/* Allegra Cursos: identidad del sitio de venta.
   Azul profundo + ámbar de acento; tokens para claro y oscuro; responsive desde 360 px. */

:root {
  --font-display: "Newsreader", "Iowan Old Style", Georgia, serif;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --bg: #f6f7fa;
  --surface: #ffffff;
  --surface-2: #edf1f7;
  --text: #0e1a2b;
  --muted: #47566e;
  --border: #d3dae6;
  --border-strong: #b5c0d2;
  --brand: #0b2a5b;
  --link: #1747a6;
  --link-hover: #0b2a5b;
  --accent: #eda73a;
  --accent-ink: #1d1300;
  --accent-text: #8a5100;
  --accent-soft: #fdf1dc;
  --hero-bg: #0a2350;
  --hero-bg-2: #071a3d;
  --hero-text: #f3f6fb;
  --hero-muted: #c4d0e6;
  --hero-line: #23457f;
  --ok: #17663a;
  --ok-soft: #e4f4ea;
  --bad: #a3261b;
  --bad-soft: #fbe9e7;
  --warn: #8a5100;
  --warn-soft: #fdf1dc;
  --focus: #1747a6;
  --bubble: #0b2a5b;
  --shadow: 0 1px 2px rgba(14, 26, 43, .06), 0 8px 24px rgba(14, 26, 43, .06);

  --radius: 10px;
  --radius-sm: 6px;
  --wrap: 1180px;
  --gutter: 16px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #09111f;
    --surface: #101b2d;
    --surface-2: #142238;
    --text: #e7edf6;
    --muted: #a7b4c9;
    --border: #24344d;
    --border-strong: #34496a;
    --brand: #a9c3ff;
    --link: #9dbdff;
    --link-hover: #c9dafd;
    --accent: #f2b44c;
    --accent-ink: #1d1300;
    --accent-text: #f4c06b;
    --accent-soft: #2a2213;
    --hero-bg: #0b1a33;
    --hero-bg-2: #071224;
    --hero-text: #f3f6fb;
    --hero-muted: #b9c6dd;
    --hero-line: #22385d;
    --ok: #6fd69a;
    --ok-soft: #10291c;
    --bad: #ff9a8f;
    --bad-soft: #2e1513;
    --warn: #f4c06b;
    --warn-soft: #2a2213;
    --focus: #f2b44c;
    --bubble: #23457f;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #09111f;
  --surface: #101b2d;
  --surface-2: #142238;
  --text: #e7edf6;
  --muted: #a7b4c9;
  --border: #24344d;
  --border-strong: #34496a;
  --brand: #a9c3ff;
  --link: #9dbdff;
  --link-hover: #c9dafd;
  --accent: #f2b44c;
  --accent-ink: #1d1300;
  --accent-text: #f4c06b;
  --accent-soft: #2a2213;
  --hero-bg: #0b1a33;
  --hero-bg-2: #071224;
  --hero-text: #f3f6fb;
  --hero-muted: #b9c6dd;
  --hero-line: #22385d;
  --ok: #6fd69a;
  --ok-soft: #10291c;
  --bad: #ff9a8f;
  --bad-soft: #2e1513;
  --warn: #f4c06b;
  --warn-soft: #2a2213;
  --focus: #f2b44c;
  --bubble: #23457f;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
  color-scheme: dark;
}

/* ---------------------------------------------------------------- base */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  overflow-wrap: break-word;
}
h1, h2, h3 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; letter-spacing: -0.01em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.2rem, 5.2vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }
h3 { font-size: 1.3rem; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
a { color: var(--link); text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:hover { color: var(--link-hover); text-decoration-thickness: 2px; }
strong { font-weight: 600; }
img, svg { max-width: 100%; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 3px; }
main:focus { outline: none; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
@media (min-width: 720px) { :root { --gutter: 32px; } }
.wrap--narrow { max-width: 820px; }
.muted { color: var(--muted); }
.small { font-size: .9rem; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.icon { width: 24px; height: 24px; flex: none; }
.icon--lg { width: 32px; height: 32px; }

