:root {
    --bg-color: #e6e6e6;
    --card-bg: #f4f4f4;
    --text-main: #111111;
    --text-muted: #666666;
    --accent-orange: #4da3ff;
    --grid-line: #cccccc;
    --font-display: 'Sora', sans-serif;
    --font-mono: 'Inter', sans-serif;
}

.dark-mode {
    --bg-color: #0f0f12;
    --card-bg: #1a1d22;
    --text-main: #f2f4f8;
    --text-muted: #9aa3ad;
    --grid-line: #2a2f36;
}

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

.is-hidden {
    display: none;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-mono);
    display: flex;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 1400px;
    background-color: var(--grid-line); /* Creates the border lines effect via gaps */
    border: 1px solid var(--text-main);
    display: flex;
    flex-direction: column;
    gap: 1px;
    box-shadow: 10px 10px 0px rgba(0,0,0,0.1);
}

/* HEADER */
.main-header {
    background-color: var(--card-bg);
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.logo-box {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 10px;
    border: 1px solid var(--text-main);
    padding: 5px 10px;
    background: var(--card-bg);
    color: var(--text-main);
}

.top-nav {
    display: flex;
    gap: 20px;
    align-items: center;
    font-size: 0.9rem;
}

.top-nav a {
    text-decoration: none;
    color: var(--text-main);
    text-transform: uppercase;
    font-weight: 700;
}

.btn-accent {
    background-color: var(--accent-orange);
    color: white !important;
    padding: 8px 16px;
    border: none;
    font-weight: bold;
    transition: transform 0.1s;
}

.theme-toggle {
    background: transparent;
    color: var(--text-main);
    border: 1px solid var(--text-main);
    padding: 7px 12px;
    font-weight: 700;
    text-transform: uppercase;
    font-family: var(--font-mono);
    cursor: pointer;
}

.theme-toggle:hover {
    transform: translate(-1px, -1px);
    box-shadow: 2px 2px 0 var(--text-main);
}

.btn-accent:hover {
    transform: translate(-2px, -2px);
    box-shadow: 2px 2px 0 var(--text-main);
}

/* HERO TITLE */
.hero-title {
    background-color: var(--card-bg);
    padding: 40px 20px;
    border-top: 1px solid var(--grid-line);
    text-align: center;
    background-image:
        linear-gradient(90deg, rgba(77, 163, 255, 0.12) 1px, transparent 1px),
        linear-gradient(rgba(77, 163, 255, 0.12) 1px, transparent 1px),
        radial-gradient(circle at 20% 20%, rgba(77, 163, 255, 0.15), transparent 35%),
        radial-gradient(circle at 80% 30%, rgba(77, 163, 255, 0.12), transparent 40%);
    background-size: 60px 60px, 60px 60px, 100% 100%, 100% 100%;
}

.hero-title h1 {
    font-family: var(--font-display);
    font-size: 4rem; /* Fallback */
    font-size: clamp(3rem, 8vw, 6rem);
    line-height: 0.9;
    letter-spacing: -2px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.hero-title .subtitle {
    font-family: var(--font-mono);
    letter-spacing: 2px;
    color: var(--text-muted);
}

/* HERO BANNER */
.hero-banner {
    position: relative;
    min-height: 420px;
    display: flex;
    align-items: center;
    padding: 60px 40px;
    background-image: url('images/mike_ai_server_room.jpg');
    background-size: cover;
    background-position: center;
    border-top: 1px solid var(--grid-line);
    overflow: hidden;
}

.hero-banner::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(5, 8, 12, 0.65), rgba(5, 8, 12, 0.2) 50%, rgba(5, 8, 12, 0) 80%);
    pointer-events: none;
}

.hero-banner__content {
    position: relative;
    z-index: 1;
    max-width: 520px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.hero-banner__title {
    font-family: var(--font-mono);
    font-size: clamp(2.6rem, 6vw, 4.8rem);
    letter-spacing: 2px;
    text-transform: none;
    font-weight: 700;
}

.hero-banner__subtitle {
    font-family: var(--font-mono);
    font-size: clamp(0.9rem, 2vw, 1.2rem);
    letter-spacing: 4px;
    text-transform: uppercase;
    font-weight: 700;
}

.wall-text {
    color: #e5f3ff;
    text-shadow: 0 0 12px rgba(77, 163, 255, 0.45), 0 0 30px rgba(77, 163, 255, 0.2);
    animation: wall-projection 6s ease-in-out infinite;
    filter: blur(0.2px);
}

