/* ==========================================================================
   HAŞEM MERMER - LUXURY ARCHITECTURAL DESIGN SYSTEM & STYLESHEET
   Typography: Marcellus & Tenor Sans (Delicate & Graceful) + Outfit / Plus Jakarta Sans
   ========================================================================== */

/* 1. CSS VARIABLES & DESIGN TOKENS
   ========================================================================== */
:root {
    /* Color Palette - Stone & Gold Luxury */
    --clr-bg: #FBFBF9;                 /* Natural pristine stone white */
    --clr-bg-alt: #F3EFEA;             /* Warm travertine beige */
    --clr-card-bg: #FFFFFF;            /* Pure marble white card */
    --clr-dark: #111215;               /* Deep obsidian / Black granite */
    --clr-dark-surface: #17181C;       /* Dark card surface */
    --clr-dark-elevated: #202227;      /* Dark floating elements */
    
    --clr-text-main: #2C2D30;          /* Crisp high-contrast body text */
    --clr-text-muted: #6E7075;         /* Elegant secondary text */
    --clr-text-light: #EAEBED;         /* Light text for dark sections */
    --clr-text-faint: #9EA0A6;         /* Low priority subtle text */
    
    /* Warm Bronze & Antique Gold Accents */
    --clr-accent: #C5A059;             /* Signature Architectural Gold */
    --clr-accent-gold: #D6B26A;        /* Bright highlight gold */
    --clr-accent-dark: #9D7B37;        /* Deep gold for hover states */
    --clr-accent-light: #F7F3EB;       /* Soft gold tint background */
    --clr-accent-glow: rgba(197, 160, 89, 0.22);

    /* Borders & Dividers */
    --clr-border-light: rgba(0, 0, 0, 0.08);
    --clr-border-dark: rgba(255, 255, 255, 0.09);
    --clr-border-gold: rgba(197, 160, 89, 0.3);

    /* Typography - Delicate & Refined */
    --font-heading: 'Marcellus', 'Tenor Sans', 'Italiana', Georgia, serif;
    --font-body: 'Outfit', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Transitions & Physics */
    --transition-smooth: all 0.35s cubic-bezier(0.25, 1, 0.5, 1);
    --transition-fast: all 0.2s ease;

    /* Multi-layered Soft Shadows */
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.03);
    --shadow-soft: 0 16px 36px rgba(18, 19, 21, 0.05);
    --shadow-hover: 0 24px 48px rgba(18, 19, 21, 0.08), 0 0 1px rgba(197, 160, 89, 0.2);
    --shadow-dark: 0 20px 45px rgba(0, 0, 0, 0.4);

    /* Layout Spacing */
    --container-max-w: 1320px;
    --section-space: 110px;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 8px;
    --radius-pill: 999px;
}

/* 2. BASE RESET & ACCESSIBILITY
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    background-color: var(--clr-bg);
    color: var(--clr-text-main);
    font-family: var(--font-body);
    font-weight: 300;
    line-height: 1.75;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* 3. TYPOGRAPHY & UTILITIES (DELICATE & GRACEFUL)
   ========================================================================== */
h1, h2, h3, h4, h5, h6, .font-heading {
    font-family: var(--font-heading);
    font-weight: 400;
    line-height: 1.25;
    letter-spacing: 0.04em;
    color: var(--clr-dark);
}

p {
    font-family: var(--font-body);
    font-weight: 300;
}

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

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

button {
    font-family: inherit;
    cursor: pointer;
}

.container {
    width: 90%;
    max-width: var(--container-max-w);
    margin: 0 auto;
}

.section-padding {
    padding-top: var(--section-space);
    padding-bottom: var(--section-space);
}

.bg-alt {
    background-color: var(--clr-bg-alt);
    position: relative;
}

.bg-dark {
    background-color: var(--clr-dark);
    color: var(--clr-text-light);
    position: relative;
}

.text-white { color: #FFFFFF !important; }
.text-gold { color: var(--clr-accent) !important; }
.text-muted { color: var(--clr-text-muted) !important; }

.italic-text {
    font-style: italic;
    font-weight: 400;
}

.grid-2-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.grid-4-col {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 36px;
}

