/* ============================================
   JULIUS BALL — PORTFOLIO
   Modern Brutalist Design
   ============================================ */

/* --- VARIABLES --- */
:root {
    --bg-primary: #0c0c0c;
    --bg-secondary: #141414;
    --bg-card: #1a1a1a;
    --bg-card-hover: #222222;
    --text-primary: #f0f0f0;
    --text-secondary: #888888;
    --text-muted: #555555;
    --accent: #c8ff00;
    --accent-dim: rgba(200, 255, 0, 0.08);
    --accent-glow: rgba(200, 255, 0, 0.15);
    --border: #2a2a2a;
    --border-hover: #3a3a3a;
    --font-main: 'Space Grotesk', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
    --nav-height: 70px;
}

/* --- RESET & BASE --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    scrollbar-width: thin;
    scrollbar-color: var(--accent) var(--bg-primary);
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

ul {
    list-style: none;
}

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

/* --- GRAIN OVERLAY --- */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
}

/* --- CURSOR GLOW --- */
.cursor-glow {
    position: fixed;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(200, 255, 0, 0.04) 0%, transparent 70%);
    pointer-events: none;
    z-index: 9998;
    transform: translate(-50%, -50%);
    transition: left 0.15s ease-out, top 0.15s ease-out;
    display: none;
}

.cursor-glow.active {
    display: block;
}

/* --- NAVIGATION --- */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0 3rem;
    height: var(--nav-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(12, 12, 12, 0.8);
    border-bottom: 1px solid var(--border);
}

.nav-logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    z-index: 101;
}

.nav-logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--accent);
}

.nav-links-cv {
    display: none;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.status-dot {
    width: 6px;
    height: 6px;
    background: #4ade80;
    border-radius: 50%;
    animation: pulse 2s infinite;
    flex-shrink: 0;
}

.nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 28px;
    height: 28px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 101;
    padding: 0;
}

.nav-hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s;
}

body.menu-open .nav-hamburger span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

body.menu-open .nav-hamburger span:nth-child(2) {
    opacity: 0;
}

body.menu-open .nav-hamburger span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(12, 12, 12, 0.95);
    backdrop-filter: blur(10px);
    z-index: 99;
}

body.menu-open .mobile-menu-overlay {
    display: block;
}

/* --- SIDE ELEMENTS --- */
.side-email {
    position: fixed;
    right: 2rem;
    bottom: 0;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.15em;
    transition: color 0.3s;
}

.side-email::after {
    content: '';
    display: block;
    width: 1px;
    height: 80px;
    background: var(--text-muted);
    margin: 1rem auto 0;
}

.side-email:hover {
    color: var(--accent);
}

.side-social {
    position: fixed;
    left: 2rem;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
}

.side-social a {
    color: var(--text-muted);
    font-size: 1.1rem;
    transition: all 0.3s;
}

.side-social a:hover {
    color: var(--accent);
    transform: translateY(-3px);
}

.side-social::after {
    content: '';
    display: block;
    width: 1px;
    height: 80px;
    background: var(--text-muted);
    margin-top: 0.5rem;
}

/* --- HERO --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 0 3rem;
    padding-left: 6rem;
    position: relative;
}

.hero-content {
    max-width: 900px;
}

.hero-label {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
    letter-spacing: 0.1em;
}

.hero h1 {
    font-size: clamp(2.5rem, 7vw, 5.5rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.04em;
    margin-bottom: 1.5rem;
}

.hero h1 .outline {
    -webkit-text-stroke: 1.5px var(--text-secondary);
    color: transparent;
}

.hero-bio {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: 3rem;
    left: 6rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 40px;
    height: 1px;
    background: var(--text-muted);
    animation: scrollPulse 2s infinite;
}

/* --- BUTTONS --- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    background: var(--accent);
    color: var(--bg-primary);
    font-family: var(--font-main);
    font-weight: 600;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary:hover {
    box-shadow: 0 0 30px var(--accent-glow);
    transform: translateY(-2px);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    background: transparent;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-weight: 500;
    font-size: 0.9rem;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.3s;
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.8rem;
}

/* --- SECTIONS --- */
section {
    padding: 7rem 3rem;
    padding-left: 6rem;
    padding-right: 6rem;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 3.5rem;
}

