/* Fonts */
@font-face {
    font-family: 'Borda Light';
    src: url('fonts/Borda Light.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

/* Variables */
:root {
    --color-bg: #050505; /* Rich Black */
    --color-bg-alt: #121212; /* Deep Charcoal */
    --color-text: #ffffff;
    --color-text-muted: #b0b0b0;
    --color-primary: #116dff; /* Electric Blue */
    --color-secondary: #1a1a1a;
    --color-border: #333333;
    --color-overlay: rgba(0, 0, 0, 0.5);

    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-logo: 'Borda Light', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    --spacing-xxl: 12rem;

    --container-width: 1400px;
    --border-radius: 0px; /* Sharp edges for "architectural" feel */
    
    --transition-speed: 0.4s;
    
    /* Texture */
    --pattern-dot: radial-gradient(#333 1px, transparent 1px);
}

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

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: var(--pattern-dot);
    background-size: 40px 40px; /* Subtle grid pattern */
    background-attachment: fixed;
}

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

ul {
    list-style: none;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 300; /* Light weight for luxury */
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

h1 {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 200;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

h2 {
    font-size: clamp(2rem, 5vw, 3.6rem);
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-md);
    font-weight: 300;
    color: var(--color-text-muted);
}

.lead {
    font-size: 1.25rem;
    font-weight: 400;
    line-height: 1.8;
    max-width: 800px;
    color: var(--color-text);
}

/* Layout Utilities */
.container {
    width: 90%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--spacing-md);
    align-items: start;
}

.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

@media (max-width: 992px) {
    .col-4, .col-5, .col-7, .col-8 {
        grid-column: span 12;
    }
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: var(--spacing-md) 0;
    z-index: 1000;
    background-color: rgba(5, 5, 5, 0.85); /* Dark transparent background */
    backdrop-filter: blur(10px);
    transition: padding var(--transition-speed) ease, background-color var(--transition-speed) ease;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header.scrolled {
    padding: var(--spacing-sm) 0;
    background-color: rgba(5, 5, 5, 0.95);
    box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}

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

.logo {
    font-family: var(--font-logo);
    font-size: 1.8rem;
    font-weight: normal;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text);
}

.nav__list {
    display: flex;
    gap: var(--spacing-md);
}

.nav__link {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    color: var(--color-text-muted);
    white-space: nowrap;
}

.nav__link:hover {
    color: var(--color-text);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-primary);
    transition: width var(--transition-speed) ease;
}

.nav__link:hover::after {
    width: 100%;
}

.nav__link--cta {
    color: var(--color-primary);
    font-weight: 500;
}

.nav__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
}

.nav__toggle-line {
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: transform 0.3s ease;
}

@media (max-width: 1200px) {
    .nav__list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-bg);
        flex-direction: column;
        padding: var(--spacing-md);
        text-align: center;
        box-shadow: 0 10px 20px rgba(0,0,0,0.5);
        border-bottom: 1px solid var(--color-border);
    }

    .nav__list.active {
        display: flex;
    }

    .nav__toggle {
        display: flex;
    }
    
    .nav__toggle.active .nav__toggle-line:first-child {
        transform: rotate(45deg) translate(5px, 6px);
    }

    .nav__toggle.active .nav__toggle-line:last-child {
        transform: rotate(-45deg) translate(5px, -6px);
    }
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: var(--spacing-xl);
    overflow: hidden;
}

/* Radial Gradient Background for Hero */
.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, #0a192f 0%, #050505 70%);
    z-index: 0;
    opacity: 0.6;
}

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

.hero__overlay {
    /* Removed old overlay, using pseudo-element for gradient */
    display: none; 
}

.hero__title {
    margin-bottom: var(--spacing-md);
    text-shadow: 0 0 20px rgba(0,0,0,0.5);
    line-height: 1.15;
}

.hero__prefix,
.hero__fixed,
.hero__suffix {
    display: block;
}

.hero__prefix {
    font-size: 0.5em;
    font-weight: 300;
    color: var(--color-text-muted);
    transition: opacity 0.4s ease, transform 0.4s ease;
    will-change: opacity, transform;
    letter-spacing: 0.1em;
}

.hero__fixed {
    color: var(--color-text);
}

.hero__suffix {
    color: var(--color-primary);
    transition: opacity 0.4s ease, transform 0.4s ease;
    will-change: opacity, transform;
}

.hero__prefix.cycling-fade-out,
.hero__suffix.cycling-fade-out {
    opacity: 0;
    transform: translateY(-12px);
    pointer-events: none;
}

.hero__subtitle {
    font-size: 1.2rem;
    max-width: 600px;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-muted);
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.9rem;
    border: 1px solid var(--color-text);
    transition: all var(--transition-speed) ease;
    cursor: pointer;
    background: transparent;
    color: var(--color-text);
}

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

.btn--primary:hover {
    background-color: var(--color-primary);
    color: #fff;
    box-shadow: 0 0 20px rgba(17, 109, 255, 0.4); /* Glow effect */
}

/* Sections General */
.section {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
    position: relative;
}

/* Alternating Backgrounds */
.section:nth-child(even) {
    background-color: var(--color-bg-alt);
}

.section__header {
    margin-bottom: var(--spacing-lg);
    overflow: hidden;          /* Clip oversized decorative title to column boundary */
    position: relative;        /* Establish stacking context for the column */
}

.section__content {
    align-self: start;         /* Pin right-column text firmly to column top */
}

.section__number {
    display: block;
    font-family: var(--font-heading);
    font-size: 4rem;
    color: #222; /* Dark grey for subtle numbering */
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.section__title {
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Expertise */
.service-card {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    background-color: rgba(255, 255, 255, 0.02);
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    border-color: var(--color-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.service-card__title {
    position: relative;
    padding-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.service-card__title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--color-primary);
}

.service-card__desc {
    color: var(--color-text-muted);
}

/* Works */
.works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

@media (max-width: 768px) {
    .works-grid {
        grid-template-columns: 1fr;
    }
}

.work-item {
    position: relative;
    overflow: hidden;
    group: hover;
}

.work-item__image img {
    width: 100%;
    height: auto;
    transition: transform 0.6s ease, filter 0.6s ease;
    filter: grayscale(100%) brightness(0.8); /* Darker grayscale */
}

.work-item:hover .work-item__image img {
    transform: scale(1.05);
    filter: grayscale(0%) brightness(1);
}

.work-item__content {
    padding-top: var(--spacing-md);
}

.work-item__title {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.work-item__category {
    color: var(--color-primary);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
}

/* Contact */
.contact__form-wrapper {
    background-color: var(--color-bg-alt);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-heading);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
}

.form-input {
    width: 100%;
    padding: 1rem;
    border: none;
    border-bottom: 1px solid var(--color-border);
    background: transparent;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text);
    transition: border-color var(--transition-speed) ease;
}

.form-input:focus {
    outline: none;
    border-bottom-color: var(--color-primary);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.form-status {
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    min-height: 1.25rem;
}

.form-status--success {
    color: #4caf89;
}

.form-status--error {
    color: #e05c5c;
}

.contact__address {
    font-style: normal;
    margin-top: var(--spacing-md);
    line-height: 2;
    color: var(--color-text-muted);
}

.contact__address a {
    color: var(--color-primary);
}

/* Footer */
.footer {
    background-color: #000;
    color: var(--color-text-muted);
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.footer__logo {
    font-family: var(--font-logo);
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.2em;
    color: var(--color-text);
}

.footer__copyright {
    font-size: 0.8rem;
    opacity: 0.5;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }
.delay-3 { transition-delay: 0.6s; }
.delay-4 { transition-delay: 0.8s; }