.align-center {
    align-items: center;
}

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

/* Section Headers - Delicate Luxury Architecture */
.section-subtitle {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-body);
    font-size: 0.76rem;
    font-weight: 600;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--clr-accent);
    margin-bottom: 14px;
}

.section-subtitle::before {
    content: '';
    display: inline-block;
    width: 24px;
    height: 1px;
    background-color: var(--clr-accent);
}

.center-header .section-subtitle::before {
    display: none;
}

.section-title {
    font-size: clamp(2.1rem, 3.8vw, 3.2rem);
    color: var(--clr-dark);
    margin-bottom: 20px;
    letter-spacing: 0.03em;
}

.bg-dark .section-title {
    color: #FFFFFF;
}

.section-desc {
    font-size: 1.02rem;
    color: var(--clr-text-muted);
    max-width: 620px;
    line-height: 1.8;
    font-weight: 300;
}

.bg-dark .section-desc {
    color: rgba(255, 255, 255, 0.72);
}

.center-header {
    text-align: center;
    margin-bottom: 60px;
}

.center-header .section-desc {
    margin: 0 auto;
}

/* 4. BUTTONS & ACTIONS
   ========================================================================== */
.btn-bronze {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 34px;
    background: linear-gradient(135deg, var(--clr-accent) 0%, var(--clr-accent-dark) 100%);
    color: #FFFFFF;
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    border: 1px solid var(--clr-accent);
    border-radius: var(--radius-sm);
    cursor: pointer;
    overflow: hidden;
    transition: var(--transition-smooth);
    box-shadow: 0 6px 18px rgba(197, 160, 89, 0.22);
    z-index: 1;
}

.btn-bronze::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    transition: left 0.6s ease;
    z-index: -1;
}

.btn-bronze:hover {
    background: linear-gradient(135deg, var(--clr-accent-gold) 0%, var(--clr-accent) 100%);
    border-color: var(--clr-accent-gold);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(197, 160, 89, 0.32);
    color: #FFFFFF;
}

.btn-bronze:hover::before {
    left: 100%;
}

.btn-outline-light {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 34px;
    background-color: transparent;
    color: #FFFFFF;
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: var(--radius-sm);
    cursor: pointer;
    backdrop-filter: blur(4px);
    transition: var(--transition-smooth);
}

.btn-outline-light:hover {
    border-color: #FFFFFF;
    background-color: rgba(255, 255, 255, 0.12);
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.btn-primary-sm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 22px;
    border: 1px solid var(--clr-dark);
    color: var(--clr-dark);
    font-family: var(--font-body);
    font-size: 0.74rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
}

.btn-primary-sm:hover {
    background-color: var(--clr-dark);
    color: #FFFFFF;
    transform: translateY(-1px);
}

.btn-sm {
    padding: 12px 24px;
    font-size: 0.76rem;
}

.full-width {
    width: 100%;
}

/* 5. SITE HEADER & NAVIGATION
   ========================================================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 24px 0;
    transition: var(--transition-smooth);
}

.site-header.scrolled {
    background-color: rgba(251, 251, 249, 0.95);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    padding: 14px 0;
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.05);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.header-container {
    width: 90%;
    max-width: var(--container-max-w);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-logo {
    display: flex;
    flex-direction: column;
    line-height: 1;
    text-decoration: none;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.85rem;
    font-weight: 400;
    letter-spacing: 0.16em;
    color: var(--clr-dark);
    transition: var(--transition-fast);
}

.logo-subtext {
    font-family: var(--font-body);
    font-size: 0.56rem;
    font-weight: 600;
    letter-spacing: 0.42em;
    color: var(--clr-accent);
    margin-top: 3px;
}

/* Header Transparent Mode on Top of Hero */
.site-header.hero-transparent .logo-text {
    color: #FFFFFF;
}

.site-header.hero-transparent .nav-link {
    color: rgba(255, 255, 255, 0.85);
}

.site-header.hero-transparent .nav-link:hover,
.site-header.hero-transparent .nav-link.active {
    color: #FFFFFF;
}

.site-header.hero-transparent .btn-primary-sm {
    border-color: rgba(255, 255, 255, 0.6);
    color: #FFFFFF;
}

.site-header.hero-transparent .btn-primary-sm:hover {
    background-color: #FFFFFF;
    color: var(--clr-dark);
}

