/* ---- tokens ---- */
/* Design tokens — "Cyber Control Room" (design/design-doc-gpt.md §2) */
:root {
  --bg: #07111F;
  --bg-2: #0A1628;
  --panel: #0E1B2B;
  --panel-2: #132438;
  --line: rgba(243, 247, 251, 0.10);
  --line-strong: rgba(243, 247, 251, 0.18);
  --text: #F3F7FB;
  --text-2: #B9C6D6;
  --muted: #8A9AB0;
  --safe: #2FE6D1;
  --safe-ink: #063B36;
  --accent: #5B7CFA;
  --accent-ink: #0B1340;
  --warn: #FFB84D;
  --warn-ink: #3A2600;
  --danger: #FF5F6D;
  --danger-ink: #3B0A10;
  --grad: linear-gradient(120deg, #5B7CFA 0%, #2FE6D1 100%);
  --glow-safe: 0 0 0 1px rgba(47, 230, 209, 0.35), 0 0 24px rgba(47, 230, 209, 0.25);
  --glow-accent: 0 0 0 1px rgba(91, 124, 250, 0.4), 0 0 28px rgba(91, 124, 250, 0.3);
  --glow-danger: 0 0 0 1px rgba(255, 95, 109, 0.4), 0 0 24px rgba(255, 95, 109, 0.25);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --font-head: 'Noto Sans Thai', 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: 'Sarabun', 'Noto Sans Thai', 'Inter', system-ui, sans-serif;
  --font-ui: 'Inter', 'Noto Sans Thai', system-ui, sans-serif;
  --fs-0: 0.875rem;
  --fs-1: 1rem;
  --fs-2: 1.125rem;
  --fs-3: 1.375rem;
  --fs-4: 1.75rem;
  --fs-5: clamp(2rem, 1.5rem + 2.2vw, 3rem);
  --fs-6: clamp(2.4rem, 1.6rem + 3.4vw, 4rem);
  --lh-body: 1.75;
  --lh-head: 1.25;
  --measure: 68ch;
  --container: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
  --dur-fast: 160ms;
  --dur: 240ms;
  --dur-slow: 420ms;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --focus: 0 0 0 3px var(--bg), 0 0 0 6px var(--safe);
  color-scheme: dark;
}

/* ---- fonts ---- */
/* Self-hosted fonts, SIL Open Font License 1.1. Generated by tools/fonts-fetch.py */
/* latin */
@font-face {font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('/assets/fonts/Inter-400-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* latin */
@font-face {font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('/assets/fonts/Inter-600-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* latin */
@font-face {font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('/assets/fonts/Inter-700-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* thai */
@font-face {font-family: 'Noto Sans Thai';
  font-style: normal;
  font-weight: 400;
  font-stretch: 100%;
  font-display: swap;
  src: url('/assets/fonts/NotoSansThai-400-thai.woff2') format('woff2');
  unicode-range: U+02D7, U+0303, U+0331, U+0E01-0E5B, U+200C-200D, U+25CC;
}
/* latin */
@font-face {font-family: 'Noto Sans Thai';
  font-style: normal;
  font-weight: 400;
  font-stretch: 100%;
  font-display: swap;
  src: url('/assets/fonts/NotoSansThai-400-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* thai */
@font-face {font-family: 'Noto Sans Thai';
  font-style: normal;
  font-weight: 600;
  font-stretch: 100%;
  font-display: swap;
  src: url('/assets/fonts/NotoSansThai-600-thai.woff2') format('woff2');
  unicode-range: U+02D7, U+0303, U+0331, U+0E01-0E5B, U+200C-200D, U+25CC;
}
/* latin */
@font-face {font-family: 'Noto Sans Thai';
  font-style: normal;
  font-weight: 600;
  font-stretch: 100%;
  font-display: swap;
  src: url('/assets/fonts/NotoSansThai-600-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* thai */
@font-face {font-family: 'Noto Sans Thai';
  font-style: normal;
  font-weight: 700;
  font-stretch: 100%;
  font-display: swap;
  src: url('/assets/fonts/NotoSansThai-700-thai.woff2') format('woff2');
  unicode-range: U+02D7, U+0303, U+0331, U+0E01-0E5B, U+200C-200D, U+25CC;
}
/* latin */
@font-face {font-family: 'Noto Sans Thai';
  font-style: normal;
  font-weight: 700;
  font-stretch: 100%;
  font-display: swap;
  src: url('/assets/fonts/NotoSansThai-700-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* thai */
@font-face {font-family: 'Sarabun';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('/assets/fonts/Sarabun-400-thai.woff2') format('woff2');
  unicode-range: U+02D7, U+0303, U+0331, U+0E01-0E5B, U+200C-200D, U+25CC;
}
/* latin */
@font-face {font-family: 'Sarabun';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('/assets/fonts/Sarabun-400-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* thai */
@font-face {font-family: 'Sarabun';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('/assets/fonts/Sarabun-600-thai.woff2') format('woff2');
  unicode-range: U+02D7, U+0303, U+0331, U+0E01-0E5B, U+200C-200D, U+25CC;
}
/* latin */
@font-face {font-family: 'Sarabun';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('/assets/fonts/Sarabun-600-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* thai */
@font-face {font-family: 'Sarabun';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('/assets/fonts/Sarabun-700-thai.woff2') format('woff2');
  unicode-range: U+02D7, U+0303, U+0331, U+0E01-0E5B, U+200C-200D, U+25CC;
}
/* latin */
@font-face {font-family: 'Sarabun';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('/assets/fonts/Sarabun-700-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* ---- base ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  margin: 0;
  background: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 80% -10%, rgba(91, 124, 250, 0.18), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(47, 230, 209, 0.10), transparent 60%);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-2);
  line-height: var(--lh-body);
  min-height: 100vh;
  overflow-x: hidden;
}
img, picture, svg, video { max-width: 100%; height: auto; display: block; }
h1, h2, h3, h4 { font-family: var(--font-head); line-height: var(--lh-head); margin: 0 0 var(--space-2); font-weight: 700; letter-spacing: -0.01em; }
h1 { font-size: var(--fs-5); }
h2 { font-size: var(--fs-4); margin-top: var(--space-4); }
h3 { font-size: var(--fs-3); margin-top: var(--space-3); }
h4 { font-size: var(--fs-2); }
p, ul, ol, dl { margin: 0 0 var(--space-2); }
p { max-width: var(--measure); }
a { color: var(--safe); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: #7ff2e3; }
:focus-visible { outline: none; box-shadow: var(--focus); border-radius: 6px; }
button { font: inherit; color: inherit; }
code { font-family: ui-monospace, 'Cascadia Mono', Consolas, monospace; font-size: 0.9em; background: rgba(255,255,255,0.06); padding: 0.1em 0.4em; border-radius: 6px; }
strong { color: #fff; }
table { border-collapse: collapse; width: 100%; margin: var(--space-2) 0 var(--space-3); font-size: var(--fs-1); }
th, td { text-align: left; vertical-align: top; padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--line); }
th { color: var(--text-2); font-family: var(--font-head); font-weight: 600; background: rgba(255,255,255,0.03); }
blockquote { margin: 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: var(--space-4) 0; }
::selection { background: rgba(47, 230, 209, 0.35); }

