/* ========================================
   CYGNUS FLY Landing Page
   Design Philosophy: Academic Minimalism
   ======================================== */

/* ========================================
   1. CSS Variables (Design Tokens)
   ======================================== */
:root {
    /* 색상 팔레트 (고정) */
    --color-primary: #000000;
    --color-secondary: #FFFFFF;
    --color-accent: #1A1A1A;
    --color-gray-light: #F5F5F5;
    --color-brand: #0c2663;
    
    /* 타이포그래피 - Pretendard */
    --font-serif: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --font-sans: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    
    /* 제목 크기 */
    --font-size-hero: 72px;
    --font-size-hero-desc: 28px;
    --font-size-h1: 32px;
    --font-size-h2: 56px;
    --font-size-h3: 20px;
    
    /* 본문 크기 */
    --font-size-body: 18px;
    --font-size-small: 16px;
    
    /* 레이아웃 */
    --max-width-text: 1400px;
    --max-width-container: 1600px;
    --section-padding: 120px;
    --section-gap: 100px;
    
    /* 라인 높이 */
    --line-height-title: 1.3;
    --line-height-body: 1.8;
}

/* ========================================
   2. Reset & Base Styles
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-body);
    line-height: var(--line-height-body);
    color: var(--color-primary);
    background-color: var(--color-secondary);
    overflow-x: hidden;
}

/* ========================================
   3. Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: var(--line-height-title);
    margin-bottom: 1.5rem;
}

h1 {
    font-size: var(--font-size-h1);
}

h2 {
    font-size: var(--font-size-h2);
}

h3 {
    font-size: var(--font-size-h3);
}

p {
    margin-bottom: 1.5rem;
}

p:last-child {
    margin-bottom: 0;
}

/* ========================================
   4. Header (Fixed)
   ======================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-accent);
    z-index: 1000;
    transition: all 0.3s ease;
}

.header-container {
    max-width: var(--max-width-container);
    margin: 0 auto;
    padding: 0 40px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* 로고 */
.header-logo a {
    display: block;
    transition: opacity 0.3s ease;
}

.header-logo a:hover {
    opacity: 0.7;
}

.logo-image {
    width: 200px;
    height: auto;
    display: block;
}

/* 네비게이션 */
.header-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-menu {
    display: flex;
    gap: 40px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    font-size: 14px;
    font-family: var(--font-sans);
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--color-primary);
    text-decoration: none;
    padding: 8px 12px;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    border-bottom-color: var(--color-brand);
}

/* Mobile Menu Toggle Button */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
    position: relative;
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    transition: all 0.3s ease;
    margin: 3px 0;
    position: absolute;
}

.hamburger-line:nth-child(1) {
    top: 12px;
}

.hamburger-line:nth-child(2) {
    top: 19px;
}

.hamburger-line:nth-child(3) {
    top: 26px;
}

.mobile-menu-toggle:hover .hamburger-line {
    background-color: var(--color-brand);
}

/* 햄버거 버튼이 X로 변하는 애니메이션 */
.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    top: 19px;
    transform: rotate(45deg);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    top: 19px;
    transform: rotate(-45deg);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background-color: var(--color-secondary);
    z-index: 999;
    transition: right 0.4s ease;
    overflow-y: auto;
}

.mobile-menu-overlay.active {
    right: 0;
}

.mobile-menu-close {
    display: none;
}

.mobile-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 80px 40px;
}

.mobile-nav-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    text-align: center;
    width: 100%;
}

.mobile-nav-menu li {
    margin: 0;
    padding: 0;
}

.mobile-nav-link {
    display: block;
    font-size: 24px;
    font-family: var(--font-serif);
    font-weight: 400;
    letter-spacing: 0.02em;
    color: var(--color-primary);
    text-decoration: none;
    padding: 20px;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    color: var(--color-brand);
    background-color: var(--color-gray-light);
}

/* ========================================
   5. Layout Structure
   ======================================== */
.section {
    padding: 0;
    min-height: auto;
    display: flex;
    align-items: center;
    position: relative;
    margin: 0;
}

.container {
    width: 100%;
    max-width: var(--max-width-container);
    margin: 0 auto;
    padding: 0 40px;
}

.text-block {
    max-width: var(--max-width-text);
    margin: 0 auto;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: 60px;
    align-items: start;
}

/* ========================================
   6. Hero Section (One Element - Scroll Animated)
   ======================================== */
.hero-section {
    background-color: var(--color-secondary);
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 0;
}

