.bk-sidebar {
  position: sticky; top: 100px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px; box-shadow: 0 20px 50px -30px rgba(15,23,42,0.3);
}
.bk-sidebar h4 { font-size: 0.86rem; margin-bottom: 14px; }
.bk-sidebar-row { display: flex; justify-content: space-between; font-size: 0.86rem; color: var(--ink-dim); padding: 6px 0; }
.bk-sidebar-row.total { border-top: 1px solid var(--border); margin-top: 10px; padding-top: 14px; font-size: 1rem; font-weight: 800; color: var(--ink); }
.bk-sidebar .btn { width: 100%; margin-top: 18px; }

.bk-step-actions { display: flex; justify-content: space-between; margin-top: 22px; max-width: var(--container); margin-left:auto; margin-right:auto; padding: 0 20px 60px; }
.bk-narrow-wrap .bk-step-actions { max-width: 760px; padding: 22px 0 0; }

/* ---------- 완료 화면 ---------- */
.bk-done { max-width: 520px; margin: 130px auto 60px; text-align: center; padding: 0 20px; }
.bk-done .ico {
  width: 64px; height: 64px; border-radius: 50%;
  background: linear-gradient(135deg, var(--gold-soft), var(--gold));
  color: #fff; display: flex; align-items: center; justify-content: center; margin: 0 auto 18px;
}

@media (max-width: 860px) {
  .bk-route-row { grid-template-columns: 1fr; }
  .bk-swap-btn { transform: rotate(90deg); margin: 4px auto; }
  .bk-swap-btn:hover { transform: rotate(270deg); }
  .bk-row-3 { grid-template-columns: 1fr; }
  .bk-step3-grid { grid-template-columns: 1fr; }
  .bk-sidebar { position: static; }
  .bk-summary-bar .btn { margin-left: 0; }
  .bk-choice-grid { grid-template-columns: 1fr; }
  .bk-login-card { grid-template-columns: 1fr; }
}