/* ============================================================
   CHECKLYN — LANDING PAGE STYLES
   Extracted from the inline landing-page styles.
   ============================================================ */

/* ============================================================
     LANDING PAGE — SECTION LAYOUT
     ============================================================ */

  .shell { max-width: 1200px; margin: 0 auto; padding: 0 32px; }
  @media (max-width: 720px) { .shell { padding: 0 20px; } }

  /* ============================================================
     STICKY HEADER
     ============================================================ */
  .site-header {
    position: sticky; top: 0; z-index: 50;
    background: color-mix(in oklch, var(--bg-page) 88%, transparent);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--rule-soft);
  }
  .site-header-inner {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 0;
  }
  .nav-links {
    display: flex; gap: 28px; align-items: center;
    font-size: var(--fs-sm); color: var(--ink-muted);
  }
  .nav-links a { letter-spacing: var(--tracking-snug); }
  .nav-links a:hover { color: var(--ink-strong); text-decoration: none; }
  .nav-cta { display: flex; gap: 10px; align-items: center; }
  .theme-toggle {
    border: 1px solid var(--rule);
    background: var(--bg-raised);
    color: var(--ink-muted);
    padding: 6px 9px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    display: inline-flex; align-items: center; gap: 6px;
  }
  .theme-toggle:hover { color: var(--ink-strong); }
  @media (max-width: 820px) {
    .nav-links { display: none; }
  }

  /* ============================================================
     HERO
     ============================================================ */
  .hero {
    padding: 72px 0 96px;
    border-bottom: 1px solid var(--rule-soft);
  }
  .hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 72px;
    align-items: start;
  }
  @media (max-width: 980px) {
    .hero { padding: 32px 0 56px; }
    .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  }
  @media (max-width: 720px) {
    .hero { padding: 24px 0 48px; }
    .eyebrow { margin-bottom: 16px; }
    .hero-lede { margin-bottom: 24px; font-size: var(--fs-md); }
  }

  .eyebrow {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--accent);
    display: inline-flex; align-items: center; gap: 8px;
    margin-bottom: 24px;
  }
  .eyebrow .dot { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; display: inline-block; }
  .eyebrow .sep { color: var(--ink-faint); }

  h1.hero-title {
    font-size: var(--fs-display);
    line-height: 0.96;
    letter-spacing: -0.035em;
    margin: 0 0 20px;
    max-width: 14ch;
  }
  @media (max-width: 720px) {
    h1.hero-title { max-width: 18ch; }
  }
  h1.hero-title em {
    font-style: normal;
    color: var(--accent);
    font-weight: 600;
  }
  .hero-lede {
    font-size: var(--fs-lg);
    color: var(--ink-muted);
    line-height: 1.5;
    max-width: 52ch;
    margin: 0 0 32px;
  }

  /* Hero form */
  .hero-form {
    display: flex; gap: 10px;
    max-width: 440px;
    margin-bottom: 14px;
  }
  .hero-form input[type="email"] {
    flex: 1; padding: 13px 14px;
  }
  @media (max-width: 480px) {
    .hero-form { flex-direction: column; gap: 8px; }
    .hero-form button { width: 100%; padding: 14px 16px; }
  }

  /* GDPR consent row */
  .consent-row {
    display: flex; align-items: flex-start; gap: 10px;
    max-width: 440px;
    margin: 0 0 14px;
    font-size: var(--fs-xs);
    color: var(--ink-muted);
    line-height: 1.5;
    cursor: pointer;
  }
  .consent-row input[type="checkbox"] {
    margin-top: 3px;
    flex-shrink: 0;
    cursor: pointer;
    accent-color: var(--accent);
  }
  .consent-row a { color: var(--ink-strong); text-decoration: underline; text-decoration-color: var(--rule); }
  .consent-row a:hover { text-decoration-color: var(--accent); }
  .final-cta .consent-row { margin-left: auto; margin-right: auto; }

  /* Honeypot — hidden from humans, visible to bots */
  .hp-field {
    position: absolute;
    left: -9999px;
    width: 1px; height: 1px;
    opacity: 0;
    pointer-events: none;
  }
  .hero-microcopy {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--ink-faint);
    letter-spacing: var(--tracking-snug);
    text-transform: uppercase;
    line-height: 1.6;
  }
  .hero-microcopy b { color: var(--ink-muted); font-weight: 500; }

