:root {
    --bg-color: #eff1f5;
    --mantle-color: #e6e9ef;
    --surface0-color: #ccd0da;
    --surface1-color: #bcc0cc;
    --text-color: #4c4f69;
    --subtext-color: #6c6f85;
    --heading-color: #179299;
    --glass-bg-rgb: 230, 233, 239;
    --glass-border-rgb: 188, 192, 204;
    --glass-bg: rgba(var(--glass-bg-rgb), 0.75);
    --glass-border: rgba(var(--glass-border-rgb), 0.6);
    --particle-color-rgb: 76, 79, 105;
    --intro-bg: var(--bg-color);
    --tooltip-bg: var(--surface0-color);
    --tooltip-text: var(--text-color);
    --hover-bg: rgba(156, 160, 176, 0.2);
    --col-green: #40a02b;
    --col-yellow: #df8e1d;
    --col-blue: #1e66f5;
}

[data-theme="dark"] {
    --bg-color: #1e1e2e;
    --mantle-color: #181825;
    --surface0-color: #313244;
    --surface1-color: #45475a;
    --text-color: #cdd6f4;
    --subtext-color: #a6adc8;
    --heading-color: #89b4fa;
    --glass-bg-rgb: 24, 24, 37;
    --glass-border-rgb: 69, 71, 90;
    --glass-bg: rgba(var(--glass-bg-rgb), 0.75);
    --glass-border: rgba(var(--glass-border-rgb), 0.4);
    --particle-color-rgb: 205, 214, 244;
    --intro-bg: var(--bg-color);
    --tooltip-bg: var(--surface0-color);
    --tooltip-text: var(--text-color);
    --hover-bg: rgba(108, 112, 134, 0.2);
    --col-green: #a6e3a1;
    --col-yellow: #f9e2af;
    --col-blue: #89b4fa;
}

::view-transition-old(root),
::view-transition-new(root) {
    animation: none;
    mix-blend-mode: normal;
}

body,
html {
    margin: 0;
    padding: 0;
    height: 100%;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Cormorant Garamond', serif;
    overflow: hidden;
    transition: background-color 0.5s ease, color 0.5s ease;
}

* {
    border-radius: 0 !important;
    box-sizing: border-box;
}

h1,
h2,
h4,
h5,
h6 {
    font-family: 'VT323', monospace;
    text-transform: uppercase;
    letter-spacing: 2px;
}

h3 {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 700;
    text-transform: none;
    letter-spacing: 0;
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background-color: var(--hover-bg);
}

.theme-icon {
    width: 24px;
    height: 24px;
    fill: var(--text-color);
    transition: fill 0.5s ease;
}

.intro-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--intro-bg);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 1.2s cubic-bezier(0.77, 0, 0.175, 1);
}

.greeting-text {
    font-family: 'Cormorant Garamond', 'Yu Mincho', 'YuMincho', 'Zen Old Mincho', 'Noto Serif Arabic', serif;
    font-size: 3rem;
    color: var(--text-color);
    opacity: 0;
    transition: opacity 0.5s ease;
    font-weight: 400;
}

.slide-up {
    transform: translateY(-100%);
}

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

.scroll-container {
    height: 100vh;
    width: 100%;
    overflow-y: scroll;
    scroll-snap-type: y mandatory;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
    position: relative;
    z-index: 10;
}

.scroll-container::-webkit-scrollbar {
    display: none;
}

section {
    height: 100vh;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    scroll-snap-align: start;
}

#home {
    background-color: transparent;
}

#experience {
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid var(--glass-border);
    transition: background-color 0.5s ease, border-color 0.5s ease;
}

h1 {
    font-size: 4.5rem;
    margin: 0;
    font-weight: 600;
    line-height: 1.1;
    color: var(--text-color);
}

h2 {
    font-size: 2.8rem;
    margin-bottom: 2rem;
    font-weight: 600;
    color: var(--text-color);
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    display: block;
    width: 40px;
    height: 2px;
    background: var(--heading-color);
    margin: 0.5rem auto 0;
}

p.subtitle {
    font-size: 1.8rem;
    margin-top: 1rem;
    font-weight: 300;
    font-style: italic;
    color: var(--subtext-color);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    text-align: left;
    max-width: 700px;
    width: 85%;
}

