/* ==========================================================================
   FILM PRODUCTION - SpaceX Style
   ========================================================================== */

/* Variables */
:root {
    /* Colors */
    --color-black: #000000;
    --color-black-alt: #0a0a0a;
    --color-white: #ffffff;
    --color-white-80: rgba(255, 255, 255, 0.8);
    --color-white-20: rgba(255, 255, 255, 0.2);
    --color-white-10: rgba(255, 255, 255, 0.1);
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-thin: 200;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 5rem;
    --spacing-4xl: 8rem;
    
    /* Layout */
    --container-max-width: 1400px;
    --container-padding: 3rem;
    --section-padding-x: 3rem;
    
    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-normal: 1s ease;
    --transition-slow: 1.2s ease;
    
}

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

html {
    scroll-behavior: smooth;
    scroll-snap-type: y mandatory;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-black);
    color: var(--color-white);
    overflow-x: hidden;
    line-height: 1.6;
}

/* ==========================================================================
   Sections - Common
   ========================================================================== */

section {
    width: 100%;
    height: 100vh;
    scroll-snap-align: start;
    scroll-snap-stop: always;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 0 var(--section-padding-x);
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background-color: transparent;
    transition: background-color var(--transition-fast), padding var(--transition-fast);
    padding: var(--spacing-md) 0;
}

.navbar.scrolled {
    background-color: rgba(0, 0, 0, 0.95);
    padding: var(--spacing-sm) 0;
}

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

.nav-logo img {
    height: 35px;
    width: auto;
    transition: opacity var(--transition-fast);
}

.nav-logo:hover img {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    gap: 3rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu a {
    color: #fff;
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: color var(--transition-fast);
}

.nav-menu a:hover {
    color: #999;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    position: relative;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
}

.hero-content {
    text-align: center;
    z-index: 1;
    padding: 0 var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(1.5rem, 5vw, 8rem);
    font-weight: var(--font-weight-thin);
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: clamp(2rem, 4vw, 3.5rem);
    opacity: 0;
    animation: fadeInUp var(--transition-slow) 0.3s forwards;
    hyphens: auto;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.title-line {
    display: block;
}

.hero-description {
    max-width: clamp(600px, 75vw, 900px);
    margin: 0 auto clamp(2rem, 5vw, 5rem);
    opacity: 0;
    animation: fadeInUp var(--transition-slow) 0.6s forwards;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.hero-description p {
    font-size: clamp(0.875rem, 1.5vw, 1.125rem);
    font-weight: var(--font-weight-light);
    letter-spacing: 0;
    line-height: 1.5;
    color: var(--color-white);
    margin-bottom: 0;
}


.hero-scroll {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    opacity: 0;
    animation: fadeInUp var(--transition-slow) 0.9s forwards;
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
}

.hero-scroll span {
    font-size: 0.6875rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--color-white-80);
}

.scroll-indicator {
    width: 1px;
    height: 50px;
    background-color: var(--color-white);
    animation: scrollDown 2s infinite;
    opacity: 0.6;
}

/* ==========================================================================
   Film Sections
   ========================================================================== */

.film-section {
    background-color: var(--color-black);
}

.film-section:nth-child(odd) {
    background-color: var(--color-black-alt);
}

.film-section-with-video {
    position: relative;
    overflow: hidden;
}

/* 통합: 비디오 및 이미지 배경 공통 스타일 */
.film-video-background,
.film-image-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

.film-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* YouTube 배경 비디오 스타일 */
.film-youtube-video {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100vw;
    height: 100vh;
    min-width: 100%;
    min-height: 100%;
    transform: translate(-50%, -50%) scale(1.2);
    pointer-events: none;
    border: none;
    z-index: 0;
}

/* 모바일 대응 */
@media (max-width: 768px) {
    .film-youtube-video {
        width: 177.77777778vh;
        height: 100vh;
        min-width: 100vw;
        transform: translate(-50%, -50%) scale(1.5);
    }
}

.film-container {
    max-width: var(--container-max-width);
    width: 100%;
    height: 100%;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    padding: 0 var(--section-padding-x);
    display: flex;
    align-items: center;
}

/* 지그재그 타이틀 배치: 홀수(1,3,5,7,9...)는 왼쪽, 짝수(2,4,6,8,10...)는 오른쪽 */
/* 왼쪽 타이틀 (홀수) */
#film-1 .film-container,
#film-3 .film-container,
#film-5 .film-container,
#film-7 .film-container,
#film-9 .film-container,
#film-11 .film-container,
#film-13 .film-container {
    justify-content: flex-start;
}

/* 오른쪽 타이틀 (짝수) */
#film-2 .film-container,
#film-4 .film-container,
#film-6 .film-container,
#film-8 .film-container,
#film-10 .film-container,
#film-12 .film-container {
    justify-content: flex-end;
}

