/* CSS Variables for Contemporary Black & White Theme */
:root {
    /* Sophisticated Black & White Palette */
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted: #999999;
    --accent-primary: #ffffff;
    --accent-secondary: #000000;
    --accent-hover: #f5f5f5;
    --border-color: #2a2a2a;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --blur-bg: rgba(0, 0, 0, 0.9);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography - Minimal & Sophisticated */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Transitions - Minimal */
    --transition-fast: 0.1s ease;
    --transition-normal: 0.1s ease;
    --transition-slow: 0.1s ease;
}

/* Light Theme - Sophisticated White */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-tertiary: #f5f5f5;
    --text-primary: #000000;
    --text-secondary: #333333;
    --text-muted: #666666;
    --accent-primary: #000000;
    --accent-secondary: #ffffff;
    --accent-hover: #1a1a1a;
    --border-color: #e5e5e5;
    --shadow-color: rgba(0, 0, 0, 0.08);
    --blur-bg: rgba(255, 255, 255, 0.95);
}

/* Light Theme Hero Override */
[data-theme="light"] .heroOverlay {
    background: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] .heroTitle {
    text-shadow: 0 2px 4px rgba(255, 255, 255, 0.8);
}

[data-theme="light"] .heroDescription {
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
}

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

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header Styles - Minimal & Sophisticated */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
}

.brandLink {
    text-decoration: none;
    color: inherit;
}

.brandTitle {
    font-size: var(--font-size-xl);
    font-weight: 300;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.navMenu {
    display: flex;
    align-items: center;
}

.navList {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.navLink {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 300;
    font-size: var(--font-size-sm);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    position: relative;
}

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

.navActions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.themeToggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.themeToggle:hover {
    background-color: var(--bg-tertiary);
}

.themeIcon {
    font-size: var(--font-size-lg);
}

.navToggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    margin: 3px 0;
    border-radius: 2px;
}

.navClose {
    display: none;
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
    padding: var(--spacing-sm);
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
}

.closeIcon {
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    font-weight: 300;
    line-height: 1;
}

/* Hero Section - Sophisticated & Minimal */
.hero {
    height: 100vh;
    width: 100vw;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

.heroBackground {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.heroImage {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    filter: contrast(1.1);
}

.heroOverlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
}

.heroContent {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    padding: 0 var(--spacing-xl);
    color: var(--text-primary);
}

.heroTitle {
    font-size: var(--font-size-5xl);
    font-weight: 200;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7);
    letter-spacing: -0.02em;
}

.heroDescription {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.4;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.7);
    font-weight: 300;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.heroActions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Services Section - Minimal */
.services {
    padding: var(--spacing-2xl) 0;
    background-color: var(--bg-primary);
}

.servicesGrid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
}

.serviceCard {
    text-align: center;
    padding: var(--spacing-xs) var(--spacing-xs);
}

.serviceTitle {
    font-size: var(--font-size-lg);
    font-weight: 300;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.serviceDescription {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    font-weight: 300;
    letter-spacing: 0.02em;
}

/* Category Sections - Modern Alternating Layout */
.categorySection {
    padding: var(--spacing-2xl) 0;
    background-color: var(--bg-primary);
}

.sectionHeader {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.sectionTitle {
    font-size: var(--font-size-4xl);
    font-weight: 200;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.categoryLayout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    min-height: 500px;
}

/* Remove reverse layout as we're using standard alternating layout */

.categoryContent {
    padding: var(--spacing-xs);
}

.categoryTitle {
    font-size: var(--font-size-3xl);
    font-weight: 200;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.categoryDescription {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
    font-weight: 300;
    letter-spacing: 0.02em;
}

.categoryImage {
    height: 500px;
    overflow: hidden;
}

.categoryImage img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    filter: contrast(1.1);
}

/* Mini Masonry Layout for Category Sections */
.miniMasonry {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: var(--spacing-sm);
    height: 500px;
}

.miniMasonryItem {
    position: relative;
    overflow: hidden;
}

.miniMasonryItem:first-child {
    grid-column: 1 / 2;
    grid-row: 1 / 3;
}

.miniMasonryItem:nth-child(2) {
    grid-column: 2 / 3;
    grid-row: 1 / 2;
}

.miniMasonryItem:nth-child(3) {
    grid-column: 2 / 3;
    grid-row: 2 / 3;
}

.miniMasonryItem img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    filter: contrast(1.1);
    transition: transform var(--transition-normal);
}

