/* ═══════════════════════════════════════════════════
   TURING.PL — "Neural Lab" Design System
   Dark-first, sophisticated AI education platform
   ═══════════════════════════════════════════════════ */

/* ── Tokens ── */
:root {
    --font-body: 'DM Sans', sans-serif;
    --font-display: 'Instrument Serif', Georgia, serif;
    --font-mono: 'JetBrains Mono', monospace;
    --max-width: 1200px;
    --narrow-width: 860px;
    --content-width: 720px;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-glow: 0 0 40px -12px;
}

[data-theme="dark"] {
    --bg-deep: #050508;
    --bg: #0a0a12;
    --bg-surface: #0f0f1a;
    --bg-card: #12121f;
    --bg-card-hover: #1a1a2e;
    --bg-elevated: #1e1e32;
    --text: #c8c8d8;
    --text-bright: #eeeef6;
    --text-muted: #8888a4;
    --text-dim: #5a5a74;
    --accent: #7c6ff7;
    --accent-bright: #a78bfa;
    --accent-dim: #5b4fc7;
    --accent-glow: rgba(124, 111, 247, 0.15);
    --accent2: #06b6d4;
    --accent2-dim: rgba(6, 182, 212, 0.12);
    --border: #1c1c30;
    --border-bright: #2a2a45;
    --success: #34d399;
    --error: #f87171;
    --warning: #fbbf24;
    --code-bg: #0d0d18;
    --gradient-hero: linear-gradient(165deg, #0a0a12 0%, #12102a 40%, #0a1628 70%, #0a0a12 100%);
    --gradient-card: linear-gradient(145deg, rgba(124,111,247,0.04) 0%, rgba(6,182,212,0.02) 100%);
    --gradient-accent: linear-gradient(135deg, #7c6ff7 0%, #06b6d4 100%);
    --noise: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
}

[data-theme="light"] {
    --bg-deep: #f5f5fa;
    --bg: #fafafe;
    --bg-surface: #f0f0f8;
    --bg-card: #ffffff;
    --bg-card-hover: #f5f5ff;
    --bg-elevated: #e8e8f4;
    --text: #2a2a3e;
    --text-bright: #111128;
    --text-muted: #5a5a78;
    --text-dim: #7a7a96;
    --accent: #5b4fc7;
    --accent-bright: #7c6ff7;
    --accent-dim: #4338ca;
    --accent-glow: rgba(91, 79, 199, 0.08);
    --accent2: #0891b2;
    --accent2-dim: rgba(8, 145, 178, 0.06);
    --border: #e0e0ee;
    --border-bright: #d0d0e0;
    --success: #059669;
    --error: #dc2626;
    --warning: #d97706;
    --code-bg: #f0f0f8;
    --gradient-hero: linear-gradient(165deg, #fafafe 0%, #ededff 40%, #e8f4f8 70%, #fafafe 100%);
    --gradient-card: linear-gradient(145deg, rgba(91,79,199,0.03) 0%, rgba(8,145,178,0.02) 100%);
    --gradient-accent: linear-gradient(135deg, #5b4fc7 0%, #0891b2 100%);
    --noise: none;
}

/* ── Icons ── */
.icon {
    display: inline-block;
    vertical-align: -0.125em;
    flex-shrink: 0;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
    font-family: var(--font-body);
    background: var(--bg-deep);
    color: var(--text);
    line-height: 1.72;
    font-size: 15.5px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: var(--noise);
    pointer-events: none;
    z-index: 9999;
}

main { flex: 1; }
a { color: var(--accent-bright); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }

::selection { background: var(--accent); color: #fff; }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-dim); }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 2rem; }
.container-narrow { max-width: var(--narrow-width); }

/* ═══ HEADER ═══ */
.site-header {
    background: rgba(10, 10, 18, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background var(--transition);
}

