/* กำหนดค่าเริ่มต้น */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Sarabun', sans-serif;
}

body {
    background-color: #ffffff;
    color: #0f172a;
    line-height: 1.6;
}

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

ul {
    list-style: none;
}

/* --- Navbar --- */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-box {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logonav {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    object-fit: cover;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: #0f172a;
}

.highlight {
    color: #2563eb;
}

.brand-sub {
    font-size: 0.75rem;
    color: #64748b;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: #475569;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #2563eb;
}

.btn-booking {
    background-color: #2563eb;
    color: #ffffff;
    padding: 8px 18px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.3s;
}

.btn-booking:hover {
    background-color: #1d4ed8;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.menu-toggle .bar {
    width: 25px;
    height: 3px;
    background-color: #0f172a;
    transition: 0.3s;
}

/* --- ปุ่มทั่วไป --- */
.btn-primary {
    background-color: #2563eb;
    color: #ffffff;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: background 0.3s;
}

.btn-primary:hover {
    background-color: #1d4ed8;
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.4);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    backdrop-filter: blur(5px);
    transition: all 0.3s;
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.25);
}

.class-badge {
    background-color: #e0f2fe;
    color: #0284c7;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 4px;
    display: inline-block;
    letter-spacing: 0.5px;
}

/* ปุ่มลอยติดต่อ (Floating Buttons) */
.floating-contact {
    position: fixed;
    right: 25px;
    bottom: 25px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.float-btn {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 26px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-decoration: none;
}

.float-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

.float-btn.line-btn {
    background-color: #06c755;
}

.float-btn.fb-btn {
    background-color: #1877f2;
}