.section-number {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.section-line {
    flex: 1;
    max-width: 300px;
    height: 1px;
    background: var(--border);
}

/* --- MARQUEE --- */
.marquee-strip {
    overflow: hidden;
    white-space: nowrap;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
}

.marquee-inner {
    display: inline-flex;
    gap: 3rem;
    animation: marquee 25s linear infinite;
}

.marquee-inner span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.marquee-inner span.dot {
    color: var(--accent);
}

.marquee-strip:hover .marquee-inner {
    animation-play-state: paused;
}

/* --- ABOUT --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.8;
}

.about-text .accent {
    color: var(--accent);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin-top: 2rem;
}

.tech-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 0.8rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.tech-item:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-dim);
}

.accent-icon {
    color: var(--accent);
    font-size: 0.6rem;
}

.about-image {
    position: relative;
    aspect-ratio: 1;
    max-width: 350px;
    justify-self: center;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%) contrast(1.1);
    transition: filter 0.5s;
}

.about-image:hover img {
    filter: grayscale(0%);
}

.about-image::after {
    content: '';
    position: absolute;
    inset: 12px -12px -12px 12px;
    border: 2px solid var(--accent);
    z-index: -1;
    transition: all 0.3s;
}

.about-image:hover::after {
    inset: 8px -8px -8px 8px;
}

/* --- EXPERIENCE --- */
.experience-tabs {
    display: flex;
    gap: 3rem;
}

.tab-list {
    display: flex;
    flex-direction: column;
    min-width: 200px;
    border-left: 2px solid var(--border);
    flex-shrink: 0;
}

.tab-btn {
    padding: 0.75rem 1.25rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    text-align: left;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.tab-btn::before {
    content: '';
    position: absolute;
    left: -2px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: transparent;
    transition: background 0.3s;
}

.tab-btn:hover {
    color: var(--accent);
    background: var(--accent-dim);
}

.tab-btn.active {
    color: var(--accent);
    background: var(--accent-dim);
}

.tab-btn.active::before {
    background: var(--accent);
}

.tab-panels {
    flex: 1;
    min-width: 0;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

.tab-panel h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.tab-panel h3 span {
    color: var(--accent);
    font-weight: 500;
}

.tab-panel .date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.tab-panel ul {
    margin-bottom: 1.25rem;
}

.tab-panel li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.tab-panel li::before {
    content: '\25B9';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.exp-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 1rem;
}

.exp-tech span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    padding: 0.2rem 0.5rem;
    border: 1px solid var(--border);
}

.position-divider {
    height: 1px;
    background: var(--border);
    margin: 1.5rem 0;
}

/* --- PROJECTS --- */
.projects-grid {
    display: grid;
    gap: 2.5rem;
}

.project-card {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    background: var(--bg-card);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: all 0.4s;
}

.project-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.project-card--reversed {
    grid-template-columns: 1fr 1.2fr;
}

.project-card--reversed .project-info {
    order: 2;
    text-align: right;
}

.project-card--reversed .project-image {
    order: 1;
}

.project-card--reversed .project-tech {
    justify-content: flex-end;
}

.project-card--reversed .project-links {
    justify-content: flex-end;
}

.project-info {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.project-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent);
    margin-bottom: 0.75rem;
}

.project-name {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.project-tech span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 0.3rem 0.6rem;
    border: 1px solid var(--border);
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-links a {
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: color 0.3s;
}

.project-links a:hover {
    color: var(--accent);
}

.project-image {
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    position: relative;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.project-card:hover .project-image img {
    transform: scale(1.03);
}

.project-image-placeholder {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    padding: 2rem;
    border: 1px dashed var(--border);
}

/* --- ACHIEVEMENTS --- */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.achievement-card {
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.achievement-card:hover {
    border-color: var(--accent);
    background: var(--accent-dim);
}

.achievement-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-dim);
    color: var(--accent);
    margin-bottom: 1.25rem;
    font-size: 1.1rem;
}

.achievement-card h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.achievement-card .meta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    margin-bottom: 0.75rem;
}

.achievement-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.achievement-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 1rem;
}

.achievement-tech span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    padding: 0.2rem 0.5rem;
    border: 1px solid var(--border);
}

/* --- CONTACT --- */
.contact-section {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    padding: 10rem 2rem;
}

