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

:root {
    --primary-color: #1A4D7C;
    --secondary-color: #2E7ABF;
    --accent-color: #F0F7FB;
    --dark-color: #0D1F2D;
    --text-color: #2C3E50;
    --light-text: #5A6C7D;
    --white: #FFFFFF;
    --light-bg: #FAFBFC;
    --border-color: #E1E8ED;
    --success-color: #28A745;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.7;
    color: var(--text-color);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.75rem;
    font-weight: 700;
    color: var(--dark-color);
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

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

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

.nav-menu a:hover::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--primary-color);
    margin: 4px 0;
    transition: var(--transition);
    border-radius: 2px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #0D1F2D 0%, #1A4D7C 50%, #2E7ABF 100%);
    color: var(--white);
    padding: 180px 0 120px;
    margin-top: 70px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(46, 122, 191, 0.3) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.35rem;
    margin-bottom: 48px;
    opacity: 0.95;
    line-height: 1.7;
    font-weight: 400;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 16px 36px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
    letter-spacing: 0.01em;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.8);
}

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

/* Product Section */
.product-section {
    background: var(--white);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-bottom: 100px;
}

.problem-card {
    background: var(--white);
    padding: 48px 36px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.problem-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.problem-icon {
    font-size: 3.5rem;
    margin-bottom: 24px;
}

.problem-card h3 {
    font-size: 1.5rem;
    color: var(--dark-color);
    margin-bottom: 16px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.problem-card p {
    color: var(--light-text);
    line-height: 1.8;
    font-size: 1.05rem;
}

.solution-section {
    margin-top: 100px;
}

.solution-content {
    max-width: 1000px;
    margin: 40px auto 0;
}

.solution-text-full h3 {
    font-size: 2.5rem;
    color: var(--dark-color);
    margin-bottom: 24px;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-align: center;
}

.solution-lead {
    color: var(--light-text);
    margin-bottom: 60px;
    font-size: 1.25rem;
    line-height: 1.8;
    text-align: center;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.feature-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 32px;
    background: var(--accent-color);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow);
}

.feature-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--secondary-color);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
    font-size: 1.1rem;
}

.feature-content h4 {
    font-size: 1.15rem;
    color: var(--dark-color);
    margin-bottom: 8px;
    font-weight: 600;
}

.feature-content p {
    color: var(--light-text);
    line-height: 1.6;
    font-size: 0.95rem;
}

.video-section {
    margin-top: 100px;
}

.video-description {
    text-align: center;
    font-size: 1.2rem;
    color: var(--light-text);
    margin-bottom: 48px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.video-container {
    max-width: 1000px;
    margin: 0 auto;
    background: var(--dark-color);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.video-container video {
    width: 100%;
    height: auto;
    display: block;
}

/* Technology Section */
.technology-section {
    background: var(--light-bg);
}

.tech-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-bottom: 80px;
}

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

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

.tech-card h3 {
    font-size: 1.6rem;
    color: var(--dark-color);
    margin-bottom: 16px;
    font-weight: 700;
}

.tech-card p {
    color: var(--light-text);
    line-height: 1.8;
    font-size: 1.05rem;
}

.feedback-cta {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 64px 48px;
    border-radius: 20px;
    text-align: center;
    margin-bottom: 80px;
    box-shadow: var(--shadow-lg);
}

.feedback-cta h3 {
    font-size: 2.25rem;
    margin-bottom: 16px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.feedback-cta p {
    font-size: 1.15rem;
    margin-bottom: 32px;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.feedback-cta .btn {
    background: var(--white);
    color: var(--primary-color);
    font-size: 1.05rem;
    padding: 18px 48px;
    font-weight: 600;
}

.feedback-cta .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.25);
}

.comparison-section {
    background: var(--white);
    padding: 64px;
    border-radius: 20px;
    margin-top: 80px;
    border: 1px solid var(--border-color);
}

.comparison-section h3 {
    font-size: 2.25rem;
    color: var(--dark-color);
    text-align: center;
    margin-bottom: 48px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.comparison-item {
    background: var(--accent-color);
    padding: 36px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.comparison-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.comparison-item h4 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 24px;
    font-weight: 700;
}

.comparison-item ul {
    list-style: none;
}

.comparison-item li {
    padding: 12px 0;
    padding-left: 32px;
    position: relative;
    color: var(--text-color);
    line-height: 1.6;
}