.desktop-nav ul {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-link {
    font-size: 0.76rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    color: var(--clr-text-main);
    position: relative;
    padding: 6px 0;
    transition: var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0%;
    height: 1.5px;
    background-color: var(--clr-accent);
    transition: var(--transition-smooth);
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--clr-accent);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 18px;
}

/* Hamburger Toggle Button */
.mobile-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    width: 44px;
    height: 44px;
    padding: 10px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    border-radius: 4px;
    z-index: 2001;
}

.mobile-toggle .bar {
    display: block;
    width: 22px;
    height: 1.5px;
    background-color: var(--clr-dark);
    transition: var(--transition-smooth);
}

.site-header.hero-transparent .mobile-toggle .bar {
    background-color: #FFFFFF;
}

.site-header.scrolled .mobile-toggle .bar {
    background-color: var(--clr-dark);
}

/* Hamburger Open Animation */
.mobile-toggle.active .bar-1 {
    transform: translateY(6.5px) rotate(45deg);
    background-color: #FFFFFF !important;
}

.mobile-toggle.active .bar-2 {
    opacity: 0;
    transform: scale(0);
}

.mobile-toggle.active .bar-3 {
    transform: translateY(-6.5px) rotate(-45deg);
    background-color: #FFFFFF !important;
}

/* 6. MOBILE NAVIGATION DRAWER & BACKDROP (100% RELIABLE & VISIBLE)
   ========================================================================== */
.drawer-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(10, 11, 13, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1999;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.35s ease, visibility 0.35s ease;
}

.drawer-backdrop.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    width: 85%;
    max-width: 360px;
    height: 100vh;
    height: 100dvh;
    background-color: #121316;
    background-image: radial-gradient(circle at 100% 0%, rgba(197, 160, 89, 0.12) 0%, transparent 60%);
    border-left: 1px solid var(--clr-border-dark);
    z-index: 2000;
    transform: translateX(100%);
    transition: transform 0.38s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: -15px 0 40px rgba(0, 0, 0, 0.6);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.mobile-drawer.open {
    transform: translateX(0);
}

.drawer-inner {
    padding: 28px 24px;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-sizing: border-box;
}

.drawer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--clr-border-dark);
}

.drawer-header .logo-text {
    color: #FFFFFF;
    font-size: 1.5rem;
}

.drawer-close {
    position: relative;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--clr-border-dark);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.drawer-close span {
    position: absolute;
    width: 16px;
    height: 1.5px;
    background-color: #FFFFFF;
}

.drawer-close span:nth-child(1) { transform: rotate(45deg); }
.drawer-close span:nth-child(2) { transform: rotate(-45deg); }

.drawer-close:hover {
    background-color: var(--clr-accent);
    border-color: var(--clr-accent);
}

.drawer-body {
    flex-grow: 1;
    margin: 20px 0;
}

.drawer-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.drawer-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 10px 12px;
    color: #FFFFFF;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.drawer-link .nav-num {
    font-family: var(--font-body);
    font-size: 0.74rem;
    font-weight: 600;
    color: var(--clr-accent);
    letter-spacing: 0.05em;
    opacity: 0.85;
}

.drawer-link:hover,
.drawer-link:active {
    background-color: rgba(197, 160, 89, 0.1);
    color: var(--clr-accent-gold);
    transform: translateX(4px);
}

.drawer-footer {
    border-top: 1px solid var(--clr-border-dark);
    padding-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.drawer-contacts {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.drawer-contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.75);
    transition: var(--transition-fast);
}

.drawer-contact-item svg {
    color: var(--clr-accent);
}

.drawer-contact-item:hover {
    color: #FFFFFF;
}

.drawer-cta {
    margin-top: 4px;
    text-align: center;
}

/* 7. HERO SECTION
   ========================================================================== */
.hero-section {
    position: relative;
    height: 100vh;
    min-height: 650px;
    display: flex;
    align-items: center;
    color: #FFFFFF;
    overflow: hidden;
    background-color: var(--clr-dark);
}

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

.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.04);
    animation: heroZoom 14s ease-out infinite alternate;
}