.miniMasonryItem:hover img {
    transform: scale(1.05);
}

.modalTrigger {
    cursor: pointer;
}

/* Image Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
}

.modalContent {
    position: relative;
    margin: auto;
    padding: var(--spacing-lg);
    width: 90%;
    max-width: 1200px;
    height: 90%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: modalFadeIn 0.3s ease-out;
}

.modalContent img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: contrast(1.1);
}

.modalClose {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-lg);
    color: var(--text-primary);
    font-size: var(--font-size-4xl);
    font-weight: 300;
    cursor: pointer;
    z-index: 2001;
    line-height: 1;
    transition: opacity var(--transition-normal);
}

.modalClose:hover {
    opacity: 0.7;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Featured Section - Masonry Layout */
.featuredSection {
    padding: var(--spacing-2xl) 0;
    background-color: var(--bg-primary);
}

.masonryGrid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    grid-auto-rows: min-content;
}

.masonryItem {
    position: relative;
    overflow: hidden;
    break-inside: avoid;
}

.masonryItem img {
    width: 100%;
    height: auto;
    object-fit: cover;
    object-position: center;
    filter: contrast(1.1);
    display: block;
    cursor: pointer;
    transition: transform var(--transition-normal);
}

.masonryItem:hover img {
    transform: scale(1.02);
}

/* CTA Section */
.ctaSection {
    padding: var(--spacing-2xl) 0;
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

.ctaContent {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.ctaTitle {
    font-size: var(--font-size-3xl);
    font-weight: 200;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.ctaDescription {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
    font-weight: 300;
    letter-spacing: 0.02em;
}

.ctaActions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.contactContent {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
}

.contactDetails {
    margin-top: var(--spacing-xl);
}

.contactItem {
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-base);
}

.contactText {
    color: var(--text-secondary);
    font-weight: 300;
    letter-spacing: 0.02em;
}

/* Form Styles - Sophisticated */
.form {
    background-color: var(--bg-primary);
    padding: var(--spacing-xs);
    border: 1px solid var(--border-color);
}

.formGroup {
    margin-bottom: var(--spacing-lg);
}

.formInput {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 0;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-weight: 300;
    letter-spacing: 0.02em;
}

.formInput:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.formInput::placeholder {
    color: var(--text-muted);
    font-weight: 300;
}

.formTextarea {
    resize: vertical;
    min-height: 120px;
}

/* Button Styles - Sophisticated */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    border: 1px solid var(--accent-primary);
    border-radius: 0;
    font-size: var(--font-size-sm);
    font-weight: 300;
    text-decoration: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.btn:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.btnPrimary {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
}

.btnPrimary:hover {
    background-color: var(--bg-primary);
    color: var(--accent-primary);
}

.btn.btnPrimary:disabled {
    background-color: #666;
    color: #999;
    border-color: #666;
    cursor: not-allowed;
    opacity: 0.6;
    transform: none;
    box-shadow: none;
}

.btn.btnPrimary.btnFull:disabled {
    background-color: #666 !important;
    color: #999 !important;
    border-color: #666 !important;
    cursor: not-allowed !important;
    opacity: 0.6 !important;
    transform: none !important;
    box-shadow: none !important;
}

.btn.btnPrimary.btnFull:disabled:hover {
    background-color: #666 !important;
    color: #999 !important;
    border-color: #666 !important;
}

.btnSecondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btnSecondary:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-primary);
}

.btnSmall {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-xs);
}

.btnFull {
    width: 100%;
}

/* Footer - Minimal */
.footer {
    background-color: var(--bg-primary);
    padding: var(--spacing-2xl) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.footerContent {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footerTitle {
    font-size: var(--font-size-lg);
    font-weight: 300;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    letter-spacing: 0.02em;
}

.footerSubtitle {
    font-size: var(--font-size-base);
    font-weight: 300;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.footerDescription {
    color: var(--text-secondary);
    line-height: 1.6;
    font-weight: 300;
    letter-spacing: 0.02em;
}

.footerList {
    list-style: none;
}

.footerList li {
    margin-bottom: var(--spacing-sm);
}

.footerLink {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 300;
    letter-spacing: 0.02em;
}