  .counter {
    display: inline-flex; align-items: center; gap: 10px;
    margin-top: 28px;
    padding: 8px 12px 8px 10px;
    border: 1px solid var(--rule-soft);
    border-radius: var(--radius-sm);
    background: var(--bg-surface);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--ink-muted);
    letter-spacing: var(--tracking-snug);
    flex-wrap: wrap;
  }
  .counter b { color: var(--ink-strong); font-weight: 500; }
  .counter .live-dot {
    width: 7px; height: 7px; border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 0 3px color-mix(in oklch, var(--success) 25%, transparent);
    animation: pulse 1.8s ease-in-out infinite;
  }

  /* ============================================================
     BROWSER FRAME — wraps real product screenshots
     ============================================================ */
  .browser {
    background: var(--bg-raised);
    border: 1px solid var(--rule);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 24px 60px -28px rgba(26,22,18,0.32), 0 2px 4px rgba(26,22,18,0.04);
    position: relative;
  }
  .browser-chrome {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--rule-soft);
    background: color-mix(in oklch, var(--bg-page) 60%, var(--bg-surface));
  }
  .browser-dots { display: flex; gap: 6px; }
  .browser-dots span {
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--bg-sunken);
    border: 1px solid var(--rule-soft);
  }
  .browser-url {
    flex: 1;
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--ink-faint);
    letter-spacing: var(--tracking-snug);
    text-align: center;
    padding: 4px 12px;
    background: var(--bg-surface);
    border: 1px solid var(--rule-soft);
    border-radius: var(--radius-xs);
    max-width: 360px;
    margin: 0 auto;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .browser-meta {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--ink-faint);
    letter-spacing: var(--tracking-snug);
    text-transform: uppercase;
  }
  .browser-screen {
    position: relative;
    overflow: hidden;
    background: var(--bg-page);
  }
  .browser-screen img {
    display: block;
    width: 100%;
    height: auto;
  }

  /* Stacked screenshots for blur reveal toggle */
  .screen-toggle {
    cursor: pointer;
    --screen-cta-y: 74%;
  }
  .screen-toggle .screen-on {
    position: absolute; inset: 0;
    opacity: 0;
    transition: opacity .25s ease;
  }
  .screen-toggle.is-revealed .screen-on { opacity: 1; }
  .screen-cta {
    position: absolute;
    left: 50%;
    top: var(--screen-cta-y);
    bottom: auto;
    transform: translate(-50%, -50%);
    background: var(--accent);
    color: #fff;
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    padding: 9px 16px;
    border-radius: var(--radius-sm);
    border: 0;
    cursor: pointer;
    box-shadow: 0 8px 22px -8px rgba(196,98,58,0.55), 0 0 0 4px rgba(255,255,255,0.6);
    transition: opacity .2s ease, transform .2s ease;
    z-index: 2;
    white-space: nowrap;
  }
  .screen-cta:hover { background: var(--accent-strong); }
  .screen-toggle.is-revealed .screen-cta {
    opacity: 0; pointer-events: none;
  }
  /* Hero browser — let the full screenshot show; column width controls scale */
  .hero-demo .browser-screen img.full {
    height: auto;
  }

  /* Used by the old synthesized demo card (kept for reference structure) */
  .demo-frame {
    background: var(--bg-surface);
    border: 1px solid var(--rule-soft);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-hover);
    position: relative;
  }

  .hero-demo-caption {
    margin-top: 16px;
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--ink-faint);
    letter-spacing: var(--tracking-snug);
    text-transform: uppercase;
    text-align: center;
    display: inline-flex; align-items: center; gap: 10px;
    width: 100%; justify-content: center;
  }

  /* ============================================================
     DEMO SECTION — paired screenshot + callouts
     ============================================================ */
  .demo-pair {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
  @media (max-width: 980px) {
    .demo-pair { grid-template-columns: 1fr; gap: 40px; }
  }
  .demo-pair .browser { position: sticky; top: 96px; }
  @media (max-width: 980px) { .demo-pair .browser { position: static; } }

  /* ============================================================
     PRACTICE ANYWHERE — desktop + mobile screens
     ============================================================ */
  .devices {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    gap: 48px;
    align-items: end;
  }
  @media (max-width: 820px) {
    .devices { grid-template-columns: 1fr; gap: 40px; }
  }
  .device-desktop .browser-screen { background: var(--bg-page); }
  .device-mobile {
    position: relative;
    margin-bottom: 24px;
  }
  .device-mobile .phone {
    border: 8px solid #1A1612;
    border-radius: 36px;
    overflow: hidden;
    box-shadow: 0 24px 60px -24px rgba(26,22,18,0.45);
    background: #F5F1E8; /* matches screenshot bg so corner-clip is invisible */
    max-width: 280px;
    margin: 0 auto;
    position: relative;
    padding: 18px 0;
  }
  .device-mobile .phone img { display: block; width: 100%; height: auto; }
  .device-caption {
    margin-top: 14px;
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--ink-faint);
    letter-spacing: var(--tracking-snug);
    text-transform: uppercase;
    text-align: center;
  }
  .demo-frame-head {
    display: flex; justify-content: space-between; align-items: center;
    padding: 10px 14px;
    border-bottom: 1px solid var(--rule-soft);
    background: color-mix(in oklch, var(--bg-surface) 80%, var(--bg-sunken));
  }
  .demo-frame-head .filename {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--ink-muted);
    letter-spacing: var(--tracking-snug);
  }
  .demo-frame-head .filename .dim { color: var(--ink-faint); }

