/* Embedded Institute: dark ink, hairline structure, lime used only for action and "set" states. */

:root {
  --page: #121214;
  --band: #0e0e10;
  --panel: #18181b;
  --panel-2: #1d1d21;
  --line: rgba(255, 255, 255, 0.08);
  --line-soft: rgba(255, 255, 255, 0.05);
  --line-strong: rgba(255, 255, 255, 0.14);
  --fg: #f4f3f1;
  --fg-body: rgba(244, 243, 241, 0.74);
  --fg-muted: rgba(244, 243, 241, 0.6);
  --fg-label: rgba(244, 243, 241, 0.5);
  --accent: #8abf26;
  --accent-hover: #9bd12f;
  --accent-ink: #0e0e10;
  --accent-wash: rgba(138, 191, 38, 0.08);
  --accent-line: rgba(138, 191, 38, 0.38);
  --writing: #e2b93b;
  --masthead-bg: rgba(18, 18, 20, 0.88);
  --bit-hover: #24242a;
  --backdrop: rgba(5, 5, 6, 0.72);

  --sans: "DM Sans", ui-sans-serif, system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --wrap: 76rem;
  --gutter: clamp(1rem, 4vw, 3rem);
  --radius: 10px;
  --radius-sm: 6px;
  color-scheme: dark;
}

/* Theme: dark is the base; light applies for an explicit choice, or when no choice is stored and the OS prefers light. */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --page: #f7f6f2;
    --band: #efeee9;
    --panel: #ffffff;
    --panel-2: #f1f0eb;
    --line: rgba(20, 20, 24, 0.1);
    --line-soft: rgba(20, 20, 24, 0.06);
    --line-strong: rgba(20, 20, 24, 0.2);
    --fg: #16161a;
    --fg-body: rgba(22, 22, 26, 0.8);
    --fg-muted: rgba(22, 22, 26, 0.68);
    --fg-label: rgba(22, 22, 26, 0.58);
    --accent: #4a7309;
    --accent-hover: #3b5c07;
    --accent-ink: #ffffff;
    --accent-wash: rgba(74, 115, 9, 0.08);
    --accent-line: rgba(74, 115, 9, 0.4);
    --writing: #8a6400;
    --masthead-bg: rgba(247, 246, 242, 0.88);
    --bit-hover: #e4e3dd;
    --backdrop: rgba(20, 20, 24, 0.45);
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --page: #f7f6f2;
  --band: #efeee9;
  --panel: #ffffff;
  --panel-2: #f1f0eb;
  --line: rgba(20, 20, 24, 0.1);
  --line-soft: rgba(20, 20, 24, 0.06);
  --line-strong: rgba(20, 20, 24, 0.2);
  --fg: #16161a;
  --fg-body: rgba(22, 22, 26, 0.8);
  --fg-muted: rgba(22, 22, 26, 0.68);
  --fg-label: rgba(22, 22, 26, 0.58);
  --accent: #4a7309;
  --accent-hover: #3b5c07;
  --accent-ink: #ffffff;
  --accent-wash: rgba(74, 115, 9, 0.08);
  --accent-line: rgba(74, 115, 9, 0.4);
  --writing: #8a6400;
  --masthead-bg: rgba(247, 246, 242, 0.88);
  --bit-hover: #e4e3dd;
  --backdrop: rgba(20, 20, 24, 0.45);
  color-scheme: light;
}

.theme-toggle { margin-left: auto; flex: none; display: inline-flex; border: 1px solid var(--line-strong); border-radius: 999px; padding: 2px; gap: 2px; }
.theme-toggle button { all: unset; box-sizing: border-box; cursor: pointer; width: 1.9rem; height: 1.9rem; display: grid; place-items: center; border-radius: 999px; color: var(--fg-muted); }
.theme-toggle button:hover { color: var(--fg); }
.theme-toggle button[aria-pressed="true"] { background: var(--fg); color: var(--page); }
.theme-toggle button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.theme-toggle svg { width: 1rem; height: 1rem; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--page);
  color: var(--fg-body);
  font: 400 1rem/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--fg); text-underline-offset: 0.2em; text-decoration-color: var(--line-strong); }
a:hover { text-decoration-color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }

h1, h2, h3 { color: var(--fg); font-weight: 700; letter-spacing: -0.02em; line-height: 1.1; margin: 0 0 0.5em; text-wrap: balance; }
h1 { font-size: clamp(2.4rem, 1.5rem + 3.6vw, 4.4rem); letter-spacing: -0.025em; line-height: 1.02; }
h2 { font-size: clamp(1.7rem, 1.3rem + 1.6vw, 2.6rem); letter-spacing: -0.022em; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.narrow { max-width: 44rem; }
.sr, .hp { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.hp { left: -10000px; }

.skip { position: absolute; left: 1rem; top: -3rem; background: var(--accent); color: var(--accent-ink); padding: 0.5rem 0.75rem; z-index: 10; }
.skip:focus { top: 1rem; }

.lede { font-size: clamp(1.05rem, 1rem + 0.35vw, 1.25rem); color: var(--fg-muted); max-width: 58ch; }
.fine { font-size: 0.875rem; color: var(--fg-label); max-width: 62ch; }
.eyebrow {
  font: 500 0.75rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--fg-label); margin-bottom: 0.75rem;
}
.eyebrow a { color: inherit; text-decoration: none; }
.eyebrow a:hover { color: var(--fg); }

/* ---------------------------------------------------------------- chrome */

.announce { background: var(--band); border-bottom: 1px solid var(--line); text-align: center; padding: 0.5rem var(--gutter); font-size: 0.875rem; }
.announce a { color: var(--fg); text-decoration: none; }
.announce a:hover { color: var(--accent); }
.tag {
  display: inline-block; margin-right: 0.6rem; padding: 0.1rem 0.4rem;
  font: 500 0.6875rem/1.4 var(--mono); letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); border: 1px solid var(--accent-line); border-radius: 4px;
}

.masthead { position: sticky; top: 0; z-index: 5; background: var(--masthead-bg); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.masthead-row { display: flex; align-items: center; gap: 1.5rem; min-height: 4rem; }
.brand { display: flex; align-items: center; gap: 0.6rem; color: var(--fg); text-decoration: none; font-weight: 700; letter-spacing: -0.01em; }
.brand img { display: block; }
.nav { display: flex; gap: 0.25rem; }
.nav a { color: var(--fg-muted); text-decoration: none; font-size: 0.9375rem; padding: 0.4rem 0.7rem; border-radius: var(--radius-sm); }
.nav a:hover { color: var(--fg); background: var(--line-soft); }
.masthead-cta { flex: none; }
/* Currency: every price is rendered per currency; hide the inactive ones. Default (no attribute) is USD. */
html:not([data-cur="inr"]) .cur-inr, html[data-cur="inr"] .cur-usd { display: none !important; }