.footerLink:hover {
    color: var(--accent-primary);
}

.footerText {
    color: var(--text-secondary);
    font-weight: 300;
    letter-spacing: 0.02em;
}

.footerBottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.footerCopyright {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    font-weight: 300;
    letter-spacing: 0.02em;
}

/* Architecture Section Specific Layouts */
.categoryLayoutDesktop {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    min-height: 500px;
}

.categoryLayoutMobile {
    display: none;
}

/* Mobile Responsiveness - Sophisticated */
@media (max-width: 768px) {
    .categoryLayoutDesktop {
        display: none;
    }
    
    .categoryLayoutMobile {
        display: grid;
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    .navMenu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background-color: var(--bg-primary);
        flex-direction: column;
        justify-content: center;
        transition: right var(--transition-normal);
        z-index: 999;
    }
    
    .navMenu.active {
        right: 0;
    }
    
    .navMenu.active .navClose {
        display: flex;
    }
    
    .navList {
        flex-direction: column;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .navLink {
        font-size: var(--font-size-lg);
    }
    
    .navToggle {
        display: flex;
    }
    
    .navToggle.active .hamburger:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .navToggle.active .hamburger:nth-child(2) {
        opacity: 0;
    }
    
    .navToggle.active .hamburger:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .heroTitle {
        font-size: var(--font-size-3xl);
    }
    
    .heroDescription {
        font-size: var(--font-size-base);
    }
    
    .heroActions {
        flex-direction: column;
        align-items: center;
    }
    
    .heroActions .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .servicesGrid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .categoryLayout {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .categoryImage {
        height: 300px;
    }
    
    .miniMasonry {
        height: 300px;
        gap: var(--spacing-xs);
    }
    
    .modalContent {
        width: 95%;
        height: 95%;
        padding: var(--spacing-md);
    }
    
    .modalClose {
        top: var(--spacing-sm);
        right: var(--spacing-md);
        font-size: var(--font-size-3xl);
    }
    
    .masonryGrid {
        grid-template-columns: 1fr;
    }
    
    .contactContent {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .ctaActions {
        flex-direction: column;
        align-items: center;
    }
    
    .ctaActions .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .footerContent {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .nav {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .heroTitle {
        font-size: var(--font-size-2xl);
    }
    
    .heroDescription {
        font-size: var(--font-size-sm);
    }
    
    .sectionTitle {
        font-size: var(--font-size-3xl);
    }
    
    .cardActions {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: stretch;
    }
}

/* Smooth scrolling for anchor links */
html {
    scroll-padding-top: 80px;
}

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

.fadeInUp {
    animation: fadeInUp 0.6s ease-out;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus styles for accessibility */
.btn:focus,
.formInput:focus,
.navLink:focus,
.themeToggle:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Math Captcha Styles */
.mathCaptcha {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-lg);
    background-color: var(--bg-primary);
}

.mathQuestion {
    text-align: center;
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
    font-weight: 300;
    color: var(--text-primary);
}

.mathQuestion span {
    display: inline-block;
}

#mathQuestion {
    font-weight: 400;
    color: var(--accent-primary);
    margin: 0 var(--spacing-xs);
}

.mathAnswer {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.mathAnswer input {
    width: 120px;
    text-align: center;
    font-size: var(--font-size-lg);
    font-weight: 400;
}

.mathAnswer .btnSmall {
    width: auto;
    min-width: 120px;
}

.mathCaptcha.hidden {
    display: none;
}

.captchaControls {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.btnSmall {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-sm);
    border: 1px solid var(--border-color);
    background-color: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.btnSmall:hover {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
    border-color: var(--accent-primary);
}

.captchaStatus {
    text-align: center;
    font-size: var(--font-size-sm);
    font-weight: 300;
    min-height: 20px;
}

.captchaStatus.success {
    color: #28a745;
}

.captchaStatus.error {
    color: #dc3545;
}

.captchaStatus.info {
    color: var(--text-secondary);
}

.formLabel {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 300;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Mobile Responsiveness for Captcha */
@media (max-width: 768px) {
    .captchaContainer {
        padding: var(--spacing-md);
    }
    
    .captchaControls {
        flex-direction: column;
        align-items: center;
    }
    
    .btnSmall {
        width: 100%;
        max-width: 150px;
    }
}