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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px; /* Account for sticky navbar height */
        }

        :root {
            --slate_dark: #1f2d39;
            --slate_light: #364f65;
            --white: #FFFFFF;
            --cloud: #d9f0f5;
            --lightest_blue: #e9fef3;
            --gentle_aqua: #c8fefe;
            --lake_blue: #5fc2e9;
            --salmon: #e9685f;
            --chocolate: #310600;
            --orange: #df210f; 
            --graphite: #808080;
            --carbon: #A9A9A9;
            --neutral: #EFEFEF;
            --sky: #CAEBF2;
            --dark_cloud: #a3b5b7;
            --light_cloud: #e5f8ff;
            --ultralight_cloud: #f5fbff;
            --dark_sea: #002231;
            --sea_flash: #005479;
            --sea_gradient_33: #057B8C;
            --sea_gradient_66: #08969A;
            --bright_sea: #0DBEAE;
        }

        body {
            font-family: 'Noto Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
            line-height: 1.6;
            color: var(--slate_dark);
            background-color: var(--neutral);
        }

        /* Navigation */
        nav {
            background: var(--dark_sea);
            padding: 1rem 2rem;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 100;
        }

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

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

        .logo-img {
            height: 45px;
            width: auto;
        }

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

        nav a {
            color: var(--white);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }

        nav a:hover {
            color: var(--carbon);
        }

        /* Hamburger Menu */
        .hamburger {
            display: none;
            flex-direction: column;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 0;
            z-index: 1001;
        }

        .hamburger span {
            width: 25px;
            height: 3px;
            background: var(--white);
            margin: 3px 0;
            transition: all 0.3s ease;
            border-radius: 3px;
        }

        /* Hamburger Animation when active */
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(8px, 8px);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(7px, -7px);
        }

        /* Hero Section */
        .hero {
            background: url('images/hero/hero_base_desktop.png') top center no-repeat;
            background-size: 100% auto;
            display: flex;
            justify-content: flex-end;
            padding: 0;
            min-height: 62.5vw;
        }

        .hero-content {
            width: 60%;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            padding: 4rem 2rem;
            gap: 1.5rem;
        }

        .hero-logo {
            width: clamp(200px, 23vw, 280px);
            height: auto;
        }

        .hero-title {
            font-family: 'Montserrat', sans-serif;
            font-size: clamp(2.5rem, 4.5vw, 4.5rem);
            font-weight: 700;
            color: var(--dark_sea);
            margin: 0;
            line-height: 1.1;
        }

        .hero-tagline {
            font-family: 'Noto Sans', sans-serif;
            font-size: clamp(1.3rem, 2vw, 2rem);
            font-weight: 700;
            color: var(--dark_sea);
            margin: 0;
            line-height: 1.3;
        }

        .hero-description {
            font-family: 'Noto Sans', sans-serif;
            font-size: clamp(1rem, 1.3vw, 1.3rem);
            font-weight: 400;
            color: var(--dark_sea);
            margin: 0;
            max-width: 600px;
            line-height: 1.5;
        }

        /* Buttons */
        .btn-group {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            padding: clamp(0.6rem, 1.5vw, 0.8rem) clamp(1.2rem, 3vw, 2rem);
            font-size: clamp(0.9rem, 1.8vw, 1rem);
            font-weight: 600;
            border-radius: 8px;
            text-decoration: none;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            cursor: pointer;
            border: none;
            /* Subtle shadow for depth */
            box-shadow:
                0 1px 3px rgba(0,0,0,0.12),
                0 2px 6px rgba(0,0,0,0.08);
        }

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

        .btn-primary:hover {
            background: var(--sea_gradient_33);
            color: var(--cloud);
            border: 2px solid var(--sea_gradient_33);
            /* Enhanced shadow on hover */
            box-shadow:
                0 2px 4px rgba(0,0,0,0.14),
                0 4px 12px rgba(0,0,0,0.12);
            transform: translateY(-2px);
        }

