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

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #ffffff;
    --text-primary: #000000;
    --text-secondary: #333333;
    --border-color: #000000;
    --hover-bg: #f0f0f0;
    --gray-light: #e0e0e0;
    --gray-medium: #cccccc;
    --shadow: rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] {
    --bg-primary: #000000;
    --bg-secondary: #000000;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --border-color: #ffffff;
    --hover-bg: #f0f0f0;
    --gray-light: #e0e0e0;
    --gray-medium: #cccccc;
    --shadow: rgba(255, 255, 255, 0.2);
}

body {
    font-family: 'Courier New', monospace;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Navigation Bar */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 0;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.nav-container {
    display: flex;
    height: 50px;
    align-items: stretch;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0 30px;
    border-right: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.3s, border-color 0.3s;
    text-transform: uppercase;
    font-size: 14px;
    letter-spacing: 1px;
}

.nav-item:hover {
    background-color: var(--hover-bg);
}

.nav-item:first-child {
    min-width: 100px;
}

.nav-item.social {
    margin-left: auto;
    border-left: 1px solid var(--border-color);
    border-right: none;
    padding: 0 20px;
    min-width: 60px;
    justify-content: center;
}

.nav-item.info {
    min-width: 120px;
}

.nav-item.projects {
    min-width: 150px;
}

.nav-item.blog {
    min-width: 100px;
}

.nav-item.theme-toggle {
    min-width: 60px;
    padding: 0 20px;
    font-size: 18px;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 80px 20px 40px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero-title {
    font-size: clamp(36px, 5vw, 64px);
    font-weight: normal;
    text-align: center;
    line-height: 1.3;
    letter-spacing: 2px;
    margin-bottom: 40px;
    max-width: 1200px;
    color: #ffffff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
    transition: color 0.3s ease;
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.8;
    max-width: 900px;
    text-align: left;
    font-family: 'Courier New', monospace;
    padding: 0 20px;
    color: #ffffff;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.8);
    transition: color 0.3s ease;
}

/* Projects Section */
.projects-section {
    padding: 80px 20px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.section-title {
    font-size: 24px;
    margin-bottom: 40px;
    letter-spacing: 2px;
    transition: color 0.3s ease;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.project-card {
    height: 300px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px var(--shadow);
}

.project-card:nth-child(1) {
    background: repeating-linear-gradient(
        45deg,
        var(--bg-primary),
        var(--bg-primary) 10px,
        var(--text-primary) 10px,
        var(--text-primary) 20px
    );
}

.project-card:nth-child(2) {
    background: repeating-linear-gradient(
        -45deg,
        var(--bg-primary),
        var(--bg-primary) 5px,
        var(--gray-light) 5px,
        var(--gray-light) 10px
    );
}

.project-card:nth-child(3) {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* Project Card with Image */
.project-with-image {
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    background-color: #000000;
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    transition: background 0.3s ease;
    z-index: 5;
}

.project-with-image:hover .project-overlay {
    background: rgba(0, 0, 0, 0.85);
}

/* Project Card Content */
.project-content {
    position: relative;
    z-index: 10;
    padding: 30px;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: transparent;
    transition: background-color 0.3s ease;
}

.project-card:not(.project-with-image) .project-content {
    background: var(--bg-primary);
}

.project-title {
    font-size: 24px;
    font-weight: normal;
    margin-bottom: 15px;
    letter-spacing: 2px;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.project-with-image .project-title {
    color: #ffffff;
}

.project-description {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 10px;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.project-with-image .project-description {
    color: #cccccc;
}

.project-tech {
    font-size: 12px;
    letter-spacing: 1px;
    margin-bottom: 20px;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
    transition: color 0.3s ease;
}

.project-with-image .project-tech {
    color: #aaaaaa;
}

.project-link {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 2px;
    text-decoration: none;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 10px 20px;
    transition: all 0.3s ease;
    width: fit-content;
}

.project-with-image .project-link {
    color: #ffffff;
    border-color: #ffffff;
}

