/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', sans-serif;
    line-height: 1.6;
    background-color: hsl(210, 20%, 98%);
    color: hsl(210, 20%, 15%);
}

img {
    max-width: 100%;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
.header {
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
    position: sticky;
    top: 0;
    z-index: 999;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: bold;
    font-size: 1.4rem;
    color: hsl(200, 95%, 40%);
}

.logo img {
    height: 64px;
    width: auto;
}

.logo-text {
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 0.5px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav a {
    color: hsl(210, 20%, 15%);
    font-weight: 500;
    transition: 0.3s;
}

.nav a:hover {
    color: hsl(200, 95%, 40%);
}

.mobile-menu-btn {
    display: none;
    background: none;
    font-size: 1.5rem;
}

/* Hero */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg,
            rgba(0, 123, 255, 0.7) 0%,
            rgba(255, 193, 7, 0.7) 100%),
        url('/img/hero-bus.png') center center / cover no-repeat;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 20px;
}

.hero-title {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-title .highlight {
    color: #00bfff;
    /* xanh dương nổi bật */
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.btn {
    padding: 12px 25px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.btn.primary {
    background: linear-gradient(90deg, #007bff, #ffc107);
    color: white;
    border: none;
}

.btn.primary:hover {
    opacity: 0.9;
}

.btn.outline {
    border: 2px solid white;
    background: transparent;
    color: white;
}

.btn.outline:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.booking-form {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    padding: 20px;
    justify-content: center;
}

.booking-form .form-group {
    flex: 1 1 140px;
}

.booking-form input {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #ddd;
    font-size: 1rem;
}

.booking-form .btn.fullwidth {
    flex: 1 1 100%;
    background-color: #00bfff;
    color: white;
    border: none;
    margin-top: 10px;
}

.booking-form .btn.fullwidth:hover {
    background-color: #0099cc;
}

/* Section */
.section {
    padding: 4rem 0;
}

.bg-light {
    background-color: hsl(0, 0%, 100%);
}

.section-header {
    text-align: center;
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: hsl(200, 95%, 40%);
}

.section-header p {
    color: hsl(210, 20%, 40%);
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 30px hsl(200, 95%, 40%, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: scale(1.02);
    box-shadow: 0 20px 40px hsl(200, 95%, 40%, 0.2);
}

.card img {
    width: 100%;
    height: 160px;
    object-fit: cover;
}

.card-body {
    padding: 1rem;
}

.card-body h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.card-body p {
    font-size: 0.95rem;
    color: hsl(210, 20%, 40%);
}

.card-body .price {
    display: block;
    margin: 0.75rem 0;
    color: hsl(200, 95%, 40%);
    font-weight: 600;
}

.btn.small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    border-radius: 0.375rem;
}

.testimonial-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1rem;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 0 0 2px hsl(200, 95%, 40%);
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.contact-item {
    text-align: center;
    padding: 1rem;
}

.contact-item .icon {
    font-size: 2rem;
    color: hsl(200, 95%, 40%);
    margin-bottom: 0.5rem;
}

/* Footer */
.footer {
    background-color: hsl(210, 20%, 15%);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 0.75rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
    color: hsl(0, 0%, 80%);
}

.footer-section .socials a {
    display: inline-block;
    margin-right: 0.5rem;
    color: hsl(0, 0%, 80%);
}

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
    font-size: 0.9rem;
    color: hsl(0, 0%, 70%);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn.primary {
    background: linear-gradient(135deg, hsl(200, 95%, 40%), hsl(45, 93%, 67%));
    color: white;
}

.btn.outline {
    border: 2px solid white;
    background: transparent;
    color: white;
}

.btn.primary:hover,
.btn.outline:hover {
    transform: scale(1.05);
}

.pulse {
    animation: pulse 1.5s infinite;
}

/* Animations */
@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7);
    }

    50% {
        transform: scale(1.05);
        box-shadow: 0 0 10px 4px rgba(255, 255, 255, 0.4);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        display: none;
        flex-direction: column;
        background: white;
        position: absolute;
        top: 64px;
        right: 0;
        width: 200px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    }

    .nav.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }
}