/* ==========================================================================
   NS Thompson 3D Portfolio - Main Styles
   ========================================================================== */

@font-face {
    font-family: 'PPSupplyMono';
    src: url('../fonts/PPSupplyMono-Regular.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

:root {
    --color-bg: #0a0a0b;
    --color-bg-dark: #050506;
    --color-text: #ffffff;
    --color-text-muted: #888888;
    --color-accent: #d0ff00;
    --color-accent-secondary: #ff00ff;
    --color-accent-tertiary: #00ffff;
    --font-primary: 'PPSupplyMono', monospace;
    --font-mono: 'PPSupplyMono', monospace;
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ==========================================================================
   Canvas Container
   ========================================================================== */

#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#canvas-container canvas {
    display: block;
}

/* ==========================================================================
   UI Overlay
   ========================================================================== */

#ui-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
}

#ui-overlay > * {
    pointer-events: auto;
}

/* Logo */
#logo {
    position: absolute;
    top: 2rem;
    left: 2rem;
    z-index: 100;
}

#logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--color-text);
}

.logo-svg {
    width: 40px;
    height: 37px;
    color: var(--color-accent);
    filter: drop-shadow(0 0 10px var(--color-accent))
            drop-shadow(0 0 20px var(--color-accent));
    transition: filter 0.3s ease, transform 0.3s ease;
}

#logo:hover .logo-svg {
    filter: drop-shadow(0 0 15px var(--color-accent))
            drop-shadow(0 0 30px var(--color-accent))
            drop-shadow(0 0 45px var(--color-accent));
    transform: scale(1.05);
}

/* Hamburger Menu */
#menu-toggle {
    position: absolute;
    top: 2rem;
    right: 2rem;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all 0.3s var(--ease-out-expo);
    backdrop-filter: blur(10px);
    z-index: 100;
}

#menu-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-accent);
    box-shadow: 0 0 20px rgba(208, 255, 0, 0.3);
}

.hamburger-line {
    width: 16px;
    height: 1px;
    background: var(--color-text);
    transition: all 0.3s var(--ease-out-expo);
}

#menu-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(3px, 5px);
}

#menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

#menu-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(3px, -5px);
}

/* Navigation Panel */
#nav-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 400px;
    max-width: 90vw;
    height: 100%;
    background: rgba(10, 10, 11, 0.95);
    backdrop-filter: blur(20px);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    transform: translateX(100%);
    transition: transform 0.5s var(--ease-out-expo);
    z-index: 90;
    display: flex;
    flex-direction: column;
}

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

.nav-content {
    padding: 6rem 2rem 2rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.nav-menu {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* Accordion Styling */
.nav-accordion {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 0.5rem;
}

.nav-accordion-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: none;
    border: none;
    color: var(--color-text);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.5rem 0;
    cursor: pointer;
    transition: color 0.3s ease;
}

.nav-accordion-header:hover {
    color: var(--color-accent);
}

.nav-accordion-header i {
    transition: transform 0.3s var(--ease-out-expo);
}

.nav-accordion-header.active i {
    transform: rotate(180deg);
}

.nav-accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s var(--ease-out-expo);
}

.nav-accordion-content.active {
    max-height: 800px;
}

/* Menu Item */
.nav-menu-item {
    display: block;
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.5rem 0;
    transition: all 0.3s ease;
    font-family: var(--font-mono);
}

.nav-menu-item:hover {
    color: var(--color-accent);
    padding-left: 0.5rem;
}

#project-list {
    list-style: none;
    padding-top: 0.5rem;
}

#project-list li {
    margin-bottom: 0.15rem;
}

#project-list a {
    display: block;
    padding: 0.5rem 0.75rem;
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.7rem;
    border-radius: 8px;
    transition: all 0.3s var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

#project-list a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 3px;
    height: 100%;
    background: var(--color-accent);
    transform: scaleY(0);
    transition: transform 0.3s var(--ease-out-expo);
}