  /* The photo */
  .demo-photo {
    position: relative;
    height: 220px;
    background:
      linear-gradient(135deg, #c4763f 0%, #6e3115 100%);
    overflow: hidden;
  }
  .demo-photo::after {
    /* subtle striped placeholder accent */
    content: ""; position: absolute; inset: 0;
    background:
      repeating-linear-gradient(115deg, transparent 0 10px, rgba(255,255,255,0.04) 10px 11px),
      radial-gradient(120% 80% at 20% 20%, rgba(255,255,255,0.18), transparent 50%);
  }
  .demo-photo-meta {
    position: absolute; left: 14px; bottom: 12px;
    display: flex; gap: 6px; align-items: center;
    font-family: var(--font-mono); font-size: var(--fs-micro);
    color: rgba(255,255,255,0.92);
    text-transform: uppercase; letter-spacing: var(--tracking-wide);
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
  }
  .demo-photo-meta .lang-tag {
    background: rgba(255,255,255,0.12);
    border-color: rgba(255,255,255,0.25);
    color: #fff;
  }

  /* Level switcher inside demo */
  .level-switch {
    display: flex; gap: 0;
    padding: 12px 14px;
    border-bottom: 1px solid var(--rule-soft);
    background: var(--bg-surface);
    align-items: center;
  }
  .level-switch-label {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--ink-faint);
    margin-right: 12px;
  }
  .level-switch .seg {
    display: flex;
    border: 1px solid var(--rule);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--bg-raised);
  }
  .level-switch .seg button {
    background: transparent;
    border: 0;
    border-right: 1px solid var(--rule-soft);
    padding: 6px 12px;
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    letter-spacing: var(--tracking-wide);
    color: var(--ink-muted);
    cursor: pointer;
    text-transform: uppercase;
  }
  .level-switch .seg button:last-child { border-right: 0; }
  .level-switch .seg button.active {
    background: var(--accent);
    color: #fff;
  }
  .level-switch .seg button:hover:not(.active) {
    background: var(--bg-sunken);
    color: var(--ink-strong);
  }
  .level-switch .lesson-of {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--ink-faint);
    letter-spacing: var(--tracking-snug);
    text-transform: uppercase;
  }

  /* Passage */
  .passage { padding: 18px 14px; }
  .passage + .passage { border-top: 1px solid var(--rule-faint); }
  .passage-head {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 10px;
  }
  .passage-title {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--ink-faint);
    display: inline-flex; align-items: center; gap: 8px;
  }
  .passage-title .mark {
    color: var(--accent);
    font-family: var(--font-mono);
  }
  .passage-body {
    display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
    align-items: start;
  }
  .passage-side { position: relative; }
  .passage-side .lang-tag { margin-bottom: 6px; display: inline-block; }
  .passage-text {
    margin: 4px 0 0;
    font-size: var(--fs-sm);
    line-height: 1.55;
    color: var(--ink);
  }
  .passage-side.is-hidden .passage-text {
    filter: blur(6px);
    user-select: none;
    transition: filter .2s ease;
  }
  .passage-side.is-hidden:hover .passage-text { filter: blur(3px); }
  .passage-reveal {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid var(--rule);
    background: var(--bg-raised);
    color: var(--ink-strong);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    letter-spacing: var(--tracking-snug);
    cursor: pointer;
    white-space: nowrap;
    box-shadow: var(--shadow-card);
  }
  .passage-reveal:hover { background: var(--bg-sunken); }
  .passage-side:not(.is-hidden) .passage-reveal { display: none; }

  .audio-row {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 14px;
    border-top: 1px solid var(--rule-faint);
    background: var(--bg-surface);
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--ink-faint);
    letter-spacing: var(--tracking-snug);
  }
  .audio-play {
    width: 28px; height: 28px;
    border-radius: 50%;
    border: 1px solid var(--rule);
    background: var(--bg-raised);
    color: var(--ink-strong);
    cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 10px;
    padding: 0 0 0 2px;
  }
  .audio-play:hover { background: var(--accent-tint); color: var(--accent-strong); }
  .audio-play.playing { background: var(--accent); color: #fff; border-color: var(--accent); }