.comparison-item li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Market Section */
.market-section {
    background: var(--white);
}

.market-overview {
    text-align: center;
    max-width: 900px;
    margin: 0 auto 80px;
}

.market-overview h3 {
    font-size: 2.25rem;
    color: var(--dark-color);
    margin-bottom: 24px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.market-overview p {
    font-size: 1.15rem;
    color: var(--light-text);
    line-height: 1.8;
}

.market-segments {
    margin-bottom: 100px;
}

.market-segments h3 {
    font-size: 2.25rem;
    color: var(--dark-color);
    text-align: center;
    margin-bottom: 48px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

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

.segment-card {
    background: var(--light-bg);
    padding: 40px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.segment-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.segment-card h4 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 16px;
    font-weight: 700;
}

.segment-card p {
    color: var(--light-text);
    line-height: 1.7;
    font-size: 1.05rem;
}

.market-drivers {
    margin-bottom: 100px;
}

.market-drivers h3 {
    font-size: 2.25rem;
    color: var(--dark-color);
    text-align: center;
    margin-bottom: 56px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.drivers-content {
    max-width: 950px;
    margin: 0 auto;
}

.driver-item {
    display: flex;
    gap: 32px;
    align-items: flex-start;
    margin-bottom: 48px;
    padding: 36px;
    background: var(--accent-color);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.driver-item:hover {
    box-shadow: var(--shadow);
    border-color: var(--secondary-color);
}

.driver-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--secondary-color);
    min-width: 80px;
    opacity: 0.4;
    line-height: 1;
}

.driver-text h4 {
    font-size: 1.6rem;
    color: var(--dark-color);
    margin-bottom: 12px;
    font-weight: 700;
}

.driver-text p {
    color: var(--light-text);
    line-height: 1.8;
    font-size: 1.05rem;
}

.strategic-section {
    background: var(--light-bg);
    padding: 72px 64px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.strategic-section h3 {
    font-size: 2.25rem;
    color: var(--dark-color);
    text-align: center;
    margin-bottom: 24px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.strategic-intro {
    text-align: center;
    font-size: 1.15rem;
    color: var(--light-text);
    margin-bottom: 56px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.milestone-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
}

.milestone-card {
    text-align: center;
    padding: 40px 32px;
    background: var(--white);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.milestone-card:hover {
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}

.milestone-number {
    display: inline-block;
    width: 64px;
    height: 64px;
    line-height: 64px;
    border-radius: 50%;
    background: var(--secondary-color);
    color: var(--white);
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 24px;
}

.milestone-card h4 {
    font-size: 1.35rem;
    color: var(--dark-color);
    margin-bottom: 16px;
    font-weight: 700;
}

.milestone-card p {
    color: var(--light-text);
    line-height: 1.7;
    font-size: 1.05rem;
}

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

.founder-content {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 72px;
    align-items: start;
    max-width: 1100px;
    margin: 0 auto;
}

.founder-image {
    position: relative;
}

.founder-image img {
    width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.founder-bio h3 {
    font-size: 2.5rem;
    color: var(--dark-color);
    margin-bottom: 12px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.founder-title {
    font-size: 1.2rem;
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: 24px !important;
}

.founder-bio > p {
    font-size: 1.15rem;
    color: var(--light-text);
    line-height: 1.8;
    margin-bottom: 32px;
}

.credentials {
    background: var(--white);
    padding: 36px;
    border-radius: 16px;
    margin-bottom: 32px;
    border: 1px solid var(--border-color);
}

.credentials h4 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 24px;
    font-weight: 700;
}

.credentials-list {
    list-style: none;
}

.credentials-list li {
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-color);
    font-size: 1.05rem;
    line-height: 1.6;
}

.credentials-list li:last-child {
    border-bottom: none;
}

.credentials-list strong {
    color: var(--dark-color);
    display: inline-block;
    min-width: 180px;
    font-weight: 700;
}

.founder-vision {
    padding: 36px;
    background: var(--white);
    border-radius: 16px;
    border-left: 4px solid var(--secondary-color);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--secondary-color);
}

.founder-vision h4 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 16px;
    font-weight: 700;
}

.founder-vision p {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 16px;
    font-size: 1.05rem;
}

.founder-vision p:last-child {
    margin-bottom: 0;
}

/* Patent Section */
.patent-section {
    background: var(--white);
}

.patent-info {
    background: var(--accent-color);
    padding: 48px;
    border-radius: 20px;
    margin-bottom: 48px;
    border: 1px solid var(--border-color);
}