.region { display: inline-flex; align-items: center; gap: 0.5rem; margin-top: 0.75rem; font-size: 0.875rem; color: var(--fg-muted); cursor: pointer; user-select: none; }
.region:hover { color: var(--fg); }
.region input { width: 1rem; height: 1rem; margin: 0; accent-color: var(--accent); cursor: pointer; }
.offer .region { flex-basis: 100%; }
#pricing .region { margin: 0 0 0.5rem; }
@media (max-width: 40rem) {
  .nav { display: none; }
  .masthead .brand span { font-size: 0.9375rem; }
  .masthead-cta { padding: 0.45rem 0.7rem; font-size: 0.8125rem; }
}
@media (max-width: 30rem) { .masthead .brand span { display: none; } }

.foot { border-top: 1px solid var(--line); background: var(--band); margin-top: 4rem; }
.foot-main { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: 1.5rem 3rem; padding-block: 2.5rem 2rem; }
.foot-brand p { margin: 0.6rem 0 0; font-size: 0.875rem; color: var(--fg-label); max-width: 34ch; }
.foot-links { display: flex; flex-wrap: wrap; gap: 0.4rem 1.5rem; }
.foot-links a { color: var(--fg-muted); text-decoration: none; font-size: 0.9375rem; }
.foot-links a:hover { color: var(--fg); }
.foot-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.75rem 2rem; border-top: 1px solid var(--line); padding-block: 1.25rem 2rem; font-size: 0.8125rem; color: var(--fg-label); }
.foot-base p { margin: 0; }
.foot-notice { max-width: 70ch; }
.foot-notice .notice-tag { margin-right: 0.4rem; }

/* ---------------------------------------------------------------- buttons */

.btn {
  display: inline-flex; flex-direction: column; align-items: center; justify-content: center;
  font: 600 0.9375rem/1.2 var(--sans); text-decoration: none; cursor: pointer;
  padding: 0.8rem 1.2rem; border-radius: var(--radius-sm); border: 1px solid transparent;
  transition: background-color 120ms ease, border-color 120ms ease;
}
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-outline { background: transparent; color: var(--fg); border-color: var(--line-strong); }
.btn-outline:hover { border-color: var(--fg-muted); }
.btn-sooner { background: transparent; color: var(--accent); border-color: var(--accent-line); }
.btn-sooner:hover { background: var(--accent-wash); border-color: var(--accent); }
.btn-sm { padding: 0.5rem 0.9rem; font-size: 0.875rem; }
.btn > span { white-space: nowrap; }
.btn s { font-weight: 400; opacity: 0.6; margin-left: 0.35em; }
.btn.is-disabled { cursor: not-allowed; opacity: 0.55; }
.btn.is-disabled:hover { background: var(--accent); }
.btn-outline.is-disabled:hover { border-color: var(--line-strong); }
.btn small { font: 500 0.6875rem/1.3 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; margin-top: 0.25rem; opacity: 0.85; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 2rem 0 0; }

/* ---------------------------------------------------------------- hero */

.hero { border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; gap: 3rem; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); align-items: center; padding-block: clamp(3rem, 8vw, 6.5rem); }
@media (max-width: 60rem) { .hero-grid { grid-template-columns: 1fr; } }
.hero h1 { max-width: 14ch; }

.stats { display: flex; flex-wrap: wrap; gap: 1.5rem 3rem; margin: 2.5rem 0 0; padding-top: 1.75rem; border-top: 1px solid var(--line); }
.stats div { display: flex; flex-direction: column-reverse; }
.stats dt { font: 500 0.6875rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-label); margin-top: 0.35rem; }
.stats dd { margin: 0; font: 500 1.6rem/1 var(--mono); color: var(--fg); }

/* CFSR register */
.reg { margin: 0; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1rem, 2.5vw, 1.5rem); }
.reg-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.25rem 0.9rem; margin-bottom: 1rem; }
.reg-name { color: var(--fg); font-weight: 700; font-size: 1.25rem; letter-spacing: -0.01em; }
.reg-addr { font: 0.8125rem var(--mono); color: var(--fg-label); }
.reg-value { margin-left: auto; font: 600 clamp(1.05rem, 0.9rem + 0.8vw, 1.4rem) var(--mono); color: var(--accent); font-variant-numeric: tabular-nums; }
.reg-groups, .reg-bits { display: grid; grid-template-columns: repeat(16, minmax(0, 1fr)); }
.reg-groups span { font: 500 0.6875rem/1.4 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-label); padding: 0 0.3rem 0.4rem; border-bottom: 1px solid var(--line-strong); }
.reg-groups span + span { border-left: 1px solid var(--line-strong); }
.bit {
  display: flex; flex-direction: column; align-items: center; min-width: 0;
  padding: 0.4rem 0 0.5rem; border: 0; border-right: 1px solid var(--line-soft);
  background: var(--panel-2); color: var(--fg-muted); font: inherit; cursor: pointer;
  transition: background-color 140ms ease, color 140ms ease;
}
.bit-reserved-block { border-right-color: var(--line-strong); }
.bit-reserved-block .bit-name { writing-mode: horizontal-tb; transform: none; height: auto; margin: auto 0; }
.bit:last-child { border-right: 0; }
.bit-no { font: 0.6875rem var(--mono); color: var(--fg-label); }
.bit-name { writing-mode: vertical-rl; transform: rotate(180deg); font: 500 clamp(0.6875rem, 0.6rem + 0.25vw, 0.8125rem)/1.15 var(--sans); height: 10.5em; margin: 0.5rem 0; text-align: left; }
.bit-val { font: 600 0.9375rem var(--mono); }
.bit:hover { background: var(--bit-hover); color: var(--fg); }
.bit-set { background: var(--accent); color: var(--accent-ink); }
.bit-set .bit-no { color: var(--accent-ink); }
.bit-set:hover { background: var(--accent-hover); color: var(--accent-ink); }
.bit[aria-pressed="true"] { box-shadow: inset 0 0 0 2px var(--fg); position: relative; z-index: 1; }
.bit:focus-visible { outline-offset: -2px; position: relative; z-index: 1; }
:root { --fault: #e5484d; }
.bit.bit-glitch { background: var(--fault); color: #fff; }
.bit.bit-glitch .bit-no { color: #fff; }
.reg { transition: border-color 160ms ease; }
.reg.is-fault { border-color: rgba(229, 72, 77, 0.6); }
.reg-value.is-glitch { color: var(--fault); }
.reg.is-fault figcaption strong { color: var(--fault); }
.bit.reserved { cursor: default; background: transparent; color: var(--fg-label); opacity: 0.6; }
.reg figcaption { margin-top: 1rem; min-height: 4.8em; font-size: 0.9375rem; }
.reg figcaption strong { color: var(--fg); font-weight: 600; font-family: var(--mono); font-size: 0.875rem; }
.reg figcaption a { color: var(--accent); white-space: nowrap; }
.reg-note { margin: 0.75rem 0 0; padding-top: 0.75rem; border-top: 1px solid var(--line); font: 500 0.75rem/1.5 var(--mono); letter-spacing: 0.04em; color: var(--fg-label); }
@media (max-width: 30rem) { .bit-no { font-size: 0.5625rem; } .bit-val { font-size: 0.8125rem; } }
@media (prefers-reduced-motion: no-preference) {
  .bit { transition: background-color 220ms ease, color 220ms ease; }
  .bit-val { transition: color 220ms ease; }
  .reg-value { transition: color 220ms ease; }
}