  /* Vocabulary preview strip */
  .vocab-strip {
    padding: 12px 14px;
    border-top: 1px solid var(--rule-faint);
    background: var(--bg-page);
    display: flex; flex-wrap: wrap; gap: 6px;
    align-items: center;
  }
  .vocab-strip .label {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--ink-faint);
    margin-right: 6px;
  }
  .vocab-chip {
    font-size: var(--fs-xs);
    padding: 3px 9px 3px 7px;
    background: var(--bg-raised);
    border: 1px solid var(--rule-soft);
    border-radius: var(--radius-sm);
    color: var(--ink-strong);
    display: inline-flex; align-items: center; gap: 6px;
  }
  .vocab-chip .level-badge { width: 14px; height: 14px; font-size: 9px; }

  /* Floating annotation pointers */
  .annotation {
    position: absolute;
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    letter-spacing: var(--tracking-snug);
    text-transform: uppercase;
    color: var(--ink-muted);
    background: var(--bg-raised);
    border: 1px solid var(--rule-soft);
    padding: 4px 8px;
    border-radius: var(--radius-xs);
    box-shadow: var(--shadow-card);
    pointer-events: none;
    white-space: nowrap;
  }
  .annotation .num {
    color: var(--accent);
    margin-right: 6px;
    font-weight: 500;
  }

  /* ============================================================
     SECTIONS
     ============================================================ */
  section.lp {
    padding: 96px 0;
    border-bottom: 1px solid var(--rule-soft);
  }
  @media (max-width: 720px) { section.lp { padding: 64px 0; } }

  .section-eyebrow {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--ink-faint);
    display: inline-flex; align-items: center; gap: 10px;
    margin-bottom: 20px;
  }
  .section-eyebrow .num { color: var(--accent); }

  h2.section-h {
    font-size: var(--fs-h1);
    letter-spacing: -0.025em;
    line-height: 1.05;
    max-width: 18ch;
    margin: 0 0 16px;
  }
  .section-sub {
    font-size: var(--fs-lg);
    color: var(--ink-muted);
    max-width: 56ch;
    margin: 0 0 56px;
    line-height: 1.5;
  }

  /* ============================================================
     HOW IT WORKS — 3 step strip
     ============================================================ */
  .steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border-top: 1px solid var(--rule-soft);
    border-bottom: 1px solid var(--rule-soft);
  }
  @media (max-width: 820px) { .steps { grid-template-columns: 1fr; } }

  .step {
    padding: 36px 36px;
    border-right: 1px solid var(--rule-soft);
    position: relative;
  }
  .step:first-child { padding-left: 0; }
  .step:last-child { border-right: 0; padding-right: 0; }
  @media (max-width: 820px) {
    .step { border-right: 0; border-bottom: 1px solid var(--rule-soft); padding: 28px 0; }
    .step:last-child { border-bottom: 0; }
  }
  .step-num {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    letter-spacing: var(--tracking-wide);
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 20px;
    display: flex; align-items: center; gap: 12px;
  }
  .step-num .glyph {
    width: 36px; height: 36px;
    border: 1px solid var(--rule);
    border-radius: var(--radius-sm);
    display: inline-flex; align-items: center; justify-content: center;
    color: var(--ink-strong);
    font-size: 16px;
    background: var(--bg-surface);
  }
  .step h3 {
    font-size: 22px;
    margin: 0 0 8px;
    letter-spacing: -0.015em;
  }
  .step p {
    margin: 0;
    color: var(--ink-muted);
    font-size: var(--fs-md);
    line-height: 1.55;
    max-width: 32ch;
  }

  /* ============================================================
     DEMO SECTION — Annotated lesson
     ============================================================ */
  .demo-section { background: var(--bg-surface); }
  .demo-callouts {
    margin-top: 64px;
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 48px;
  }
  @media (max-width: 980px) { .demo-callouts { grid-template-columns: 1fr; } }

  .callout-list {
    list-style: none; margin: 0; padding: 0;
    display: grid; gap: 0;
    border-top: 1px solid var(--rule-soft);
  }
  .callout-list li {
    padding: 18px 0;
    border-bottom: 1px solid var(--rule-faint);
    display: grid;
    grid-template-columns: 36px 1fr;
    gap: 16px;
    align-items: baseline;
  }
  .callout-list .num {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--accent);
    letter-spacing: var(--tracking-wide);
  }
  .callout-list h4 {
    font-size: var(--fs-md);
    font-weight: 500;
    margin: 0 0 4px;
    color: var(--ink-strong);
    letter-spacing: -0.005em;
  }
  .callout-list p {
    margin: 0;
    color: var(--ink-muted);
    font-size: var(--fs-sm);
    line-height: 1.55;
  }