.hero-content {
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0;
}

/* Hero 타이틀 */
.hero-title {
    font-size: var(--font-size-hero);
    font-family: var(--font-serif);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: 0.05em;
    color: #FFFFFF;
    margin-bottom: 0;
    z-index: 3;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 0 40px;
    text-align: center;
    width: 100%;
}

/* Hero 서브타이틀 텍스트 (얇은 두께) */
.hero-subtitle-text {
    font-weight: 300;
    font-size: 0.7em;
    letter-spacing: 0.08em;
}

/* Hero 이미지 */
.hero-image {
    width: 80vw;
    height: 50vh;
    background-image: url('../img/hero_bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: fixed;
    top: 50%;
    left: 50%;
    margin-top: -25vh;
    margin-left: -40vw;
    z-index: 1;
    will-change: width, height, margin;
}

/* Hero 설명 */
.hero-description {
    font-size: var(--font-size-hero-desc);
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 1.7;
    color: #FFFFFF;
    margin-top: 0;
    opacity: 0;
    z-index: 3;
    position: fixed;
    top: 52%;
    left: 50%;
    transform: translate(-50%, 0);
    padding: 0 40px;
    text-align: center;
    width: 100%;
}

/* 기존 hero 스타일 (호환성 유지) */
.hero-container {
    display: none; /* 새로운 구조로 대체 */
}

.hero-title {
    font-size: var(--font-size-hero);
    font-family: var(--font-serif);
    letter-spacing: 0.02em;
    margin-bottom: 0.5rem;
}

.hero-subtitle {
    font-size: var(--font-size-small);
    font-family: var(--font-sans);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 3rem;
    color: var(--color-accent);
}

.hero-description {
    font-size: 22px;
    line-height: 1.7;
    font-family: var(--font-sans);
}

/* ========================================
   6. Section 1: The Context
   ======================================== */
.context-section {
    background: linear-gradient(to bottom, var(--color-secondary) 0%, #f8f9fc 50%, var(--color-secondary) 100%);
    position: relative;
    padding: 0;
    margin: 0;
    overflow: hidden;
}

.context-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 80% 50%, rgba(12, 38, 99, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.context-section .container {
    height: 100vh;
    display: flex;
    align-items: center;
}

.context-section .content-wrapper {
    display: grid;
    grid-template-columns: 55% 45%;
    gap: 0;
    align-items: center;
    position: relative;
    width: 100%;
}

.context-section .text-block {
    padding-right: 60px;
    z-index: 2;
    position: relative;
}

.context-section .section-title {
    opacity: 1;
}

.context-section .section-content p {
    opacity: 1;
}

.section-title {
    font-family: var(--font-serif);
    font-size: var(--font-size-h2);
    font-weight: 700;
    margin-bottom: 3rem;
}

.section-content p {
    font-size: var(--font-size-body);
    line-height: var(--line-height-body);
    margin-bottom: 2rem;
}

/* Context 섹션 텍스트 강조 스타일 */
.context-section .highlight-date {
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 20px;
    color: var(--color-brand);
    letter-spacing: 0.02em;
}

.context-section .highlight-text {
    font-weight: 600;
    color: var(--color-brand);
    position: relative;
    padding: 0 4px;
}

.context-section .highlight-mark {
    background: linear-gradient(to bottom, transparent 50%, rgba(12, 38, 99, 0.15) 50%);
    padding: 2px 4px;
    font-weight: 500;
}

.context-section .quote-text {
    font-family: var(--font-serif);
    font-style: italic;
    color: #555;
    font-size: 16px;
    letter-spacing: -0.01em;
    display: inline-block;
    padding: 4px 8px;
    background: var(--color-gray-light);
    border-left: 3px solid var(--color-brand);
}

.context-section .emphasis-text {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-brand);
    line-height: 1.6;
    margin-top: 2.5rem;
    padding-left: 20px;
    border-left: 4px solid var(--color-brand);
}

.context-image {
    width: 500px;
    height: 500px;
    background: transparent;
    border: none;
    border-radius: 0;
    position: relative;
    margin-left: 50px;
    z-index: 1;
    opacity: 1;
}

.context-img {
    position: absolute;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.2);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.context-img-1 {
    width: 420px;
    height: auto;
    top: 0;
    right: 0;
    z-index: 2;
}

.context-img-2 {
    width: 580px;
    height: auto;
    bottom: -60px;
    left: -30px;
    z-index: 3;
}

.context-image:hover .context-img-1 {
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}

.context-image:hover .context-img-2 {
    transform: translateY(-8px);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.3);
}

