/* ==========================================================================
   1. Variables & Reset
   ========================================================================== */
* {
    box-sizing: border-box;
}

:root {
    --clr-blue: #58a6ff;
    --clr-border: #e6edf3;
    --clr-orange: #ec8e2c;
    --clr-pink: #bc8cff;
    --clr-primary-bg: #ffffff;
    --clr-primary-txt: #24292f;
    --clr-green: #2ea043;
    --crt-red: rgb(218, 49, 49);
    --crt-green: rgb(112, 159, 115);
    --crt-blue: rgb(40, 129, 206);
}

[data-theme="dark"] {
    --clr-blue: #58a6ff;
    --clr-border: #8090a8;
    --clr-orange: #ec8e2c;
    --clr-pink: #bc8cff;
    --clr-primary-bg: #0d1117;
    --clr-primary-txt: #c9d1d9;
    --clr-green: #3fb950;
}

html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow-x: hidden;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--clr-primary-bg);
    color: var(--clr-primary-txt);
    font-family: "Fira Mono", monospace, sans-serif;
}

/* ==========================================================================
   2. Typography & Utilities
   ========================================================================== */
.text-output {
    margin: 0;
    line-height: 1.35rem;
    word-break: break-word;
}

.text-output a {
    color: var(--clr-pink);
    text-decoration: underline;
}

.text-output a:hover {
    color: var(--clr-orange);
    text-decoration: underline;
}

.text-blue {
    color: var(--clr-blue);
}

.text-orange {
    color: var(--clr-orange);
}

.blink {
    animation: blink 1s infinite;
    color: var(--clr-orange);
    font-size: 1.2rem;
    font-weight: bold;
    margin: 0;
}

@keyframes blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0;
    }
}

@keyframes pulse {
    0% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }

    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* ==========================================================================
   3. Layout & Global Components
   ========================================================================== */
#main-container {
    position: relative;
    border: 1px solid transparent;
    max-width: 800px;
    width: calc(100% - 2rem);
    margin: 1rem;
    padding: 0;
    background: var(--clr-primary-bg);
    height: 95%;
    display: flex;
    flex-direction: column;
}

/* Border Drawing Animation */
.border-line {
    position: absolute;
    background: var(--clr-border);
    z-index: 10;
}

.border-top {
    top: 0;
    left: 0;
    height: 1px;
    width: 0;
    animation: draw-horizontal 0.4s ease-out 0.1s forwards;
}

.border-right {
    top: 0;
    right: 0;
    width: 1px;
    height: 0;
    animation: draw-vertical 0.4s ease-out 0.5s forwards;
}

.border-bottom {
    bottom: 0;
    right: 0;
    height: 1px;
    width: 0;
    animation: draw-horizontal-reverse 0.4s ease-out 0.9s forwards;
}

.border-left {
    bottom: 0;
    left: 0;
    width: 1px;
    height: 0;
    animation: draw-vertical-reverse 0.4s ease-out 1.3s forwards;
}

@keyframes draw-horizontal {
    to { width: 100%; }
}

@keyframes draw-horizontal-reverse {
    to { width: 100%; }
}

@keyframes draw-vertical {
    to { height: 100%; }
}

@keyframes draw-vertical-reverse {
    to { height: 100%; }
}

.main-inner {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    opacity: 0;
    animation: fade-in 0.6s ease-out 0.8s forwards;
}

@keyframes fade-in {
    to { opacity: 1; }
}

/* Reduced motion: skip animations */
@media (prefers-reduced-motion: reduce) {
    .border-line {
        animation: none;
    }
    .border-top, .border-bottom {
        width: 100%;
    }
    .border-right, .border-left {
        height: 100%;
    }
    .main-inner {
        opacity: 1;
        animation: none;
    }
    .tabs::after {
        width: 100%;
        animation: none;
    }
    .nav-group-left,
    .nav-group-right {
        opacity: 1;
        animation: none;
    }
    .content {
        overflow-y: auto;
    }
}

.content {
    flex: 1;
    overflow-y: hidden;
    scrollbar-gutter: stable;
}

.content.scrollable {
    overflow-y: auto;
}

/* Custom scrollbar with fade-in */
.content::-webkit-scrollbar {
    width: 8px;
}

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

.content::-webkit-scrollbar-thumb {
    background: transparent;
    border-radius: 4px;
    transition: background 0.3s ease;
}

.content.scrollable::-webkit-scrollbar-thumb {
    background: var(--clr-border);
}

.content.scrollable::-webkit-scrollbar-thumb:hover {
    background: var(--clr-blue);
}