  .demo-caption {
    margin-top: 24px;
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--ink-faint);
    letter-spacing: var(--tracking-snug);
    text-transform: uppercase;
    text-align: center;
  }

  /* ============================================================
     WHY IT'S DIFFERENT — 4 cards
     ============================================================ */
  .benefit-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    border-top: 1px solid var(--rule-soft);
    border-left: 1px solid var(--rule-soft);
  }
  @media (max-width: 820px) { .benefit-grid { grid-template-columns: 1fr; } }
  .benefit {
    padding: 40px;
    border-right: 1px solid var(--rule-soft);
    border-bottom: 1px solid var(--rule-soft);
    background: var(--bg-surface);
  }
  .benefit-num {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--accent);
    letter-spacing: var(--tracking-wide);
    margin-bottom: 16px;
    display: flex; align-items: center; gap: 14px;
  }
  .benefit-num .ico {
    width: 28px; height: 28px;
    border: 1px solid var(--rule);
    border-radius: var(--radius-sm);
    display: inline-flex; align-items: center; justify-content: center;
    color: var(--ink-strong);
    background: var(--bg-raised);
    font-size: 14px;
  }
  .benefit h3 {
    font-size: 22px;
    letter-spacing: -0.015em;
    margin: 0 0 10px;
    max-width: 22ch;
  }
  .benefit p {
    margin: 0;
    color: var(--ink-muted);
    line-height: 1.55;
    max-width: 42ch;
  }

  /* ============================================================
     PERSONAS / "MADE FOR" CARDS
     ============================================================ */
  .personas {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  @media (max-width: 820px) { .personas { grid-template-columns: 1fr; } }
  .persona {
    background: var(--bg-surface);
    border: 1px solid var(--rule-soft);
    border-radius: var(--radius-sm);
    padding: 28px;
    display: flex; flex-direction: column; gap: 18px;
  }
  .persona-tag {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--accent);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--rule-faint);
  }
  .persona-quote {
    margin: 0;
    font-size: 16px;
    line-height: 1.55;
    color: var(--ink-strong);
    flex: 1;
    text-wrap: pretty;
  }
  .persona-by {
    display: flex; align-items: center; gap: 12px;
    border-top: 1px solid var(--rule-faint);
    padding-top: 16px;
  }
  .persona-meta {
    display: flex; flex-direction: column; gap: 2px;
  }
  .persona-lvl {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--ink-faint);
    letter-spacing: var(--tracking-snug);
    display: inline-flex; align-items: center; gap: 6px;
  }

  /* ============================================================
     FOUNDER NOTE
     ============================================================ */
  .founder { background: var(--bg-surface); }
  .founder-grid {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 56px;
    align-items: start;
  }
  @media (max-width: 720px) {
    .founder-grid { grid-template-columns: 1fr; gap: 32px; }
  }
  .founder-photo {
    width: 100%;
    aspect-ratio: 4/5;
    border: 1px solid var(--rule);
    border-radius: var(--radius-sm);
    background: var(--bg-page);
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 50px -28px rgba(26,22,18,0.38);
  }
  .founder-photo picture,
  .founder-photo img {
    display: block;
    width: 100%;
    height: 100%;
  }
  .founder-photo img {
    object-fit: cover;
    object-position: center;
  }
  .founder-body {
    font-size: var(--fs-lg);
    line-height: 1.55;
    color: var(--ink);
    max-width: 60ch;
  }
  .founder-body p { margin: 0 0 18px; }
  .founder-body p:last-child { margin: 0; }
  .founder-sig {
    margin-top: 24px;
    font-family: Georgia, "Times New Roman", serif;
    font-style: italic;
    color: var(--ink-muted);
    font-size: var(--fs-md);
  }

