/* ===== CSS Variables ===== */
:root {
    --color-bg: #0f0f0f;
    --color-text-primary: #f5f5f0;
    --color-text-secondary: #8a8a85;
    --color-accent: #c9a227;
    --color-accent-muted: rgba(201, 162, 39, 0.15);
    
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-accent: 'Cormorant Garamond', Georgia, serif;
    
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 0.2s ease;
    
    --spacing-unit: 8px;
    --max-width: 1100px;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-body);
    font-weight: 400;
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    transition: background-color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-x: hidden;
}

/* Section-based color schemes */
body[data-section="gerald"] {
    --color-text-primary: #2a1f20;
    --color-text-secondary: #5a4547;
    --color-accent: #8b3a3f;
}

body[data-section="exposure"] {
    --color-text-primary: #1a2633;
    --color-text-secondary: #4a5a6a;
    --color-accent: #2a5a9a;
}

body[data-section="sm-2"] {
    --color-text-primary: #1a2a18;
    --color-text-secondary: #4a5a48;
    --color-accent: #2a6a28;
}

#loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #0f0f0f;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out;
}

#loader.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loader-circle {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(245, 245, 240, 0.1);
    border-top-color: #f5f5f0;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

#landing {
    position: fixed;
    inset: 0;
    background-color: #0a0a0a;
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

#landing.fade-out {
    opacity: 0;
    visibility: hidden;
}

#landing-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.landing-text {
    display: flex;
    gap: 40px;
}

.landing-letter {
    font-family: var(--font-display);
    font-size: 6rem;
    font-weight: 400;
    color: var(--color-text-primary);
    letter-spacing: 0.05em;
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
    margin-bottom: 0;
    padding-bottom: 0;
    height: 110px;
}

.landing-letter:nth-child(2) {
    animation-delay: 0.2s;
}

.landing-line {
    width: 120px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    animation: expandLine 1s ease 0.5s forwards;
    transform: scaleX(0);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes expandLine {
    to {
        transform: scaleX(1);
    }
}

#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 calc(var(--spacing-unit) * 6);
    z-index: 100;
    background: linear-gradient(to bottom, rgba(15, 15, 15, 0.9), transparent);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

body[data-section="gerald"] #navbar,
body[data-section="exposure"] #navbar,
body[data-section="sm-2"] #navbar {
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.8), transparent);
}

#name {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

#name h3 {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: var(--color-text-primary);
    line-height: 1.3;
    transition: color var(--transition-smooth);
}

#links {
    display: flex;
    gap: calc(var(--spacing-unit) * 5);
}

#links a {
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-decoration: none;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

#links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-accent);
    transition: width var(--transition-fast);
}

#links a:hover {
    color: var(--color-text-primary);
}

#links a:hover::after {
    width: 100%;
}

#section-indicator {
    position: fixed;
    right: calc(var(--spacing-unit) * 4);
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 100;
}

.indicator-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-text-secondary);
    opacity: 0.3;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.indicator-dot.active {
    opacity: 1;
    background-color: var(--color-accent);
    transform: scale(1.3);
}

#information {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 160px calc(var(--spacing-unit) * 6) 100px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 100vh;
    position: relative;
}

#personal-info {
    max-width: 500px;
    z-index: 1;
}

#personal-description {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 4);
}

#personal-divider {
    width: 60px;
    height: 1px;
    background-color: var(--color-accent);
    margin-bottom: calc(var(--spacing-unit) * 4);
}

#additional-info {
    font-family: var(--font-accent);
    font-size: 1.25rem;
    font-weight: 400;
    font-style: italic;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: calc(var(--spacing-unit) * 4);
}

#additional-info span {
    color: var(--color-accent);
    font-style: normal;
    font-weight: 500;
}

#social-links {
    display: flex;
    gap: calc(var(--spacing-unit) * 3);
}

#social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-text-secondary);
    border-radius: 50%;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

#social-links a:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

#social-links svg {
    width: 18px;
    height: 18px;
}

#portrait-container {
    position: relative;
}

.portrait-frame {
    position: relative;
    width: 380px;
    height: 500px;
    overflow: hidden;
}

.portrait-frame::before {
    content: '';
    position: absolute;
    inset: 0;
    border: 1px solid var(--color-accent);
    opacity: 0.3;
    transform: translate(15px, 15px);
    z-index: -1;
}

.portrait-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(20%);
    transition: filter var(--transition-smooth);
}

.portrait-frame:hover img {
    filter: grayscale(0%);
}

#skills {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: calc(var(--spacing-unit) * 12) calc(var(--spacing-unit) * 6);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: calc(var(--spacing-unit) * 8);
    min-height: 100vh;
    align-content: center;
}

.skills-block {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.skills-block h3 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 400;
    line-height: 1.3;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 2);
    transition: color var(--transition-smooth);
}

.skills-block p {
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    transition: color var(--transition-smooth);
}

#skills-container {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 4);
    padding: calc(var(--spacing-unit) * 4);
}

.skill-row {
    display: flex;
    justify-content: center;
    gap: calc(var(--spacing-unit) * 5);
}

.skill-icon {
    position: relative;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(138, 138, 133, 0.2);
    border-radius: 12px;
    transition: all var(--transition-fast);
    cursor: default;
}

.skill-icon:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.skill-icon img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    filter: grayscale(100%) brightness(0.7);
    transition: filter var(--transition-fast);
}

