/* =========================================
   CSS Variables & Settings
   ========================================= */
:root {
    /* Colors */
    --color-bg: #fdfdfd;
    --color-text: #1d1d1f;
    --color-text-light: #86868b;
    --color-accent: #000000;
    --color-white: #ffffff;
    --color-gray-bg: #f5f5f7;
    --color-gray-border: #e5e5ea;
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 300;
    line-height: 1.2;
    color: var(--color-accent);
}

h1 {
    font-size: clamp(3rem, 6vw, 5.5rem);
    letter-spacing: -0.03em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3.5rem);
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.5rem;
    font-weight: 400;
}

p {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-bottom: 1rem;
}

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-padding {
    padding: 8rem 0;
}

.pt-0 {
    padding-top: 0;
}

.subtitle {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 2rem;
}

/* =========================================
   Utility Classes & UI Elements
   ========================================= */
.hover-link {
    position: relative;
    display: inline-block;
}

.hover-link::after {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 1px;
    bottom: 0;
    left: 0;
    background-color: currentColor;
    transform-origin: bottom right;
    transition: transform 0.4s cubic-bezier(0.86, 0, 0.07, 1);
}

.hover-link:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--color-accent);
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 1rem;
    border: 1px solid var(--color-accent);
    cursor: pointer;
    transition: var(--transition-smooth);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

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

/* Scroll Animation Classes */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }

/* =========================================
   Navigation
   ========================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 2rem 0;
    z-index: 100;
    transition: var(--transition-smooth);
    background: transparent;
}

.navbar.scrolled, .navbar-scrolled {
    padding: 1rem 0;
    background: rgba(253, 253, 253, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-border);
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: 0.1em;
}

.navbar:not(.scrolled):not(.navbar-scrolled) .logo,
.navbar:not(.scrolled):not(.navbar-scrolled) .nav-links a {
    color: var(--color-white);
}

.logo span {
    color: #86868b;
}

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

.nav-links a {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
}

.back-link {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* =========================================
   Hero Section
   ========================================= */
.hero {
    position: relative;
    height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 25%;
    transform: scale(1.05); /* For subtle parallax later */
}

.hero-bg .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.2);
}

.hero-content {
    text-align: center;
    color: var(--color-white);
    z-index: 10;
    padding: 0 1rem;
}

.hero-content h1 {
    color: var(--color-white);
    margin-bottom: 1.5rem;
}

.hero-content p {
    color: rgba(255,255,255,0.8);
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto;
    font-family: var(--font-heading);
    font-weight: 300;
}

.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--color-white);
    z-index: 10;
    opacity: 0.7;
    transition: var(--transition-fast);
}

.scroll-indicator:hover {
    opacity: 1;
}

.scroll-indicator span {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-top: 1rem;
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--color-white);
    border-radius: 13px;
    position: relative;
}

.wheel {
    width: 2px;
    height: 6px;
    background: var(--color-white);
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { top: 8px; opacity: 1; }
    100% { top: 24px; opacity: 0; }
}

/* =========================================
   About Section
   ========================================= */
.about {
    background-color: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: flex-start;
}

.about-text h2 {
    margin-bottom: 0.5rem;
}

.about-text p.subtitle {
    margin-bottom: 2rem;
    color: var(--color-text-light);
}

.about-text p {
    font-size: 1.2rem;
    color: var(--color-text);
}

.about-skills {
    background-color: var(--color-gray-bg);
    padding: 4rem;
    border-radius: 2px;
}

.about-skills h3 {
    margin-bottom: 2rem;
    font-family: var(--font-heading);
    font-size: 1.25rem;
}

.skills-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 1.25rem;
    color: var(--color-text);
    font-size: 1.05rem;
}

.skills-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6rem;
    width: 6px;
    height: 6px;
    background-color: var(--color-accent);
    border-radius: 50%;
}

/* =========================================
   Projects Section
   ========================================= */
.projects {
    background-color: var(--color-white);
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 5rem;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
}

.project-grid > :nth-child(even) {
    transform: none;
}

.project-card {
    display: block;
}

.project-image {
    position: relative;
    overflow: hidden;
    background-color: var(--color-gray-bg);
    aspect-ratio: 4/5;
    border-radius: 2px;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-smooth);
}

.project-overlay span {
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 300;
    letter-spacing: 0.05em;
    transform: translateY(20px);
    transition: var(--transition-smooth);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

