/* 
   RUSLAN ANTONENKO PORTFOLIO WEBSITE
   Core Design System and Styles
*/

/* ----------------------------------------------------
   1. VARIABLES & SYSTEM DEFAULTS
---------------------------------------------------- */
:root {
    /* Color Palette - Light Mode (Default) */
    --bg-color: #ffffff;
    --text-color: #111111;
    --text-muted: #767676;
    --accent-color: #003cff;
    --grid-color: #e8e8e6;
    --glow-color: rgba(0, 60, 255, 0.12);
    --panel-backdrop: rgba(0, 0, 0, 0.3);
    --selection-bg: #003cff;
    --selection-color: #ffffff;

    /* Fonts */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Space Mono', monospace;

    /* Cursor */
    --cursor-size: 40px;
    --cursor-dot-size: 6px;

    /* Gallery spacing */
    --gallery-gap: 40px; /* desktop default */
}

[data-theme="dark"] {
    /* Color Palette - Dark Mode */
    --bg-color: #0c0c0e;
    --text-color: #f5f5f7;
    --text-muted: #8e8e93;
    --accent-color: #0055ff;
    --grid-color: #1a1a1f;
    --glow-color: rgba(0, 85, 255, 0.25);
    --panel-backdrop: rgba(0, 0, 0, 0.6);
    --selection-bg: #0055ff;
    --selection-color: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html, body {
    width: 100%;
    height: auto;
    overflow-y: auto; /* enable page scrolling */
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    transition: background-color 0.8s cubic-bezier(0.85, 0, 0.15, 1), color 0.8s cubic-bezier(0.85, 0, 0.15, 1);
    scroll-behavior: smooth;
}

::selection {
    background-color: var(--selection-bg);
    color: var(--selection-color);
}

/* Hide Default Scrollbar because the page is single-viewport, 
   but define smooth scroll in case content overflows on mobile */
body {
    position: relative;
    cursor: none; /* Hide default cursor to use custom premium cursor */
}

/* ----------------------------------------------------
   2. CUSTOM CURSOR
---------------------------------------------------- */
#custom-cursor {
    width: var(--cursor-size);
    height: var(--cursor-size);
    border: 1px solid var(--accent-color);
    border-radius: 50%;
    position: fixed;
    transform: translate(-50%, -50%) scale(1);
    pointer-events: none;
    z-index: 9999;
    transition: transform 0.15s ease-out, border-color 0.3s;
    opacity: 0;
}

#custom-cursor-dot {
    width: var(--cursor-dot-size);
    height: var(--cursor-dot-size);
    background-color: var(--accent-color);
    border-radius: 50%;
    position: fixed;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 9999;
    opacity: 0;
}

/* Cursor interactions */
body:hover #custom-cursor,
body:hover #custom-cursor-dot {
    opacity: 1;
}

.clickable-hover #custom-cursor {
    transform: translate(-50%, -50%) scale(1.6);
    background-color: rgba(0, 60, 255, 0.05);
    border-color: var(--accent-color);
}

[data-theme="dark"] .clickable-hover #custom-cursor {
    background-color: rgba(0, 85, 255, 0.08);
}

.copyable-hover #custom-cursor {
    transform: translate(-50%, -50%) scale(1.4);
    border-style: dashed;
}

/* ----------------------------------------------------
   3. BACKGROUND GRID SYSTEM
---------------------------------------------------- */
.grid-container {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 1;
    padding: 0 4vw;
}

.grid-line {
    border-right: 1px solid var(--grid-color);
    height: 100%;
    opacity: 0.6;
    transition: border-color 0.8s cubic-bezier(0.85, 0, 0.15, 1);
}

.grid-line:last-child {
    border-right: none;
}

/* ----------------------------------------------------
   4. INTERACTIVE PHYSICS CANVAS
---------------------------------------------------- */
#physics-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 2;
    pointer-events: none;
}

/* ----------------------------------------------------
   5. HEADER NAVIGATION
---------------------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4vh 4vw;
    z-index: 10;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
}

.header-logo {
    font-weight: 500;
    cursor: pointer;
    font-size: 0.9rem;
    position: relative;
    padding: 0.5rem 0;
}

.header-logo::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--text-color);
    transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.header-logo:hover::after {
    width: 100%;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 2.2rem;
}