/* ---------------------------------------------------------------- sections */

.section { padding-block: clamp(3.5rem, 8vw, 6rem); }
.band { background: var(--band); border-block: 1px solid var(--line); }
.section-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 1.5rem; margin-bottom: 1.5rem; }
.split { display: grid; gap: 2rem 4rem; grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr)); padding-block: clamp(3.5rem, 8vw, 6rem); }
.split-h { max-width: 16ch; }
.split-body p { font-size: 1.0625rem; max-width: 60ch; }

.legend-row { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 0.75rem 1.5rem; margin-bottom: 1.5rem; }
.legend { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.legend-row .region { margin: 0; padding: 0.45rem 0.75rem; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); }

/* ---------------------------------------------------------------- risk callout */

.risk-section { padding-bottom: 0; }
.risk { border: 1px solid var(--accent-line); border-left: 4px solid var(--accent); border-radius: var(--radius); background: linear-gradient(var(--accent-wash), var(--accent-wash)), var(--panel); padding: clamp(1.5rem, 4vw, 2.75rem); }
.risk-eyebrow { color: var(--accent); }
.risk h2 { max-width: 24ch; }
.risk .lede { color: var(--fg-body); max-width: 64ch; }
.risk-cases { list-style: none; margin: 2rem 0 0; padding: 0; display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
.risk-cases li { background: var(--band); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 1.1rem 1.2rem; }
.risk-looks { font: 500 0.75rem/1.4 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--fg-label); margin-bottom: 0.6rem; }
.risk-looks::before { content: "The code: "; color: var(--accent); }
.risk-fails::before { content: "The reality: "; font-weight: 600; color: var(--fg); }
.risk-sub { margin: 2rem 0 0; font-size: 1.15rem; }
.risk-fails { margin: 0; color: var(--fg-body); font-size: 0.9375rem; }
.risk-fails code { font: 0.875em var(--mono); color: var(--fg); background: var(--panel-2); border: 1px solid var(--line); border-radius: 4px; padding: 0.05em 0.3em; }

.risk-answer { display: grid; gap: 1.5rem 2.5rem; grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr)); align-items: start; margin-top: 2rem; padding-top: 2rem; border-top: 1px solid var(--accent-line); }
.risk-answer h3 { font-size: 1.35rem; margin-bottom: 0.6rem; }
.risk-answer p { margin: 0; max-width: 56ch; }

.includes { display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem 0.5rem; margin: 0 0 1.5rem; font-size: 0.875rem; }
.includes-label { font: 500 0.6875rem/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg-label); margin-right: 0.25rem; }
.includes span:not(.includes-label) { padding: 0.25rem 0.55rem; border: 1px solid var(--line-strong); border-radius: 4px; color: var(--fg-muted); }
.includes .includes-ai { color: var(--accent); border-color: var(--accent-line); background: var(--accent-wash); }

.risk-cta { margin-top: 1.25rem !important; }

/* ---------------------------------------------------------------- prompt pack (lead capture) */

.pack { display: grid; gap: 2rem 3.5rem; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; background: var(--panel); border: 1px solid var(--accent-line); border-radius: var(--radius); padding: clamp(1.5rem, 4vw, 3rem); box-shadow: 0 0 0 1px rgba(138, 191, 38, 0.06), 0 30px 80px -40px rgba(138, 191, 38, 0.25); }
@media (max-width: 56rem) { .pack { grid-template-columns: 1fr; } }
.pack h2 { max-width: 16ch; }
.pack-solo { grid-template-columns: 1fr; }
.pack-solo h2 { max-width: 28ch; }
.pack-solo .pack-copy { max-width: 46rem; }
.pack .capture { max-width: none; margin-top: 1.5rem; }
.pack .capture-inline { display: grid; grid-template-columns: 1fr auto; gap: 0.6rem; }
@media (max-width: 34rem) { .pack .capture-inline { grid-template-columns: 1fr; } }
.opt-in { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 400 !important; font-size: 0.875rem !important; color: var(--fg-muted) !important; margin-top: 0.4rem; cursor: pointer; }
.capture .opt-in input { flex: none; width: 1rem; height: 1rem; padding: 0; accent-color: var(--accent); margin: 0; }
.capture .opt-in { justify-self: start; }
.pack .fine { margin-top: 1rem; }
.pack-list { list-style: none; margin: 0; padding: 0; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--band); }
.pack-list li { display: flex; gap: 0.9rem; align-items: baseline; padding: 0.7rem 1rem; border-bottom: 1px solid var(--line-soft); font-size: 0.9375rem; color: var(--fg); }
.pack-list li:last-child { border-bottom: 0; }
.pack-no { font: 500 0.75rem var(--mono); color: var(--accent); flex: none; }

/* ---------------------------------------------------------------- training notice */

.notice { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.5rem 0.9rem; border: 1px solid rgba(226, 185, 59, 0.4); border-left: 3px solid var(--writing); border-radius: var(--radius-sm); background: rgba(226, 185, 59, 0.06); padding: 0.85rem 1rem; }
.notice p { margin: 0; flex: 1 1 24rem; font-size: 0.9375rem; color: var(--fg-body); }
.notice a { color: var(--writing); white-space: nowrap; }
.notice-tag { font: 600 0.6875rem/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--writing); }
.notice-compact { margin: 0 0 1.5rem; }
.notice-compact p { font-size: 0.875rem; }
.pricing-notice { margin-top: -0.25rem; }
.pricing-notice a, .pack .fine a { color: var(--fg-muted); }
.notice-page h2 { font-size: 1.4rem; margin-top: 2.5rem; }
.notice-page ul { padding-left: 1.2rem; display: grid; gap: 0.9rem; max-width: 66ch; }
.notice-page li strong { color: var(--fg); }
.notice-page > .notice { margin: 1.5rem 0; }

