/* === COLOR VARIABLES === */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background: var(--bg-gradient-yellow-primary);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px var(--shadow-medium);
    backdrop-filter: blur(10px);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
}

.logo {
    text-decoration: none;
    display: flex;
    align-items: center;
    padding: 10px 0px;
}

.logo img {
    height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 1rem;
    border-radius: 25px;
}

.nav-menu a:hover {
    background: var(--bg-white-alpha-15);
    transform: translateY(-2px);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--bg-yellow-light);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-menu a:hover::after {
    width: 80%;
}

.btn-primary {
    background: var(--bg-gradient-white-yellow);
    color: var(--text-primary);
    padding: 1rem 2.5rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    font-size: 1.1rem;
    display: inline-block;
    transition: all 0.4s ease;
    box-shadow: 0 8px 25px var(--shadow-black-medium);
    border: 2px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 12px 35px var(--shadow-black-dark);
    background: linear-gradient(45deg, var(--bg-yellow-light), var(--bg-primary));
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    padding: 1rem 2.5rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    font-size: 1.1rem;
    display: inline-block;
    transition: all 0.4s ease;
    border: 2px solid rgba(51, 51, 51, 0.8);
}

.btn-secondary:hover {
    transform: translateY(-3px) scale(1.05);
    background: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--bg-primary);
}

/* Features Section */
.features {
    padding: 5rem 0;
    background: linear-gradient(180deg, var(--primary-yellow-pale) 0%, var(--primary-yellow-lighter) 100%);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.8rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    position: relative;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(45deg, var(--primary-yellow-darker), var(--primary-yellow-light));
    border-radius: 2px;
}

.section-title p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px var(--shadow-light);
    transition: all 0.4s ease;
    border: 1px solid rgba(254, 212, 3, 0.1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--shadow-light), transparent);
    transition: left 0.6s ease;
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px var(--shadow-medium);
    border-color: var(--primary-yellow-light);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-yellow-darker), var(--primary-yellow-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: var(--white);
    position: relative;
    z-index: 2;
}

.feature-card h3 {
    font-size: 1.4rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    position: relative;
    z-index: 2;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    position: relative;
    z-index: 2;
}

.section-title h2 {
    text-align: center;
    color: var(--text-primary);
}

.section-title p {
    text-align: center;
    color: var(--text-secondary);
}
/* Services Section */
.services {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--primary-yellow-darker) 0%, var(--primary-yellow-dark) 100%);
    color: var(--text-primary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--bg-secondary);
    padding: 2.5rem;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: var(--bg-primary);
    transition: all 0.6s ease;
    transform: scale(0);
}

.service-card:hover::before {
    transform: scale(1);
}

.service-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 241, 118, 0.5);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 2;
}

.service-card p {
    opacity: 0.9;
    line-height: 1.8;
    position: relative;
    z-index: 2;
    color: var(--text-secondary);
}

.service-card h3 i {
    margin-right: 0.75rem;
    color: var(--text-primary);
    width: 28px; /* Ensure consistent alignment */
}

/* Process Section */
.process {
    padding: 5rem 0;
    background: linear-gradient(180deg, var(--primary-yellow-pale) 0%, var(--white) 100%);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    position: relative;
}

.process-step {
    text-align: center;
    position: relative;
    padding: 2rem;
    background: var(--bg-yellow-light);
    border-radius: 20px;
    box-shadow: 0 10px 30px var(--shadow-light);
    transition: all 0.4s ease;
    border: 2px solid transparent;
}

.process-step:hover {
    transform: translateY(-5px);
    border-color: var(--primary-yellow-light);
    box-shadow: 0 15px 40px var(--shadow-medium);
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-primary);
}

.process-step h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.process-step p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* FAQ Section */
.faq {
    padding: 5rem 0;
    background: linear-gradient(180deg, var(--white) 0%, var(--primary-yellow-pale) 100%);
}

.faq-container {
    max-width: 800px;
    margin: 3rem auto 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background: var(--white);
    border-radius: 15px;
    border: 1px solid rgba(254, 212, 3, 0.15);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--primary-yellow-light);
    box-shadow: 0 10px 30px var(--shadow-light);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    cursor: pointer;
    font-weight: 500;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.faq-icon {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-primary);
    transition: transform 0.3s ease;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease, padding 0.5s ease;
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.faq-item.active .faq-answer {
    max-height: 200px; /* Adjust as needed */
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

/* Contact Section */
.contact {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--primary-yellow-darker) 0%, var(--primary-yellow-dark) 50%, var(--primary-yellow-light) 100%);
    color: var(--text-primary);
    text-align: center;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

