/* =========================================
   Design System & Variables (Luxury Black Edition)
   ========================================= */
:root {
    /* Color System — Luxury Black Edition */
    --clr-primary: #0A0A0A; /* Primary Background */
    --clr-secondary: #F5F5F5; /* Text Primary */
    --clr-accent: #D5AF36; /* Luxury Gold Accent */
    --clr-neutral: #151515; /* Dark Surface */
    --clr-surface: #1B1B1B; /* Secondary Surface */
    --clr-elevated: #222222; /* Elevated Surface */
    --clr-text-secondary: #BDBDBD; /* Text Secondary */
    --clr-accent-hover: #E4C04D; /* Gold Hover */
    
    /* Typography */
    --font-primary: 'Poppins', sans-serif;
    --fw-light: 300;
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    
    /* Layout */
    --container-width: 1200px;
    --transition-smooth: 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    background-color: var(--clr-primary);
    color: var(--clr-secondary);
    line-height: 1.6;
    font-weight: var(--fw-regular);
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--fw-semibold);
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--clr-secondary);
}

p {
    margin-bottom: 1.5rem;
    color: var(--clr-text-secondary);
}

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

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

/* Global overflow safety for all sections */
section {
    overflow-x: hidden;
}

ul {
    list-style: none;
}

/* =========================================
   Utility Classes
   ========================================= */
.container {
    width: 90%;
    max-width: var(--container-width);
    margin: 0 auto;
}

.section-padding {
    padding: clamp(4rem, 8vw, 8rem) 0;
}

.bg-neutral {
    background-color: var(--clr-neutral);
}

.bg-surface {
    background-color: var(--clr-surface);
}

.text-center { text-align: center; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

/* Buttons */
.btn-primary {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--clr-accent);
    color: #111111;
    font-weight: var(--fw-medium);
    font-size: clamp(0.85rem, 2vw, 0.95rem);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 1px solid var(--clr-accent);
    transition: var(--transition-smooth);
}

.btn-primary:hover {
    background-color: var(--clr-accent-hover);
    color: #111111;
}

.btn-outline {
    display: inline-block;
    padding: 1rem 2.5rem;
    border: 1px solid var(--clr-accent);
    color: var(--clr-accent);
    font-weight: var(--fw-medium);
    font-size: clamp(0.85rem, 2vw, 0.95rem);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: var(--transition-smooth);
}

.btn-outline:hover {
    background-color: var(--clr-accent);
    color: #111111;
}

/* =========================================
   Navigation
   ========================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 0;
    z-index: 1000;
    transition: var(--transition-smooth);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
    padding: 1rem 0;
}

.navbar.scrolled .logo,
.navbar.scrolled .nav-links a,
.navbar.scrolled .nav-tagline,
.navbar.scrolled .hamburger span {
    color: var(--clr-secondary);
}

.navbar.scrolled .hamburger span {
    background-color: var(--clr-secondary);
}

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

.brand {
    display: flex;
    flex-direction: column;
}

.logo {
    font-size: 1.5rem;
    font-weight: var(--fw-regular);
    color: var(--clr-secondary);
    margin-bottom: 0;
}

.nav-tagline {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.8);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--clr-secondary);
    font-size: 0.9rem;
    font-weight: var(--fw-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
}

.nav-links a:not(.btn-nav):hover {
    color: var(--clr-accent);
}

.nav-links a.active {
    color: var(--clr-accent);
}

.btn-nav {
    padding: 0.8rem 2rem;
    background-color: var(--clr-accent);
    color: #111111 !important;
    border-radius: 2px;
}

.btn-nav:hover {
    background-color: var(--clr-accent-hover);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--clr-secondary);
    margin: 5px 0;
    transition: var(--transition-smooth);
}

@media (max-width: 992px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        height: 100dvh; /* Dynamic viewport height for mobile browsers */
        background-color: var(--clr-primary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        transition: var(--transition-smooth);
        overflow-y: auto;
    }

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

    .nav-links a {
        color: var(--clr-secondary);
        font-size: 1.2rem;
    }

    .hamburger {
        display: block;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 5px);
        background-color: var(--clr-secondary);
    }
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    .hamburger.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -5px);
        background-color: var(--clr-secondary);
    }
    
    .logo, .nav-tagline { color: var(--clr-secondary); }
    .hamburger span { background-color: var(--clr-secondary); }
}

/* =========================================
   SECTION 1: HERO (Slideshow + Zoom)
   ========================================= */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    transform-origin: center center; /* For GSAP Scale */
}

.hero-slides {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-slides .slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
}