/* ---------------------------------------------------------------- chips */

.chip {
  display: inline-flex; align-items: center; gap: 0.4em; white-space: nowrap;
  font: 500 0.6875rem/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase;
  padding: 0.35rem 0.5rem; border-radius: 4px; border: 1px solid var(--line-strong); color: var(--fg-muted);
}
.chip::before { content: ""; width: 0.5em; height: 0.5em; border-radius: 1px; background: currentColor; }
.chip-released { color: var(--accent); border-color: var(--accent-line); background: var(--accent-wash); }
.chip-writing { color: var(--writing); border-color: rgba(226, 185, 59, 0.38); }
.chip-planned { color: var(--fg-label); }

/* ---------------------------------------------------------------- curriculum groups & module boxes */

.group { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); margin-bottom: 1.25rem; overflow: hidden; }
.group-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem 2rem; padding: 1.5rem 1.5rem 1.25rem; border-bottom: 1px solid var(--line); }
.group-head .eyebrow { margin-bottom: 0.5rem; }
.group-title { font-size: 1.25rem; margin-bottom: 0.35rem; }
.group-title a { text-decoration: none; }
.group-title a:hover { color: var(--accent); }
.group-short { color: var(--fg-muted); font-size: 0.9375rem; margin: 0; max-width: 62ch; }
.group-action { display: flex; align-items: flex-start; }
.group-buy { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 0.75rem 1.25rem; }
.group-buy .btn { padding: 0.6rem 1rem; font-size: 0.875rem; }
@media (max-width: 40rem) { .group-buy { justify-content: flex-start; } }
.group-price { display: grid; grid-template-columns: auto auto; align-items: baseline; justify-content: end; gap: 0 0.5rem; text-align: right; }
.price-now { font: 600 1.25rem var(--mono); color: var(--fg); }
.price-was { font: 0.875rem var(--mono); color: var(--fg-label); text-decoration: line-through; }
.price-note { grid-column: span 2; font-size: 0.8125rem; color: var(--fg-label); }
@media (max-width: 40rem) { .group-action { display: flex; align-items: flex-start; }
.group-buy { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 0.75rem 1.25rem; }
.group-buy .btn { padding: 0.6rem 1rem; font-size: 0.875rem; }
@media (max-width: 40rem) { .group-buy { justify-content: flex-start; } }
.group-price { justify-content: start; text-align: left; } }

.mods { display: grid; grid-template-columns: repeat(auto-fill, minmax(13.5rem, 1fr)); }
.group .mods { grid-template-columns: repeat(5, minmax(0, 1fr)); margin: 0 -1px -1px 0; }
.group .mod { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
@media (max-width: 64rem) { .group .mods { grid-template-columns: repeat(auto-fill, minmax(12rem, 1fr)); } }
@media (max-width: 40rem) {
  .group .mods, .mods-page { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mod { min-height: 6.5rem; padding: 0.9rem 1rem 1rem; }
  .mod .chip { font-size: 0.5625rem; padding: 0.3rem 0.4rem; }
}
.mod {
  display: flex; flex-direction: column; gap: 0.75rem; min-height: 7.5rem;
  padding: 1.1rem 1.25rem 1.2rem; background: var(--panel); text-decoration: none; color: var(--fg);
  transition: background-color 120ms ease;
}
.mod:hover { background: var(--panel-2); }
.mod:hover .mod-title { color: var(--accent); }
.mod-top { display: flex; justify-content: space-between; align-items: center; gap: 0.5rem; }
.mod-no { font: 500 0.8125rem var(--mono); color: var(--fg-label); }
.mod-title { font-weight: 600; font-size: 1rem; line-height: 1.3; letter-spacing: -0.01em; transition: color 120ms ease; }
.mod-date { margin-top: auto; font: 0.75rem var(--mono); color: var(--fg-label); }
.mod-released { box-shadow: inset 0 2px 0 var(--accent); }
.mod-writing { box-shadow: inset 0 2px 0 var(--writing); }

.mods-page { gap: 0.75rem; margin: 2.5rem 0; }
.mods-page .mod { border: 1px solid var(--line); border-radius: var(--radius-sm); }

/* ---------------------------------------------------------------- pricing */

.plans { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); margin-top: 2rem; }
.plan { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem; }
.plan h3 { font: 500 0.75rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-label); margin-bottom: 1rem; }
.plan-price { font: 600 2rem/1.1 var(--sans); letter-spacing: -0.02em; color: var(--fg); margin-bottom: 1rem; }
.plan-link { display: flex; align-items: flex-start; gap: 0.9rem; text-decoration: none; color: var(--fg); transition: border-color 120ms ease, background-color 120ms ease; }
.plan-link:hover { border-color: var(--accent); }
.plan-link.plan-featured .plan-icon, .plan-link.plan-featured .plan-link-title span { color: var(--accent); }
.plan-icon { flex: none; color: var(--fg-muted); margin-top: 0.15rem; }
.plan-link-text { display: grid; gap: 0.35rem; }
.plan-link-title { font-weight: 600; font-size: 1.0625rem; }
.plan-link-title span { color: var(--fg-muted); margin-left: 0.15rem; }
.plan-link-sub { color: var(--fg-muted); font-size: 0.9375rem; }

.letter { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.25rem, 3vw, 2rem); margin: 1.5rem 0 1rem; color: var(--fg-body); }
.letter p, .letter li { max-width: 64ch; }
.letter ul { padding-left: 1.2rem; margin: 0 0 1em; }
.letter strong { color: var(--fg); }
.claim-steps { margin: 0 0 1.5rem; padding-left: 1.3rem; display: grid; gap: 0.5rem; max-width: 62ch; }
.claim-steps li::marker { color: var(--accent); font-family: var(--mono); }
.letter-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem; margin-top: 1.5rem; }
.letter-actions .fine { margin: 0; }
.letter-actions .region { margin: 0 0 0 0.5rem; }
.plan-all { display: flex; flex-direction: column; }
.plan-was { font-size: 1rem; font-weight: 400; color: var(--fg-label); margin-left: 0.35rem; }
.plan-actions { display: flex; margin: 0.25rem 0 1.25rem; }
.plan-letter { display: flex; gap: 0.75rem; align-items: flex-start; margin-top: auto; padding-top: 1rem; border-top: 1px solid var(--accent-line); text-decoration: none; color: var(--fg); }
.plan-letter > span { display: grid; gap: 0.2rem; }
.plan-letter .plan-icon { color: var(--accent); }
.plan-letter .plan-link-title span { color: var(--accent); }
.plan-letter:hover .plan-link-title { color: var(--accent); }
.plan-featured { border-color: var(--accent-line); background: linear-gradient(var(--accent-wash), var(--accent-wash)), var(--panel); }

