/* ==========================================================
   Humanize AI: site styles
   Theme: an editor's desk. Blue pencil for corrections,
   highlighter yellow for flagged phrases.
   ========================================================== */

/* ---------- 1. Design tokens ---------- */

:root {
    --paper: #f5f7fa;
    --sheet: #ffffff;
    --ink: #151c33;
    --muted: #59627c;
    --line: #dbe0ea;
    --pencil: #2443c4;
    --pencil-soft: #e6ebfc;
    --mark: #ffe36b;
    --mark-soft: #fff1b0;
    --mark-ink: #151c33;
    --human: #1d7a52;
    --human-soft: #e2f3ea;
    --mixed: #a76a00;
    --mixed-soft: #fbf0d9;
    --ai: #b8360b;
    --ai-soft: #fbe6dd;
    --shadow: 0 18px 40px -24px rgba(21, 28, 51, 0.35);

    --font-display: "Gloock", Georgia, "Times New Roman", serif;
    --font-body: "Atkinson Hyperlegible", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --font-hand: "Caveat", "Segoe Print", "Bradley Hand", cursive;
    --font-mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;

    --radius: 8px;
    --gutter: 16px;
    --max: 1120px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --paper: #0f1320;
        --sheet: #171c2c;
        --ink: #e7eaf3;
        --muted: #a2aac2;
        --line: #2b3248;
        --pencil: #8fa5ff;
        --pencil-soft: #222b4d;
        --mark: #6b5a12;
        --mark-soft: #4a3f12;
        --mark-ink: #fff6cf;
        --human: #5fd1a0;
        --human-soft: #14322a;
        --mixed: #f0b54a;
        --mixed-soft: #352a12;
        --ai: #ff8a62;
        --ai-soft: #3a1d14;
        --shadow: 0 18px 40px -24px rgba(0, 0, 0, 0.6);
        color-scheme: dark;
    }
}

/* ---------- 2. Base ---------- */

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.65;
}

img,
svg {
    max-width: 100%;
    height: auto;
}

/* Elements hidden with the "hidden" attribute stay hidden, even if a class sets display. */
[hidden] {
    display: none !important;
}

a {
    color: var(--pencil);
    text-underline-offset: 3px;
}

a:hover {
    text-decoration-thickness: 2px;
}

:focus-visible {
    outline: 2px solid var(--pencil);
    outline-offset: 2px;
    border-radius: 3px;
}

h1,
h2,
h3,
.h3 {
    margin: 0;
    font-family: var(--font-display);
    font-weight: 400;
    line-height: 1.15;
    text-wrap: balance;
}

h1 {
    font-size: clamp(2.2rem, 5vw, 3.6rem);
}

h2 {
    font-size: clamp(1.7rem, 3.4vw, 2.4rem);
}

h3,
.h3 {
    font-size: 1.3rem;
}

p {
    margin: 0;
}

.wrap {
    max-width: var(--max);
    margin: 0 auto;
    padding-left: max(var(--gutter), env(safe-area-inset-left, 0px));
    padding-right: max(var(--gutter), env(safe-area-inset-right, 0px));
}

.skip-link {
    position: absolute;
    left: 12px;
    top: -60px;
    padding: 8px 14px;
    background: var(--ink);
    color: var(--paper);
    border-radius: 6px;
    z-index: 20;
}

.skip-link:focus {
    top: 12px;
}

.eyebrow {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
}

.lede {
    max-width: 62ch;
    font-size: 1.14rem;
    color: var(--muted);
}

.fine {
    margin-top: 16px;
    font-size: 0.84rem;
    line-height: 1.55;
    color: var(--muted);
}

/* ---------- 3. Buttons and chips ---------- */

.btns {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.btn {
    display: inline-block;
    padding: 12px 20px;
    border: 1.5px solid var(--ink);
    border-radius: 6px;
    background: var(--ink);
    color: var(--paper);
    font: inherit;
    font-size: 1rem;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

.btn:hover {
    background: var(--pencil);
    border-color: var(--pencil);
    color: var(--sheet);
}