.skip { position: absolute; left: 8px; top: -60px; z-index: 100; background: var(--accent); color: var(--accent-ink); padding: 10px 14px; border-radius: var(--radius-sm); font-weight: 600; }
.skip:focus { top: 8px; color: var(--accent-ink); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent-text);
  margin: 0 0 .9rem;
}
.eyebrow--hero { color: var(--accent); }

/* -------------------------------------------------------------- header */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  -webkit-backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header__inner { display: flex; align-items: center; gap: 16px; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 600; letter-spacing: .01em; margin: 0; }
.brand:hover { color: var(--text); }
.brand__mark { width: 14px; height: 14px; background: var(--accent); border-radius: 2px; box-shadow: 5px 5px 0 0 var(--brand); margin-right: 4px; }
.brand__name { font-size: 1.05rem; }
.brand__name span { color: var(--muted); font-weight: 500; }
.site-nav { margin-left: auto; }
.site-nav__links { list-style: none; display: none; gap: 4px; }
.site-nav__links a { display: block; padding: 8px 12px; border-radius: var(--radius-sm); color: var(--text); text-decoration: none; font-size: .95rem; }
.site-nav__links a:hover { background: var(--surface-2); }
@media (min-width: 860px) { .site-nav__links { display: flex; } }
.theme-toggle {
  margin-left: auto; display: inline-grid; place-items: center;
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer;
}
.site-nav + .theme-toggle { margin-left: 0; }
@media (max-width: 859px) { .site-nav { margin-left: auto; } .theme-toggle { margin-left: 0; } }
.theme-toggle:hover { border-color: var(--border-strong); }
.theme-toggle .icon--sun { display: none; }
.theme-toggle[data-current="dark"] .icon--sun { display: block; }
.theme-toggle[data-current="dark"] .icon--moon { display: none; }

/* --------------------------------------------------------------- hero */
.hero {
  background: linear-gradient(160deg, var(--hero-bg) 0%, var(--hero-bg-2) 100%);
  color: var(--hero-text);
  padding: 56px 0 64px;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; inset: 0 0 0 auto; width: 38%;
  background-image: repeating-linear-gradient(90deg, var(--hero-line) 0 1px, transparent 1px 40px);
  opacity: .45; pointer-events: none;
  mask-image: linear-gradient(90deg, transparent, #000 60%);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 60%);
}
.hero a:not(.btn) { color: var(--hero-text); }
.hero__grid { display: grid; gap: 40px; position: relative; z-index: 1; }
@media (min-width: 980px) { .hero__grid { grid-template-columns: minmax(0, 1.55fr) minmax(320px, 1fr); align-items: start; gap: 56px; } .hero { padding: 88px 0 96px; } }
.hero__title { color: #fff; margin-bottom: .25em; max-width: 16ch; }
.hero--catalog .hero__title { max-width: 22ch; }
.hero__subtitle { font-size: clamp(1.15rem, 2.2vw, 1.4rem); color: var(--hero-muted); margin-bottom: 1.4em; }
.hero__summary { font-family: var(--font-display); font-size: clamp(1.25rem, 2.4vw, 1.55rem); line-height: 1.35; color: #fff; max-width: 34ch; margin-bottom: .8em; }
.hero--catalog .hero__summary { max-width: 52ch; color: var(--hero-muted); font-family: var(--font-body); font-size: 1.15rem; line-height: 1.55; }
.hero__promise { color: var(--hero-muted); max-width: 60ch; margin-bottom: 2em; }

