/* index.css - 전역 디자인 시스템 */
@import url('https://fonts.googleapis.com/css2?family=Pretendard:wght@300;400;500;600;700&display=swap');

:root {
    --bg-color: #0d0f1a; /* 깊은 우주 같은 다크 블루 배경 */
    --text-primary: #ffffff;
    --text-secondary: #a0aab2;
    --accent-color: #00f0ff; /* 네온 사이언 포인트 */
    --accent-hover: #0080ff; /* 딥 블루 호버 */
    --danger-color: #ff3366; /* 네온 핑크 거부/에러 */
    
    /* 글래스모피즘 표면 색상 */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --glass-blur: blur(12px);
    
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Pretendard', -apple-system, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* 스크롤바 커스텀 */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-color);
}
::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}

/* 공통 유틸리티 클래스 */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--glass-shadow);
}

.gradient-text {
    background: linear-gradient(90deg, var(--accent-color) 0%, #a855f7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-color);
    color: #000;
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
}

.btn-primary:hover {
    background: #fff;
    box-shadow: 0 0 25px rgba(0, 240, 255, 0.8);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-outline:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* 네비게이션바 (글래스모피즘) */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(13, 15, 26, 0.7);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    text-decoration: none;
    color: var(--text-primary);
}

/* 폼 입력 요소 글로벌 스타일 */
.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(0, 240, 255, 0.2);
}

/* 히어로 섹션 (상단 배경) */
.hero {
    position: relative;
    min-height: 45vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 110px 1.5rem 2.5rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -2;
    transition: transform 10s ease;
}

.hero:hover .hero-bg {
    transform: scale(1.05);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(13, 15, 26, 0.4) 0%, var(--bg-color) 100%);
    z-index: -1;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 850px;
    margin: 0 auto;
    width: 100%;
}

.hero-content h1 {
    font-size: clamp(2rem, 5vw + 1rem, 3.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
    line-height: 1.3;
    word-break: keep-all;
    overflow-wrap: break-word;
}

.hero-content p {
    font-size: clamp(1rem, 1.5vw + 0.5rem, 1.2rem);
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto;
    line-height: 1.7;
    word-break: keep-all;
    overflow-wrap: break-word;
}

/* 앱 리스트 (그리드) */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem 4rem;
    flex: 1;
    width: 100%;
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 1rem;
    position: relative;
    z-index: 10;
}

/* 앱 카드 요소 */
.app-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    height: 100%;
}

.app-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
    border-color: rgba(0, 240, 255, 0.3);
}

.card-img-wrap {
    width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
}

.card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.app-card:hover .card-img {
    transform: scale(1.1);
}

.card-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.card-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 1rem;
    flex: 1;
    /* 3줄 말줄임표 */
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 팝업 모달 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    width: 90%;
    max-width: 400px;
    padding: 2rem;
    text-align: center;
    transform: translateY(20px);
    transition: var(--transition);
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}

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

/* ==========================================================================
   모바일 및 반응형 미디어 쿼리 (Responsive Media Queries)
   ========================================================================== */
@media (max-width: 768px) {
    nav {
        padding: 0.75rem 1rem;
    }

    .logo {
        font-size: 1.15rem;
    }

    .nav-links .btn {
        padding: 8px 12px;
        font-size: 0.85rem;
    }

    .container {
        padding: 1rem 1rem 3rem;
    }

    .hero {
        padding: 90px 1rem 2rem;
        min-height: auto;
    }

    .hero-content h1 {
        font-size: 1.85rem;
        margin-bottom: 0.75rem;
    }

    .hero-content p {
        font-size: 0.95rem;
        line-height: 1.6;
    }

    .app-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
        margin-top: 0.75rem;
    }

    .card-img-wrap {
        height: 180px;
    }

    .card-content {
        padding: 1.25rem;
    }

    .card-title {
        font-size: 1.2rem;
    }

    .card-desc {
        font-size: 0.9rem;
    }

    /* 서브화면 상세페이지 반응형 */
    .detail-hero {
        padding-top: 85px !important;
        padding-bottom: 1.5rem !important;
        min-height: auto !important;
        height: auto !important;
    }

    .detail-hero-title {
        font-size: 1.7rem !important;
    }

    .detail-content {
        padding: 1.25rem !important;
        margin-top: 0.5rem !important;
    }

    .huge-btn {
        font-size: 1rem !important;
        padding: 14px 10px !important;
        min-width: 100% !important;
    }
}