:root {
  --shell-blue: #2680b8;
  --shell-blue-dark: #1a6a9a;
  --shell-blue-soft: #2a8f52;
  --shell-blue-text: #2680b8;
  --shell-blue-hover: #e8f4fb;
  --shell-accent: #f9d448;
  --shell-bg: #f4f6fb;
  --shell-surface: #ffffff;
  --shell-border: #e4e8f0;
  --shell-text: #1e293b;
  --shell-muted: #64748b;
  --shell-font: "Montserrat", "Segoe UI", Tahoma, Arial, sans-serif;
  --kl-green: var(--shell-blue);
  --kl-green-deep: var(--shell-blue-dark);
  --kl-green-soft: var(--shell-blue-hover);
  --kl-line: #d6dbe6;
  --kl-ink: var(--shell-text);
  --kl-muted: var(--shell-muted);
  --kl-font: var(--shell-font);
}

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

/* Quan trọng: các rule display:flex/grid không được đè thuộc tính hidden */
[hidden] { display: none !important; }

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--shell-font);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.45;
  color: var(--shell-text);
  background: var(--shell-bg);
}

.kl-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 56px;
  padding: 0.55rem 1.25rem;
  background: #fff;
  border-bottom: 1px solid var(--shell-border);
}

.kl-top__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: inherit;
}

.kl-top__brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
}

.kl-top__brand strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--shell-blue-dark);
  line-height: 1.2;
}

.kl-top__brand small {
  display: block;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--shell-muted);
}

.kl-main {
  width: min(1280px, 100%);
  margin: 0 auto;
  padding: 14px 14px 40px;
}

.kl-hint {
  font-size: 0.82rem;
  color: var(--shell-muted);
  font-weight: 500;
}

.kl-progress {
  margin: 0 0 12px;
  padding: 0.55rem 0.85rem;
  border-radius: 6px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1e3a5f;
  font-size: 0.84rem;
  font-weight: 500;
}

.kl-progress.is-done {
  background: var(--shell-blue-hover);
  border-color: rgba(38, 128, 184, 0.25);
  color: var(--shell-blue-dark);
}

.kl-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 2.5rem 1rem;
  color: var(--shell-muted);
  font-weight: 500;
}

.kl-loading[hidden] {
  display: none !important;
}

.kl-spinner {
  width: 36px;
  height: 36px;
  border: none;
  background: url("../anh/spin.png?v=1.0.5") center / contain no-repeat;
  animation: klSpin 0.9s linear infinite;
}

@keyframes klSpin { to { transform: rotate(360deg); } }

.kl-results-bar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
  flex-wrap: wrap;
}

.kl-results-bar h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--shell-text);
}

.kl-results-bar__sub {
  margin: 0.2rem 0 0;
  font-size: 0.8rem;
  color: var(--shell-muted);
}

.kl-results-bar__actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.kl-phase {
  display: inline-flex;
  gap: 0.35rem;
  padding: 0.2rem;
  border-radius: 999px;
  background: #eef2f7;
}

.kl-phase__item {
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--shell-muted);
}

.kl-phase__item.is-active {
  background: var(--shell-blue);
  color: #fff;
}

.kl-phase__item.is-done { color: var(--shell-blue-dark); }

.kl-btn,
.kl-btn--ghost,
.kl-btn--primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 4px;
  border: 1px solid transparent;
  font: inherit;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0.55rem 0.9rem;
}

.kl-btn--ghost {
  background: #fff;
  border-color: var(--fb-border, #aaa);
  color: var(--shell-text);
}

.kl-btn--ghost:hover { background: #f8fafc; }

.kl-btn--primary {
  background: var(--shell-blue);
  color: #fff;
}

.kl-btn--primary:hover { background: var(--shell-blue-dark); }

.kl-btn--accent {
  background: #e87722;
  border-color: #e87722;
  color: #fff;
  white-space: nowrap;
  min-height: 42px;
  padding: 0 14px;
}

.kl-btn--accent:hover { background: #d06618; border-color: #d06618; }

.kl-btn--wide { width: 100%; min-height: 44px; }

.kl-msg {
  margin: 0.6rem 0 0;
  padding: 0.55rem 0.75rem;
  border-radius: 6px;
  font-size: 0.84rem;
}

.kl-msg--error,
.kl-msg[data-type="error"],
.kl-msg.is-error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }

.kl-msg--info,
.kl-msg[data-type="info"],
.kl-msg.is-info { background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; }

.kl-msg--ok,
.kl-msg[data-type="ok"],
.kl-msg.is-ok { background: var(--shell-blue-hover); color: var(--shell-blue-dark); border: 1px solid #bbf7d0; }

.kl-suggest {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(100% + 4px);
  z-index: 50;
  background: #fff;
  border: 1px solid var(--fb-border, #aaa);
  border-radius: 6px;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.12);
  max-height: 220px;
  overflow: auto;
}

.kl-suggest[hidden] { display: none !important; }

.kl-suggest button {
  display: block;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  padding: 0.55rem 0.75rem;
  font: inherit;
  font-size: 0.84rem;
  cursor: pointer;
}

.kl-suggest button:hover,
.kl-suggest button.is-active { background: var(--shell-blue-hover); }

.kl-empty {
  padding: 2rem 1rem;
  text-align: center;
  color: var(--shell-muted);
  font-size: 0.9rem;
}

/* Passengers / success keep B2C layout */
.kl-page {
  background: #fff;
  border-radius: 4px;
  padding: 1.1rem 1.2rem 1.4rem;
  margin-top: 12px;
}

.kl-page__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.kl-page__head h2 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
}

.kl-page__head p {
  margin: 0.25rem 0 0;
  color: var(--shell-muted);
  font-size: 0.84rem;
}

.kl-summary {
  margin-bottom: 1rem;
  padding: 0.75rem 0.9rem;
  background: #f8fafc;
  border: 1px solid var(--shell-border);
  border-radius: 6px;
  font-size: 0.84rem;
}

.kl-travelers { display: grid; gap: 0.85rem; }

.kl-traveler {
  border: 1px solid var(--shell-border);
  border-radius: 6px;
  padding: 0.85rem;
}

.kl-traveler h3 {
  margin: 0 0 0.65rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--shell-blue-dark);
}

.kl-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.kl-field label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--shell-muted);
  margin-bottom: 0.3rem;
}

.kl-field input,
.kl-field select {
  width: 100%;
  height: 38px;
  border: 1px solid #aaa;
  border-radius: 3px;
  padding: 0 10px;
  font: inherit;
  font-size: 0.84rem;
}

.kl-contact {
  margin: 1rem 0;
  border: 1px solid var(--shell-border);
  border-radius: 6px;
  padding: 0.85rem;
}

.kl-contact legend {
  padding: 0 0.35rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--shell-blue-dark);
}

.kl-success {
  display: flex;
  justify-content: center;
}

.kl-success__card {
  text-align: center;
  max-width: 420px;
  margin: 1rem auto;
  padding: 1.5rem 1.25rem;
}

.kl-success__label {
  margin: 0;
  font-size: 0.8rem;
  color: var(--shell-muted);
  font-weight: 600;
}

.kl-success__pnr {
  margin: 0.4rem 0;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--shell-blue-dark);
}

.kl-success__meta,
.kl-success__hint {
  color: var(--shell-muted);
  font-size: 0.85rem;
}

.kl-foot {
  text-align: center;
  padding: 1rem;
  color: var(--shell-muted);
  font-size: 0.78rem;
}

.fb-sel-flights {
  margin-bottom: 0.85rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--shell-border);
}

.fb-sel-flights h3,
.kl-aside h3 {
  margin: 0 0 0.55rem;
  font-size: 0.9rem;
  font-weight: 700;
}

.kl-aside__leg {
  padding: 0.45rem 0;
  border-top: 1px dashed var(--shell-border);
  font-size: 0.8rem;
  line-height: 1.35;
  color: #334155;
}

.kl-aside__leg:first-of-type { border-top: none; }

.kl-aside__leg strong { display: block; font-size: 0.84rem; margin-bottom: 2px; color: #0f172a; }

.kl-aside__leg-route { font-weight: 700; color: #0f172a; }

.kl-aside__leg-meta,
.kl-aside__leg-fare { color: #64748b; font-size: 0.76rem; }

.kl-aside__total {
  margin-top: 0.55rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 800;
  color: #1a6a9a;
}

.kl-aside__actions { margin-top: 0.7rem; display: grid; gap: 0.4rem; }

@media (max-width: 960px) {
  .kl-form-grid { grid-template-columns: 1fr; }
  .kl-main { padding: 10px 8px 32px; }
}