/* 마퀴 텍스트 */
.marquee-wrapper {
    position: absolute;
    bottom: 80px;
    left: 0;
    width: 100%;
    overflow: hidden;
    z-index: 0;
}

.marquee-track {
    display: flex;
    white-space: nowrap;
    will-change: transform;
}

.marquee-text {
    font-family: var(--font-serif);
    font-size: 120px;
    font-weight: 800;
    color: rgba(0, 0, 0, 0.04);
    letter-spacing: 0.08em;
    padding-right: 100px;
    text-transform: uppercase;
}

/* ========================================
   7. Section 2: The Question
   ======================================== */
.question-section {
    background-color: var(--color-secondary);
    padding: 120px 0 0 0;
    margin: 0;
    position: relative;
    overflow: hidden;
    min-height: auto;
    display: flex;
    flex-direction: column;
}

.question-section .container {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 1;
}

.question-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: stretch;
    width: 100%;
}

.question-left {
    padding-right: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.question-section .section-title {
    text-align: left;
    color: var(--color-primary);
    margin-bottom: 2rem;
    font-size: 42px;
}

.question-intro {
    font-size: 18px;
    font-weight: 400;
    color: #555;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.question-highlight {
    font-size: 18px;
    font-family: var(--font-serif);
    font-style: normal;
    line-height: 1.8;
    margin-bottom: 2rem;
    color: #555;
    font-weight: 400;
}

.question-sub {
    font-size: 17px;
    color: #777;
    margin-bottom: 0.8rem;
    line-height: 1.7;
}

.question-strong {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0;
}

.question-right {
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.comparison-box {
    background: var(--color-secondary);
    width: 100%;
    max-width: 520px;
}

.comparison-item-new {
    padding: 0;
    margin-bottom: 2rem;
}

.comparison-item-new .comparison-label {
    display: block;
    font-size: 22px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.comparison-item-new p {
    font-size: 18px;
    line-height: 1.8;
    margin: 0;
    color: #555;
}

.comparison-divider-line {
    width: 100%;
    height: 1px;
    background: #ddd;
    margin: 2rem 0;
}

/* Question 배너 */
.question-banner {
    width: 100%;
    height: 320px;
    background-image: url('../img/question_img1.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 100px;
    transform-origin: center;
    clip-path: polygon(50% 0%, 50% 0%, 50% 100%, 50% 100%);
}

.question-banner-logo {
    width: 300px;
    height: auto;
    filter: brightness(0) invert(1);
    opacity: 0;
}

/* ========================================
   8. Section 3: Triangular Asset Structure
   ======================================== */
.triangular-section {
    background: #FFFFFF;
    position: relative;
    min-height: auto;
    padding: 120px 0;
}

.triangular-section .section-title {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 48px;
}

.triangular-section .section-title strong {
    color: var(--color-primary);
    font-weight: 700;
}

.triangular-intro {
    max-width: 900px;
    margin: 0 auto 5rem;
    text-align: center;
}

.triangular-intro p {
    font-size: 17px;
    line-height: 1.8;
    margin-bottom: 1rem;
    color: #555;
}

.asset-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    width: 100%;
    margin-bottom: 5rem;
}

.asset-card {
    background: var(--color-secondary);
    border: none;
    border-radius: 0;
    padding: 4rem 3rem;
    box-shadow: none;
    opacity: 1;
    transform: translateY(0);
    transition: transform 0.3s ease;
    min-height: 480px;
    display: flex;
    flex-direction: column;
}

.asset-card-1 {
    background: #0c2663;
    color: #FFFFFF;
}

.asset-card-2 {
    background: #E8EEF5;
    color: var(--color-primary);
}

.asset-card-3 {
    background: #E8EEF5;
    color: var(--color-primary);
}

.asset-card-header {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 3rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.asset-card-1 .asset-card-header {
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.asset-card-2 .asset-card-header,
.asset-card-3 .asset-card-header {
    border-bottom-color: rgba(0, 0, 0, 0.1);
}

.asset-number {
    font-size: 28px;
    font-weight: 700;
    line-height: 1;
    opacity: 1;
}

.asset-card-1 .asset-number {
    color: #FFFFFF;
}

.asset-card-2 .asset-number,
.asset-card-3 .asset-number {
    color: var(--color-primary);
}

.asset-title {
    font-family: var(--font-serif);
    font-size: 28px !important;
    font-weight: 700;
    margin: 0;
    display: block;
    line-height: 1.3;
}

.asset-card-1 .asset-title {
    color: #FFFFFF;
}

.asset-subtitle {
    font-size: 16px;
    font-weight: 300;
    color: inherit;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0.7;
    margin-left: 0.5rem;
}

