/* ─────────────────────────────────────────────────────────────
   Copywriting Mesterkurzus — Expert Flow v3-dark
   Brand: Inter + Instrument Serif + JetBrains Mono
   Cell-bordered grid · grain · lavender accent
   ───────────────────────────────────────────────────────────── */

/* Fonts loaded via build.py head template (Instrument Sans + Serif + JetBrains Mono) */

:root {
  color-scheme: dark;

  /* Map brand.css tokens → legacy site tokens */
  --bg: var(--color-background, #070709);
  --bg-elev: #111114;
  --bg-elev-2: #16161a;
  --card: #131316;
  --card-hover: #1a1a1e;

  --border: var(--color-border, rgba(223,222,218,0.08));
  --border-strong: var(--color-border-strong, rgba(223,222,218,0.14));
  --border-cell: var(--color-border-strong, rgba(223,222,218,0.14));

  --text: var(--color-foreground, #dfdeda);
  /* Kontraszt-pótlás (P2): 0.65 → 0.75, az olvashatóság miatt */
  --text-muted: rgba(223,222,218,0.78);
  --text-dim: rgba(223,222,218,0.40);

  --accent: var(--color-accent-violet, #c0c0e7);
  --accent-soft: rgba(192, 192, 231, 0.10);
  --accent-strong: #c0c0e7;
  --accent-glow: rgba(192, 192, 231, 0.18);

  /* Font tokens inherited from brand.css — do not re-declare */
  --font-serif: 'Instrument Serif', Georgia, "Times New Roman", serif;

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  --container: 1200px;
  --container-prose: 760px;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-feature-settings: 'cv11', 'ss01';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: -0.011em;
  line-height: 1.7;
}

/* Grain texture */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.045;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.92' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.6'/></svg>");
}
body > * { position: relative; z-index: 1; }

html { scroll-behavior: smooth; }

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

a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: inherit;
}

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

/* ─────────────────────────────────────────────────────────────
   Brand bar + nav
   ───────────────────────────────────────────────────────────── */
.brand-bar {
  position: fixed;
  top: 22px;
  left: 28px;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 500;
}
.brand-bar .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  animation: pulse 2.4s ease-in-out infinite;
}
.brand-bar a {
  color: var(--text-muted);
  transition: color 0.18s var(--ease-out);
}
.brand-bar a:hover { color: var(--text); }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.85); }
}

.nav-links {
  position: fixed;
  top: 22px;
  right: 28px;
  z-index: 50;
  display: flex;
  gap: 24px;
  font-size: 13px;
  color: var(--text-muted);
}
.nav-links a {
  transition: color 0.18s var(--ease-out);
}
.nav-links a:hover { color: var(--text); }

/* ─────────────────────────────────────────────────────────────
   Hero (homepage)
   ───────────────────────────────────────────────────────────── */
header.hero {
  padding: 160px 24px 100px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

header.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 50% 0%, rgba(185, 167, 224, 0.13), transparent 65%),
    radial-gradient(ellipse 40% 30% at 50% 100%, rgba(185, 167, 224, 0.04), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

header.hero::after {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 100%;
  background: linear-gradient(to bottom,
    transparent 0%,
    rgba(185, 167, 224, 0.18) 30%,
    rgba(185, 167, 224, 0.18) 70%,
    transparent 100%);
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

header.hero > * { position: relative; z-index: 1; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 28px;
  padding: 6px 14px;
  background: var(--accent-soft);
  border: 1px solid rgba(185, 167, 224, 0.22);
  border-radius: var(--radius-pill);
}
.eyebrow .pulse-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

header.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(32px, 7vw, 96px);
  font-weight: 400;
  margin: 0 0 24px;
  letter-spacing: -0.025em;
  line-height: 1.02;
  color: var(--text);
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
}
header.hero h1 em {
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}

header.hero .lede {
  font-size: 19px;
  color: var(--text-muted);
  margin: 0 auto;
  max-width: 700px;
  line-height: 1.55;
}