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

        .btn-secondary:hover {
            background: var(--sea_gradient_33);
            color: var(--cloud);
            border: 2px solid var(--sea_gradient_33);
            /* Enhanced shadow on hover */
            box-shadow:
                0 2px 4px rgba(0,0,0,0.14),
                0 4px 12px rgba(0,0,0,0.12);
            transform: translateY(-2px);
        }

        /* Container */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        /* Sections */
        section {
            padding: 5rem 2rem;
        }

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

        /* Gradient underline accent for section titles */
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--sea_flash) 0%, var(--bright_sea) 100%);
            border-radius: 2px;
            transition: width 0.8s ease-out;
        }

        /* Animate underline when section title becomes visible */
        .section-title.visible::after {
            width: 80px;
        }

        .section-subtitle {
            font-size: 1.3rem;
            color: var(--slate_light);
            margin-bottom: 3rem;
            text-align: center;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Consistent styling for section body paragraphs */
        .section-text {
            font-size: 1.3rem;
            color: var(--slate_light);
            text-align: left;
            max-width: 900px;
            margin: 0 auto 1.5rem;
        }

        /* Grid Layouts */
        .grid {
            display: grid;
            gap: 2rem;
            margin-top: 3rem;
        }

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

        .grid-4 {
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        }

        /* Cards */
        .card {
            background: var(--white);
            padding: 2rem;
            border-radius: 12px;
            /* Multi-layer shadows for depth perception */
            box-shadow:
                0 1px 3px rgba(0,0,0,0.08),
                0 1px 2px rgba(0,0,0,0.12),
                0 4px 12px rgba(0,0,0,0.05);
            border: 1px solid rgba(0,0,0,0.05);
            position: relative;
            overflow: hidden;
        }

        /* Gradient border effect using pseudo-element */
        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            border-radius: 12px;
            padding: 2px;
            background: linear-gradient(135deg, var(--sea_flash), var(--bright_sea));
            -webkit-mask:
                linear-gradient(#fff 0 0) content-box,
                linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            opacity: 0;
            transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* Card hover effects - only on devices with hover capability (desktop) */
        @media (hover: hover) {
            .card {
                transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            }

            .card:hover {
                background: var(--white);
                transform: translateY(-4px) scale(1.02);
                /* Enhanced shadow on hover for "lifting" effect */
                box-shadow:
                    0 4px 6px rgba(0,0,0,0.1),
                    0 8px 16px rgba(0,0,0,0.08),
                    0 16px 32px rgba(0,0,0,0.06);
            }

            .card:hover::before {
                opacity: 1;
            }
        }

        .card h3 {
            color: var(--dark_sea);
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }

        .card-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        /* Info Cards - for informational content boxes */
        .info-card {
            background: var(--white);
            padding: 2rem;
            border-radius: 12px;
            /* Multi-layer shadows for depth */
            box-shadow:
                0 1px 3px rgba(0,0,0,0.08),
                0 1px 2px rgba(0,0,0,0.12),
                0 4px 12px rgba(0,0,0,0.05);
        }

        .info-card h3 {
            color: var(--dark_sea);
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }

        /* Image Placeholder */
        .img-placeholder {
            background: var(--cloud);
            border: 2px dashed var(--slate_light);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--slate_light);
            font-size: 0.9rem;
            text-align: center;
            padding: 2rem;
            min-height: 200px;
        }

        /* Process Steps with Timeline */
        .process-steps {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 1rem;
            margin: 3rem 0;
            flex-wrap: wrap;
            position: relative;
        }

        /* Timeline connecting line - only on desktop and only for timeline class */
        @media (min-width: 769px) {
            .process-steps.timeline::before {
                content: '';
                position: absolute;
                top: 30px; /* Center on step numbers (60px height / 2) */
                left: 16.67%;
                right: 16.67%;
                height: 4px;
                background: linear-gradient(90deg, var(--sea_flash) 0%, var(--bright_sea) 100%);
                border-radius: 2px;
                z-index: 0;
                opacity: 0.3;
            }