.tab-content {
    display: none;
    padding: 0 1.5rem 1.5rem 1.5rem;
}

.tab-content.active {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Section Headers */
.tab-content h2.text-output {
    margin-top: 2rem;
}

.tab-content h2.text-output:first-of-type {
    margin-top: 0.5rem;
}

#contact {
    display: none !important;
}

.text-container {
    flex-direction: row;
    display: flex;
    gap: 1rem;
}

.profile-pic {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    cursor: pointer;
}

/* Social Icons in Nav */
.nav-social-link {
    display: flex;
    align-items: center;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.nav-social-link:hover {
    opacity: 1;
}

.nav-social-icon {
    width: 20px;
    height: 20px;
    filter: grayscale(1);
    transition: filter 0.2s;
}

.nav-social-link:hover .nav-social-icon {
    filter: grayscale(0);
}

/* --- CRT Effect --- */
.crt {
    text-shadow: 0 0 0.1em currentColor,
        1px 1px rgba(255, 0, 255, var(--crt-opacity)),
        -1px -1px rgba(0, 255, 255, var(--crt-opacity));
    position: relative;
    transition: text-shadow 0.15s ease-out;
}

.crt:before,
.crt:after {
    content: "";
    transform: translateZ(0);
    pointer-events: none;
    mix-blend-mode: overlay;
    -webkit-mix-blend-mode: overlay;
    opacity: var(--crt-opacity, 0);
    position: absolute;
    height: 100%;
    width: 100%;
    left: 0;
    top: 0;
    z-index: 1;
    transition: opacity 0.15s ease-out;
}

body.crt {
    background-color: var(--clr-primary-bg);
}

body.crt[data-theme="dark"] {
    background-color: rgb(25, 25, 30);
}

.crt:before {
    background: repeating-linear-gradient(var(--crt-red) 0px, var(--crt-green) 2px, var(--crt-blue) 4px);
}

.crt:after {
    background: repeating-linear-gradient(90deg, var(--crt-red) 1px, var(--crt-green) 2px, var(--crt-blue) 3px);
}

.scanline {
    width: 100%;
    height: 100px;
    z-index: 10;
    background: linear-gradient(0deg, rgba(0, 0, 0, 0) 0%, rgba(255, 255, 255, 0.2) 50%, rgba(0, 0, 0, 0) 100%);
    opacity: 0.1;
    position: absolute;
    bottom: 100%;
    animation: scanline 8s linear infinite;
    pointer-events: none;
    display: none;
}

body.crt .scanline {
    display: block;
}

@keyframes scanline {
    0% {
        bottom: 100%;
    }

    100% {
        bottom: -100%;
    }
}

@media (prefers-reduced-motion: reduce) {

    .crt:before,
    .crt:after {
        display: none;
    }
}

/* ==========================================================================
   4. Navigation & Controls
   ========================================================================== */
.tabs {
    position: sticky;
    top: 0;
    background-color: var(--clr-primary-bg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid transparent;
    padding: 0 1rem;
}

.tabs::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 1px;
    width: 0;
    background: var(--clr-border);
    animation: draw-horizontal 0.3s ease-out 1.7s forwards;
}

.nav-group-left,
.nav-group-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
    animation: fade-in 0.4s ease-out 1.7s forwards;
}

/* Nav Logo */
.nav-logo {
    color: var(--clr-primary-txt);
    font-size: 1.1rem;
    font-weight: bold;
}

/* CRT Control Slider */
.crt-control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--clr-primary-txt);
}

.crt-control input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 60px;
    height: 4px;
    background: var(--clr-border);
    border-radius: 0;
    outline: none;
}

.crt-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 8px;
    height: 14px;
    background: var(--clr-blue);
    border-radius: 0;
    cursor: pointer;
    box-shadow: 0 0 5px var(--clr-blue);
}

.crt-control input[type="range"]::-moz-range-thumb {
    width: 12px;
    height: 18px;
    background: var(--clr-blue);
    border-radius: 0;
    cursor: pointer;
    border: none;
    box-shadow: 0 0 5px var(--clr-blue);
}

/* Theme Switcher */
#theme-switch-container {
    display: flex;
    align-items: center;
    font-size: 1rem;
    color: var(--clr-primary-txt);
    height: 32px;
    z-index: 1;
    margin-left: auto;
}

#theme-switch-checkbox {
    display: none;
}

.theme-switch {
    cursor: pointer;
    display: flex;
    align-items: center;
}

#theme-switch-checkbox:not(:checked)+.theme-switch:hover .light-mode {
    display: none;
}

#theme-switch-checkbox:not(:checked)+.theme-switch:hover .dark-mode {
    display: inline;
}