.stats {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 52px;
  flex-wrap: wrap;
}
.stat {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 18px 26px;
  border-radius: 14px;
  text-align: left;
  min-width: 120px;
  transition: transform 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}
.stat:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
}
.stat b {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 400;
  display: block;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 4px;
}
.stat span {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* Hero CTAs */
.hero-ctas {
  display: flex;
  gap: 14px;
  justify-content: center;
  margin-top: 48px;
  flex-wrap: wrap;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 28px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  cursor: pointer;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  transition: background 0.22s var(--ease-out), border-color 0.22s var(--ease-out), transform 0.22s var(--ease-out);
  font-family: inherit;
}

.cta-primary {
  background: var(--accent-soft);
  border-color: rgba(185, 167, 224, 0.32);
  color: var(--accent-strong);
}
.cta-primary:hover {
  background: rgba(185, 167, 224, 0.18);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.cta-secondary {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text-muted);
}
.cta-secondary:hover {
  border-color: var(--text-dim);
  color: var(--text);
  transform: translateY(-1px);
}

.cta .arrow {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 17px;
  transition: transform 0.22s var(--ease-out);
}
.cta:hover .arrow { transform: translateX(2px); }

/* ─────────────────────────────────────────────────────────────
   Container + sections
   ───────────────────────────────────────────────────────────── */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.container-prose { max-width: var(--container-prose); margin: 0 auto; padding: 0 24px; }

section { padding: 96px 0; border-bottom: 1px solid var(--border); }
section:last-of-type { border-bottom: 0; }

.section-header { text-align: center; margin-bottom: 56px; }
.section-header .eyebrow { margin-bottom: 16px; }
.section-header h2 {
  font-family: var(--font-serif);
  font-size: clamp(34px, 4.8vw, 56px);
  font-weight: 400;
  margin: 0 0 16px;
  letter-spacing: -0.022em;
  line-height: 1.1;
}
.section-header h2 em { font-style: italic; color: var(--accent); }
.section-header p {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.55;
}

/* ─────────────────────────────────────────────────────────────
   Category groups
   ───────────────────────────────────────────────────────────── */
.cat-group { margin-bottom: 48px; }
.cat-group:last-child { margin-bottom: 0; }
.cat-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 18px 0 14px;
  border-bottom: 1px solid var(--border-cell);
  margin-bottom: 0;
}
.cat-num {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 30px;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
}
.cat-title {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.6vw, 28px);
  font-weight: 400;
  margin: 0;
  letter-spacing: -0.015em;
  color: var(--text);
}
.cat-desc {
  margin-left: auto;
  font-size: 13px;
  color: var(--text-dim);
  letter-spacing: 0.02em;
  max-width: 50%;
  text-align: right;
}

/* ─────────────────────────────────────────────────────────────
   Lesson cards grid
   ───────────────────────────────────────────────────────────── */
.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 0;
  border-top: 1px solid var(--border-cell);
  border-bottom: 1px solid var(--border-cell);
}