.skill-item {
    font-size: 1.5rem;
    border-bottom: 1px solid var(--subtext-color);
    padding-bottom: 0.8rem;
    color: var(--text-color);
    transition: border-color 0.5s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.skill-item:hover {
    border-color: var(--heading-color);
}

.skill-name {
    font-weight: 600;
}

.tag-wrapper {
    position: relative;
    display: inline-block;
    cursor: pointer;
}

.skill-tag {
    font-size: 1.1rem;
    font-family: 'VT323', monospace;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 5px 10px;
    font-weight: 400;
    color: var(--tag-color);
    background-color: color-mix(in srgb, var(--tag-color), transparent 85%);
    border: 1px solid color-mix(in srgb, var(--tag-color), transparent 70%);
    transition: background-color 0.3s ease;
}

.tag-proficient {
    --tag-color: var(--col-green);
}

.tag-comfortable {
    --tag-color: var(--col-yellow);
}

.tag-basic {
    --tag-color: var(--col-blue);
}

.skill-tooltip {
    visibility: hidden;
    opacity: 0;
    width: 220px;
    background-color: var(--tooltip-bg);
    color: var(--tooltip-text);
    text-align: center;
    border-radius: 8px;
    padding: 12px;
    position: absolute;
    bottom: 135%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    font-size: 1rem;
    font-family: 'Cormorant Garamond', serif;
    box-shadow: 0px 4px 15px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--glass-border);
    z-index: 100;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.skill-tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -6px;
    border-width: 6px;
    border-style: solid;
    border-color: var(--tooltip-bg) transparent transparent transparent;
}

.tag-wrapper:hover .skill-tag {
    background-color: color-mix(in srgb, var(--tag-color), transparent 75%);
}

.side-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 400px;
    max-width: 90%;
    height: 100%;
    background-color: var(--mantle-color);
    border-left: 1px solid var(--glass-border);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.3);
    z-index: 10002;
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.19, 1, 0.22, 1);
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.side-panel.panel-open {
    transform: translateX(0);
}

.panel-close {
    align-self: flex-end;
    background: none;
    border: none;
    color: var(--subtext-color);
    font-size: 2rem;
    cursor: pointer;
    padding: 0.5rem;
    line-height: 0.5;
    margin-bottom: 2rem;
    transition: color 0.3s ease;
}

.panel-close:hover {
    color: var(--col-red, #e78284);
}

.panel-title {
    font-family: 'VT323', monospace;
    font-size: 3rem;
    color: var(--heading-color);
    margin: 0 0 0.5rem 0;
    line-height: 1;
}

.panel-subtitle {
    font-size: 1.2rem;
    font-family: 'VT323', monospace;
    text-transform: uppercase;
    color: var(--subtext-color);
    border: 1px solid var(--subtext-color);
    padding: 2px 8px;
    align-self: flex-start;
    margin-bottom: 2rem;
    border-radius: 4px;
}

.panel-body {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.3rem;
    line-height: 1.6;
    color: var(--text-color);
}

.panel-body ul {
    padding-left: 1.5rem;
    margin-top: 1rem;
}

.panel-body li {
    margin-bottom: 0.5rem;
}

.side-panel-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10001;
    background-color: rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
}

.side-panel-overlay.active {
    opacity: 1;
    visibility: visible;
}

#portfolio {
    height: 100vh;
    overflow-y: auto;
    scrollbar-width: none;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid var(--glass-border);
    transition: background-color 0.5s ease, border-color 0.5s ease;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding: 20px;
}

#portfolio::-webkit-scrollbar {
    display: none;
}

.portfolio-layout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
    width: 100%;
    max-width: 1400px;
    margin-top: 2rem;
}

.orbital-container {
    position: relative;
    width: 400px;
    height: 400px;
    flex-shrink: 0;
}

.orbit {
    position: absolute;
    border: 2px solid var(--subtext-color);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: border-color 0.3s ease;
}

.orbit-1 {
    width: 120px;
    height: 120px;
}

.orbit-2 {
    width: 200px;
    height: 200px;
}

.orbit-3 {
    width: 280px;
    height: 280px;
}

.orbit-4 {
    width: 360px;
    height: 360px;
}

.lang-icon {
    position: absolute;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--surface0-color);
    border: 2px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'VT323', monospace;
    font-size: 1.5rem;
    text-transform: uppercase;
    color: var(--text-color);
    z-index: 10;
}