.project-link:hover {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

.project-with-image .project-link:hover {
    background: #ffffff;
    color: #000000;
    border-color: #ffffff;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
    transition: opacity 0.3s ease;
    z-index: 20;
}

.scroll-indicator::after {
    content: '↓';
    font-size: 24px;
    color: #ffffff;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.8);
    transition: color 0.3s ease;
}

/* Blog Section */
.blog-section {
    padding: 80px 20px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.blog-post {
    border: 1px solid var(--border-color);
    padding: 30px;
    background: var(--bg-primary);
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s, background-color 0.3s;
    cursor: pointer;
}

.blog-post:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px var(--shadow);
    background: var(--hover-bg);
}

.blog-date {
    font-size: 12px;
    letter-spacing: 2px;
    margin-bottom: 15px;
    color: var(--text-secondary);
    text-transform: uppercase;
    transition: color 0.3s ease;
}

.blog-title {
    font-size: 20px;
    font-weight: normal;
    margin-bottom: 15px;
    letter-spacing: 1px;
    line-height: 1.4;
    transition: color 0.3s ease;
}

.blog-excerpt {
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 20px;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.blog-link {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 2px;
    text-decoration: none;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 2px;
    transition: color 0.3s ease, border-color 0.3s ease;
}

.blog-link:hover {
    border-bottom: 2px solid var(--text-primary);
}

@media (max-width: 768px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }
}

.blog-loading,
.blog-error {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    font-size: 16px;
    letter-spacing: 1px;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.blog-error {
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    transition: color 0.3s ease, border-color 0.3s ease;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        overflow-x: auto;
    }

    .nav-item {
        padding: 0 15px;
        font-size: 12px;
        white-space: nowrap;
    }

    .hero-title {
        font-size: 28px;
        letter-spacing: 1px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

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

/* Additional Details Section */
.details-section {
    padding: 80px 20px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    max-width: 1200px;
    margin: 0 auto;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.details-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.details-column h3 {
    font-size: 20px;
    margin-bottom: 20px;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    transition: border-color 0.3s ease;
}

.details-column ul {
    list-style: none;
}

.details-column li {
    padding: 10px 0;
    border-bottom: 1px dashed var(--gray-medium);
    font-size: 14px;
    transition: border-color 0.3s ease;
}

/* Tooltip Styles */
.has-tooltip {
    position: relative;
    cursor: help;
}

.has-tooltip::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background-color: var(--text-primary);
    color: var(--bg-primary);
    padding: 12px 16px;
    border-radius: 4px;
    font-size: 12px;
    line-height: 1.5;
    white-space: normal;
    width: 300px;
    max-width: 80vw;
    text-align: left;
    opacity: 0;
    pointer-events: none;
    z-index: 1000;
    transition: opacity 0.3s ease, transform 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.has-tooltip::after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(5px);
    border: 6px solid transparent;
    border-top-color: var(--text-primary);
    opacity: 0;
    pointer-events: none;
    z-index: 1001;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.has-tooltip:hover::before,
.has-tooltip:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

@media (max-width: 768px) {
    .details-content {
        grid-template-columns: 1fr;
    }

    .has-tooltip::before {
        width: 250px;
    }
}

/* Footer */
footer {
    background: var(--bg-primary);
    border-top: 2px solid var(--border-color);
    padding: 30px 20px;
    text-align: center;
    font-size: 14px;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* ............................................................... */
/* Retro Background Animation */
/* ............................................................... */
#retrobg {
    position: absolute;
    overflow: hidden;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    color: #a3c;
    background-color: #000;
}

/* ............................................................... */
#retrobg-sky {
    position: absolute;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    top: 0;
    width: 100%;
    height: 55%;
    background: linear-gradient( #214 75%, #249 );
}

