/* Tông màu Sáng - Xanh Dương (Bright Blue Theme) */
:root {
    --primary: #0056b3;       /* Xanh dương đậm chủ đạo */
    --primary-light: #e6f2ff; /* Xanh nhạt làm nền */
    --accent: #ff9800;        /* Cam nhạt tạo điểm nhấn nút bấm */
    --bg-white: #ffffff;
    --bg-gray: #f8f9fa;
    --text-dark: #333333;
    --text-muted: #666666;
    --border: #e0e0e0;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
body { background: var(--bg-white); color: var(--text-dark); line-height: 1.6; }
a { text-decoration: none; color: inherit; }

/* HEADER & NAVBAR */
.header { background: var(--bg-white); box-shadow: 0 2px 10px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 1000; }
.nav-container { max-width: 1200px; margin: 0 auto; padding: 15px 20px; display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 22px; font-weight: 700; color: var(--primary); display: flex; align-items: center; gap: 8px; }
.nav-links { display: flex; gap: 25px; list-style: none; }
.nav-links a { font-weight: 600; color: var(--text-dark); transition: color 0.3s; }
.nav-links a:hover { color: var(--primary); }
.nav-cta .btn { background: var(--primary); color: white; padding: 10px 20px; border-radius: 5px; font-weight: bold; }
.nav-cta .btn:hover { background: #004494; }

/* HERO SECTION (Màu nền xanh sáng) */
.hero { background: linear-gradient(135deg, var(--primary-light) 0%, #ffffff 100%); padding: 80px 20px; text-align: center; }
.hero h1 { font-size: 42px; color: var(--primary); margin-bottom: 20px; }
.hero p { font-size: 18px; color: var(--text-muted); max-width: 700px; margin: 0 auto 30px; }

/* FORM ĐẶT XE DÙNG CHUNG */
.booking-box { max-width: 800px; margin: -40px auto 40px; background: white; padding: 30px; border-radius: 10px; box-shadow: 0 10px 30px rgba(0,86,179,0.1); position: relative; z-index: 10; border-top: 4px solid var(--primary); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-bottom: 15px; }
.form-control { width: 100%; padding: 12px; border: 1px solid var(--border); border-radius: 5px; background: var(--bg-gray); }
.form-control:focus { outline: none; border-color: var(--primary); background: white; }
.btn-submit { width: 100%; padding: 14px; background: var(--accent); color: white; border: none; border-radius: 5px; font-size: 16px; font-weight: bold; cursor: pointer; transition: 0.3s; }
.btn-submit:hover { background: #e68a00; }
#formNotif { margin-top: 15px; text-align: center; font-weight: 600; font-size: 14px; }

/* LAYOUT TRANG CON */
.page-container { max-width: 1200px; margin: 50px auto; padding: 0 20px; }
.page-title { color: var(--primary); font-size: 32px; margin-bottom: 20px; text-align: center; border-bottom: 2px solid var(--primary-light); padding-bottom: 10px; }

/* FOOTER */
.footer { background: var(--primary); color: white; padding: 50px 20px 20px; margin-top: 50px; }
.footer-grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; }
.footer h3 { margin-bottom: 15px; color: var(--accent); }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a:hover { color: var(--accent); text-decoration: underline; }
.footer-bottom { text-align: center; margin-top: 30px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.2); font-size: 14px; }

/* RESPONSIVE */
@media (max-width: 768px) {
    .form-grid { grid-template-columns: 1fr; }
    .nav-links { display: none; /* Thêm JS toggle menu sau nếu cần */ }
}