/* ===========================
   CSS Variables & Reset
   =========================== */
:root {
    --primary-color: #2563eb;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --text-color: #334155;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
}

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

/* ===========================
   Navigation
   =========================== */
.navbar {
    background: #fff;
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.logo i {
    font-size: 1.8rem;
}

.clinic-name {
    color: var(--dark-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary-color);
}

.btn-appointment {
    background: var(--primary-color);
    color: #fff !important;
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    transition: var(--transition);
}

.btn-appointment:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
}

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

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    transition: var(--transition);
}

/* ===========================
   Hero Section - Overlay Style
   =========================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
    margin-top: 70px;
    touch-action: pan-y; /* Allow vertical scroll but enable horizontal swipe detection */
}

.hero-carousel {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    transition: transform 0.6s ease-in-out;
    will-change: transform;
}

.carousel-slide {
    min-width: 100%;
    width: 100%;
    height: 100%;
    flex-shrink: 0;
    position: relative;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    user-select: none;
    -webkit-user-drag: none;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.7) 0%, rgba(30, 64, 175, 0.6) 100%);
    z-index: 1;
}

.hero-content-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    max-width: 900px;
    text-align: center;
    color: #fff;
    padding: 2rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease-out;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.4rem;
    margin-bottom: 2.5rem;
    animation: fadeInUp 1s ease-out;
    text-shadow: 1px 1px 6px rgba(0, 0, 0, 0.5);
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1.2s ease-out;
}

.btn {
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    font-size: 1.1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.btn-primary {
    background: #fff;
    color: var(--primary-color);
}

.btn-primary:hover {
    background: var(--light-color);
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

/* Carousel Controls */
.carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    background: rgba(255, 255, 255, 0.3);
    border: none;
    color: #fff;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(5px);
}

.carousel-control:hover {
    background: rgba(255, 255, 255, 0.5);
    transform: translateY(-50%) scale(1.1);
}

.carousel-control.prev {
    left: 20px;
}

.carousel-control.next {
    right: 20px;
}

.carousel-control i {
    font-size: 1.5rem;
}

/* Carousel Indicators */
.carousel-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    gap: 12px;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.8);
}

.indicator.active {
    background: #fff;
    border-color: var(--primary-color);
    transform: scale(1.2);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background: #fff;
    color: var(--primary-color);
}

/* ===========================
   Features Section
   =========================== */
.features {
    padding: 80px 0;
    background: var(--light-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

/* ===========================
   Services Section
   =========================== */
.services {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 3rem;
    opacity: 0.8;
}

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

.service-card {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.service-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

/* ===========================
   Doctors Section
   =========================== */
.doctors {
    padding: 80px 0;
    background: var(--light-color);
}

.doctors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.doctor-card {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.doctor-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.doctor-image {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.doctor-image i {
    font-size: 3rem;
    color: #fff;
}

.doctor-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.specialty {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.experience, .credentials {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.8;
}

/* ===========================
   About Section
   =========================== */
.about {
    padding: 80px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text h2 {
    text-align: left;
    margin-bottom: 1.5rem;
}

.about-text p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
}

.stat h3 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat p {
    color: var(--text-color);
}

.about-image {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    padding: 4rem;
}

.about-image i {
    font-size: 10rem;
    color: #fff;
    opacity: 0.9;
}

/* ===========================
   Appointment Section
   =========================== */
.appointment {
    padding: 80px 0;
    background: var(--light-color);
}

.whatsapp-booking {
    max-width: 800px;
    margin: 0 auto;
}

.whatsapp-content {
    background: #fff;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.whatsapp-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #25D366, #128C7E);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    animation: pulse 2s infinite;
}

.whatsapp-icon i {
    font-size: 3.5rem;
    color: #fff;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 15px rgba(37, 211, 102, 0);
    }
}

.whatsapp-content h3 {
    font-size: 2rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.whatsapp-content > p {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.services-list {
    background: var(--light-color);
    padding: 1.5rem;
    border-radius: 10px;
    margin: 2rem 0;
    text-align: left;
}

