/* Root Variables */
:root {
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-dark: #2d3748;
    --text-light: #4a5568;
    --text-muted: #718096;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --success-color: #48bb78;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.container-compact {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
}

.nav-brand {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-image {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 32px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    font-size: 15px;
}

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

.cta-button-nav {
    background: var(--primary-color);
    color: white !important;
    padding: 10px 24px;
    border-radius: 8px;
    transition: var(--transition);
}

.cta-button-nav:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    border-radius: 3px;
    transition: var(--transition);
}

/* Buttons */
.button {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 16px;
    text-align: center;
}

.button-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: var(--shadow-md);
}

.button-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.button-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.button-primary-large {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 18px 48px;
    font-size: 18px;
    box-shadow: var(--shadow-lg);
}

.button-primary-large:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.button-secondary-large {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 18px 48px;
    font-size: 18px;
}

.button-secondary-large:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

/* Section Common Styles */
section {
    padding: 96px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.section-subtitle {
    font-size: 20px;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
}

/* Hero Section */
.hero {
    padding: 160px 0 120px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    margin-top: 60px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" xmlns="http://www.w3.org/2000/svg"><circle cx="30" cy="30" r="1" fill="white" opacity="0.1"/></svg>');
    opacity: 0.4;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 56px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -2px;
}

.hero-subtitle {
    font-size: 22px;
    line-height: 1.6;
    margin-bottom: 40px;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-placeholder {
    width: 100%;
    max-width: 500px;
    animation: float 6s ease-in-out infinite;
}

.hero-image-placeholder svg {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.2));
}

.hero-logo-container {
    margin-bottom: 32px;
    text-align: center;
}

.hero-logo {
    max-width: 300px;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    background: white;
    padding: 16px;
}

/* Virtual Clinic Section */
.virtual-clinic {
    background: linear-gradient(to bottom, var(--bg-light), var(--bg-white));
}

.virtual-clinic-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.virtual-clinic-image {
    position: relative;
}

.clinic-service-image {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
}

.virtual-clinic-features {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.clinic-feature {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 24px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.clinic-feature:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.clinic-feature .feature-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.clinic-feature .feature-icon svg {
    width: 24px;
    height: 24px;
    stroke: white;
}

.clinic-feature .feature-content h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.clinic-feature .feature-content p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.6;
}

/* Mission Section */
.mission {
    background: var(--bg-white);
}

.mission-image-container {
    max-width: 800px;
    margin: 0 auto 48px;
    text-align: center;
}

.mission-image {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.mission-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.mission-card {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.mission-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.icon-wrapper {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.icon-wrapper svg {
    width: 32px;
    height: 32px;
    stroke: white;
}

.mission-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.mission-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* How It Works Section */
.how-it-works {
    background: var(--bg-light);
}

.steps-container {
    display: flex;
    flex-direction: column;
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 32px;
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.step:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
}

.step-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    font-weight: 800;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.step-content p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 17px;
}

/* Use Cases Section */
.use-cases {
    background: var(--bg-white);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.use-case-card {
    background: white;
    padding: 36px;
    border-radius: 12px;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.use-case-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.use-case-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.use-case-icon svg {
    width: 28px;
    height: 28px;
    stroke: white;
}

.use-case-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.use-case-card p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 15px;
}

/* AI Assistant Section - Compact and Minimal */
.ai-assistant {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    padding: 56px 0;
}

.ai-assistant-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.ai-assistant-title {
    font-size: 36px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.ai-assistant-subtitle {
    font-size: 24px;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 20px;
    font-style: italic;
}

.ai-assistant-body {
    font-size: 18px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 32px;
}

.ai-assistant-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
    text-align: left;
    max-width: 700px;
    margin: 0 auto;
}

.ai-assistant-features li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 16px;
    color: var(--text-dark);
    line-height: 1.6;
}

.ai-assistant-features svg {
    width: 20px;
    height: 20px;
    stroke: var(--success-color);
    flex-shrink: 0;
    margin-top: 2px;
}

/* Security Section */
.security {
    background: var(--bg-white);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.security-card {
    background: white;
    padding: 36px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.security-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.security-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.security-icon svg {
    width: 36px;
    height: 36px;
    stroke: white;
}

.security-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.security-card p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 15px;
}

/* Who It's For Section */
.who-its-for {
    background: var(--bg-light);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.audience-card {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border-left: 4px solid var(--primary-color);
}

