/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0066cc;
    --secondary-color: #004c99;
    --accent-color: #00a3e0;
    --text-dark: #2c3e50;
    --text-light: #5a6c7d;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e0e6ed;
    --success-color: #28a745;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 5px 20px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Malgun Gothic', 'Apple SD Gothic Neo', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background-color: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    font-weight: 700;
}

.nav-brand .subtitle {
    font-size: 0.85rem;
    color: var(--text-light);
    display: block;
    margin-top: -5px;
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

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

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    margin: 3px 0;
    transition: 0.3s;
}

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

.hero-title {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: #0088c7;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background-color: var(--bg-light);
    transform: translateY(-2px);
}

/* Sections */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.2rem;
    color: var(--text-light);
}

.section-header.light h2,
.section-header.light p {
    color: white;
}

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

.bg-dark {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
    color: white;
}

/* Grid Layouts */
.grid {
    display: grid;
    gap: 2rem;
}

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

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Cards */
.card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

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

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.card p {
    color: var(--text-light);
}

/* Feature Box */
.feature-box {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.feature-box h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.feature-box ul {
    list-style: none;
}

.feature-box ul li {
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-dark);
}

.feature-box ul li:last-child {
    border-bottom: none;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-light);
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    color: white;
    text-align: center;
    padding: 80px 20px;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.8rem;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.95;
}

/* Company Info */
.company-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.info-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
}

.info-card h3 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 0.8rem;
}

.info-card p {
    color: var(--text-dark);
    font-size: 1.1rem;
}

/* Location Cards */
.location-card {
    background: white;
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.location-card h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.location-title {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.location-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Team Section */
.team-grid {
    display: grid;
    gap: 3rem;
}

.team-member {
    background: white;
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    display: grid;
    grid-template-columns: 177px 1fr;
    gap: 2rem;
    align-items: start;
}

.member-photo {
    width: 177px;
    height: 236px;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.member-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.member-content {
    flex: 1;
}

.member-header {
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 1rem;
    margin-bottom: 2rem;
}

.member-header h3 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.member-title {
    font-size: 1.2rem;
    color: var(--primary-color);
    font-weight: 600;
}

.member-bio h4 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin: 1.5rem 0 1rem;
}

.member-bio ul {
    list-style: none;
}

.member-bio ul li {
    padding: 0.8rem 0;
    color: var(--text-dark);
    line-height: 1.8;
}

.member-bio .detail {
    font-size: 0.95rem;
    color: var(--text-light);
    display: block;
    margin-top: 0.3rem;
    margin-left: 1rem;
}

/* Advisor Section */
.advisor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.advisor-card {
    background: white;
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.advisor-header {
    border-bottom: 3px solid var(--accent-color);
    padding-bottom: 1rem;
    margin-bottom: 2rem;
}

.advisor-header h3 {
    font-size: 1.8rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.advisor-header p {
    color: var(--text-light);
    line-height: 1.6;
}

.advisor-bio h4 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin: 1.5rem 0 1rem;
}

.advisor-bio ul {
    list-style: none;
}

.advisor-bio ul li {
    padding: 0.5rem 0;
    color: var(--text-dark);
    line-height: 1.8;
}

.advisor-photo {
    width: 177px;
    height: 236px;
    margin: 0 auto 20px;
    border-radius: 8px;
    overflow: hidden;
}

.advisor-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Technology Page */
.tech-description {
    max-width: 900px;
    margin: 0 auto;
}

.lead {
    font-size: 1.3rem;
    color: var(--text-dark);
    text-align: center;
    margin-bottom: 3rem;
    line-height: 1.8;
}

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

.tech-feature {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
}

.tech-feature h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.tech-feature p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Mechanism Cards */
.mechanism-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.mechanism-card {
    background: white;
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    border-top: 5px solid var(--primary-color);
}

.mechanism-card.secondary {
    border-top-color: var(--accent-color);
}

.mechanism-card h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.mechanism-card ul {
    list-style: none;
}

.mechanism-card ul li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.mechanism-card ul li:last-child {
    border-bottom: none;
}

.mechanism-card ul li strong {
    display: block;
    color: var(--text-dark);
    margin-bottom: 0.3rem;
}

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
}

.result-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s ease;
}

.result-card:hover {
    transform: translateY(-5px);
}

.result-percentage {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.result-card h4 {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin-bottom: 0.8rem;
}

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

/* CKD Info */
.ckd-info {
    display: grid;
    gap: 2rem;
}

.info-box {
    background: white;
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    border-left: 5px solid var(--accent-color);
}

.info-box h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.info-box p {
    color: var(--text-dark);
    line-height: 1.8;
}

.info-box ul {
    list-style: none;
}

.info-box ul li {
    padding: 0.8rem 0;
    color: var(--text-dark);
    line-height: 1.8;
}

.info-box ul li strong {
    color: var(--primary-color);
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.product-card {
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.product-header {
    background: var(--primary-color);
    color: white;
    padding: 2rem;
}

.product-header h3 {
    font-size: 1.8rem;
}

.product-features {
    padding: 2rem;
}

.product-features ul {
    list-style: none;
}

.product-features ul li {
    padding: 0.8rem 0;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border-color);
}

.product-features ul li:last-child {
    border-bottom: none;
}

.product-target {
    background: var(--bg-light);
    padding: 1.5rem 2rem;
    color: var(--text-dark);
}

/* Platform Section */
.platform-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.platform-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

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

.platform-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

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

.platform-item ul li {
    padding: 0.5rem 0;
    opacity: 0.9;
}

.platform-description {
    text-align: center;
    font-size: 1.2rem;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
}

/* Contact Page */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
}

.contact-info {
    background: white;
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.contact-info h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.info-group {
    margin-bottom: 2rem;
}

.info-group h3 {
    font-size: 1.2rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.info-group p {
    color: var(--text-light);
    line-height: 1.8;
}

.contact-cta {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.contact-cta p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Contact Form */
.contact-form-section {
    background: white;
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.contact-form-section h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 5px;
    display: none;
}

.form-message.success {
    background-color: #d4edda;
    color: #155724;
    display: block;
}

.form-message.error {
    background-color: #f8d7da;
    color: #721c24;
    display: block;
}

/* Office Grid */
.office-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.office-card {
    background: white;
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.office-card h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.office-label {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.office-address {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.office-status {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--success-color);
    color: white;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.office-status.upcoming {
    background-color: var(--accent-color);
}

/* Footer */
footer {
    background-color: var(--text-dark);
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: white;
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow);
    }

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

    .hero-title {
        font-size: 2rem;
    }

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

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

    .section-header h2 {
        font-size: 2rem;
    }

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .contact-grid,
    .advisor-grid,
    .mechanism-grid,
    .product-grid,
    .office-grid {
        grid-template-columns: 1fr;
    }

    .team-member {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .member-photo {
        margin: 0 auto;
    }

    .page-header h1 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 60px 0;
    }

    .section {
        padding: 40px 0;
    }

    .stat-number {
        font-size: 2rem;
    }
}