.factsheet {
  position: relative; z-index: 1;
  background: rgba(255, 255, 255, .045);
  border: 1px solid var(--hero-line);
  border-radius: var(--radius);
  padding: 24px;
}
.factsheet__title { font-family: var(--font-mono); font-size: .78rem; font-weight: 500; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin-bottom: 1rem; }
.factsheet__list { margin: 0; display: grid; }
.factsheet__list div { display: grid; grid-template-columns: 6.5rem minmax(0, 1fr); gap: 12px; padding: 11px 0; border-top: 1px solid var(--hero-line); }
@media (max-width: 479px) { .factsheet { padding: 20px 18px; } .factsheet__list div { grid-template-columns: 5.6rem minmax(0, 1fr); gap: 10px; } .factsheet__list dd { font-size: .97rem; } }
.factsheet__list div:first-child { border-top: 0; padding-top: 0; }
.factsheet__list dt { color: var(--hero-muted); font-size: .9rem; }
.factsheet__list dd { margin: 0; color: #fff; font-weight: 500; }

/* ------------------------------------------------------------ buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 12px 22px;
  border-radius: var(--radius-sm); border: 1px solid transparent;
  font: 600 1rem/1.2 var(--font-body); text-decoration: none; cursor: pointer;
  transition: background-color .15s, border-color .15s, color .15s;
}
.btn--sm { min-height: 44px; padding: 10px 16px; font-size: .95rem; }
.btn--primary { background: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { background: color-mix(in srgb, var(--accent) 85%, #fff); color: var(--accent-ink); text-decoration: none; }
.btn--secondary { background: transparent; color: var(--link); border-color: currentColor; }
.btn--secondary:hover { background: var(--surface-2); color: var(--link-hover); text-decoration: none; }
.btn--ghost { background: var(--surface); color: var(--text); border-color: var(--border-strong); }
.btn--ghost:hover { background: var(--surface-2); color: var(--text); }
.hero .btn--secondary, .cta-band .btn--secondary { color: #fff; border-color: rgba(255, 255, 255, .55); }
.hero .btn--secondary:hover, .cta-band .btn--secondary:hover { background: rgba(255, 255, 255, .08); color: #fff; }
.hero :focus-visible, .cta-band :focus-visible { outline-color: var(--accent); }

.cta-group { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 14px; }
.cta-redeem { display: inline-flex; align-items: center; min-height: 44px; padding: 0 4px; font-weight: 500; }
.hero .cta-redeem, .cta-band .cta-redeem { color: #fff; }
@media (max-width: 479px) { .cta-group .btn { width: 100%; } }

/* ----------------------------------------------------------- sections */
.section { padding: 64px 0; }
@media (min-width: 980px) { .section { padding: 96px 0; } }
.section--tint { background: var(--surface-2); }
.section__head { max-width: 760px; margin-bottom: 40px; }
.section__head--row { max-width: none; display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 16px 24px; }
.section__head--row > div { max-width: 760px; }
.section__lede { font-size: 1.12rem; color: var(--muted); max-width: 64ch; }

.split { display: grid; gap: 32px; }
@media (min-width: 900px) { .split { grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 56px; } .split--even { grid-template-columns: 1fr 1fr; align-items: center; } }
.prose p { font-size: 1.1rem; max-width: 64ch; }
.stack { display: grid; gap: 16px; }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.section--tint .panel { background: var(--surface); }
.panel__title { font-family: var(--font-body); font-size: 1rem; font-weight: 600; margin-bottom: 12px; }
.checklist { list-style: none; display: grid; gap: 10px; }
.checklist li { position: relative; padding-left: 28px; }
.checklist li::before {
  content: ""; position: absolute; left: 2px; top: .5em; width: 12px; height: 7px;
  border-left: 2px solid var(--accent-text); border-bottom: 2px solid var(--accent-text); transform: rotate(-45deg);
}
.checklist--req li::before { width: 8px; height: 8px; border: 2px solid var(--link); border-radius: 50%; transform: none; top: .55em; left: 3px; }