@keyframes heroZoom {
    0% { transform: scale(1.02); }
    100% { transform: scale(1.07); }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        180deg, 
        rgba(17, 18, 21, 0.5) 0%, 
        rgba(17, 18, 21, 0.62) 50%, 
        rgba(17, 18, 21, 0.88) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 860px;
    margin-top: 30px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 0.74rem;
    font-weight: 600;
    letter-spacing: 0.32em;
    color: var(--clr-accent);
    margin-bottom: 22px;
    text-transform: uppercase;
}

.hero-tag::before {
    content: '';
    display: inline-block;
    width: 30px;
    height: 1px;
    background-color: var(--clr-accent);
}

.hero-title {
    font-size: clamp(2.8rem, 5.6vw, 4.8rem);
    line-height: 1.1;
    margin-bottom: 26px;
    color: #FFFFFF;
    font-weight: 400;
    letter-spacing: 0.03em;
}

.hero-description {
    font-size: clamp(1rem, 1.4vw, 1.15rem);
    color: rgba(255, 255, 255, 0.88);
    max-width: 640px;
    margin-bottom: 42px;
    font-weight: 300;
    line-height: 1.8;
}

.hero-btn-group {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.scroll-text {
    font-size: 0.64rem;
    letter-spacing: 0.28em;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 600;
}

.scroll-line {
    width: 1px;
    height: 38px;
    background: linear-gradient(180deg, var(--clr-accent) 0%, rgba(255, 255, 255, 0) 100%);
    animation: scrollAnimation 2s infinite;
}

@keyframes scrollAnimation {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    50.1% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* 8. INTRO / EDITORIAL SECTION
   ========================================================================== */
.intro-text-block .paragraph-lead {
    font-family: var(--font-heading);
    font-size: 1.55rem;
    line-height: 1.45;
    color: var(--clr-dark);
    margin-bottom: 22px;
    font-weight: 400;
}

.intro-text-block .paragraph-body {
    color: var(--clr-text-muted);
    margin-bottom: 30px;
    line-height: 1.8;
}

.intro-highlights {
    display: flex;
    flex-direction: column;
    gap: 16px;
    border-top: 1px solid var(--clr-border-light);
    padding-top: 28px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.highlight-num {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 400;
    color: var(--clr-accent);
    min-width: 32px;
}

.highlight-txt {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--clr-dark);
    letter-spacing: 0.01em;
}

.intro-image-grid {
    position: relative;
    padding-bottom: 50px;
}

.img-frame {
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.img-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.frame-main {
    width: 86%;
    height: 480px;
}

.frame-sub {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 52%;
    height: 280px;
    border: 8px solid var(--clr-bg);
    box-shadow: var(--shadow-hover);
}

.intro-image-grid:hover .frame-main img {
    transform: scale(1.04);
}

.intro-image-grid:hover .frame-sub img {
    transform: scale(1.05);
}

/* 9. PRODUCTS SECTION
   ========================================================================== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.product-card {
    background-color: var(--clr-card-bg);
    border: 1px solid var(--clr-border-light);
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.product-card:hover {
    transform: translateY(-7px);
    box-shadow: var(--shadow-hover);
    border-color: var(--clr-border-gold);
}

.card-img-wrap {
    position: relative;
    height: 270px;
    overflow: hidden;
    background-color: #E8E5DF;
}

.card-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s cubic-bezier(0.25, 1, 0.5, 1);
}

.product-card:hover .card-img-wrap img {
    transform: scale(1.07);
}

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0) 50%, rgba(18, 19, 21, 0.45) 100%);
}

.card-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    background-color: rgba(17, 18, 21, 0.85);
    color: var(--clr-accent-gold);
    font-size: 0.64rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    padding: 5px 12px;
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
}

.card-body {
    padding: 28px 26px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.product-title {
    font-size: 1.45rem;
    color: var(--clr-dark);
    margin-bottom: 10px;
    letter-spacing: 0.05em;
    font-weight: 400;
}

.product-desc {
    font-size: 0.9rem;
    color: var(--clr-text-muted);
    margin-bottom: 22px;
    flex-grow: 1;
    line-height: 1.7;
    font-weight: 300;
}

.card-link {
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    color: var(--clr-dark);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-transform: uppercase;
    transition: var(--transition-fast);
}

.card-link .arrow {
    transition: transform 0.3s ease;
    color: var(--clr-accent);
}