.asset-card-body {
    padding-left: 0;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.asset-role {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 0;
}

.asset-card-1 .asset-role {
    color: #FFFFFF;
}

.asset-card-2 .asset-role,
.asset-card-3 .asset-role {
    color: var(--color-primary);
}

.asset-card-body p:not(.asset-role) {
    font-size: 16px;
    line-height: 1.9;
    margin: 0;
}

.asset-card-1 .asset-card-body p:not(.asset-role) {
    color: rgba(255, 255, 255, 0.9);
}

.asset-card-2 .asset-card-body p:not(.asset-role),
.asset-card-3 .asset-card-body p:not(.asset-role) {
    color: #555;
}

.principle-block {
    margin: 0 auto;
    padding: 0;
    background: transparent;
    color: var(--color-primary);
    border-radius: 0;
    text-align: center;
    max-width: 1200px;
    opacity: 1;
    border-top: none;
    padding-top: 2rem;
}

.principle-title {
    font-family: var(--font-serif);
    font-size: 40px !important;
    font-weight: 700;
    margin-bottom: 2.5rem;
    color: var(--color-primary);
    position: relative;
    display: inline-block;
    line-height: 1.2;
}

.principle-title::before {
    display: none;
}

.principle-block p {
    font-size: 20px;
    line-height: 1.9;
    margin: 0;
    color: #555;
}

/* ========================================
   9. Section 4: Technology as Infrastructure
   ======================================== */
.technology-section {
    background-color: #F5F5F5;
    position: relative;
    overflow: hidden;
    padding: 120px 0;
}

/* 배경 블록들 */
.technology-bg-blocks {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.tech-block {
    position: absolute;
    background-size: cover;
    background-position: center;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

.tech-block-1 {
    width: 100px;
    height: 140px;
    left: 2%;
    top: 2%;
    background-image: url('../img/logo_sym2.png');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.5;
}

.tech-block-2 {
    width: 80px;
    height: 110px;
    right: 3%;
    top: 5%;
    background-image: url('../img/logo_sym1.png');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.5;
}

.tech-block-3 {
    width: 120px;
    height: 90px;
    left: 8%;
    top: 30%;
    background-image: url('../img/logo_sym3.png');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.5;
}

.tech-block-4 {
    width: 90px;
    height: 120px;
    right: 6%;
    top: 60%;
    background-image: url('../img/logo_sym1.png');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.5;
}

.tech-block-5 {
    width: 65px;
    height: 85px;
    left: 28%;
    top: 45%;
    background-image: url('../img/logo_sym2.png');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.5;
}

.tech-block-6 {
    width: 85px;
    height: 115px;
    right: 25%;
    top: 22%;
    background-image: url('../img/logo_sym3.png');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.5;
}

.tech-block-7 {
    width: 105px;
    height: 95px;
    left: 1%;
    top: 70%;
    background-image: url('../img/logo_sym1.png');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.5;
}

.tech-block-8 {
    width: 75px;
    height: 100px;
    right: 2%;
    top: 88%;
    background-image: url('../img/logo_sym2.png');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.5;
}

.tech-block-9 {
    width: 95px;
    height: 80px;
    left: 18%;
    top: 12%;
    background-image: url('../img/logo_sym3.png');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.5;
}

.tech-block-10 {
    width: 70px;
    height: 95px;
    right: 18%;
    top: 50%;
    background-image: url('../img/logo_sym1.png');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.5;
}

.technology-section .container {
    position: relative;
    z-index: 1;
}

.technology-section .text-block {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.technology-section .section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.technology-section .section-content {
    text-align: center;
}

.technology-section .section-content p {
    font-size: 19px;
    line-height: 1.9;
    margin-bottom: 2rem;
    color: #555;
}

.technology-section .section-content p:first-child {
    font-size: 28px;
    font-weight: 600;
    color: var(--color-brand);
    margin-bottom: 2.5rem;
}

.technology-image {
    display: none;
}

/* ========================================
   10. Section 5: Four Principles
   ======================================== */
.principles-section {
    background-color: var(--color-secondary);
    padding: 120px 0;
}

.principles-section .section-title {
    text-align: center;
    margin-bottom: 2rem;
}

.intro-text {
    font-size: 17px;
    margin-bottom: 5rem;
    text-align: center;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    color: #555;
    line-height: 1.8;
}

.intro-text strong {
    color: var(--color-primary);
    font-weight: 700;
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin: 0;
}