.theme-toggle {
    background: none;
    border: none;
    outline: none;
    color: var(--text-color);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.3s, transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.theme-toggle:hover {
    background-color: var(--grid-color);
    transform: translateX(-50%) rotate(30deg);
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
}

.lang-btn {
    background: none;
    border: none;
    outline: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    line-height: 1;
    font-size: inherit;
    font-family: inherit;
    letter-spacing: inherit;
    transition: color 0.3s;
}

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

.lang-btn.active {
    color: var(--text-color);
    font-weight: 500;
}

.lang-separator {
    color: var(--grid-color);
    user-select: none;
    line-height: 1;
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

[data-theme="dark"] .sun-icon {
    display: block;
}

[data-theme="dark"] .moon-icon {
    display: none;
}

.menu-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    padding: 0.5rem 0 0.5rem 1rem;
    overflow: hidden;
    position: relative;
}

.menu-toggle .menu-text {
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.menu-toggle:hover .menu-text {
    transform: translateY(-110%);
}

.menu-toggle::after {
    content: 'OPEN';
    position: absolute;
    left: 1rem;
    top: 100%;
    color: var(--accent-color);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.menu-toggle:hover::after {
    transform: translateY(-210%);
}

/* ----------------------------------------------------
   6. HERO MAIN CONTENT
---------------------------------------------------- */
.main-content {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    height: 100vh;
    padding: 0 4vw;
    align-items: center;
    position: relative;
    z-index: 3;
}

.hero-text-section {
    grid-column: 1 / 8;
    display: flex;
    flex-direction: column;
    z-index: 5;
    pointer-events: none; /* Make overlay elements clickable */
}

.hero-text-section > * {
    pointer-events: auto; /* Re-enable pointer events for actual interactive components */
}

.hero-name {
    font-size: clamp(3rem, 7.5vw, 6.8rem);
    font-weight: 400;
    line-height: 0.92;
    letter-spacing: -0.035em;
    text-transform: none;
    margin-bottom: 5vh;
}

/* Word & Character Hover Effect */
.word-wrapper {
    display: inline-block;
    white-space: nowrap;
}

.char-span {
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), color 0.3s;
}

.char-span:hover {
    transform: translateY(-5px) skewX(-5deg);
    color: var(--accent-color);
}

/* Metadata Row layout */
.metadata-row {
    display: flex;
    flex-wrap: wrap;
    gap: 4.5rem;
    margin-top: 1vh;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.05em;
}

.meta-label {
    color: var(--text-muted);
    font-weight: 400;
}

.meta-value {
    font-weight: 500;
    position: relative;
}

.link-style {
    color: var(--accent-color);
    position: relative;
    padding-bottom: 2px;
}

.link-style::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--accent-color);
    transform: scaleX(1);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.meta-item:hover .link-style::after {
    transform: scaleX(0);
    transform-origin: right;
}

/* Tooltip copy indication */
.copyable {
    position: relative;
}

.tooltip {
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%) translateY(5px);
    background-color: var(--text-color);
    color: var(--bg-color);
    padding: 0.4rem 0.8rem;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    white-space: nowrap;
    border-radius: 2px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.copyable:hover .tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* 3D Visual Area */
.visual-wrapper {
    grid-column: 8 / 13;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 4;
    perspective: 1500px;
}

.parallax-container {
    position: relative;
    width: 80%;
    max-width: 380px;
    aspect-ratio: 1;
    transform-style: preserve-3d;
    transition: transform 0.25s cubic-bezier(0.25, 1, 0.5, 1);
    display: flex;
    justify-content: center;
    align-items: center;
}

.crumpled-foil-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transform: translateZ(30px);
    pointer-events: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.08));
    animation: idleFloat 6s ease-in-out infinite;
    /* Opacity starts at 0 so JS can replace transparency seamlessly first */
    opacity: 0;
    transition: opacity 0.5s ease;
}

.glow-shadow {
    position: absolute;
    width: 70%;
    height: 70%;
    background: radial-gradient(circle, var(--glow-color) 0%, rgba(0,0,0,0) 70%);
    border-radius: 50%;
    transform: translateZ(-20px) scale(1);
    pointer-events: none;
    transition: background 0.8s, transform 0.3s;
}

@keyframes idleFloat {
    0%, 100% {
        transform: translateZ(30px) translateY(0) rotate(0deg);
    }
    50% {
        transform: translateZ(30px) translateY(-12px) rotate(1.5deg);
    }
}

