/* 1. RESET & BASIC SETUP  */
{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #ffffff;
    color: #333;
    line-height: 1.6;
    font-size: 16px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* 2. TYPOGRAPHY & COLORS */
h1, h2, h3, h4 {
    color: #0056b3; 
    font-weight: 700;
    margin-bottom: 15px;
}

/* Tiêu đề Section */
.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 40px;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    width: 60px;
    height: 4px;
    background-color: #e64a19;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

/* 3. BUTTON STYLES */
.btn-main {
    display: inline-block;
    background-color: #e64a19;
    color: white;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: bold;
    text-transform: uppercase;
    border: 2px solid #e64a19;
    cursor: pointer;
    margin-top: 15px;
}

.btn-main:hover {
    background-color: #bf360c;
    border-color: #bf360c;
}

.btn-secondary {
    display: inline-block;
    background-color: transparent;
    color: #0056b3;
    padding: 10px 25px;
    border-radius: 30px;
    border: 2px solid #0056b3;
    font-weight: 600;
    margin-top: 15px;
}

.btn-secondary:hover {
    background-color: #0056b3;
    color: white;
}
/* 4. HEADER CHUYÊN NGHIỆP*/
.top-bar {
    background-color: #0056b3; 
    color: #fff;
    padding: 10px 0;
    font-size: 0.9rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-info {
    display: flex;
    gap: 20px;
}

.top-info span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.top-info i {
    color: #E64A19; 
}

/* 4.2. MAIN HEADER  */
header {
    background: #fff;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05); 
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0; 
}

.navbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo h1 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 800;
    color: #0056b3;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.logo span {
    color: #E64A19; 
}

/* Menu */
nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
    margin: 0;
    padding: 0;
    align-items: center;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 600;
    font-size: 1rem;
    transition: color 0.3s ease;
    position: relative;
    padding: 5px 0;
}

/* Hiệu ứng gạch chân khi hover */
nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: #E64A19;
    transition: width 0.3s;
}

nav ul li a:hover::after,
nav ul li a.active::after {
    width: 100%;
}

nav ul li a:hover,
nav ul li a.active {
    color: #0056b3;
}

/* Nút Đặt Lịch (CTA Button) trên Header */
.btn-header-booking {
    background-color: #E64A19;
    color: #fff !important; 
    padding: 10px 25px;
    border-radius: 50px;
    font-weight: bold;
    text-transform: uppercase;
    font-size: 0.9rem;
    box-shadow: 0 4px 10px rgba(230, 74, 25, 0.3);
    transition: transform 0.3s, background-color 0.3s;
    animation: pulse-orange 2s infinite;
}

.btn-header-booking:hover {
    background-color: #bf360c;
    transform: translateY(-2px);
    color: #fff;
}
.btn-header-booking::after { display: none; } 

/* Animation */
@keyframes pulse-orange {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(230, 74, 25, 0.7); }
    70% { transform: scale(1.05); box-shadow: 0 0 0 15px rgba(230, 74, 25, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(230, 74, 25, 0); }
}

/* Responsive Header */
@media (max-width: 768px) {
    .top-bar { display: none; }
    .navbar-inner { flex-direction: column; gap: 15px; }
    nav ul { gap: 15px; font-size: 0.9rem; flex-wrap: wrap; justify-content: center; }
    .btn-header-booking { display: none; }
}

/* 5. FOOTER   */

.main-footer {
    background-color: #0056b3; 
    color: #ffffff;
    padding-top: 60px;
    margin-top: 50px;
    border-top: 4px solid #E64A19;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.footer-top {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    padding-bottom: 40px;
}

.footer-col h3 {
    color: #fff;
    margin-bottom: 20px;
    text-transform: uppercase;
    font-size: 1.1rem;
    border-bottom: 2px solid #E64A19;
    display: inline-block;
    padding-bottom: 5px;
}

.footer-logo { font-size: 2rem; font-weight: bold; color: #fff; margin-bottom: 15px; }
.footer-logo span { color: #E64A19; }

.footer-links { list-style: none; padding: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { 
    color: #e6f0ff;
    text-decoration: none; 
    transition: 0.3s; 
}
.footer-links a:hover { 
    color: #fff; 
    padding-left: 5px; 
    text-shadow: 0 0 5px rgba(255,255,255,0.5);
}
.footer-links i { margin-right: 8px; font-size: 0.8rem; color: #E64A19; }

.contact-info { list-style: none; padding: 0; }
.contact-info li { margin-bottom: 15px; display: flex; align-items: start; }
.contact-info i { 
    background: #fff; 
    color: #0056b3; 
    width: 25px; height: 25px; 
    text-align: center; line-height: 25px; 
    border-radius: 50%; 
    margin-right: 10px; 
    margin-top: 2px;
}

.social-links a {
    display: inline-block; width: 35px; height: 35px; line-height: 35px;
    background: rgba(255,255,255,0.2); 
    text-align: center; color: #fff;
    border-radius: 50%; margin-right: 5px; transition: 0.3s;
}
.social-links a:hover { background: #E64A19; }

.footer-bottom {
    background: #004494; 
    text-align: center; 
    padding: 15px 0; 
    border-top: 1px solid rgba(255,255,255,0.1); 
    font-size: 0.9rem;
    color: #e0e0e0;
}

@media (max-width: 768px) {
    .footer-top { grid-template-columns: 1fr; }
}