/* ............................................................... */
#retrobg-sunWrap {
    position: relative;
    width: 40%;
    margin-bottom: -15%;
}
#retrobg-sun {
    --glow-color: #d44;
    padding-top: 100%;
    border-radius: 50%;
    background-image: linear-gradient( #fcdf11, #ff623f, #fe2085 50% );
    box-shadow: 0 0 160px 80px var( --glow-color );
    animation: 2s ease infinite alternate retrobg-sun-glow-anim;
}
.retrobg-shutdown #retrobg-sun {
    background-image: linear-gradient( #000, #000 40% );
    --glow-color: #000;
}
@keyframes retrobg-sun-glow-anim {
    from { box-shadow: 0 0 160px 80px var( --glow-color ); }
    to   { box-shadow: 0 0 200px 95px var( --glow-color ); }
}

/* ............................................................... */
#retrobg-stars {
    position: absolute;
    width: 100%;
    height: 100%;
}
.retrobg-star {
    position: absolute;
    border-radius: 50%;
    width: 2px;
    height: 2px;
    background-color: #fff;
}

/* ............................................................... */
#retrobg-mountains {
    position: absolute;
    width: 100%;
    height: 30%;
}
.retrobg-mountain {
    position: absolute;
    width: 30%;
    height: 100%;
    background-image: linear-gradient( #000 70%, #111 85%, #fff1 );
}
#retrobg-mountains-left { left: 0; clip-path: polygon( 0% 100%,0% 55%,5% 60%,10% 55%,20% 50%,25% 42%,30% 38%,33% 35%,40% 45%,50% 50%,60% 70%,70% 85%,75% 82%,80% 91%,85% 90%,90% 95%,95% 98%,100% 100% ); }
#retrobg-mountains-right { right: 0; clip-path: polygon( 0% 100%,5% 95%,10% 85%,15% 87%,20% 80%,25% 78%,30% 65%,40% 70%,50% 57%,60% 53%,67% 68%,70% 70%,75% 66%,80% 55%,90% 50%,95% 60%,100% 57%,100% 100% ); }

/* ............................................................... */
#retrobg-cityWrap {
    position: absolute;
    width: 50%;
    margin-left: -1%;
}
#retrobg-city {
    padding-top: 20%;
}
.retrobg-building {
    position: absolute;
    width: 5%;
    height: 100%;
    bottom: 0;
    border-radius: 4px 4px 0 0;
    background-image: linear-gradient( 0deg, rgba( 17, 17, 34, 0 ), #112 30px, #000 );
}
.retrobg-building:nth-child( odd ) {
    background-image: linear-gradient( 0deg, rgba( 24, 24, 42, 0 ), #223 30px, #000 );
}
.retrobg-antenna::after {
    content: "";
    position: absolute;
    left: 50%;
    margin-left: calc( -1px - 5% );
    bottom: 100%;
    width: 10%;
    min-width: 2px;
    height: 33%;
    background-color: #000;
}

/* ............................................................... */
#retrobg-ground {
    position: absolute;
    overflow: hidden;
    width: 100%;
    height: 45%;
    bottom: 0;
    border-top: 2px solid #bf578c;
    background-color: #000;
}
.retrobg-shutdown #retrobg-ground {
    border-color: #000;
}
#retrobg-groundShadow {
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient( #000 0%, transparent );
}

/* ............................................................... */
#retrobg-linesWrap {
    height: 100%;
    perspective: 1000px;
    perspective-origin: center top;
}
#retrobg-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    transform-origin: top center;
    animation: .35s linear infinite retrobg-lines-anim;
}
.retrobg-shutdown #retrobg-lines {
    animation-duration: 5s;
}
@keyframes retrobg-lines-anim {
    from { transform: rotateX( 84deg ) translateY( 0 ); }
    to { transform: rotateX( 84deg ) translateY( 100px ); }
}
#retrobg-hlines,
#retrobg-vlines {
    position: absolute;
    left: calc( ( 900% - 100% ) / -2 );
    width: 900%;
    height: 500%;
}
#retrobg-vlines {
    display: flex;
    justify-content: center;
}
.retrobg-hline,
.retrobg-vline {
    width: 100%;
    height: 100%;
    background-color: currentColor;
}
.retrobg-hline { height: 3px; }
.retrobg-vline { width: 3px; }
.retrobg-hline + .retrobg-hline { margin-top: 98px; }
.retrobg-vline + .retrobg-vline { margin-left: 48px; }