.container { width: min(100% - 2 * var(--gutter), var(--container)); margin-inline: auto; }
.section { padding-block: var(--space-4); }
.section--panel { background: linear-gradient(180deg, rgba(14, 27, 43, 0.9), rgba(14, 27, 43, 0.6)); border-block: 1px solid var(--line); }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: absolute; left: 1rem; top: -4rem; background: var(--safe); color: var(--safe-ink); padding: 0.6rem 1rem; border-radius: var(--radius-sm); z-index: 100; font-weight: 700; }
.skip-link:focus { top: 1rem; }
.muted { color: var(--muted); }
.small { font-size: var(--fs-0); }
.lead { font-size: var(--fs-3); color: var(--text-2); line-height: 1.6; max-width: 60ch; }
.eyebrow { font-family: var(--font-ui); font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--safe); margin-bottom: var(--space-1); font-weight: 600; }
.eyebrow .num { color: var(--accent); margin-right: 0.3em; }
.prose > :first-child { margin-top: 0; }
.prose ul, .prose ol { padding-left: 1.4em; max-width: var(--measure); }
.prose li { margin-bottom: 0.4em; }
.prose li::marker { color: var(--safe); }
.prose h4 { margin-top: var(--space-3); color: var(--text-2); }
.prose table { display: block; overflow-x: auto; }
.prose--page { max-width: 80ch; }
.prose--page h2 { margin-top: var(--space-4); }
.link-button { background: none; border: 0; padding: 0; color: var(--safe); text-decoration: underline; cursor: pointer; font-size: inherit; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; backdrop-filter: blur(14px); background: rgba(7, 17, 31, 0.78); border-bottom: 1px solid var(--line); }
.site-header__inner { display: flex; align-items: center; gap: var(--space-2); min-height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--text); text-decoration: none; font-family: var(--font-head); font-weight: 700; font-size: 1.1rem; margin-right: auto; }
.brand__mark { display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 10px; background: var(--panel); box-shadow: var(--glow-accent); }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 0.25rem; align-items: center; }
.site-nav a { display: inline-block; padding: 0.5rem 0.8rem; border-radius: var(--radius-pill); color: var(--text-2); text-decoration: none; font-family: var(--font-ui); font-weight: 600; font-size: 0.95rem; transition: background var(--dur-fast), color var(--dur-fast); }
.site-nav a:hover, .site-nav a[aria-current="page"] { background: rgba(255,255,255,0.06); color: var(--text); }
.site-nav a.nav-emphasis { color: var(--danger); border: 1px solid rgba(255, 95, 109, 0.4); }
.site-nav a.nav-emphasis:hover { background: rgba(255,95,109,0.12); }
.site-nav { display: flex; align-items: center; gap: var(--space-2); }
.motion-toggle { display: inline-flex; align-items: center; gap: 0.4rem; background: transparent; border: 1px solid var(--line-strong); border-radius: var(--radius-pill); padding: 0.4rem 0.8rem; font-size: 0.8rem; color: var(--text-2); cursor: pointer; font-family: var(--font-ui); }
.motion-toggle[aria-pressed="true"] { background: rgba(47,230,209,0.12); color: var(--safe); border-color: var(--safe); }
.nav-toggle { display: none; background: transparent; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); padding: 0.5rem 0.8rem; cursor: pointer; gap: 0.5rem; align-items: center; font-family: var(--font-ui); font-size: 0.9rem; }
.nav-toggle__bars { width: 18px; height: 2px; background: currentColor; box-shadow: 0 -6px 0 currentColor, 0 6px 0 currentColor; display: inline-block; }
@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .site-nav { display: none; position: absolute; left: 0; right: 0; top: 100%; background: var(--bg-2); border-bottom: 1px solid var(--line); padding: var(--space-2) var(--gutter) var(--space-3); flex-direction: column; align-items: stretch; }
  .site-nav.is-open { display: flex; }
  .site-nav ul { flex-direction: column; align-items: stretch; }
  .site-nav a { display: block; padding: 0.8rem 1rem; }
}

/* Breadcrumbs */
.breadcrumbs { font-size: var(--fs-0); padding-block: var(--space-2) 0; }
.breadcrumbs ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.4rem; color: var(--muted); }
.breadcrumbs li + li::before { content: '/'; margin-right: 0.4rem; color: var(--line-strong); }
.breadcrumbs a { color: var(--text-2); }

/* Footer */
.site-footer { margin-top: var(--space-6); border-top: 1px solid var(--line); background: var(--bg-2); padding-block: var(--space-4); font-size: var(--fs-1); }
.site-footer__grid { display: grid; gap: var(--space-3); grid-template-columns: 1.4fr 1fr 1.2fr; }
.site-footer__brand { font-family: var(--font-head); font-weight: 700; font-size: 1.2rem; margin-bottom: 0.2rem; }
.site-footer__tagline { color: var(--safe); margin-bottom: var(--space-2); }
.site-footer__links { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.3rem; }
.site-footer a { color: var(--text-2); }
@media (max-width: 760px) { .site-footer__grid { grid-template-columns: 1fr; } }

/* Page head */
.page-head { padding-block: var(--space-4) var(--space-2); }
.page-head--with-mascot { display: grid; grid-template-columns: 1fr auto; gap: var(--space-3); align-items: center; }
.page-head__mascot { width: clamp(120px, 20vw, 220px); justify-self: end; }
@media (max-width: 640px) { .page-head--with-mascot { grid-template-columns: 1fr; } .page-head__mascot { justify-self: start; width: 140px; } }