.principle-item {
    position: relative;
    height: 450px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: flex-start;
    padding: 0;
    border: none;
    overflow: hidden;
}

.principle-item-1 {
    background-image: url('../img/principles_img1.png');
}

.principle-item-2 {
    background-image: url('../img/principles_img2.png');
}

.principle-item-3 {
    background-image: url('../img/principles_img3.png');
}

.principle-item-4 {
    background-image: url('../img/principles_img4.png');
}

.principle-content {
    background: transparent;
    padding: 2.5rem 2rem;
    width: 100%;
}

.principle-item-title {
    font-family: var(--font-serif);
    font-size: 20px !important;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #FFFFFF;
    line-height: 1.4;
}

.principle-item p {
    font-size: 15px;
    line-height: 1.8;
    margin: 0;
    color: rgba(255, 255, 255, 0.9);
}

.conclusion-text {
    display: none;
}

/* ========================================
   11. Section 6: Risk and Continuity
   ======================================== */
.risk-section {
    background-color: transparent;
    padding: 0;
}

.risk-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    align-items: stretch;
    max-width: none;
    margin: 0 auto;
    padding: 0;
    min-height: 700px;
}

.risk-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    overflow: hidden;
}

.risk-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.risk-text {
    padding: 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: transparent;
    width: 100%;
}

.risk-text .section-title {
    text-align: left;
    margin-bottom: 2.5rem;
    font-size: 48px;
}

.risk-intro {
    font-size: 26px !important;
    font-weight: 700;
    color: var(--color-brand);
    margin-bottom: 2rem;
}

.risk-text p:not(.risk-intro) {
    font-size: 16px;
    line-height: 1.9;
    color: #555;
    margin-bottom: 1.5rem;
}

/* ========================================
   12. Conclusion Section
   ======================================== */
.conclusion-section {
    background-color: #FFFFFF;
    padding: 0;
    min-height: auto;
}

.conclusion-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    align-items: stretch;
    max-width: none;
    margin: 0 auto;
    padding: 0;
    min-height: 700px;
}

.conclusion-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    overflow: hidden;
}

.conclusion-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.conclusion-text {
    padding: 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: #FFFFFF;
    width: 100%;
}

.conclusion-text .section-title {
    text-align: left;
    margin-bottom: 2.5rem;
    font-size: 48px;
}

.conclusion-intro {
    font-size: 26px !important;
    font-weight: 700;
    color: var(--color-brand);
    margin-bottom: 2rem;
}

.conclusion-text p:not(.conclusion-intro) {
    font-size: 16px;
    line-height: 1.9;
    color: #555;
    margin-bottom: 1.5rem;
}

.final-statement {
    display: none;
}

.conclusion-content {
    display: none;
}

/* ========================================
   13. Image Areas (Placeholder Styles)
   ======================================== */
.image-area {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.03;
}

/* ========================================
   14. Footer
   ======================================== */
.site-footer {
    background-color: #1A1A1A;
    color: var(--color-secondary);
    padding: 40px 0;
}

.footer-container {
    max-width: var(--max-width-container);
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-left {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-logo {
    width: 140px;
    height: auto;
    filter: brightness(0) invert(1);
}

.footer-tagline {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
}

.footer-right {
    display: flex;
    align-items: center;
}

.footer-copyright {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
}

.footer-legal {
    display: none;
}

.footer-top,
.footer-bottom,
.footer-brand,
.footer-nav,
.footer-nav-group {
    display: none;
}

/* ========================================
   15. Responsive Design - Tablet
   ======================================== */
@media screen and (max-width: 1199px) {
    :root {
        --font-size-hero: 56px;
        --font-size-h1: 28px;
        --font-size-h2: 42px;
        --font-size-h3: 18px;
        --font-size-body: 16px;
        --section-padding: 80px;
        --section-gap: 60px;
    }
    
    .container {
        padding: 0 40px;
    }
    
    .section {
        padding: 80px 0;
    }
    
    /* Hero Section - Tablet */
    .hero-title {
        font-size: 56px;
    }
    
    .hero-description {
        font-size: 20px;
    }
    
    /* Context Section - Tablet */
    /* Context Section - Tablet */
    .context-section .container {
        height: auto;
        display: block;
    }
    
    .context-section .content-wrapper {
        display: flex;
        flex-direction: column;
        gap: 60px;
    }
    
    .context-section .text-block {
        padding-right: 0;
        max-width: 100%;
    }
    