.lang-icon:hover {
    transform: scale(1.2);
    background-color: var(--heading-color);
    color: var(--bg-color);
    border-color: var(--heading-color);
}

.lang-icon.active {
    background-color: var(--heading-color);
    color: var(--bg-color);
    border-color: var(--heading-color);
    box-shadow: 0 0 20px rgba(var(--particle-color-rgb), 0.4);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%,
    100% {
        box-shadow: 0 0 10px rgba(var(--particle-color-rgb), 0.3);
    }
    50% {
        box-shadow: 0 0 25px rgba(var(--particle-color-rgb), 0.6);
    }
}

.orbital-core {
    position: absolute;
    width: 60px;
    height: 60px;
    background: var(--heading-color);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 20;
}

.orbital-core:hover {
    transform: translate(-50%, -50%) scale(1.1);
}

.orbital-core span {
    font-family: 'VT323', monospace;
    font-size: 0.7rem;
    color: var(--bg-color);
    text-transform: uppercase;
}

.orbital-core.inactive {
    background: transparent;
    border: 2px solid var(--subtext-color);
}

.orbital-core.inactive span {
    color: var(--subtext-color);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    flex: 1;
    max-width: 600px;
}

.project-card {
    background-color: var(--glass-bg);
    border: 2px solid var(--glass-border);
    padding: 1.5rem;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    position: relative;
    cursor: pointer;
    min-height: 180px;
    justify-content: space-between;
}

.project-card::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.project-card:hover::after {
    bottom: -20px;
}

.project-card.filtered-out {
    opacity: 0.2;
    transform: scale(0.95);
    pointer-events: none;
}

.project-card:not(.filtered-out):hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.2);
    border-color: var(--heading-color);
}

.project-card.highlighted {
    border-color: var(--heading-color);
    box-shadow: 0 0 20px rgba(var(--particle-color-rgb), 0.2);
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    z-index: 10001;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--mantle-color);
    border: 1px solid var(--glass-border);
    width: 90%;
    max-width: 600px;
    padding: 2.5rem;
    position: relative;
    transform: translateY(20px) scale(0.95);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    max-height: 85vh;
    overflow-y: auto;
}

.modal-active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: none;
    border: none;
    color: var(--subtext-color);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    line-height: 1;
    transition: color 0.3s ease;
}

.modal-close:hover {
    color: var(--col-red, #e78284);
}

.modal-body-title {
    font-family: 'VT323', monospace;
    font-size: 2.5rem;
    color: var(--heading-color);
    margin: 0 0 0.5rem 0;
}

.click-hint {
    font-size: 0.9rem;
    color: var(--subtext-color);
    margin-top: auto;
    opacity: 0.7;
    font-style: italic;
    text-align: center;
    display: block;
    width: 100%;
}

.project-card .full-details {
    display: none;
}

.modal-tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--surface1-color);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--heading-color);
    margin: 0;
}

.status-badge {
    font-size: 0.85rem;
    font-family: 'VT323', monospace;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 3px 6px;
    font-weight: bold;
    background-color: color-mix(in srgb, var(--col-green), transparent 80%);
    color: var(--col-green);
    border: 1px solid color-mix(in srgb, var(--col-green), transparent 50%);
}

.project-desc {
    font-size: 1.1rem;
    color: var(--subtext-color);
    font-family: 'Cormorant Garamond', serif;
    line-height: 1.4;
}

.project-disclaimer {
    font-size: 0.9rem;
    font-style: italic;
    color: var(--subtext-color);
    opacity: 0.8;
    margin-top: 0.5rem;
    border-left: 2px solid var(--col-yellow);
    padding-left: 10px;
}

.project-tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: auto;
    padding-top: 0.8rem;
}

.tech-tag {
    font-size: 0.8rem;
    font-family: 'VT323', monospace;
    text-transform: uppercase;
    padding: 3px 6px;
    font-weight: bold;
    color: var(--text-color);
    background-color: var(--surface0-color);
    border: 1px solid var(--surface1-color);
}

.filter-indicator {
    text-align: center;
    font-family: 'VT323', monospace;
    font-size: 1.2rem;
    color: var(--heading-color);
    margin-bottom: 1rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.filter-indicator.visible {
    opacity: 1;
}

