/* 
    Allen Wei DDS - Modern Elegant Dental Website
    Palette: Teal (#0f4c5c), Slate Grey (#36454F), Cream (#F9F7F2), White
    */

    :root {
        --color-primary: #0f4c5c; /* Deep Teal */
        --color-primary-light: #1a6b7f;
        --color-secondary: #36454F; /* Charcoal/Slate */
        --color-accent: #C0C5C9; /* Silver/Grey */
        --color-bg-cream: #F9F7F2;
        --color-bg-white: #FFFFFF;
        --color-text-dark: #1a1a1a;
        --color-text-light: #666666;
        --color-text-inverse: #F9F7F2;
        
        --font-serif: 'Playfair Display', serif;
        --font-sans: 'Lato', sans-serif;
        
        --spacing-container: 1200px;
        --spacing-section: 100px;
        --transition: all 0.3s ease;
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: var(--font-sans);
        background-color: var(--color-bg-cream);
        color: var(--color-text-dark);
        line-height: 1.6;
        -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4 {
        font-family: var(--font-serif);
        font-weight: 400;
        line-height: 1.2;
        color: var(--color-secondary);
    }

    a {
        text-decoration: none;
        color: inherit;
        transition: var(--transition);
    }

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

    .container {
        max-width: var(--spacing-container);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* Typography Utilities */
    .eyebrow {
        display: block;
        font-family: var(--font-sans);
        font-size: 0.85rem;
        letter-spacing: 2px;
        text-transform: uppercase;
        color: var(--color-primary);
        margin-bottom: 16px;
        font-weight: 700;
    }

    .section-header {
        text-align: center;
        margin-bottom: 60px;
    }

    .section-desc {
        color: var(--color-text-light);
        max-width: 600px;
        margin: 16px auto 0;
    }

    /* Buttons */
    .btn {
        display: inline-block;
        padding: 14px 32px;
        font-family: var(--font-sans);
        font-weight: 700;
        letter-spacing: 1px;
        text-transform: uppercase;
        font-size: 0.85rem;
        border-radius: 2px;
        cursor: pointer;
        transition: var(--transition);
    }

    .btn-primary {
        background-color: var(--color-primary);
        color: white;
        border: 2px solid var(--color-primary);
    }

    .btn-primary:hover {
        background-color: var(--color-primary-light);
        border-color: var(--color-primary-light);
    }

    .btn-outline {
        background-color: transparent;
        color: var(--color-primary);
        border: 2px solid var(--color-primary);
    }

    .btn-outline:hover {
        background-color: var(--color-primary);
        color: white;
    }

    .btn-text {
        background: none;
        color: var(--color-secondary);
        padding: 14px 0;
        border-bottom: 1px solid var(--color-secondary);
    }

    .btn-text:hover {
        color: var(--color-primary);
        border-color: var(--color-primary);
    }

    .full-width {
        width: 100%;
    }

    /* Navbar */
    .navbar {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        background-color: rgba(249, 247, 242, 0.95);
        backdrop-filter: blur(10px);
        z-index: 1000;
        border-bottom: 1px solid rgba(0,0,0,0.05);
        padding: 20px 0;
    }

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

    .logo {
        display: flex;
        flex-direction: column;
        line-height: 1;
    }

    .logo-serif {
        font-family: var(--font-serif);
        font-size: 1.5rem;
        color: var(--color-secondary);
        font-weight: 600;
    }

    .logo-sub {
        font-family: var(--font-sans);
        font-size: 0.7rem;
        letter-spacing: 2px;
        text-transform: uppercase;
        color: var(--color-primary);
        margin-top: 4px;
    }

    .nav-links {
        display: flex;
        list-style: none;
        align-items: center;
        gap: 40px;
    }

    .nav-links a {
        font-size: 0.9rem;
        color: var(--color-secondary);
        font-weight: 400;
    }

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

    .mobile-menu-btn {
        display: none;
        background: none;
        border: none;
        cursor: pointer;
        width: 30px;
        height: 24px;
        position: relative;
    }

    .mobile-menu-btn span {
        display: block;
        width: 100%;
        height: 2px;
        background-color: var(--color-secondary);
        position: absolute;
        transition: var(--transition);
    }

    .mobile-menu-btn span:nth-child(1) { top: 0; }
    .mobile-menu-btn span:nth-child(2) { top: 11px; }
    .mobile-menu-btn span:nth-child(3) { top: 22px; }

    /* Hero Section */
    .hero {
        padding-top: 140px;
        padding-bottom: 80px;
        background-color: var(--color-bg-cream);
        overflow: hidden;
    }

