/* 
  High-End Architecture & Design Website Styles
  Theme: Dark Luxury / Professional Minimalism
*/

:root {
    /* Color Palette */
    --primary-bg: #121212;
    --secondary-bg: #1A1A1A;
    --accent-color: #B8926A;
    --accent-hover: #D4AF37;
    --text-heading: #FFFFFF;
    --text-body: #A0A0A0;
    --border-color: rgba(255, 255, 255, 0.1);
    --input-bg: transparent;

    /* Typography */
    --font-serif: "Didot", "Bodoni MT", "Cormorant Garamond", serif;
    --font-sans: "Inter", "Montserrat", "Helvetica Neue", sans-serif;
    
    /* Spacing & Sizing */
    --container-width: 1200px;
    --section-padding: 120px;
    --transition-base: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --header-height: 80px;
}

/* 1. Global Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--primary-bg);
    color: var(--text-body);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    color: var(--text-heading);
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

h1 { font-size: clamp(3rem, 8vw, 6rem); }
h2 { font-size: clamp(2rem, 5vw, 3.5rem); }
h3 { font-size: 1.75rem; }

p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    letter-spacing: 0.02em;
}

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

ul { list-style: none; }

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

/* 2. Layout Components */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: var(--section-padding) 0;
}

/* 3. Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 4rem;
    transition: var(--transition-base);
}

.header.scrolled {
    background: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(10px);
    height: 70px;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--text-heading);
    letter-spacing: 2px;
}

.nav-links {
    display: flex;
    gap: 3rem;
}

.nav-links a {
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    color: var(--text-heading);
}

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

/* 4. Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    cursor: pointer;
    transition: var(--transition-base);
    border: 1px solid transparent;
}

.btn-ghost {
    border-color: var(--text-heading);
    color: var(--text-heading);
}

.btn-ghost:hover {
    background: var(--text-heading);
    color: var(--primary-bg);
}

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

.btn-accent:hover {
    background: var(--accent-hover);
    transform: translateY(-3px);
}

.btn-inquire {
    padding: 0.6rem 1.5rem;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
}

.btn-inquire:hover {
    background: var(--accent-color);
    color: var(--text-heading);
}

/* 5. Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(rgba(0,0,0,0.4), rgba(0,0,0,0.4)), url('hero-bg.jpg') center/cover no-repeat;
    position: relative;
}

.hero-content {
    max-width: 900px;
}

.hero-subtitle {
    text-transform: uppercase;
    letter-spacing: 0.5em;
    color: var(--accent-color);
    margin-bottom: 2rem;
    display: block;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    font-size: 0.7rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
}

/* 6. Cards & Grids */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.card {
    background: var(--secondary-bg);
    padding: 3rem;
    transition: var(--transition-base);
    border: 1px solid var(--border-color);
}

.card:hover {
    border-color: var(--accent-color);
    transform: translateY(-10px);
}

.card-icon {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.portfolio-grid {
    display: flex;
    overflow-x: auto;
    gap: 20px;
    padding-bottom: 40px;
    scrollbar-width: none;
}

.portfolio-item {
    min-width: 450px;
    position: relative;
    overflow: hidden;
}

.portfolio-item img {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    transition: transform 0.8s ease;
}

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

/* 7. Forms */
.contact-form {
    max-width: 700px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 2.5rem;
    position: relative;
}

.form-input {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    color: var(--text-heading);
    font-family: var(--font-sans);
    outline: none;
    transition: var(--transition-base);
}

.form-input:focus {
    border-color: var(--accent-color);
}

/* 8. Footer */
.footer {
    background: var(--secondary-bg);
    padding: 80px 0 40px;
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 4rem;
    margin-bottom: 60px;
}

.footer-title {
    color: var(--text-heading);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 2rem;
}

.footer-links li {
    margin-bottom: 1rem;
}

.footer-links a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

.copyright {
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.8rem;
    color: #555;
}

/* 9. Utility Classes */
.text-accent { color: var(--accent-color); }
.italic { font-style: italic; }
.mt-2 { margin-top: 2rem; }
.mb-4 { margin-bottom: 4rem; }
.center { text-align: center; }

/* Overlapping Image Effect */
.overlap-container {
    position: relative;
    padding: 40px 0;
}

.image-large {
    width: 80%;
    margin-left: auto;
}

.image-small {
    position: absolute;
    width: 40%;
    bottom: -20px;
    left: 0;
    border: 10px solid var(--primary-bg);
}

/* Large Numbers for Process Section */
.step-number {
    font-family: var(--font-serif);
    font-size: 4rem;
    color: transparent;
    -webkit-text-stroke: 1px var(--accent-color);
    opacity: 0.5;
    margin-bottom: 1rem;
}

/* 10. Responsive Design */

/* Tablet (1024px) */
@media (max-width: 1024px) {
    .header { padding: 0 2rem; }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    :root { --section-padding: 80px; }
}

/* Mobile (768px) */
@media (max-width: 768px) {
    .nav-links { display: none; } /* Should be replaced by hamburger menu in JS */
    
    .grid-3 { grid-template-columns: 1fr; }
    
    .hero-content h1 { font-size: 3.5rem; }
    
    .portfolio-item { min-width: 100%; }
    
    .footer-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    
    .image-small { position: relative; width: 100%; left: 0; bottom: 0; border: none; margin-top: 20px; }
    .image-large { width: 100%; }
    
    .overlap-container { display: flex; flex-direction: column; }
}

/* 11. Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeInUp 1s forwards;
}

.scroll-indicator i {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {transform: translateY(0);}
    40% {transform: translateY(-10px);}
    60% {transform: translateY(-5px);}
}