.btn--ghost {
    background: transparent;
    color: var(--ink);
}

.btn--small {
    padding: 8px 14px;
    font-size: 0.9rem;
}

.btn[disabled] {
    opacity: 0.6;
    cursor: wait;
}

.chip {
    padding: 6px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--paper);
    color: var(--ink);
    font: inherit;
    font-size: 0.85rem;
    cursor: pointer;
}

.chip:hover {
    border-color: var(--pencil);
    color: var(--pencil);
}

/* ---------- 4. Header and footer ---------- */

.site-header__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px 24px;
    padding-block: 20px;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.45rem;
    color: var(--ink);
    text-decoration: none;
}

.logo span {
    color: var(--pencil);
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 22px;
}

.site-nav a {
    color: var(--ink);
    font-size: 0.95rem;
    text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
    color: var(--pencil);
    text-decoration: underline;
}

.site-footer {
    margin-top: 72px;
    padding-block: 48px 32px;
    border-top: 1px solid var(--line);
    font-size: 0.92rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.3fr 1.2fr 1fr 1fr;
    gap: 32px;
}

.footer-grid > * {
    min-width: 0;
}

.footer-brand p {
    margin-top: 10px;
    max-width: 34ch;
    color: var(--muted);
}

.footer-col h2 {
    margin-bottom: 10px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
}

.footer-col h2:not(:first-child) {
    margin-top: 22px;
}

.footer-col ul {
    display: grid;
    gap: 6px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.footer-col a {
    color: var(--ink);
    text-decoration: none;
}

.footer-col a:hover {
    color: var(--pencil);
    text-decoration: underline;
}

.footer-note {
    margin-top: 36px;
    padding-top: 20px;
    border-top: 1px solid var(--line);
    font-size: 0.82rem;
    color: var(--muted);
}

/* ---------- 5. Sections ---------- */

.section {
    padding-block: 64px;
    border-top: 1px solid var(--line);
}

.section--tight {
    padding-block: 40px;
    border-top: 0;
}

.section-head {
    display: grid;
    gap: 12px;
    margin-bottom: 32px;
}

.section-foot {
    margin-top: 28px;
}

.page-head {
    display: grid;
    gap: 14px;
    padding-block: 12px 36px;
}

/* ---------- 6. Home hero ---------- */

.hero {
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    align-items: center;
    gap: 56px;
    padding-block: 40px 72px;
}

.hero > * {
    min-width: 0;
}

.hero__copy {
    display: grid;
    gap: 22px;
}

.manuscript {
    position: relative;
    margin: 0;
    padding: 30px 28px 24px;
    border: 1px solid var(--line);
    background: var(--sheet);
    box-shadow: var(--shadow);
    font-size: 1.05rem;
    line-height: 2.05;
}

.manuscript del {
    color: var(--muted);
    text-decoration: line-through;
    text-decoration-color: var(--pencil);
    text-decoration-thickness: 2px;
}

.manuscript ins {
    font-family: var(--font-hand);
    font-size: 1.45rem;
    line-height: 1;
    color: var(--pencil);
    text-decoration: none;
}

.manuscript__tag {
    position: absolute;
    top: -12px;
    left: 22px;
    padding: 3px 9px;
    border-radius: 3px;
    background: var(--pencil);
    color: var(--sheet);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.manuscript__note {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px dashed var(--line);
    font-family: var(--font-hand);
    font-size: 1.3rem;
    line-height: 1.2;
    color: var(--pencil);
}

/* ---------- 7. Ad slots ---------- */

.ad-slot {
    display: grid;
    justify-items: center;
    gap: 6px;
    margin-bottom: 24px;
    padding: 10px 0;
    overflow: hidden;
}

.ad-label {
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
}

/* ---------- 8. Writing checker ---------- */

.panel {
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--sheet);
}

.checker__grid {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    align-items: start;
    gap: 28px;
}

.checker__grid > * {
    min-width: 0;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
}

.checker__input label {
    display: block;
    margin-bottom: 6px;
}

.checker textarea {
    width: 100%;
    min-height: 280px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--paper);
    color: var(--ink);
    font: inherit;
    font-size: 1rem;
    line-height: 1.6;
    resize: vertical;
}

.checker__run {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 12px;
}

.count {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}

.verdict {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 18px;
    padding: 18px;
    border-radius: var(--radius);
    background: var(--paper);
}