.lesson-card {
  background: transparent;
  border-right: 1px solid var(--border-cell);
  border-bottom: 1px solid var(--border-cell);
  padding: 30px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: background 0.25s var(--ease-out);
  position: relative;
  min-height: 220px;
}
.lesson-card:hover {
  background: var(--bg-elev);
}
.lesson-card::after {
  content: "→";
  position: absolute;
  right: 24px;
  bottom: 22px;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 22px;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out);
}
.lesson-card:hover::after {
  opacity: 1;
  transform: translateX(0);
}
.lesson-card .lesson-tag {
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 500;
}
.lesson-card h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 400;
  margin: 0;
  letter-spacing: -0.018em;
  line-height: 1.18;
  color: var(--text);
}
.lesson-card h3 em { font-style: italic; color: var(--accent); }
.lesson-card p {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.55;
  margin: 0;
}
.lesson-card .lesson-meta {
  margin-top: auto;
  padding-top: 12px;
  display: flex;
  gap: 14px;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.lesson-card .lesson-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ─────────────────────────────────────────────────────────────
   Lesson page — article
   ───────────────────────────────────────────────────────────── */
.lesson-header {
  padding: 140px 24px 60px;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.lesson-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 50% 50% at 50% 0%, rgba(185, 167, 224, 0.09), transparent 60%);
  pointer-events: none;
}
.lesson-header > * { position: relative; }
.lesson-header .breadcrumb {
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 22px;
}
.lesson-header .breadcrumb a {
  color: var(--text-muted);
  transition: color 0.18s var(--ease-out);
}
.lesson-header .breadcrumb a:hover { color: var(--accent); }
.lesson-header .breadcrumb .sep {
  margin: 0 10px;
  color: var(--border-strong);
}
.lesson-header h1 {
  font-family: var(--font-serif);
  font-size: clamp(38px, 6vw, 72px);
  font-weight: 400;
  margin: 0 auto;
  letter-spacing: -0.024em;
  line-height: 1.06;
  text-align: center;
  max-width: 920px;
  color: var(--text);
}
.lesson-header h1 em { font-style: italic; color: var(--accent); }
.lesson-header .lesson-sub {
  text-align: center;
  font-size: 18px;
  color: var(--text-muted);
  max-width: 640px;
  margin: 24px auto 0;
  line-height: 1.55;
}
.lesson-header .lesson-pill-row {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 32px;
  flex-wrap: wrap;
}
.lesson-pill {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 6px 14px;
  border: 1px solid var(--border-cell);
  border-radius: var(--radius-pill);
  background: var(--card);
}
.lesson-pill.accent {
  color: var(--accent);
  border-color: rgba(185, 167, 224, 0.32);
  background: var(--accent-soft);
}

.lesson-content {
  max-width: 68ch;
  margin: 0 auto;
  padding: 64px 24px 96px;
  font-size: 17px;
  line-height: 1.7;
  color: var(--text);
}
.lesson-content > p:first-child::first-letter {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 64px;
  color: var(--accent);
  float: left;
  line-height: 0.92;
  margin-right: 10px;
  margin-top: 6px;
  margin-bottom: -6px;
}
.lesson-content p {
  margin: 0 0 1.3em;
  color: var(--text);
}
.lesson-content p strong { color: inherit; font-weight: 600; }
.lesson-content p em { color: var(--accent); font-style: italic; }
.lesson-content a {
  color: var(--accent);
  border-bottom: 1px solid rgba(185, 167, 224, 0.32);
  transition: color 0.18s, border-color 0.18s;
}
.lesson-content a:hover {
  color: var(--accent-strong);
  border-color: var(--accent);
}

.lesson-content h2 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.6vw, 40px);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 3.5rem 0 18px;
  color: var(--text);
  scroll-margin-top: 80px;
}
.lesson-content h2 em { font-style: italic; color: var(--accent); }

.lesson-content h3 {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.6vw, 28px);
  font-weight: 400;
  letter-spacing: -0.014em;
  line-height: 1.2;
  margin: 44px 0 14px;
  color: var(--accent-strong);
  scroll-margin-top: 80px;
}

.lesson-content h4 {
  font-size: 16px;
  font-weight: 600;
  margin: 30px 0 10px;
  letter-spacing: -0.008em;
  color: var(--text);
  text-transform: none;
}

.lesson-content ul, .lesson-content ol {
  margin: 0 0 1.5em;
  padding-left: 26px;
}
.lesson-content ul li, .lesson-content ol li {
  margin-bottom: 0.6em;
  color: var(--text);
}
.lesson-content ul li::marker { color: var(--accent); }
.lesson-content ol li::marker { color: var(--accent); font-family: var(--font-serif); font-style: italic; }