#theme-switch-checkbox:checked+.theme-switch:hover .light-mode {
    display: inline;
}

#theme-switch-checkbox:checked+.theme-switch:hover .dark-mode {
    display: none;
}

#theme-switch-checkbox:checked+.theme-switch .light-mode {
    display: none;
}

#theme-switch-checkbox:checked+.theme-switch .dark-mode {
    display: inline;
}

.light-mode {
    display: inline;
}

.dark-mode {
    display: none;
}

/* ==========================================================================
   5. ASCII Art
   ========================================================================== */
.ascii-container {
    position: relative;
    display: inline-block;
}

.ascii-banner {
    font-size: 0.75rem;
    line-height: 1.1;
}

.ascii-line {
    display: flex;
}

.ascii-full,
.ascii-medium,
.ascii-small {
    display: none;
}

.terminal-icon {
    animation: blink 1s infinite;
    color: var(--clr-primary-txt);
    display: inline-block;
    line-height: 1.1;
    white-space: pre;
    vertical-align: top;
}

/* ==========================================================================
   6. Timeline Component
   ========================================================================== */
.timeline {
    border-left: 1px solid var(--clr-border);
    padding-left: 1.5rem;
}

.timeline-item {
    margin-bottom: 0.5rem;
}

.timeline-item-header {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    color: var(--clr-orange);
    cursor: pointer;
    padding: 0.5rem 0;
}

.timeline-item-header:hover h3 {
    color: var(--clr-orange);
}

.timeline-logo {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 4px;
    filter: sepia(0.5) grayscale(0.2);
    transition: filter 0.2s;
}

.timeline-item-header:hover .timeline-logo,
.timeline-item-header.open .timeline-logo {
    filter: none;
}

.timeline-header-info {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.timeline-item-title {
    color: var(--clr-blue);
    margin: 0;
    font-size: 1.1rem;
    line-height: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.timeline-header-top {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

/* Timeline Skills Tags */
.timeline-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.timeline-skill-tag {
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    border: 1px solid var(--clr-border);
    color: var(--clr-primary-txt);
    opacity: 0.8;
}

.timeline-link-tag {
    text-decoration: none;
    cursor: pointer;
    border-color: var(--clr-blue);
    color: var(--clr-blue);
    opacity: 1;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.timeline-link-tag:hover {
    background-color: var(--clr-blue);
    color: var(--clr-primary-bg);
}

.timeline-item-header:hover .timeline-item-title::before {
    color: var(--clr-orange);
}

.timeline-item-date {
    font-size: 0.9rem;
    color: var(--clr-primary-txt);
}

.timeline-item-initial-summary {
    margin-top: 0.5rem;
    font-size: 1rem;
    color: var(--clr-primary-txt);
}

.timeline-item-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.timeline-item-body ul {
    list-style-type: '→ ';
    padding-left: 1rem;
}

.timeline-item-body ul li {
    margin-bottom: 0.5rem;
}

.sub-timeline {
    margin-top: 1rem;
    border-left: 2px solid var(--clr-border);
    padding-left: 1rem;
    padding-right: 1rem;
}

/* ==========================================================================
   6b. Skills Section
   ========================================================================== */
.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.skill-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--clr-border);
    font-size: 0.9rem;
    transition: border-color 0.2s, color 0.2s;
}

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

.skill-item i {
    font-size: 1.25rem;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.skill-item:hover i {
    opacity: 1;
}

a.skill-item {
    text-decoration: none;
    color: var(--clr-primary-txt);
    cursor: pointer;
}

/* ==========================================================================
   6c. Experiments Section
   ========================================================================== */
.experiments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.experiment-card {
    display: block;
    padding: 1rem;
    border: 1px solid var(--clr-border);
    text-decoration: none;
    color: var(--clr-primary-txt);
    transition: border-color 0.2s, transform 0.2s;
    position: relative;
}

.experiment-card:hover {
    border-color: var(--clr-blue);
    transform: translateY(-2px);
}

.experiment-header {
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.experiment-title {
    font-weight: bold;
    color: var(--clr-blue);
    padding-right: 5.5rem;
    line-height: 1.2;
    overflow-wrap: break-word;
    word-break: break-word;
}

.experiment-lang {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 0.75rem;
    padding: 0.15rem 0.4rem;
    border: 1px solid var(--clr-border);
    color: var(--clr-orange);
    background-color: var(--clr-primary-bg);
}

.experiment-desc {
    margin: 0;
    font-size: 0.85rem;
    line-height: 1.4;
    opacity: 0.85;
}