.verdict--human {
    background: var(--human-soft);
}

.verdict--mixed {
    background: var(--mixed-soft);
}

.verdict--ai {
    background: var(--ai-soft);
}

.verdict__score {
    font-family: var(--font-display);
    font-size: 3.2rem;
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.verdict__label {
    font-size: 1.1rem;
    font-weight: 700;
}

.verdict__sub {
    font-size: 0.9rem;
    color: var(--muted);
}

.verdict--human .verdict__score,
.verdict--human .verdict__label {
    color: var(--human);
}

.verdict--mixed .verdict__score,
.verdict--mixed .verdict__label {
    color: var(--mixed);
}

.verdict--ai .verdict__score,
.verdict--ai .verdict__label {
    color: var(--ai);
}

.scale {
    position: relative;
    height: 8px;
    margin: 6px 0 4px;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--human) 0 38%, var(--mixed) 38% 62%, var(--ai) 62% 100%);
    opacity: 0.85;
}

.scale i {
    position: absolute;
    top: -5px;
    left: 0;
    width: 4px;
    height: 18px;
    border-radius: 2px;
    background: var(--ink);
    transform: translateX(-50%);
    transition: left 0.4s;
}

.scale-labels {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
}

.signals {
    display: grid;
    gap: 14px;
    margin: 22px 0 0;
    padding: 0;
    list-style: none;
}

.signal {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 2px 12px;
}

.signal b {
    font-size: 0.95rem;
}

.signal__value {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted);
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.signal__meter {
    grid-column: 1 / -1;
    height: 6px;
    margin-top: 4px;
    overflow: hidden;
    border-radius: 3px;
    background: var(--line);
}

.signal__meter span {
    display: block;
    height: 100%;
    border-radius: 3px;
    transition: width 0.4s;
}

.signal p {
    grid-column: 1 / -1;
    margin-top: 4px;
    font-size: 0.86rem;
    line-height: 1.45;
    color: var(--muted);
}

.signal p strong {
    color: var(--ink);
}

.readback {
    margin-top: 28px;
}

.readback__head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
}

.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 14px;
    font-size: 0.8rem;
    color: var(--muted);
}

.legend span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.swatch {
    display: inline-block;
    width: 14px;
    height: 10px;
    border-radius: 2px;
}

.swatch--bot {
    background: var(--ai);
}

.swatch--strong {
    background: var(--mark);
}

.swatch--med {
    background: var(--mark-soft);
}

.swatch--weak {
    height: 8px;
    border-bottom: 2px dotted var(--mixed);
    border-radius: 0;
}

.swatch--trans {
    background: var(--pencil-soft);
    border-bottom: 2px solid var(--pencil);
}

.swatch--dash {
    background: var(--ai-soft);
    border: 1px solid var(--ai);
}

.marked {
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--sheet);
    line-height: 1.9;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.marked mark {
    padding: 1px 2px;
    border-radius: 2px;
    background: none;
    color: inherit;
}

.marked .tell-bot {
    background: var(--ai);
    color: var(--sheet);
    font-weight: 700;
}

.marked .tell-strong {
    background: var(--mark);
    color: var(--mark-ink);
}

.marked .tell-med {
    background: var(--mark-soft);
    color: var(--mark-ink);
}

.marked .tell-weak {
    border-bottom: 2px dotted var(--mixed);
    border-radius: 0;
}

.marked .trans,
.marked .formula {
    text-decoration: underline wavy var(--pencil);
    text-decoration-thickness: 1.5px;
    text-underline-offset: 4px;
}

.marked .formula {
    background: var(--pencil-soft);
}

.marked .dash {
    padding: 0 2px;
    background: var(--ai-soft);
    color: var(--ai);
    font-weight: 700;
}

.marked [title] {
    cursor: help;
}

.insights {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 28px;
    margin-top: 28px;
}

.insights > * {
    min-width: 0;
}

.insight__note {
    margin: 6px 0 16px;
    font-size: 0.86rem;
    color: var(--muted);
}