#project-list a:hover {
    background: rgba(255, 255, 255, 0.05);
    padding-left: 1.5rem;
}

#project-list a:hover::before {
    transform: scaleY(1);
}

#project-list a.active {
    background: rgba(208, 255, 0, 0.1);
    color: var(--color-accent);
}

#project-list a.active::before {
    transform: scaleY(1);
}

.nav-footer {
    margin-top: auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.7rem;
    padding: 0.5rem 0;
    transition: all 0.3s ease;
}

.nav-link i {
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.nav-link:hover {
    color: var(--color-accent);
    padding-left: 0.25rem;
}

.nav-link:hover i {
    transform: translateX(2px);
}

/* Project Info Panel */
#project-info {
    position: absolute;
    bottom: 2rem;
    left: 2rem;
    max-width: 420px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s var(--ease-out-expo);
    pointer-events: none;
}

#project-info.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* Close Button */
.project-close-btn {
    position: absolute;
    top: -2.875rem;
    right: -10px;
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(5, 5, 7, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: scale(0) rotate(-90deg);
    transition: all 0.4s var(--ease-out-back);
    border: 2px solid rgba(255, 255, 255, 0.1);
    z-index: 100;
}

#project-info.visible .project-close-btn {
    opacity: 1;
    transform: scale(1) rotate(0deg);
    transition-delay: 0.3s;
}

.project-close-btn::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 50%;
    padding: 2px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.project-close-btn:hover::before {
    opacity: 1;
}

.project-close-btn:hover {
    background: rgba(208, 255, 0, 0.1);
    transform: scale(1.1) rotate(90deg);
    box-shadow: 0 0 30px rgba(208, 255, 0, 0.3);
}

.project-close-btn:active {
    transform: scale(0.95) rotate(90deg);
}

.close-icon {
    width: 18px;
    height: 18px;
    color: var(--color-text);
    transition: all 0.3s ease;
}

.project-close-btn:hover .close-icon {
    color: var(--color-accent);
}

.project-info-content {
    position: relative;
    background: rgba(5, 5, 7, 0.85);
    backdrop-filter: blur(30px) saturate(180%);
    -webkit-backdrop-filter: blur(30px) saturate(180%);
    border-radius: 16px;
    padding: 1.5rem;
    overflow: hidden;
}

/* Animated gradient border */
.project-info-content::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    padding: 1px;
    background: linear-gradient(
        45deg,
        var(--color-accent),
        var(--color-accent-secondary),
        var(--color-accent)
    );
    -webkit-mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: borderGlow 3s ease-in-out infinite;
    pointer-events: none;
}

/* Mouse tracking radial glow */
.project-info-content::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 16px;
    background: radial-gradient(
        400px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
        rgba(208, 255, 0, 0.15),
        transparent 40%
    );
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

#project-info.visible .project-info-content::after {
    opacity: 1;
}

@keyframes borderGlow {
    0%, 100% {
        opacity: 1;
        filter: brightness(1) saturate(1);
    }
    50% {
        opacity: 0.8;
        filter: brightness(1.2) saturate(1.3);
    }
}

.project-category {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    display: block;
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.2;
    position: relative;
    z-index: 1;
}

.project-excerpt {
    font-size: 0.675rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.project-meta {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1rem;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    position: relative;
    z-index: 1;
}

.project-client,
.project-year {
    text-transform: uppercase;
    font-weight: 300;
    font-size: 0.6875rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-accent);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
    position: relative;
    z-index: 1;
}

.project-link:hover {
    gap: 0.75rem;
    text-shadow: 0 0 20px var(--color-accent);
}

.project-link::after {
    content: '\2192';
}

/* Project Gallery Carousel */
.project-gallery {
    margin-bottom: 1.25rem;
    position: relative;
    z-index: 1;
}

.gallery-main {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 0.75rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-sizing: border-box;
}

.gallery-main-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.gallery-main-image.loaded {
    opacity: 1;
}

.gallery-webgl-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
}

.gallery-prev,
.gallery-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-text);
    opacity: 0;
    transition: all 0.3s var(--ease-out-expo);
    z-index: 2;
}