            /* Animated progress line */
            .process-steps.timeline::after {
                content: '';
                position: absolute;
                top: 30px;
                left: 16.67%;
                height: 4px;
                background: linear-gradient(90deg, var(--sea_flash) 0%, var(--bright_sea) 100%);
                border-radius: 2px;
                z-index: 0;
                width: 0;
            }

            /* Timeline animation when steps become visible */
            .process-steps.timeline.visible::after {
                animation: timelineProgress 3.5s ease-out forwards;
                animation-delay: 0.5s;
            }

            @keyframes timelineProgress {
                to {
                    width: 66.66%; /* 3 steps: from 16.67% to 83.33% */
                }
            }
        }

        .step {
            flex: 1;
            min-width: 200px;
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .step-number {
            width: 60px;
            height: 60px;
            background: var(--dark_sea);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: bold;
            margin: 0 auto 1rem;
            position: relative;
            z-index: 2;
            /* Add subtle shadow for depth */
            box-shadow:
                0 2px 4px rgba(0,0,0,0.1),
                0 4px 8px rgba(0,0,0,0.08);
            /* Add ring effect - default color */
            border: 3px solid var(--white);
        }

        /* Gradient-colored borders for timeline step numbers */
        .timeline .step:nth-child(1) .step-number {
            border-color: var(--sea_flash); /* 0% of gradient */
        }

        .timeline .step:nth-child(3) .step-number {
            border-color: var(--sea_gradient_33); /* 33% of gradient */
        }

        .timeline .step:nth-child(5) .step-number {
            border-color: var(--bright_sea); /* 100% of gradient */
        }

        .arrow {
            flex: 0;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* Desktop: show horizontal arrows, hide vertical */
        @media (min-width: 769px) {
            .arrow {
                display: flex;
                align-items: center;
                justify-content: center;
                /* Align with center of step images: step-number (60px) + margin (1rem ≈ 16px) + half of image height (150px) */
                margin-top: 226px;
            }

            .arrow-horizontal {
                display: block;
            }

            .arrow-vertical {
                display: none;
            }
        }

        /* Team Section */
        .team-member {
            display: flex;
            gap: 2rem;
            align-items: start;
            background: var(--white);
            padding: 2rem;
            border-radius: 12px;
            /* Multi-layer shadows for depth */
            box-shadow:
                0 1px 3px rgba(0,0,0,0.08),
                0 1px 2px rgba(0,0,0,0.12),
                0 4px 12px rgba(0,0,0,0.05);
        }

        .team-photo {
            width: 150px;
            height: 150px;
            border-radius: 12px;
            flex-shrink: 0;
            object-fit: cover;
        }

        .team-info h3 {
            color: var(--dark_sea);
            font-size: 1.8rem;
            margin-bottom: 0.5rem;
        }

        .team-info .role {
            color: var(--dark_sea);
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }

        /* Contact Form */
        .contact-form {
            max-width: 600px;
            margin: 2rem auto;
            background: var(--white);
            padding: 2rem;
            border-radius: 12px;
            /* Multi-layer shadows for depth */
            box-shadow:
                0 1px 3px rgba(0,0,0,0.08),
                0 1px 2px rgba(0,0,0,0.12),
                0 4px 12px rgba(0,0,0,0.05);
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--slate_dark);
        }

        input, select, textarea {
            width: 100%;
            padding: 0.8rem;
            background: var(--white);
            border: 1px solid var(--sky);
            border-radius: 6px;
            font-size: 1rem;
            font-family: inherit;
        }

        textarea {
            min-height: 150px;
            resize: vertical;
        }

        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--bright_sea);
        }

        /* Footer */
        footer {
            background: var(--dark_sea);
            color: var(--white);
            padding: 3rem 2rem 1rem;
            text-align: center;
        }

        footer a {
            color: var(--bright_sea);
            text-decoration: none;
        }

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

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
        }

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

        .footer-info p {
            margin-bottom: 0.5rem;
        }

        .copyright {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 1rem;
            margin-top: 2rem;
            font-size: 0.9rem;
            opacity: 0.8;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .hero {
                background: url('images/hero/hero_base_mobile.png') top center no-repeat;
                background-size: 100% auto;
                justify-content: center;
                min-height: 150vw;
            }

