/* ============================================
   USK DESIGN STUDIOS - LUXURY WEBSITE STYLES
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Colors */
    --color-primary: #1a1a1a;
    --color-secondary: #2d2d2d;
    --color-accent: #d4af37;
    --color-accent-dark: #b8860b;
    --color-accent-light: #e8c547;
    --color-white: #ffffff;
    --color-off-white: #f8f8f6;
    --color-gray-light: #e5e5e5;
    --color-gray: #888888;
    --color-gray-dark: #4a4a4a;

    /* Typography */
    --font-heading: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 10rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
    --transition-slow: 0.6s ease;

    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-weight: 300;
    line-height: 1.7;
    color: var(--color-primary);
    background-color: var(--color-white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 400;
    line-height: 1.2;
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray);
    max-width: 600px;
}

/* Container */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    transition: var(--transition-medium);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm) 0;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    position: relative;
    z-index: 1001;
}

.nav-logo img {
    height: 60px;
    width: auto;
    transition: var(--transition-medium);
}

.navbar.scrolled .nav-logo img {
    height: 50px;
}

.logo-light {
    display: none;
}

.logo-dark {
    display: block;
}

.navbar.scrolled .logo-light {
    display: block;
}

.navbar.scrolled .logo-dark {
    display: none;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-white);
    position: relative;
}

.navbar.scrolled .nav-link {
    color: var(--color-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: var(--transition-fast);
}

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

.nav-cta {
    background: var(--color-accent);
    color: var(--color-primary) !important;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 2px;
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    background: var(--color-accent-light);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.nav-toggle .bar {
    width: 28px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition-fast);
}

.navbar.scrolled .nav-toggle .bar {
    background: var(--color-primary);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    transition: var(--transition-medium);
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--color-white);
    border: 1px solid var(--color-white);
}

.btn-secondary:hover {
    background: var(--color-white);
    color: var(--color-primary);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-large {
    padding: 1.25rem 3.5rem;
    font-size: 0.9rem;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

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

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.4) 0%,
        rgba(0, 0, 0, 0.3) 50%,
        rgba(0, 0, 0, 0.5) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 0 var(--spacing-md);
    max-width: 900px;
}

.hero-tagline {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 5rem);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-subtitle {
    font-family: var(--font-heading);
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-style: italic;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--color-white);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    margin-top: var(--spacing-sm);
    animation: scrollPulse 2s infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 1; height: 60px; }
    50% { opacity: 0.5; height: 40px; }
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
    padding: var(--spacing-xxl) 0;
    background: var(--color-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-lead {
    font-size: 1.25rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    color: var(--color-secondary);
}

.about-text {
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-md);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-light);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-gray);
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    height: 600px;
    object-fit: cover;
}

.image-accent {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--color-accent);
    z-index: -1;
}

/* ============================================
   MISSION SECTION
   ============================================ */
.mission {
    padding: var(--spacing-xxl) 0;
    background: var(--color-primary);
}

.mission-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.mission .section-label {
    color: var(--color-accent);
}

.mission-quote {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-style: italic;
    line-height: 1.6;
    color: var(--color-white);
    margin-bottom: var(--spacing-lg);
    border: none;
    padding: 0;
}

.mission-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.125rem;
}

/* ============================================
   SERVICES SECTION
   ============================================ */
.services {
    padding: var(--spacing-xxl) 0;
    background: var(--color-off-white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header .section-subtitle {
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.service-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    transition: var(--transition-medium);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 60px;
    height: 60px;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.service-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.service-text {
    color: var(--color-gray-dark);
}

/* ============================================
   MATERIALS SECTION
   ============================================ */
.materials {
    padding: var(--spacing-xxl) 0;
    background: var(--color-white);
}

.materials-table {
    margin-top: var(--spacing-lg);
}

.material-row {
    display: grid;
    grid-template-columns: 180px 1fr 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-gray-light);
}

.material-row.header {
    background: var(--color-primary);
    color: var(--color-white);
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-size: 0.85rem;
}

.material-category {
    font-weight: 600;
    color: var(--color-primary);
}

.material-ours {
    color: var(--color-secondary);
}

.material-typical {
    color: var(--color-gray);
    font-style: italic;
}

/* ============================================
   PORTFOLIO SECTION
   ============================================ */
.portfolio {
    padding: var(--spacing-xxl) 0;
    background: var(--color-off-white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    grid-template-rows: repeat(2, 350px);
    gap: var(--spacing-md);
}

.portfolio-item {
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.portfolio-item.large {
    grid-column: span 3;
    grid-row: span 2;
}

.portfolio-item:nth-child(2) { grid-column: span 3; }
.portfolio-item:nth-child(3) { grid-column: span 2; }
.portfolio-item:nth-child(4) { grid-column: span 2; }
.portfolio-item:nth-child(5) { grid-column: span 2; }

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.portfolio-item:hover img {
    transform: scale(1.1);
}

.portfolio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-md);
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    transform: translateY(100%);
    transition: var(--transition-medium);
}

.portfolio-item:hover .portfolio-overlay {
    transform: translateY(0);
}

.portfolio-category {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.portfolio-title {
    font-size: 1.25rem;
    color: var(--color-white);
}

.portfolio-cta {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* ============================================
   PHILOSOPHY SECTION
   ============================================ */
.philosophy {
    padding: var(--spacing-xxl) 0;
    background: var(--color-white);
}

.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.philosophy-card {
    padding: var(--spacing-lg);
    border: 1px solid var(--color-gray-light);
    transition: var(--transition-medium);
}

.philosophy-card:hover {
    border-color: var(--color-accent);
}

.philosophy-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 3rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.philosophy-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.philosophy-text {
    color: var(--color-gray-dark);
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
    position: relative;
    padding: var(--spacing-xxl) 0;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cta-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.cta-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cta-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 26, 0.85);
}

.cta-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.cta-text {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--color-primary);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    height: 80px;
    width: auto;
    margin-bottom: var(--spacing-md);
}

.footer-tagline {
    font-family: var(--font-heading);
    font-style: italic;
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-title {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.footer-links ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a,
.footer-contact p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-cta {
    display: inline-block;
    margin-top: var(--spacing-md);
    color: var(--color-accent);
    font-weight: 500;
    border-bottom: 1px solid var(--color-accent);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .about-image {
        order: -1;
    }

    .about-image img {
        height: 400px;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .material-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .material-row.header {
        display: none;
    }

    .material-category::before {
        content: none;
    }

    .material-ours::before {
        content: 'USK: ';
        font-weight: 600;
    }

    .material-typical::before {
        content: 'Typical: ';
    }

    .portfolio-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto;
    }

    .portfolio-item.large {
        grid-column: span 2;
        grid-row: span 1;
    }

    .portfolio-item:nth-child(2),
    .portfolio-item:nth-child(3),
    .portfolio-item:nth-child(4),
    .portfolio-item:nth-child(5) {
        grid-column: span 1;
    }

    .portfolio-item {
        height: 300px;
    }

    .philosophy-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--color-primary);
        flex-direction: column;
        justify-content: center;
        gap: var(--spacing-md);
        transition: var(--transition-medium);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-link {
        color: var(--color-white) !important;
        font-size: 1.25rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .portfolio-item.large,
    .portfolio-item:nth-child(2),
    .portfolio-item:nth-child(3),
    .portfolio-item:nth-child(4),
    .portfolio-item:nth-child(5) {
        grid-column: span 1;
    }

    .portfolio-overlay {
        transform: translateY(0);
        background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-logo {
        margin: 0 auto var(--spacing-md);
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
}

/* Intersection Observer Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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