/* ==========================================================================
   Personal site — Barbara Demczyszak | QA Software Engineer
   ========================================================================== */

:root {
    --bg-0: #060912;
    --bg-1: #0a0e17;
    --bg-2: #111827;
    --bg-3: #1a2233;
    --border: rgba(100, 255, 218, 0.12);
    --border-strong: rgba(100, 255, 218, 0.28);
    --text: #ccd6f6;
    --text-muted: #8892b0;
    --text-dim: #5a6b8a;
    --accent: #64ffda;
    --accent-2: #7c83ff;
    --accent-3: #ff79c6;
    --warn: #ffb86c;
    --code-key: #ff79c6;
    --code-str: #f1fa8c;
    --code-bool: #bd93f9;
    --shadow: 0 18px 60px -20px rgba(2, 12, 27, 0.7);
    --radius: 12px;
    --max-w: 1100px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-0);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(circle at 20% 10%, rgba(124, 131, 255, 0.12), transparent 50%),
        radial-gradient(circle at 85% 70%, rgba(100, 255, 218, 0.10), transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(255, 121, 198, 0.05), transparent 60%);
    z-index: -2;
    pointer-events: none;
}

#matrix-bg {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.18;
    pointer-events: none;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover { color: var(--accent-2); }

::selection { background: var(--accent); color: var(--bg-0); }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-1); }
::-webkit-scrollbar-thumb { background: var(--bg-3); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ==========================================================================
   Navigation
   ========================================================================== */

.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(10, 14, 23, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.nav.scrolled { box-shadow: 0 10px 30px -10px rgba(2, 12, 27, 0.7); }
.nav.hidden { transform: translateY(-100%); }

.nav-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text);
    display: inline-flex;
    align-items: center;
    gap: 0.15rem;
    transition: transform 0.25s ease;
}

.logo:hover { transform: scale(1.04); }
.logo-bracket { color: var(--accent); }
.logo-name { color: var(--text); }

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
}

.nav-links a {
    color: var(--text-muted);
    position: relative;
    padding: 0.25rem 0;
}

.nav-links a::before {
    content: counter(nav-counter, decimal-leading-zero) '. ';
    color: var(--accent);
    font-weight: 500;
    margin-right: 0.25rem;
}

.nav-links { counter-reset: nav-counter; }
.nav-links li { counter-increment: nav-counter; }

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 0;
    width: 0; height: 2px;
    background: var(--accent);
    transition: width 0.25s ease;
}

.nav-links a:hover { color: var(--accent); }
.nav-links a:hover::after { width: 100%; }

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    margin: 5px 0;
    background: var(--accent);
    transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 7rem 1.5rem 4rem;
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-greet {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    letter-spacing: 0.5px;
}

.hero-name {
    font-size: clamp(2.4rem, 6.5vw, 4.4rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -1px;
    margin-bottom: 0.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 60%, var(--accent-3) 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-role {
    font-family: 'JetBrains Mono', monospace;
    font-size: clamp(1.1rem, 2.4vw, 1.6rem);
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

.prompt {
    color: var(--accent);
    margin-right: 0.5rem;
}

.typed {
    color: var(--text);
    font-weight: 500;
}

.cursor {
    color: var(--accent);
    font-weight: 700;
    margin-left: 2px;
    animation: blink 1s steps(2) infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 520px;
    margin-bottom: 2rem;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.85rem 1.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius);
    border: 1px solid var(--accent);
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-0);
}
.btn-primary:hover {
    background: var(--accent-2);
    border-color: var(--accent-2);
    color: var(--bg-0);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px -10px var(--accent-2);
}

.btn-ghost {
    background: transparent;
    color: var(--accent);
}
.btn-ghost:hover {
    background: rgba(100, 255, 218, 0.08);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px -10px var(--accent);
}

/* Terminal mockup */
.hero-terminal {
    background: var(--bg-1);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    transform: perspective(1200px) rotateY(-3deg) rotateX(2deg);
    transition: transform 0.4s ease;
}

.hero-terminal:hover {
    transform: perspective(1200px) rotateY(0) rotateX(0);
}

.terminal-header {
    background: var(--bg-2);
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.term-dot {
    width: 12px; height: 12px;
    border-radius: 50%;
    display: inline-block;
}
.term-red { background: #ff5f56; }
.term-yellow { background: #ffbd2e; }
.term-green { background: #27c93f; }

.term-title {
    color: var(--text-dim);
    font-size: 0.75rem;
    margin-left: auto;
}

.terminal-body {
    padding: 1.25rem 1.25rem 1.5rem;
    color: var(--text-muted);
    line-height: 1.8;
}

.term-prompt { color: var(--accent); }
.term-path { color: var(--accent-2); }

.term-code {
    color: var(--text);
    margin: 0.5rem 0;
    white-space: pre;
    overflow-x: auto;
}
.term-code .key { color: var(--code-key); }
.term-code .str { color: var(--code-str); }
.term-code .bool { color: var(--code-bool); }

.blink { animation: blink 1s steps(2) infinite; color: var(--accent); }

/* ==========================================================================
   Sections — shared
   ========================================================================== */

.section {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 5rem 1.5rem;
}

.section-head {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.section-num {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent);
    font-size: 1.2rem;
    font-weight: 500;
}

