/* United customer-facing styles
 * Inspired by united.com / ba.com / qantas.com — clean, generous
 * whitespace, full-bleed hero, elevated search card.
 */

:root {
    --ua-navy: #002244;
    --ua-navy-2: #102a43;
    --ua-blue: #0066CC;
    --ua-blue-light: #E8F0F9;
    --ua-amber: #FFCD32;
    --ua-amber-soft: #FFF4D1;
    --ua-cream: #FAFAF7;
    --ua-paper: #FFFFFF;
    --ua-ink: #15181F;
    --ua-ink-2: #4A5568;
    --ua-ink-3: #6F7787;
    --ua-line: #E5E8EE;
    --ua-line-soft: #F2F4F8;
    --ua-success: #1B8E4A;
    --ua-warning: #C66800;
    --ua-danger: #B91C1C;
    --ua-radius: 6px;
    --ua-radius-lg: 14px;
    --ua-shadow-card: 0 6px 24px rgba(0, 34, 68, 0.08);
    --ua-shadow-card-hover: 0 12px 32px rgba(0, 34, 68, 0.14);
}

* { box-sizing: border-box; }

html, body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
                 Roboto, Helvetica, Arial, sans-serif;
    color: var(--ua-ink);
    background: var(--ua-cream);
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: var(--ua-blue); text-decoration: none; }
a:hover { color: var(--ua-navy); text-decoration: underline; }

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--ua-navy);
    margin-top: 0;
}

/* ──────────────── Header / nav ──────────────── */
.ua-utility-bar {
    background: var(--ua-navy);
    color: rgba(255, 255, 255, 0.85);
    font-size: 13px;
    padding: 8px 0;
}
.ua-utility-bar a {
    color: rgba(255, 255, 255, 0.85);
    margin-left: 20px;
}
.ua-utility-bar a:hover { color: var(--ua-amber); text-decoration: none; }

.ua-main-nav {
    background: var(--ua-paper);
    border-bottom: 1px solid var(--ua-line);
    padding: 14px 0;
}
.ua-logo {
    font-family: "Inter", sans-serif;
    font-weight: 800;
    font-size: 24px;
    color: var(--ua-navy);
    letter-spacing: -0.02em;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.ua-logo:hover { color: var(--ua-navy); text-decoration: none; }
.ua-logo-mark {
    display: inline-block;
    width: 36px; height: 36px;
    background: var(--ua-navy);
    color: var(--ua-amber);
    border-radius: 50%;
    text-align: center;
    line-height: 36px;
    font-weight: 800;
    font-size: 16px;
}
.ua-nav-link {
    color: var(--ua-navy);
    font-weight: 500;
    margin-left: 28px;
    padding: 6px 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.2s;
}
.ua-nav-link:hover { border-bottom-color: var(--ua-amber); text-decoration: none; color: var(--ua-navy); }
.ua-nav-link.active { border-bottom-color: var(--ua-navy); }

/* ──────────────── Hero ──────────────── */
.ua-hero {
    position: relative;
    background:
        linear-gradient(135deg, rgba(0,34,68,0.85) 0%, rgba(0,34,68,0.55) 60%, rgba(0,34,68,0.30) 100%),
        radial-gradient(circle at 30% 70%, #1d4f7d 0%, #002244 80%);
    color: white;
    padding: 80px 0 200px;
    overflow: hidden;
}
.ua-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 80% 30%, rgba(255, 205, 50, 0.10) 0%, transparent 40%),
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 800 200'%3E%3Cpath d='M0,150 Q200,80 400,140 T800,120' stroke='rgba(255,255,255,0.08)' stroke-width='2' fill='none'/%3E%3Cpath d='M0,170 Q200,110 400,160 T800,150' stroke='rgba(255,255,255,0.06)' stroke-width='1' fill='none'/%3E%3C/svg%3E");
    background-size: cover;
    pointer-events: none;
}
.ua-hero-content { position: relative; z-index: 1; }
.ua-hero h1 {
    color: white;
    font-size: clamp(2.2rem, 4vw, 3.4rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 18px;
}
.ua-hero .lead {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.85);
    max-width: 560px;
}

/* ──────────────── Search card overlapping hero ──────────────── */
.ua-search-card {
    background: white;
    border-radius: var(--ua-radius-lg);
    box-shadow: var(--ua-shadow-card);
    padding: 28px;
    margin-top: -150px;
    margin-bottom: 48px;
    position: relative;
    z-index: 2;
}
.ua-search-card .trip-tabs {
    display: inline-flex;
    gap: 8px;
    margin-bottom: 20px;
}
.ua-search-card .trip-tab {
    padding: 6px 16px;
    border: 1px solid var(--ua-line);
    border-radius: 999px;
    background: white;
    color: var(--ua-ink-2);
    cursor: pointer;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.15s;
}
.ua-search-card .trip-tab.active {
    background: var(--ua-navy);
    color: white;
    border-color: var(--ua-navy);
}
.ua-search-card .trip-tab:hover:not(.active) { border-color: var(--ua-navy); color: var(--ua-navy); }