/* ----------------------------------------------------------- outcomes */
.outcomes { list-style: none; display: grid; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
@media (min-width: 760px) { .outcomes { grid-template-columns: 1fr 1fr; } }
.outcomes li { background: var(--surface); padding: 24px; display: grid; grid-template-columns: 2.6rem 1fr; gap: 12px; }
.outcomes p { margin: 0; }
.outcome__n { font-family: var(--font-mono); color: var(--accent-text); font-size: .95rem; padding-top: .15em; }

/* ----------------------------------------------------------- projects */
.projects { display: grid; gap: 20px; }
@media (min-width: 760px) { .projects { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1100px) { .projects { grid-template-columns: repeat(3, 1fr); } }
.project { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; display: flex; flex-direction: column; box-shadow: var(--shadow); }
.project--note { background: transparent; box-shadow: none; border-style: dashed; border-color: var(--border-strong); }
.project--note p { color: var(--muted); }
.project--note .project__covers { color: var(--text); }
.project__num { font-family: var(--font-mono); font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-text); margin-bottom: .6rem; }
.project__name { font-size: 1.35rem; }
.project__proof-title { font-weight: 600; font-size: .95rem; margin: .3em 0 .5em; }
.proof, .deliverables { list-style: none; display: grid; gap: 8px; margin-bottom: 1.1em; font-size: .97rem; }
.proof li, .deliverables li { position: relative; padding-left: 20px; }
.proof li::before, .deliverables li::before { content: ""; position: absolute; left: 0; top: .62em; width: 8px; height: 2px; background: var(--accent); }
.project__covers { margin-top: auto; padding-top: 14px; border-top: 1px solid var(--border); font-size: .9rem; color: var(--muted); margin-bottom: 0; }
.project__covers span { font-weight: 600; color: var(--text); }
.project--capstone {
  margin-top: 20px; display: grid; gap: 24px;
  background: var(--hero-bg); color: var(--hero-text); border-color: var(--hero-line);
}
.project--capstone .project__num { color: var(--accent); }
.project--capstone .project__name { color: #fff; font-size: 1.7rem; }
.project--capstone .muted { color: var(--hero-muted); }
.project--capstone .project__proof-title { color: #fff; }
@media (min-width: 900px) { .project--capstone { grid-template-columns: 1fr 1fr; padding: 36px; gap: 48px; } .project--capstone .deliverables { grid-template-columns: 1fr 1fr; column-gap: 24px; } }

