/* ==========================================================================
   1. GLOBAL ARCHITECTURAL STYLE & VARIABLE SCHEMA
   ========================================================================== */
* { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
}

:root { 
    --primary: #191f24;       /* Slate Obsidian - Gives a strong industrial base */
    --accent: #c5a880;        /* Muted Raw Brass / Architectural Gold */
    --bg-light: #fdfdfc;      /* Crisp architectural gallery white */
    --bg-alt: #f4f5f6;        /* Structural concrete/stone grey tint */
    --text-dark: #242b30;     /* Rich charcoal for deep contrast readability */
    --text-muted: #626c75;    /* Civil engineering Blueprint steel-grey */
    --card-bg: #ffffff;
    --transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

body { 
    background-color: var(--bg-light); 
    color: var(--text-dark); 
    font-family: 'Plus Jakarta Sans', sans-serif;
    line-height: 1.7; 
    -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   2. HEADER & ARCHITECTURAL NAVIGATION
   ========================================================================== */
header { 
    background-color: rgba(253, 253, 252, 0.95); 
    backdrop-filter: blur(12px);
    padding: 1.5rem 2rem; 
    position: sticky; 
    top: 0; 
    z-index: 1000; 
    border-bottom: 1px solid rgba(25, 31, 36, 0.06);
}

nav { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    max-width: 1300px; 
    margin: 0 auto; 
}

.logo { 
    color: var(--primary); 
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem; 
    font-weight: 700; 
    text-decoration: none; 
    letter-spacing: -0.5px;
    text-transform: uppercase;
}

.logo-accent {
    color: var(--accent);
}

.nav-links { 
    list-style: none; 
    display: flex; 
    align-items: center;
    gap: 3rem; 
}

.nav-links a { 
    color: var(--text-muted); 
    text-decoration: none; 
    font-weight: 500; 
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
}

.nav-links a:hover, 
.nav-links .active { 
    color: var(--primary); 
}

.btn-nav {
    border: 1px solid var(--primary);
    padding: 0.6rem 1.5rem;
    font-size: 0.8rem !important;
}

.btn-nav:hover {
    background-color: var(--primary);
    color: white !important;
}

/* ==========================================================================
   3. RE-IMAGINED HERO LAYOUT (SPLIT-SCREEN STRUCTURAL GRAPHIC)
   ========================================================================== */
.hero-split { 
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    min-height: 85vh;
    background-color: var(--bg-alt);
}

.hero-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 4rem 6rem 4rem 4rem;
    max-width: 800px;
    margin-left: auto;
}

.hero-subtitle {
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
    display: block;
}

.hero-split h1 { 
    font-family: 'Playfair Display', serif;
    font-size: 4.2rem; 
    color: var(--primary);
    font-weight: 500;
    line-height: 1.15;
    margin-bottom: 1.5rem; 
    letter-spacing: -1.5px;
}

.hero-split p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
}

/* Structural Buttons */
.btn { 
    background-color: var(--primary); 
    color: white; 
    padding: 1.1rem 2.8rem; 
    text-decoration: none; 
    font-weight: 600; 
    font-size: 0.85rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    display: inline-block; 
    transition: var(--transition);
    border: 1px solid var(--primary);
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--primary);
    border: 1px solid rgba(25, 31, 36, 0.2);
}

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

.btn-full {
    width: 100%;
    text-align: center;
    cursor: pointer;
}

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

/* ==========================================================================
   4. MODULAR SECTIONS & SERVICES GRID
   ========================================================================== */
.container { 
    max-width: 1300px; 
    margin: 0 auto; 
    padding: 7.5rem 2rem; 
}

.section-header { 
    text-align: center; 
    max-width: 750px; 
    margin: 0 auto 5rem auto; 
}

.section-header h2 { 
    font-family: 'Playfair Display', serif;
    font-size: 3rem; 
    color: var(--primary); 
    margin-bottom: 1rem; 
}

.header-line {
    width: 60px;
    height: 2px;
    background-color: var(--accent);
    margin: 0 auto 1.5rem auto;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Clean Services Configuration */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.service-card {
    background: var(--card-bg);
    padding: 3.5rem 2.5rem;
    border-top: 3px solid var(--primary);
    box-shadow: 0 15px 40px rgba(0,0,0,0.02);
    transition: var(--transition);
}

.service-card:hover {
    border-top-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 25px 50px rgba(0,0,0,0.05);
}

.service-number {
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    color: rgba(197, 168, 128, 0.4);
    display: block;
    margin-bottom: 1rem;
    font-weight: 600;
}