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

.project-info {
    padding-top: 1.5rem;
}

.project-info h3 {
    margin-bottom: 0.5rem;
    transition: var(--transition-fast);
}

.project-card:hover .project-info h3 {
    opacity: 0.6;
}

.project-info p {
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0;
}

/* =========================================
   Contact Section
   ========================================= */
.contact {
    background-color: var(--color-gray-bg);
    margin-top: 4rem; /* Spacing for the staggered project grid */
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1000px;
    margin: 0 auto 4rem;
}

.info-item {
    margin-bottom: 2.5rem;
}

.info-item h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.info-item p, .info-item a {
    font-size: 1.25rem;
    color: var(--color-text);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem 0;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--color-gray-border);
    font-family: var(--font-body);
    font-size: 1.1rem;
    color: var(--color-text);
    transition: var(--transition-fast);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}



/* =========================================
   Footer
   ========================================= */
.footer {
    background-color: var(--color-bg);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-gray-border);
    margin-bottom: 2rem;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.1em;
}

.footer-logo span {
    color: var(--color-text-light);
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-light);
}

.footer-links a:hover {
    color: var(--color-text);
}

.footer-bottom {
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-light);
}

/* =========================================
   Detail Pages (Visual Only)
   ========================================= */
.detail-pure-visual {
    background-color: var(--color-bg);
}

.pure-visual-content {
    padding-top: 100px; /* Offset for navbar */
    display: flex;
    flex-direction: column;
    gap: 4rem;
    max-width: 1400px;
    margin: 0 auto;
    padding-bottom: 4rem;
}

.visual-section {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    background-color: var(--color-gray-bg);
    overflow: hidden;
}

.visual-section .full-visual {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.project-title-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    text-align: center;
    width: 100%;
    pointer-events: none;
}

.project-title-overlay h1 {
    color: var(--color-white);
    font-size: clamp(3rem, 8vw, 7rem);
    text-shadow: 0 10px 30px rgba(0,0,0,0.3);
    margin: 0;
}
/* =========================================
   Project Detail Page
   ========================================= */
.project-hero {
    position: relative;
    height: 80vh;
    min-height: 500px;
    display: flex;
    align-items: flex-end;
    padding-bottom: 5rem;
}

.project-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

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

.project-hero-bg::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
}

.project-title-container {
    padding: 0 4rem;
    color: var(--color-white);
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
}

.project-title-container h1 {
    color: var(--color-white);
    margin-bottom: 1rem;
}

.project-meta {
    display: flex;
    gap: 2rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255,255,255,0.8);
}

.fade-up {
    animation: fadeUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.project-description {
    max-width: 900px;
    margin: 0 auto;
}

.project-description .lead {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    color: var(--color-accent);
    line-height: 1.4;
    margin-bottom: 3rem;
    font-weight: 300;
}

.text-content p {
    margin-bottom: 1.5rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.gallery-item {
    aspect-ratio: 4/3;
    overflow: hidden;
    background: var(--color-gray-bg);
}

.gallery-item.item-large {
    grid-column: 1 / -1;
    aspect-ratio: 16/9;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.next-project {
    background: var(--color-gray-bg);
}

.next-project-link h2 {
    font-size: clamp(3rem, 6vw, 5rem);
    margin: 0;
    transition: var(--transition-fast);
}

.next-project-link:hover h2 {
    opacity: 0.5;
}

/* =========================================
   Scroll to Top Button
   ========================================= */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    background-color: var(--color-white);
    color: var(--color-accent);
    border: 1px solid var(--color-gray-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    z-index: 99;
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
    transition: var(--transition-smooth);
}

.scroll-to-top svg {
    width: 24px;
    height: 24px;
    transition: transform var(--transition-fast);
}

.scroll-to-top.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.scroll-to-top:hover {
    background-color: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

.scroll-to-top:hover svg {
    transform: translateY(-3px);
}

/* =========================================
   Responsive Adjustments
   ========================================= */
@media (max-width: 992px) {
    .about-grid, .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .about-skills {
        padding: 3rem;
    }
    .project-grid {
        gap: 2rem;
    }
    .project-title-container {
        padding: 0 2rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* simple mobile setup, ideally add a hamburger menu */
    }
    .project-grid {
        grid-template-columns: 1fr;
    }
    .project-grid > :nth-child(even) {
        transform: translateY(0);
    }
    .contact {
        margin-top: 0;
    }
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    .gallery-item {
        aspect-ratio: auto;
        min-height: 300px;
    }
}