@charset "utf-8";

/* ==========================================================================
   CSS Variables & Reset
   ========================================================================== */
:root {
    --primary: #3DAEE9;
    /* 스크린샷 이미지 우측 상단의 깔끔한 파스텔 블루 */
    --primary-dark: #2980B9;
    /* 텍스트/강조 딥 블루 */
    --primary-light: #D6EAF8;
    /* 배경/뱃지용 라이트 블루 */
    --bg-main: #FFFFFF;
    --bg-alt: #F8F9FA;
    --text-dark: #1A1A1A;
    --text-muted: #666666;
    --border-color: #EAEAEA;
    --font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --nav-height: 70px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--text-dark);
    background-color: var(--bg-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ==========================================================================
   Typography & Utils
   ========================================================================== */
.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.shadow-md {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.shadow-lg {
    box-shadow: 0 20px 40px rgba(0, 200, 83, 0.15);
}

.container {
    width: 100%;
    max-width: 1560px;
    margin: 0 auto;
    padding: 0 3%;
}

/* 다음 섹션 살짝 보이기 기법 (여백을 줄이고 padding으로 콘텐츠 분리) */
.section {
    padding: 10vh 0;
    position: relative;
}

.peek-next {
    /* 100vh가 아닌 85~90vh를 차지하게 하여 다음 엘리먼트가 화면 하단에 걸치도록 함 */
    min-height: 85vh;
    display: flex;
    align-items: center;
}

.alt-bg {
    background-color: var(--bg-alt);
}

/* ==========================================================================
   Navigation (Glassmorphism)
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1560px;
    margin: 0 auto;
    padding: 0 3%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    text-decoration: none;
    display: flex;
    align-items: center;
    transition: transform 0.2s;
}

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

.logo-mark {
    color: #E72027;
    /* 이미지 속 MARK 빨간색 */
}

.logo-mon {
    color: #0E99DC;
    /* 이미지 속 MON 파란색 */
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}

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

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn-primary-small,
.btn-primary,
.btn-secondary,
.btn-large {
    display: inline-block;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
}

.btn-primary-small {
    background-color: var(--primary);
    color: #fff !important;
    padding: 0.5rem 1.25rem;
}

.btn-primary-small:hover {
    background-color: var(--primary-dark);
    box-shadow: 0 4px 12px rgba(0, 200, 83, 0.3);
}

.btn-primary {
    background-color: var(--primary);
    color: #fff;
    padding: 0.8rem 2rem;
    font-size: 1.05rem;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 200, 83, 0.3);
}

.btn-secondary {
    background-color: #fff;
    color: var(--text-dark);
    border: 1px solid var(--border-color);
    padding: 0.8rem 2rem;
    font-size: 1.05rem;
}

.btn-secondary:hover {
    background-color: var(--bg-alt);
    transform: translateY(-2px);
}

.btn-large {
    background-color: var(--primary);
    color: #fff;
    padding: 1.2rem 3rem;
    font-size: 1.2rem;
    border-radius: 12px;
}

.btn-large:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 200, 83, 0.4);
}

/* ==========================================================================
   Intro Section
   ========================================================================== */
.intro-section {
    padding-top: calc(var(--nav-height) + 8vh);
    padding-bottom: 5rem;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(180deg, var(--bg-main) 0%, var(--bg-alt) 100%);
}

.intro-logo-wrapper {
    max-width: 450px;
    width: 100%;
    aspect-ratio: 1.1 / 1;
    border-radius: 24px;
    margin-bottom: 2.5rem;
    background-color: #fbfbfa;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-left: auto;
    margin-right: auto;
}

.intro-logo {
    width: 135%;
    height: auto;
    mix-blend-mode: multiply;
}

.intro-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -1px;
    margin-bottom: 1.2rem;
}

.intro-desc {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 650px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    padding-top: 5vh;
    padding-bottom: 10rem;
    position: relative;
    overflow: hidden;
}

.hero-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.badge {
    display: inline-block;
    background-color: var(--primary-light);
    color: var(--primary-dark);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -1px;
    margin-bottom: 1.5rem;
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 4rem;
}

.hero-image {
    position: relative;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    z-index: 10;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.floating-card {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: #fff;
    padding: 1rem 1.5rem;
    border-radius: 10px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    color: var(--primary-dark);
    animation: floating 3s ease-in-out infinite;
}

/* 마우스 스크롤 인디케이터 */
.scroll-indicator {
    position: absolute;
    bottom: 2vh;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0.6;
    animation: fadePulse 2s infinite;
}

.scroll-indicator span {
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.mouse {
    width: 24px;
    height: 36px;
    border: 2px solid var(--text-dark);
    border-radius: 15px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 6px;
    background: var(--text-dark);
    border-radius: 2px;
    animation: scrollWheel 1.5s infinite;
}