/* ---------------------------------------------------------------- forms */

.capture { display: grid; gap: 0.5rem; max-width: 34rem; }
.capture label { font-size: 0.875rem; font-weight: 600; color: var(--fg); margin-top: 0.4rem; }
.capture input, .capture textarea, .capture select {
  font: inherit; color: var(--fg); background: var(--band); width: 100%;
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm); padding: 0.75rem 0.85rem;
}
.capture textarea { resize: vertical; min-height: 5.5rem; }
.capture input::placeholder, .capture textarea::placeholder { color: var(--fg-label); }
.capture input:focus, .capture textarea:focus, .capture select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-wash); }
.capture button { justify-self: start; margin-top: 0.5rem; }
.capture-inline { grid-template-columns: 1fr auto; align-items: center; gap: 0.6rem; }
.capture-inline button { margin-top: 0; }
@media (max-width: 34rem) { .capture-inline { grid-template-columns: 1fr; } }

.notify { display: grid; gap: 1.5rem 3rem; grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr)); align-items: center; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.5rem, 4vw, 2.5rem); }
.notify .lede { margin: 0; }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem; max-width: 44rem; }
.panel-h { font-size: 1.15rem; margin-bottom: 0.25rem; }

.urgent { margin-top: 1.25rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--band); }
.urgent summary { cursor: pointer; padding: 0.85rem 1rem; color: var(--fg); font-weight: 600; list-style: none; display: flex; align-items: center; gap: 0.6rem; }
.urgent summary::-webkit-details-marker { display: none; }
.urgent summary::before { content: "+"; font: 600 1rem/1 var(--mono); color: var(--writing); width: 1rem; }
.urgent[open] summary::before { content: "–"; }
.urgent .capture { padding: 0 1rem 1rem; max-width: none; }

/* ---------------------------------------------------------------- module detail (dialog + page) */

.detail-title { font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.4rem); max-width: 24ch; }
.doc-main .detail-title { font-size: clamp(2rem, 1.4rem + 2.4vw, 3rem); }
.detail .lede { margin-bottom: 1.5rem; }
.facts { display: flex; flex-wrap: wrap; gap: 1rem 2.5rem; margin: 0 0 1.75rem; padding: 1rem 0; border-block: 1px solid var(--line); }
.facts dt { font: 500 0.6875rem/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg-label); margin-bottom: 0.4rem; }
.facts dd { margin: 0; color: var(--fg); font-weight: 500; }
.detail-h { font: 500 0.75rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-label); margin: 1.75rem 0 0.75rem; }
.path { margin: 0 0 1.5rem; padding: 0; list-style: none; counter-reset: step; }
.path li { counter-increment: step; position: relative; padding: 0.55rem 0 0.55rem 2.25rem; border-left: 1px solid var(--line-strong); margin-left: 0.6rem; color: var(--fg); }
.path li::before { content: counter(step); position: absolute; left: -0.65rem; top: 0.5rem; width: 1.3rem; height: 1.3rem; display: grid; place-items: center; font: 500 0.6875rem var(--mono); color: var(--fg-muted); background: var(--panel-2); border: 1px solid var(--line-strong); border-radius: 50%; }
.detail-note { color: var(--fg-body); max-width: 60ch; }
.offer { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: stretch; margin: 1rem 0; }
.offer .fine { flex-basis: 100%; margin: 0.25rem 0 0; }

.modal { width: min(44rem, calc(100vw - 2rem)); max-height: calc(100dvh - 2rem); padding: 0; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--panel); color: var(--fg-body); }
.modal::backdrop { background: var(--backdrop); backdrop-filter: blur(2px); }
.modal-inner { position: relative; padding: clamp(1.5rem, 4vw, 2.25rem); }
.modal-close { position: absolute; top: 0.75rem; right: 0.75rem; width: 2.25rem; height: 2.25rem; border-radius: var(--radius-sm); border: 1px solid var(--line); background: transparent; color: var(--fg-muted); font-size: 1.4rem; line-height: 1; cursor: pointer; }
.modal-close:hover { color: var(--fg); border-color: var(--line-strong); }
@media (prefers-reduced-motion: no-preference) {
  .modal[open] { animation: rise 160ms ease-out; }
  @keyframes rise { from { opacity: 0; transform: translateY(8px); } }
}

/* ---------------------------------------------------------------- module page (three columns) */

.doc { display: grid; grid-template-columns: 15rem minmax(0, 1fr) 13rem; gap: 3rem; padding-block: 3rem; align-items: start; }
.side, .toc { position: sticky; top: 5.5rem; font-size: 0.875rem; }
.side-h { font: 500 0.6875rem/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg-label); margin-bottom: 0.75rem; }
.side-h a { color: inherit; text-decoration: none; }
.side ol, .toc ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.15rem; }
.side li a, .toc li a { display: flex; gap: 0.55rem; align-items: baseline; padding: 0.4rem 0.6rem; border-radius: var(--radius-sm); color: var(--fg-muted); text-decoration: none; line-height: 1.35; }
.side li a:hover, .toc li a:hover { color: var(--fg); background: var(--line-soft); }
.side li a[aria-current="page"] { color: var(--accent); background: var(--accent-wash); }
.toc ul { border-left: 1px solid var(--line); }
.toc li a { border-radius: 0; padding-left: 0.9rem; }
.dot { flex: none; width: 0.45rem; height: 0.45rem; border-radius: 1px; background: var(--fg-label); transform: translateY(-0.1em); }
.dot-released { background: var(--accent); }
.dot-writing { background: var(--writing); }
@media (max-width: 72rem) { .doc { grid-template-columns: 14rem minmax(0, 1fr); } .toc { display: none; } }
@media (max-width: 52rem) { .doc { grid-template-columns: 1fr; } .side { position: static; order: 2; border-top: 1px solid var(--line); padding-top: 1.5rem; } }