/* ----------------------------------------------------------- syllabus */
.syllabus__totals { color: var(--muted); margin: 0; }
.syllabus__totals strong { color: var(--text); }
.syllabus { display: grid; gap: 10px; margin-bottom: 20px; }
.module { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.module[open] { border-color: var(--border-strong); box-shadow: var(--shadow); }
.module > summary, .faq__item > summary { list-style: none; cursor: pointer; }
.module > summary::-webkit-details-marker, .faq__item > summary::-webkit-details-marker { display: none; }
.module > summary {
  display: grid; grid-template-columns: 1fr auto; gap: 4px 16px; align-items: center;
  padding: 18px 20px; border-radius: var(--radius); min-height: 64px;
}
.module > summary:hover .module__title { color: var(--link); }
.module__label { grid-column: 1; font-family: var(--font-mono); font-size: .75rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-text); }
.module__title { grid-column: 1; font-family: var(--font-display); font-size: 1.28rem; font-weight: 600; line-height: 1.25; }
.module__meta { grid-column: 1; color: var(--muted); font-size: .92rem; }
.module__tags { grid-column: 1; display: flex; flex-wrap: wrap; gap: 6px; }
.module__tags:empty { display: none; }
.module__chev { grid-column: 2; grid-row: 1 / span 4; width: 32px; height: 32px; border-radius: 50%; border: 1px solid var(--border); position: relative; }
.module__chev::before { content: ""; position: absolute; left: 50%; top: 45%; width: 8px; height: 8px; border-right: 2px solid var(--text); border-bottom: 2px solid var(--text); transform: translate(-50%, -50%) rotate(45deg); }
@media (prefers-reduced-motion: no-preference) { .module__chev::before { transition: transform .2s; } }
details[open] > summary .module__chev::before { transform: translate(-50%, -20%) rotate(-135deg); }
@media (min-width: 760px) {
  .module > summary { grid-template-columns: 7.5rem minmax(0, 1fr) auto 12.5rem 32px; gap: 16px; }
  .module__label, .module__title, .module__meta, .module__tags, .module__chev { grid-column: auto; grid-row: auto; }
  .module__meta { white-space: nowrap; text-align: right; }
  .module__tags, .module__tags:empty { display: flex; justify-content: flex-end; }
}
.tag { display: inline-block; font-size: .78rem; font-weight: 600; padding: 3px 9px; border-radius: 999px; background: var(--surface-2); color: var(--text); border: 1px solid var(--border); }
.tag--accent { background: var(--accent-soft); color: var(--accent-text); border-color: transparent; }
.module__body { padding: 0 20px 20px; }
@media (min-width: 760px) { .module__body { padding-left: calc(20px + 7.5rem + 16px); } }
.module__summary { color: var(--muted); max-width: 70ch; font-size: 1rem; }
.lessons { list-style: none; counter-reset: l; border-top: 1px solid var(--border); }
.lesson { counter-increment: l; display: grid; grid-template-columns: 2rem minmax(0, 1fr) auto; column-gap: 12px; row-gap: 2px; padding: 12px 0; border-bottom: 1px solid var(--border); }
.lesson::before { content: counter(l, decimal-leading-zero); grid-row: 1; font-family: var(--font-mono); font-size: .85rem; color: var(--muted); padding-top: .15em; }
.lesson__title { grid-column: 2; font-weight: 500; }
.lesson__min { grid-column: 3; grid-row: 1; }
.lesson__summary { grid-column: 2 / -1; color: var(--muted); font-size: .92rem; line-height: 1.5; }
@media (max-width: 559px) { .lesson__summary { grid-column: 1 / -1; } }
.lesson__min { font-family: var(--font-mono); font-size: .85rem; color: var(--muted); white-space: nowrap; padding-top: .15em; }
.units { list-style: none; display: grid; gap: 8px; margin-top: 14px; }
.unit { display: flex; align-items: center; gap: 10px; font-weight: 500; font-size: .97rem; }
.unit .icon { color: var(--accent-text); width: 20px; height: 20px; }
.syllabus__resources { margin-bottom: .5em; }

/* -------------------------------------------------------------- method */
.method { display: grid; gap: 20px; }
@media (min-width: 860px) { .method { grid-template-columns: repeat(3, 1fr); gap: 32px; } }
.method__item { border-top: 3px solid var(--accent); padding-top: 20px; }
.method__item .icon { color: var(--brand); margin-bottom: 12px; }
.method__item h3 { font-size: 1.35rem; }
.method__item p { color: var(--muted); }
.case { margin-top: 48px; background: var(--surface-2); border-left: 4px solid var(--brand); border-radius: 0 var(--radius) var(--radius) 0; padding: 24px 28px; }
.case p:last-child { margin: 0; max-width: 80ch; }

/* ------------------------------------------------------------ features */
.features { display: grid; gap: 16px; margin-bottom: 48px; }
@media (min-width: 640px) { .features { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1020px) { .features { grid-template-columns: repeat(3, 1fr); } }
.feature { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.feature .icon { color: var(--accent-text); margin-bottom: 10px; }
.feature h3 { font-family: var(--font-body); font-size: 1.05rem; margin-bottom: .4em; }
.feature p { color: var(--muted); margin: 0; font-size: .97rem; }

