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

:root {
    --primary: #2563EB;
    --primary-light: #3B82F6;
    --accent: #F97316;
    --bg-light: #F8FAFC;
    --bg-white: #FFFFFF;
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --border: #E2E8F0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 헤더 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.header-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 24px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 15px;
    transition: color 0.2s;
}

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

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

.mobile-menu-btn span {
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
}

/* 섹션 공통 */
.section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 120px 24px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 48px;
}

/* 홈 섹션 */
.hero {
    background: var(--bg-light);
    text-align: center;
    position: relative;
}

.hero-content {
    max-width: 600px;
    margin: 0 auto;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

.btn-primary {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: background 0.2s, transform 0.2s;
}

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

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0.4;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--text-secondary);
    border-bottom: 2px solid var(--text-secondary);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* 회사소개 섹션 */
.about {
    background: var(--bg-white);
}

.about-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.about-description {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 48px;
}

.about-series {
    display: flex;
    justify-content: center;
    gap: 24px;
}

.series-item {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg-light);
    padding: 16px 28px;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.series-icon {
    font-size: 24px;
}

.series-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

/* 앱소개 섹션 */
.apps {
    background: var(--bg-light);
    padding-bottom: 100px;
}

.app-series {
    margin-bottom: 64px;
}

.series-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 8px;
}

.series-quote {
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 32px;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.app-logo-placeholder {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    margin: 0 auto 16px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.app-card {
    background: var(--bg-white);
    padding: 32px 24px;
    border-radius: 16px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--border);
    position: relative;
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.app-logo {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.app-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.app-tagline {
    font-size: 13px;
    color: var(--text-secondary);
}

.app-arrow {
    position: absolute;
    bottom: 16px;
    right: 20px;
    font-size: 16px;
    color: var(--primary);
    opacity: 0;
    transition: opacity 0.2s;
}

.app-card:hover .app-arrow {
    opacity: 1;
}

/* 모달 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    padding: 24px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-white);
    border-radius: 16px;
    max-width: 480px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
}

@keyframes modalSlideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal.active .modal-content {
    animation: modalSlideUp 0.2s ease;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 24px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    z-index: 10;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: background 0.2s;
}

.modal-close:hover {
    background: var(--bg-light);
    color: var(--text-primary);
}

.modal-header {
    text-align: center;
    padding: 40px 24px 24px;
}

.modal-logo {
    width: 96px;
    height: 96px;
    border-radius: 24px;
    margin-bottom: 16px;
}

.modal-logo-placeholder {
    width: 96px;
    height: 96px;
    border-radius: 24px;
    margin: 0 auto 16px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
}

.modal-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.modal-tagline {
    font-size: 14px;
    color: var(--text-secondary);
}

.modal-body {
    padding: 0 24px 32px;
}

.modal-features {
    margin-bottom: 24px;
}

.modal-features h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

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

.modal-features li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
    font-size: 14px;
}

.modal-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 600;
}

.modal-download {
    text-align: center;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--text-primary);
    color: #fff;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: background 0.2s;
}

.btn-download:hover {
    background: #000;
}

.btn-download svg {
    width: 20px;
    height: 20px;
}

.coming-soon-badge {
    display: inline-block;
    background: var(--bg-light);
    color: var(--text-secondary);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    border: 1px solid var(--border);
}

.privacy-link {
    display: block;
    margin-top: 16px;
    color: var(--text-secondary);
    font-size: 13px;
    text-decoration: none;
}

.privacy-link:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* 연락처 섹션 */
.contact {
    background: var(--bg-white);
}

.contact-content {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--bg-light);
    padding: 20px 28px;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.contact-icon {
    font-size: 28px;
}

.contact-info h4 {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 2px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-info a {
    font-size: 15px;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
}

.contact-info a:hover {
    color: var(--primary);
}

/* 푸터 */
.footer {
    background: var(--text-primary);
    color: rgba(255, 255, 255, 0.7);
    padding: 32px 24px;
    text-align: center;
    font-size: 14px;
}

/* 반응형 */
@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--border);
        gap: 0;
    }

    .nav.active {
        display: flex;
    }

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

    .nav-link:last-child {
        border-bottom: none;
    }

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

    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section {
        padding: 80px 20px;
    }

    .section-title {
        font-size: 26px;
        margin-bottom: 32px;
    }

    .apps-grid {
        grid-template-columns: 1fr;
        max-width: 320px;
    }

    .about-series {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .series-item {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .contact-content {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    .contact-item {
        width: 100%;
        max-width: 320px;
    }
}

/* 언어 선택 버튼 */
.lang-switcher {
    display: flex;
    gap: 5px;
    margin-left: 20px;
}

.lang-btn {
    background: transparent;
    border: 2px solid transparent;
    border-radius: 8px;
    padding: 5px 8px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.2s;
}

.lang-btn:hover {
    background: rgba(0, 0, 0, 0.05);
}

.lang-btn.active {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
}

@media (max-width: 768px) {
    .lang-switcher {
        position: absolute;
        right: 60px;
        top: 50%;
        transform: translateY(-50%);
    }
    
    .lang-btn {
        padding: 3px 5px;
        font-size: 1rem;
    }
}