/* ===================================
   CSS Custom Properties (Design System)
   =================================== */
:root {
    /* Colors */
    --color-primary-green: #2D5016;
    --color-primary-gold: #B8860B;
    --color-primary-off-white: #FAF9F6;
    --color-accent-dark-green: #1A3409;
    --color-accent-light-gold: #DAA520;
    --color-neutral-100: #F5F5F5;
    --color-neutral-200: #E0E0E0;
    --color-neutral-400: #9E9E9E;
    --color-neutral-600: #616161;
    --color-neutral-900: #212121;
    
    /* Typography */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    --font-size-h1: clamp(2.5rem, 5vw, 4rem);
    --font-size-h2: clamp(2rem, 4vw, 3rem);
    --font-size-h3: clamp(1.5rem, 3vw, 2rem);
    --font-size-body: clamp(1rem, 2vw, 1.125rem);
    --font-size-small: clamp(0.875rem, 1.5vw, 1rem);
    
    /* Spacing */
    --spacing-section: clamp(4rem, 10vw, 8rem);
    --spacing-component: clamp(2rem, 5vw, 4rem);
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.6s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: var(--font-size-body);
    line-height: 1.6;
    color: var(--color-neutral-900);
    background-color: var(--color-primary-off-white);
    overflow-x: hidden;
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary-green);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* ===================================
   Navigation Bar
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(250, 249, 246, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h2 {
    font-family: var(--font-heading);
    color: var(--color-primary-green);
    font-size: 1.5rem;
}

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

.nav-links a {
    color: var(--color-neutral-900);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary-gold);
    transition: width var(--transition-normal);
}

.nav-links a:hover::after,
.nav-links a:focus::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--color-primary-green);
    position: relative;
    transition: all var(--transition-normal);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 2px;
    background: var(--color-primary-green);
    transition: all var(--transition-normal);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    bottom: -8px;
}

/* ===================================
   CTA Buttons
   =================================== */
.cta-button {
    background: var(--color-primary-gold);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: var(--font-body);
}

.cta-button:hover,
.cta-button:focus {
    background: var(--color-accent-light-gold);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(184, 134, 11, 0.3);
}

.cta-primary {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.cta-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.25rem;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 2rem 4rem;
    background: linear-gradient(135deg, var(--color-primary-off-white) 0%, #e8f5e9 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="%232D5016" stroke-width="0.5" opacity="0.1"/></svg>');
    background-size: 100px 100px;
    opacity: 0.3;
    z-index: 0;
}

.hero-content {
    max-width: 1440px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    animation: fadeInUp 1s ease;
}

.hero-headline {
    font-family: var(--font-heading);
    font-size: var(--font-size-h1);
    color: var(--color-primary-green);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-tagline {
    font-size: 1.25rem;
    color: var(--color-primary-gold);
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-neutral-600);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-image {
    animation: fadeInRight 1s ease 0.3s both;
}

.doctor-highlight {
    position: relative;
}

.doctor-highlight img {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.doctor-name-badge {
    position: absolute;
    bottom: -20px;
    left: 20px;
    background: white;
    padding: 1.5rem 2rem;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.doctor-name-badge h3 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    color: var(--color-primary-green);
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.doctor-name-badge p {
    font-size: 0.95rem;
    color: var(--color-neutral-600);
}

/* ===================================
   Section Styles
   =================================== */
.section-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: var(--spacing-section) 2rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: var(--font-size-h2);
    color: var(--color-primary-green);
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--color-neutral-600);
    margin-bottom: 3rem;
}

/* ===================================
   Treatment Showcase
   =================================== */
.treatments-section {
    background: white;
}

.treatments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.treatment-card {
    background: var(--color-primary-off-white);
    border-radius: 8px;
    padding: 2rem;
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border: 2px solid transparent;
}

.treatment-card:hover,
.treatment-card:focus {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(45, 80, 22, 0.15);
    border-color: var(--color-primary-gold);
}

.treatment-card-front {
    transition: opacity var(--transition-normal);
}

.treatment-card:hover .treatment-card-front {
    opacity: 0;
}

.treatment-card-back {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 2rem;
    opacity: 0;
    transition: opacity var(--transition-normal);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.treatment-card:hover .treatment-card-back {
    opacity: 1;
}

.treatment-name {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-primary-green);
    margin-bottom: 0.5rem;
}

.treatment-category {
    font-size: 0.875rem;
    color: var(--color-primary-gold);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.treatment-benefits {
    list-style: none;
    margin-bottom: 1rem;
}

.treatment-benefits li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
    color: var(--color-neutral-600);
}

.treatment-benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary-gold);
    font-weight: bold;
}

.learn-more {
    color: var(--color-primary-green);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.learn-more::after {
    content: '→';
    transition: transform var(--transition-fast);
}

.learn-more:hover::after {
    transform: translateX(4px);
}

/* ===================================
   Panchakarma Timeline
   =================================== */
.panchakarma-section {
    background: linear-gradient(to bottom, white, var(--color-primary-off-white));
}

.timeline-container {
    display: flex;
    gap: 2rem;
    margin-top: 3rem;
    position: relative;
}

.timeline-container::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right, var(--color-primary-green), var(--color-primary-gold), var(--color-primary-green));
    z-index: 0;
}

.timeline-step {
    flex: 1;
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    z-index: 1;
}

.timeline-step:hover,
.timeline-step:focus {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(45, 80, 22, 0.2);
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--color-primary-gold);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    font-weight: bold;
    margin: 0 auto 1.5rem;
    font-family: var(--font-heading);
}

.timeline-step h3 {
    font-family: var(--font-heading);
    color: var(--color-primary-green);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    text-align: center;
}