.hero-slides .slide.active {
    opacity: 1;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(10, 10, 10, 0.4), rgba(10, 10, 10, 0.75));
}

.hero-content {
    color: var(--clr-secondary);
    z-index: 1;
    max-width: 900px;
    text-align: center;
}

.hero-tagline {
    display: block;
    font-size: clamp(0.75rem, 2vw, 0.9rem);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--clr-accent);
    margin-bottom: 1.5rem;
    visibility: hidden;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 5vw, 5rem);
    color: var(--clr-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.1;
    font-weight: var(--fw-bold);
    visibility: hidden;
}

.hero-content p {
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3rem;
    visibility: hidden;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    visibility: hidden;
}

@media (max-width: 992px) {
    .hero {
        height: auto !important;
        min-height: auto;
        padding-top: 200px;
        padding-bottom: 100px;
        align-items: flex-start;
    }
}

@media (max-width: 768px) {
    .hero {
        padding-top: 180px;
        padding-bottom: 80px;
    }
    .hero-slides .slide {
        background-position: center 30%;
    }
    .hero-content {
        padding: 0 1rem;
    }
}

@media (max-width: 576px) {
    .hero {
        padding-top: 140px;
        padding-bottom: 60px;
    }
    .hero-cta {
        flex-direction: column;
    }
}

/* =========================================
   SECTION 2: RECENT PROJECTS (Horizontal Strip)
   ========================================= */
.horizontal-carousel-wrapper {
    width: 100%;
    overflow: hidden;
    padding: clamp(3rem, 6vw, 6rem) 0;
}

.horizontal-swiper {
    width: 100%;
    padding: 0 5%;
}

.horizontal-swiper .swiper-wrapper {
    transition-timing-function: linear !important; /* Smooth continuous scroll */
}

.project-card {
    width: clamp(240px, 40vw, 350px) !important; /* Responsive card width */
    height: auto;
    background: transparent;
    border-radius: 0;
}

.project-img {
    width: 100%;
    aspect-ratio: 4/5; /* Portrait Ratio */
    overflow: hidden;
    position: relative;
}

.project-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.project-card:hover .project-img img {
    transform: scale(1.03);
}

.project-info {
    padding: 1rem 0;
}

.project-info h3 {
    font-size: clamp(0.95rem, 2vw, 1.15rem);
    margin-bottom: 0.2rem;
    color: var(--clr-secondary);
}

.project-info span {
    font-size: clamp(0.75rem, 1.5vw, 0.85rem);
    color: var(--clr-text-secondary);
}

/* =========================================
   SECTION 3: PORTFOLIO PREVIEW (Masonry Grid)
   ========================================= */
.masonry-grid {
    columns: 3 280px; /* Responsive CSS Columns for Masonry */
    column-gap: 1rem;
}

.masonry-item {
    break-inside: avoid;
    margin-bottom: 1rem;
    overflow: hidden;
    position: relative;
}

.masonry-item img {
    width: 100%;
    display: block;
    border-radius: 2px;
    transition: transform 0.6s ease;
}

.masonry-item:hover img {
    transform: scale(1.05);
}

@media (max-width: 576px) {
    .masonry-grid {
        columns: 2 140px;
        column-gap: 0.75rem;
    }
    .masonry-item {
        margin-bottom: 0.75rem;
    }
}

/* =========================================
   SECTION 4: SERVICES
   ========================================= */

/* Visibility Utilities */
.d-none-desktop { display: none; }

.services-interactive {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    align-items: center;
    margin-top: 3rem;
}

.services-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.service-btn {
    background: transparent;
    border: none;
    text-align: left;
    padding: 1.5rem 0;
    font-size: 1.5rem;
    font-family: var(--font-primary);
    color: #555;
    cursor: pointer;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    transition: var(--transition-smooth);
    position: relative;
    outline: none;
}

.service-btn:hover {
    color: var(--clr-secondary);
}

.service-btn.active {
    color: var(--clr-secondary);
    font-weight: var(--fw-semibold);
    border-bottom-color: var(--clr-accent);
}

.service-btn.active::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 2px;
    background-color: var(--clr-accent);
}

.services-preview {
    position: relative;
    width: 100%;
    aspect-ratio: 3/4;
    max-height: 75vh;
    overflow: hidden;
    background-color: var(--clr-surface);
    border-radius: 4px;
}

.service-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    visibility: hidden;
    transform: scale(1.05);
    transition: all 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

.service-img.active {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}

/* Tablet: Keep two-column layout, only adjust sizes */
@media (max-width: 992px) {
    .services-interactive {
        gap: 2rem;
    }
    .services-preview {
        max-height: 65vh;
    }
    .service-btn {
        font-size: 1.25rem;
        padding: 1rem 0;
    }
}