.prose { max-width: 70ch; font-size: 1.0625rem; line-height: 1.75; margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--line); }
.prose h2 { font-size: 1.6rem; margin-top: 2.25em; scroll-margin-top: 5.5rem; }
.prose h3 { font-size: 1.2rem; margin-top: 1.75em; scroll-margin-top: 5.5rem; }
.prose strong { color: var(--fg); }
.prose a { color: var(--accent); }
.prose code { font: 0.875em var(--mono); background: var(--panel-2); border: 1px solid var(--line); padding: 0.1em 0.35em; border-radius: 4px; color: var(--fg); }
.prose pre { font: 0.875rem/1.6 var(--mono); background: var(--band); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 1rem 1.25rem; overflow-x: auto; }
.prose pre code { background: none; border: 0; padding: 0; }
.prose table { border-collapse: collapse; font-size: 0.9375rem; margin: 1.5rem 0; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 0.5rem 0.75rem; text-align: left; }
.prose th { background: var(--panel); color: var(--fg); }
.prose ul li::marker { color: var(--accent); }
.prose img { max-width: 100%; height: auto; }
.prose > :last-child { -webkit-mask-image: linear-gradient(#000 25%, transparent); mask-image: linear-gradient(#000 25%, transparent); }

.cliff { margin-top: 1.5rem; padding: 1.5rem; border: 1px solid var(--accent-line); border-radius: var(--radius); background: var(--accent-wash); max-width: 70ch; scroll-margin-top: 5.5rem; }
.cliff h2 { font-size: 1.4rem; }
.locked { padding-left: 1.2rem; margin: 0; columns: 2 16rem; column-gap: 2rem; color: var(--fg); }
.locked li { break-inside: avoid; margin-bottom: 0.35rem; }

.crumbs { font-size: 0.875rem; color: var(--fg-label); margin-bottom: 2rem; }
.crumbs a { color: var(--fg-muted); }
.page-title { max-width: 22ch; font-size: clamp(2.2rem, 1.5rem + 2.8vw, 3.6rem); }

/* Calmer curriculum: "planned" is the default state, so only writing/released modules carry a chip. */
.group .mod .chip-planned { display: none; }
.group .mod { gap: 0.5rem; min-height: 6rem; border-color: var(--line-soft); }
.group .mod-title { font-weight: 500; font-size: 0.9375rem; color: var(--fg-body); }
.group .mod:hover .mod-title { color: var(--accent); }
.group .mod-no { font-size: 0.75rem; }
.group-head { padding: 1.5rem 1.5rem 1.4rem; border-bottom-color: var(--line-soft); gap: 1.25rem 3rem; }
.group-head .eyebrow { opacity: 0.8; letter-spacing: 0.1em; }
.group-short { font-size: 0.9375rem; max-width: 52ch; }
.group-price .price-note { font-size: 0.75rem; }
.group-buy .btn .btn-sub { opacity: 0.7; }

/* Green theme: faint accent tint on track cards, a stronger tint on the writing/released ones. */
.group { background: color-mix(in srgb, var(--accent) 4%, var(--panel)); border-color: color-mix(in srgb, var(--accent) 16%, var(--line)); }
.group-head { background: color-mix(in srgb, var(--accent) 7%, var(--panel)); border-bottom-color: color-mix(in srgb, var(--accent) 14%, var(--line-soft)); }
.group .mod { background: transparent; border-color: color-mix(in srgb, var(--accent) 10%, var(--line-soft)); }
.group .mod:hover { background: color-mix(in srgb, var(--accent) 10%, var(--panel)); }
.group .mod-writing { background: color-mix(in srgb, var(--writing) 8%, transparent); }
.group .mod-released { background: var(--accent-wash); }
.group-head .eyebrow { color: var(--accent); opacity: 1; }

/* Deep dives: public in full, so no fade on the last paragraph. */
.note-body { margin-top: 2rem; }
.note-body > :last-child { -webkit-mask-image: none; mask-image: none; }
.note-title { max-width: 26ch; font-size: clamp(1.9rem, 1.4rem + 2vw, 2.8rem); }
.note-list { list-style: none; padding: 0; margin: 2.5rem 0 0; display: grid; gap: 1rem; }
.note-list a { display: grid; gap: 0.35rem; padding: 1.25rem 1.4rem; text-decoration: none; color: var(--fg-body); background: color-mix(in srgb, var(--accent) 4%, var(--panel)); border: 1px solid color-mix(in srgb, var(--accent) 16%, var(--line)); border-radius: var(--radius); }
.note-list a:hover { background: color-mix(in srgb, var(--accent) 10%, var(--panel)); }
.note-list strong { color: var(--fg); font-size: 1.1rem; }
.notes-wide { max-width: 64rem; }
.note-wide { max-width: 56rem; }
.note-filters { display: grid; gap: 0.6rem; margin-top: 2rem; }
.note-filters p { margin: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem; }
.note-filters strong { font: 500 0.75rem var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-muted, var(--fg-body)); margin-right: 0.4rem; min-width: 3.5rem; }
.note-filters a, .note-tags a, .note-tags span { font: 500 0.8rem var(--mono); padding: 0.2rem 0.65rem; border: 1px solid var(--line-strong); border-radius: 999px; text-decoration: none; color: var(--fg-body); }
.note-filters a span { opacity: 0.6; }
.note-filters a:hover, .note-tags a:hover, .note-filters a[aria-current] { border-color: var(--accent); color: var(--accent); }
.note-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.5rem 0 0; }
.note-date { font: 500 0.75rem var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }

/* Global LinkedIn link in the masthead. */
.social-link { flex: none; display: grid; place-items: center; width: 2.25rem; height: 2.25rem; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); color: #0a66c2; color: light-dark(#0a66c2, #5aa9f0); }
.social-link:hover { border-color: currentColor; background: color-mix(in srgb, currentColor 10%, transparent); }
.social-link:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.social-link svg { width: 1.1rem; height: 1.1rem; }

.note-share { margin: 2rem 0; }
.note-share .btn { display: inline-flex; align-items: center; gap: 0.6rem; }
.note-share svg { width: 1.1rem; height: 1.1rem; color: #0a66c2; color: light-dark(#0a66c2, #5aa9f0); }

/* ---------------------------------------------------------------- toolkit, licences */

.plans-extra { grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr)); }
.plans-extra .plan-actions { flex-wrap: wrap; }
.plan-link.plan { padding: 1.5rem; }
.plan-from { font-size: 1rem; font-weight: 400; color: var(--fg-label); }
.plan-list { margin: 0; padding-left: 1.1rem; color: var(--fg-body); display: grid; gap: 0.4rem; font-size: 0.9375rem; }

/* ---------------------------------------------------------------- RAM/ROM calculator */