/* Print: checklists and lessons on paper, no chrome */
@media print {
  body { background: #fff; color: #000; font-size: 12pt; }
  .site-header, .site-footer, .breadcrumbs, .lesson-toc, .lesson-hero__scene, .mascot, .hero__console, .btn, .quote-card__actions, .lesson-nav, .flip__actions, .scenario__device, .skip-link, .toast { display: none !important; }
  a { color: #000; text-decoration: none; }
  sup.cite a::after { content: ''; }
  .card, .tldr__box, .callout, .quiz, .checklist label, .attack-path, .glossary > div { border: 1px solid #999; background: #fff; color: #000; box-shadow: none; }
  .checklist input { -webkit-appearance: checkbox; appearance: checkbox; }
  .reveal { opacity: 1 !important; transform: none !important; }
  h1, h2, h3, strong { color: #000; }
  .hero__title { -webkit-text-fill-color: #000; color: #000; background: none; }
}

/* Long tokens (URLs, IDs, English names) must never widen the page */
p, li, dd, td, th, blockquote, .sample, .bubble, .urlbox, .tldr__box, .scenario__caller { overflow-wrap: anywhere; }
.tldr__grid > *, .lesson-grid > *, .question-card > *, .card > *, .path__head > * { min-width: 0; }
.filter-bar label { max-width: 100%; flex-wrap: wrap; }
.filter-bar select { max-width: 100%; min-width: 0; }

/* ---- components ---- */
/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.7rem 1.3rem; border-radius: var(--radius-pill); border: 1px solid transparent; font-family: var(--font-ui); font-weight: 700; font-size: 1rem; text-decoration: none; cursor: pointer; min-height: 44px; transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast), background var(--dur-fast); }
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--primary { background: var(--grad); color: var(--accent-ink); box-shadow: var(--glow-safe); }
.btn--primary:hover { color: var(--accent-ink); box-shadow: 0 0 0 1px rgba(47,230,209,0.5), 0 0 34px rgba(47,230,209,0.35); }
.btn--secondary { background: rgba(255,255,255,0.05); color: var(--text); border-color: var(--line-strong); }
.btn--secondary:hover { background: rgba(255,255,255,0.1); color: var(--text); }
.btn--ghost { background: transparent; color: var(--text-2); border-color: var(--line); }
.btn--ghost:hover { color: var(--text); border-color: var(--line-strong); }
.btn--danger { background: var(--danger); color: var(--danger-ink); box-shadow: var(--glow-danger); }
.btn--danger:hover { color: var(--danger-ink); }
.btn--small { padding: 0.4rem 0.9rem; font-size: 0.9rem; min-height: 36px; }
.btn--large { padding: 0.9rem 1.7rem; font-size: 1.1rem; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; transform: none; }

/* Chips */
.chip-row { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.6rem; }
.chip { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.5rem 1rem; border-radius: var(--radius-pill); border: 1px solid var(--line-strong); color: var(--text); text-decoration: none; font-family: var(--font-ui); font-weight: 600; font-size: 0.95rem; background: rgba(255,255,255,0.03); cursor: pointer; min-height: 40px; }
.chip:hover { border-color: var(--safe); color: var(--safe); }
.chip--toggle input { position: absolute; opacity: 0; pointer-events: none; }
.chip--toggle:has(input:checked) { background: rgba(47,230,209,0.14); border-color: var(--safe); color: var(--safe); }
.chip--toggle:has(input:focus-visible) { box-shadow: var(--focus); }
.filter-bar { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-3); align-items: center; margin-top: var(--space-2); }
.filter-chips { border: 0; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.filter-bar label { display: inline-flex; align-items: center; gap: 0.5rem; font-family: var(--font-ui); font-size: 0.95rem; color: var(--text-2); }
input[type="search"], input[type="text"], input[type="password"], input[type="url"], select, textarea { background: var(--panel); color: var(--text); border: 1px solid var(--line-strong); border-radius: var(--radius-sm); padding: 0.6rem 0.9rem; font: inherit; font-size: 1rem; min-height: 44px; }
input::placeholder { color: var(--muted); }
select option { color: #000; }

/* Cards */
.card { display: flex; flex-direction: column; background: linear-gradient(180deg, rgba(19,36,56,0.95), rgba(14,27,43,0.95)); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-2); color: var(--text); text-decoration: none; position: relative; overflow: hidden; transition: transform var(--dur) var(--ease), border-color var(--dur), box-shadow var(--dur); }
.card::before { content: ''; position: absolute; inset: 0 0 auto 0; height: 2px; background: var(--grad); opacity: 0; transition: opacity var(--dur); }
.card:hover { transform: translateY(-4px); border-color: rgba(47,230,209,0.45); box-shadow: var(--shadow); }
.card:hover::before { opacity: 1; }
.card-grid { display: grid; gap: var(--space-2); }
.card-grid--2 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 420px), 1fr)); }
.card-grid--3 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); }
.card-grid--4 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr)); }
.lesson-card { flex-direction: row; gap: var(--space-2); align-items: flex-start; }
.lesson-card__media { flex: 0 0 84px; width: 84px; }
.lesson-card__media .mascot img { width: 100%; filter: drop-shadow(0 8px 14px rgba(0,0,0,0.45)); }
.lesson-card__body { min-width: 0; }
.lesson-card__title { font-size: 1.15rem; margin: 0.2rem 0 0.4rem; }
.lesson-card__sub { color: var(--text-2); font-size: var(--fs-1); margin-bottom: 0.6rem; }
.lesson-card__cta { font-family: var(--font-ui); font-weight: 700; color: var(--safe); font-size: 0.95rem; }
.lesson-card.is-done .lesson-card__cta::before { content: '✓ เรียนแล้ว · '; color: var(--text-2); }
.card-grid--4 .lesson-card { flex-direction: column; }
.card-grid--4 .lesson-card__media { width: 72px; flex-basis: auto; }
.path-card { flex-direction: row; gap: var(--space-2); }
.path-card__media { flex: 0 0 110px; }
.path-card__body h3 { margin-top: 0; }
.tool-card { flex-direction: row; gap: var(--space-2); align-items: center; }
.tool-card__media { flex: 0 0 110px; }
.tool-card h2 { margin: 0 0 0.3rem; font-size: 1.3rem; }
@media (max-width: 520px) { .path-card, .tool-card { flex-direction: column; } }

/* Mascot */
.mascot { display: block; }
.mascot img { width: 100%; height: auto; filter: drop-shadow(0 18px 30px rgba(0,0,0,0.5)); }
.mascot--hero img { filter: drop-shadow(0 30px 50px rgba(0,0,0,0.6)) drop-shadow(0 0 40px rgba(47,230,209,0.18)); }