/* Footer Styles */
.footer {
    background: var(--text-secondary);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-column h4 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--primary-yellow-lighter);
    position: relative;
}

.footer-column h4::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(45deg, var(--primary-yellow-light), var(--primary-yellow-lighter));
    border-radius: 2px;
}

.footer-logo-img {
    max-width: 50px;
    margin-bottom: 1rem;
}

.footer-logo-img-container {
    display: flex;
    align-items: center;
    justify-content: left;
    margin-bottom: 1rem;
}

.footer-logo-name {
    font-size: 2rem;
    color: var(--white);
    font-weight: bold;
    margin-left: 10px;
}

.footer-logo p {
    line-height: 1.7;
    opacity: 0.9;
    margin-bottom: 1.5rem;
    color: var(--primary-yellow-pale);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.social-link img {
    width: 22px;
    height: 22px;
    object-fit: contain;
}

.social-link:hover {
    background: rgba(255, 241, 118, 0.3);
    transform: translateY(-3px);
    border-color: var(--primary-yellow-light);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: var(--primary-yellow-pale);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    padding-left: 15px;
}

.footer-links a::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-yellow-light);
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-yellow-light);
    transform: translateX(5px);
}

.footer-links a:hover::before {
    color: var(--primary-yellow-lighter);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-details .contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-icon {
    font-size: 1.2rem;
    min-width: 25px;
    color: var(--primary-yellow-light);
}

.contact-details .contact-item div {
    flex: 1;
}

.contact-details strong {
    color: var(--primary-yellow-lighter);
    display: block;
    margin-bottom: 0.3rem;
}

.contact-details a {
    color: var(--primary-yellow-pale);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-details a:hover {
    color: var(--primary-yellow-light);
}

.footer-bottom {
    margin-top: 2rem;
}

.footer-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 241, 118, 0.5), transparent);
    margin-bottom: 1.5rem;
}

.footer-bottom-content {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom-content p {
    color: var(--primary-yellow-lighter);
}

.footer-bottom-links {
    display: flex;
    gap: 2rem;
}

.footer-bottom-links a {
    color: var(--primary-yellow-pale);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-bottom-links a:hover {
    color: var(--primary-yellow-light);
}

/* Floating Animation */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.floating {
    animation: float 3s ease-in-out infinite;
}

/* Hamburger Menu Icon */
.hamburger {
    display: none; /* Hidden on desktop */
    border: none;
    background: transparent;
    cursor: pointer;
    padding: 10px;
    z-index: 1001; /* Above header content */
    position: relative;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    margin: 5px 0;
    transition: all 0.3s ease-in-out;
    border-radius: 2px;
}

/* Optional: Add an overlay */
.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.menu-overlay.is-active {
    opacity: 1;
    visibility: visible;
}

/* Prevent body scroll when menu is open */
body.menu-open {
    overflow: hidden;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .hamburger {
        display: block; /* Show on mobile */
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%; /* Start off-screen */
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: linear-gradient(160deg, var(--primary-yellow-darker), var(--primary-yellow-dark));
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right 0.4s ease-in-out;
        box-shadow: -5px 0 15px rgba(0,0,0,0.2);
        padding-top: 60px; /* Space for header */
        z-index: 999;
    }

    .nav-menu.is-active {
        right: 0; /* Slide in */
    }

    .nav-menu a {
        font-size: 1.2rem;
        color: var(var(--text-primary));
    }

    /* Hamburger animation to 'X' */
    .hamburger.is-active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .hamburger.is-active span:nth-child(2) {
        opacity: 0;
    }
    .hamburger.is-active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    nav {
        padding: 0.5rem 0;
    }

    .logo {
        padding: 5px;
    }

    .logo img {
        height: 40px;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .section-title h2 {
        font-size: 2.2rem;
    }

    .features-grid,
    .services-grid,
    .process-timeline {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: left;
    }

    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .footer-bottom-links {
        justify-content: center;
    }

    .social-links {
        justify-content: center;
    }
}

/* Scroll animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Contact Form Styles --- */
.contact-form-main {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem; /* Khoảng cách giữa các trường */
    margin: 2rem 0;
}

.form-group {
    flex: 1 1 100%; /* Mặc định chiếm toàn bộ chiều rộng */
}

/* Cho màn hình rộng hơn 768px, đặt 2 trường đầu tiên cạnh nhau */
@media (min-width: 768px) {
    .form-group:nth-of-type(1),
    .form-group:nth-of-type(2) {
        flex-basis: calc(50% - 0.5rem); /* Rộng 50% trừ đi một nửa khoảng cách */
    }
}