.lesson-content blockquote {
  margin: 28px 0;
  padding: 22px 28px;
  border-left: 3px solid var(--accent);
  background: var(--bg-elev);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-family: var(--font-serif);
  font-size: 21px;
  font-style: italic;
  line-height: 1.5;
  color: var(--text);
}

.lesson-content pre, .lesson-content code {
  font-family: var(--font-mono);
}
.lesson-content code {
  font-size: 14px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 1px 7px;
  border-radius: 5px;
  color: var(--accent-strong);
}
.lesson-content pre {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 26px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.65;
  margin: 24px 0;
  color: var(--text);
}
.lesson-content pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.lesson-content hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 56px 0;
}

.lesson-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0 32px;
  font-size: 14.5px;
}
.lesson-content th, .lesson-content td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-cell);
  vertical-align: top;
}
.lesson-content th {
  font-weight: 500;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: var(--bg-elev);
}

/* Callout boxes inside lesson */
.lesson-content .callout {
  background: rgba(185, 167, 224, 0.05);
  border: 1px solid var(--border-cell);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 20px 24px;
  margin: 28px 0;
}
.lesson-content .callout-accent {
  border-left-color: var(--accent-strong);
  border-color: rgba(185, 167, 224, 0.22);
  background: var(--accent-soft);
}

/* Bottom nav (prev/next) */
.lesson-nav {
  max-width: 68ch;
  margin: 0 auto;
  padding: 0 24px 80px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.lesson-nav a {
  background: var(--card);
  border: 1px solid var(--border-cell);
  border-radius: var(--radius);
  padding: 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: background 0.25s, border-color 0.25s, transform 0.25s;
}
.lesson-nav a:hover {
  background: var(--card-hover);
  border-color: rgba(185, 167, 224, 0.32);
  transform: translateY(-1px);
}
.lesson-nav .nav-label {
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  font-family: var(--font-mono);
}
.lesson-nav .nav-title {
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.2;
  color: var(--text);
  letter-spacing: -0.012em;
}
.lesson-nav .nav-title em { font-style: italic; color: var(--accent); }
.lesson-nav a.next { text-align: right; }

/* ─────────────────────────────────────────────────────────────
   Footer
   ───────────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 56px 24px 40px;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
}
footer .footer-brand {
  font-family: var(--font-serif);
  font-size: 22px;
  font-style: italic;
  color: var(--text);
  letter-spacing: -0.014em;
}
footer .footer-meta {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.04em;
}
footer .footer-links {
  margin-top: 24px;
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
  font-size: 13px;
}
footer .footer-links a {
  color: var(--text-muted);
  transition: color 0.18s var(--ease-out);
}
footer .footer-links a:hover { color: var(--accent); }

/* ─────────────────────────────────────────────────────────────
   Reveal animations
   ───────────────────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  will-change: opacity, transform;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 80ms; }
.reveal-delay-2 { transition-delay: 160ms; }
.reveal-delay-3 { transition-delay: 240ms; }
.reveal-delay-4 { transition-delay: 320ms; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .brand-bar .dot, .eyebrow .pulse-dot { animation: none; }
  html { scroll-behavior: auto; }
}