.skip-hint {
    position: absolute;
    bottom: 15%;
    font-family: 'VT323', monospace;
    font-size: 1rem;
    color: var(--subtext-color);
    text-transform: uppercase;
    letter-spacing: 2px;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.skip-hint.visible {
    opacity: 0.6;
}

.nav-dots {
    position: fixed;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 18px;
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.nav-dots.visible {
    opacity: 1;
    pointer-events: auto;
}

.nav-dot {
    width: 10px;
    height: 10px;
    border: 2px solid var(--subtext-color);
    background: transparent;
    display: block;
    position: relative;
    text-decoration: none;
    transition: all 0.3s ease;
}

.nav-dot.active {
    background: var(--heading-color);
    border-color: var(--heading-color);
}

.nav-dot:hover {
    border-color: var(--heading-color);
}

.nav-label {
    position: absolute;
    right: 22px;
    top: 50%;
    transform: translateY(-50%) translateX(5px);
    font-family: 'VT323', monospace;
    font-size: 0.95rem;
    color: var(--text-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.2s ease, transform 0.2s ease;
    pointer-events: none;
    background: var(--mantle-color);
    padding: 2px 8px;
    border: 1px solid var(--glass-border);
}

.nav-dot:hover .nav-label {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
}

#contact {
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid var(--glass-border);
    transition: background-color 0.5s ease, border-color 0.5s ease;
}

.contact-links {
    display: flex;
    gap: 3rem;
    margin-top: 2rem;
}

.contact-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
    text-decoration: none;
    color: var(--subtext-color);
    transition: color 0.3s ease, transform 0.3s ease;
    font-family: 'VT323', monospace;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-link i,
.contact-link .contact-icon {
    font-size: 2rem;
    width: 2rem;
    height: 2rem;
    fill: currentColor;
}

.contact-link:hover {
    color: var(--heading-color);
    transform: translateY(-3px);
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    #node-canvas {
        display: none !important;
    }

    .intro-overlay {
        display: none !important;
    }

    .scroll-container {
        scroll-behavior: auto;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2.2rem; }
    p.subtitle { font-size: 1.4rem; }

    .skills-grid {
        grid-template-columns: 1fr;
        gap: 1.2rem;
        max-width: 500px;
    }

    .portfolio-layout {
        flex-direction: column;
        gap: 2rem;
    }

    .orbital-container {
        width: 280px;
        height: 280px;
    }

    .orbit-1 { width: 90px; height: 90px; }
    .orbit-2 { width: 150px; height: 150px; }
    .orbit-3 { width: 210px; height: 210px; }

    .lang-icon {
        width: 34px;
        height: 34px;
        font-size: 1.2rem;
    }

    .lang-icon[data-lang="C++"] {
        left: calc(50% + 45px) !important;
    }
    .lang-icon[data-lang="Python"] {
        top: calc(50% - 75px) !important;
    }
    .lang-icon[data-lang="Node.Js"] {
        left: calc(50% - 105px) !important;
    }

    .orbital-core {
        width: 46px;
        height: 46px;
    }

    .projects-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        width: 90%;
    }

    .project-card { min-height: 140px; }
    .contact-links { gap: 2rem; }

    .nav-dots { right: 12px; gap: 14px; }
    .nav-dot { width: 8px; height: 8px; }
}

@media (max-width: 480px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    p.subtitle { font-size: 1.2rem; }

    .skill-item { font-size: 1.2rem; }
    .skill-tag { font-size: 0.9rem; padding: 3px 6px; }

    .orbital-container { display: none; }
    .filter-indicator { display: none; }

    .projects-grid {
        grid-template-columns: 1fr;
        width: 95%;
    }

    .project-card {
        padding: 1rem;
        min-height: auto;
    }

    .click-hint { display: none; }

    .contact-links { gap: 1.5rem; }
    .contact-link { font-size: 0.95rem; }
    .contact-link i,
    .contact-link .contact-icon {
        font-size: 1.6rem;
        width: 1.6rem;
        height: 1.6rem;
    }

    .side-panel {
        width: 100%;
        max-width: 100%;
        padding: 1.5rem;
    }

    .modal-content {
        padding: 1.5rem;
        width: 95%;
    }

    .nav-dots { right: 8px; gap: 12px; }
    .nav-dot { width: 7px; height: 7px; }
    .nav-label { display: none; }

    .greeting-text { font-size: 2.2rem !important; }

    #portfolio { padding: 15px; }
}