    .context-content {
        gap: 60px;
    }
    
    .context-img-1 {
        width: 320px;
        height: 320px;
    }
    
    .context-img-2 {
        width: 450px;
        height: 450px;
    }
    
    .context-marquee {
        font-size: 80px;
    }
    
    /* Question Section - Tablet */
    .question-layout {
        gap: 60px;
    }
    
    .question-left,
    .question-right {
        padding: 0 20px;
    }
    
    .question-intro {
        font-size: 20px;
    }
    
    .question-highlight {
        font-size: 24px;
    }
    
    .comparison-box {
        padding: 2.5rem 2rem;
    }
    
    .question-banner {
        height: 260px;
        margin-top: 80px;
    }
    
    .question-banner-logo {
        width: 240px;
    }
    
    /* Triangular Section - Tablet */
    .asset-cards {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .asset-card {
        min-height: auto;
        padding: 3rem 2.5rem;
    }
    
    .principle-block {
        margin-top: 4rem;
    }
    
    .principle-title {
        font-size: 36px !important;
    }
    
    /* Technology Section - Tablet */
    .technology-section .section-content p:first-of-type {
        font-size: 24px;
    }
    
    /* Technology Background Blocks - Tablet */
    .tech-block-1 {
        width: 80px;
        height: 110px;
    }
    
    .tech-block-2 {
        width: 65px;
        height: 90px;
    }
    
    .tech-block-3 {
        width: 100px;
        height: 75px;
    }
    
    .tech-block-4 {
        width: 75px;
        height: 100px;
    }
    
    .tech-block-5 {
        width: 55px;
        height: 70px;
    }
    
    .tech-block-6 {
        width: 70px;
        height: 95px;
    }
    
    .tech-block-7 {
        width: 85px;
        height: 75px;
    }
    
    .tech-block-8 {
        width: 60px;
        height: 80px;
    }
    
    .tech-block-9 {
        width: 75px;
        height: 65px;
    }
    
    .tech-block-10 {
        width: 55px;
        height: 75px;
    }
    
    /* Principles Section - Tablet */
    .principles-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    .principle-item {
        height: 380px;
    }
    
    /* Risk & Conclusion Section - Tablet */
    .risk-section,
    .conclusion-section {
        min-height: 600px;
    }
    
    .risk-text,
    .conclusion-text {
        padding: 60px;
    }
    
    .risk-section .section-title,
    .conclusion-section .section-title {
        font-size: 42px !important;
    }
    
    .risk-intro,
    .conclusion-intro {
        font-size: 24px !important;
    }
}

/* ========================================
   16. Responsive Design - Mobile
   ======================================== */
@media screen and (max-width: 767px) {
    :root {
        --font-size-hero: 32px;
        --font-size-h1: 22px;
        --font-size-h2: 28px;
        --font-size-h3: 16px;
        --font-size-body: 14px;
        --font-size-small: 13px;
        --section-padding: 60px;
        --section-gap: 40px;
        --max-width-text: 100%;
    }
    
    body {
        word-break: keep-all;
        word-wrap: break-word;
    }
    
    .container {
        padding: 0 20px;
    }
    
    .section {
        min-height: auto;
        padding: 60px 0;
    }
    
    p, h1, h2, h3, h4, h5, h6 {
        word-break: keep-all;
        word-wrap: break-word;
    }
    
    /* Header - Mobile */
    .site-header {
        padding: 15px 0;
        height: 70px;
    }
    
    .header-container {
        padding: 0 20px;
    }
    
    .header-logo {
        width: auto;
    }
    
    .logo-image {
        width: 110px;
    }
    
    .header-nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    /* Mobile Navigation Menu */
    .mobile-nav-link {
        font-size: 22px;
        padding: 18px;
    }
    
    /* Hero Section - Mobile */
    .hero-section {
        min-height: 100vh;
        padding: 80px 0 60px;
    }
    
    .hero-content {
        padding: 0 20px;
    }
    
    .hero-title {
        font-size: 32px;
        line-height: 1.3;
        margin-bottom: 20px;
    }
    
    .hero-subtitle-text {
        font-size: 0.6em;
        display: block;
        margin-top: 10px;
        letter-spacing: 0.06em;
    }
    
    .hero-description {
        font-size: 14px;
        line-height: 1.7;
        max-width: 100%;
    }
    
    /* Context Section - Mobile */
    .context-section {
        padding: 60px 0;
    }
    
    .context-section .container {
        height: auto;
        display: block;
    }
    
    .context-section .content-wrapper {
        display: flex;
        flex-direction: column;
        gap: 40px;
        grid-template-columns: 1fr;
    }
    