.film-content {
    max-width: 600px;
    opacity: 0;
    transform: translateY(50px);
    transition: all var(--transition-normal);
}

.film-section.visible .film-content {
    opacity: 1;
    transform: translateY(0);
}

.film-category {
    font-size: 0.75rem;
    font-weight: var(--font-weight-normal);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-white-80);
    margin-bottom: var(--spacing-md);
    opacity: 0.8;
    text-align: left;
}

.film-title {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
    color: var(--color-white);
    text-align: left;
    margin-left: 0;
}

.film-title-korean {
    font-size: 14px;
    font-weight: var(--font-weight-light);
    letter-spacing: 0;
    line-height: 1.5;
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
    text-align: left;
    margin-left: 0;
}

.film-director {
    font-size: clamp(0.875rem, 1.5vw, 1.125rem);
    line-height: 1.5;
    color: var(--color-white);
    font-weight: var(--font-weight-light);
    max-width: 600px;
    letter-spacing: 0;
    text-align: left;
    margin-left: 0;
}

.film-awards {
    font-size: clamp(0.75rem, 1.3vw, 0.95rem);
    line-height: 1.6;
    color: var(--color-white-80);
    font-weight: var(--font-weight-light);
    max-width: 600px;
    letter-spacing: 0;
    text-align: left;
    margin-left: 0;
    margin-top: var(--spacing-lg);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */

.contact-section {
    background-color: var(--color-black);
    scroll-margin-top: 80px;
}

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

.contact-title {
    font-size: clamp(3rem, 6vw, 8rem);
    font-weight: var(--font-weight-thin);
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-3xl);
    line-height: 1;
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-normal);
}

.contact-title.visible {
    opacity: 1;
    transform: translateY(0);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-2xl);
}

.contact-item {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.contact-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.contact-item:nth-child(1) { transition-delay: 0.1s; }
.contact-item:nth-child(2) { transition-delay: 0.2s; }
.contact-item:nth-child(3) { transition-delay: 0.3s; }

.contact-item h3 {
    font-size: 0.75rem;
    font-weight: var(--font-weight-normal);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
    color: var(--color-white-80);
}

.contact-item p {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    line-height: 1.8;
    color: var(--color-white);
    font-weight: var(--font-weight-light);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
    border-top: 1px solid var(--color-white-10);
    padding: var(--spacing-lg) var(--container-padding);
    background-color: var(--color-black);
    position: relative;
    z-index: 10;
}

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

.footer-container p {
    font-size: 0.75rem;
    color: var(--color-white-80);
    font-weight: var(--font-weight-light);
    letter-spacing: 0.05em;
    text-align: center;
}

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scrollDown {
    0%, 100% {
        transform: translateY(0);
        opacity: 0.6;
    }
    50% {
        transform: translateY(25px);
        opacity: 0;
    }
}

/* ==========================================================================
   Scrollbar
   ========================================================================== */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-black);
}

::-webkit-scrollbar-thumb {
    background: var(--color-white-20);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 1024px) {
    :root {
        --container-padding: 2rem;
        --section-padding-x: 2rem;
    }
    
    .contact-info {
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    html {
        scroll-snap-type: none;
    }
    
    :root {
        --container-padding: 1.5rem;
        --section-padding-x: 1.5rem;
    }
    
    /* Hide navbar logo when hero section is visible (top of page) */
    .navbar:not(.scrolled) .nav-logo {
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-fast), visibility var(--transition-fast);
    }
    
    .navbar.scrolled .nav-logo {
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu {
        display: none;
    }
    
    .hero-content {
        padding: 0 var(--spacing-md);
    }
    
    .hero-description {
        padding: 0 var(--spacing-xs);
    }
    
    .contact-info {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .film-container {
        justify-content: center;
        text-align: center;
    }
    
    .film-content {
        max-width: 100%;
    }
    
    .footer-container {
        justify-content: center;
    }
    
    .hero-scroll {
        position: relative;
        bottom: auto;
        margin-top: var(--spacing-xl);
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 1rem;
        --section-padding-x: 1.5rem;
    }
    
    .hero-content {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: clamp(1.5rem, 8vw, 3rem);
        margin-bottom: clamp(1.5rem, 5vw, 2rem);
        line-height: 1.1;
    }
    
    .hero-description {
        max-width: 100%;
        margin-bottom: clamp(1.5rem, 5vw, 2.5rem);
        padding: 0 var(--spacing-xs);
    }
    
    .hero-description p {
        font-size: clamp(0.75rem, 3.5vw, 1rem);
        line-height: 1.7;
    }
    
    .site-footer {
        padding: var(--spacing-lg) var(--spacing-md);
    }
}