/* ----------------------------------------------------
   7. FOOTER ACTION
---------------------------------------------------- */
.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100vw;
    display: flex;
    justify-content: flex-end;
    padding: 4vh 4vw;
    z-index: 10;
}

.start-project-btn {
    background: none;
    border: none;
    color: var(--text-color);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.5rem 0;
    position: relative;
    overflow: hidden;
}

.start-project-btn svg {
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.start-project-btn:hover svg {
    transform: translateX(5px);
    color: var(--accent-color);
}

.start-project-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--text-color);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.start-project-btn:hover::after {
    transform: scaleX(1);
    transform-origin: left;
    background-color: var(--accent-color);
}

/* ----------------------------------------------------
   8. FULL-SCREEN NAV OVERLAY MENU
---------------------------------------------------- */
.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--text-color);
    color: var(--bg-color);
    z-index: 999;
    transform: translateY(-100%);
    transition: transform 0.8s cubic-bezier(0.85, 0, 0.15, 1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 4vh 4vw;
}

.menu-overlay.active {
    transform: translateY(0);
}

.menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
}

.white-logo {
    color: var(--bg-color);
}

.menu-close {
    background: none;
    border: none;
    color: var(--bg-color);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    padding: 0.5rem 0 0.5rem 1rem;
    overflow: hidden;
    position: relative;
}

.menu-close .menu-text {
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.menu-close:hover .menu-text {
    transform: translateY(-110%);
}

.menu-close::after {
    content: 'CLOSE';
    position: absolute;
    left: 1rem;
    top: 100%;
    color: var(--accent-color);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.menu-close:hover::after {
    transform: translateY(-210%);
}

.menu-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 4vh 0;
}

.menu-nav {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.menu-link {
    color: var(--bg-color);
    font-size: clamp(2.5rem, 6vw, 5.5rem);
    font-weight: 300;
    text-decoration: none;
    letter-spacing: -0.02em;
    line-height: 1;
    display: flex;
    align-items: flex-end;
    width: fit-content;
    transform: translateY(50px);
    opacity: 0;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.5s, color 0.3s;
}

.menu-overlay.active .menu-link {
    transform: translateY(0);
    opacity: 1;
}

.menu-overlay.active .menu-link:nth-child(1) { transition-delay: 0.2s; }
.menu-overlay.active .menu-link:nth-child(2) { transition-delay: 0.3s; }
.menu-overlay.active .menu-link:nth-child(3) { transition-delay: 0.4s; }
.menu-overlay.active .menu-link:nth-child(4) { transition-delay: 0.5s; }

.link-num {
    font-family: var(--font-mono);
    font-size: 1rem;
    margin-right: 1.5rem;
    margin-bottom: clamp(0.5rem, 1.5vw, 1.2rem);
    color: var(--accent-color);
    letter-spacing: 0.05em;
}

.menu-link:hover {
    color: var(--accent-color);
    transform: translateX(15px);
}

.menu-footer {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 4vh;
}

.menu-footer-col {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
}

.menu-meta-label {
    color: rgba(255, 255, 255, 0.4);
    margin-bottom: 0.2rem;
}

.menu-meta-link {
    color: var(--bg-color);
    text-decoration: none;
    transition: color 0.3s;
}

.menu-meta-link:hover {
    color: var(--accent-color);
}

.menu-meta-value {
    color: var(--bg-color);
}

/* ----------------------------------------------------
   9. CONTACT PANEL SLIDE-OUT
---------------------------------------------------- */
.contact-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 500px;
    max-width: 100vw;
    height: 100vh;
    background-color: var(--bg-color);
    border-left: 1px solid var(--grid-color);
    z-index: 1001;
    transform: translateX(100%);
    transition: transform 0.6s cubic-bezier(0.85, 0, 0.15, 1);
    padding: 6vh 4vw;
    display: flex;
    flex-direction: column;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.05);
}

.contact-panel.active {
    transform: translateX(0);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8vh;
}

.panel-header h3 {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.1em;
}

.panel-close {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
    transition: transform 0.3s;
}

.panel-close:hover {
    transform: rotate(90deg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 3.5rem;
    flex-grow: 1;
}

.form-group {
    position: relative;
    display: flex;
    flex-direction: column;
}