/* Hero */
.hero { padding-block: var(--space-5) var(--space-4); position: relative; }
.hero__inner { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: var(--space-4); align-items: center; }
.hero__title { font-size: var(--fs-6); margin-bottom: var(--space-2); background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: var(--space-3) 0 var(--space-2); }
.hero__scene { position: relative; display: grid; place-items: center; min-height: 420px; }
.hero__scene .mascot { position: relative; z-index: 2; width: min(100%, 420px); }
.hero__console { position: absolute; inset: 0; z-index: 1; pointer-events: none; }
.hero__ring { position: absolute; left: 50%; top: 58%; border-radius: 50%; border: 1px solid rgba(47,230,209,0.25); transform: translate(-50%, -50%); }
.hero__ring--1 { width: 380px; height: 380px; box-shadow: inset 0 0 60px rgba(91,124,250,0.15); }
.hero__ring--2 { width: 520px; height: 520px; border-style: dashed; opacity: 0.6; }
.hero__incoming { position: absolute; padding: 0.5rem 0.9rem; border-radius: var(--radius-sm); background: var(--panel); border: 1px solid var(--line-strong); font-size: 0.85rem; font-family: var(--font-ui); box-shadow: var(--shadow); white-space: nowrap; }
.hero__incoming--call { left: -4%; top: 14%; border-color: rgba(255,95,109,0.5); }
.hero__incoming--sms { right: -6%; top: 30%; border-color: rgba(255,184,77,0.5); }
.hero__incoming--shield { left: 2%; bottom: 8%; border-color: rgba(47,230,209,0.6); color: var(--safe); }
@media (max-width: 900px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__scene { min-height: 320px; order: -1; }
  .hero__scene .mascot { width: min(60vw, 300px); }
  .hero__ring--1 { width: 260px; height: 260px; } .hero__ring--2 { width: 340px; height: 340px; }
  .hero__console { position: static; display: flex; flex-wrap: wrap; justify-content: center; gap: 0.4rem; order: 2; margin-top: var(--space-2); width: 100%; }
  .hero__incoming { position: static; font-size: 0.8rem; white-space: normal; }
  .hero__ring { top: 40%; }
}

/* Quote cards */
.quote-grid { display: grid; gap: var(--space-2); grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); }
.quote-card { margin: 0; background: var(--panel); border: 1px solid var(--line); border-left: 4px solid var(--safe); border-radius: var(--radius-sm); padding: var(--space-2) var(--space-3); }
.quote-card blockquote { font-family: var(--font-head); font-size: 1.35rem; font-weight: 700; line-height: 1.4; margin-bottom: var(--space-2); }
.quote-card figcaption { font-size: var(--fs-0); color: var(--muted); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem; align-items: center; }
.quote-card__actions { display: inline-flex; gap: 0.4rem; }
.daily-line .quote-card { max-width: 720px; }
.daily-line .quote-card blockquote { font-size: clamp(1.4rem, 1rem + 1.6vw, 2rem); }

/* Stats */
.stat-grid { display: grid; gap: var(--space-2); grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-3); }
.stat__value { font-family: var(--font-head); font-size: 2.4rem; font-weight: 700; color: var(--safe); margin-bottom: 0.3rem; line-height: 1; }
.stat__suffix { font-size: 1.1rem; margin-left: 0.2em; color: var(--text-2); }
.stat__claim { margin-bottom: 0.4rem; }

/* Callouts */
.callout { background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: var(--space-2) var(--space-3); margin: var(--space-2) 0 var(--space-3); }
.callout__title { font-family: var(--font-head); font-weight: 700; margin-bottom: 0.5rem; }
.callout--help { border-color: rgba(255,95,109,0.5); background: rgba(255,95,109,0.07); }
.callout--help ol { counter-reset: step; list-style: none; padding-left: 0; }
.callout--help ol > li { counter-increment: step; position: relative; padding-left: 2.4rem; margin-bottom: 0.6rem; }
.callout--help ol > li::before { content: counter(step); position: absolute; left: 0; top: 0.15em; width: 1.7rem; height: 1.7rem; border-radius: 50%; background: var(--danger); color: var(--danger-ink); font-weight: 700; display: grid; place-items: center; font-size: 0.9rem; font-family: var(--font-ui); }
.callout--debate { border-color: rgba(255,184,77,0.5); background: rgba(255,184,77,0.06); }
.callout--safe { border-color: rgba(47,230,209,0.5); background: rgba(47,230,209,0.06); }
.example-note { font-size: var(--fs-0); color: var(--warn); background: rgba(255,184,77,0.08); border: 1px dashed rgba(255,184,77,0.5); border-radius: var(--radius-sm); padding: 0.4rem 0.8rem; display: inline-block; }

/* Sources */
.sources { margin-top: var(--space-4); padding-top: var(--space-3); border-top: 1px solid var(--line); font-size: var(--fs-1); }
.sources__list { padding-left: 1.6em; }
.sources__list li { margin-bottom: 0.5rem; }
.sources__list li:target { background: rgba(47,230,209,0.12); outline: 1px solid var(--safe); border-radius: 6px; padding: 0.2rem 0.4rem; }
.sources__meta { color: var(--muted); font-size: var(--fs-0); }
.sources__domain { color: var(--text-2); }
sup.cite { font-size: 0.7em; line-height: 0; margin-left: 0.1em; }
sup.cite a { text-decoration: none; color: var(--accent); font-family: var(--font-ui); }
sup.cite a:hover { color: var(--safe); }
.sources-group { border: 1px solid var(--line); border-radius: var(--radius-sm); margin-bottom: var(--space-2); padding: 0.6rem var(--space-2); background: var(--panel); }
.sources-group summary { cursor: pointer; padding: 0.3rem 0; }
.sources-group .sources { margin-top: var(--space-2); padding-top: var(--space-2); }

/* Glossary */
.glossary { display: grid; gap: 0.8rem; }
.glossary > div { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0.8rem var(--space-2); }
.glossary dt { font-family: var(--font-head); font-weight: 700; color: var(--safe); margin-bottom: 0.2rem; }
.glossary dd { margin: 0; color: var(--text-2); }