    .hero-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 60px;
        align-items: center;
    }

    .hero-content {
        padding-right: 20px;
    }

    .hero h1 {
        font-size: 3.5rem;
        margin-bottom: 24px;
        color: var(--color-secondary);
    }

    .hero p {
        font-size: 1.125rem;
        color: var(--color-text-light);
        margin-bottom: 40px;
        max-width: 480px;
    }

    .hero-actions {
        display: flex;
        align-items: center;
        gap: 24px;
    }

    .hero-visual {
        position: relative;
    }

    .hero-img-wrapper {
        position: relative;
    }

    .hero-img-wrapper img {
        width: 100%;
        height: 600px;
        object-fit: cover;
        border-radius: 4px;
        box-shadow: 20px 20px 0px var(--color-primary);
    }

    .floating-card {
        position: absolute;
        bottom: -40px;
        left: -40px;
        background-color: white;
        padding: 24px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        display: flex;
        flex-direction: column;
        gap: 8px;
        max-width: 200px;
    }

    .card-label {
        font-size: 0.75rem;
        text-transform: uppercase;
        letter-spacing: 1px;
        color: var(--color-text-light);
    }

    .card-value {
        font-family: var(--font-serif);
        font-size: 1.25rem;
        color: var(--color-primary);
        font-style: italic;
    }

    /* About Section */
    .section {
        padding: var(--spacing-section) 0;
    }

    .about {
        background-color: white;
    }

    .about-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 80px;
        align-items: center;
    }

    .about-image img {
        width: 100%;
        height: 500px;
        object-fit: cover;
        border-radius: 4px;
    }

    .about-content h2 {
        font-size: 2.5rem;
        margin-bottom: 24px;
    }

    .about-content p {
        color: var(--color-text-light);
        margin-bottom: 20px;
        font-size: 1.05rem;
    }

    .feature-list {
        list-style: none;
        margin-top: 32px;
        display: grid;
        gap: 16px;
    }

    .feature-list li {
        display: flex;
        align-items: center;
        gap: 16px;
        font-weight: 700;
        color: var(--color-secondary);
    }

    .feature-list svg {
        color: var(--color-primary);
    }

    /* Services Section */
    .services {
        background-color: var(--color-bg-cream);
    }

    .services-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 40px;
    }

    .service-card {
        background-color: white;
        padding: 40px;
        border-radius: 4px;
        transition: var(--transition);
        border: 1px solid transparent;
    }

    .service-card:hover {
        transform: translateY(-10px);
        box-shadow: 0 20px 40px rgba(0,0,0,0.08);
        border-color: var(--color-primary);
    }

    .icon-box {
        width: 60px;
        height: 60px;
        background-color: rgba(15, 76, 92, 0.1);
        color: var(--color-primary);
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        margin-bottom: 24px;
    }

    .service-card h3 {
        font-size: 1.5rem;
        margin-bottom: 16px;
    }

    .service-card p {
        color: var(--color-text-light);
        font-size: 0.95rem;
    }

    /* Gallery */
    .gallery {
        padding: 0;
        background-color: var(--color-secondary);
    }

    .gallery-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
    }

    .gallery-item {
        position: relative;
        overflow: hidden;
        height: 400px;
    }

    .gallery-item img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.6s ease;
    }

    .gallery-item:hover img {
        transform: scale(1.05);
    }

    .gallery-overlay {
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
        padding: 24px;
        color: white;
        opacity: 0;
        transform: translateY(10px);
        transition: var(--transition);
    }

    .gallery-item:hover .gallery-overlay {
        opacity: 1;
        transform: translateY(0);
    }

    /* Contact Section */
    .contact {
        background-color: white;
    }

    .contact-wrapper {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 80px;
        margin-bottom: 60px;
    }

    .contact-info h2 {
        font-size: 2.5rem;
        margin-bottom: 24px;
    }

    .contact-info p {
        color: var(--color-text-light);
        margin-bottom: 40px;
    }

    .info-block {
        margin-bottom: 32px;
    }

    .info-block h4 {
        font-family: var(--font-sans);
        font-size: 0.85rem;
        text-transform: uppercase;
        letter-spacing: 1px;
        color: var(--color-primary);
        margin-bottom: 8px;
    }

    .info-block p {
        color: var(--color-secondary);
        font-size: 1.1rem;
        margin-bottom: 0;
        font-family: var(--font-serif);
    }