.contact-form-main input,
.contact-form-main select,
.contact-form-main textarea {
    width: 100%;
    padding: 14px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Roboto', sans-serif;
    background-color: var(--white);
    transition: border-color 0.3s, box-shadow 0.3s;
    box-sizing: border-box; /* Đảm bảo padding không làm thay đổi kích thước */
}

.contact-form-main select {
    /* Tùy chỉnh mũi tên cho select box để đồng bộ */
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23333' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
    padding-right: 2.5rem; /* Chừa không gian cho mũi tên */
}

.contact-form-main input::placeholder,
.contact-form-main textarea::placeholder {
    color: var(--text-light);
}

.contact-form-main input:focus,
.contact-form-main select:focus,
.contact-form-main textarea:focus {
    outline: none;
    border-color: var(--primary-yellow-darker); /* Màu viền khi focus */
    box-shadow: 0 0 0 3px var(--shadow-light);
}

.contact-form-main button.btn-primary {
    flex-basis: 100%; /* Nút Gửi chiếm toàn bộ chiều rộng */
    margin-top: 1rem; /* Thêm khoảng cách phía trên nút */
}

/* --- Thông báo trạng thái của Form --- */
.form-success, .form-error {
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 8px;
    border: 1px solid;
}
.form-success {
    background-color: #e8f5e9; 
    color: #1b5e20; 
    border-color: #a5d6a7;
}
.form-error {
    background-color: #ffebee; 
    color: #b71c1c; 
    border-color: #ef9a9a;
}

/* --- Tùy chỉnh màu cho nút Gọi Ngay --- */
.contact-alternative .btn-primary {
    background: linear-gradient(45deg, var(--secondary-orange), var(--secondary-orange-dark));
    color: var(--white);
}

.contact-alternative .btn-primary:hover {
    background: linear-gradient(45deg, var(--primary-yellow-dark), var(--primary-yellow-light)); /* Màu vàng khi hover */
}

/* --- Success Popup Modal --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    display: none; /* Hidden by default */
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.visible {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal-overlay.visible .modal-content {
    transform: scale(1);
}

.modal-close-btn {
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 2rem;
    color: var(--text-light);
    cursor: pointer;
    transition: color 0.3s ease;
}

.modal-close-btn:hover {
    color: var(--text-dark);
}

.modal-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}
.modal-icon .fa-circle-check {
    color: var(--success-green); /* Green color for success */
}

.modal-content h3 {
    font-size: 1.8rem;
    color: var(--primary-yellow-darker);
    margin-bottom: 0.5rem;
}

.modal-content p {
    color: var(--text-dark);
    font-size: 1rem;
}

/* --- Fixed Social Buttons --- */
.fixed-social-buttons {
    position: fixed;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.fixed-social-buttons .fixed-social-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
    text-decoration: none;
    background-color: var(--white);
}

.fixed-social-buttons .fixed-social-btn:hover {
    transform: scale(1.1) translateX(-5px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.fixed-social-buttons .fixed-social-btn img {
    width: 28px;
    height: 28px;
}

/* --- Scroll to Top Button --- */
.scroll-to-top-btn {
    position: fixed;
    bottom: 70px;
    right: 30px;
    z-index: 998;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-yellow-darker), var(--primary-yellow-dark));
    color: var(--white);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
}

.scroll-to-top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

/* --- Fixed Call Button (Mobile Only) --- */
.fixed-call-btn {
    display: none; /* Hidden by default on desktop */
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(45deg, var(--primary-yellow-dark), var(--primary-yellow-light)); /* Orange gradient for call button */
    color: var(--text-primary);
    text-align: center;
    padding: 15px 0;
    font-size: 1.1rem;
    font-weight: bold;
    text-decoration: none;
    z-index: 1001; /* Higher than other fixed elements except modals */
    box-shadow: 0 -4px 15px rgba(0,0,0,0.2);
    transition: background 0.3s ease, opacity 0.4s ease, visibility 0.4s ease, transform 0.4s ease;
    align-items: center;
    justify-content: center;
    letter-spacing: 0.5px;
}

.fixed-call-btn.visible {
    display: flex; /* Show on mobile */
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.fixed-call-btn:hover {
    background: linear-gradient(45deg, var(--primary-yellow-dark), var(--primary-yellow-light));
    opacity: 0.9; /* Slightly darker on hover */
    transform: scaleX(1.02); /* Slightly scale on hover */
}

.fixed-call-btn i {
    margin-right: 10px;
    animation: phone-shake 2s ease-in-out infinite;
}

@keyframes phone-shake {
    0%, 100% { transform: rotate(0); }
    10%, 30%, 50%, 70%, 90% { transform: rotate(-8deg); }
    20%, 40%, 60%, 80% { transform: rotate(8deg); }
}