.rhythm {
    position: relative;
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 150px;
    padding-top: 6px;
    border-bottom: 1px solid var(--line);
    overflow-x: auto;
    background-image: linear-gradient(var(--line) 1px, transparent 1px);
    background-size: 100% 25%;
    background-position: 0 6px;
}

.rhythm__bar {
    position: relative;
    flex: 1 0 10px;
    max-width: 34px;
    border-radius: 2px 2px 0 0;
    background: var(--pencil);
    opacity: 0.8;
}

.rhythm__bar:hover {
    opacity: 1;
}

.rhythm__bar--long {
    background: var(--ai);
}

.rhythm__avg {
    position: absolute;
    left: 0;
    right: 0;
    border-top: 1.5px dashed var(--ink);
    pointer-events: none;
}

.rhythm__avg span {
    position: absolute;
    right: 0;
    top: -20px;
    padding: 0 4px;
    background: var(--sheet);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--ink);
}

.rhythm__axis {
    display: flex;
    justify-content: space-between;
    margin-top: 6px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--muted);
}

.keywords {
    display: grid;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: kw;
}

.keyword {
    display: grid;
    grid-template-columns: 1.6em minmax(0, 1fr) 2.5em;
    align-items: center;
    gap: 10px;
    font-size: 0.92rem;
    counter-increment: kw;
}

.keyword::before {
    content: counter(kw);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--muted);
}

.keyword__bar {
    position: relative;
    height: 24px;
    border-radius: 4px;
    background: var(--paper);
    overflow: hidden;
}

.keyword__bar span {
    position: absolute;
    inset: 0 auto 0 0;
    border-radius: 4px;
    background: var(--pencil-soft);
}

.keyword__bar b {
    position: relative;
    padding-left: 8px;
    font-weight: 700;
    line-height: 24px;
}

.keyword__count {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.keywords__empty {
    font-size: 0.9rem;
    color: var(--muted);
}

/* ---------- 9. Home: modules, picks, beliefs ---------- */

.module-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.module-row {
    display: grid;
    grid-template-columns: 56px minmax(0, 1fr) auto;
    align-items: baseline;
    gap: 16px;
    padding-block: 18px;
    border-top: 1px solid var(--line);
}

.module-row__num {
    font-family: var(--font-display);
    font-size: 2rem;
    line-height: 1;
    color: var(--pencil);
}

.module-row h3 a {
    color: var(--ink);
    text-decoration: none;
}

.module-row h3 a:hover {
    color: var(--pencil);
    text-decoration: underline;
}

.module-row p {
    margin-top: 4px;
    color: var(--muted);
}

.module-row__meta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted);
    white-space: nowrap;
}

.pick-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.pick {
    display: grid;
    gap: 10px;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--sheet);
    color: var(--ink);
    text-decoration: none;
}

.pick:hover {
    border-color: var(--pencil);
}

.pick__q {
    font-family: var(--font-display);
    font-size: 1.3rem;
    line-height: 1.25;
}

.pick__a {
    font-size: 0.9rem;
    color: var(--pencil);
}

.beliefs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
}

.beliefs > div {
    display: grid;
    align-content: start;
    gap: 8px;
}

.beliefs p {
    font-size: 0.96rem;
    color: var(--muted);
}

/* ---------- 10. Breadcrumbs ---------- */

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin: 8px 0 20px;
    padding: 0;
    list-style: none;
    font-size: 0.85rem;
    color: var(--muted);
}

.breadcrumbs li:not(:last-child)::after {
    content: "/";
    margin-left: 6px;
    color: var(--line);
}

.breadcrumbs a {
    color: var(--muted);
}

.breadcrumbs a:hover {
    color: var(--pencil);
}

/* ---------- 11. Course overview ---------- */

.facts {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 40px;
    margin: 8px 0 0;
}

.facts dt {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
}

.facts dd {
    margin: 0;
    font-family: var(--font-display);
    font-size: 1.6rem;
}

.curriculum {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 48px;
}

.curriculum__module {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 16px;
    padding-block: 26px;
    border-top: 1px solid var(--line);
}

.curriculum__num {
    font-family: var(--font-display);
    font-size: 2.2rem;
    line-height: 1;
    color: var(--pencil);
}