/* ─────────────────────────────────────────────────────────────
   Responsive
   ───────────────────────────────────────────────────────────── */
@media (max-width: 760px) {
  /* Mobil nav: ne tüntessük el — legyen kompakt scroll-bar a brand-bar alatt */
  .nav-links {
    position: fixed;
    top: 44px;
    right: 0;
    left: 0;
    padding: 6px 16px 8px;
    gap: 14px;
    font-size: 11.5px;
    letter-spacing: 0.04em;
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    background: linear-gradient(to bottom, rgba(7,7,9,0.95), rgba(7,7,9,0.6) 80%, transparent);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-links a { flex-shrink: 0; }
  .brand-bar { font-size: 10px; top: 16px; left: 18px; }
  /* Library toolbar mobilon függőlegesen jobban viselkedik */
  .library-toolbar { padding: 14px 14px; gap: 10px 12px; }
  .library-search { flex: 1 1 100%; }
  .library-filter { flex-wrap: wrap; }
  /* A beáramló nav-bar ne fedje a tartalmat: top padding +12 */
  header.hero { padding: 120px 18px 72px; }
  section { padding: 72px 0; }
  .container, .container-prose { padding: 0 18px; }
  .lesson-header { padding: 122px 18px 52px; }
  .lesson-content { padding: 48px 18px 72px; font-size: 16px; }
  .lesson-content blockquote { font-size: 18px; padding: 18px 22px; }
  .stat { padding: 14px 18px; min-width: 100px; }
  .stat b { font-size: 26px; }
  .cat-head { flex-direction: column; align-items: flex-start; gap: 6px; }
  .cat-desc { margin-left: 0; text-align: left; max-width: 100%; }
  .lesson-nav { grid-template-columns: 1fr; }
  .lesson-nav a.next { text-align: left; }
}

/* Cell-bordered grid: hide last column right-border + bottom row bottom-border (best-effort) */
.lesson-grid .lesson-card:last-child { border-right: none; }

/* ─────────────────────────────────────────────────────────────
   Library toolbar: search + level filter + count + progress
   ───────────────────────────────────────────────────────────── */
.library-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 18px;
  padding: 18px 22px;
  border: 1px solid var(--border-cell);
  border-radius: var(--radius);
  background: var(--bg-elev);
  margin: 0 0 36px;
}
.library-search {
  flex: 1 1 320px;
  min-width: 220px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--border-cell);
  border-radius: var(--radius-pill);
  background: var(--card);
  transition: border-color 0.18s var(--ease-out);
}
.library-search:focus-within {
  border-color: rgba(185, 167, 224, 0.55);
  background: var(--card-hover);
}
.library-search-icon {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 14px;
  line-height: 1;
}
.library-search input[type="search"] {
  flex: 1;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font-family: inherit;
  font-size: 14.5px;
  letter-spacing: -0.005em;
  padding: 2px 0;
}
.library-search input[type="search"]::placeholder {
  color: var(--text-dim);
}
.library-search input[type="search"]::-webkit-search-cancel-button {
  filter: invert(0.7);
  cursor: pointer;
}

.library-filter {
  display: inline-flex;
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--border-cell);
  border-radius: var(--radius-pill);
  background: var(--card);
}
.library-chip {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 12px 16px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  border: 0;
  background: transparent;
  cursor: pointer;
  transition: background 0.18s var(--ease-out), color 0.18s var(--ease-out);
}
.library-chip:hover { color: var(--text); }
.library-chip.is-active {
  background: var(--accent-soft);
  color: var(--accent);
}

.library-count,
.library-progress {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.library-progress {
  color: var(--accent);
}

.library-empty {
  margin: 24px 0 36px;
  padding: 28px 24px;
  border: 1px dashed var(--border-cell);
  border-radius: var(--radius);
  text-align: center;
  color: var(--text-muted);
  font-size: 15px;
  font-style: italic;
}

/* "Olvasva" pill a kártyán */
.lesson-card .lesson-progress {
  color: var(--accent);
  font-weight: 500;
}
.lesson-card.is-read {
  background: rgba(185, 167, 224, 0.04);
}
.lesson-card.is-read .lesson-tag::before {
  content: "✓ ";
  color: var(--accent);
}

/* ─────────────────────────────────────────────────────────────
   Lesson page: feedback CTA blokk (article alatt)
   ───────────────────────────────────────────────────────────── */
.lesson-feedback {
  max-width: 68ch;
  margin: 0 auto;
  padding: 36px 24px 12px;
  text-align: center;
}
.lesson-feedback p {
  margin: 0 0 18px;
  color: var(--text-muted);
  font-size: 15.5px;
  line-height: 1.55;
  font-family: var(--font-serif);
  font-style: italic;
}
.cta-feedback {
  border: 1px solid rgba(185, 167, 224, 0.32);
  background: var(--accent-soft);
  color: var(--accent-strong);
}
.cta-feedback:hover {
  background: rgba(185, 167, 224, 0.18);
  border-color: var(--accent);
  transform: translateY(-1px);
}