.audience-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-left-color: var(--secondary-color);
}

.audience-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.audience-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* Call to Action Section */
.cta {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    text-align: center;
    padding: 96px 0;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 48px;
    font-weight: 900;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.cta-subtitle {
    font-size: 22px;
    margin-bottom: 40px;
    opacity: 0.95;
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.cta-note {
    font-size: 16px;
    opacity: 0.85;
    font-style: italic;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 64px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 64px;
    margin-bottom: 48px;
}

.footer-brand h3 {
    font-size: 28px;
    margin-bottom: 12px;
    color: var(--primary-color);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-column h4 {
    font-size: 18px;
    margin-bottom: 16px;
    font-weight: 700;
}

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

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

.animate-fade-in {
    animation: fadeIn 0.8s ease-out;
}

.animate-fade-in-delay {
    animation: fadeIn 0.8s ease-out 0.2s both;
}

.animate-fade-in-delay-2 {
    animation: fadeIn 0.8s ease-out 0.4s both;
}

.animate-slide-up {
    animation: fadeIn 1s ease-out 0.3s both;
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Mobile Responsive Styles */
@media (max-width: 768px) {
    /* Navigation */
    .navbar .container {
        padding: 12px 16px;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 16px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-menu li {
        padding: 12px 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu a {
        display: block;
    }

    .cta-button-nav {
        margin-top: 8px;
        text-align: center;
    }

    /* Container */
    .container, .container-compact {
        padding: 0 16px;
    }

    /* Sections */
    section {
        padding: 64px 0;
    }

    .section-title {
        font-size: 32px;
    }

    .section-subtitle {
        font-size: 18px;
    }

    /* Hero */
    .hero {
        padding: 100px 0 80px;
    }

    .hero .container {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .hero-title {
        font-size: 36px;
        letter-spacing: -1px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .button {
        width: 100%;
        padding: 16px 32px;
        font-size: 18px;
    }

    .hero-logo {
        max-width: 200px;
    }

    /* Virtual Clinic */
    .virtual-clinic-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .virtual-clinic-image {
        order: -1;
    }

    .clinic-feature {
        padding: 20px;
    }

    .clinic-feature .feature-icon {
        width: 40px;
        height: 40px;
    }

    .clinic-feature .feature-icon svg {
        width: 20px;
        height: 20px;
    }

    .clinic-feature .feature-content h3 {
        font-size: 18px;
    }

    .clinic-feature .feature-content p {
        font-size: 15px;
    }

    /* Mission */
    .mission-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .mission-card {
        padding: 32px;
    }

    /* How It Works */
    .step {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 32px 24px;
    }

    .step-number {
        width: 60px;
        height: 60px;
        font-size: 28px;
        margin: 0 auto;
    }

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

    .step-content h3 {
        font-size: 22px;
    }

    .step-content p {
        font-size: 16px;
    }

    /* Use Cases */
    .use-cases-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .use-case-card {
        padding: 28px;
    }

    /* AI Assistant */
    .ai-assistant {
        padding: 48px 0;
    }

    .ai-assistant-title {
        font-size: 28px;
    }

    .ai-assistant-subtitle {
        font-size: 20px;
    }

    .ai-assistant-body {
        font-size: 16px;
    }

    .ai-assistant-features {
        gap: 14px;
    }

    .ai-assistant-features li {
        font-size: 15px;
    }

    /* Security */
    .security-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .security-card {
        padding: 32px;
    }

    /* Who It's For */
    .audience-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .audience-card {
        padding: 32px;
    }

    /* CTA */
    .cta {
        padding: 64px 0;
    }

    .cta-title {
        font-size: 32px;
    }

    .cta-subtitle {
        font-size: 18px;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .button-primary-large,
    .button-secondary-large {
        width: 100%;
        padding: 18px 32px;
        font-size: 18px;
    }

    /* Footer */
    .footer {
        padding: 48px 0 24px;
    }

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

    .footer-links {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

/* Tablet Responsive */
@media (min-width: 769px) and (max-width: 1024px) {
    .hero-title {
        font-size: 44px;
    }

    .section-title {
        font-size: 38px;
    }

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

    .use-cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .security-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .audience-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

/* Print Styles */
@media print {
    .navbar,
    .cta,
    .footer {
        display: none;
    }

    section {
        page-break-inside: avoid;
    }
}