.form-group input,
.form-group textarea {
    background: none;
    border: none;
    border-bottom: 1px solid var(--text-muted);
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--text-color);
    padding: 0.6rem 0;
    width: 100%;
    outline: none;
    transition: border-color 0.4s;
    cursor: none; /* Keep using custom cursor */
}

.form-group label {
    position: absolute;
    left: 0;
    top: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    pointer-events: none;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), color 0.3s;
}

.form-group input:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
    transform: translateY(-1.5rem) scale(0.85);
    transform-origin: left;
    color: var(--accent-color);
}

.line-border {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--accent-color);
    transform: scaleX(0);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.form-group input:focus ~ .line-border,
.form-group textarea:focus ~ .line-border {
    transform: scaleX(1);
}

.form-group textarea {
    resize: none;
}

.submit-btn {
    align-self: flex-start;
    background: none;
    border: none;
    color: var(--text-color);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem 0;
    position: relative;
    overflow: hidden;
}

.submit-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--accent-color);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.submit-btn:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.submit-btn svg {
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.submit-btn:hover svg {
    transform: translate(3px, -3px);
    color: var(--accent-color);
}

.form-success-message {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    text-align: center;
    flex-grow: 1;
    color: var(--accent-color);
}

.form-success-message p {
    font-family: var(--font-sans);
    color: var(--text-color);
    font-size: 1rem;
    max-width: 300px;
    line-height: 1.6;
}

.panel-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--panel-backdrop);
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.6s ease;
    backdrop-filter: blur(5px);
}

.panel-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

/* ----------------------------------------------------
   10. RESPONSIVE DESIGN MEDIA QUERIES
---------------------------------------------------- */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
        padding-top: 15vh;
        padding-bottom: 12vh;
        height: auto;
        min-height: 100vh;
        overflow-y: auto;
    }

    .hero-text-section {
        grid-column: 1 / 13;
        margin-bottom: 6vh;
    }

    .visual-wrapper {
        grid-column: 1 / 13;
        justify-content: flex-start;
        padding-left: 2vw;
    }

    .parallax-container {
        width: 60%;
        max-width: 280px;
    }

    .grid-container {
        grid-template-columns: repeat(6, 1fr);
    }
    
    .grid-line:nth-child(n+7) {
        display: none;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 3vh 6vw;
    }
    
    .grid-container {
        padding: 0 6vw;
    }
    
    .main-content {
        padding: 12vh 6vw 10vh 6vw;
    }

    .hero-name {
        margin-bottom: 4vh;
    }

    .metadata-row {
        gap: 2rem;
        flex-direction: column;
    }
    
    .meta-item {
        gap: 0.3rem;
    }

    .visual-wrapper {
        padding-left: 0;
        margin-top: 2vh;
    }

    .parallax-container {
        width: 70%;
        max-width: 230px;
    }

    .footer {
        padding: 3vh 6vw;
    }
    
    .menu-overlay {
        padding: 3vh 6vw;
    }

    .menu-footer {
        flex-direction: column;
        gap: 1.5rem;
        padding-top: 2vh;
    }

    #custom-cursor, #custom-cursor-dot {
        display: none; /* Disable custom cursor on mobile touch screens */
    }
    
    body {
        cursor: auto;
    }
    
    .form-group input,
    .form-group textarea {
        cursor: auto;
    }

    /* Stack param rows on small screens so values don't overlap */
    .param-row {
        grid-template-columns: 1fr; /* label above value */
    }
    .param-label {
        margin-bottom: 0.25rem;
    }
}

/* ----------------------------------------------------
   11. FLOATING PROJECT PREVIEW CARD
---------------------------------------------------- */
.floating-preview {
    position: fixed;
    pointer-events: none;
    z-index: 998;
    display: flex;
    flex-direction: column;
    width: 220px;
    background-color: var(--bg-color);
    border: 1px solid var(--grid-color);
    padding: 12px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
    opacity: 0;
    transform: translate(-50%, -120%) scale(0.9);
    transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.8s, border-color 0.8s;
}

.floating-preview.active {
    opacity: 1;
    transform: translate(-50%, -120%) scale(1);
}

.preview-img-container {
    width: 100%;
    aspect-ratio: 4 / 5;
    overflow: hidden;
    background-color: var(--grid-color);
    margin-bottom: 10px;
    border: 1px solid var(--grid-color);
}

.preview-img-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-details {
    display: flex;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.05em;
}