.services-list h4 {
    font-size: 1.2rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
    text-align: center;
}

.services-list ul {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.services-list li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-color);
}

.services-list li i {
    color: var(--secondary-color);
    font-size: 1rem;
}

.btn-whatsapp {
    display: inline-block;
    background: linear-gradient(135deg, #25D366, #128C7E);
    color: #fff;
    padding: 1.2rem 3rem;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 600;
    transition: var(--transition);
    margin: 1.5rem 0;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}

.btn-whatsapp:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
}

.btn-whatsapp i {
    margin-right: 0.5rem;
    font-size: 1.4rem;
    vertical-align: middle;
}

.whatsapp-note {
    margin-top: 1.5rem;
    font-size: 1rem;
    color: var(--text-color);
}

.whatsapp-note strong {
    color: var(--primary-color);
}

/* ===========================
   Contact Section
   =========================== */
.contact {
    padding: 80px 0;
}

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

.contact-card {
    text-align: center;
    padding: 2rem;
    background: var(--light-color);
    border-radius: 10px;
    transition: var(--transition);
}

.contact-card:hover {
    background: #fff;
    box-shadow: var(--shadow);
}

.contact-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: var(--dark-color);
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
}

.footer-section h3 i {
    color: var(--primary-color);
}

.footer-section p {
    opacity: 0.8;
    line-height: 1.8;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a,
.footer-section ul li {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: #fff;
    padding-left: 5px;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.8;
}

.footer-bottom a {
    color: #fff;
    text-decoration: none;
}

.footer-bottom a:hover {
    text-decoration: underline;
}

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

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: #fff;
        width: 100%;
        padding: 2rem;
        box-shadow: var(--shadow);
        transition: var(--transition);
    }

    .nav-links.active {
        left: 0;
    }

    .hero {
        min-height: 600px;
        height: 100vh;
    }

    .hero-content {
        padding: 1.5rem;
    }

    .hero-title {
        font-size: 2rem;
        margin-bottom: 1rem;
    }

    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }

    .hero-buttons {
        gap: 0.75rem;
    }

    .btn {
        padding: 0.875rem 1.75rem;
        font-size: 1rem;
    }

    .carousel-control {
        width: 40px;
        height: 40px;
    }

    .carousel-control.prev {
        left: 10px;
    }

    .carousel-control.next {
        right: 10px;
    }

    .carousel-control i {
        font-size: 1.2rem;
    }

    .carousel-indicators {
        bottom: 20px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-image {
        padding: 3rem;
    }

    .about-image i {
        font-size: 6rem;
    }

    .stats {
        grid-template-columns: 1fr;
    }

    .services-grid,
    .doctors-grid {
        grid-template-columns: 1fr;
    }

    .services-list ul {
        grid-template-columns: 1fr;
    }

    .whatsapp-content {
        padding: 2rem 1.5rem;
    }

    .btn-whatsapp {
        padding: 1rem 2rem;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .hero {
        min-height: 500px;
        height: 100vh;
    }

    .hero-content {
        padding: 1rem;
    }

    .hero-title {
        font-size: 1.6rem;
        margin-bottom: 0.75rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
        margin-bottom: 1.25rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.95rem;
    }

    .carousel-control {
        width: 35px;
        height: 35px;
    }

    .carousel-control i {
        font-size: 1rem;
    }

    .indicator {
        width: 10px;
        height: 10px;
    }

    .section-title {
        font-size: 2rem;
    }

    .whatsapp-content {
        padding: 1.5rem;
    }

    .whatsapp-icon {
        width: 80px;
        height: 80px;
    }

    .whatsapp-icon i {
        font-size: 2.5rem;
    }

    .whatsapp-content h3 {
        font-size: 1.5rem;
    }

    .btn-whatsapp {
        padding: 0.9rem 1.5rem;
        font-size: 0.95rem;
    }
}