.product-card:hover .card-link {
    color: var(--clr-accent);
}

.product-card:hover .card-link .arrow {
    transform: translateX(6px);
}

/* 10. STATEMENT PARALLAX BANNER
   ========================================================================== */
.parallax-banner {
    position: relative;
    padding: 130px 0;
    text-align: center;
    color: #FFFFFF;
    overflow: hidden;
    background-color: var(--clr-dark);
}

.parallax-bg {
    position: absolute;
    top: -20%;
    left: 0;
    width: 100%;
    height: 140%;
    background-size: cover;
    background-position: center;
    z-index: 1;
}

.parallax-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(17, 18, 21, 0.75) 0%, rgba(17, 18, 21, 0.9) 100%);
    z-index: 1;
}

.statement-quote {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 4vw, 3.2rem);
    line-height: 1.3;
    max-width: 920px;
    margin: 0 auto 24px auto;
    font-weight: 400;
    letter-spacing: 0.02em;
}

.quote-author {
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.28em;
    color: var(--clr-accent);
    text-transform: uppercase;
}

/* 11. MARBLE EXPERIENCE INTERACTIVE SHOWCASE
   ========================================================================== */
.experience-wrapper {
    margin-top: 40px;
}

.exp-tabs {
    display: flex;
    justify-content: center;
    gap: 14px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.exp-tab-btn {
    padding: 13px 26px;
    background: var(--clr-card-bg);
    border: 1px solid var(--clr-border-light);
    font-family: var(--font-heading);
    font-size: 0.86rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    color: var(--clr-text-main);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
}

.exp-tab-btn:hover,
.exp-tab-btn.active {
    background-color: var(--clr-dark);
    color: #FFFFFF;
    border-color: var(--clr-dark);
    box-shadow: 0 8px 20px rgba(17, 18, 21, 0.15);
    transform: translateY(-2px);
}

.exp-tab-btn.active {
    border-color: var(--clr-accent);
}

.exp-display-box {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    background-color: var(--clr-card-bg);
    border: 1px solid var(--clr-border-light);
    box-shadow: var(--shadow-soft);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.exp-image-col {
    height: 480px;
    overflow: hidden;
    background-color: #E8E5DF;
}

.exp-image-col img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.35s ease, transform 0.6s ease;
}

.exp-info-col {
    padding: 48px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.exp-tag {
    font-size: 0.74rem;
    font-weight: 600;
    letter-spacing: 0.22em;
    color: var(--clr-accent);
    margin-bottom: 12px;
}

.exp-title {
    font-size: 2.1rem;
    color: var(--clr-dark);
    margin-bottom: 16px;
    letter-spacing: 0.04em;
    font-weight: 400;
}

.exp-desc {
    font-size: 0.94rem;
    color: var(--clr-text-muted);
    margin-bottom: 28px;
    line-height: 1.75;
    font-weight: 300;
}

.exp-specs {
    border-top: 1px solid var(--clr-border-light);
    border-bottom: 1px solid var(--clr-border-light);
    padding: 20px 0;
    margin-bottom: 30px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.86rem;
}

.spec-label {
    font-weight: 500;
    color: var(--clr-dark);
}

.spec-value {
    color: var(--clr-text-muted);
    text-align: right;
    font-weight: 300;
}

/* 12. PROJECTS MASONRY PORTFOLIO
   ========================================================================== */
.masonry-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.project-card {
    position: relative;
    overflow: hidden;
    height: 420px;
    background-color: var(--clr-dark-surface);
    border: 1px solid var(--clr-border-dark);
    border-radius: var(--radius-sm);
}

.project-card.card-large {
    grid-row: span 2;
    height: 100%;
    min-height: 560px;
}

.project-card.card-wide {
    grid-column: span 2;
    height: 380px;
}

.project-img-holder {
    width: 100%;
    height: 100%;
}

.project-img-holder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.85;
    transition: transform 0.8s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.4s ease;
}

.project-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 36px;
    background: linear-gradient(180deg, rgba(17, 18, 21, 0) 0%, rgba(17, 18, 21, 0.94) 100%);
    z-index: 2;
    transform: translateY(10px);
    transition: var(--transition-smooth);
}

.project-cat {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.22em;
    color: var(--clr-accent);
    margin-bottom: 8px;
    display: block;
}

.project-name {
    font-size: 1.7rem;
    color: #FFFFFF;
    margin-bottom: 8px;
    letter-spacing: 0.03em;
    font-weight: 400;
}