    .info-block a {
        color: var(--color-secondary);
    }

    .info-block a:hover {
        color: var(--color-primary);
    }

    .contact-form {
        background-color: var(--color-bg-cream);
        padding: 40px;
        border-radius: 4px;
    }

    .form-group {
        margin-bottom: 24px;
    }

    .form-group label {
        display: block;
        font-size: 0.85rem;
        font-weight: 700;
        margin-bottom: 8px;
        color: var(--color-secondary);
    }

    .form-group input,
    .form-group textarea {
        width: 100%;
        padding: 12px 16px;
        border: 1px solid #ddd;
        background-color: white;
        border-radius: 2px;
        font-family: var(--font-sans);
        font-size: 1rem;
        transition: var(--transition);
    }

    .form-group input:focus,
    .form-group textarea:focus {
        outline: none;
        border-color: var(--color-primary);
    }

    .success-message {
        margin-top: 20px;
        padding: 16px;
        background-color: #e8f5e9;
        color: #2e7d32;
        border-radius: 4px;
        text-align: center;
    }

    .hidden {
        display: none;
    }

    .map-container {
        border-radius: 4px;
        overflow: hidden;
        position: relative;
        height: 300px;
    }

    .map-link {
        display: block;
        width: 100%;
        height: 100%;
        position: relative;
    }

    .map-img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        filter: grayscale(100%);
        transition: var(--transition);
    }

    .map-link:hover .map-img {
        filter: grayscale(0%);
    }

    .map-overlay-btn {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        background-color: white;
        color: var(--color-secondary);
        padding: 12px 24px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 1px;
        font-size: 0.85rem;
        box-shadow: 0 4px 12px rgba(0,0,0,0.2);
        pointer-events: none;
    }

    /* Footer */
    .footer {
        background-color: var(--color-secondary);
        color: white;
        padding: 80px 0 40px;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr;
        gap: 60px;
        margin-bottom: 60px;
    }

    .footer-brand h3 {
        font-size: 1.5rem;
        color: white;
        margin-bottom: 16px;
    }

    .footer-brand p {
        color: rgba(255,255,255,0.7);
        max-width: 300px;
    }

    .footer-links {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .footer-links a {
        color: rgba(255,255,255,0.7);
    }

    .footer-links a:hover {
        color: white;
    }

    .footer-contact {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .footer-contact a {
        color: white;
        font-size: 1.1rem;
    }

    .footer-contact p {
        color: rgba(255,255,255,0.7);
    }

    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.1);
        padding-top: 40px;
        text-align: center;
    }

    .footer-bottom p {
        color: rgba(255,255,255,0.5);
        font-size: 0.85rem;
    }

    /* Animations */
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: all 0.8s ease;
    }

    .reveal.active {
        opacity: 1;
        transform: translateY(0);
    }

    .reveal-left {
        opacity: 0;
        transform: translateX(-30px);
        transition: all 0.8s ease;
    }

    .reveal-left.active {
        opacity: 1;
        transform: translateX(0);
    }

    .reveal-right {
        opacity: 0;
        transform: translateX(30px);
        transition: all 0.8s ease;
    }

    .reveal-right.active {
        opacity: 1;
        transform: translateX(0);
    }

    /* Mobile Menu */
    .mobile-menu-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: var(--color-bg-cream);
        z-index: 999;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 32px;
        transform: translateX(100%);
        transition: transform 0.4s ease-in-out;
    }

    .mobile-menu-overlay.open {
        transform: translateX(0);
    }

    .mobile-link {
        font-family: var(--font-serif);
        font-size: 2rem;
        color: var(--color-secondary);
    }

    .close-menu-btn {
        position: absolute;
        top: 30px;
        right: 30px;
        background: none;
        border: none;
        font-size: 3rem;
        color: var(--color-secondary);
        cursor: pointer;
        line-height: 1;
    }

    /* Responsive */
    @media (max-width: 992px) {
        .hero-grid, .about-grid, .contact-wrapper {
            grid-template-columns: 1fr;
            gap: 40px;
        }

        .hero-content {
            padding-right: 0;
            text-align: center;
        }

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

        .hero-actions {
            justify-content: center;
        }

        .hero-img-wrapper img {
            height: 400px;
        }

        .floating-card {
            left: 20px;
            bottom: -20px;
        }

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

        .footer-grid {
            grid-template-columns: 1fr;
            gap: 40px;
        }
    }

    @media (max-width: 768px) {
        .nav-links {
            display: none;
        }

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

        .gallery-grid {
            grid-template-columns: 1fr;
        }
        
        .gallery-item {
            height: 300px;
        }

        .hero h1 {
            font-size: 2rem;
        }
    }