/* ==========================================================================
   Features Section (Split Layout)
   ========================================================================== */
.split-layout {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 5%;
}

.reverse .split-layout {
    flex-direction: row-reverse;
}

.feature-text {
    flex: 1;
    max-width: 600px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1.5rem;
    letter-spacing: -0.5px;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

/* 폰트 확대 유틸리티 */
h2.section-title.text-lg {
    font-size: 2.8rem;
    line-height: 1.35;
}

p.section-desc.text-lg {
    font-size: 1.35rem;
    line-height: 1.7;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 800;
}

.feature-image {
    flex: 1.4;
    position: relative;
}

.image-wrapper img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.image-grid {
    position: relative;
    padding-bottom: 3rem;
    padding-right: 3rem;
    /* 오른쪽 여백 확보 (서브 이미지용) */
}

.image-grid .main-img-layer {
    position: relative;
    z-index: 1;
    border-radius: 12px;
}

.image-grid .crossfade-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5;
    border-radius: 12px;
}

.crossfade-animation {
    animation: crossfadeToggle 4s infinite;
    /* 2초 간격 교차 (총 4초) */
}

@keyframes crossfadeToggle {

    0%,
    45% {
        opacity: 0;
        /* 처음 2초간 19번 투명 -> 17번 보임 */
    }

    50%,
    95% {
        opacity: 1;
        /* 다음 2초간 19번 보임 -> 17번 가려짐 */
    }

    100% {
        opacity: 0;
    }
}

/* ==========================================================================
   Video Wrapper
   ========================================================================== */
.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    /* 16:9 Aspect Ratio for YouTube */
    height: 0;
    overflow: hidden;
    border-radius: 12px;
    background: #000;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* ==========================================================================
   CTA Section
   ========================================================================== */
.cta {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    text-align: center;
    padding: 12vh 0;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.cta-desc {
    font-size: 1.15rem;
    opacity: 0.9;
    margin-bottom: 3rem;
}

.cta-button-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.cta-button-wrapper .btn-large {
    background-color: #fff;
    color: var(--primary-dark);
}

.cta-button-wrapper .btn-large:hover {
    background-color: #f0f0f0;
}

.version-info {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* ==========================================================================
   System Requirements Table
   ========================================================================== */
.system-req-wrapper {
    margin-top: 4rem;
    width: 100%;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    background: #fff;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    overflow-x: auto;
    /* 반응형 가로 스크롤 */
}

.system-req-table {
    width: 100%;
    border-collapse: collapse;
    text-align: center;
    color: var(--text-dark);
}

.system-req-table th,
.system-req-table td {
    padding: 1.2rem 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.system-req-table th {
    background-color: var(--primary-light);
    color: var(--primary-dark);
    font-weight: 700;
    border-bottom: 2px solid var(--primary);
    border-radius: 8px 8px 0 0;
}

.system-req-table th.recommended {
    background-color: var(--primary);
    color: #fff;
}

.system-req-table tbody tr:last-child td {
    border-bottom: none;
}

.system-req-table tbody td:first-child {
    font-weight: 700;
    color: var(--text-muted);
}

.system-req-table .table-note {
    font-size: 0.85rem;
    color: #999;
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
    background-color: #111;
    color: rgba(255, 255, 255, 0.6);
    padding: 4rem 0;
    text-align: center;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background-color: rgba(255, 255, 255, 0.9);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 12px;
    border-radius: 6px;
    text-decoration: none;
    transition: transform 0.2s;
}

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

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes floating {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

@keyframes fadePulse {

    0%,
    100% {
        opacity: 0.4;
    }

    50% {
        opacity: 1;
    }
}

@keyframes scrollWheel {
    0% {
        transform: translate(-50%, 0);
        opacity: 1;
    }

    100% {
        transform: translate(-50%, 10px);
        opacity: 0;
    }
}

/* Scroll Reveal Classes (JS Triggered) */
.fade-in-up,
.reveal-left,
.reveal-right,
.reveal-up,
.slide-up-delayed {
    opacity: 0;
}

.fade-in-up {
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left {
    transform: translateX(-40px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right {
    transform: translateX(40px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-up {
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-up-delayed {
    transform: translateY(50px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s;
}

.active.fade-in-up,
.active.reveal-left,
.active.reveal-right,
.active.reveal-up,
.active.slide-up-delayed {
    opacity: 1;
    transform: translate(0, 0);
}

/* ==========================================================================
   Image Slider
   ========================================================================== */
.slider-container {
    padding-bottom: 2rem;
}

.slider-wrapper {
    aspect-ratio: 16 / 9;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
    z-index: 1;
}