.contact-section h2 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.contact-section p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 2.5rem;
}

/* --- FOOTER --- */
footer {
    padding: 2rem 3rem;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
}

footer a {
    color: var(--text-secondary);
    transition: color 0.3s;
}

footer a:hover {
    color: var(--accent);
}

/* --- 404 --- */
.error-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
}

.error-label {
    font-family: var(--font-mono);
    font-size: clamp(6rem, 15vw, 12rem);
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 1rem;
}

.error-page h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.error-text {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* --- SCROLL REVEAL --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* --- ACTIVE NAV --- */
.nav-links a.active {
    color: var(--accent);
}

/* --- ANIMATIONS --- */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@keyframes scrollPulse {
    0%, 100% { width: 40px; }
    50% { width: 60px; }
}

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

/* --- RESPONSIVE: TABLET (< 1024px) --- */
@media (max-width: 1024px) {
    nav {
        padding: 0 2rem;
    }

    .hero {
        padding-left: 3rem;
    }

    .hero-scroll {
        left: 3rem;
    }

    section {
        padding: 5rem 2.5rem;
    }

    .about-grid {
        gap: 3rem;
    }

    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .project-card,
    .project-card--reversed {
        grid-template-columns: 1fr;
    }

    .project-card--reversed .project-info {
        order: 0;
        text-align: left;
    }

    .project-card--reversed .project-image {
        order: 0;
    }

    .project-card--reversed .project-tech {
        justify-content: flex-start;
    }

    .project-card--reversed .project-links {
        justify-content: flex-start;
    }

    .project-image {
        min-height: 250px;
    }
}

/* --- RESPONSIVE: MOBILE (< 768px) --- */
@media (max-width: 768px) {
    :root {
        --nav-height: 60px;
    }

    nav {
        padding: 0 1.5rem;
    }

    .nav-links {
        position: fixed;
        inset: 0;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        background: rgba(12, 12, 12, 0.98);
        backdrop-filter: blur(20px);
        z-index: 100;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s;
    }

    body.menu-open .nav-links {
        opacity: 1;
        pointer-events: all;
    }

    .nav-links a {
        font-size: 1.2rem;
    }

    .nav-links-cv {
        display: list-item;
    }

    .nav-hamburger {
        display: flex;
    }

    .nav-status {
        display: none;
    }

    .side-social,
    .side-email {
        display: none;
    }

    .hero {
        padding: calc(var(--nav-height) + 3rem) 1.5rem 3rem;
        min-height: calc(100vh - 60px);
    }

    .hero h1 {
        font-size: clamp(2rem, 10vw, 3.5rem);
    }

    .hero-bio {
        font-size: 1rem;
    }

    .hero-scroll {
        left: 1.5rem;
        bottom: 2rem;
    }

    section {
        padding: 4rem 1.5rem;
    }

    .section-header {
        margin-bottom: 2.5rem;
    }

    .section-title {
        font-size: 1.4rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .about-image {
        max-width: 250px;
        justify-self: center;
    }

    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .experience-tabs {
        flex-direction: column;
        gap: 1.5rem;
    }

    .tab-list {
        flex-direction: row;
        border-left: none;
        border-bottom: 2px solid var(--border);
        min-width: 0;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .tab-btn {
        white-space: nowrap;
        padding: 0.6rem 1rem;
        font-size: 0.8rem;
    }

    .tab-btn::before {
        left: 0;
        right: 0;
        top: auto;
        bottom: -2px;
        width: auto;
        height: 2px;
    }

    .project-card,
    .project-card--reversed {
        grid-template-columns: 1fr;
    }

    .project-card--reversed .project-info {
        order: 0;
        text-align: left;
    }

    .project-card--reversed .project-tech {
        justify-content: flex-start;
    }

    .project-card--reversed .project-links {
        justify-content: flex-start;
    }

    .project-info {
        padding: 1.5rem;
    }

    .project-name {
        font-size: 1.4rem;
    }

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

    .contact-section {
        padding: 6rem 1.5rem;
    }

    .contact-section h2 {
        font-size: 2rem;
    }

    footer {
        padding: 1.5rem;
    }
}

/* --- REDUCED MOTION --- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }

    .cursor-glow {
        display: none !important;
    }
}