/* Mobile: Switch to carousel layout */
@media (max-width: 768px) {
    .d-none-mobile { display: none !important; }
    .d-none-desktop { display: block; }

    .services-mobile-carousel {
        width: 100%;
        margin-top: 2rem;
    }

    .mobile-service-card {
        position: relative;
        width: 100%;
        aspect-ratio: 3/4;
        overflow: hidden;
        border-radius: 4px;
    }

    .mobile-service-card img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .service-label-overlay {
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        padding: 4rem 1.5rem 1.5rem;
        background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
        color: var(--clr-secondary);
        font-size: 1.25rem;
        font-weight: var(--fw-semibold);
        letter-spacing: 0.05em;
    }

    .services-nav-controls {
        display: flex;
        justify-content: center;
        gap: 1.5rem;
        margin-top: 2rem;
    }

    .services-nav-btn {
        width: 45px;
        height: 45px;
        border-radius: 50%;
        border: 1px solid rgba(255,255,255,0.3);
        color: var(--clr-secondary);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        cursor: pointer;
        transition: var(--transition-smooth);
    }

    .services-nav-btn:hover {
        background-color: var(--clr-accent);
        border-color: var(--clr-accent);
        color: #111111;
    }
}

/* =========================================
   SECTION 5: CLIENT TESTIMONIALS (GLASS STACK)
   ========================================= */
.testimonials-swiper {
    width: 100%;
    max-width: min(550px, 90vw);
    margin: 0 auto;
    padding: 2rem 0; /* Accommodate Swiper cards depth */
}

.testimonial-glass-card {
    background: rgba(21, 21, 21, 0.85); /* #151515 base with slight transparency */
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(213,175,54,0.15);
    border-radius: clamp(20px, 4vw, 32px);
    padding: clamp(2rem, 4vw, 3.5rem) clamp(1.5rem, 3vw, 3rem);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.client-info h4 {
    margin-bottom: 0.4rem;
    font-size: clamp(1.05rem, 2.5vw, 1.25rem);
    color: var(--clr-secondary);
}

.client-info span {
    font-size: clamp(0.8rem, 1.8vw, 0.9rem);
    color: var(--clr-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: var(--fw-medium);
}

.review {
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    font-style: italic;
    line-height: 1.8;
    color: var(--clr-text-secondary);
    margin: 0;
}

/* =========================================
   SECTION 6: CONTACT
   ========================================= */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 5vw, 5rem);
    align-items: center;
}

.contact-info h2 {
    font-size: clamp(1.8rem, 4vw, 3.5rem);
    margin-bottom: 1.5rem;
}

.detail-item {
    margin-bottom: 1.5rem;
}

.detail-item strong {
    display: block;
    color: var(--clr-secondary);
    margin-bottom: 0.3rem;
    font-weight: var(--fw-semibold);
}

.detail-item a {
    color: var(--clr-accent);
    word-break: break-word;
}
.detail-item a:hover {
    color: var(--clr-accent-hover);
}

.map-placeholder {
    width: 100%;
    height: auto;
    background: var(--clr-surface);
    overflow: hidden;
}

@media (max-width: 992px) {
    .contact-container {
        grid-template-columns: 1fr;
    }
}

/* =========================================
   SECTION 7: FOOTER
   ========================================= */
.footer {
    background: var(--clr-neutral);
    color: var(--clr-secondary);
    padding: clamp(3rem, 6vw, 6rem) 0 2rem;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.footer h4 {
    color: var(--clr-secondary);
    margin-bottom: 1.5rem;
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    letter-spacing: 0.05em;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: clamp(2rem, 4vw, 4rem);
    margin-bottom: clamp(2rem, 4vw, 4rem);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: var(--fw-regular);
    color: var(--clr-secondary);
    letter-spacing: 0;
    display: inline-block;
    margin-bottom: 1.5rem;
}

.footer p {
    color: var(--clr-text-secondary);
    font-size: clamp(0.85rem, 1.8vw, 0.95rem);
}

.footer ul li {
    margin-bottom: 0.8rem;
}

.footer ul a {
    color: var(--clr-text-secondary);
    font-size: clamp(0.85rem, 1.8vw, 0.95rem);
}

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

.footer-bottom {
    text-align: center;
    border-top: 1px solid var(--clr-elevated);
    padding-top: 2rem;
}

.footer-bottom p {
    margin: 0;
    font-size: clamp(0.75rem, 1.5vw, 0.85rem);
    color: var(--clr-text-secondary);
}

@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}
@media (max-width: 576px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}