:root {
    --primary-color: #0770e3;
    --primary-hover: #0056b3;
    --secondary-color: #02122c;
    --accent-color: #ff7b00;
    --bg-color: #f1f5f9;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
    --radius: 12px;
    --transition: all 0.3s ease;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Plus Jakarta Sans', sans-serif; }
body { background-color: var(--bg-color); color: var(--text-color); display: flex; flex-direction: column; min-height: 100vh; }
.main-wrapper { flex: 1; }

.navbar { background: var(--secondary-color); padding: 1rem 2rem; position: sticky; top: 0; z-index: 1000; }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.brand-logo { color: #fff; text-decoration: none; font-size: 1.5rem; font-weight: 700; display: flex; align-items: center; gap: 10px; }
.brand-logo span strong { color: var(--primary-color); }
.nav-links { display: flex; align-items: center; gap: 20px; }
.nav-link { color: #cbd5e1; text-decoration: none; font-weight: 500; }
.nav-link:hover { color: #fff; }

.btn { padding: 0.6rem 1.3rem; border-radius: 8px; font-weight: 600; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 8px; border: none; transition: var(--transition); }
.btn-primary { background-color: var(--primary-color); color: #fff; }
.btn-primary:hover { background-color: var(--primary-hover); }
.btn-accent { background-color: var(--accent-color); color: #fff; }
.btn-accent:hover { background-color: #e06c00; }
.btn-outline { background: transparent; border: 1px solid var(--border-color); color: var(--text-color); }

.hero { background: linear-gradient(135deg, #02122c 0%, #0770e3 100%); color: #fff; padding: 4rem 1rem; text-align: center; }
.search-card { max-width: 1100px; margin: -3rem auto 2rem; background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); padding: 2rem; }
.search-tabs { display: flex; gap: 10px; margin-bottom: 1.5rem; border-bottom: 2px solid var(--border-color); padding-bottom: 10px; }
.tab-btn { padding: 10px 20px; text-decoration: none; font-weight: 600; color: var(--text-muted); }
.tab-btn.active { color: var(--primary-color); border-bottom: 3px solid var(--primary-color); }

.search-form { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 15px; align-items: flex-end; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-control { padding: 0.75rem 1rem; border: 1px solid var(--border-color); border-radius: 8px; outline: none; }

.results-container { max-width: 1200px; margin: 2rem auto; display: grid; grid-template-columns: 280px 1fr; gap: 2rem; padding: 0 1rem; }
.filter-sidebar { background: var(--card-bg); padding: 1.5rem; border-radius: var(--radius); box-shadow: var(--shadow); height: fit-content; }
.filter-group { margin-bottom: 1.5rem; border-bottom: 1px solid var(--border-color); padding-bottom: 1rem; }

.results-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; background: var(--card-bg); padding: 1rem 1.5rem; border-radius: var(--radius); }
.results-list { display: flex; flex-direction: column; gap: 1.2rem; }
.card-item { background: var(--card-bg); border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow); display: flex; justify-content: space-between; align-items: center; }
.flight-info { display: flex; align-items: center; gap: 2rem; flex: 1; }
.flight-route { display: flex; align-items: center; gap: 1.5rem; text-align: center; }
.card-pricing { text-align: right; border-left: 1px solid var(--border-color); padding-left: 1.5rem; min-width: 160px; }
.price-tag { font-size: 1.6rem; font-weight: 800; color: var(--primary-color); }

.hotel-card { display: grid; grid-template-columns: 200px 1fr 180px; gap: 1.5rem; align-items: center; }
.hotel-img { width: 100%; height: 130px; object-fit: cover; border-radius: 8px; }

.auth-container { max-width: 450px; margin: 4rem auto; background: var(--card-bg); padding: 2.5rem; border-radius: var(--radius); box-shadow: var(--shadow); }
.dashboard-grid { max-width: 1200px; margin: 3rem auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.5rem; padding: 0 1rem; }
.dashboard-card { background: var(--card-bg); border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow); }

.alert { padding: 0.8rem 1.2rem; border-radius: 8px; margin-bottom: 1rem; font-size: 0.9rem; }
.alert-error { background-color: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert-success { background-color: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }

.footer { background: var(--secondary-color); color: #cbd5e1; padding: 3rem 1rem 1rem; margin-top: 4rem; text-align: center; }

@media (max-width: 900px) {
    .results-container { grid-template-columns: 1fr; }
    .hotel-card { grid-template-columns: 1fr; }
    .card-item { flex-direction: column; align-items: flex-start; }
    .card-pricing { border-left: none; border-top: 1px solid var(--border-color); padding-left: 0; padding-top: 1rem; width: 100%; text-align: left; }
}