.step-duration {
    text-align: center;
    color: var(--color-primary-gold);
    font-weight: 600;
    margin-bottom: 1rem;
}

.step-description {
    color: var(--color-neutral-600);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.step-treatments {
    list-style: none;
    margin-bottom: 1rem;
}

.step-treatments li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--color-neutral-900);
}

.step-treatments li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary-gold);
    font-size: 1.5rem;
    line-height: 1;
}

.step-benefits {
    background: var(--color-primary-off-white);
    padding: 1rem;
    border-radius: 6px;
    margin-top: 1rem;
}

.step-benefits strong {
    color: var(--color-primary-green);
}

/* ===================================
   Doctor Profile
   =================================== */
.doctor-profile {
    background: white;
}

.doctor-profile-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    align-items: center;
}

.doctor-profile-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.doctor-name {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    color: var(--color-primary-green);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.doctor-credentials {
    font-size: 1.125rem;
    color: var(--color-primary-gold);
    font-weight: 600;
    margin-bottom: 2rem;
}

.doctor-expertise,
.doctor-philosophy,
.doctor-specializations {
    margin-bottom: 2rem;
}

.doctor-expertise h4,
.doctor-philosophy h4,
.doctor-specializations h4 {
    font-family: var(--font-heading);
    color: var(--color-primary-green);
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.doctor-philosophy p {
    font-style: italic;
    color: var(--color-neutral-600);
    line-height: 1.8;
    padding-left: 1rem;
    border-left: 3px solid var(--color-primary-gold);
}

.doctor-specializations ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.doctor-specializations li {
    padding-left: 1.5rem;
    position: relative;
}

.doctor-specializations li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary-gold);
    font-weight: bold;
}

/* ===================================
   Testimonials
   =================================== */
.testimonials-section {
    background: var(--color-primary-off-white);
}

.testimonial-slider {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 4rem;
}

.testimonial-track {
    overflow: hidden;
}

.testimonial-item {
    background: white;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    text-align: center;
    display: none;
}

.testimonial-item.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.testimonial-quote {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--color-neutral-900);
    margin-bottom: 2rem;
    font-style: italic;
}

.testimonial-quote::before {
    content: '"';
    font-size: 3rem;
    color: var(--color-primary-gold);
    font-family: var(--font-heading);
}

.testimonial-author {
    font-weight: 600;
    color: var(--color-primary-green);
    font-size: 1.125rem;
}

.testimonial-treatment {
    color: var(--color-neutral-600);
    font-size: 0.95rem;
}

.testimonial-rating {
    color: var(--color-primary-gold);
    font-size: 1.25rem;
    margin-top: 1rem;
}

.slider-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--color-primary-gold);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.slider-control:hover,
.slider-control:focus {
    background: var(--color-accent-light-gold);
    transform: translateY(-50%) scale(1.1);
}

.slider-control.prev {
    left: 0;
}

.slider-control.next {
    right: 0;
}

.slider-dots {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 2rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-neutral-200);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dot.active {
    background: var(--color-primary-gold);
    transform: scale(1.3);
}

/* ===================================
   Gallery
   =================================== */
.gallery-section {
    background: white;
}

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

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform var(--transition-normal);
}

.gallery-item:hover {
    transform: scale(1.02);
}

.gallery-item img {
    width: 100%;
    height: auto;
    display: block;
}

.gallery-item figcaption {
    padding: 1rem;
    background: white;
    text-align: center;
    color: var(--color-neutral-600);
}

/* ===================================
   Contact Section
   =================================== */
.contact-section {
    background: linear-gradient(135deg, var(--color-primary-green) 0%, var(--color-accent-dark-green) 100%);
    color: white;
}

.contact-section .section-title,
.contact-section .section-subtitle {
    color: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-top: 3rem;
}

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

.contact-item h4 {
    font-family: var(--font-heading);
    color: var(--color-primary-gold);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.contact-item p {
    line-height: 1.8;
}

.contact-item a {
    color: white;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-item a:hover,
.contact-item a:focus {
    color: var(--color-primary-gold);
}

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

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--color-neutral-900);
    color: white;
    padding: 2rem;
    text-align: center;
}

.footer-content p {
    margin: 0.5rem 0;
}

/* ===================================
   Modal
   =================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    padding: 3rem;
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    position: relative;
    animation: slideUp 0.3s ease;
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--color-neutral-600);
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--color-primary-green);
}

.modal-content h3 {
    font-family: var(--font-heading);
    color: var(--color-primary-green);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.booking-options {
    display: grid;
    gap: 1rem;
    margin-top: 2rem;
}

.booking-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    background: var(--color-primary-off-white);
    border-radius: 8px;
    text-decoration: none;
    color: var(--color-neutral-900);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.booking-option:hover,
.booking-option:focus {
    border-color: var(--color-primary-gold);
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

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

.booking-option span:nth-child(2) {
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--color-primary-green);
    margin-bottom: 0.5rem;
}

.booking-detail {
    color: var(--color-neutral-600);
    font-size: 0.95rem;
}

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

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

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

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

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

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: white;
        width: 100%;
        padding: 2rem;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        transition: left var(--transition-normal);
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-cta {
        display: none;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .doctor-name-badge {
        position: static;
        margin-top: 1rem;
    }
    
    .treatments-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline-container {
        flex-direction: column;
    }
    
    .timeline-container::before {
        display: none;
    }
    
    .doctor-profile-content {
        grid-template-columns: 1fr;
    }
    
    .testimonial-slider {
        padding: 2rem 0;
    }
    
    .slider-control {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .doctor-specializations ul {
        grid-template-columns: 1fr;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Visible Styles */
*:focus-visible {
    outline: 3px solid var(--color-primary-gold);
    outline-offset: 2px;
}