.curriculum__body h2 {
    font-size: 1.35rem;
}

.curriculum__body h2 a {
    color: var(--ink);
    text-decoration: none;
}

.curriculum__body h2 a:hover {
    color: var(--pencil);
    text-decoration: underline;
}

.curriculum__body > p {
    margin-top: 6px;
    font-size: 0.95rem;
    color: var(--muted);
}

.lesson-links {
    display: grid;
    gap: 6px;
    margin: 12px 0 0;
    padding: 0;
    list-style: none;
}

.lesson-links li {
    display: flex;
    align-items: baseline;
    gap: 10px;
    font-size: 0.95rem;
}

.lesson-links__num {
    min-width: 2.2em;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--muted);
}

.lesson-links a {
    color: var(--ink);
}

.lesson-links a:hover {
    color: var(--pencil);
}

/* ---------- 12. Module page ---------- */

.module-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: 48px;
}

.lesson-cards {
    display: grid;
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.lesson-card {
    display: grid;
    gap: 4px;
    padding: 18px 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--sheet);
    color: var(--ink);
    text-decoration: none;
}

.lesson-card:hover {
    border-color: var(--pencil);
}

.lesson-card__num {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--pencil);
}

.lesson-card__title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    line-height: 1.25;
}

.lesson-card__desc {
    font-size: 0.9rem;
    color: var(--muted);
}

/* ---------- 13. Lesson page ---------- */

.lesson-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    align-items: start;
    gap: 56px;
}

.lesson {
    max-width: 72ch;
}

.lesson__head {
    display: grid;
    gap: 12px;
    margin-bottom: 28px;
}

.lesson__meta {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted);
}

.toc {
    margin-bottom: 32px;
    padding: 18px 20px;
    border-left: 3px solid var(--pencil);
    background: var(--sheet);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.toc__title {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
}

.toc ol {
    display: grid;
    gap: 4px;
    margin: 8px 0 0;
    padding-left: 1.3em;
}

.lesson-side {
    position: sticky;
    top: 24px;
    display: grid;
    gap: 20px;
}

.side-box {
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--sheet);
}

.side-box__module {
    display: block;
    margin-bottom: 10px;
    font-weight: 700;
    color: var(--ink);
    text-decoration: none;
}

a.side-box__module:hover {
    color: var(--pencil);
}

.side-list {
    display: grid;
    gap: 2px;
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 0.9rem;
}

.side-list a {
    display: grid;
    grid-template-columns: 2.4em minmax(0, 1fr);
    gap: 4px;
    padding: 6px 8px;
    border-radius: 6px;
    color: var(--ink);
    text-decoration: none;
}

.side-list a span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted);
    padding-top: 2px;
}

.side-list a:hover {
    background: var(--paper);
    color: var(--pencil);
}

.side-list a[aria-current] {
    background: var(--pencil-soft);
    color: var(--pencil);
    font-weight: 700;
}

.side-list--compact {
    font-size: 0.85rem;
}

.try-it {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 40px;
    padding: 20px 22px;
    border: 1.5px dashed var(--pencil);
    border-radius: var(--radius);
}

.try-it p {
    margin-top: 4px;
    font-size: 0.92rem;
    color: var(--muted);
}

.related {
    margin-top: 40px;
}

.related ul {
    display: grid;
    gap: 8px;
    margin: 12px 0 0;
    padding: 0;
    list-style: none;
}

.related a {
    display: flex;
    gap: 10px;
    color: var(--ink);
}

.related a:hover {
    color: var(--pencil);
}

.related__num {
    min-width: 2.4em;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--muted);
    padding-top: 2px;
}

.pager {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 40px;
}

.pager__link {
    display: grid;
    gap: 4px;
    padding: 16px 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--sheet);
    color: var(--ink);
    text-decoration: none;
}

.pager__link:hover {
    border-color: var(--pencil);
}

.pager__link--next {
    text-align: right;
}

.pager__dir {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
}

.pager__title {
    font-weight: 700;
}

/* ---------- 14. Article typography (.prose) ---------- */

.prose {
    display: grid;
    gap: 18px;
    min-width: 0;
}

.prose > * {
    min-width: 0;
}

.prose h2 {
    margin-top: 28px;
    font-size: 1.75rem;
    scroll-margin-top: 20px;
}

