/* ===== CSS VARIABLES ===== */
:root {
    /* Colors */
    --accent-primary: #FFFFFF;
    --accent-secondary: #A1A1AA;
    --neutral-950: #0A0A0A;
    --neutral-900: #141414;
    --neutral-300: #E4E4E7;
    --neutral-500: #71717A;
    --success: #22C55E;
    --error: #EF4444;
    
    /* Typography */
    --font-heading: 'Cormorant Garamond', serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    --space-xl: 48px;
    --space-xxl: 96px;
    --space-xxxl: 128px;
    
    /* Layout */
    --max-width: 1400px;
    --border-radius: 0px;
    
    /* Transitions */
    --transition-fast: 300ms ease-in-out;
    --transition-normal: 400ms ease-in-out;
    --transition-slow: 600ms ease-in-out;
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--neutral-950);
    color: var(--neutral-300);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 3.813rem;
    font-weight: 600;
}

h2 {
    font-size: 3.063rem;
    font-weight: 600;
}

h3 {
    font-size: 1.938rem;
    font-weight: 700;
    line-height: 1.4;
    letter-spacing: -0.01em;
}

p {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: var(--space-sm);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ===== NAVIGATION ===== */
.nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 48px;
    background: rgba(10, 10, 10, 0.7);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--neutral-900);
    z-index: 1000;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand h1 {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--neutral-300);
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-link {
    color: var(--neutral-300);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link.active {
    color: var(--accent-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--neutral-300);
    transition: var(--transition-fast);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-top: 48px;
}

.projects-content,
.about-content,
.contact-content,
.project-content {
    margin-top: 48px;
    min-height: calc(100vh - 48px - 64px);
}

/* ===== HERO CAROUSEL ===== */
.hero-section {
    position: relative;
    height: calc(100vh - 48px);
    overflow: hidden;
}

.carousel-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.carousel-slide.active {
    opacity: 1;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(20, 20, 20, 0.5);
    border: none;
    color: var(--accent-primary);
    width: 64px;
    height: 64px;
    border-radius: 50%;
    font-size: 2rem;
    cursor: pointer;
    transition: background var(--transition-fast);
    opacity: 0;
    z-index: 10;
}

.carousel-container:hover .carousel-btn {
    opacity: 1;
}

.carousel-btn:hover {
    background: rgba(20, 20, 20, 0.8);
}

.carousel-btn-prev {
    left: var(--space-lg);
}

.carousel-btn-next {
    right: var(--space-lg);
}

.carousel-indicators {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--space-sm);
}

.indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--neutral-500);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.indicator.active {
    background: var(--accent-primary);
}

/* ===== INTRO SECTION ===== */
.intro-section {
    padding: var(--space-xxl) 0;
    text-align: center;
}

.intro-title {
    font-size: 3.063rem;
    margin-bottom: var(--space-lg);
    color: var(--accent-primary);
}

.intro-text {
    font-size: 1.25rem;
    max-width: 720px;
    margin: 0 auto;
    color: var(--neutral-300);
}

/* ===== PROJECTS GRID ===== */
.projects-section {
    padding: var(--space-xxl) 0;
}

.section-title {
    text-align: center;
    font-size: 3.063rem;
    margin-bottom: var(--space-sm);
    color: var(--accent-primary);
}

.section-subtitle {
    text-align: center;
    font-size: 1.25rem;
    color: var(--neutral-500);
    margin-bottom: var(--space-xxl);
}

.projects-grid {
    display: grid;
    /* Force two columns on desktop for a wider tile and to match 480x270 thumbnails */
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    max-width: var(--max-width);
    margin: 0 auto;
}

.project-item {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    /* 480 x 270 -> 16:9 aspect ratio to avoid cropping */
    aspect-ratio: 16 / 9;
    background: var(--neutral-900);
}

.project-item img {
    width: 100%;
    height: 100%;
    /* Show the whole image, letterbox if necessary, do not crop */
    object-fit: contain;
    object-position: center;
    background-color: var(--neutral-900);
    display: block;
    transition: transform var(--transition-normal);
}

.project-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-lg);
    background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,0.6) 100%);
    transform: translateY(100%); /* Completely hide descriptions until hover */
    transition: transform var(--transition-normal);
}

.project-title {
    display: none; /* Hide project titles while keeping them in DOM for functionality */
    font-size: 1.5rem;
    color: var(--neutral-300);
    margin-bottom: var(--space-xs);
    transition: color var(--transition-fast);
}

.project-description {
    font-size: 1rem;
    color: #ffffff; /* Bright white text */
    margin: 0;
}

.project-item:hover .project-overlay {
    transform: translateY(0);
}

.project-item:hover .project-title {
    color: var(--accent-primary);
}

.project-item:hover img {
    transform: scale(1.03);
}

/* ===== PROJECT DETAIL PAGE ===== */
.project-header {
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
    background: var(--neutral-900);
    margin-bottom: var(--space-lg);
}

.back-link {
    display: inline-block;
    color: var(--neutral-500);
    text-decoration: none;
    margin-bottom: var(--space-md);
    transition: color var(--transition-fast);
}

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

.project-name {
    font-size: 3.063rem;
    color: var(--accent-primary);
    margin-bottom: var(--space-sm);
}

.project-description {
    font-size: 1.25rem;
    color: #ffffff; /* Bright white text */
    max-width: 600px;
    margin: 0 auto;
}