  /* ============================================================
     FAQ
     ============================================================ */
  .faq-list {
    border-top: 1px solid var(--rule-soft);
    max-width: 820px;
  }
  .faq {
    border-bottom: 1px solid var(--rule-soft);
  }
  .faq summary {
    list-style: none;
    cursor: pointer;
    padding: 22px 0;
    display: flex; justify-content: space-between; align-items: baseline;
    gap: 24px;
    font-size: 19px;
    font-weight: 500;
    color: var(--ink-strong);
    letter-spacing: -0.005em;
    transition: color .12s ease;
  }
  .faq summary::-webkit-details-marker { display: none; }
  .faq summary::after {
    content: "+";
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 22px;
    transition: transform .2s ease;
    flex-shrink: 0;
  }
  .faq[open] summary::after { content: "−"; }
  .faq summary:hover { color: var(--accent); }
  .faq-answer {
    padding: 0 0 24px;
    color: var(--ink-muted);
    font-size: var(--fs-md);
    line-height: 1.6;
    max-width: 65ch;
  }
  .faq-answer p { margin: 0 0 12px; }
  .faq-answer p:last-child { margin: 0; }

  /* ============================================================
     FINAL CTA
     ============================================================ */
  .final-cta {
    text-align: center;
    padding: 120px 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--rule-soft);
  }
  .final-cta h2 {
    font-size: var(--fs-display);
    line-height: 0.98;
    letter-spacing: -0.035em;
    margin: 0 auto 20px;
    max-width: 16ch;
  }
  .final-cta .section-sub {
    margin: 0 auto 36px;
    max-width: 52ch;
  }
  .final-cta .hero-form {
    margin: 0 auto 14px;
  }

  /* ============================================================
     FOOTER
     ============================================================ */
  .site-footer {
    padding: 48px 0 64px;
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--ink-faint);
    letter-spacing: var(--tracking-snug);
  }
  .footer-grid {
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 24px;
  }
  .lang-switch {
    display: inline-flex;
    border: 1px solid var(--rule);
    border-radius: var(--radius-sm);
    overflow: hidden;
  }
  .lang-switch button {
    background: var(--bg-raised);
    border: 0;
    border-right: 1px solid var(--rule-soft);
    padding: 6px 12px;
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--ink-muted);
    cursor: pointer;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
  }
  .lang-switch button:last-child { border-right: 0; }
  .lang-switch button.active { background: var(--accent); color: #fff; }
  /* ---------- Header lang switch ---------- */
  .lang-switch-header { /* compact variant for the header */
    height: 30px;
  }
  .lang-switch-header button {
    padding: 5px 9px;
    font-size: 10.5px;
    letter-spacing: 0.08em;
  }

  .footer-links {
    display: flex; gap: 22px; flex-wrap: wrap;
  }
  .footer-links a { color: var(--ink-muted); }
  .footer-links a:hover { color: var(--ink-strong); }

  /* ============================================================
     INLINE THANK-YOU STATE (after form submit)
     ============================================================ */
  .form-thanks {
    display: none;
    padding: 14px 16px;
    background: var(--accent-tint);
    border: 1px solid color-mix(in oklch, var(--accent) 28%, var(--rule-soft));
    border-left: 3px solid var(--accent);
    border-radius: var(--radius-sm);
    max-width: 440px;
  }
  .form-thanks.visible { display: block; }
  .form-thanks .ok {
    font-size: var(--fs-md);
    font-weight: 500;
    color: var(--ink-strong);
    margin-bottom: 4px;
  }
  .form-thanks .meta {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--ink-muted);
    letter-spacing: var(--tracking-snug);
    text-transform: uppercase;
  }
  .form-thanks .meta b { color: var(--accent); font-weight: 500; }

  /* ============================================================
     TWEAKS PANEL
     ============================================================ */
  #tweaks {
    position: fixed; right: 20px; bottom: 20px;
    width: 280px;
    background: var(--bg-raised);
    border: 1px solid var(--rule);
    border-radius: var(--radius-md);
    padding: 16px;
    box-shadow: 0 12px 32px -12px rgba(26,22,18,0.25);
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    z-index: 1000;
    display: none;
  }
  #tweaks.open { display: block; }
  .tweaks-head {
    display: flex; justify-content: space-between; align-items: baseline;
    border-bottom: 1px solid var(--rule-faint);
    padding-bottom: 10px; margin-bottom: 12px;
  }
  .tweaks-head .title {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--accent);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
  }
  .tweaks-head .close {
    border: 0; background: transparent;
    color: var(--ink-faint); cursor: pointer;
    font-family: var(--font-mono); font-size: 16px; line-height: 1;
  }
  .tweak-row {
    margin-bottom: 14px;
  }
  .tweak-label {
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--ink-faint);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    margin-bottom: 6px;
    display: block;
  }
  .tweak-swatches { display: flex; gap: 6px; }
  .tweak-swatch {
    width: 28px; height: 28px;
    border-radius: var(--radius-xs);
    border: 1px solid var(--rule);
    cursor: pointer;
    position: relative;
  }
  .tweak-swatch.active::after {
    content: ""; position: absolute; inset: -3px;
    border: 1px solid var(--ink-strong);
    border-radius: 5px;
  }
  .tweak-seg {
    display: flex; border: 1px solid var(--rule); border-radius: var(--radius-sm); overflow: hidden;
  }
  .tweak-seg button {
    flex: 1; background: var(--bg-raised); border: 0;
    border-right: 1px solid var(--rule-soft);
    padding: 7px 8px;
    font-family: var(--font-mono);
    font-size: var(--fs-micro);
    color: var(--ink-muted);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: var(--tracking-snug);
  }
  .tweak-seg button:last-child { border-right: 0; }
  .tweak-seg button.active { background: var(--accent); color: #fff; }

