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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f8f9fa;
    overflow-x: hidden;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

/* 네비게이션 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.logo-text {
    font-size: 28px;
    background: linear-gradient(135deg, #40E0D0, #1ABC9C);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    cursor: pointer;
}

/* 로고 애니메이션 */
.logo-part-api,
.logo-part-oa,
.logo-part-sis {
    display: inline-block;
    vertical-align: bottom;
}

.logo-part-oa {
    width: 0;
    opacity: 0;
    overflow: hidden;
    transition: width 0.5s ease-in-out, opacity 0.5s ease-in-out;
}

.logo-text:hover .logo-part-oa {
    width: 1.2em;
    opacity: 1;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-links a {
    color: #333;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-links a:hover {
    color: #40E0D0;
}

.btn-login {
    background: linear-gradient(135deg, #40E0D0, #1ABC9C);
    color: white !important;
    padding: 10px 24px;
    border-radius: 12px;
    font-weight: 600;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(64, 224, 208, 0.4);
}

/* 히어로 섹션 */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 100px 30px 60px;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.hero-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
    opacity: 0.15;
}

.desert-animation {
    position: absolute;
    width: 100%;
    height: 100%;
    animation: float 20s ease-in-out infinite;
    filter: brightness(1.2);
}

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

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-logo {
    width: 120px;
    height: 120px;
    margin-bottom: 30px;
    animation: fadeInDown 1s ease;
}

.hero-title {
    font-size: 72px;
    font-weight: 800;
    color: white;
    margin-bottom: 20px;
    animation: fadeInDown 1s ease 0.2s backwards;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 28px;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 10px;
    animation: fadeInDown 1s ease 0.4s backwards;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-tagline {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    font-style: italic;
    margin-bottom: 30px;
    animation: fadeInDown 1s ease 0.6s backwards;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-description {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
    margin-bottom: 40px;
    animation: fadeInUp 1s ease 0.8s backwards;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeInUp 1s ease 1s backwards;
}

.btn-primary {
    background: white;
    color: #667eea;
    padding: 16px 40px;
    border-radius: 16px;
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.btn-secondary {
    background: transparent;
    color: white;
    padding: 16px 40px;
    border-radius: 16px;
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    border: 2px solid white;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: white;
    color: #667eea;
    transform: translateY(-3px);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.8);
    animation: fadeIn 1s ease 1.5s backwards;
}

.scroll-arrow {
    font-size: 24px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(10px); }
}

/* 섹션 공통 스타일 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 30px;
}

.section-title {
    font-size: 48px;
    font-weight: 800;
    color: #333;
    text-align: center;
    margin-bottom: 20px;
}

.section-subtitle {
    font-size: 20px;
    color: #666;
    text-align: center;
    margin-bottom: 60px;
}

/* 기능 섹션 */
.features-section {
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
    border-color: #40E0D0;
}

.feature-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 24px;
    color: #333;
    margin-bottom: 15px;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* 통계 섹션 */
.stats-section {
    background: linear-gradient(135deg, #40E0D0, #1ABC9C);
    color: white;
}

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

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.stat-card {
    text-align: center;
    padding: 40px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.stat-number {
    font-size: 64px;
    font-weight: 800;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 18px;
    opacity: 0.9;
}

/* API 섹션 */
.apis-section {
    background: #f8f9fa;
}

.apis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.api-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.api-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

.api-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.api-card h3 {
    font-size: 24px;
    color: #333;
    margin-bottom: 15px;
}

.api-card p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.api-status {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, #40E0D0, #1ABC9C);
    color: white;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

/* 가격 섹션 */
.pricing-section {
    background: white;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    border: 2px solid #e0e0e0;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
    border-color: #40E0D0;
}

.pricing-card.featured {
    border-color: #40E0D0;
    transform: scale(1.05);
    box-shadow: 0 20px 50px rgba(64, 224, 208, 0.2);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #40E0D0, #1ABC9C);
    color: white;
    padding: 8px 24px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 28px;
    color: #333;
    margin-bottom: 20px;
}

.price {
    margin-bottom: 30px;
}

.price-amount {
    font-size: 48px;
    font-weight: 800;
    color: #40E0D0;
}

.price-period {
    font-size: 18px;
    color: #666;
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
    text-align: left;
}

.pricing-features li {
    padding: 12px 0;
    color: #666;
    border-bottom: 1px solid #f0f0f0;
}

.btn-pricing {
    display: inline-block;
    background: linear-gradient(135deg, #40E0D0, #1ABC9C);
    color: white;
    padding: 14px 40px;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-pricing:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(64, 224, 208, 0.4);
}

/* CTA 섹션 */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.cta-content {
    text-align: center;
    padding: 60px 30px;
}

.cta-content h2 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    color: white;
}

.cta-content p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.btn-cta {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 18px 50px;
    border-radius: 16px;
    font-size: 20px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.btn-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

/* 푸터 */
.footer {
    background: #1a1a2e;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.footer-logo-img {
    width: 60px;
    height: 60px;
}

.footer-logo h3 {
    font-size: 32px;
    background: linear-gradient(135deg, #40E0D0, #1ABC9C);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.footer-logo p {
    color: #999;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    margin-bottom: 20px;
    color: #40E0D0;
}

.footer-column a {
    display: block;
    color: #999;
    text-decoration: none;
    margin-bottom: 12px;
    transition: all 0.3s ease;
}

.footer-column a:hover {
    color: #40E0D0;
    transform: translateX(5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #333;
    color: #999;
}

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

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

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

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

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

/* 텍스트 선택 가능한 요소들 */
.feature-card p,
.api-card p,
.pricing-features li,
.hero-description,
.cta-content p,
.section-subtitle {
    user-select: text;
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
}

/* 반응형 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-title {
        font-size: 48px;
    }

    .section-title {
        font-size: 36px;
    }

    .features-grid,
    .stats-grid,
    .apis-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }

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

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