.prose h3 {
    margin-top: 14px;
    font-size: 1.3rem;
}

.prose ul,
.prose ol {
    display: grid;
    gap: 8px;
    margin: 0;
    padding-left: 1.4em;
}

.prose li::marker {
    color: var(--pencil);
}

.prose strong {
    font-weight: 700;
}

.prose code {
    padding: 1px 5px;
    border-radius: 4px;
    background: var(--pencil-soft);
    font-family: var(--font-mono);
    font-size: 0.86em;
}

.prose blockquote {
    margin: 0;
    padding: 4px 0 4px 18px;
    border-left: 3px solid var(--line);
    color: var(--muted);
    font-style: italic;
}

.callout {
    padding: 16px 18px;
    border-left: 3px solid var(--pencil);
    border-radius: 0 6px 6px 0;
    background: var(--pencil-soft);
    font-size: 0.96rem;
}

.callout--warn {
    border-left-color: var(--mixed);
    background: var(--mixed-soft);
}

.prompt {
    position: relative;
    padding: 18px 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--sheet);
    font-family: var(--font-mono);
    font-size: 0.86rem;
    line-height: 1.6;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.prompt::before {
    content: "Prompt";
    display: block;
    margin-bottom: 8px;
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--pencil);
}

.prompt__copy {
    position: absolute;
    top: 10px;
    right: 10px;
    font-family: var(--font-body);
}

.compare {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.compare > div {
    min-width: 0;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--sheet);
    font-size: 0.96rem;
}

.compare__label {
    display: block;
    margin-bottom: 8px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.compare__before .compare__label {
    color: var(--ai);
}

.compare__after .compare__label {
    color: var(--human);
}

.exercise {
    display: grid;
    gap: 10px;
    padding: 18px 20px;
    border: 1.5px dashed var(--pencil);
    border-radius: var(--radius);
}

.exercise__title {
    font-family: var(--font-hand);
    font-size: 1.6rem;
    line-height: 1;
    color: var(--pencil);
}

.steps {
    counter-reset: step;
    list-style: none;
    padding-left: 0 !important;
}

.steps > li {
    position: relative;
    padding-left: 2.6em;
    counter-increment: step;
}

.steps > li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    display: grid;
    place-items: center;
    width: 1.8em;
    height: 1.8em;
    border-radius: 50%;
    background: var(--pencil-soft);
    color: var(--pencil);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
}

/* Tables */

.table-wrap {
    width: 100%;
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--sheet);
}

.table-wrap + .prose,
.prose + .table-wrap {
    margin-top: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.93rem;
}

th,
td {
    padding: 11px 14px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

th {
    background: var(--paper);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
}

tbody tr:last-child td {
    border-bottom: 0;
}

td.num {
    font-family: var(--font-mono);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

/* Charts and diagrams drawn as inline SVG */

.figure {
    margin: 0;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--sheet);
}

.figure__scroll {
    overflow-x: auto;
}

.figure svg {
    display: block;
    width: 100%;
    min-width: 480px;
    height: auto;
}

.figure figcaption {
    margin-top: 10px;
    font-size: 0.86rem;
    color: var(--muted);
}

.c-text {
    fill: var(--ink);
    font-family: var(--font-body);
    font-size: 13px;
}

.c-muted {
    fill: var(--muted);
    font-family: var(--font-mono);
    font-size: 11px;
}

.c-grid {
    stroke: var(--line);
    stroke-width: 1;
}

.c-bar {
    fill: var(--pencil);
}

.c-bar--soft {
    fill: var(--pencil-soft);
    stroke: var(--pencil);
    stroke-width: 1;
}

.c-bar--ai {
    fill: var(--ai);
}

.c-bar--human {
    fill: var(--human);
}

.c-box {
    fill: var(--paper);
    stroke: var(--line);
    stroke-width: 1.5;
}

.c-box--accent {
    fill: var(--pencil-soft);
    stroke: var(--pencil);
}

.c-line {
    fill: none;
    stroke: var(--muted);
    stroke-width: 1.5;
}

.c-arrow {
    fill: var(--muted);
}

/* ---------- 15. Tools, pages, glossary, contact, 404 ---------- */

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.tool-card {
    display: grid;
    gap: 8px;
    height: 100%;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--sheet);
    color: var(--ink);
    text-decoration: none;
}