.ua-search-grid {
    display: grid;
    grid-template-columns: 1.3fr 1.3fr 1fr 1fr 0.8fr;
    gap: 12px;
    align-items: end;
}
@media (max-width: 980px) {
    .ua-search-grid { grid-template-columns: 1fr 1fr; }
}
.ua-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.ua-field label {
    font-size: 12px;
    font-weight: 600;
    color: var(--ua-ink-3);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.ua-field input, .ua-field select {
    background: var(--ua-line-soft);
    border: 1px solid transparent;
    border-radius: var(--ua-radius);
    padding: 12px 14px;
    font-size: 15px;
    color: var(--ua-ink);
    transition: border-color 0.15s, background 0.15s;
    appearance: none;
}
.ua-field input:focus, .ua-field select:focus {
    outline: none;
    border-color: var(--ua-navy);
    background: white;
}

/* Buttons */
.btn-ua, .ua-btn {
    background: var(--ua-navy);
    color: white;
    border: none;
    border-radius: var(--ua-radius);
    padding: 13px 22px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background 0.15s, transform 0.05s;
}
.btn-ua:hover, .ua-btn:hover { background: var(--ua-navy-2); color: white; text-decoration: none; }
.btn-ua:active, .ua-btn:active { transform: translateY(1px); }
.btn-ua-outline {
    background: white;
    color: var(--ua-navy);
    border: 1.5px solid var(--ua-navy);
}
.btn-ua-outline:hover { background: var(--ua-navy); color: white; }
.btn-ua-amber {
    background: var(--ua-amber);
    color: var(--ua-navy);
}
.btn-ua-amber:hover { background: #f5c020; color: var(--ua-navy); }
.btn-ua-ghost {
    background: transparent;
    color: var(--ua-navy);
    border: 1px solid var(--ua-line);
}
.btn-ua-ghost:hover { background: var(--ua-line-soft); color: var(--ua-navy); }

/* Section headings on landing */
.ua-section-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--ua-navy);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}
.ua-section-sub {
    color: var(--ua-ink-3);
    margin-bottom: 24px;
}

/* Route cards */
.ua-route-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 18px;
}
.ua-route-card {
    background: white;
    border-radius: var(--ua-radius-lg);
    padding: 22px;
    box-shadow: 0 1px 2px rgba(0,34,68,0.04);
    border: 1px solid var(--ua-line);
    cursor: pointer;
    transition: all 0.18s;
    text-align: left;
    width: 100%;
}
.ua-route-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--ua-shadow-card-hover);
    border-color: var(--ua-navy);
}
.ua-route-card .iata-pair {
    font-weight: 700;
    font-size: 18px;
    color: var(--ua-navy);
    letter-spacing: 0.04em;
}
.ua-route-card .iata-pair .arrow {
    color: var(--ua-amber);
    margin: 0 6px;
    font-weight: 400;
}
.ua-route-card .city-pair {
    color: var(--ua-ink-3);
    font-size: 13px;
    margin: 4px 0 12px;
}
.ua-route-card .from-price {
    color: var(--ua-ink-2);
    font-size: 13px;
}
.ua-route-card .from-price strong {
    color: var(--ua-navy);
    font-size: 18px;
    font-weight: 700;
}
.ua-route-card .freq-pill {
    display: inline-block;
    background: var(--ua-blue-light);
    color: var(--ua-navy);
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
}

/* Feature tiles */
.ua-feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 22px;
}
.ua-feature {
    background: white;
    border-radius: var(--ua-radius-lg);
    padding: 28px 24px;
    border: 1px solid var(--ua-line);
    transition: border-color 0.15s, transform 0.15s;
}
.ua-feature:hover { border-color: var(--ua-amber); transform: translateY(-1px); }
.ua-feature-icon {
    width: 44px; height: 44px;
    background: var(--ua-blue-light);
    color: var(--ua-navy);
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 14px;
}
.ua-feature h4 { font-size: 18px; margin-bottom: 6px; }
.ua-feature p {
    color: var(--ua-ink-3);
    font-size: 14px;
    line-height: 1.55;
    margin: 0 0 14px;
}
.ua-feature a.feature-link {
    color: var(--ua-navy);
    font-weight: 600;
    font-size: 14px;
}
.ua-feature a.feature-link::after { content: ' →'; transition: margin 0.15s; }
.ua-feature a.feature-link:hover::after { margin-left: 4px; }