.calc { display: grid; gap: 1.25rem; margin: 2rem 0; }
.calc fieldset { margin: 0; padding: 1.25rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); display: grid; gap: 1rem; }
.calc legend { padding: 0 0.4rem; font: 500 0.75rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-label); }
.calc-field { display: grid; gap: 0.35rem; }
.calc-field > span:first-child { font-size: 0.9375rem; font-weight: 600; color: var(--fg); }
.calc-field small { font-size: 0.8125rem; color: var(--fg-label); }
.calc-input { display: flex; align-items: stretch; max-width: 20rem; }
.calc-input input {
  flex: 1; min-width: 0; font: 0.9375rem var(--mono); color: var(--fg); background: var(--band);
  border: 1px solid var(--line-strong); border-right: 0; border-radius: var(--radius-sm) 0 0 var(--radius-sm); padding: 0.6rem 0.75rem;
}
.calc-input input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-wash); }
.calc-unit { display: flex; align-items: center; padding: 0 0.75rem; font: 0.8125rem var(--mono); color: var(--fg-muted); border: 1px solid var(--line-strong); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; background: var(--panel-2); }
.calc-check { display: flex; align-items: center; gap: 0.5rem; font-size: 0.9375rem; color: var(--fg); cursor: pointer; }
.calc-check input { width: 1rem; height: 1rem; margin: 0; accent-color: var(--accent); }
.calc-out { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); }
.calc-out > div { padding: 1.25rem; border: 1px solid var(--accent-line); border-radius: var(--radius); background: linear-gradient(var(--accent-wash), var(--accent-wash)), var(--panel); }
.calc-label { margin: 0 0 0.4rem; font: 500 0.75rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-label); }
.calc-value { margin: 0 0 0.5rem; font: 600 2rem/1.1 var(--mono); letter-spacing: -0.02em; color: var(--fg); }
.calc-formula { display: grid; gap: 0.5rem; padding-left: 1.1rem; font: 0.875rem/1.6 var(--mono); color: var(--fg-body); }
#upgrade { margin-top: 1.5rem; }
.plans + .fine { margin-top: 1.25rem; }

/* ---------------------------------------------------------------- AI toolkit (under Track 10, not a track) */

.addon-sep { display: flex; align-items: center; gap: 1rem; margin: 3rem 0 1.25rem; font: 500 0.75rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-label); }
.addon-sep::before, .addon-sep::after { content: ""; flex: 1; border-top: 1px dashed var(--line-strong); }
.addon { border: 1px dashed var(--line-strong); border-radius: var(--radius); background: var(--band); }
.addon-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1.25rem 3rem; padding: 1.5rem; border-bottom: 1px dashed var(--line); }
.addon-head .eyebrow { margin-bottom: 0.5rem; color: var(--fg-muted); letter-spacing: 0.1em; }
.addon-items { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.addon-items li { display: grid; gap: 0.35rem; padding: 1.1rem 1.5rem; border-right: 1px dashed var(--line); }
.addon-items li:last-child { border-right: 0; }
.addon-items strong { font-size: 0.9375rem; color: var(--fg); }
.addon-items span { font-size: 0.875rem; color: var(--fg-muted); }
.addon-note { margin: 0; padding: 1rem 1.5rem 1.25rem; border-top: 1px dashed var(--line); font-size: 0.8125rem; color: var(--fg-label); max-width: none; }
@media (max-width: 48rem) {
  .addon-items { grid-template-columns: 1fr; }
  .addon-items li { border-right: 0; border-bottom: 1px dashed var(--line); }
  .addon-items li:last-child { border-bottom: 0; }
}
.plan-sub { margin: 1rem 0; padding-top: 0.9rem; border-top: 1px solid var(--line); }
.plan-sub p { margin: 0 0 0.35rem; font-size: 0.9375rem; color: var(--fg-body); }
.plan-sub-h { display: flex; justify-content: space-between; align-items: baseline; gap: 0.75rem; font: 500 0.75rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-label) !important; }
.plan-sub-price { font: 600 1.125rem/1.2 var(--sans); letter-spacing: -0.01em; text-transform: none; color: var(--fg); }

/* Narrow phones: keep the header inside the viewport (the footer still links LinkedIn). */
@media (max-width: 30rem) { .masthead .social-link { display: none; } .masthead-row { gap: 0.5rem; } .masthead-cta { padding-inline: 0.7rem; } }

/* ---------------------------------------------------------------- pricing tabs */

.tabs { margin-top: 1.5rem; }
.tablist { display: inline-flex; gap: 0.25rem; padding: 0.25rem; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--panel); }
.tablist [role="tab"] { font: 600 0.9375rem var(--sans); color: var(--fg-muted); background: none; border: 0; border-radius: var(--radius-sm); padding: 0.55rem 1.1rem; cursor: pointer; }
.tablist [role="tab"]:hover { color: var(--fg); }
.tablist [role="tab"][aria-selected="true"] { background: var(--accent); color: var(--accent-ink); }
.tablist [role="tab"]:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.tabpanel[hidden] { display: none; }
.tabpanel { padding-top: 1.25rem; }
.tabpanel > .region:first-child { margin-top: 0; }

.tab-cta { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.25rem; }
.tabs + .plans-extra { grid-template-columns: minmax(0, 1fr); margin-top: 1.5rem; }
@media (max-width: 30rem) { .tablist { display: flex; } .tablist [role="tab"] { flex: 1; padding-inline: 0.5rem; } }

/* ---------------------------------------------------------------- track blocks: number badge + progress strip */

.group-head { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: start; gap: 1.25rem 1.75rem; }
.group-no { display: grid; justify-items: center; gap: 0.15rem; min-width: 4.25rem; padding: 0.6rem 0.75rem 0.5rem; border: 1px solid var(--accent-line); border-radius: var(--radius-sm); background: var(--accent-wash); font-family: var(--mono); }
.group-no span { font-size: 0.625rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--fg-label); }
.group-no b { font-size: 2rem; line-height: 1; font-weight: 600; letter-spacing: -0.02em; color: var(--accent); }
.group-planned .group-no { border-style: dashed; }
.group-planned .group-no b { color: var(--fg-muted); }
.group-main { min-width: 0; }
.group-progress { display: flex; align-items: center; gap: 0.75rem; margin-top: 0.9rem; }
.seg-row { display: inline-flex; gap: 3px; }
.seg { width: 1.6rem; height: 6px; border-radius: 2px; background: var(--line-strong); }
.seg-writing { background: var(--writing); }
.seg-released { background: var(--accent); }
.seg-label { font: 500 0.6875rem/1.4 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-label); }
.group-open .group-no, .group-complete .group-no { box-shadow: 0 0 0 3px var(--accent-wash); }
@media (max-width: 40rem) {
  .group-head { grid-template-columns: auto minmax(0, 1fr); }
  .group-head > .group-action, .group-head > .group-buy { grid-column: 1 / -1; }
  .group-no { min-width: 3.4rem; padding: 0.45rem 0.55rem; }
  .group-no b { font-size: 1.5rem; }
  .seg { width: 1.1rem; }
}

