/* 폰트 및 기본 스타일 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;700&display=swap');

* {
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

/* 스크롤 부드럽게 */
html {
    scroll-behavior: smooth;
}

/* 애니메이션 */
.section-fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* 호버 효과 개선 */
.hover-scale {
    transition: transform 0.2s ease-in-out;
}

.hover-scale:hover {
    transform: scale(1.02);
}

/* 버튼 애니메이션 */
.btn-primary {
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px 0 rgba(79, 70, 229, 0.39);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.6);
}

/* 카드 호버 효과 */
.feature-card {
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* 모바일 메뉴 애니메이션 */
.mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.mobile-menu.show {
    max-height: 300px;
}

/* 통계 애니메이션 */
.stat-number {
    animation: countUp 2s ease-out;
}

@keyframes countUp {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 접근성 개선 */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: #000;
    color: #fff;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
    border-radius: 4px;
}

.skip-link:focus {
    top: 6px;
}

/* 포커스 표시 개선 */
button:focus,
a:focus {
    outline: 2px solid #4f46e5;
    outline-offset: 2px;
}

/* 이미지 반응형 */
.responsive-image {
    width: 100%;
    height: auto;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.responsive-image:hover {
    transform: scale(1.05);
}

/* 로딩 애니메이션 */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-radius: 50%;
    border-top: 2px solid #3498db;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 다크 모드 지원 준비 */
@media (prefers-color-scheme: dark) {
    /* 다크 모드 스타일은 필요시 추가 */
}

/* 모션 감소 선호시 애니메이션 비활성화 */
@media (prefers-reduced-motion: reduce) {
    .section-fade-in,
    .hover-scale,
    .btn-primary,
    .feature-card,
    .mobile-menu,
    .responsive-image {
        transition: none;
        animation: none;
    }
}