.project-carousel-section {
    padding: 0 var(--space-lg) var(--space-xl);
}

.project-carousel-container {
    position: relative;
    max-width: var(--max-width);
    margin: 0 auto;
    height: 70vh;
    overflow: hidden;
    background: var(--neutral-900);
}

.carousel-wrapper {
    display: flex;
    height: 100%;
    transition: transform var(--transition-slow);
}

.project-slide {
    min-width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-slide img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.project-indicators {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--space-sm);
}

.carousel-controls {
    text-align: center;
    padding: var(--space-lg) 0;
}

.auto-play-btn {
    background: var(--neutral-900);
    border: 1px solid var(--neutral-500);
    color: var(--neutral-300);
    padding: var(--space-sm) var(--space-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-body);
}

.auto-play-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* ===== ABOUT PAGE ===== */
.about-section {
    padding: var(--space-xxl) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-xxl);
    margin-bottom: var(--space-xxl);
    align-items: start;
}

.about-image {
    position: sticky;
    top: 80px;
}

.about-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.about-subtitle {
    color: var(--accent-primary);
    margin-bottom: var(--space-sm);
    margin-top: var(--space-xl);
}

.about-subtitle:first-child {
    margin-top: 0;
}

.about-description {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.services-list {
    list-style: none;
    margin: var(--space-md) 0;
}

.services-list li {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--neutral-900);
    font-size: 1.125rem;
}

.credentials {
    margin-top: var(--space-xxl);
}

.credentials-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.credential-item {
    background: var(--neutral-900);
    padding: var(--space-lg);
    border: 1px solid var(--neutral-900);
}

.credential-item h4 {
    color: var(--accent-primary);
    margin-bottom: var(--space-xs);
}

/* ===== CONTACT PAGE ===== */
.contact-section {
    padding: var(--space-xxl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xxl);
    margin-top: var(--space-xxl);
}

.contact-subtitle {
    color: var(--accent-primary);
    margin-bottom: var(--space-lg);
}

.contact-item {
    margin-bottom: var(--space-xl);
}

.contact-item h4 {
    color: var(--neutral-300);
    margin-bottom: var(--space-xs);
}

.contact-item a {
    color: var(--neutral-300);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-item a:hover {
    color: var(--accent-primary);
}

.social-icons {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-sm);
}

.social-link {
    color: var(--neutral-500);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* ===== CONTACT FORM ===== */
.contact-form-element {
    background: var(--neutral-900);
    padding: var(--space-xl);
    border: 1px solid var(--neutral-900);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
    color: var(--neutral-300);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-sm);
    background: var(--neutral-950);
    border: 1px solid var(--neutral-900);
    color: var(--neutral-300);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.submit-btn {
    background: var(--accent-primary);
    color: var(--neutral-950);
    border: none;
    padding: var(--space-sm) var(--space-xl);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition-fast);
    font-family: var(--font-body);
}

.submit-btn:hover {
    background: var(--neutral-300);
}

/* ===== COPYRIGHT FOOTER ===== */
.copyright-footer {
    background: var(--neutral-950);
    border-top: 1px solid var(--neutral-900);
    padding: var(--space-lg) 0;
    margin-top: auto;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright-text {
    color: var(--neutral-500);
    font-size: 0.875rem;
    margin: 0;
}

.contact-email {
    color: var(--neutral-500);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.contact-email:hover {
    color: var(--neutral-300);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: var(--space-sm);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .about-image {
        position: static;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

@media (max-width: 768px) {
    :root {
        --space-xxl: 64px;
        --space-xxxl: 96px;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--neutral-900);
        flex-direction: column;
        padding: var(--space-md);
        gap: var(--space-sm);
        box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
        z-index: 1000;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .intro-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .project-carousel-container {
        height: 60vh;
    }
    
    .carousel-btn {
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
    }
    
    .footer-container {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
    
    .credentials-list {
        grid-template-columns: 1fr;
    }
}

/* ===== ADVANCED CAROUSEL CONTROLS ===== */
.carousel-controls {
    display: flex;
    justify-content: center;
    margin-top: var(--space-lg);
}

.auto-play-btn {
    padding: 12px 24px;
    background-color: var(--accent-primary);
    color: var(--neutral-950);
    border: none;
    border-radius: 6px;
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.auto-play-btn:hover {
    background-color: var(--neutral-300);
    transform: translateY(-1px);
}

.auto-play-btn.paused {
    background-color: var(--neutral-600);
    color: var(--accent-primary);
}

.auto-play-btn.paused:hover {
    background-color: var(--neutral-500);
}

/* ===== SEARCH INPUT STYLING ===== */
.projects-search-input {
    transition: border-color 0.3s ease;
}

.projects-search-input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

/* ===== PLACEHOLDER STYLING ===== */
.placeholder-image {
    width: 100%;
    height: 100%;
    background-color: var(--neutral-700);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: var(--space-md);
}

.placeholder-image p {
    color: var(--neutral-400);
    font-family: var(--font-primary);
    font-size: 1.1rem;
    font-weight: 400;
}

/* ===== IMAGE PROTECTION VISUAL CUES ===== */
img {
    /* Ensure consistent cursor behavior */
    cursor: default;
}

/* ===== ENHANCED CAROUSEL RESPONSIVE ===== */
@media (max-width: 768px) {
    .carousel-controls {
        margin-top: var(--space-md);
    }
    
    .auto-play-btn {
        padding: 10px 20px;
        font-size: 0.8rem;
    }
    
    .project-carousel-container {
        height: 50vh;
    }
}