.section-title {
    font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.5px;
    white-space: nowrap;
}

.section-line {
    height: 1px;
    background: var(--border);
    flex: 1;
    max-width: 280px;
    min-width: 60px;
}

/* ==========================================================================
   About
   ========================================================================== */

.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text p {
    color: var(--text-muted);
    margin-bottom: 1.1rem;
    font-size: 1rem;
}
.about-text strong { color: var(--text); font-weight: 600; }

.about-list {
    list-style: none;
    margin-top: 0.5rem;
}
.about-list li {
    position: relative;
    padding-left: 1.6rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.92rem;
}
.about-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.about-card {
    background: linear-gradient(155deg, var(--bg-1), var(--bg-2));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    position: relative;
    box-shadow: var(--shadow);
}

.about-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--accent), transparent 40%, transparent 60%, var(--accent-2));
    z-index: -1;
    opacity: 0.4;
}

.stat {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.stat-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.stat-unit {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.4rem;
    color: var(--accent-2);
    font-weight: 600;
}

.stat-label {
    flex-basis: 100%;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 0.15rem;
}

/* ==========================================================================
   Skills
   ========================================================================== */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
}

.skill-card {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.6rem 1.4rem;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(100, 255, 218, 0.06), transparent);
    transition: left 0.6s ease;
}

.skill-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-strong);
    box-shadow: 0 18px 30px -18px rgba(100, 255, 218, 0.25);
}
.skill-card:hover::before { left: 100%; }

.skill-icon {
    width: 48px; height: 48px;
    border-radius: 10px;
    background: rgba(100, 255, 218, 0.1);
    color: var(--accent);
    display: grid;
    place-items: center;
    margin-bottom: 1rem;
}

.skill-card h3 {
    color: var(--text);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.85rem;
}

.skill-tags {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}
.skill-tags li {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    padding: 0.3rem 0.65rem;
    background: rgba(100, 255, 218, 0.06);
    color: var(--accent);
    border-radius: 999px;
    border: 1px solid var(--border);
}

/* ==========================================================================
   Timeline
   ========================================================================== */

.timeline {
    position: relative;
    padding-left: 2rem;
}
.timeline::before {
    content: '';
    position: absolute;
    top: 0; bottom: 0; left: 8px;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), var(--accent-2), transparent);
}

.timeline-item {
    position: relative;
    padding-bottom: 2rem;
}
.timeline-item:last-child { padding-bottom: 0; }

.timeline-dot {
    position: absolute;
    left: -2rem;
    top: 0.4rem;
    width: 18px; height: 18px;
    border-radius: 50%;
    background: var(--bg-0);
    border: 2px solid var(--accent);
    box-shadow: 0 0 0 4px rgba(100, 255, 218, 0.12);
}

.timeline-content {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.2rem 1.4rem;
    transition: transform 0.25s ease, border-color 0.25s ease;
}
.timeline-content:hover {
    transform: translateX(6px);
    border-color: var(--border-strong);
}

.timeline-content h3 {
    color: var(--text);
    font-size: 1.05rem;
    margin-bottom: 0.35rem;
    font-weight: 600;
}
.timeline-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ==========================================================================
   Contact
   ========================================================================== */

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

.contact-card {
    background: linear-gradient(155deg, var(--bg-1), var(--bg-2));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem;
    text-align: center;
    box-shadow: var(--shadow);
    max-width: 720px;
    margin: 0 auto;
}

.contact-card h3 {
    color: var(--text);
    font-size: clamp(1.3rem, 3vw, 1.7rem);
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.contact-card > p {
    color: var(--text-muted);
    margin-bottom: 1.75rem;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}

.contact-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 1rem 1.2rem;
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
    text-align: left;
}

.contact-link:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
    background: rgba(100, 255, 218, 0.06);
    color: var(--text);
}

.contact-link svg { color: var(--accent); flex-shrink: 0; }

.contact-text { display: flex; flex-direction: column; line-height: 1.3; }
.contact-text strong { font-weight: 600; }
.contact-text em {
    font-style: normal;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    text-align: center;
    padding: 2rem 1.5rem 2.5rem;
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
}

.footer p { margin-bottom: 0.35rem; }
.footer-sub { color: var(--text-dim); opacity: 0.7; }
.footer-heart { color: var(--accent-3); }
.footer-coffee { color: var(--warn); }

/* ==========================================================================
   Reveal-on-scroll
   ========================================================================== */

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

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

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 900px) {
    .hero {
        grid-template-columns: 1fr;
        padding-top: 6rem;
        gap: 2rem;
        min-height: auto;
    }
    .hero-terminal { transform: none; }
    .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .nav-links {
        position: fixed;
        top: 60px;
        right: 0;
        flex-direction: column;
        background: var(--bg-1);
        padding: 1.5rem 2rem;
        border-left: 1px solid var(--border);
        border-bottom: 1px solid var(--border);
        border-radius: 0 0 0 var(--radius);
        transform: translateX(120%);
        transition: transform 0.3s ease;
        gap: 1.2rem;
    }
    .nav-links.open { transform: translateX(0); }
    .nav-toggle { display: block; }

    .hero { padding: 5.5rem 1.25rem 3rem; }
    .section { padding: 3.5rem 1.25rem; }
    .contact-card { padding: 1.75rem 1.25rem; }
    .section-line { display: none; }
}