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

/* 기본 설정 */
body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

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

/* 헤더 */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: center;
    align-items: center;
}

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

.logo i {
    font-size: 2rem;
    color: #fff;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0;
}

.logo .subtitle {
    font-size: 1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* 히어로 섹션 */
.hero {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 4rem 0;
    text-align: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #2c3e50;
}

.hero-description {
    font-size: 1.2rem;
    color: #5a6c7d;
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.download-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-android {
    background: linear-gradient(135deg, #4CAF50, #45a049);
    color: white;
}

.btn-ios {
    background: linear-gradient(135deg, #007AFF, #0056b3);
    color: white;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

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

.phone-mockup {
    width: 200px;
    height: 400px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.phone-mockup i {
    font-size: 4rem;
    color: white;
    opacity: 0.8;
}

/* 기능 섹션 */
.features {
    padding: 5rem 0;
    background-color: #ffffff;
}

.section-title {
    text-align: center;
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #2c3e50;
}

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

.feature-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.feature-icon i {
    font-size: 2rem;
    color: white;
}

.feature-card h4 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.feature-card p {
    color: #5a6c7d;
    line-height: 1.6;
}

/* 지원 섹션 */
.support {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.support-description {
    text-align: center;
    font-size: 1.2rem;
    color: #5a6c7d;
    margin-bottom: 3rem;
    line-height: 1.8;
}

.support-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.support-link {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    background: white;
    border-radius: 15px;
    text-decoration: none;
    color: #333;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.support-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.12);
}

.support-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
}

.support-icon i {
    font-size: 1.5rem;
    color: white;
}

.support-info {
    flex: 1;
}

.support-info h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.support-info p {
    color: #5a6c7d;
    font-size: 0.95rem;
}

.support-link .fa-external-link-alt {
    color: #667eea;
    font-size: 1.2rem;
}

/* 푸터 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 3rem 0;
    text-align: center;
}

.footer-logo {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-bottom: 1rem;
    font-size: 1.3rem;
    font-weight: 600;
}

.footer-logo i {
    font-size: 1.5rem;
}

.footer-text {
    color: #bdc3c7;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.footer-links a {
    color: #ecf0f1;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #667eea;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

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

    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

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

    .support-link {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }

    .logo {
        flex-direction: column;
        gap: 5px;
    }

    .logo h1 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 3rem 0;
    }

    .hero-title {
        font-size: 1.8rem;
    }

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

    .features {
        padding: 3rem 0;
    }

    .support {
        padding: 3rem 0;
    }

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

    .feature-card {
        padding: 2rem 1.5rem;
    }

    .support-links {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .support-link {
        padding: 1.5rem;
    }
}