.preview-num {
    color: var(--accent-color);
    font-weight: 500;
}

.preview-title {
    font-weight: 500;
    color: var(--text-color);
    text-transform: uppercase;
}

/* ----------------------------------------------------
   12. PROJECT DETAIL MODAL (FULL-SCREEN)
---------------------------------------------------- */
.project-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--bg-color);
    z-index: 1002;
    transform: translateY(100%);
    transition: transform 0.8s cubic-bezier(0.85, 0, 0.15, 1), background-color 0.8s;
    display: flex;
    flex-direction: column;
    padding: 4vh 4vw;
overflow-y: auto; /* enable scrolling inside modal */
}

.project-modal.active {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    margin-bottom: 5vh;
}

.modal-project-idx {
    font-weight: 500;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    padding: 0.5rem 0 0.5rem 1rem;
    overflow: hidden;
    position: relative;
}

.modal-close .close-text {
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-close:hover .close-text {
    transform: translateY(-110%);
}

.modal-close::after {
    content: 'CLOSE';
    position: absolute;
    left: 1rem;
    top: 100%;
    color: var(--accent-color);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-close:hover::after {
    transform: translateY(-210%);
}

.modal-body {
    flex-grow: 1;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 4vw;
    overflow: visible; /* allow modal content to expand and enable parent scrolling */
    padding-bottom: 2vh;
    align-items: start; /* ensure left column (details) aligns to top */
}

.modal-details-col {
    grid-column: 1 / 6;
    display: flex;
    flex-direction: column;
   justify-content: flex-start; /* align content to the top */
   align-items: flex-start; /* ensure children start at left */
   overflow: visible; /* allow details to flow with page scroll */
   padding-right: 2vw;
   padding-top: 0;
}

/* Hide scrollbar for layout cleanliness */
.modal-details-col::-webkit-scrollbar {
    display: none;
}

.modal-project-title {
    font-size: clamp(2rem, 4.5vw, 4.2rem);
    font-weight: 400;
    line-height: 0.95;
    letter-spacing: -0.035em;
    margin-bottom: 4vh;
}

.modal-project-desc {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-muted);
    margin-bottom: 5vh;
    max-width: 90%;
}

.project-params-list {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    border-top: 1px solid var(--grid-color);
    padding-top: 4vh;
    transition: border-color 0.8s;
}

.param-row {
    display: grid;
    grid-template-columns: 120px 1fr; /* fixed label column, flexible value column */
    gap: 1rem;
    align-items: start;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.05em;
}

.param-value {
    font-weight: 500;
    white-space: normal; /* allow wrapping */
    word-break: break-word;
    overflow-wrap: anywhere;
}

.param-label {
    color: var(--text-muted);
}

.param-value {
    font-weight: 500;
    color: var(--text-color);
}

.modal-visuals-col {
    grid-column: 6 / 13;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center; /* center gallery and modal image horizontally */
    height: auto;
    overflow: visible; /* allow visuals column to grow and be scrollable by page */
}

.modal-img-wrapper {
    width: 100%;
    max-width: 720px; /* match gallery width */
    height: auto;
    overflow: hidden;
    background-color: var(--grid-color);
    border: 1px solid var(--grid-color);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: border-color 0.8s, background-color 0.8s;
    position: relative;
    margin-bottom: var(--gallery-gap); /* equal spacing between main image and gallery */
}

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

.modal-img-wrapper:hover img {
    transform: none; /* disable modal image hover zoom */
}

/* Project gallery: thumbnails, lazy load, lightbox */
.project-gallery {
    width: 100%;
    max-width: 720px; /* unify gallery width */
    margin: 2rem auto 0 auto; /* centered vertical column */
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.modal-img-wrapper {
    max-width: 720px; /* match gallery width for alignment */
    margin: 0 auto;
}

.gallery-controls {
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.gallery-filters {
    display: flex;
    gap: 0.5rem;
}

.filter-btn {
    background: none;
    border: 1px solid var(--grid-color);
    padding: 6px 10px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 3px;
}

.filter-btn.active {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.gallery-viewport {
    width: 100%;
    height: auto; /* flow naturally with page content */
    overflow: visible;
    scroll-behavior: smooth;
    padding-bottom: 0;
}