/* CTA touch-state (P2) */
.cta:active {
  transform: translateY(0);
  filter: brightness(0.95);
}

/* ─────────────────────────────────────────────────────────────
   Brand integration patches — hero-stage inside hero/lesson
   ───────────────────────────────────────────────────────────── */
header.hero .hero-stage {
  padding: 0;
  overflow: visible;
  text-align: center;
}
header.hero .hero-stage .eyebrow {
  margin-bottom: 28px;
}
.lesson-header .hero-stage {
  padding: 0;
  overflow: visible;
  text-align: center;
  max-width: 920px;
  margin: 0 auto;
}
.lesson-header .hero-stage .eyebrow {
  margin-bottom: 1rem;
}

/* font-sans fallback now uses Instrument Sans from brand.css */
html, body {
  font-family: var(--font-sans, 'Instrument Sans', system-ui, sans-serif);
}

/* ─────────────────────────────────────────────────────────────
   Round 2 — Category chip filter (Weboldal/Onepager/Landoló/Funnel)
   ───────────────────────────────────────────────────────────── */
.library-filter-cat {
  flex-wrap: wrap;
}
.library-chip-cat {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 12px 14px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  border: 0;
  background: transparent;
  cursor: pointer;
  transition: background 0.18s var(--ease-out), color 0.18s var(--ease-out);
}
.library-chip-cat:hover { color: var(--text); }
.library-chip-cat.is-active {
  background: var(--accent-soft);
  color: var(--accent);
}

@media (max-width: 480px) {
  .library-filter-cat { gap: 4px; padding: 3px; }
  .library-chip-cat { padding: 6px 10px; font-size: 10.5px; letter-spacing: 0.1em; }
  .library-chip { padding: 6px 12px; font-size: 10.5px; letter-spacing: 0.1em; }
}
@media (max-width: 360px) {
  .library-filter, .library-filter-cat { flex: 1 1 100%; justify-content: flex-start; }
  .library-chip-cat, .library-chip { font-size: 11px; padding: 6px 9px; }
}

/* ─────────────────────────────────────────────────────────────
   Round 2 — Expert Flow Ökoszisztéma footer block
   ───────────────────────────────────────────────────────────── */
.ecosystem-footer {
  border-top: 1px solid var(--border, #1f1f23);
  padding: 72px 24px 48px;
  max-width: 1120px;
  margin: 0 auto;
}
.ecosystem-eyebrow {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent, #b9a7e0);
  margin: 0 0 10px;
}
.ecosystem-footer h3 {
  font-family: var(--font-display, 'Instrument Serif', serif);
  font-style: italic;
  font-size: clamp(1.6rem, 3.5vw, 2rem);
  margin: 0 0 28px;
  color: var(--text);
  letter-spacing: -0.015em;
  font-weight: 400;
}
.ecosystem-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}
.ecosystem-grid a {
  display: block;
  padding: 14px 18px;
  border: 1px solid var(--border-cell);
  border-radius: 12px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  background: var(--card);
  transition: border-color 0.2s var(--ease-out), background 0.2s var(--ease-out), transform 0.2s var(--ease-out);
}
.ecosystem-grid a:hover {
  border-color: var(--accent);
  background: var(--card-hover);
  transform: translateY(-1px);
}