.project-detail {
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.75);
    opacity: 0;
    height: 0;
    overflow: hidden;
    transition: var(--transition-smooth);
    line-height: 1.6;
    font-weight: 300;
}

.project-card:hover .project-img-holder img {
    transform: scale(1.06);
    opacity: 1;
}

.project-card:hover .project-info {
    transform: translateY(0);
}

.project-card:hover .project-detail {
    opacity: 1;
    height: auto;
    margin-top: 8px;
}

/* 13. PROCESS / ARCHITECTURAL TIMELINE
   ========================================================================== */
.architectural-timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    position: relative;
    margin-top: 60px;
}

.architectural-timeline::before {
    content: '';
    position: absolute;
    top: 36px;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--clr-border-light);
    z-index: 1;
}

.timeline-step {
    position: relative;
    z-index: 2;
}

.step-num {
    width: 70px;
    height: 70px;
    background-color: var(--clr-bg);
    border: 1px solid var(--clr-accent);
    color: var(--clr-accent);
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 400;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 26px;
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(197, 160, 89, 0.12);
}

.timeline-step:hover .step-num {
    background-color: var(--clr-accent);
    color: #FFFFFF;
    transform: scale(1.06);
    box-shadow: 0 8px 24px rgba(197, 160, 89, 0.32);
}

.step-title {
    font-size: 1.08rem;
    color: var(--clr-dark);
    margin-bottom: 12px;
    letter-spacing: 0.06em;
    font-weight: 400;
}

.step-desc {
    font-size: 0.88rem;
    color: var(--clr-text-muted);
    line-height: 1.7;
    font-weight: 300;
}

/* 14. ABOUT & STATS SECTION
   ========================================================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.stat-card {
    background-color: var(--clr-card-bg);
    padding: 38px 30px;
    border: 1px solid var(--clr-border-light);
    border-radius: var(--radius-sm);
    text-align: center;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
}

.stat-card:hover {
    border-color: var(--clr-border-gold);
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 3.4rem;
    font-weight: 400;
    color: var(--clr-dark);
    line-height: 1;
    letter-spacing: -0.01em;
}

.stat-plus {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    color: var(--clr-accent);
    font-weight: 400;
    margin-left: 2px;
}

.stat-label {
    display: block;
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    color: var(--clr-text-muted);
    text-transform: uppercase;
    margin-top: 12px;
}

/* 15. ADVANTAGES SECTION
   ========================================================================== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}

.adv-card {
    background-color: var(--clr-card-bg);
    padding: 42px 30px;
    border: 1px solid var(--clr-border-light);
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
}

.adv-card:hover {
    border-color: var(--clr-accent);
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.adv-icon {
    color: var(--clr-accent);
    margin-bottom: 22px;
    display: inline-block;
    transition: transform 0.4s ease;
}

.adv-card:hover .adv-icon {
    transform: scale(1.08);
}

.adv-title {
    font-size: 1.15rem;
    color: var(--clr-dark);
    margin-bottom: 12px;
    letter-spacing: 0.03em;
    font-weight: 400;
}

.adv-desc {
    font-size: 0.88rem;
    color: var(--clr-text-muted);
    line-height: 1.7;
    font-weight: 300;
}

/* 16. PARTNERS LOGOS SECTION
   ========================================================================== */
.partners-section {
    padding: 55px 0;
    border-top: 1px solid var(--clr-border-light);
    border-bottom: 1px solid var(--clr-border-light);
    background-color: #FFFFFF;
    text-align: center;
}

.partners-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.28em;
    color: var(--clr-text-muted);
    margin-bottom: 32px;
    text-transform: uppercase;
}

.partners-logos {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: 36px;
}

.partner-logo {
    font-family: var(--font-heading);
    font-size: 1.18rem;
    font-weight: 400;
    letter-spacing: 0.22em;
    color: #9C9EA3;
    transition: var(--transition-fast);
}

.partner-logo:hover {
    color: var(--clr-dark);
    transform: scale(1.04);
}

/* 17. CTA BANNER SECTION
   ========================================================================== */
.cta-banner {
    position: relative;
    padding: 120px 0;
    color: #FFFFFF;
    text-align: center;
    overflow: hidden;
    background-color: var(--clr-dark);
}