.tool-card:hover {
    border-color: var(--pencil);
}

.tool-card__name {
    font-family: var(--font-display);
    font-size: 1.4rem;
}

.tool-card__desc {
    font-size: 0.94rem;
    color: var(--muted);
}

.tool-card__go {
    font-weight: 700;
    color: var(--pencil);
}

.page-article {
    max-width: 72ch;
}

.page-article--wide {
    max-width: 80ch;
}

.contact-card {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 16px;
    margin-bottom: 28px;
    padding: 18px 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--sheet);
}

.contact-card__email {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    user-select: all;
}

.az {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 14px;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--line);
    font-size: 0.9rem;
}

.glossary dl {
    display: grid;
    gap: 0;
    margin: 0;
}

.glossary dt {
    padding-top: 22px;
    border-top: 1px solid var(--line);
    font-family: var(--font-display);
    font-size: 1.35rem;
    scroll-margin-top: 20px;
}

.glossary dd {
    margin: 6px 0 22px;
}

.glossary dd + dt {
    margin-top: 0;
}

.not-found {
    display: grid;
    gap: 16px;
    padding-block: 60px 20px;
}

.not-found__links {
    display: grid;
    gap: 8px;
    padding-left: 1.2em;
}

/* ---------- 16. Responsive ---------- */

@media (max-width: 960px) {
    .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .lesson-layout {
        grid-template-columns: minmax(0, 1fr);
        gap: 40px;
    }

    .lesson-side {
        position: static;
    }
}

@media (max-width: 860px) {
    .hero,
    .checker__grid,
    .insights,
    .module-layout {
        grid-template-columns: minmax(0, 1fr);
        gap: 32px;
    }

    .curriculum,
    .beliefs {
        grid-template-columns: minmax(0, 1fr);
    }

    .section {
        padding-block: 48px;
    }
}

@media (max-width: 560px) {
    body {
        font-size: 16px;
    }

    .pick-grid,
    .compare,
    .pager,
    .footer-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .pager__link--next {
        text-align: left;
    }

    .module-row {
        grid-template-columns: 40px minmax(0, 1fr);
    }

    .module-row__meta {
        display: none;
    }

    .curriculum__module {
        grid-template-columns: 40px minmax(0, 1fr);
    }

    .manuscript {
        padding: 26px 18px 20px;
    }

    .panel {
        padding: 18px;
    }

    .verdict__score {
        font-size: 2.6rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    * {
        transition: none !important;
    }
}

/* ---------- 17. Inline examples ---------- */

.prose q.ex,
td q.ex {
    font-style: italic;
    color: var(--ink);
}

.prose blockquote strong {
    font-style: normal;
    color: var(--ink);
}

.section--tight > h2 {
    margin-bottom: 18px;
}

@media (max-width: 560px) {
    .signal {
        grid-template-columns: minmax(0, 1fr);
    }

    .signal__value {
        text-align: left;
    }
}

/* ---------- 18. Bot protection ---------- */

.hp {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.checker__input {
    position: relative;
}

.checker__challenge:not(:empty) {
    margin-top: 12px;
}

/* ---------- 19. Lesson feedback ---------- */

.feedback {
    display: grid;
    gap: 12px;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
}

.feedback__q {
    font-size: 1.2rem;
}

.feedback__buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.feedback__more {
    display: grid;
    gap: 8px;
    max-width: 520px;
    position: relative;
}

.feedback__more label {
    font-size: 0.92rem;
    color: var(--muted);
}

.feedback__more textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--sheet);
    color: var(--ink);
    font: inherit;
    font-size: 0.95rem;
    resize: vertical;
}

.feedback__more .btn {
    justify-self: start;
}

.feedback__thanks {
    color: var(--human);
    font-weight: 700;
}

/* ---------- 20. Announcement bar ---------- */

.announcement {
    background: var(--pencil);
    color: var(--sheet);
    font-size: 0.92rem;
}