@media (max-width: 480px) {
  .ecosystem-footer { padding: 56px 18px 36px; }
}

/* ─────────────────────────────────────────────────────────────
   Round 2 — Glossary page (szotar.html)
   ───────────────────────────────────────────────────────────── */
.glossary-content {
  max-width: 760px;
}
.glossary-intro {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0 0 56px;
  padding: 0 0 36px;
  border-bottom: 1px solid var(--border-cell);
}
.glossary-term {
  padding: 0 0 32px;
  margin: 0 0 32px;
  border-bottom: 1px solid var(--border-cell);
}
.glossary-term:last-of-type {
  border-bottom: 0;
}
.glossary-term-name {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.6rem;
  font-weight: 400;
  letter-spacing: -0.015em;
  color: var(--text);
}
.glossary-term-key {
  color: var(--accent);
}
.glossary-term-en {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 4px 10px;
  border: 1px solid var(--border-cell);
  border-radius: 999px;
}
.glossary-term-def {
  font-size: 1.05rem;
  line-height: 1.65;
  margin: 0 0 14px;
  color: var(--text);
}
.glossary-term-example {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0;
  padding: 12px 16px;
  background: var(--bg-elev);
  border-left: 2px solid var(--accent);
  border-radius: 0 8px 8px 0;
}
.glossary-term-example em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-right: 8px;
}
.glossary-back {
  margin-top: 56px;
  text-align: center;
}
.glossary-back a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
}
.glossary-back a:hover { color: var(--text); }

/* ─────────────────────────────────────────────────────────────
   Round 3 — Heti feladat (lesson-homework) aside
   ───────────────────────────────────────────────────────────── */
.lesson-homework {
  border-left: 3px solid var(--accent);
  background: rgba(185, 167, 224, 0.06);
  padding: 1.25rem 1.5rem;
  margin: 2.5rem 0 1.5rem;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.lesson-homework h4 {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
}
.lesson-homework p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--text);
}
.lesson-homework ul {
  margin: 0;
  padding-left: 22px;
}
.lesson-homework ul li {
  margin-bottom: 6px;
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.55;
}
.lesson-homework ul li::marker { color: var(--accent); }

/* ─────────────────────────────────────────────────────────────
   Round 3 — Mobile breakpoint stack (320 / 360 / 375 / 414 / 480 / 768)
   ───────────────────────────────────────────────────────────── */

/* Code blocks: smooth horizontal scroll + thin scrollbar mobilon */
.lesson-content pre {
  -webkit-overflow-scrolling: touch;
}
@media (max-width: 480px) {
  .lesson-content pre {
    padding: 16px 18px 14px;
    font-size: 12.5px;
    line-height: 1.55;
    scrollbar-width: thin;
  }
  .lesson-content pre::-webkit-scrollbar {
    height: 6px;
  }
  .lesson-content pre::-webkit-scrollbar-thumb {
    background: rgba(185, 167, 224, 0.35);
    border-radius: 3px;
  }
  .lesson-content code {
    font-size: 13px;
    word-break: break-word;
  }
  .lesson-content h2 {
    margin: 2.25rem 0 14px;
  }
  .lesson-content h3 {
    margin: 28px 0 10px;
  }
  .lesson-content blockquote {
    padding: 16px 18px;
    font-size: 17px;
  }
  .lesson-homework {
    padding: 1rem 1.1rem;
    margin: 2rem 0 1.25rem;
  }
}

/* 768px — iPad portrait */
@media (max-width: 768px) {
  .lesson-content { padding-left: 20px; padding-right: 20px; }
  .stats { gap: 8px; }
  .ecosystem-grid { grid-template-columns: 1fr; }
}

/* 414px — iPhone Plus / iPhone 11 */
@media (max-width: 414px) {
  header.hero { padding: 116px 16px 64px; }
  .lesson-header { padding: 116px 16px 48px; }
  .lesson-content { padding: 40px 16px 64px; font-size: 15.5px; }
  header.hero .lede { font-size: 17px; }
  .lesson-header .lesson-sub { font-size: 16px; }
  .stat { padding: 12px 16px; min-width: 92px; }
  .stat b { font-size: 22px; }
}

