/* Shared Base Styles & Animations */
:root {
    --transition: 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    background-color: var(--ground);
    color: var(--text-main);
}

h1, h2, h3, .display-font {
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
    text-wrap: balance;
    line-height: 1.1;
}

.utility-font {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 8rem 0;
    position: relative;
}

/* Scroll Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    will-change: opacity, transform;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal-left.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal-right.active {
    opacity: 1;
    transform: translateX(0);
}

/* Theme: Institutional (Dark) */
.theme-institutional {
    --accent: #A31008;
    --accent-dark: #7A0C06;
    --ground: #FDFDFD;
    --text-main: #121212;
    --text-muted: #444444;
    --neutral: #EBEBEB;
    --neutral-dark: #BDBDBD;
    --white: #FFFFFF;
    --text-light: #FFFFFF;
    --black: #000000;
    --border-width: 3px;
}

.theme-institutional.dark-mode {
    --ground: #0F0F0F;
    --text-main: #F9F9F7;
    --text-muted: #BDBDBD;
    --neutral: #222222;
    --neutral-dark: #333333;
    --white: #1A1A1A;
}

.theme-institutional body {
    background-color: var(--ground);
    color: var(--text-main);
}

/* Theme: Corporate (Light) */
.theme-corporate {
    --accent: #A31008;
    --accent-dark: #7A0C06;
    --ground: #FFFFFF;
    --surface: #F8FAFC;
    --text-main: #0F172A;
    --text-muted: #64748B;
    --neutral: #E2E8F0;
    --white: #FFFFFF;
    --text-light: #FFFFFF;
    --black: #020617;
    --border-width: 1px;
}

.theme-corporate body {
    background-color: var(--ground);
    color: var(--text-main);
}

/* Navigation Shared */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: grid;
}

.logo img {
    grid-area: 1 / 1;
    justify-self: start;
    align-self: center;
    height: 60px;
    width: auto;
    margin: 10px 0;
    transition: opacity 0.4s ease;
}

.logo-bw { opacity: 1; }
.logo-color { opacity: 0; }

.past-hero .logo-bw { opacity: 0; }
.past-hero .logo-color { opacity: 1; }

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

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: var(--border-width);
    background: var(--accent);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Language Switcher Shared */
.lang-switcher {
    display: flex;
    align-items: center;
    background: var(--white);
    padding: 3px;
    border-radius: 999px;
    gap: 3px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.10);
}

.lang-btn {
    border: none;
    background: transparent;
    padding: 3px 12px;
    font-size: 0.7rem;
    font-weight: 700;
    cursor: pointer;
    border-radius: 999px;
    transition: var(--transition);
    text-transform: uppercase;
    font-family: 'Inter', sans-serif;
    color: var(--text-muted);
}

.lang-btn.active {
    background: transparent;
    color: var(--accent);
}

/* Hero Shared */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: var(--black);
    color: var(--text-light);
    padding-top: 80px;
}

/* Hero Slideshow: Ken Burns + crossfade */
.hero-slides {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-slide {
    position: absolute;
    inset: 0;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    opacity: 0;
    animation: heroSlide 24s linear infinite;
    will-change: opacity, transform;
}

.hero-slide:nth-child(1) { animation-delay: -3.6s; }
.hero-slide:nth-child(2) { animation-delay: -11.6s; }
.hero-slide:nth-child(3) { animation-delay: -19.6s; }

@keyframes heroSlide {
    0%   { opacity: 0; transform: scale(1.15); }
    2%   { opacity: 1; }
    33%  { opacity: 1; }
    36%  { opacity: 0; transform: scale(1); }
    100% { opacity: 0; transform: scale(1); }
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.5), rgba(0,0,0,0.7));
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 900px;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-eyebrow {
    background: var(--accent);
    color: var(--text-light);
    display: inline-block;
    padding: 0.4rem 1rem;
    font-weight: 600;
    margin-bottom: 2rem;
    font-size: 0.75rem;
    box-shadow: 0 4px 15px rgba(163, 16, 8, 0.3);
}

.hero h1 {
    font-size: clamp(3.5rem, 10vw, 6rem);
    margin-bottom: 2.5rem;
    text-shadow: 0 10px 30px rgba(0,0,0,0.5);
    color: var(--text-light);
    line-height: 0.9;
}