/* Help page */
.big-steps { list-style: none; counter-reset: s; padding: 0; margin: var(--space-3) 0; display: grid; gap: var(--space-2); max-width: 760px; }
.big-steps > li { counter-increment: s; position: relative; padding: var(--space-2) var(--space-3) var(--space-2) 5rem; background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius); }
.big-steps > li::before { content: counter(s); position: absolute; left: var(--space-2); top: var(--space-2); width: 3rem; height: 3rem; border-radius: 50%; background: var(--danger); color: var(--danger-ink); font-family: var(--font-head); font-size: 1.5rem; font-weight: 700; display: grid; place-items: center; }
.big-steps h2 { margin: 0 0 0.4rem; font-size: 1.4rem; }
.big-steps p { margin: 0; }
.channel-grid { display: grid; gap: var(--space-2); grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); }
.channel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-2) var(--space-3); }
.channel__name { font-family: var(--font-head); font-weight: 700; margin-bottom: 0.2rem; }
.channel__phone { font-size: 1.6rem; font-family: var(--font-head); font-weight: 700; margin-bottom: 0.3rem; }
.channel__phone a { text-decoration: none; }
.help-banner { display: grid; grid-template-columns: auto 1fr; gap: var(--space-3); align-items: center; background: rgba(255,95,109,0.08); border: 1px solid rgba(255,95,109,0.45); border-radius: var(--radius); padding: var(--space-3); }
.help-banner__mascot { width: 140px; }
.help-banner h2 { margin-top: 0; }
.steps-inline { display: flex; flex-wrap: wrap; gap: 0.5rem 1.2rem; padding-left: 1.2em; font-weight: 600; }
@media (max-width: 640px) { .help-banner { grid-template-columns: 1fr; } }

/* Learn page */
.path { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-3); margin-bottom: var(--space-3); }
.path__head { display: grid; grid-template-columns: auto 1fr; gap: var(--space-3); align-items: center; }
.path__mascot { width: 120px; }
.path__head h2 { margin-top: 0; }
.timeline { list-style: none; padding: 0; margin: var(--space-3) 0 0; display: grid; gap: 0.6rem; position: relative; }
.timeline::before { content: ''; position: absolute; left: 1.1rem; top: 1rem; bottom: 1rem; width: 2px; background: linear-gradient(var(--accent), var(--safe)); opacity: 0.5; }
.timeline__item { display: flex; align-items: center; gap: var(--space-2); position: relative; padding-left: 0; }
.timeline__num { width: 2.2rem; height: 2.2rem; border-radius: 50%; background: var(--bg); border: 2px solid var(--accent); display: grid; place-items: center; font-family: var(--font-ui); font-weight: 700; font-size: 0.85rem; flex: 0 0 auto; z-index: 1; }
.timeline__item.is-done .timeline__num { background: var(--safe); color: var(--safe-ink); border-color: var(--safe); }
.timeline__item a { text-decoration: none; color: var(--text); }
.timeline__item a:hover strong { color: var(--safe); }
.timeline__done { color: var(--safe); }
.resume { background: rgba(47,230,209,0.08); border: 1px solid rgba(47,230,209,0.4); border-radius: var(--radius-sm); padding: 0.6rem var(--space-2); margin-top: var(--space-2); }
@media (max-width: 560px) { .path__head { grid-template-columns: 1fr; } .path__mascot { width: 90px; } }

/* Topic groups */
.topic-group { margin-bottom: var(--space-4); }
.topic-group h2 .small { font-family: var(--font-body); font-weight: 400; margin-left: 0.5rem; }
.topic-group[hidden] { display: none; }

/* Toast */
.toast { white-space: nowrap; max-width: calc(100vw - 2rem); overflow: hidden; text-overflow: ellipsis; position: fixed; left: 50%; bottom: 1.5rem; transform: translate(-50%, 20px); background: var(--safe); color: var(--safe-ink); padding: 0.7rem 1.2rem; border-radius: var(--radius-pill); font-family: var(--font-ui); font-weight: 700; opacity: 0; pointer-events: none; transition: opacity var(--dur), transform var(--dur) var(--ease); z-index: 90; }
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

/* ---- lesson ---- */
/* Lesson hero */
.lesson-hero { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: var(--space-3); align-items: center; padding-block: var(--space-3) var(--space-2); }
.lesson-hero h1 { font-size: var(--fs-5); max-width: 18ch; }
.lesson-hero__scene { display: grid; place-items: center; }
.scene-stage { position: relative; width: min(100%, 360px); }
.scene-stage::before { content: ''; position: absolute; inset: auto 10% -6% 10%; height: 18%; border-radius: 50%; background: radial-gradient(closest-side, rgba(47,230,209,0.35), transparent); filter: blur(8px); }
.scene-stage .mascot { position: relative; }
.lesson-progress { display: flex; align-items: center; gap: 0.8rem; margin-top: var(--space-2); font-family: var(--font-ui); font-size: 0.85rem; color: var(--text-2); }
.lesson-progress__bar { flex: 1; max-width: 320px; height: 8px; border-radius: 4px; background: rgba(255,255,255,0.08); position: relative; overflow: hidden; }
.lesson-progress__bar::after { content: ''; position: absolute; inset: 0; width: calc(var(--p) * 100%); background: var(--grad); border-radius: 4px; transition: width var(--dur-slow) var(--ease); }
@media (max-width: 760px) { .lesson-hero { grid-template-columns: 1fr; } .scene-stage { width: min(55vw, 260px); } }

/* Grid with TOC */
.lesson-grid { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: var(--space-4); align-items: start; }
.lesson-toc { position: sticky; top: 90px; }
.lesson-toc__details summary { cursor: pointer; font-family: var(--font-head); font-weight: 700; margin-bottom: 0.5rem; list-style: none; }
.lesson-toc ol { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.2rem; }
.lesson-toc a { display: block; padding: 0.45rem 0.8rem; border-radius: var(--radius-sm); color: var(--text-2); text-decoration: none; font-family: var(--font-ui); font-size: 0.9rem; border-left: 2px solid transparent; }
.lesson-toc a:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.lesson-toc a.is-active { color: var(--safe); border-left-color: var(--safe); background: rgba(47,230,209,0.06); }
.lesson-toc a.is-done::after { content: ' ✓'; color: var(--safe); }
.lesson-body { min-width: 0; }
@media (max-width: 900px) {
  .lesson-grid { grid-template-columns: 1fr; gap: var(--space-2); }
  .lesson-toc { position: static; }
  .lesson-toc__details { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0.6rem var(--space-2); }
  .lesson-toc ol { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}