.hero-banner .wall-text {
    animation: none;
}

.hero-banner__note {
    position: absolute;
    top: 20px;
    left: 24px;
    z-index: 1;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: #9fd7ff;
    text-transform: none;
    text-shadow: 0 0 10px rgba(77, 163, 255, 0.35);
}

@keyframes wall-projection {
    0%, 100% {
        opacity: 0.75;
        transform: translateX(0) skewX(-1deg);
        text-shadow: 0 0 10px rgba(77, 163, 255, 0.35), 0 0 24px rgba(77, 163, 255, 0.2);
    }
    50% {
        opacity: 1;
        transform: translateX(6px) skewX(-2deg);
        text-shadow: 0 0 16px rgba(77, 163, 255, 0.55), 0 0 40px rgba(77, 163, 255, 0.25);
    }
}

/* MAIN GRID */
.grid-layout {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px; /* Shows background color as borders */
    background-color: var(--grid-line);
}

.grid-item {
    background-color: var(--card-bg);
    padding: 20px;
    position: relative;
    display: flex;
    flex-direction: column;
}

.item-header {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.item-header h2,
.item-header h3,
.item-header span {
    font-size: inherit;
    font-weight: inherit;
    margin: 0;
    color: var(--text-main);
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--text-main);
    display: inline-block;
}

/* Specific Items */
.objective-section {
    grid-column: span 3;
    color: var(--text-main);
}

.contact-section {
    grid-column: span 1;
}

.stats-bar {
    grid-column: span 4;
    padding: 30px 20px;
    background: var(--card-bg);
    overflow: hidden;
}

.dynamic-banner {
    width: 100%;
    overflow: hidden;
    border-top: 1px solid var(--grid-line);
    border-bottom: 1px solid var(--grid-line);
    padding: 10px 0;
}

.banner-track {
    display: inline-flex;
    gap: 40px;
    align-items: center;
    white-space: nowrap;
    animation: banner-scroll 18s linear infinite;
}

.banner-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 220px;
    text-transform: uppercase;
    text-align: center;
}

.banner-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.banner-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 2px;
}

@keyframes banner-scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

@media (prefers-reduced-motion: reduce) {
    .banner-track {
        animation: none;
    }
    .wall-text {
        animation: none;
    }
}

.section-divider {
    grid-column: span 4;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background: var(--grid-line);
}

.filter-tabs button {
    background: none;
    border: none;
    border: 1px solid transparent;
    padding: 5px 10px;
    margin-right: 5px;
    font-family: var(--font-mono);
    cursor: pointer;
    font-size: 0.8rem;
}

.filter-tabs button.active {
    background: var(--text-main);
    color: white;
}

/* Cards */
.experience-card {
    grid-column: span 1;
    transition: background 0.2s;
    border-right: 1px solid transparent;
}

.experience-card .card-body {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.experience-card:hover {
    background: #eaeaea;
}

.card-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    margin-bottom: 20px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--grid-line);
    padding-bottom: 10px;
}

.category {
    background: var(--grid-line);
    padding: 2px 6px;
    color: var(--text-main);
}

.card-body h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    text-transform: uppercase;
    min-height: 2.4rem;
    color: var(--text-main);
}

.card-body p {
    color: var(--text-main);
}

.card-body .description {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.4;
    flex-grow: 1;
    margin-bottom: 20px;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-top: auto;
}

.metric {
    display: flex;
    flex-direction: column;
}

.metric .val { font-weight: bold; font-size: 1.1rem; color: var(--text-main); }
.metric .lbl { font-size: 0.6rem; color: var(--text-muted); }

.arrow-btn {
    background: transparent;
    border: 1px solid var(--text-main);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--text-main);
    padding: 0;
    line-height: 0;
}

.arrow-btn:hover {
    background: var(--text-main);
    color: white;
}

/* List Cards */
.list-card {
    grid-column: span 2;
}

.large-card {
    grid-column: span 2;
}

.styled-list {
    list-style: none;
}

.styled-list li {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid var(--grid-line);
    padding: 10px 0;
}

.styled-list li:last-child {
    border-bottom: none;
}

.list-content strong {
    display: block;
    font-size: 0.9rem;
    color: var(--text-main);
}

.sub {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.highlight-text {
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-main);
}

.highlight-text--compact {
    margin-top: 14px;
    margin-bottom: 6px;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.simple-list {
    list-style: square;
    padding-left: 20px;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-main);
}

.simple-list li {
    color: var(--text-main);
}

.competitions-divider {
    justify-content: flex-start;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    background: var(--card-bg);
}

.talk-item {
    display: flex;
    gap: 15px;
    margin-bottom: 10px;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--grid-line);
    padding-bottom: 5px;
}