.patent-details h3 {
    font-size: 2.25rem;
    color: var(--dark-color);
    margin-bottom: 24px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.patent-details p {
    margin-bottom: 12px;
    color: var(--text-color);
    line-height: 1.8;
    font-size: 1.05rem;
}

.patent-details strong {
    color: var(--primary-color);
    font-weight: 700;
}

.patent-description {
    margin-top: 24px !important;
    font-size: 1.1rem;
    line-height: 1.8;
}

.patent-viewer {
    width: 100%;
    height: 800px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    background: var(--white);
    box-shadow: var(--shadow-lg);
}

.patent-viewer iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* Contact Section */
.contact-section {
    background: var(--light-bg);
}

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

.contact-info {
    background: var(--white);
    padding: 64px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.contact-info h3 {
    font-size: 2.25rem;
    color: var(--dark-color);
    margin-bottom: 24px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.contact-info p {
    color: var(--light-text);
    margin-bottom: 24px;
    font-size: 1.1rem;
    line-height: 1.8;
}

.contact-info ul {
    list-style: none;
    margin-bottom: 36px;
}

.contact-info li {
    padding: 14px 0;
    padding-left: 36px;
    position: relative;
    color: var(--text-color);
    font-size: 1.05rem;
}

.contact-info li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
    font-size: 1.3rem;
}

.contact-details {
    margin-top: 48px;
    padding-top: 36px;
    border-top: 1px solid var(--border-color);
}

.contact-details p {
    margin-bottom: 12px;
}

.partnership-cta {
    margin: 48px 0 36px;
    text-align: center;
}

.partnership-cta .btn {
    font-size: 1.1rem;
    padding: 18px 48px;
}

.btn-large {
    font-size: 1.1rem !important;
    padding: 18px 56px !important;
}

/* Footer */
.footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 72px 0 36px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 72px;
    margin-bottom: 48px;
}

.footer-brand h3 {
    font-size: 2rem;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
    font-weight: 800;
}

.footer-brand p {
    opacity: 0.8;
    line-height: 1.7;
    font-size: 1.05rem;
}

.footer-links {
    display: flex;
    gap: 72px;
}

.footer-column h4 {
    font-size: 1.25rem;
    margin-bottom: 24px;
    font-weight: 700;
}

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

.footer-column li {
    margin-bottom: 14px;
}

.footer-column a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
    font-size: 1.05rem;
}

.footer-column a:hover {
    opacity: 1;
    padding-left: 4px;
}

.footer-bottom {
    text-align: center;
    padding-top: 36px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
    font-size: 0.95rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        box-shadow: var(--shadow);
    }

    .nav-menu.active {
        display: flex;
    }

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

    .hero {
        padding: 140px 0 80px;
    }

    .hero-title {
        font-size: 2.75rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section {
        padding: 72px 0;
    }

    .section-title {
        font-size: 2.25rem;
    }

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

    .feature-grid {
        grid-template-columns: 1fr;
    }

    .driver-item {
        flex-direction: column;
        gap: 16px;
        padding: 28px;
    }

    .driver-number {
        min-width: auto;
    }

    .founder-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .founder-image {
        max-width: 400px;
        margin: 0 auto;
    }

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

    .footer-links {
        flex-direction: column;
        gap: 36px;
    }

    .patent-viewer {
        height: 600px;
    }

    .contact-info {
        padding: 40px 28px;
    }

    .strategic-section {
        padding: 48px 32px;
    }

    .feedback-cta {
        padding: 48px 32px;
    }

    .comparison-section {
        padding: 48px 32px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section {
        padding: 56px 0;
    }

    .section-title {
        font-size: 1.9rem;
    }

    .contact-info {
        padding: 32px 24px;
    }

    .strategic-section {
        padding: 36px 24px;
    }

    .feedback-cta {
        padding: 40px 24px;
    }

    .comparison-section {
        padding: 40px 24px;
    }

    .patent-info {
        padding: 32px 24px;
    }
}

/* Smooth Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.problem-card,
.tech-card,
.segment-card,
.milestone-card {
    animation: fadeIn 0.6s ease-out;
}

/* Smooth scrolling enhancement */
@media (prefers-reduced-motion: no-preference) {
    * {
        scroll-behavior: smooth;
    }
}