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

:root {
    /* Colors - Clean medical aesthetic with soft blues/greens */
    --primary-blue: #2B7A9B;
    --primary-light: #4A9FBF;
    --accent-green: #5FB3A1;
    --background: #FFFFFF;
    --background-light: #F8FAFB;
    --text-dark: #1A2B3C;
    --text-medium: #4A5F73;
    --text-light: #6B7F92;
    --border-color: #E1E8ED;
    --shadow: rgba(43, 122, 155, 0.08);

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 64px;
    --spacing-xxl: 96px;

    /* Container */
    --container-width: 1200px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--text-dark);
    background-color: var(--background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .logo {
        font-size: 22px;
    }
}

/* Navigation */
.nav {
    background: var(--background);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

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

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-blue);
    letter-spacing: -0.5px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background: var(--primary-blue);
    color: white;
    box-shadow: 0 4px 12px var(--shadow);
}

.btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow);
}

.btn-primary-small {
    padding: 10px 24px;
    font-size: 14px;
    background: var(--primary-blue);
    color: white;
    border-radius: 6px;
}

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

.btn-large {
    padding: 18px 48px;
    font-size: 18px;
}

/* Mobile button improvements */
@media (max-width: 768px) {
    .btn {
        padding: 16px 36px;
        font-size: 17px;
        min-height: 48px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .btn-large {
        padding: 20px 40px;
        font-size: 19px;
        min-height: 56px;
    }

    .btn-primary-small {
        padding: 12px 20px;
        font-size: 15px;
        min-height: 44px;
    }
}

/* Hero Section */
.hero {
    padding: var(--spacing-xxl) 0;
    text-align: center;
    background: linear-gradient(135deg, #F8FAFB 0%, #E8F4F8 100%);
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-medium);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .hero {
        padding: var(--spacing-xl) 0 var(--spacing-lg) 0;
    }

    .hero-title {
        font-size: 36px;
        line-height: 1.3;
        margin-bottom: var(--spacing-md);
    }

    .hero-subtitle {
        font-size: 19px;
        line-height: 1.6;
        padding: 0 var(--spacing-xs);
    }
}

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

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.5px;
}

.section-intro {
    font-size: 18px;
    text-align: center;
    color: var(--text-medium);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 768px) {
    .section {
        padding: var(--spacing-xl) 0;
    }

    .section-title {
        font-size: 32px;
        line-height: 1.3;
        margin-bottom: var(--spacing-lg);
    }

    .section-intro {
        font-size: 18px;
        line-height: 1.7;
    }
}

/* Problem Section */
.problem {
    background: var(--background);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto;
}

.problem-card {
    background: var(--background-light);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.problem-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
}

.problem-card p {
    color: var(--text-medium);
    line-height: 1.6;
}

/* Methodology Section */
.methodology {
    background: var(--background-light);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.step {
    background: var(--background);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--primary-blue);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.step-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.step-description {
    color: var(--text-medium);
    line-height: 1.6;
}

/* Science Section */
.science {
    background: var(--background);
}

.science-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.science-card {
    background: var(--background-light);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.science-card h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.science-card p {
    color: var(--text-medium);
    font-size: 14px;
    line-height: 1.5;
}

/* Founder Section */
.founder {
    background: var(--background-light);
}

.founder-content {
    max-width: 800px;
    margin: 0 auto;
    background: var(--background);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.founder-text p {
    color: var(--text-medium);
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.founder-note {
    font-style: italic;
    color: var(--text-light);
    margin-top: var(--spacing-md) !important;
}

/* Offering Section */
.offering {
    background: var(--background);
}

.offering-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
    align-items: center;
}

.offering-main h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.offering-list {
    list-style: none;
    padding: 0;
}

.offering-list li {
    color: var(--text-medium);
    margin-bottom: var(--spacing-sm);
    font-size: 18px;
    line-height: 1.6;
}

.offering-cta {
    background: var(--background-light);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    border: 2px solid var(--primary-blue);
}

.price {
    font-size: 42px;
    font-weight: 800;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
}

.offering-note {
    color: var(--text-light);
    font-size: 14px;
    margin-top: var(--spacing-sm);
}

@media (max-width: 768px) {
    .offering-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

/* FAQ Section */
.faq {
    background: var(--background-light);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--background);
    padding: var(--spacing-md);
    border-radius: 12px;
    margin-bottom: var(--spacing-sm);
    border: 1px solid var(--border-color);
}

.faq-question {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.faq-answer {
    color: var(--text-medium);
    line-height: 1.7;
}

/* Final CTA Section */
.cta-final {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-light) 100%);
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

.cta-title {
    font-size: 42px;
    font-weight: 800;
    color: white;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.5px;
}

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

.cta-final .btn-primary:hover {
    background: var(--background-light);
    transform: translateY(-2px);
}

.cta-note {
    color: rgba(255, 255, 255, 0.9);
    margin-top: var(--spacing-sm);
    font-size: 16px;
}

@media (max-width: 768px) {
    .cta-final {
        padding: var(--spacing-xl) 0;
    }

    .cta-title {
        font-size: 32px;
        line-height: 1.3;
        margin-bottom: var(--spacing-md);
        padding: 0 var(--spacing-sm);
    }

    .cta-note {
        font-size: 17px;
        padding: 0 var(--spacing-sm);
    }
}

/* Footer */
.footer {
    background: var(--text-dark);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.footer-content {
    max-width: 700px;
    margin: 0 auto;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-sm);
}

.footer-text {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
}

.footer-disclaimer {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    line-height: 1.6;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Animations */
@media (prefers-reduced-motion: no-preference) {
    .problem-card,
    .step,
    .science-card,
    .faq-item {
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .problem-card:hover,
    .step:hover,
    .science-card:hover,
    .faq-item:hover {
        transform: translateY(-4px);
        box-shadow: 0 8px 24px var(--shadow);
    }
}

/* Mobile-specific improvements */
@media (max-width: 768px) {
    .problem-card,
    .step,
    .science-card,
    .faq-item {
        padding: var(--spacing-md) var(--spacing-md);
    }

    .problem-card p,
    .step-description,
    .science-card p,
    .faq-answer {
        font-size: 16px;
        line-height: 1.7;
    }

    .science-card h4,
    .faq-question {
        font-size: 19px;
        margin-bottom: var(--spacing-sm);
    }

    .step-title {
        font-size: 22px;
    }

    .problem-icon {
        font-size: 56px;
        margin-bottom: var(--spacing-md);
    }
}