  /* Density tweak */
  body.density-tight section.lp { padding: 64px 0; }
  body.density-roomy section.lp { padding: 128px 0; }

  /* ============================================================
     MOBILE IMPROVEMENTS — refined for narrow viewports
     Added: comprehensive mobile audit pass
     ============================================================ */

  @media (max-width: 720px) {
    /* Shell — slightly tighter to claw back space */
    .shell { padding: 0 18px; }

    /* Header — denser on mobile */
    .site-header-inner { padding: 12px 0; }
    .nav-cta { gap: 6px; }

    /* Header lang switch — keep compact */
    .lang-switch-header { height: 28px; }
    .lang-switch-header button { padding: 4px 7px; font-size: 10px; }

    .theme-toggle {
      padding: 6px 8px;
      min-width: 32px;
      justify-content: center;
    }
    /* Hide the "Light/Dark" text label on phones — keep the affordance */
    .theme-toggle #themeLabel { display: none; }
    .theme-toggle::before {
      content: "◐";
      font-size: 13px;
      line-height: 1;
    }

    /* Hero — quieter, tighter */
    .hero { padding: 20px 0 40px; border-bottom: 0; }
    h1.hero-title {
      font-size: clamp(34px, 10.5vw, 44px);
      line-height: 1.02;
      letter-spacing: -0.025em;
      max-width: none;
      margin-bottom: 16px;
    }
    .hero-lede {
      font-size: 16px;
      line-height: 1.55;
      margin-bottom: 22px;
      max-width: none;
    }
    .eyebrow { margin-bottom: 14px; }

    /* Counter — controlled wrapping, kill orphan "today" */
    .counter { margin-top: 22px; gap: 8px; padding: 7px 10px; }
    .counter > span:last-child {
      margin-left: 0 !important;
      padding-left: 10px !important;
    }
    .hero-microcopy { font-size: 10.5px; line-height: 1.7; }

    /* Section rhythm — was 64px; tighter feels right on phones */
    section.lp { padding: 48px 0; }

    h2.section-h {
      font-size: clamp(28px, 7vw, 36px);
      letter-spacing: -0.02em;
      line-height: 1.1;
      max-width: none;
      margin-bottom: 14px;
    }
    .section-sub {
      font-size: 16px;
      margin-bottom: 36px;
      max-width: none;
    }
    .section-eyebrow { margin-bottom: 16px; }

    /* Browser frame — strip chrome noise on mobile */
    .browser { border-radius: 6px; width: 100%; max-width: 100%; min-width: 0; }
    .hero-demo, .demo-pair > div:first-child, .device-desktop, .device-mobile { min-width: 0; }
    .browser-chrome { padding: 8px 10px; gap: 8px; }
    .browser-dots { display: none; }                      /* dots → noise on small screens */
    .browser-url {
      font-size: 10px;
      padding: 3px 8px;
      text-align: left;
      max-width: none;
    }
    .browser-meta { display: none; }                      /* meta tag → already in URL context */

    /* Hero browser screenshot caption — readability */
    .hero-demo-caption {
      font-size: 10px;
      text-align: left;
      justify-content: flex-start;
      flex-wrap: wrap;
      gap: 6px;
      line-height: 1.6;
    }

    /* Reveal CTA — position controlled by --screen-cta-y to avoid conflicting top/bottom rules */
    .screen-cta {
      padding: 8px 12px;
      font-size: 10.5px;
      letter-spacing: 0.06em;
      box-shadow: 0 6px 18px -6px rgba(196,98,58,0.55), 0 0 0 3px rgba(255,255,255,0.55);
    }