/* ==========================================================================
   6d. Contact Section
   ========================================================================== */
.contact-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.contact-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    border: 1px solid var(--clr-border);
    text-decoration: none;
    color: var(--clr-primary-txt);
    transition: border-color 0.2s, transform 0.2s;
}

.contact-item:hover {
    border-color: var(--clr-blue);
    transform: translateX(4px);
}

.contact-label {
    font-weight: bold;
    color: var(--clr-blue);
}

.contact-value {
    opacity: 0.85;
}

@media (max-width: 480px) {
    .contact-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }

    .contact-value {
        font-size: 0.9rem;
        word-break: break-all;
    }
}

/* Nav social links hide animation */
.nav-social-link {
    transition: opacity 0.3s, transform 0.3s;
}

.nav-social-link.hidden {
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
}

.timeline-item-location {
    display: block;
    font-size: 0.8rem;
    color: var(--clr-primary-txt);
}

/* ==========================================================================
   7. Game Component
   ========================================================================== */
#game-container {
    margin-top: 1.5rem;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
    border: 1px solid var(--clr-border);
    padding: 10px;
    font-family: "Fira Mono", monospace;
    position: relative;
    width: 100%;
}

#game-canvas {
    width: 100%;
    height: 250px;
    background-color: var(--clr-primary-bg);
    border-bottom: 2px dashed var(--clr-border);
    position: relative;
    overflow: hidden;
}

#player {
    width: 40px;
    height: 40px;
    background-color: var(--clr-blue);
    position: absolute;
    bottom: 0;
    left: 20px;
    transition: height 0.1s;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 32px;
    line-height: 1;
    will-change: transform;
}

/* Character Selector */
.char-select-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 0.5rem;
    min-height: 70px;
    /* Reduced to fit better */
    justify-content: center;
}

.char-select-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.player-preview {
    width: 40px;
    height: 40px;
    border: 2px solid var(--clr-blue);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 32px;
    background-color: transparent;
}

.retro-input {
    background: var(--clr-primary-bg);
    border: 1px solid var(--clr-blue);
    color: var(--clr-primary-txt);
    font-family: "Fira Mono", monospace;
    padding: 5px;
    margin-top: 5px;
    width: 150px;
    font-size: 0.8rem;
    text-align: center;
}

.retro-input:focus {
    outline: none;
    border-color: var(--clr-orange);
}

.obstacle {
    width: 20px;
    height: 20px;
    background-color: var(--clr-red, rgb(218, 49, 49));
    position: absolute;
    bottom: 0;
    right: -30px;
    will-change: transform;
}

#game-ui {
    margin: 0.5rem 0.5rem 0rem 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    flex-wrap: wrap;
}

#game-message,
#game-start-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 0.8rem 1.5rem;
    text-align: center;
    width: 85%;
    max-width: 300px;
}

#game-start-overlay p {
    margin: 0 0 0.5rem 0;
}

#game-message {
    display: none;
}

#game-start-overlay {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.collectible {
    width: 30px;
    height: 30px;
    position: absolute;
    bottom: 0;
    font-size: 24px;
    font-weight: bold;
    color: var(--clr-orange);
    display: flex;
    align-items: center;
    justify-content: center;
    will-change: transform;
    transition: opacity 0.2s, transform 0.2s;
}

.retro-btn {
    background: transparent;
    border: 2px solid var(--clr-blue);
    color: var(--clr-blue);
    font-family: "Fira Mono", monospace;
    padding: 0.5rem 1rem;
    cursor: pointer;
    margin-top: 0.5rem;
    font-weight: bold;
}

.retro-btn-small {
    padding: 0.3rem 0.6rem;
    font-size: 0.8rem;
    background: transparent;
    border: 2px solid var(--clr-blue);
    color: var(--clr-blue);
    font-family: "Fira Mono", monospace;
    cursor: pointer;
    font-weight: bold;
}

.retro-btn:hover {
    background: var(--clr-blue);
    color: var(--clr-primary-bg);
}

.confetti-particle {
    position: absolute;
    user-select: none;
    pointer-events: none;
    z-index: 15;
    font-weight: bold;
    will-change: transform, opacity;
}

/* ==========================================================================
   8. Media Queries
   ========================================================================== */
@media (min-width: 565px) {
    .ascii-full {
        display: block;
    }
}

@media (min-width: 346px) and (max-width: 564px) {
    .ascii-medium {
        display: block;
    }

    .ascii-banner {
        font-size: 0.65rem;
    }

    .profile-pic {
        display: none;
    }
}

@media (max-width: 345px) {
    .ascii-small {
        display: block;
    }

    .profile-pic {
        display: none;
    }
}

@media (max-width: 600px) {
    #mobile-controls {
        display: flex !important;
    }
}