/* ==========================================================================
   CSS Variables & Theme Setup (Based on Letterhead Colors)
   ========================================================================== */
:root {
    --primary-blue: #0066FF; /* Vibrant blue from letterhead */
    --accent-purple: #D8D8FF; /* Soft lavender from background watermark */
    --text-main: #333333;
    --text-light: #666666;
    --bg-light: #F8F9FA;
    --white: #FFFFFF;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-secondary: 'Poppins', sans-serif;
    
    /* Transitions & Shadows */
    --transition-fast: 0.3s ease;
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 15px 40px rgba(0, 102, 255, 0.15);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    color: var(--text-main);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--primary-blue);
}

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

a {
    text-decoration: none;
    color: var(--primary-blue);
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.section-padding {
    padding: 5rem 0;
}

.text-center {
    text-align: center;
}

.bg-light {
    background-color: var(--bg-light);
}

.bg-primary {
    background-color: var(--primary-blue);
    color: var(--white);
}

.bg-primary h2, .bg-primary p {
    color: var(--white);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-family: var(--font-secondary);
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition-fast);
    text-align: center;
}

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

.btn-primary:hover {
    background-color: #0052cc;
    box-shadow: 0 5px 15px rgba(0, 102, 255, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--white);
    color: var(--primary-blue);
    border-color: var(--primary-blue);
}

.btn-secondary:hover {
    background-color: var(--accent-purple);
    border-color: var(--accent-purple);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-main);
    font-weight: 500;
    font-family: var(--font-secondary);
}

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

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

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-blue);
    transition: var(--transition-fast);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    background: linear-gradient(135deg, rgba(216,216,255,0.3) 0%, rgba(255,255,255,1) 100%);
    padding: 6rem 0;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.hero-text p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-image {
    flex: 1;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

/* ==========================================================================
   Intro Section
   ========================================================================== */
.intro-container {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.intro-image {
    flex: 1;
    border-radius: 20px;
    overflow: hidden;
}

.intro-text {
    flex: 1;
}

.link-arrow {
    font-weight: 600;
    font-family: var(--font-secondary);
    display: inline-flex;
    align-items: center;
    margin-top: 1rem;
}

.link-arrow:hover {
    transform: translateX(5px);
}

/* ==========================================================================
   Services Section (Grid)
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-fast);
    border-bottom: 4px solid var(--accent-purple);
}

.service-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.service-content {
    padding: 2rem;
}

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

.feature-box {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* ==========================================================================
   Appointment Form Section
   ========================================================================== */
.appointment-container {
    display: flex;
    gap: 4rem;
    align-items: flex-start;
}

.appointment-text {
    flex: 1;
}

.appointment-form-wrapper {
    flex: 1;
    width: 100%;
}

.shadow-box {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.text-dark {
    color: var(--primary-blue);
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-main);
    font-weight: 500;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: var(--font-primary);
    transition: var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-status {
    margin-top: 1rem;
    font-weight: 600;
    text-align: center;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: var(--bg-light);
    padding: 4rem 0 2rem;
    border-top: 1px solid #ddd;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

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

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid #ddd;
    font-size: 0.9rem;
    color: var(--text-light);
}

/* ==========================================================================
   Animations & Hover Effects
   ========================================================================== */
.hover-anim:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

/* Entrance Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Initial Load Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 1.2s ease-out forwards;
}

.slide-up {
    animation: slideUp 1s ease-out forwards;
}

/* ==========================================================================
   Responsive Media Queries
   ========================================================================== */
@media (max-width: 992px) {
    .hero-content, .intro-container, .appointment-container {
        flex-direction: column;
    }
    
    .hero-text h1 {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .navbar .nav-links, .navbar .btn {
        display: none; /* Mobile menu hidden by default, toggled via JS */
    }
    
    .navbar.active {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        box-shadow: var(--shadow-md);
        padding: 2rem;
        flex-direction: column;
        display: flex;
    }
    
    .navbar.active .nav-links {
        display: flex;
        flex-direction: column;
        width: 100%;
        margin-bottom: 1rem;
    }
    
    .navbar.active .btn {
        display: block;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
}