.cta-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    z-index: 1;
}

.cta-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(17, 18, 21, 0.8) 0%, rgba(17, 18, 21, 0.92) 100%);
    z-index: 1;
}

.cta-content {
    max-width: 760px;
}

.cta-title {
    font-size: clamp(2.1rem, 3.8vw, 3.2rem);
    margin-bottom: 20px;
    color: #FFFFFF;
    letter-spacing: 0.02em;
    font-weight: 400;
}

.cta-desc {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.82);
    margin-bottom: 42px;
    font-weight: 300;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* 18. CONTACT SECTION & FORM
   ========================================================================== */
.info-items {
    margin-top: 36px;
    display: flex;
    flex-direction: column;
    gap: 26px;
}

.info-label {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.22em;
    color: var(--clr-accent);
    display: block;
    margin-bottom: 6px;
}

.info-val {
    font-size: 1.02rem;
    color: var(--clr-dark);
    font-weight: 400;
    line-height: 1.5;
}

.info-val a:hover {
    color: var(--clr-accent);
}

.contact-form-wrap {
    background-color: var(--clr-card-bg);
    padding: 50px 45px;
    border: 1px solid var(--clr-border-light);
    box-shadow: var(--shadow-soft);
    border-radius: var(--radius-sm);
}

.form-title {
    font-size: 1.75rem;
    color: var(--clr-dark);
    margin-bottom: 26px;
    letter-spacing: 0.02em;
    font-weight: 400;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group label {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--clr-dark);
    letter-spacing: 0.02em;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    min-height: 48px;
    padding: 13px 18px;
    border: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: var(--radius-sm);
    background-color: #FAF9F6;
    font-family: var(--font-body);
    font-size: 0.92rem;
    color: var(--clr-text-main);
    transition: var(--transition-fast);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.form-group textarea {
    min-height: 110px;
    resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--clr-accent);
    background-color: #FFFFFF;
    box-shadow: 0 0 0 3px var(--clr-accent-glow);
}

.form-feedback {
    margin-top: 12px;
    font-size: 0.88rem;
    padding: 14px;
    border-radius: var(--radius-sm);
    display: none;
}

.form-feedback.success {
    display: block;
    background-color: #EBF7EE;
    color: #206E35;
    border: 1px solid #B8E4C3;
}

/* 19. FOOTER
   ========================================================================== */
.site-footer {
    background-color: var(--clr-dark);
    color: var(--clr-text-light);
    padding-top: 90px;
    padding-bottom: 50px;
    border-top: 1px solid var(--clr-border-dark);
}

.footer-top {
    border-bottom: 1px solid var(--clr-border-dark);
    padding-bottom: 60px;
}

.footer-about {
    font-size: 0.9rem;
    color: var(--clr-text-muted);
    margin-top: 20px;
    line-height: 1.75;
    font-weight: 300;
}

.footer-title {
    font-family: var(--font-heading);
    font-size: 0.88rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    color: #FFFFFF;
    margin-bottom: 24px;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--clr-text-muted);
    transition: var(--transition-fast);
    font-weight: 300;
}

.footer-links a:hover {
    color: var(--clr-accent-gold);
    transform: translateX(4px);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.social-links a {
    font-size: 0.9rem;
    color: var(--clr-text-muted);
    transition: var(--transition-fast);
    font-weight: 300;
}

.social-links a:hover {
    color: var(--clr-accent-gold);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 36px;
    font-size: 0.82rem;
    color: var(--clr-text-muted);
}

.footer-credit {
    font-family: var(--font-heading);
    letter-spacing: 0.1em;
    color: var(--clr-accent);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 25px;
    right: 25px;
    width: 44px;
    height: 44px;
    background-color: var(--clr-card-bg);
    border: 1px solid var(--clr-border-gold);
    color: var(--clr-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transform: translateY(15px);
    transition: var(--transition-smooth);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--clr-accent);
    color: #FFFFFF;
    border-color: var(--clr-accent);
}

/* 20. SCROLL REVEAL & ANIMATIONS
   ========================================================================== */
.scroll-reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.85s cubic-bezier(0.25, 1, 0.5, 1), transform 0.85s cubic-bezier(0.25, 1, 0.5, 1);
    will-change: opacity, transform;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.3s; }
.delay-3 { transition-delay: 0.45s; }