/* TL;DR */
.tldr__grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: var(--space-2); }
.tldr__box { background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: var(--space-2) var(--space-3); }
.tldr__box--action { border-color: rgba(47,230,209,0.5); background: rgba(47,230,209,0.06); box-shadow: var(--glow-safe); }
.tldr__title { font-family: var(--font-head); font-weight: 700; color: var(--safe); margin-bottom: 0.6rem; }
.tldr__box ol, .tldr__box ul { padding-left: 1.3em; margin-bottom: 0; }
.tldr__box li { margin-bottom: 0.4rem; }
.tldr__box li::marker { color: var(--safe); font-weight: 700; }
@media (max-width: 700px) { .tldr__grid { grid-template-columns: 1fr; } }

/* Chapters */
.chapter { margin-top: var(--space-4); padding-top: var(--space-2); scroll-margin-top: 90px; }
.chapter > h2 { display: flex; align-items: center; gap: 0.8rem; margin-top: 0; }
.chapter__num { width: 2.4rem; height: 2.4rem; border-radius: 12px; background: var(--grad); color: var(--accent-ink); display: grid; place-items: center; font-family: var(--font-ui); font-size: 1.1rem; flex: 0 0 auto; }
.chapter h3 { color: var(--text); }
.prose--signals ul li { list-style: none; position: relative; padding-left: 1.6em; }
.prose--signals ul { padding-left: 0; }
.prose--signals ul li::before { content: '⚠'; position: absolute; left: 0; color: var(--warn); }

/* Question card */
.question-card { display: grid; grid-template-columns: 96px 1fr; gap: var(--space-2); align-items: center; background: linear-gradient(135deg, rgba(91,124,250,0.18), rgba(47,230,209,0.08)); border: 1px solid rgba(91,124,250,0.45); border-radius: var(--radius); padding: var(--space-3); }
.question-card__q { font-family: var(--font-head); font-size: clamp(1.3rem, 1rem + 1.2vw, 1.7rem); font-weight: 700; line-height: 1.4; margin-bottom: 0.5rem; }
.question-card__q2 { font-size: var(--fs-2); color: var(--text-2); }
@media (max-width: 520px) { .question-card { grid-template-columns: 1fr; } .question-card__mascot { width: 72px; } }

/* Attack path */
.attack-path { margin: var(--space-3) 0; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-2) var(--space-3); }
.attack-path__title { font-family: var(--font-head); font-weight: 700; margin-bottom: var(--space-2); }
.attack-path__steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.4rem; position: relative; }
.attack-path__steps::before { content: ''; position: absolute; left: 1.2rem; top: 1.5rem; bottom: 1.5rem; width: 2px; background: linear-gradient(var(--danger), var(--warn), var(--safe)); opacity: 0.6; }
.attack-path__btn { display: flex; align-items: center; gap: 0.9rem; width: 100%; text-align: left; background: transparent; border: 1px solid transparent; border-radius: var(--radius-sm); padding: 0.5rem; cursor: pointer; color: var(--text); font-family: var(--font-head); font-weight: 600; }
.attack-path__btn:hover { background: rgba(255,255,255,0.04); }
.attack-path__btn[aria-expanded="true"] { background: rgba(91,124,250,0.12); border-color: rgba(91,124,250,0.4); }
.attack-path__num { width: 2.4rem; height: 2.4rem; border-radius: 50%; background: var(--bg); border: 2px solid var(--danger); display: grid; place-items: center; flex: 0 0 auto; font-family: var(--font-ui); position: relative; z-index: 1; }
.attack-path__step--stop .attack-path__num { border-color: var(--safe); background: rgba(47,230,209,0.15); }
.attack-path__step--stop .attack-path__btn[aria-expanded="true"] { background: rgba(47,230,209,0.1); border-color: rgba(47,230,209,0.5); }
.attack-path__detail { padding: 0.4rem 0.5rem 0.8rem 3.8rem; color: var(--text-2); }
.attack-path__detail p { margin-bottom: 0.4rem; }
.attack-path__tip { color: var(--safe); }

/* Real vs fake flip cards */
.realfake { margin: var(--space-3) 0; }
.realfake__grid { display: grid; gap: var(--space-2); grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); margin-top: var(--space-2); }
.flip { position: relative; background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: var(--space-2); min-height: 220px; perspective: 1000px; }
.flip__label { font-family: var(--font-head); font-weight: 700; margin-bottom: 0.6rem; }
.flip__actions { display: flex; gap: 0.5rem; margin-top: var(--space-2); }
.flip__verdict { font-family: var(--font-head); font-weight: 700; font-size: 1.2rem; margin-bottom: 0.3rem; }
.flip__verdict[data-verdict="fake"] { color: var(--danger); }
.flip__verdict[data-verdict="real"] { color: var(--safe); }
.flip__result { font-weight: 600; margin-bottom: 0.5rem; }
.flip__result.is-correct { color: var(--safe); }
.flip__result.is-wrong { color: var(--warn); }
.flip__cues { padding-left: 1.2em; font-size: var(--fs-1); color: var(--text-2); }
.flip.is-flipped .flip__front { display: none; }
.flip.is-flipped { border-color: var(--accent); }
.sample { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0.8rem 1rem; font-size: 0.95rem; }
.sample p { margin-bottom: 0.3rem; max-width: none; }
.sample--sms, .sample--line, .sample--chat { border-radius: 18px 18px 18px 4px; background: #16263b; }
.sample--email { border-left: 3px solid var(--accent); }
.sample__from { color: var(--muted); font-size: var(--fs-0); }
.sample__subject { font-weight: 700; }
.sample__link { color: var(--accent); text-decoration: underline; word-break: break-all; font-family: ui-monospace, monospace; font-size: 0.85rem; }