.slide-img.active-slide {
    opacity: 1;
    z-index: 2;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.8);
    color: var(--primary-dark);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 10;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.slider-btn:hover {
    background: #fff;
    color: var(--primary);
    transform: translateY(-50%) scale(1.1);
}

.prev-btn {
    left: 20px;
}

.next-btn {
    right: 20px;
}

.slider-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #ccc;
    cursor: pointer;
    transition: background-color 0.3s;
}

.dot.active-dot {
    background-color: var(--primary);
}

/* ==========================================================================
   List Info Box Overlay (Blacklist/Whitelist)
   ========================================================================== */
.list-image-container {
    position: relative;
}

.list-info-box {
    position: absolute;
    top: -20px;
    right: -20px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    z-index: 20;
    min-width: 280px;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.mt-2 {
    margin-top: 1rem;
}

.dot-icon {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 4px;
}

.dot-icon.black {
    background-color: #333;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
}

.dot-icon.white {
    background-color: #fff;
    border: 2px solid #ccc;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.05);
}

.info-text {
    display: flex;
    flex-direction: column;
}

.info-text strong {
    font-size: 1.05rem;
    color: var(--text-dark);
    line-height: 1.2;
    margin-bottom: 4px;
}

.info-text span {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.4;
}

@keyframes bounce-subtle {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-5px);
    }
}

.bounce-subtle {
    animation: bounce-subtle 4s ease-in-out infinite;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 768px) {
    /* 전역 컨테이너 조정 */
    .container {
        padding: 0 5%;
    }

    .section {
        padding: 6vh 0;
    }

    /* 히어로 섹션 최적화 */
    .hero {
        padding-top: 2vh;
        padding-bottom: 5rem;
    }

    .hero-title {
        font-size: 2.2rem;
        word-break: keep-all;
    }

    .hero-desc {
        font-size: 1rem;
        margin-bottom: 2rem;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
        gap: 0.8rem;
    }

    .hero-actions .btn-primary,
    .hero-actions .btn-secondary {
        width: 100%;
    }

    .hero-image {
        margin-top: 3rem;
    }

    .hero-image .image-wrapper {
        transform: scale(1) !important; /* 모바일에서 과도한 확대 제거 */
    }

    .floating-card {
        right: 0;
        bottom: -10px;
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }

    /* 특징 섹션 공통 */
    .split-layout {
        flex-direction: column !important;
        text-align: center;
        gap: 2rem;
    }

    .feature-text {
        max-width: 100%;
        margin-bottom: 1.5rem;
    }

    .section-title.text-lg {
        font-size: 1.8rem !important;
    }

    .section-desc.text-lg {
        font-size: 1.1rem !important;
    }

    .feature-image {
        width: 100%;
    }

    .feature-image .image-wrapper {
        transform: scale(1) !important; /* 모바일에서 뚫고 나가는 현상 방지 */
        margin: 0 auto !important;
    }

    /* 블랙리스트/화이트리스트 정보 박스 모바일 대응 */
    .list-info-box {
        position: relative !important;
        top: 0 !important;
        right: 0 !important;
        margin: 1.5rem auto 0 !important;
        min-width: 0 !important;
        width: 100%;
        text-align: left;
    }

    /* 이미지 그리드 (17번/19번 병합 뷰) 최적화 */
    .image-grid {
        transform: scale(1) translateX(0) !important;
        margin: 2rem 0 !important;
        padding: 0 !important;
    }

    /* 특징 섹션 2-2번 이미지 오버랩 수정 */
    .feature-text .image-wrapper {
        width: 100% !important;
        margin-top: 2rem !important;
    }

    /* 추가 기능 슬라이더 */
    .slider-wrapper {
        aspect-ratio: 4 / 3;
    }

    .slider-btn {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    /* 시스템 사양 테이블 반응형 */
    .system-req-wrapper {
        padding: 1rem;
        margin-top: 2rem;
    }

    .system-req-table th,
    .system-req-table td {
        padding: 0.8rem 0.5rem;
        font-size: 0.8rem;
    }

    /* CTA 섹션 */
    .cta-title {
        font-size: 1.8rem;
    }

    .btn-large {
        width: 100%;
        padding: 1rem 1.5rem;
        font-size: 1.1rem;
    }

    /* 네비게이션 상단 고정 대응 */
    .intro-section {
        padding-top: calc(var(--nav-height) + 4vh);
    }
    
    .intro-title {
        font-size: 2rem;
    }
    
    .intro-logo-wrapper {
        max-width: 280px;
    }

    .nav-links {
        display: none; /* 모바일에서는 심플하게 링크 숨김 처리 (추후 햄버거 메뉴 필요시 추가) */
    }
}