.thumbnails {
    display: block; /* strict vertical flow */
    padding: 0;
}

.thumbnails > figure {
    width: 100%;
    max-width: 720px; /* constrain each figure to gallery width */
    margin: 0 auto var(--gallery-gap) auto; /* center each figure horizontally */
    display: block;
}

/* Initial hidden state for reveal animation */
.thumbnails > figure, .thumbnails > .thumb-btn {
    transform: translateY(12px);
    opacity: 0;
    transition: transform 0.6s cubic-bezier(0.16,1,0.3,1), opacity 0.6s;
    scroll-snap-align: start;
    width: 100%;
    display: block;
}

/* Figures flow normally in a vertical column with consistent spacing */
.thumbnails > figure {
    margin: 0;
    padding: 0;
    width: 100%;
}

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

/* Each thumbnail now becomes a full-width block inside the gallery container */
.thumb-btn, .thumb-figure {
    background: none;
    border: none;
    width: 100%;
    display: block;
    margin: 0 auto;
    cursor: default; /* remove pointer cursor on gallery items */
    padding: 0;
}

.thumb-img, .thumb-figure img, .vertical-img {
    width: 100%;
    height: auto; /* preserve aspect ratio */
    object-fit: contain;
    display: block;
    border: 1px solid var(--grid-color);
    transition: none; /* no hover transform */
}

.thumb-btn:hover .thumb-img,
.thumb-figure:hover img,
.vertical-img:hover {
    transform: none; /* disable hover zoom */
    box-shadow: none; /* remove hover shadow */
    cursor: default; /* disable pointer cursor on images */
}

.thumb-caption, .thumb-figure figcaption {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 8px;
}

@media (max-width: 1024px) {
    --gallery-gap: 32px;
    .thumbnails { gap: 32px; }
}

@media (max-width: 768px) {
    --gallery-gap: 24px;
    .thumbnails { gap: 24px; }
    .thumb-caption, .thumb-figure figcaption { font-size: 0.78rem; }
}

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(0,0,0,0.75);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease;
    z-index: 2000;
    padding: 4vh 4vw;
}

.lightbox.open {
    opacity: 1;
    visibility: visible;
}

.lightbox-inner {
    position: relative;
    max-width: 1100px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

.lightbox-img {
    max-width: 100%;
    max-height: 78vh;
    object-fit: contain;
    transition: transform 0.3s ease;
    touch-action: pan-y pinch-zoom;
}

.lightbox-img.zoomed {
    transform: scale(2);
}

.lightbox-caption {
    color: #fff;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    opacity: 0.95;
    text-align: center;
}

.lightbox-close {
    position: absolute;
    right: 0.2rem;
    top: -2.4rem;
    background: none;
    border: none;
    color: #fff;
    font-size: 2.2rem;
    cursor: pointer;
}

.lightbox-zoom {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.08);
    color: #fff;
    padding: 6px 10px;
    border-radius: 3px;
    cursor: pointer;
}

/* Mobile tweaks */
@media (max-width: 768px) {
    .gallery-viewport { height: 160px; }
    .thumb-btn { width: 120px; flex: 0 0 120px; }
    .thumb-img { height: 90px; }
}

/* Stacked vertical images */
.stacked-images {
    width: 100%;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-top: 1.5rem;
    scroll-behavior: smooth; /* smooth scroll behavior for anchor links */
}

.stacked-figure {
    display: block;
    margin: 0;
    border: 1px solid var(--grid-color);
    overflow: hidden;
    background: var(--grid-color);
    transform: translateY(12px);
    opacity: 0;
    transition: transform 0.6s cubic-bezier(0.16,1,0.3,1), opacity 0.6s;
}

.stacked-figure.reveal {
    transform: translateY(0);
    opacity: 1;
}

.stacked-img {
    width: 100%;
    height: auto;
    display: block;
}

.stacked-caption {
    padding: 0.6rem 0.8rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Reveal state for lazy-loaded images */
img.loaded + .stacked-caption, img.loaded {
    /* ensures caption/readability once image loads */
}

@media (max-width: 768px) {
    .stacked-images { gap: 1rem; }
}

/* ----------------------------------------------------
   13. PROJECT HOVER CURSOR STATES
---------------------------------------------------- */
.project-hover #custom-cursor {
    width: 50px;
    height: 50px;
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-hover #custom-cursor::after {
    content: attr(data-text);
    color: var(--bg-color);
    font-family: var(--font-mono);
    font-size: 0.52rem;
    font-weight: 600;
    letter-spacing: 0.1em;
}

