/* ============================================
   CSS Variables - Cinematic Theme
   ============================================ */
:root {
    --color-bg: #000000;
    --color-text: #ffffff;
    --color-text-secondary: #b3b3b3;
    --color-accent: #ffffff;
    --color-overlay: rgba(0, 0, 0, 0.4);
    
    --font-primary: 'Helvetica Neue', Arial, sans-serif;
    --font-weight-bold: 700;
    --font-weight-normal: 400;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    
    --transition-smooth: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: auto; /* Disable native smooth scroll when using Lenis */
}

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

/* ============================================
   Logo Container
   ============================================ */
.logo-container {
    position: fixed;
    top: var(--spacing-md);
    left: var(--spacing-md);
    z-index: 1000;
    pointer-events: none;
}

.logo {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-text);
    opacity: 0;
    animation: fadeIn 1s ease 0.5s forwards;
}

.logo-img {
    height: 50px;
    width: auto;
    opacity: 0;
    animation: fadeIn 1s ease 0.5s forwards;
    max-width: 250px;
    object-fit: contain;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

/* ============================================
   Hero Section - Trang chủ
   ============================================ */
.hero {
    position: relative;
    height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: #000000;
}

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

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    filter: brightness(0.4) contrast(1.1);
}

.hero-video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.3) 0%,
        rgba(0, 0, 0, 0.5) 50%,
        rgba(0, 0, 0, 0.7) 100%
    );
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--spacing-lg);
    width: 100%;
    max-width: 90%;
}

.hero-title {
    font-size: clamp(1rem, 3vw, 2.5rem);
    font-weight: 300;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    line-height: 1.4;
    perspective: 1000px;
    position: relative;
}

.hero-title-wrapper {
    display: inline-block;
    position: relative;
    white-space: nowrap;
}

.hero-text-left,
.hero-text-right {
    display: inline-block;
    position: relative;
    white-space: nowrap;
}

.hero-text-left::after {
    content: ' ';
    display: inline-block;
    width: 0.5em;
}

/* Film Logos Sidebar - Bên phải */
.film-logos-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 10%;
    height: 100vh;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg) var(--spacing-sm);
    pointer-events: none;
}

.film-logos-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
    width: 100%;
}

.film-logo-item {
    width: 100%;
    aspect-ratio: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xs);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.film-logo-item:hover {
    transform: scale(1.05);
    border-color: rgba(255, 255, 255, 0.3);
}

.film-logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.film-logo-item:hover .film-logo-img {
    opacity: 1;
}

.film-logo-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    text-align: center;
    padding: var(--spacing-xs);
}

/* ============================================
   Main Content Section - Trang thứ hai
   ============================================ */
.main-content {
    position: relative;
    background: var(--color-bg);
    padding: var(--spacing-xl) var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
    z-index: 10;
}

.content-block {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0;
    transform: translateY(50px);
}

.content-block:first-child {
    border-top: none;
}

.content-block:last-child {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.block-title {
    font-size: clamp(1.5rem, 4vw, 3rem);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    line-height: 1.2;
    margin-bottom: var(--spacing-xs);
}

.block-subtitle {
    font-size: clamp(0.8rem, 1.5vw, 1.1rem);
    font-weight: 300;
    letter-spacing: 0.1em;
    color: var(--color-text-secondary);
    text-transform: none;
}

.expand-btn {
    background: transparent;
    border: 2px solid var(--color-text);
    color: var(--color-text);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.5rem;
    font-weight: 300;
    line-height: 1;
    padding: 0;
}

.expand-btn:hover {
    background: var(--color-text);
    color: var(--color-bg);
    transform: rotate(90deg);
}

.expand-btn.expanded {
    transform: rotate(45deg);
}

.expand-icon {
    display: block;
    transition: transform 0.3s ease;
}

/* Services Details */
.services-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
}

.services-details.expanded {
    max-height: 3000px;
    opacity: 1;
    transition: max-height 0.8s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.6s ease 0.2s;
}

.service-category {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.service-category:last-child {
    border-bottom: none;
}

.service-category-title {
    font-size: clamp(0.9rem, 2vw, 1.3rem);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.service-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.service-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    opacity: 0;
    transform: translateX(-30px);
}

.service-name {
    font-size: clamp(0.75rem, 1.2vw, 0.9rem);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-weight: 300;
    color: var(--color-text);
    line-height: 1.4;
}

.service-name-vi {
    font-size: clamp(0.7rem, 1vw, 0.85rem);
    letter-spacing: 0.02em;
    color: var(--color-text-secondary);
    font-weight: 300;
    font-style: italic;
    line-height: 1.4;
}

/* Block Content */
.block-content {
    margin-top: var(--spacing-md);
}

.block-text {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    letter-spacing: 0.05em;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.block-text-vi {
    color: var(--color-text-secondary);
    font-style: italic;
}

.email-link {
    color: var(--color-text);
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    transition: border-color 0.3s ease;
}

.email-link:hover {
    border-bottom-color: var(--color-text);
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.project-item {
    aspect-ratio: 16/9;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.project-item:hover {
    transform: scale(1.02);
    border-color: rgba(255, 255, 255, 0.3);
}

.project-placeholder {
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
}

/* Cooperation List */
.cooperation-list {
    list-style: none;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.cooperation-item {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    letter-spacing: 0.05em;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-md);
    position: relative;
}

.cooperation-item::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-text-secondary);
}

.contact-info {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-text {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    letter-spacing: 0.05em;
    color: var(--color-text);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .film-logos-sidebar {
        width: 12%;
    }
}

@media (max-width: 768px) {
    .logo-container {
        top: var(--spacing-sm);
        left: var(--spacing-sm);
    }
    
    .logo {
        font-size: 1.2rem;
        letter-spacing: 0.2em;
    }
    
    .hero-content {
        padding: var(--spacing-md);
        max-width: 95%;
    }
    
    .hero-title {
        font-size: clamp(0.8rem, 4vw, 1.5rem);
    }
    
    .hero-text-left,
    .hero-text-right {
        white-space: normal;
        display: block;
        margin-bottom: 0.2em;
    }
    
    .hero-text-left::after {
        display: none;
    }
    
    .film-logos-sidebar {
        width: 15%;
        padding: var(--spacing-md) var(--spacing-xs);
    }
    
    .film-logos-container {
        gap: var(--spacing-sm);
    }
    
    .main-content {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .content-block {
        padding: var(--spacing-lg) 0;
    }
    
    .block-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1rem;
    }
    
    .hero-title {
        font-size: clamp(0.7rem, 5vw, 1.2rem);
    }
    
    .film-logos-sidebar {
        width: 20%;
        padding: var(--spacing-sm) var(--spacing-xs);
    }
    
    .main-content {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .block-title {
        font-size: clamp(1.2rem, 6vw, 2rem);
    }
    
    .block-subtitle {
        font-size: clamp(0.9rem, 4vw, 1.2rem);
    }
}