/* Scenario simulator */
.scenario { margin: var(--space-3) 0; }
.scenario__device { max-width: 420px; margin-top: var(--space-2); }
.scenario__screen { background: #050b14; border: 6px solid #1a2a40; border-radius: 28px; padding: var(--space-3) var(--space-2); min-height: 360px; box-shadow: var(--shadow), inset 0 0 0 1px rgba(255,255,255,0.05); }
.scenario__incoming { text-align: center; padding-top: var(--space-3); }
.scenario__caller { font-family: var(--font-head); font-size: 1.5rem; font-weight: 700; margin-bottom: 0.2rem; }
.scenario__log { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.7rem; }
.scenario__log[hidden] { display: none; }
.bubble { max-width: 90%; padding: 0.7rem 1rem; border-radius: 18px; line-height: 1.5; font-size: 1rem; }
.bubble--them { background: #16263b; border-bottom-left-radius: 4px; justify-self: start; }
.bubble--me { background: rgba(47,230,209,0.18); border: 1px solid rgba(47,230,209,0.4); border-bottom-right-radius: 4px; justify-self: end; }
.bubble--note { background: transparent; border: 1px dashed var(--line-strong); color: var(--text-2); font-size: 0.95rem; justify-self: stretch; max-width: 100%; }
.bubble--note.is-safe { border-color: var(--safe); color: var(--safe); }
.bubble--note.is-risky { border-color: var(--danger); color: var(--danger); }
.bubble--note.is-partial { border-color: var(--warn); color: var(--warn); }
.scenario__choices { display: grid; gap: 0.5rem; }
.scenario__choices .btn { justify-content: flex-start; text-align: left; white-space: normal; border-radius: 14px; }
.scenario__timer { font-family: var(--font-ui); font-size: 0.8rem; color: var(--warn); text-align: center; }
.scenario__end { text-align: center; padding: var(--space-2); }

/* Quiz */
.quiz { margin: var(--space-3) 0; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-2) var(--space-3); }
.quiz__item { border: 0; padding: 0; margin: 0 0 var(--space-3); }
.quiz__item legend { font-family: var(--font-head); font-weight: 700; margin-bottom: 0.6rem; font-size: 1.1rem; }
.quiz__option { display: flex; gap: 0.7rem; align-items: flex-start; padding: 0.6rem 0.8rem; border: 1px solid var(--line); border-radius: var(--radius-sm); margin-bottom: 0.4rem; cursor: pointer; }
.quiz__option:hover { border-color: var(--line-strong); background: rgba(255,255,255,0.03); }
.quiz__option input { margin-top: 0.35rem; accent-color: var(--safe); }
.quiz__option.is-correct { border-color: var(--safe); background: rgba(47,230,209,0.1); }
.quiz__option.is-wrong { border-color: var(--danger); background: rgba(255,95,109,0.1); }
.quiz__feedback { margin-top: 0.4rem; padding: 0.6rem 0.9rem; border-radius: var(--radius-sm); background: rgba(91,124,250,0.12); font-size: var(--fs-1); }
.quiz__feedback p { margin: 0; }

/* Checklist */
.checklist { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.4rem; }
.checklist label { display: flex; gap: 0.7rem; align-items: flex-start; padding: 0.6rem 0.9rem; border: 1px solid var(--line); border-radius: var(--radius-sm); cursor: pointer; background: var(--panel); }
.checklist input { margin-top: 0.35rem; width: 1.2rem; height: 1.2rem; accent-color: var(--safe); flex: 0 0 auto; }
.checklist label:has(input:checked) { border-color: var(--safe); background: rgba(47,230,209,0.08); }
.checklist label:has(input:checked) span { text-decoration: line-through; color: var(--text-2); }
.checklist--static li { padding: 0.2rem 0 0.2rem 1.6em; position: relative; }
.checklist--static li::before { content: '✓'; position: absolute; left: 0; color: var(--safe); font-weight: 700; }
.checklist-block { margin-bottom: var(--space-3); }

/* Badge */
.badge-block { display: grid; grid-template-columns: auto 1fr; gap: var(--space-2); align-items: center; background: linear-gradient(135deg, rgba(47,230,209,0.16), rgba(91,124,250,0.12)); border: 1px solid rgba(47,230,209,0.55); border-radius: var(--radius); padding: var(--space-3); margin: var(--space-3) 0; box-shadow: var(--glow-safe); }
.badge-block[hidden] { display: none; }
.badge-block__icon { width: 64px; height: 64px; border-radius: 50%; background: var(--grad); color: var(--accent-ink); display: grid; place-items: center; font-size: 2rem; font-weight: 700; }
.badge-block__title { font-family: var(--font-head); font-size: 1.3rem; font-weight: 700; margin-bottom: 0.2rem; }
.badge-block p { margin-bottom: 0.4rem; }

/* Lesson nav */
.lesson-nav { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2); margin-top: var(--space-4); }
.lesson-nav a { display: grid; gap: 0.2rem; padding: var(--space-2) var(--space-3); background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; color: var(--text); font-family: var(--font-head); font-weight: 700; }
.lesson-nav a:hover { border-color: var(--safe); }
.lesson-nav__next { text-align: right; }
.related__list { padding-left: 1.2em; }
.glossary-block { margin-top: var(--space-4); }
@media (max-width: 560px) { .lesson-nav { grid-template-columns: 1fr; } }

/* ---- practice ---- */
/* Practice tools */
.practice-intro { display: grid; grid-template-columns: 1fr auto; gap: var(--space-3); align-items: center; }
.practice-stage { background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: var(--space-3); margin-top: var(--space-2); }
.practice-stage__head { display: flex; justify-content: space-between; align-items: center; gap: var(--space-2); flex-wrap: wrap; margin-bottom: var(--space-2); font-family: var(--font-ui); font-size: 0.9rem; color: var(--text-2); }
.practice-item { display: grid; gap: var(--space-2); }
.practice-item[hidden] { display: none; }
.practice-item .sample { font-size: 1.05rem; max-width: 520px; }
.practice-actions { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.practice-feedback { border-radius: var(--radius-sm); padding: var(--space-2) var(--space-3); border: 1px solid var(--line-strong); background: var(--bg); }
.practice-feedback[hidden] { display: none; }
.practice-feedback.is-correct { border-color: var(--safe); }
.practice-feedback.is-wrong { border-color: var(--warn); }
.practice-feedback__title { font-family: var(--font-head); font-weight: 700; font-size: 1.15rem; margin-bottom: 0.4rem; }
.practice-feedback ul { padding-left: 1.2em; margin-bottom: 0.5rem; }
.practice-summary { text-align: center; padding: var(--space-3); }
.practice-summary[hidden] { display: none; }
.practice-summary__score { font-family: var(--font-head); font-size: 2.4rem; font-weight: 700; color: var(--safe); margin-bottom: 0.3rem; }
.cue-list { padding-left: 1.2em; }