[data-theme="light"] .site-header {
    background: rgba(250, 250, 254, 0.85);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.logo { display: flex; align-items: baseline; gap: 0.6rem; text-decoration: none; }
.logo-text {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 400;
    color: var(--text-bright);
    letter-spacing: -0.02em;
}
.logo-dot { color: var(--accent-bright); }
.logo-tagline {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-dim);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.main-nav ul { list-style: none; display: flex; gap: 0.25rem; }
.main-nav a {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.88rem;
    padding: 0.45rem 0.85rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.main-nav a:hover { color: var(--text-bright); background: var(--accent-glow); }
.main-nav a.active { color: var(--accent-bright); background: var(--accent-glow); }

.header-actions { display: flex; align-items: center; gap: 0.5rem; }

.theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.45rem 0.55rem;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 1rem;
    transition: all var(--transition);
    line-height: 1;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent-bright); }

[data-theme="dark"] .icon-sun { display: inline; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: inline; }

.mobile-menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.mobile-menu-toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; transition: var(--transition); border-radius: 1px; }

/* ═══ HERO ═══ */
.hero {
    padding: 7rem 2rem 5rem;
    text-align: center;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 800px;
    height: 800px;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(to top, var(--bg-deep), transparent);
    pointer-events: none;
}

.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.6rem, 6vw, 4.2rem);
    color: var(--text-bright);
    margin-bottom: 1.2rem;
    font-weight: 400;
    letter-spacing: -0.03em;
    line-height: 1.15;
    position: relative;
}

.accent {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 520px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
    position: relative;
}

.hero-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
}

/* ═══ BUTTONS ═══ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.72rem 1.6rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.9rem;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all var(--transition);
    border: 1.5px solid transparent;
    text-decoration: none;
    letter-spacing: 0.01em;
}

.btn-primary {
    background: var(--gradient-accent);
    color: #fff;
    box-shadow: var(--shadow-glow) var(--accent-dim);
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 50px -8px var(--accent-dim);
    color: #fff;
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text);
    border-color: var(--border-bright);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent-bright); }

.btn-outline {
    background: transparent;
    color: var(--accent-bright);
    border-color: var(--accent-dim);
}
.btn-outline:hover {
    background: var(--accent-glow);
    border-color: var(--accent-bright);
    color: var(--accent-bright);
}

.btn-sm { padding: 0.4rem 0.85rem; font-size: 0.8rem; border-radius: var(--radius-sm); }

/* ═══ SECTIONS ═══ */
.section { padding: 5rem 2rem; }
.section-alt { background: var(--bg-surface); }

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    color: var(--text-bright);
    margin-bottom: 0.4rem;
    letter-spacing: -0.02em;
    font-weight: 400;
}
.section-title .icon {
    vertical-align: -0.1em;
    margin-right: 0.15em;
}

.section-desc {
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 560px;
    font-size: 1.02rem;
}

.section-cta { margin-top: 2.5rem; text-align: center; }

/* ═══ CARDS ═══ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.25rem;
}
.card-grid-3 { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card-grid-4 { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }

.card {
    background: var(--gradient-card);
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: all var(--transition);
    text-decoration: none;
    color: var(--text);
    display: block;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition);
}

.card:hover {
    border-color: var(--accent-dim);
    background-color: var(--bg-card-hover);
    color: var(--text);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow) var(--accent-glow);
}

.card:hover::before { opacity: 1; }

.card h3 {
    color: var(--text-bright);
    margin-bottom: 0.5rem;
    font-size: 1.08rem;
    font-weight: 600;
    line-height: 1.4;
}

.card p { color: var(--text-muted); font-size: 0.88rem; line-height: 1.6; }

.card-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 500;
    background: var(--accent-glow);
    color: var(--accent-bright);
    padding: 0.2rem 0.55rem;
    border-radius: 6px;
    margin-bottom: 0.65rem;
    letter-spacing: 0.02em;
    border: 1px solid rgba(124, 111, 247, 0.15);
}

.card-meta {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-dim);
    margin-top: 0.75rem;
    display: block;
}

.tool-rating {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--warning);
    font-size: 0.85rem;
}