.talk-item .date {
    font-weight: bold;
    color: var(--accent-orange);
    min-width: 40px;
}

.talk-item p {
    color: var(--text-main);
    margin: 0;
}

.talk-item a {
    color: var(--text-main);
    text-decoration: none;
    transition: color 0.2s, text-decoration 0.2s;
}

.talk-item a:hover {
    color: var(--accent-orange);
    text-decoration: underline;
}

/* Visual showcase specifics */
.visual-showcase .card-body {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.visual-showcase .talk-item {
    flex-direction: column;
    gap: 8px;
    border-bottom: none;
    padding-bottom: 0;
}

.visual-showcase img,
.visual-showcase video {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border: 1px solid var(--grid-line);
    background: var(--card-bg);
}

/* Dark mode overrides */
.dark-mode .experience-card:hover {
    background: #1f2329;
}

.dark-mode .section-divider {
    background: #1a1d22;
}

.dark-mode .competitions-divider {
    background: var(--card-bg);
}

.dark-mode .category {
    background: #1f2329;
    color: var(--text-main);
}

.dark-mode .card-header,
.dark-mode .styled-list li,
.dark-mode .talk-item {
    border-bottom: 1px solid #2f343b;
}

.dark-mode .tag {
    background: #1f2329;
}

.dark-mode .dynamic-banner {
    border-top: 1px solid #2f343b;
    border-bottom: 1px solid #2f343b;
}

.dark-mode .visual-showcase img,
.dark-mode .visual-showcase video {
    border-color: #2f343b;
    background: #1a1d22;
}

.dark-mode .filter-tabs button.active {
    background: var(--accent-orange);
    color: #0b0f14;
}

.dark-mode .btn-accent {
    color: #0b0f14 !important;
}

@media (max-width: 1024px) {
    .visual-showcase .card-body {
        grid-template-columns: 1fr;
    }
}

/* Skills */
.skills-section {
    grid-column: span 4;
    background: var(--card-bg);
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.skill-box {
    border: 1px solid var(--grid-line);
    padding: 10px 20px;
    background: var(--card-bg);
    font-size: 0.9rem;
}

.skill-box .check {
    color: var(--accent-orange);
    font-weight: bold;
    margin-right: 5px;
}

/* Footer */
footer {
    background-color: var(--card-bg);
    padding: 20px;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    border-top: 1px solid var(--grid-line);
}

/* Objective Specifics */
.lead-text {
    font-size: 1.1rem;
    margin-bottom: 15px;
    line-height: 1.5;
    color: var(--text-main);
}

.item-content p {
    color: var(--text-main);
}

.tags {
    margin-top: 20px;
    display: flex;
    gap: 10px;
}

.tag {
    background: var(--grid-line);
    padding: 5px 10px;
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-main);
}

/* Contact specifics */
.contact-section a {
    color: var(--text-main);
}

.info-row {
    margin-bottom: 15px;
}

.info-row .label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 2px;
}

.email-text {
    word-break: break-all;
    font-size: 0.9rem;
    color: var(--text-main);
}

.info-row .value {
    font-size: 0.9rem;
    color: var(--text-main);
}

/* RESPONSIVE */
@media (max-width: 1024px) {
    .grid-layout {
        grid-template-columns: repeat(2, 1fr);
    }
    .objective-section, .contact-section, .stats-bar, .section-divider, .skills-section {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .grid-layout {
        display: flex;
        flex-direction: column;
    }
    
    .hero-title h1 {
        font-size: 3rem;
    }

    .main-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 15px;
        gap: 12px;
    }

    .top-nav {
        flex-wrap: nowrap;
        justify-content: flex-end;
        width: auto;
        gap: 0;
        margin-top: 0;
    }

    .top-nav a:not(.btn-accent), .theme-toggle {
        display: none;
    }

    .btn-accent {
        font-size: 0.75rem;
        padding: 8px 12px;
        margin-top: 0;
        flex: none;
    }

    .hero-banner {
        min-height: 320px;
        padding: 40px 20px;
        align-items: center;
        justify-content: flex-start;
        background-position: right center; /* Keep face visible on right */
    }

    .hero-banner__content {
        align-items: flex-start;
        text-align: left;
        max-width: 70%; /* Prevent overlapping the face on the right */
    }

    .hero-banner__note {
        top: 16px;
        left: 18px;
        font-size: 0.75rem;
        letter-spacing: 1px;
    }

    .section-divider {
        justify-content: center;
        padding: 15px;
    }

    .filter-tabs {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
    }

    .filter-tabs button {
        margin: 0;
        flex: 1 1 auto;
    }
}