.service-card h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ==========================================================================
   5. ASYMMETRIC CORPORATE VALUE RUNWAY
   ========================================================================== */
.feature-asymmetric {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    background-color: var(--primary);
    color: white;
    align-items: center;
}

.feature-image img {
    width: 100%;
    height: 100%;
    min-height: 600px;
    object-fit: cover;
    display: block;
}

.feature-text {
    padding: 6rem;
}

.feature-text h2 {
    font-family: 'Playfair Display', serif;
    font-size: 2.8rem;
    margin-bottom: 2rem;
    line-height: 1.2;
}

.feature-text p {
    color: #a4b0ba;
    font-size: 1.05rem;
    margin-bottom: 2rem;
}

.accent-quote {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-size: 1.5rem;
    color: var(--accent);
    border-left: 2px solid var(--accent);
    padding-left: 1.5rem;
    margin: 2rem 0;
}

.stat-row {
    display: flex;
    gap: 4rem;
    margin-top: 3rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 2rem;
}

.stat-box strong {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    color: var(--accent);
    display: block;
}

.stat-box span {
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
    color: #a4b0ba;
}

/* ==========================================================================
   6. ARCHITECTURAL PORTFOLIO EXTRUSION
   ========================================================================== */
.portfolio-filter {
    text-align: center;
    margin-bottom: 3.5rem;
}

.portfolio-filter span {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-right: 1rem;
}

.filter-btn {
    background: none;
    border: none;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    margin: 0 0.75rem;
    padding-bottom: 0.25rem;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
}

.filter-btn.active, .filter-btn:hover {
    color: var(--primary);
    border-bottom-color: var(--accent);
}

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

.portfolio-item {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
    background: var(--card-bg);
    align-items: center;
}

.portfolio-item:nth-child(even) {
    direction: rtl;
}

.portfolio-item:nth-child(even) .portfolio-meta {
    direction: ltr;
}

.portfolio-item img {
    width: 100%;
    height: 480px;
    object-fit: cover;
    transition: var(--transition);
}

.portfolio-item:hover img {
    transform: scale(1.01);
}

.portfolio-meta {
    padding: 1rem;
}

.proj-category {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    font-weight: 700;
    display: block;
    margin-bottom: 0.75rem;
}

.portfolio-meta h3 {
    font-family: 'Playfair Display', serif;
    font-size: 2.2rem;
    color: var(--primary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.portfolio-meta p {
    color: var(--text-muted);
    font-size: 1rem;
}

/* ==========================================================================
   7. INTAKE MODULE (CRM-READY ESTIMATE FORM)
   ========================================================================== */
.intake-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    background-color: var(--bg-alt);
    padding: 4.5rem;
}

.intake-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.intake-info h2 {
    font-family: 'Playfair Display', serif;
    font-size: 2.8rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.intake-info p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.contact-details p {
    margin-bottom: 0.5rem;
}

.intake-form-box {
    background: var(--card-bg);
    padding: 3rem;
    box-shadow: 0 30px 60px rgba(0,0,0,0.04);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.form-group input, 
.form-group select, 
.form-group textarea {
    width: 100%;
    padding: 1rem;
    font-family: inherit;
    font-size: 0.95rem;
    border: 1px solid rgba(25, 31, 36, 0.12);
    background: var(--bg-light);
    outline: none;
    transition: var(--transition);
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
    border-color: var(--accent);
    background: white;
}

/* ==========================================================================
   8. FOOTER & STRUCTURAL RESPONSIVENESS
   ========================================================================== */
footer {
    background-color: var(--primary);
    color: #7d8993;
    text-align: center;
    padding: 4rem 2rem;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    border-top: 1px solid rgba(255,255,255,0.05);
}

@media (max-width: 1024px) {
    .hero-split { grid-template-columns: 1fr; }
    .hero-visual { display: none; }
    .hero-content { padding: 6rem 2rem; margin: 0 auto; }
    .feature-asymmetric { grid-template-columns: 1fr; }
    .feature-image { display: none; }
    .portfolio-item { grid-template-columns: 1fr; gap: 1.5rem; }
    .portfolio-item:nth-child(even) { direction: ltr; }
    .portfolio-item img { height: 320px; }
    .intake-wrapper { grid-template-columns: 1fr; padding: 2rem; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-split h1 { font-size: 2.8rem; }
    .section-header h2 { font-size: 2.2rem; }
    .feature-text { padding: 3rem 1.5rem; }
    .feature-text h2 { font-size: 2rem; }
    .portfolio-meta h3 { font-size: 1.8rem; }
    .container { padding: 4.5rem 1.5rem; }
}