.gallery-main:hover .gallery-prev,
.gallery-main:hover .gallery-next {
    opacity: 1;
}

.gallery-prev:hover,
.gallery-next:hover {
    background: rgba(208, 255, 0, 0.2);
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-50%) scale(1.1);
}

.gallery-prev:active,
.gallery-next:active {
    transform: translateY(-50%) scale(0.95);
}

.gallery-prev {
    left: 0.75rem;
}

.gallery-next {
    right: 0.75rem;
}

.gallery-counter {
    position: absolute;
    bottom: 0.75rem;
    right: 0.75rem;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.gallery-thumbnails {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding: 0.25rem 0;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

.gallery-thumbnails::-webkit-scrollbar {
    height: 4px;
}

.gallery-thumbnails::-webkit-scrollbar-track {
    background: transparent;
}

.gallery-thumbnails::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
}

.gallery-thumbnails::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

.gallery-thumbnail {
    position: relative;
    min-width: 70px;
    width: 70px;
    height: 50px;
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.3s var(--ease-out-expo);
    flex-shrink: 0;
}

.gallery-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
    transition: all 0.3s ease;
}

.gallery-thumbnail:hover img {
    opacity: 1;
}

.gallery-thumbnail:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.3);
}

.gallery-thumbnail.active {
    border-color: var(--color-accent);
    box-shadow: 0 0 20px rgba(208, 255, 0, 0.3);
}

.gallery-thumbnail.active img {
    opacity: 1;
}

.gallery-thumbnail.active::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 60%, var(--color-accent) 100%);
    opacity: 0.15;
    pointer-events: none;
}

/* Controls Hint */
#controls-hint {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

#controls-hint:hover {
    opacity: 1;
}

#controls-hint kbd {
    display: inline-block;
    padding: 0.2em 0.5em;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.9em;
}

.hint-tweakbox {
    color: var(--color-accent);
}

/* Loading Screen */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

#loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.loader-logo {
    width: 60px;
    height: 56px;
    filter: drop-shadow(0 0 20px var(--color-accent));
    animation: logoFloat 2s ease-in-out infinite 1.5s;
}

.loader-logo path {
    fill: rgba(255, 255, 255, 0.1);
    stroke: var(--color-accent);
    stroke-width: 0.5;
    stroke-dasharray: 300;
    stroke-dashoffset: 300;
    animation: logoDraw 1.2s ease-out forwards, logoFill 0.6s ease-out 1.2s forwards;
}

@keyframes logoDraw {
    0% {
        stroke-dashoffset: 300;
        fill: rgba(255, 255, 255, 0.05);
    }
    100% {
        stroke-dashoffset: 0;
        fill: rgba(255, 255, 255, 0.1);
    }
}

@keyframes logoFill {
    0% {
        fill: rgba(255, 255, 255, 0.1);
        stroke-width: 0.5;
        filter: drop-shadow(0 0 5px var(--color-accent));
    }
    100% {
        fill: var(--color-accent);
        stroke-width: 0;
        filter: drop-shadow(0 0 20px var(--color-accent));
    }
}

@keyframes logoFloat {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-10px) rotate(5deg);
    }
}

.loader-text {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 0;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.loader-bar {
    width: 200px;
    height: 2px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 1px;
    overflow: hidden;
}

.loader-progress {
    width: 0%;
    height: 100%;
    background: var(--color-accent);
    box-shadow: 0 0 10px var(--color-accent);
    transition: width 0.3s ease;
}

/* ==========================================================================
   Tweakbox
   ========================================================================== */

#tweakbox {
    position: fixed;
    top: 5rem;
    left: 2rem;
    width: 320px;
    max-height: calc(100vh - 7rem);
    background: rgba(10, 10, 11, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    z-index: 200;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all 0.4s var(--ease-out-expo);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

#tweakbox.hidden {
    opacity: 0;
    transform: translateX(-20px);
    pointer-events: none;
}