.announcement--mark {
    background: var(--mark);
    color: var(--mark-ink);
}

.announcement--ink {
    background: var(--ink);
    color: var(--paper);
}

.announcement__inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px 14px;
    flex-wrap: wrap;
    padding-block: 9px;
    text-align: center;
}

.announcement a {
    color: inherit;
    font-weight: 700;
}

.announcement__close {
    padding: 0 6px;
    border: 0;
    background: none;
    color: inherit;
    font: inherit;
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
    opacity: 0.8;
}

.announcement__close:hover {
    opacity: 1;
}

/* ---------- 21. Score report ---------- */

.report {
    margin-top: 16px;
    font-size: 0.88rem;
}

.report__open {
    padding: 0;
    border: 0;
    background: none;
    color: var(--pencil);
    font: inherit;
    text-decoration: underline;
    text-underline-offset: 3px;
    cursor: pointer;
}

.report__form {
    display: grid;
    gap: 10px;
    margin-top: 10px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--paper);
    position: relative;
}

.report__form fieldset {
    display: grid;
    gap: 6px;
    margin: 0;
    padding: 0;
    border: 0;
}

.report__form legend {
    margin-bottom: 4px;
    font-weight: 700;
}

.report__form label {
    display: flex;
    gap: 8px;
    align-items: baseline;
}

.report__form textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--sheet);
    color: var(--ink);
    font: inherit;
    font-size: 0.9rem;
}

.report__form .btn {
    justify-self: start;
}

.report__done {
    margin-top: 8px;
    color: var(--human);
    font-weight: 700;
}

/* ---------- 22. Word counter ---------- */

.counter {
    display: grid;
    gap: 24px;
}

.toolbar__spacer {
    flex: 1;
}

.counter textarea {
    width: 100%;
    min-height: 240px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--paper);
    color: var(--ink);
    font: inherit;
    font-size: 1rem;
    line-height: 1.6;
    resize: vertical;
}

.counter__totals {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.total {
    display: grid;
    gap: 2px;
    padding: 18px 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--sheet);
}

.total:first-child {
    border-color: var(--pencil);
    background: var(--pencil-soft);
}

.total__value {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 2.8rem);
    line-height: 1.05;
    font-variant-numeric: tabular-nums;
}

.total__label {
    font-size: 0.92rem;
    color: var(--muted);
}

.total__label small {
    font-size: 0.82rem;
}

.social__head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px 16px;
    margin-bottom: 14px;
}

.social__summary {
    padding: 3px 12px;
    border-radius: 999px;
    background: var(--human-soft);
    color: var(--human);
    font-size: 0.86rem;
    font-weight: 700;
}

.social__summary.is-over {
    background: var(--ai-soft);
    color: var(--ai);
}

.social__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.limit {
    display: grid;
    gap: 6px;
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--sheet);
}

.limit__head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
}

.limit__platform {
    font-weight: 700;
}

.limit__field {
    font-size: 0.82rem;
    color: var(--muted);
}

.limit__count {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-variant-numeric: tabular-nums;
}

.limit__bar {
    height: 6px;
    border-radius: 3px;
    background: var(--line);
    overflow: hidden;
}

.limit__bar span {
    display: block;
    width: 0;
    height: 100%;
    border-radius: 3px;
    background: var(--human);
    transition: width 0.2s;
}

.limit__status {
    font-size: 0.84rem;
    color: var(--muted);
}

.limit.is-over {
    border-color: var(--ai);
    background: var(--ai-soft);
}

.limit.is-over .limit__bar span {
    background: var(--ai);
}

.limit.is-over .limit__count,
.limit.is-over .limit__status {
    color: var(--ai);
    font-weight: 700;
}

@media (max-width: 560px) {
    .counter__totals {
        grid-template-columns: minmax(0, 1fr);
    }

    .total {
        grid-template-columns: auto 1fr;
        align-items: baseline;
        gap: 12px;
    }
}

/* ---------- 23. AI score label ---------- */

.verdict__number {
    display: grid;
    justify-items: center;
    gap: 2px;
    min-width: 72px;
}

.verdict__unit {
    font-family: var(--font-mono);
    font-size: 0.64rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
    white-space: nowrap;
}

.faq h3 {
    margin-top: 10px;
    font-size: 1.15rem;
}