/* Link check */
.urlbox { font-family: ui-monospace, 'Cascadia Mono', Consolas, monospace; font-size: clamp(0.95rem, 0.8rem + 0.6vw, 1.2rem); word-break: break-all; background: var(--bg); border: 1px solid var(--line-strong); border-radius: var(--radius-sm); padding: 0.9rem 1rem; }
.urlbox .u-scheme { color: var(--muted); }
.urlbox .u-sub { color: var(--text-2); }
.urlbox .u-host { color: var(--safe); font-weight: 700; background: rgba(47,230,209,0.12); border-radius: 4px; padding: 0 0.15em; }
.urlbox .u-path { color: var(--muted); }
.link-rules { display: grid; gap: 0.6rem; margin-top: var(--space-2); }
.link-rules li { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0.6rem 0.9rem; list-style: none; }
.link-tool { margin-top: var(--space-3); }
.link-tool__input { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.link-tool__input input { flex: 1; min-width: 240px; }
.link-tool__result { margin-top: var(--space-2); }
.link-tool__result ul { padding-left: 1.2em; }
.link-tool__result li.is-warn { color: var(--warn); }
.link-tool__result li.is-danger { color: var(--danger); }
.link-tool__result li.is-ok { color: var(--safe); }

/* Password meter */
.pw-tool { background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: var(--space-3); max-width: 720px; }
.pw-tool__row { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }
.pw-tool__row input { flex: 1; min-width: 220px; font-family: ui-monospace, monospace; }
.pw-meter { height: 12px; border-radius: 6px; background: rgba(255,255,255,0.08); margin: var(--space-2) 0 0.6rem; overflow: hidden; }
.pw-meter__bar { height: 100%; width: 0; border-radius: 6px; background: var(--danger); transition: width var(--dur) var(--ease), background var(--dur); }
.pw-meter__bar[data-level="2"] { background: var(--warn); }
.pw-meter__bar[data-level="3"] { background: #b8e04d; }
.pw-meter__bar[data-level="4"] { background: var(--safe); }
.pw-verdict { font-family: var(--font-head); font-weight: 700; font-size: 1.2rem; }
.pw-tips { padding-left: 1.2em; }
.pw-tips li.is-ok { color: var(--safe); }
.pw-tips li.is-bad { color: var(--warn); }
.pw-passphrase { background: var(--bg); border: 1px dashed var(--line-strong); border-radius: var(--radius-sm); padding: var(--space-2); margin-top: var(--space-2); }
.pw-passphrase__out { font-family: var(--font-head); font-size: 1.4rem; font-weight: 700; color: var(--safe); word-break: break-word; }

/* Deepfake check */
.df-item { display: grid; gap: var(--space-2); }
.df-item__media { background: var(--bg); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: var(--space-2); }
.df-item__media p { margin-bottom: 0.3rem; }
.df-transcript { border-left: 3px solid var(--accent); padding-left: 1rem; font-style: italic; color: var(--text-2); }

/* Poster */
.poster-canvas { display: none; }

/* ---- motion ---- */
/* Motion — all optional. Disabled by prefers-reduced-motion or html[data-motion="reduce"]. */
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
@keyframes ring-spin { to { transform: translate(-50%, -50%) rotate(360deg); } }
@keyframes ring-pulse { 0%, 100% { opacity: 0.35; } 50% { opacity: 0.8; } }
@keyframes pop-in { from { opacity: 0; transform: translateY(12px) scale(0.98); } to { opacity: 1; transform: none; } }
@keyframes badge-pop { 0% { transform: scale(0.6); opacity: 0; } 60% { transform: scale(1.08); opacity: 1; } 100% { transform: scale(1); } }
@keyframes incoming { 0%, 20% { opacity: 0; transform: translateY(8px); } 30%, 70% { opacity: 1; transform: none; } 80%, 100% { opacity: 0; transform: translateY(-6px); } }
@keyframes incoming-static { 0%, 20% { opacity: 0.35; } 30%, 70% { opacity: 1; box-shadow: var(--glow-safe); } 80%, 100% { opacity: 0.35; } }
@keyframes shimmer { to { background-position: 200% 0; } }
@keyframes shake { 0%, 100% { transform: translateX(0); } 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }

html:not([data-motion="reduce"]) .mascot--hero { animation: float 4.5s ease-in-out infinite; }
html:not([data-motion="reduce"]) .hero__ring--1 { animation: ring-pulse 4s ease-in-out infinite; }
html:not([data-motion="reduce"]) .hero__ring--2 { animation: ring-spin 60s linear infinite; }
html:not([data-motion="reduce"]) .hero__incoming { animation: incoming 9s ease-in-out infinite; }
html:not([data-motion="reduce"]) .hero__incoming--sms { animation-delay: 3s; }
html:not([data-motion="reduce"]) .hero__incoming--shield { animation-delay: 6s; }
@media (max-width: 900px) { html:not([data-motion="reduce"]) .hero__incoming { animation-name: incoming-static; } }
html:not([data-motion="reduce"]) .reveal { opacity: 0; transform: translateY(14px); transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease); }
html:not([data-motion="reduce"]) .reveal.is-in { opacity: 1; transform: none; }
html:not([data-motion="reduce"]) .badge-block:not([hidden]) { animation: badge-pop 600ms var(--ease); }
html:not([data-motion="reduce"]) .flip.is-flipped .flip__back { animation: pop-in var(--dur) var(--ease); }
html:not([data-motion="reduce"]) .bubble { animation: pop-in var(--dur) var(--ease); }
html:not([data-motion="reduce"]) .practice-feedback:not([hidden]) { animation: pop-in var(--dur) var(--ease); }
html:not([data-motion="reduce"]) .is-shake { animation: shake 300ms ease-in-out; }
html:not([data-motion="reduce"]) .mascot.is-swapping img { transition: opacity 200ms ease; }
html:not([data-motion="reduce"]) .hero__scene .mascot { transform-style: preserve-3d; transition: transform 300ms var(--ease); }

/* Reduced motion: both OS preference and explicit site toggle */
@media (prefers-reduced-motion: reduce) {
  html:not([data-motion="full"]) *, html:not([data-motion="full"]) *::before, html:not([data-motion="full"]) *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  html:not([data-motion="full"]) .reveal { opacity: 1; transform: none; }
}
html[data-motion="reduce"] *, html[data-motion="reduce"] *::before, html[data-motion="reduce"] *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
html[data-motion="reduce"] { scroll-behavior: auto; }
html[data-motion="reduce"] .hero__incoming { opacity: 1; position: static; display: inline-block; margin: 0.3rem; }
html[data-motion="reduce"] .hero__console { position: static; display: flex; flex-wrap: wrap; justify-content: center; order: 2; }
html[data-motion="reduce"] .hero__ring { display: none; }