.tool-rating-large {
    font-family: var(--font-mono);
    font-size: 2.4rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 1rem 0;
}

/* ═══ PILLAR CARD ═══ */
.pillar-card {
    display: block;
    padding: 2rem 2.5rem;
    background: var(--gradient-card);
    background-color: var(--bg-card);
    border: 1px solid var(--accent-dim);
    border-left: 4px solid var(--accent);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text);
    transition: all var(--transition);
    margin-bottom: 2.5rem;
    position: relative;
    overflow: hidden;
}
.pillar-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--gradient-accent);
}
.pillar-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow) var(--accent-glow);
    color: var(--text);
}
.pillar-card-content h2 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    color: var(--text-bright);
    margin-bottom: 0.75rem;
    font-weight: 400;
    letter-spacing: -0.01em;
}
.pillar-card-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}
.pillar-card-label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent-bright);
    margin-bottom: 0.75rem;
    font-weight: 600;
}
.pillar-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-dim);
}
.pillar-card-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--accent-bright);
    font-weight: 600;
}
.pillar-card:hover .pillar-card-cta { text-decoration: underline; }

.cluster-heading {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
    margin-bottom: 1rem;
    font-weight: 600;
}

/* ═══ ARTICLE LIST ═══ */
.article-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
@media (max-width: 768px) { .article-list { grid-template-columns: 1fr; } }

.article-card {
    display: flex;
    flex-direction: column;
    padding: 1.5rem 1.75rem;
    background: var(--gradient-card);
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.article-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition);
}

.article-card:hover {
    border-color: var(--accent-dim);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow) var(--accent-glow);
    color: var(--text);
}
.article-card:hover::before { opacity: 1; }

.article-card--pillar {
    border-left: 3px solid var(--accent);
    background: var(--gradient-card);
    background-color: var(--bg-card);
}

.article-card h3 { color: var(--text-bright); margin-bottom: 0.3rem; font-size: 1.05rem; }
.article-card p { color: var(--text-muted); font-size: 0.88rem; }

/* ═══ ARTICLE WITH TOC ═══ */
.article-with-toc {
    display: grid;
    grid-template-columns: 1fr 200px;
    gap: 3rem;
    align-items: start;
    max-width: 1100px;
    margin: 0 auto;
}
.article-main { min-width: 0; }

.toc-sidebar {
    position: sticky;
    top: 80px;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
}
.toc-sidebar::-webkit-scrollbar { width: 3px; }
.toc-sidebar::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 3px; }

.sidebar-section { margin-bottom: 2rem; }
.sidebar-heading {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
    margin-bottom: 0.6rem;
    font-weight: 600;
}
.sidebar-nav { display: flex; flex-direction: column; gap: 0.1rem; }
.sidebar-link {
    display: block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 4px;
    line-height: 1.35;
    border-left: 2px solid transparent;
    transition: all var(--transition);
}
.sidebar-link:hover { color: var(--text-bright); border-left-color: var(--accent-dim); }
.sidebar-link--active {
    color: var(--accent-bright);
    border-left-color: var(--accent);
    font-weight: 600;
}
.sidebar-link--h3 { padding-left: 1rem; font-size: 0.72rem; }

@media (max-width: 900px) {
    .article-with-toc { grid-template-columns: 1fr; }
    .toc-sidebar { display: none; }
}

/* ═══ ARTICLE CONTENT ═══ */
.article-content { max-width: var(--narrow-width); margin: 0 auto; padding-left: 2rem; padding-right: 2rem; }

.article-header { margin-bottom: 2.5rem; }
.article-header h1 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    line-height: 1.2;
    letter-spacing: -0.02em;
    font-weight: 400;
    color: var(--text-bright);
}

.article-meta {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-top: 1rem;
    flex-wrap: wrap;
    font-family: var(--font-mono);
    font-size: 0.78rem;
}
.article-meta a { color: var(--accent-bright); }