/* Flight result cards (search results) */
.ua-flight-card {
    background: white;
    border-radius: var(--ua-radius-lg);
    border: 1px solid var(--ua-line);
    margin-bottom: 16px;
    overflow: hidden;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.ua-flight-card:hover { border-color: var(--ua-navy); box-shadow: var(--ua-shadow-card); }
.ua-flight-card .flight-body {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 24px;
    padding: 24px;
    align-items: center;
}
.ua-times {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 16px;
    align-items: center;
}
.ua-time {
    font-size: 24px;
    font-weight: 700;
    color: var(--ua-navy);
    line-height: 1;
}
.ua-time-loc {
    font-size: 13px;
    color: var(--ua-ink-3);
    margin-top: 4px;
}
.ua-time-line {
    position: relative;
    height: 2px;
    background: var(--ua-line);
    margin: 14px 0 6px;
}
.ua-time-line::before, .ua-time-line::after {
    content: '';
    position: absolute;
    top: -3px;
    width: 8px; height: 8px;
    background: var(--ua-navy);
    border-radius: 50%;
}
.ua-time-line::before { left: 0; }
.ua-time-line::after { right: 0; }
.ua-time-line .duration {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 12px;
    color: var(--ua-ink-3);
    background: white;
    padding: 0 8px;
    white-space: nowrap;
}
.ua-time-line .stop-marker {
    position: absolute;
    top: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 12px; height: 12px;
    background: var(--ua-amber);
    border: 2px solid white;
    border-radius: 50%;
    box-shadow: 0 0 0 1px var(--ua-amber);
}
.ua-fare-block {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
}
.ua-fare-price {
    font-size: 28px;
    font-weight: 700;
    color: var(--ua-navy);
    line-height: 1;
}
.ua-fare-label {
    font-size: 12px;
    color: var(--ua-ink-3);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.ua-chip {
    display: inline-block;
    background: var(--ua-blue-light);
    color: var(--ua-navy);
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}
.ua-chip.amber { background: var(--ua-amber-soft); color: #8B5A00; }
.ua-chip.warn  { background: #FFE7DB; color: var(--ua-warning); }
.ua-chip.success { background: #E0F5E6; color: var(--ua-success); }

/* Footer */
.ua-footer {
    background: var(--ua-navy);
    color: rgba(255,255,255,0.85);
    padding: 48px 0 32px;
    margin-top: 80px;
}
.ua-footer h6 {
    color: white;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}
.ua-footer a {
    color: rgba(255,255,255,0.7);
    display: block;
    padding: 4px 0;
    font-size: 14px;
}
.ua-footer a:hover { color: var(--ua-amber); text-decoration: none; }
.ua-footer .footer-base {
    border-top: 1px solid rgba(255,255,255,0.10);
    padding-top: 24px;
    margin-top: 32px;
    color: rgba(255,255,255,0.55);
    font-size: 13px;
}

/* Flash messages */
.ua-flash {
    border-radius: var(--ua-radius);
    padding: 14px 18px;
    margin-bottom: 18px;
    border: 1px solid;
    font-size: 14px;
}
.ua-flash.success { background: #E0F5E6; border-color: #A0D9B0; color: var(--ua-success); }
.ua-flash.error,
.ua-flash.danger  { background: #FFE0E0; border-color: #F0A0A0; color: var(--ua-danger); }
.ua-flash.info    { background: var(--ua-blue-light); border-color: #B0CFEC; color: var(--ua-navy); }
.ua-flash.warning { background: var(--ua-amber-soft); border-color: var(--ua-amber); color: var(--ua-warning); }

/* Cards on PNR view + check-in */
.ua-card {
    background: white;
    border-radius: var(--ua-radius-lg);
    border: 1px solid var(--ua-line);
    padding: 24px;
    margin-bottom: 18px;
}
.ua-card-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--ua-line-soft);
    margin-bottom: 16px;
}
.ua-card-head h3, .ua-card-head h4 { margin: 0; }

.pnr-pill {
    display: inline-block;
    font-family: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
    background: var(--ua-blue-light);
    color: var(--ua-navy);
    padding: 6px 14px;
    border-radius: 8px;
    letter-spacing: 4px;
    font-weight: 700;
    font-size: 18px;
}

/* Trust strip */
.ua-trust-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    justify-content: center;
    padding: 28px 0 0;
    color: var(--ua-ink-3);
    font-size: 13px;
}
.ua-trust-strip .ts-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.ua-trust-strip .ts-item i { color: var(--ua-navy); font-size: 16px; }