/* ---------------------------------------------------------------- why it matters (business value) */

.roi { margin: 1.25rem 0; padding: 0.9rem 1.1rem; border-left: 3px solid var(--accent); background: var(--accent-wash); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.roi-label { display: block; margin-bottom: 0.3rem; font: 500 0.6875rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }
.roi p { margin: 0; color: var(--fg); font-size: 1rem; }
.roi-list { list-style: none; margin: 0 0 2.5rem; padding: 0; display: grid; gap: 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.roi-list li { display: grid; grid-template-columns: 3rem minmax(0, 1fr); gap: 0.75rem; padding: 0.9rem 1.1rem; border-bottom: 1px solid var(--line-soft); }
.roi-list li:last-child { border-bottom: 0; }
.roi-no { font: 500 0.8125rem var(--mono); color: var(--fg-label); padding-top: 0.15rem; }
.roi-list strong { display: block; margin-bottom: 0.15rem; color: var(--fg); }
.roi-list span > :not(strong) { color: var(--fg-body); }

/* ---------------------------------------------------------------- cost of a single failure */

.impact { margin: 0 0 2.5rem; }
.impact-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; margin: 0 0 1rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--line); overflow: hidden; }
.impact-grid > div { background: var(--panel); padding: 1.1rem 1.25rem; }
.impact-grid dt { font: 500 0.6875rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-label); margin-bottom: 0.4rem; }
.impact-grid dd { margin: 0; color: var(--fg); font-size: 0.9375rem; }
.impact-grid > div:nth-child(2) dd { font-weight: 600; }
@media (max-width: 48rem) { .impact-grid { grid-template-columns: 1fr; } }
.table-wrap { overflow-x: auto; margin: 2rem 0 1rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.econ { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
.econ th, .econ td { text-align: left; vertical-align: top; padding: 0.9rem 1rem; border-bottom: 1px solid var(--line-soft); }
.econ thead th { font: 500 0.6875rem/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg-label); background: var(--band); }
.econ tbody th { min-width: 11rem; font-weight: 600; }
.econ tbody th span { display: block; font-weight: 400; color: var(--fg-muted); font-size: 0.875rem; }
.econ td:nth-child(2) { white-space: nowrap; font-weight: 600; }
.econ td:nth-child(4) { font-weight: 600; }
.econ-all { background: var(--accent-wash); }
.econ-note { max-width: 80ch; }
@media (max-width: 48rem) {
  .econ thead { display: none; }
  .econ, .econ tbody, .econ tr, .econ th, .econ td { display: block; }
  .econ tr { border-bottom: 1px solid var(--line); padding: 0.5rem 0; }
  .econ th, .econ td { border: 0; padding: 0.35rem 1rem; }
  .econ td::before { content: attr(data-label); display: block; font: 500 0.625rem/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg-label); }
}

/* AI toolkit: reads as a product for sale */
.addon { border: 1px solid var(--accent-line); border-top: 3px solid var(--accent); background: linear-gradient(var(--accent-wash), transparent 55%), var(--panel); box-shadow: 0 1px 0 var(--line-soft); }
.addon-head { align-items: stretch; border-bottom: 1px solid var(--line); }
.addon-head > div:first-child { flex: 1 1 22rem; min-width: 0; }
.addon-head .group-title { font-size: 1.5rem; letter-spacing: -0.02em; }
.addon-head .eyebrow { color: var(--accent); }
.addon-buy { flex: 0 1 21rem; display: grid; gap: 0.75rem; align-content: start; padding: 1.1rem 1.25rem; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--panel); }
.addon-price { margin: 0; font: 600 2.25rem/1 var(--sans); letter-spacing: -0.03em; color: var(--fg); }
.addon-price-label { display: block; margin-bottom: 0.4rem; font: 500 0.6875rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-label); }
.addon-actions { display: grid; gap: 0.5rem; }
.addon-actions .btn { justify-content: center; width: 100%; }
.addon-buy .fine { margin: 0; }
.addon-items, .addon-items li, .addon-note { border-color: var(--line); border-style: solid; }
.addon-items li { border-width: 0 1px 0 0; }
.addon-items li:last-child { border-right: 0; }
.addon-note { border-width: 1px 0 0; }
.addon-sep::before, .addon-sep::after { border-top-style: solid; border-top-color: var(--accent-line); }
.addon-sep { color: var(--accent); }
@media (max-width: 48rem) { .addon-items li { border-width: 0 0 1px; } .addon-items li:last-child { border-bottom: 0; } .addon-buy { flex-basis: 100%; } }
.addon-items { border-width: 0; }

/* track block: ROI line */
.group-roi { display: grid; gap: 0.2rem; margin: 0.9rem 0 0; padding: 0.65rem 0.9rem; max-width: 62ch; border-left: 3px solid var(--accent); background: var(--accent-wash); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-size: 0.875rem; color: var(--fg); }
.group-roi-label { font: 500 0.625rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }
.group-roi a { color: var(--accent); font-weight: 600; }
.group-roi { display: block; }
.group-roi-label { display: block; margin-bottom: 0.2rem; }

/* Larger reading size on desktop and tablet: everything is in rem, so this scales the whole site.
   Media-query breakpoints are unaffected (rem in a media query always means the browser default 16px). */
@media (min-width: 48rem) { html { font-size: 112.5%; } }
@media (min-width: 64rem) { html { font-size: 125%; } :root { --wrap: 80rem; } }
@media (max-width: 56rem) { .masthead .social-link { display: none; } .masthead-row { gap: 0.75rem; } }
.risk-answer p + p { margin-top: 0.9rem; }
.risk-head .lede + .lede { margin-top: 1rem; }

.risk-impact { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin: 1.75rem 0 0.5rem; }
.risk-impact > div { padding: 1.25rem 1.4rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--panel); }
.risk-impact h3 { margin: 0 0 0.75rem; font: 500 0.75rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }
.risk-impact ul { margin: 0; padding-left: 1.1rem; display: grid; gap: 0.6rem; color: var(--fg-body); font-size: 0.9375rem; }
@media (max-width: 48rem) { .risk-impact { grid-template-columns: 1fr; } }

/* Inline code never splits across lines (so -O2 or -Os stays whole); code blocks keep their own wrapping. */
code { white-space: nowrap; }
pre code { white-space: pre; }