.skill-icon:hover img {
    filter: none;
}

.skill-icon::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-body);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    color: var(--color-text-primary);
    background-color: rgba(15, 15, 15, 0.95);
    padding: 6px 10px;
    border-radius: 4px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
}

.skill-icon:hover::after {
    opacity: 1;
    visibility: visible;
}

.testimonial-block {
    background: linear-gradient(135deg, rgba(201, 162, 39, 0.05), transparent);
    border-left: 2px solid var(--color-accent);
    padding: calc(var(--spacing-unit) * 4);
    border-radius: 0 8px 8px 0;
}

#quote {
    font-family: var(--font-accent);
    font-size: 1.15rem;
    font-style: italic;
    line-height: 1.8;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 3);
    transition: opacity 0.5s ease, color var(--transition-smooth);
}

#quote-profile {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    transition: opacity 0.5s ease;
}

#quote-image {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-accent);
}

#quote-details {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

#quote-name {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    font-style: normal;
    color: var(--color-text-primary);
    transition: color var(--transition-smooth);
}

#quote-occupation {
    font-family: var(--font-body);
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-smooth);
}

.project {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: calc(var(--spacing-unit) * 6);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: calc(var(--spacing-unit) * 8);
}

.project:nth-child(odd) {
    flex-direction: row-reverse;
}

.project-images {
    position: relative;
    flex: 1;
    max-width: 550px;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-background-pattern {
    position: absolute;
    inset: 0;
    opacity: 0.05;
    background-image: 
        radial-gradient(circle at 25% 25%, currentColor 1px, transparent 1px),
        radial-gradient(circle at 75% 75%, currentColor 1px, transparent 1px);
    background-size: 30px 30px;
    color: var(--color-text-primary);
}

.project-gif {
    width: 85%;
    height: auto;
    border-radius: 8px;
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.25),
        0 0 0 1px rgba(255, 255, 255, 0.05);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.project:hover .project-gif {
    transform: translateY(-8px);
    box-shadow: 
        0 35px 60px -15px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.1);
}

.project-details {
    flex: 0 0 380px;
}

.project-num {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1.5);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.underliner {
    width: 30px;
    height: 1px;
    background-color: var(--color-accent);
}

.project-num-info {
    font-family: var(--font-body);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    color: var(--color-accent);
}

.project-name {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 400;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 2);
    transition: color var(--transition-smooth);
}

.project-name span {
    display: block;
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-top: calc(var(--spacing-unit) * 1);
    transition: color var(--transition-smooth);
}

.project-description {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 4);
    transition: color var(--transition-smooth);
}

.project-ext-links {
    display: flex;
    gap: calc(var(--spacing-unit) * 2);
}

.project-live {
    display: inline-flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--color-text-primary);
    text-decoration: none;
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
    border: 1px solid var(--color-text-secondary);
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.project-live:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateX(4px);
}

.project-live svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.project-live:hover svg {
    transform: translate(2px, -2px);
}

#contact {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: calc(var(--spacing-unit) * 16) calc(var(--spacing-unit) * 6);
    text-align: center;
}

.footer-content {
    margin-bottom: calc(var(--spacing-unit) * 12);
}

.footer-content h2 {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 400;
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 2);
    transition: color var(--transition-smooth);
}

.footer-content p {
    font-family: var(--font-accent);
    font-size: 1.25rem;
    font-style: italic;
    color: var(--color-text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 4);
    transition: color var(--transition-smooth);
}

.contact-link {
    display: inline-flex;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-decoration: none;
    color: var(--color-text-primary);
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 5);
    border: 1px solid var(--color-accent);
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.contact-link:hover {
    background-color: var(--color-accent);
    color: #0f0f0f;
}

.footer-bottom {
    padding-top: calc(var(--spacing-unit) * 4);
    border-top: 1px solid rgba(138, 138, 133, 0.2);
}

.footer-bottom span {
    font-family: var(--font-body);
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-smooth);
}

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

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

.fade-on-scroll.early-fade {
    transition-delay: 0.1s;
}

@media (max-width: 1024px) {
    #information {
        flex-direction: column;
        text-align: center;
        padding-top: 120px;
    }
    
    #personal-info {
        max-width: 100%;
        margin-bottom: calc(var(--spacing-unit) * 6);
    }
    
    #personal-divider {
        margin-left: auto;
        margin-right: auto;
    }
    
    #social-links {
        justify-content: center;
    }
    
    .portrait-frame {
        width: 300px;
        height: 400px;
    }
    
    #skills {
        grid-template-columns: 1fr;
        gap: calc(var(--spacing-unit) * 6);
    }
    
    .project {
        flex-direction: column !important;
        text-align: center;
        padding: calc(var(--spacing-unit) * 8) calc(var(--spacing-unit) * 4);
    }
    
    .project-details {
        flex: none;
        max-width: 500px;
    }
    
    .project-ext-links {
        justify-content: center;
    }
    
    #section-indicator {
        display: none;
    }
}

@media (max-width: 640px) {
    #personal-description {
        font-size: 2rem;
    }
    
    .skills-block h3 {
        font-size: 1.5rem;
    }
    
    .project-name {
        font-size: 1.8rem;
    }
    
    .footer-content h2 {
        font-size: 2rem;
    }
    
    #navbar {
        padding: 0 calc(var(--spacing-unit) * 3);
    }
    
    #links {
        gap: calc(var(--spacing-unit) * 2);
    }
    
    #links a {
        font-size: 0.7rem;
    }
}

::selection {
    background-color: var(--color-accent);
    color: #0f0f0f;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-text-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}