.article-lead {
    font-size: 1.08rem;
    color: var(--text);
    border-left: 3px solid var(--accent);
    padding: 0.75rem 1.25rem;
    margin-bottom: 2.5rem;
    background: var(--accent-glow);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    line-height: 1.75;
}

.article-body h2 {
    font-family: var(--font-display);
    font-size: 1.55rem;
    color: var(--text-bright);
    margin: 3rem 0 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    letter-spacing: -0.01em;
    font-weight: 400;
    scroll-margin-top: 90px;
}
.article-body h3 {
    scroll-margin-top: 90px;
}

.article-body h2:first-child { border-top: none; padding-top: 0; margin-top: 0; }

.article-body h3 {
    font-size: 1.15rem;
    color: var(--text-bright);
    margin: 2rem 0 0.6rem;
    font-weight: 600;
}

.article-body p { margin-bottom: 1.1rem; }
.article-body ul, .article-body ol { margin: 1rem 0; padding-left: 1.5rem; }
.article-body li { margin-bottom: 0.5rem; }

.article-body code {
    font-family: var(--font-mono);
    background: var(--code-bg);
    padding: 0.15rem 0.45rem;
    border-radius: 5px;
    font-size: 0.88em;
    border: 1px solid var(--border);
}

.article-body pre {
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    overflow-x: auto;
    margin: 1.5rem 0;
}
.article-body pre code { background: none; padding: 0; border: none; font-size: 0.85rem; }

.article-body blockquote {
    border-left: 3px solid var(--accent);
    padding: 0.5rem 1.25rem;
    color: var(--text-muted);
    margin: 1.5rem 0;
    background: var(--accent-glow);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9rem;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
}

.article-body th {
    background: var(--bg-elevated);
    font-weight: 600;
    color: var(--text-bright);
    text-align: left;
    padding: 0.75rem 1rem;
    font-size: 0.82rem;
    font-family: var(--font-mono);
    letter-spacing: 0.02em;
    border-bottom: 2px solid var(--border-bright);
}

.article-body td {
    padding: 0.65rem 1rem;
    border-bottom: 1px solid var(--border);
}

.article-body tr:last-child td { border-bottom: none; }
.article-body tr:hover td { background: var(--accent-glow); }

.article-body strong { color: var(--text-bright); }

.article-body figure { margin: 2rem 0; text-align: center; }
.article-body figcaption { font-size: 0.82rem; color: var(--text-dim); margin-top: 0.5rem; font-style: italic; }

.article-body a { border-bottom: 1px solid var(--accent-dim); }
.article-body a:hover { border-bottom-color: var(--accent-bright); }

/* ═══ WIDGET ═══ */
.ai-widget {
    margin: 2.5rem 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    min-height: 200px;
    background: var(--bg-surface);
    overflow: auto;
    position: relative;
    /* Widget CSS vars — mapped to theme */
    --color-bg: var(--bg-surface);
    --color-bg-card: var(--bg-card);
    --color-text: var(--text);
    --color-text-muted: var(--text-muted);
    --color-border: var(--border);
    --color-primary: var(--accent);
}

.ai-widget::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-accent);
    opacity: 0.5;
}

.ai-widget--full { min-height: 420px; }

.widget-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 0.82rem;
}

/* ═══ FAQ ═══ */
.faq-section {
    margin-top: 3.5rem;
    padding-top: 2.5rem;
    border-top: 1px solid var(--border);
}

.faq-section h2 {
    font-family: var(--font-display);
    border-top: none !important;
    padding-top: 0 !important;
    margin-top: 0 !important;
}

/* ═══ ABOUT PAGE ═══ */
.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}
@media (max-width: 768px) { .about-features { grid-template-columns: 1fr; } }

.about-feature {
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-align: center;
}
.about-feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--accent-glow);
    color: var(--accent-bright);
    margin-bottom: 1rem;
}
.about-feature h3 { font-size: 1.05rem; margin-bottom: 0.5rem; color: var(--text-bright); }
.about-feature p { font-size: 0.88rem; color: var(--text-muted); margin: 0; line-height: 1.6; }