    /* Demo screenshots — on mobile, crop to focus on the BILINGUAL passage
       (the part with the blurred Spanish) so the reveal interaction happens
       where the user is looking. */
    .hero-demo .browser-screen,
    .demo-pair .browser-screen {
      aspect-ratio: 354 / 290;
      overflow: hidden;
    }
    .hero-demo .browser-screen img,
    .demo-pair .browser-screen img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: 0 68%;       /* focus on the bilingual passage area */
      min-width: 0;
    }
    /* Keep both blur/unblur layers identically sized so the reveal aligns */
    .screen-toggle .screen-on {
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: 0 68%;
    }
    /* Trainer screenshot in the practice section — focus on the flashcard
       (the centerpiece), not the chrome at top or stats at bottom. */
    .device-desktop .browser-screen {
      aspect-ratio: 354 / 260;
      overflow: hidden;
    }
    .device-desktop .browser-screen img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: 0 38%;
      min-width: 0;
    }
    /* Reveal CTA sits over the blurred translation area; tune one variable instead of top/bottom overrides */
    .hero-demo .screen-toggle,
    .demo-pair .screen-toggle {
      --screen-cta-y: 74%;
    }
    .hero-demo .screen-cta {
      padding: 10px 16px;
      font-size: 11.5px;
      letter-spacing: 0.07em;
    }

    /* HOW IT WORKS — gentler */
    .step { padding: 24px 0; }
    .step h3 { font-size: 19px; }
    .step p { font-size: 15px; max-width: none; }
    .step-num { margin-bottom: 14px; }
    .step-num .glyph { width: 30px; height: 30px; font-size: 14px; }

    /* DEMO callouts */
    .demo-callouts { margin-top: 32px; gap: 28px; }
    .callout-list li {
      grid-template-columns: 28px 1fr;
      gap: 12px;
      padding: 16px 0;
    }
    .callout-list h4 { font-size: 15px; }
    .callout-list p { font-size: 13.5px; }
    .demo-caption { font-size: 10px; text-align: left; }

    /* WHY — denser cards */
    .benefit { padding: 26px 22px; }
    .benefit h3 { font-size: 19px; max-width: none; }
    .benefit p { font-size: 15px; max-width: none; }
    .benefit-num { margin-bottom: 12px; }
    .benefit-num .ico { width: 24px; height: 24px; font-size: 12px; }

    /* PERSONAS */
    .personas { gap: 16px; }
    .persona { padding: 22px; gap: 14px; }
    .persona-quote { font-size: 15px; }

    /* FOUNDER */
    .founder-photo { max-width: 220px; margin: 0 auto; }
    .founder-body { font-size: 17px; }

    /* FAQ — tighter rows on phones */
    .faq summary { padding: 18px 0; font-size: 17px; gap: 16px; }
    .faq summary::after { font-size: 19px; }
    .faq-answer { padding-bottom: 20px; font-size: 15px; }
    .faq-answer p { margin-bottom: 10px; }

    /* PRACTICE ANYWHERE — phone frame can be a bit bigger on real mobile */
    .device-mobile .phone { max-width: 260px; }
    .device-caption { font-size: 10px; }
    .devices { gap: 32px; }

    /* FINAL CTA — was 120px top+bottom, far too much */
    .final-cta { padding: 56px 0 64px; }
    .final-cta h2 {
      font-size: clamp(32px, 8.5vw, 44px);
      line-height: 1.05;
      max-width: none;
      margin-bottom: 14px;
    }
    .final-cta .section-sub { margin-bottom: 28px; }
    .final-cta .hero-form { max-width: 100%; }
    .final-cta .consent-row { max-width: 100%; }

    /* FOOTER — stack to kill the brand/contact overlap bug */
    .site-footer { padding: 36px 0 48px; }
    .footer-grid {
      flex-direction: column;
      align-items: flex-start;
      gap: 18px;
    }
    .footer-grid > span:last-child { /* "Made in Germany..." */
      order: 4;
      font-size: 10.5px;
      line-height: 1.6;
    }
    .footer-links { gap: 18px; }

    /* Hero form — already column at <480; keep parity at <720 too for safer thumb-targets */
    .hero-form { max-width: 100%; }
    .consent-row { max-width: 100%; }
    .form-thanks { max-width: 100%; }

    /* Tweaks panel — keep out of the way on mobile */
    #tweaks {
      right: 12px;
      bottom: 12px;
      width: calc(100vw - 24px);
      max-width: 280px;
    }
  }

  /* Very narrow phones — extra polish */
  @media (max-width: 380px) {
    .shell { padding: 0 16px; }
    h1.hero-title { font-size: 32px; }
    h2.section-h { font-size: 26px; }
    .browser-url { font-size: 9.5px; }
    /* Hide "Get my code" header CTA — they'll scroll to the form */
    .site-header .nav-cta a[href="#signup"] { display: none; }
  }