            .hero-content {
                width: 100%;
                padding: 3rem 1.5rem;
            }

            .hero-logo {
                width: clamp(120px, 24vw, 180px);
            }

            .hero-title {
                font-size: clamp(1.8rem, 7vw, 2.8rem);
            }

            .hero-tagline {
                font-size: clamp(1rem, 4vw, 1.6rem);
            }

            .hero-description {
                font-size: clamp(0.9rem, 3vw, 1.1rem);
            }

            /* Mobile Menu */
            .hamburger {
                display: flex;
            }

            .logo-img {
                height: 35px;
            }

            nav ul {
                position: fixed;
                left: -100%;
                top: 60px;
                flex-direction: column;
                background-color: var(--dark_sea);
                width: 100%;
                text-align: center;
                transition: left 0.3s ease;
                box-shadow: 0 10px 27px rgba(0, 0, 0, 0.3);
                gap: 0;
                padding: 2rem 0;
            }

            nav ul.active {
                left: 0;
            }

            nav ul li {
                margin: 0;
            }

            nav ul li a {
                display: block;
                padding: 1rem;
                font-size: 1.1rem;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }

            nav ul li:last-child a {
                border-bottom: none;
            }

            .team-member {
                flex-direction: column;
                text-align: center;
            }

            .team-photo {
                margin: 0 auto;
            }

            .process-steps {
                flex-direction: column;
                align-items: center;
            }

            /* Mobile: show vertical arrows, hide horizontal */
            .arrow {
                display: flex;
                align-items: center;
                justify-content: center;
                width: 100%;
            }

            .arrow-horizontal {
                display: none;
            }

            .arrow-vertical {
                display: block;
            }

            .step {
                align-items: center;
            }

            /* Tooth Diagram - Mobile */
            .tooth-diagram-grid {
                grid-template-columns: 1fr !important;
            }

            .tooth-diagram-wrapper {
                order: -1;
            }
        }

        /* Utility Classes */
        .text-center {
            text-align: center;
        }

        .mb-2 {
            margin-bottom: 2rem;
        }

        .highlight {
            /* Gradient text effect for key phrases */
            background: linear-gradient(135deg, var(--sea_flash) 0%, var(--bright_sea) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-weight: 600;
        }

        .bg-highlight {
            background: var(--white);
            padding: 1.5rem;
            border-radius: 8px;
            /* Gradient left border accent */
            border-left: 4px solid transparent;
            border-image: linear-gradient(to bottom, var(--sea_flash), var(--bright_sea)) 1;
            margin: 2rem 0;
            /* Subtle shadow for depth */
            box-shadow:
                0 1px 2px rgba(0,0,0,0.06),
                0 2px 8px rgba(0,0,0,0.04);
        }

        /* Scroll Animations */
        .fade-in {
            opacity: 0;
            transition: opacity 0.8s ease-out;
        }

        .fade-in.visible {
            opacity: 1;
        }

        /* Stagger animation delays for consecutive fade-in elements */
        .fade-in:nth-child(1) { transition-delay: 0.1s; }
        .fade-in:nth-child(2) { transition-delay: 0.2s; }
        .fade-in:nth-child(3) { transition-delay: 0.3s; }
        .fade-in:nth-child(4) { transition-delay: 0.4s; }

        .slide-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s ease-out, transform 0.8s ease-out;
        }

        .slide-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Stagger animation delays for groups of elements */
        .slide-up:nth-child(1) { transition-delay: 0s; }
        .slide-up:nth-child(2) { transition-delay: 0.1s; }
        .slide-up:nth-child(3) { transition-delay: 0.2s; }
        .slide-up:nth-child(4) { transition-delay: 0.3s; }

        /* Animated Numbers */
        .animated-number {
            font-weight: 700;
        }

        /* Hero Section Animations */
        .hero-animate {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.8s ease-out, transform 0.8s ease-out;
        }

        .hero-animate.visible {
            opacity: 1;
            transform: translateY(0);
        }