.fade-in-up {
    animation: fadeInUp 1s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

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

/* 21. RESPONSIVE BREAKPOINTS & MOBILE REFINEMENTS
   ========================================================================== */

/* Laptop & Medium Screens */
@media (max-width: 1024px) {
    :root {
        --section-space: 85px;
    }

    .product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .architectural-timeline {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
    }

    .architectural-timeline::before {
        display: none;
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 22px;
    }

    .exp-display-box {
        grid-template-columns: 1fr;
    }

    .exp-image-col {
        height: 340px;
    }

    .exp-info-col {
        padding: 36px;
    }

    .grid-4-col {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
    }
}

/* Tablet Screens (≤ 768px) */
@media (max-width: 768px) {
    :root {
        --section-space: 70px;
    }

    .desktop-nav,
    .header-actions .btn-primary-sm {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .grid-2-col {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .masonry-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .project-card,
    .project-card.card-large,
    .project-card.card-wide {
        grid-column: span 1;
        grid-row: span 1;
        height: 340px;
    }

    /* Keep project captions permanently legible on touch devices */
    .project-info {
        transform: translateY(0);
        padding: 24px 20px;
        background: linear-gradient(180deg, rgba(17, 18, 21, 0) 0%, rgba(17, 18, 21, 0.95) 80%);
    }

    .project-detail {
        opacity: 0.9;
        height: auto;
        margin-top: 6px;
        font-size: 0.82rem;
    }

    /* Intro Editorial Grid on Mobile */
    .intro-image-grid {
        height: 340px;
        padding-bottom: 0;
    }

    .frame-main {
        width: 100%;
        height: 100%;
    }

    .frame-sub {
        display: none;
    }

    /* Marble Experience on Mobile (Horizontal Scrollable Tabs) */
    .exp-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 12px;
        -webkit-overflow-scrolling: touch;
        scroll-snap-type: x mandatory;
        gap: 10px;
    }

    .exp-tab-btn {
        flex: 0 0 auto;
        scroll-snap-align: start;
        padding: 11px 20px;
        font-size: 0.78rem;
    }

    .exp-info-col {
        padding: 28px 20px;
    }

    .exp-title {
        font-size: 1.7rem;
    }

    .spec-item {
        flex-direction: column;
        gap: 4px;
    }

    .spec-value {
        text-align: left;
    }

    /* Process Timeline on Mobile (Sleek Vertical Flow) */
    .architectural-timeline {
        grid-template-columns: 1fr;
        gap: 26px;
        position: relative;
        padding-left: 20px;
        margin-top: 40px;
    }

    .architectural-timeline::before {
        display: block;
        width: 2px;
        height: calc(100% - 40px);
        top: 20px;
        left: 54px;
        background: linear-gradient(180deg, var(--clr-accent) 0%, rgba(197, 160, 89, 0.2) 100%);
    }

    .timeline-step {
        display: flex;
        gap: 20px;
        align-items: flex-start;
    }

    .step-num {
        flex-shrink: 0;
        width: 52px;
        height: 52px;
        font-size: 1.25rem;
        margin-bottom: 0;
    }

    .step-content {
        flex: 1;
        padding-top: 4px;
    }

    /* Contact Form on Mobile */
    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-form-wrap {
        padding: 32px 22px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 14px;
        text-align: center;
    }
}

/* Small Smartphone Screens (≤ 480px) */
@media (max-width: 480px) {
    :root {
        --section-space: 58px;
    }

    .container {
        width: 92%;
    }

    .product-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .card-img-wrap {
        height: 230px;
    }

    .card-body {
        padding: 22px 18px;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 14px;
    }

    .stat-card {
        padding: 24px 14px;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .stat-plus {
        font-size: 1.8rem;
    }

    .stat-label {
        font-size: 0.72rem;
    }

    .hero-btn-group {
        flex-direction: column;
        width: 100%;
        gap: 12px;
    }

    .hero-btn-group a {
        width: 100%;
    }

    .cta-buttons {
        flex-direction: column;
        width: 100%;
        gap: 12px;
    }

    .cta-buttons a {
        width: 100%;
    }

    .grid-4-col {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .partners-logos {
        gap: 24px;
    }

    .partner-logo {
        font-size: 1.05rem;
    }
}