.tweakbox-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.3);
}

.tweakbox-header h3 {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
}

#tweakbox-close {
    width: 28px;
    height: 28px;
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    color: var(--color-text-muted);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    transition: all 0.2s ease;
}

#tweakbox-close:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.tweakbox-content {
    overflow-y: auto;
    padding: 0.5rem 0;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

.tweakbox-content::-webkit-scrollbar {
    width: 6px;
}

.tweakbox-content::-webkit-scrollbar-track {
    background: transparent;
}

.tweakbox-content::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.tweakbox-content::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Accordion Sections */
.tweak-section {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.tweak-section:last-child {
    border-bottom: none;
}

.tweak-accordion {
    width: 100%;
    padding: 0.875rem 1.25rem;
    background: none;
    border: none;
    color: var(--color-text);
    font-family: var(--font-primary);
    font-size: 0.875rem;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.tweak-accordion:hover {
    background: rgba(255, 255, 255, 0.03);
}

.tweak-accordion.active {
    color: var(--color-accent);
}

.accordion-icon {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--color-text-muted);
    transition: transform 0.3s var(--ease-out-expo);
}

.tweak-accordion.active .accordion-icon {
    transform: rotate(45deg);
    color: var(--color-accent);
}

.tweak-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s var(--ease-out-expo);
    background: rgba(0, 0, 0, 0.2);
}

.tweak-panel.active {
    max-height: 500px;
}

.tweak-panel > * {
    padding: 0.75rem 1.25rem;
}

/* Toggles */
.tweak-toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    transition: color 0.2s ease;
}

.tweak-toggle:hover {
    color: var(--color-text);
}

.tweak-toggle input[type="checkbox"] {
    appearance: none;
    width: 36px;
    height: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    position: relative;
    cursor: pointer;
    transition: background 0.2s ease;
}

.tweak-toggle input[type="checkbox"]::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: var(--color-text-muted);
    border-radius: 50%;
    transition: all 0.2s ease;
}

.tweak-toggle input[type="checkbox"]:checked {
    background: var(--color-accent);
}

.tweak-toggle input[type="checkbox"]:checked::before {
    left: 18px;
    background: var(--color-bg);
}

/* Sliders */
.tweak-slider {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.5rem;
    align-items: center;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.tweak-slider span:first-child {
    grid-column: 1 / -1;
}

.tweak-slider input[type="range"] {
    appearance: none;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    cursor: pointer;
}

.tweak-slider input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px var(--color-accent);
    transition: transform 0.2s ease;
}

.tweak-slider input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.tweak-slider input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 0 10px var(--color-accent);
}

.slider-value {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    min-width: 3em;
    text-align: right;
}

/* Color Picker */
.tweak-color {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.tweak-color input[type="color"] {
    appearance: none;
    width: 40px;
    height: 24px;
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    cursor: pointer;
    padding: 2px;
}

.tweak-color input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.tweak-color input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 2px;
}

/* Preset Buttons */
.presets-section .tweak-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 1rem 1.25rem;
}

.preset-btn {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    color: var(--color-text);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.preset-btn[data-preset="reset"] {
    border-color: rgba(255, 100, 100, 0.3);
    color: #ff6464;
}

.preset-btn[data-preset="reset"]:hover {
    background: rgba(255, 100, 100, 0.1);
    border-color: #ff6464;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
    #logo {
        top: 1rem;
        left: 1rem;
    }

    #menu-toggle {
        top: 1rem;
        right: 1rem;
    }

    #nav-panel {
        width: 100%;
    }

    #project-info {
        left: 1rem;
        right: 1rem;
        max-width: none;
    }

    #controls-hint {
        display: none;
    }

    #tweakbox {
        left: 1rem;
        right: 1rem;
        width: auto;
        max-height: 60vh;
    }
}

/* ==========================================================================
   Custom Cursor (Optional)
   ========================================================================== */