.project-hover #custom-cursor-dot {
    opacity: 0;
}

/* ----------------------------------------------------
   14. RESPONSIVE MODAL OVERWRITES
---------------------------------------------------- */
@media (max-width: 1024px) {
    .project-modal {
        overflow-y: auto;
        padding: 10vh 6vw 6vh 6vw;
    }
    
    .modal-body {
        grid-template-columns: 1fr;
        overflow: visible;
        gap: 6vh;
    }
    
    .modal-details-col {
        grid-column: 1 / 13;
        overflow: visible;
        padding-right: 0;
    }
    
    .modal-visuals-col {
        grid-column: 1 / 13;
        height: auto;
    }
    
    .modal-img-wrapper {
        height: auto;
        aspect-ratio: 4 / 3;
    }
}

/* ----------------------------------------------------
   15. CONTENT OVERLAY (SELECTED WORKS, PERSPECTIVES)
---------------------------------------------------- */
.content-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--bg-color);
    z-index: 1000; /* Just below main contact panel but above default pages */
    transform: translateY(100%);
    transition: transform 0.8s cubic-bezier(0.85, 0, 0.15, 1), background-color 0.8s;
    display: flex;
    flex-direction: column;
    padding: 4vh 4vw;
    overflow: hidden;
}

.content-overlay.active {
    transform: translateY(0);
}

.overlay-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    margin-bottom: 5vh;
}

.overlay-title {
    font-weight: 500;
}

.overlay-close {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    padding: 0.5rem 0 0.5rem 1rem;
    overflow: hidden;
    position: relative;
}

.overlay-close .close-text {
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.overlay-close:hover .close-text {
    transform: translateY(-110%);
}

.overlay-close::after {
    content: 'CLOSE';
    position: absolute;
    left: 1rem;
    top: 100%;
    color: var(--accent-color);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.overlay-close:hover::after {
    transform: translateY(-210%);
}

.overlay-body {
    flex-grow: 1;
    overflow-y: auto;
    padding-bottom: 4vh;
}

.overlay-body::-webkit-scrollbar {
    width: 6px;
}

.overlay-body::-webkit-scrollbar-track {
    background: transparent;
}

.overlay-body::-webkit-scrollbar-thumb {
    background-color: var(--grid-color);
    border-radius: 3px;
}

/* ----------------------------------------------------
   16. SELECTED WORKS LIST STYLING
---------------------------------------------------- */
.works-grid {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--grid-color);
    transition: border-color 0.8s;
}

.work-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4.5vh 0;
    border-bottom: 1px solid var(--grid-color);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s;
}

.work-item:hover {
    transform: translateX(15px);
    border-color: var(--text-color);
}

.work-num {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-color);
    width: 6%;
}

.work-info {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    flex-grow: 1;
}

.work-title {
    font-size: clamp(1.4rem, 3.2vw, 2.6rem);
    font-weight: 400;
    letter-spacing: -0.025em;
    line-height: 1;
    text-transform: uppercase;
    transition: color 0.3s;
}

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

.work-category {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.work-year {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-color);
}

/* ----------------------------------------------------
   17. PERSPECTIVES BLOG STYLING
---------------------------------------------------- */
.perspectives-list {
    display: flex;
    flex-direction: column;
    gap: 8vh;
    padding-top: 2vh;
}

.perspective-post {
    max-width: 800px;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    border-bottom: 1px solid var(--grid-color);
    padding-bottom: 6vh;
    transition: border-color 0.8s;
}

.post-meta {
    display: flex;
    gap: 2rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.post-date {
    font-weight: 500;
}

.post-title {
    font-size: clamp(1.4rem, 2.5vw, 2.2rem);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.015em;
    color: var(--text-color);
}

.post-excerpt {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-muted);
}

.post-read-link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: transform 0.3s;
    width: fit-content;
}

.post-read-link:hover {
    transform: translateX(5px);
}

/* Responsive tweaks for works and perspectives */
@media (max-width: 768px) {
    .work-item {
        padding: 3vh 0;
    }
    
    .work-num {
        width: 12%;
    }
    
    .works-grid {
        margin-top: 1vh;
    }
    
    .perspectives-list {
        gap: 6vh;
    }
    
    .perspective-post {
        padding-bottom: 4vh;
        gap: 0.8rem;
    }
}