    .context-section .text-block {
        padding-right: 0;
        order: 1;
        max-width: 100%;
    }
    
    .text-block {
        max-width: 100%;
        padding: 0 20px;
    }
    
    .section-title {
        font-size: 26px !important;
        margin-bottom: 1.5rem;
        line-height: 1.3;
    }
    
    .section-content p {
        font-size: 14px;
        line-height: 1.8;
    }
    
    /* Context 섹션 강조 텍스트 - Mobile */
    .context-section .highlight-date {
        font-size: 15px;
    }
    
    .context-section .emphasis-text {
        font-size: 15px;
    }
    
    .context-image {
        width: 100%;
        height: auto;
        min-height: 400px;
        margin: 0;
        position: relative;
        order: 2;
    }
    
    .context-img-1 {
        width: 180px;
        height: 180px;
        top: 0;
        right: 10px;
    }
    
    .context-img-2 {
        width: 260px;
        height: 260px;
        bottom: -40px;
        left: 10px;
    }
    
    .marquee-wrapper {
        order: 3;
    }
    
    .context-marquee {
        font-size: 40px;
        padding: 30px 0;
    }
    
    /* Question Section - Mobile */
    .question-section {
        padding: 60px 0 0 0;
    }
    
    .question-layout {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 0 20px;
    }
    
    .question-left,
    .question-right {
        padding: 0;
        text-align: center;
    }
    
    .question-left .section-title {
        text-align: center;
    }
    
    .question-left h2 {
        margin-bottom: 1rem;
        text-align: center;
    }
    
    .question-intro {
        font-size: 15px;
        line-height: 1.7;
        margin-bottom: 1rem;
    }
    
    .question-highlight {
        font-size: 17px;
        padding: 1rem 0;
        margin: 1.2rem 0;
        line-height: 1.5;
    }
    
    .question-left p {
        margin-bottom: 1rem;
    }
    
    .question-left p:last-child {
        margin-bottom: 0;
    }
    
    .comparison-box {
        gap: 25px;
        padding: 2rem 1.5rem;
    }
    
    .comparison-label {
        font-size: 16px;
        margin-bottom: 0.5rem;
    }
    
    .comparison-item-new p {
        font-size: 14px;
        line-height: 1.7;
    }
    
    .question-banner {
        height: 180px;
        margin-top: 60px;
    }
    
    .question-banner-logo {
        width: 150px;
    }
    
    /* Triangular Section - Mobile */
    .triangular-section {
        padding: 60px 0;
    }
    
    .asset-cards {
        grid-template-columns: 1fr;
        gap: 25px;
        padding: 0 20px;
    }
    
    .asset-card {
        min-height: auto;
        padding: 2rem 1.5rem;
    }
    
    .asset-card-header {
        margin-bottom: 1.5rem;
    }
    
    .asset-number {
        font-size: 18px;
    }
    
    .asset-title {
        font-size: 20px !important;
        line-height: 1.3 !important;
        margin-bottom: 0.5rem !important;
    }
    
    .asset-subtitle {
        font-size: 13px;
        letter-spacing: 0.08em;
    }
    
    .asset-role {
        font-size: 16px;
        margin-bottom: 1rem;
    }
    
    .asset-card-body p:not(.asset-role) {
        font-size: 14px;
        line-height: 1.8;
    }
    
    .principle-block {
        margin-top: 3rem;
        padding: 1.5rem 20px;
    }
    
    .principle-title {
        font-size: 24px !important;
        line-height: 1.3 !important;
        margin-bottom: 1rem;
    }
    
    .principle-block p {
        font-size: 15px;
        line-height: 1.8;
    }
    
    /* Technology Section - Mobile */
    .technology-section {
        padding: 60px 0;
    }
    
    .technology-section .section-content {
        padding: 0 20px;
    }
    
    .technology-section .section-title {
        font-size: 26px !important;
    }
    
    .technology-section .section-content p:first-of-type {
        font-size: 17px;
        font-weight: 600;
        margin-bottom: 1.5rem;
        line-height: 1.5;
    }
    
    .technology-section .section-content p {
        font-size: 14px;
        line-height: 1.8;
    }
    
    /* Technology Background Blocks - Mobile */
    .tech-block-1 {
        width: 55px;
        height: 75px;
        left: 5%;
        top: 5%;
    }
    
    .tech-block-2 {
        width: 45px;
        height: 65px;
        right: 5%;
        top: 15%;
    }
    
    .tech-block-3 {
        width: 65px;
        height: 50px;
        left: 10%;
        top: 35%;
    }
    