.custom-cursor {
    position: fixed;
    width: 20px;
    height: 20px;
    border: 1px solid var(--color-accent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transition: transform 0.1s ease, width 0.2s ease, height 0.2s ease;
    mix-blend-mode: difference;
}

.custom-cursor.hovering {
    width: 40px;
    height: 40px;
    border-color: var(--color-accent);
    background: rgba(208, 255, 0, 0.1);
}

/* ==========================================================================
   About Modal
   ========================================================================== */

.about-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.about-modal:not(.hidden) {
    pointer-events: all;
    opacity: 1;
}

.about-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    opacity: 0;
    transition: opacity 0.6s ease;
}

.about-modal:not(.hidden) .about-modal-overlay {
    opacity: 1;
}

.about-modal-content {
    position: relative;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    background: rgba(5, 5, 7, 0.85);
    backdrop-filter: blur(30px) saturate(180%);
    -webkit-backdrop-filter: blur(30px) saturate(180%);
    border-radius: 16px;
    overflow: hidden;
    transform: translateY(50px) scale(0.9);
    opacity: 0;
    transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Animated gradient border */
.about-modal-content::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    padding: 1px;
    background: linear-gradient(
        45deg,
        var(--color-accent),
        var(--color-accent-secondary),
        var(--color-accent)
    );
    -webkit-mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: borderGlow 3s ease-in-out infinite;
    pointer-events: none;
}

/* Mouse tracking radial glow */
.about-modal-content::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 16px;
    background: radial-gradient(
        400px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
        rgba(208, 255, 0, 0.15),
        transparent 40%
    );
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.about-modal:not(.hidden) .about-modal-content {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.about-modal:not(.hidden) .about-modal-content::after {
    opacity: 1;
}

.about-modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    background: rgba(5, 5, 7, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--color-text);
    font-size: 1.5rem;
    font-weight: 300;
    cursor: pointer;
    z-index: 100;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-modal-close:hover {
    background: rgba(208, 255, 0, 0.1);
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 0 30px rgba(208, 255, 0, 0.3);
}

.about-modal-inner {
    position: relative;
    padding: 3rem 2rem 2rem;
    overflow-y: auto;
    max-height: 80vh;
    z-index: 1;
}

/* Scanlines Effect */
.about-scanlines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.15) 0px,
        rgba(0, 0, 0, 0.15) 1px,
        transparent 1px,
        transparent 2px
    );
    pointer-events: none;
    opacity: 0.5;
    animation: scanlines 8s linear infinite;
}

@keyframes scanlines {
    0% { transform: translateY(0); }
    100% { transform: translateY(20px); }
}

/* Grid Overlay */
.about-grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(208, 255, 0, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(208, 255, 0, 0.03) 1px, transparent 1px);
    background-size: 20px 20px;
    pointer-events: none;
    opacity: 0.3;
}

/* Title */
.about-glitch-text {
    position: relative;
    margin-bottom: 2rem;
}

.about-title {
    font-family: var(--font-sans);
    font-size: 20px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.95);
    text-align: left;
    margin: 0 0 1.5rem 0;
    position: relative;
}

/* Content */
.about-content-wrapper {
    position: relative;
    z-index: 1;
}

.about-text {
    font-family: var(--font-sans);
    font-size: 12px;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.75);
    max-width: 700px;
    margin: 0 auto;
}

.about-text p {
    margin-bottom: 0.75rem;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-text strong {
    color: rgba(255, 255, 255, 0.95);
    font-weight: 600;
    display: block;
    margin-top: 8px;
}

.about-text ul {
    margin: 0.5rem 0 0.75rem 0;
    padding-left: 1.5rem;
}

.about-text li {
    color: rgba(255, 255, 255, 0.75);
}

/* Responsive */
@media (max-width: 768px) {
    .about-modal-content {
        width: 95%;
        max-height: 90vh;
    }

    .about-modal-inner {
        padding: 2.5rem 1.5rem 1.5rem;
    }

    .about-title {
        font-size: 18px;
    }

    .about-text {
        font-size: 11px;
    }
}