.about-contact {
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-top: 1rem;
}
.about-contact > p { color: var(--text-muted); margin-bottom: 1.25rem; }
.about-contact-methods { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 1rem; }
.about-contact-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    background: var(--accent-glow);
    border: 1px solid rgba(124, 111, 247, 0.2);
    border-radius: var(--radius);
    font-family: var(--font-mono);
    font-size: 0.88rem;
    color: var(--accent-bright);
    text-decoration: none;
    transition: all var(--transition);
}
.about-contact-item:hover { background: rgba(124, 111, 247, 0.15); border-color: var(--accent); }
.about-contact-note { font-size: 0.8rem; color: var(--text-dim); margin: 0; }

.faq-item {
    margin-bottom: 1.75rem;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.faq-item h3 {
    font-size: 1rem;
    color: var(--text-bright);
    margin-bottom: 0.4rem;
    font-weight: 600;
}

.faq-item p { color: var(--text-muted); font-size: 0.92rem; margin: 0; }

/* ═══ RELATED ═══ */
.related-section { margin-top: 2.5rem; }
.related-section h2 { font-family: var(--font-display); }
.related-list { list-style: none; }
.related-list li {
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--border);
}
.related-list a { font-weight: 500; }

/* ═══ BREADCRUMBS ═══ */
.breadcrumbs {
    padding: 1rem 2rem 0;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dim);
}
/* Sekcja po breadcrumbs — mniejszy top padding */
.breadcrumbs + .section { padding-top: 2rem; }

.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 0.25rem; }
.breadcrumbs li:not(:last-child)::after { content: '›'; margin-left: 0.35rem; color: var(--text-dim); }
.breadcrumbs a { color: var(--text-dim); }
.breadcrumbs a:hover { color: var(--accent-bright); }

/* ═══ BADGES ═══ */
.badge {
    display: inline-block;
    padding: 0.25rem 0.7rem;
    border-radius: 6px;
    font-size: 0.78rem;
    font-family: var(--font-mono);
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-muted);
    text-decoration: none;
    transition: all var(--transition);
}
.badge:hover { border-color: var(--accent); color: var(--accent-bright); background: var(--accent-glow); }
.tool-categories { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 2.5rem; }

/* ═══ PROS / CONS ═══ */
.pros-cons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin: 2.5rem 0;
}

.pros, .cons {
    padding: 1.25rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.pros { background: rgba(52, 211, 153, 0.04); border-color: rgba(52, 211, 153, 0.15); }
.cons { background: rgba(248, 113, 113, 0.04); border-color: rgba(248, 113, 113, 0.15); }
.pros h3 { color: var(--success); font-size: 0.95rem; margin-bottom: 0.75rem; }
.cons h3 { color: var(--error); font-size: 0.95rem; margin-bottom: 0.75rem; }
.pros ul, .cons ul { list-style: none; }
.pros li, .cons li { padding: 0.3rem 0; font-size: 0.9rem; }
.pros li::before { content: '+ '; color: var(--success); font-weight: 700; font-family: var(--font-mono); }
.cons li::before { content: '- '; color: var(--error); font-weight: 700; font-family: var(--font-mono); }

/* ═══ TOOL CTA ═══ */
.tool-cta { margin: 2.5rem 0; text-align: center; }

/* ═══ SEARCH ═══ */
.search-form { display: flex; gap: 0.5rem; margin-bottom: 2rem; }

.search-input {
    flex: 1;
    padding: 0.75rem 1.15rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-card);
    color: var(--text);
    font-size: 1rem;
    font-family: var(--font-body);
    transition: border-color var(--transition);
}

.search-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.search-count { color: var(--text-dim); margin-bottom: 1rem; font-family: var(--font-mono); font-size: 0.85rem; }

/* ═══ PAGINATION ═══ */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}
.pagination-info {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-dim);
}