/* 375px — iPhone 13 mini / iPhone SE 2 */
@media (max-width: 375px) {
  header.hero { padding: 112px 14px 60px; }
  .lesson-header { padding: 112px 14px 44px; }
  .lesson-content { padding: 36px 14px 60px; font-size: 15px; }
  .brand-bar { font-size: 10px; top: 14px; left: 14px; letter-spacing: 0.12em; }
  .nav-links { font-size: 11px; gap: 12px; }
  .lesson-pill { font-size: 10px; padding: 5px 10px; letter-spacing: 0.1em; }
  .library-toolbar { padding: 12px 12px; gap: 8px 10px; }
  .library-chip, .library-chip-cat { padding: 10px 12px; font-size: 10.5px; letter-spacing: 0.08em; min-height: 44px; }
  .library-search { padding: 8px 12px; }
  .library-search input[type="search"] { font-size: 13.5px; }
}

/* 360px — Android pre-modern */
@media (max-width: 360px) {
  .lesson-content { padding: 32px 12px 56px; font-size: 14.5px; }
  .lesson-content h2 { font-size: 24px; margin: 1.75rem 0 12px; }
  .lesson-content h3 { font-size: 19px; margin: 24px 0 8px; }
  .lesson-content blockquote { padding: 14px 16px; font-size: 16px; }
  .stat { padding: 10px 14px; min-width: 84px; }
  .stat b { font-size: 20px; }
  .lesson-nav a { padding: 14px 16px; }
  .lesson-nav .nav-title { font-size: 16px; }
}

/* 320px — iPhone SE 1, Galaxy Fold inner */
@media (max-width: 320px) {
  .brand-bar { top: 18px; left: 16px; font-size: 10px; gap: 8px; letter-spacing: 0.1em; }
  .nav-links { top: 38px; padding: 5px 12px; gap: 10px; font-size: 10.5px; }
  header.hero { padding: 108px 12px 52px; }
  .lesson-header { padding: 108px 12px 40px; }
  .lesson-content { padding: 28px 10px 48px; font-size: 14px; }
  .lesson-content p { margin-bottom: 1.1em; }
  .lesson-content pre { padding: 12px 14px 10px; font-size: 11.5px; }
  .lesson-content code { font-size: 12px; padding: 1px 5px; }
  header.hero .lede { font-size: 15.5px; }
  .lesson-header .lesson-sub { font-size: 15px; }
  .lesson-header .breadcrumb { font-size: 10.5px; }
  .stats { gap: 6px; }
  .stat { padding: 8px 12px; min-width: 76px; }
  .stat b { font-size: 18px; }
  .stat span { font-size: 9.5px; letter-spacing: 0.08em; }
  .lesson-pill { font-size: 9.5px; padding: 4px 9px; }
  .cta { font-size: 13px; padding: 10px 10px 10px 16px; }
  .lesson-homework { padding: 14px 14px; margin: 1.75rem 0 1.1rem; }
  .lesson-homework p { font-size: 14px; }
  .lesson-homework ul li { font-size: 13.5px; }
  .library-toolbar { padding: 10px 10px; }
  .library-chip, .library-chip-cat { font-size: 10px; padding: 10px 10px; letter-spacing: 0.06em; }
}

/* Touch targets — WCAG 2.5.5 baseline minden interaktív elemre */
@media (max-width: 768px) {
  .cta, .lesson-nav a, .nav-links a, .ecosystem-grid a, .footer-links a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  .lesson-nav a { display: flex; }
  .footer-links a { padding: 6px 4px; }
  .nav-links a { padding: 4px 2px; }
}

/* Breadcrumb mobil: sep kicseréljük inline-ra, hogy ne lógjon ki */
@media (max-width: 480px) {
  .lesson-header .breadcrumb { font-size: 11px; letter-spacing: 0.08em; }
  .lesson-header .breadcrumb .sep { margin: 0 6px; }
}