    .tech-block-4 {
        width: 50px;
        height: 70px;
        right: 8%;
        top: 55%;
    }
    
    .tech-block-5 {
        width: 40px;
        height: 55px;
        left: 50%;
        top: 45%;
        transform: translateX(-50%);
    }
    
    .tech-block-6 {
        width: 45px;
        height: 65px;
        right: 30%;
        top: 25%;
    }
    
    .tech-block-7 {
        width: 55px;
        height: 50px;
        left: 3%;
        top: 70%;
    }
    
    .tech-block-8 {
        width: 40px;
        height: 55px;
        right: 5%;
        top: 80%;
    }
    
    .tech-block-9 {
        width: 50px;
        height: 45px;
        left: 25%;
        top: 18%;
    }
    
    .tech-block-10 {
        width: 35px;
        height: 50px;
        right: 25%;
        top: 60%;
    }
    
    /* Principles Section - Mobile */
    .principles-section {
        padding: 60px 0;
    }
    
    .principles-section .section-title {
        font-size: 26px !important;
        padding: 0 20px;
    }
    
    .intro-text {
        margin-bottom: 2.5rem;
        padding: 0 20px;
        font-size: 14px;
        line-height: 1.8;
    }
    
    .intro-text strong {
        font-size: 15px;
    }
    
    .principles-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 20px;
    }
    
    .principle-item {
        height: 280px;
    }
    
    .principle-content {
        padding: 1.8rem 1.3rem;
    }
    
    .principle-item-title {
        font-size: 17px;
        margin-bottom: 0.8rem;
        line-height: 1.3;
    }
    
    .principle-item p {
        font-size: 13px;
        line-height: 1.7;
    }
    
    /* Risk Section - Mobile */
    .risk-section {
        min-height: auto;
        padding: 50px 0;
    }
    
    .risk-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .risk-image {
        height: 280px;
        order: 1;
    }
    
    .risk-text {
        padding: 30px 20px;
        order: 2;
        display: block;
        justify-content: flex-start;
    }
    
    .risk-section .section-title {
        font-size: 26px !important;
        line-height: 1.3;
        margin-bottom: 1rem;
    }
    
    .risk-intro {
        font-size: 17px !important;
        font-weight: 700;
        margin-bottom: 1rem;
        line-height: 1.5;
    }
    
    .risk-text p:not(.risk-intro) {
        font-size: 14px;
        line-height: 1.8;
        margin-bottom: 1rem;
    }
    
    .risk-text p:last-child {
        margin-bottom: 0;
    }
    
    /* Conclusion Section - Mobile */
    .conclusion-section {
        min-height: auto;
        padding: 50px 0;
    }
    
    .conclusion-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .conclusion-image {
        height: 280px;
        order: 1;
    }
    
    .conclusion-text {
        padding: 30px 20px;
        order: 2;
        display: block;
        justify-content: flex-start;
    }
    
    .conclusion-section .section-title {
        font-size: 26px !important;
        line-height: 1.3;
        margin-bottom: 1rem;
    }
    
    .conclusion-intro {
        font-size: 17px !important;
        font-weight: 700;
        margin-bottom: 1rem;
        line-height: 1.5;
    }
    
    .conclusion-text p:not(.conclusion-intro) {
        font-size: 14px;
        line-height: 1.8;
        margin-bottom: 1rem;
    }
    
    .conclusion-text p:last-child {
        margin-bottom: 0;
    }
    
    /* Footer - Mobile */
    .site-footer {
        padding: 30px 0;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 15px;
        padding: 0 20px;
        text-align: center;
    }
    
    .footer-left {
        align-items: center;
    }
    
    .footer-logo {
        width: 90px;
    }
    
    .footer-tagline {
        font-size: 11px;
        line-height: 1.5;
    }
    
    .footer-right {
        justify-content: center;
    }
    
    .footer-copyright {
        font-size: 11px;
    }
}

/* ========================================
   17. Print Styles
   ======================================== */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .section {
        page-break-inside: avoid;
    }
    
    .image-area {
        display: none;
    }
}

/* ========================================
   17. Animation Preparation Classes
   ======================================== */
.fade-in-element {
    opacity: 0;
    transform: translateY(30px);
}

.fade-in-element.animated {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   18. Accessibility
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* 포커스 스타일 */
:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

/* ========================================
   19. Selection Style
   ======================================== */
::selection {
    background-color: var(--color-primary);
    color: var(--color-secondary);
}

::-moz-selection {
    background-color: var(--color-primary);
    color: var(--color-secondary);
}