/* ========== 기본 설정 ========== */
:root {
    --primary-color: #FF6B6B;
    --primary-dark: #e55555;
    --secondary-color: #4ECDC4;
    --background-color: #f8f9fa;
    --card-background: #ffffff;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-muted: #999999;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 20px rgba(0,0,0,0.15);
}

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

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* ========== 컨테이너 ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ========== 헤더 ========== */
.header {
    background: white;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-color);
}

.main-nav {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.2s;
}

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

.header-actions {
    display: flex;
    gap: 12px;
}

/* ========== 버튼 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-outline {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-large {
    padding: 16px 36px;
    font-size: 16px;
    border-radius: 12px;
}

.btn-icon {
    font-size: 20px;
}

/* ========== 히어로 섹션 ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 40px 80px;
    background: linear-gradient(135deg, #fff5f5 0%, #fff 50%, #f0fffe 100%);
}

.hero-content {
    flex: 1;
    max-width: 600px;
    padding-left: 80px;
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    width: 280px;
    height: 560px;
    background: #1a1a1a;
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-lg);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 32px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.phone-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ========== 섹션 공통 ========== */
.section {
    padding: 100px 40px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 60px;
}

/* ========== 서비스 소개 섹션 ========== */
.about-section {
    background: white;
}

.about-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.about-card {
    background: var(--background-color);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.about-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.about-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.about-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========== 주요 기능 섹션 ========== */
.features-section {
    background: var(--background-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.feature-item {
    background: white;
    padding: 30px;
    border-radius: 16px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 40px;
    flex-shrink: 0;
}

.feature-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.feature-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========== 다운로드 섹션 ========== */
.download-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, #ff8e8e 100%);
    color: white;
    text-align: center;
}

.download-section .section-title {
    color: white;
}

.download-section .section-subtitle {
    color: rgba(255,255,255,0.9);
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
}

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

.download-section .btn-primary:hover {
    background: #f0f0f0;
}

.download-note {
    font-size: 14px;
    color: rgba(255,255,255,0.8);
}

/* ========== 푸터 ========== */
.footer {
    background: #2a2a2a;
    color: white;
    padding: 60px 40px 40px;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 30px;
}

.footer-brand .logo-text {
    color: white;
}

.footer-info {
    padding: 30px 0;
    border-top: 1px solid rgba(255,255,255,0.1);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 30px;
}

.business-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
}

.business-info-item {
    display: flex;
    gap: 8px;
    font-size: 14px;
    color: rgba(255,255,255,0.7);
}

.business-info-item .label {
    color: rgba(255,255,255,0.5);
    min-width: 120px;
}

.business-info-item .value {
    color: rgba(255,255,255,0.9);
}

.footer-copyright {
    text-align: center;
}

.footer-copyright p {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}

/* ========== 반응형 ========== */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 100px;
    }

    .hero-content {
        margin-bottom: 40px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .about-cards {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
    }
}

@media (max-width: 768px) {
    .header-inner {
        padding: 0 20px;
    }

    .main-nav {
        display: none;
    }

    .hero {
        padding: 100px 20px 60px;
    }

    .hero-title {
        font-size: 32px;
    }

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

    .phone-mockup {
        width: 220px;
        height: 440px;
    }

    .section {
        padding: 60px 20px;
    }

    .section-title {
        font-size: 28px;
    }

    .business-info-grid {
        grid-template-columns: 1fr;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
}