/* ═══ AUTHOR ═══ */
.author-profile { margin-bottom: 2.5rem; }
.author-card {
    padding: 1.25rem 0;
    border-top: 1px solid var(--border);
    margin-top: 2.5rem;
    display: flex;
    gap: 1rem;
    align-items: center;
}
.author-links { display: flex; gap: 1rem; margin-top: 0.75rem; }
.author-links a {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    padding: 0.3rem 0.6rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
}

/* ═══ PLAYGROUND HOME SECTION ═══ */
.playground-home .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}
.playground-home-content { display: flex; flex-direction: column; gap: 1.25rem; }
.playground-home-desc { color: var(--text-muted); line-height: 1.7; font-size: 1.02rem; }
.playground-home-stats {
    display: flex;
    gap: 2rem;
}
.playground-stat {
    display: flex;
    flex-direction: column;
}
.playground-stat strong {
    font-family: var(--font-mono);
    font-size: 1.6rem;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.playground-stat span { font-size: 0.78rem; color: var(--text-dim); font-family: var(--font-mono); letter-spacing: 0.02em; }
.playground-home-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}
.playground-home-grid .preview-item {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

/* ═══ PLAYGROUND ═══ */
.playground-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.playground-sidebar {
    border-right: 1px solid var(--border);
    padding-right: 1.5rem;
}

.widget-group { margin-bottom: 1.75rem; }

.widget-group h3 {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 0.6rem;
    letter-spacing: 0.1em;
    font-weight: 600;
}

.widget-group ul { list-style: none; }
.widget-group li { margin-bottom: 0.15rem; }

.widget-group a {
    color: var(--text-muted);
    font-size: 0.88rem;
    display: block;
    padding: 0.38rem 0.65rem;
    border-radius: 6px;
    transition: all var(--transition);
}

.widget-group a:hover { background: var(--accent-glow); color: var(--text-bright); }
.widget-group a.active { background: var(--accent-glow); color: var(--accent-bright); font-weight: 600; }

.playground-desc { color: var(--text-muted); line-height: 1.7; margin-bottom: 1rem; max-width: 640px; }
.playground-article-link { margin-bottom: 1.5rem; }
.playground-learn-more {
    margin-top: 2rem;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-align: center;
}
.playground-learn-more h3 { font-family: var(--font-display); font-size: 1.15rem; color: var(--text-bright); margin-bottom: 0.5rem; font-weight: 400; }
.playground-learn-more p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1rem; }
.playground-learn-more a { font-weight: 600; }

.playground-intro {
    margin-bottom: 1.5rem;
    padding: 1rem 1.25rem;
    background: var(--accent-glow);
    border-left: 3px solid var(--accent);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    line-height: 1.7;
}
.playground-intro p { color: var(--text); margin: 0; }

.playground-learn {
    margin-bottom: 1.5rem;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.playground-learn h3 {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent-bright);
    margin-bottom: 0.75rem;
    font-weight: 600;
}
.playground-learn ul { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.playground-learn li {
    font-size: 0.88rem;
    color: var(--text-muted);
    padding-left: 1.2rem;
    position: relative;
}
.playground-learn li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 600;
}

.playground-how {
    margin-bottom: 1.5rem;
}
.playground-how h3 {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    margin-bottom: 0.4rem;
    font-weight: 600;
}
.playground-how p { color: var(--text-muted); font-size: 0.9rem; }

.playground-welcome {
    padding: 3rem 0;
    color: var(--text-dim);
}
.playground-welcome h2 { font-family: var(--font-display); color: var(--text-bright); margin-bottom: 0.5rem; }
.playground-welcome > p { color: var(--text-muted); margin-bottom: 2rem; max-width: 500px; }
.playground-welcome-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
    text-align: left;
}
.playground-welcome-grid .card { padding: 1.25rem; }
.playground-welcome-grid .card h3 { font-size: 0.95rem; }
.playground-welcome-grid .card p { font-size: 0.8rem; }

@media (max-width: 768px) {
    .playground-learn ul { grid-template-columns: 1fr; }
    .playground-welcome-grid { grid-template-columns: 1fr; }
}