.hero p {
    font-size: 1.4rem;
    margin-bottom: 3.5rem;
    max-width: 650px;
    color: rgba(255,255,255,0.9);
    text-shadow: 0 4px 10px rgba(0,0,0,0.3);
    font-weight: 300;
}

/* Button Shared */
.btn {
    display: inline-block;
    padding: 1.2rem 3rem;
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: var(--border-width) solid;
    cursor: pointer;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

.btn-primary {
    background: var(--accent);
    color: var(--text-light);
    border-color: var(--accent);
    box-shadow: 0 10px 20px rgba(163, 16, 8, 0.2);
}

.btn-primary:hover {
    background: var(--white);
    color: var(--accent);
    border-color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(163, 16, 8, 0.3);
}

/* About Shared */
.about {
    background-color: var(--white);
    border-bottom: var(--border-width) solid var(--neutral);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    font-size: 3rem;
    margin-bottom: 2rem;
    position: relative;
    color: var(--text-main);
}

.about-text h2::before {
    content: '';
    position: absolute;
    left: -2rem;
    top: 0;
    bottom: 0;
    width: var(--border-width);
    background: var(--accent);
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border: var(--border-width) solid var(--neutral);
}

/* Works Shared */
.works {
    background-color: var(--ground);
}

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

.section-header h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.filter-nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1.5rem;
    border: var(--border-width) solid var(--neutral);
    background: var(--white);
    color: var(--text-main);
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.filter-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--text-light);
}

.works-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 2rem;
}

.work-card {
    position: relative;
    overflow: hidden;
    border: var(--border-width) solid var(--neutral);
    background: var(--white);
    transition: var(--transition);
    display: block;
}

.work-card.hidden {
    display: none;
}

.work-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
    display: block;
}

.work-card:hover .work-img {
    transform: scale(1.05);
    filter: brightness(0.4);
}

.work-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 2rem;
    background: linear-gradient(transparent, rgba(0,0,0,0.95));
    color: var(--text-light);
    transform: translateY(20px);
    opacity: 0;
    transition: var(--transition);
}

.work-card:hover .work-info {
    transform: translateY(0);
    opacity: 1;
}

.work-info h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.work-info p {
    font-size: 0.9rem;
    opacity: 0.9;
    color: var(--text-light);
}

.work-lg { grid-column: span 8; height: 500px; }
.work-sm { grid-column: span 4; height: 500px; }
.work-md { grid-column: span 4; height: 400px; }
.work-full { grid-column: span 12; height: 500px; }

/* Clients Shared */
.clients {
    background-color: var(--white);
    border-bottom: var(--border-width) solid var(--neutral);
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 3rem;
    align-items: center;
    justify-items: center;
}

.client-logo {
    width: 100px;
    height: auto;
    filter: grayscale(1);
    opacity: 0.5;
    transition: var(--transition);
}

.client-logo:hover {
    filter: grayscale(0);
    opacity: 1;
    transform: scale(1.1);
}

/* Contact Shared */
.contact {
    background-color: var(--ground);
    border-top: var(--border-width) solid var(--neutral);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h2 {
    font-size: 3rem;
    margin-bottom: 2rem;
    color: var(--text-main);
}

.contact-details {
    margin-bottom: 3rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.detail-item span {
    color: var(--accent);
    font-weight: 700;
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
    min-width: 100px;
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-link {
    width: 50px;
    height: 50px;
    border: var(--border-width) solid var(--neutral);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--text-main);
    transition: var(--transition);
    background: var(--white);
}

.social-link:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--text-light);
}

.contact-form {
    display: grid;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.form-group input, .form-group textarea {
    padding: 1rem;
    border: var(--border-width) solid var(--neutral);
    background: var(--white);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

footer {
    background: var(--black);
    color: var(--text-light);
    padding: 4rem 0;
    text-align: center;
    border-top: var(--border-width) solid var(--accent);
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .about-grid, .contact-grid { grid-template-columns: 1fr; }
    .works-grid > div { grid-column: span 12 !important; height: 300px !important; }
    .hero h1 { font-size: 3rem; }
    section { padding: 4rem 0; }
}

@media (prefers-reduced-motion: reduce) {
    .hero-slide { animation: none; }
    .hero-slide:nth-child(1) { opacity: 1; }
    .hero-content { animation: none; }
}