/* ═══ FOOTER ═══ */
.site-footer {
    background: var(--bg);
    border-top: 1px solid var(--border);
    padding: 4rem 2rem 2rem;
    margin-top: 5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand .logo-text { font-family: var(--font-display); }
.footer-brand p { color: var(--text-dim); font-size: 0.88rem; margin-top: 0.75rem; line-height: 1.6; }

.footer-links h4 {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-dim);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 0.45rem; }
.footer-links a { color: var(--text-muted); font-size: 0.88rem; }
.footer-links a:hover { color: var(--accent-bright); }

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 1.5rem;
    text-align: center;
    color: var(--text-dim);
    font-size: 0.82rem;
    font-family: var(--font-mono);
}

/* ═══ ALERTS ═══ */
.alert {
    padding: 0.85rem 1.15rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}
.alert-success { background: rgba(52,211,153,0.08); border: 1px solid rgba(52,211,153,0.2); color: var(--success); }
.alert-error { background: rgba(248,113,113,0.08); border: 1px solid rgba(248,113,113,0.2); color: var(--error); }

/* ═══ VISUAL POLISH ═══ */

/* Hero pills */
.hero-features {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
    position: relative;
}
.hero-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 1rem;
    background: rgba(124, 111, 247, 0.08);
    border: 1px solid rgba(124, 111, 247, 0.2);
    border-radius: 100px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

/* Playground preview */
.playground-preview {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
    margin: 1.5rem 0;
}
.preview-item {
    padding: 0.6rem 1.2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: all var(--transition);
}
.preview-item:hover {
    border-color: var(--accent);
    color: var(--accent-bright);
}

/* Article type badge */
.type-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.72rem;
    color: var(--text-dim);
    font-family: var(--font-mono);
    margin-bottom: 0.35rem;
}

/* Pricing badge */
.pricing-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.3rem 0.7rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    margin-bottom: 0.5rem;
}
.pricing-free { background: rgba(52,211,153,0.1); color: var(--success); border: 1px solid rgba(52,211,153,0.2); }
.pricing-freemium { background: var(--accent-glow); color: var(--accent-bright); border: 1px solid rgba(124,111,247,0.2); }
.pricing-paid { background: rgba(251,191,36,0.1); color: var(--warning); border: 1px solid rgba(251,191,36,0.2); }

/* Footer divider */
.footer-divider {
    text-align: center;
    margin-bottom: 2.5rem;
    position: relative;
}
.footer-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--border-bright) 30%, var(--border-bright) 70%, transparent 100%);
}
.footer-divider span {
    position: relative;
    display: inline-block;
    padding: 0 1.5rem;
    background: var(--bg-deep);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dim);
    letter-spacing: 0.04em;
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: var(--bg-surface);
        border-bottom: 1px solid var(--border);
        padding: 1rem;
    }
    .main-nav.open { display: block; }
    .main-nav ul { flex-direction: column; gap: 0.25rem; }
    .mobile-menu-toggle { display: block; }
    .footer-grid { grid-template-columns: 1fr; }
    .hero { padding: 4rem 1.5rem 3rem; }
    .section { padding: 3rem 1.5rem; }
    .container { padding: 0 1.25rem; }
    .playground-layout { grid-template-columns: 1fr; }
    .playground-sidebar { border-right: none; border-bottom: 1px solid var(--border); padding-right: 0; padding-bottom: 1rem; }
    .pros-cons { grid-template-columns: 1fr; }
    .card-grid { grid-template-columns: 1fr; }
    .breadcrumbs { padding: 0.75rem 1.25rem; }
    .hero-features { gap: 0.5rem; }
    .hero-pill { font-size: 0.68rem; padding: 0.35rem 0.75rem; }
    .playground-preview { gap: 0.5rem; }
    .preview-item { font-size: 0.78rem; padding: 0.45rem 0.9rem; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 2rem; }
    .article-header h1 { font-size: 1.6rem; }
    .search-form { flex-direction: column; }
}