.showcase { display: grid; gap: 20px; }
@media (min-width: 1020px) { .showcase { grid-template-columns: 1fr 1fr; } }
.showcase__item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; display: grid; gap: 24px; align-content: start; }
.showcase__item h3 { font-size: 1.5rem; }
.showcase__text p:last-child { margin: 0; color: var(--muted); }
.demo { margin: 0; background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; display: grid; gap: 12px; }
.demo figcaption { margin: 0; }
.demo__q { margin: 0; justify-self: end; max-width: 88%; background: var(--bubble); color: #fff; padding: 10px 14px; border-radius: 14px 14px 4px 14px; font-size: .97rem; }
.demo__a { background: var(--surface); border: 1px solid var(--border); border-radius: 14px 14px 14px 4px; padding: 14px; font-size: .97rem; max-width: 94%; }
.demo__a p:first-child { margin-bottom: .7em; }
.demo__cites { margin: 0; }
.cite { display: inline-block; font-size: .82rem; font-weight: 500; color: var(--accent-text); background: var(--accent-soft); border-radius: 4px; padding: 3px 8px; }
.demo--cert { background: var(--surface); border: 1px solid var(--border-strong); text-align: center; padding: 28px 20px; outline: 1px solid var(--border); outline-offset: -8px; }
.demo--cert p { margin: 0; }
.demo__cert-kicker { font-family: var(--font-mono); font-size: .75rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-text); }
.demo__cert-name { font-family: var(--font-display); font-size: 1.7rem; font-weight: 600; }
.demo__cert-course { font-weight: 600; }
.demo__cert-meta { color: var(--muted); font-size: .92rem; }
.demo__cert-code { font-family: var(--font-mono); font-size: .88rem; color: var(--muted); }
.demo__cert-code span { color: var(--text); letter-spacing: .08em; }

/* ------------------------------------------------------------ validity */
.validity { margin: 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 8px 24px; }
.validity div { display: grid; grid-template-columns: minmax(0, 11rem) 1fr; gap: 12px; padding: 14px 0; border-top: 1px solid var(--border); }
.validity div:first-child { border-top: 0; }
.validity dt { color: var(--muted); }
.validity dd { margin: 0; font-weight: 600; }

/* --------------------------------------------------------------- author */
.author { display: grid; gap: 24px; align-items: start; }
@media (min-width: 640px) { .author { grid-template-columns: 96px minmax(0, 68ch); gap: 32px; } }
.author__mark { width: 96px; height: 96px; border-radius: 50%; background: var(--hero-bg); color: #fff; display: grid; place-items: center; font-family: var(--font-display); font-size: 2.1rem; font-weight: 600; border: 3px solid var(--accent); }
.author h2 { margin-bottom: .15em; }
.author p:last-child { max-width: 64ch; margin: 0; }

/* ------------------------------------------------------------------ faq */
.faq { border-top: 1px solid var(--border); }
.faq__item { border-bottom: 1px solid var(--border); }
.faq__item > summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 0; min-height: 56px; }
.faq__item > summary h3 { font-family: var(--font-body); font-size: 1.1rem; font-weight: 600; margin: 0; }
.faq__item > summary:hover h3 { color: var(--link); }
.faq__item .module__chev { flex: none; }
.faq__a { padding: 0 48px 20px 0; color: var(--muted); }
.faq__a p { margin: 0; max-width: 70ch; }

/* ------------------------------------------------------------- cta band */
.cta-band { background: linear-gradient(160deg, var(--hero-bg) 0%, var(--hero-bg-2) 100%); color: var(--hero-text); padding: 64px 0; }
.cta-band__inner { display: grid; gap: 28px; align-items: center; }
@media (min-width: 980px) { .cta-band__inner { grid-template-columns: 1fr auto; } }
.cta-band h2 { color: #fff; }
.cta-band p { color: var(--hero-muted); margin: 0; max-width: 52ch; }

/* -------------------------------------------------------------- catalog */
.catalog { display: grid; gap: 24px; }
.course-card { display: grid; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
@media (min-width: 820px) { .course-card { grid-template-columns: 340px 1fr; } }
.course-card__cover { background: linear-gradient(160deg, #0a2350, #071a3d); color: #fff; padding: 28px; display: flex; flex-direction: column; gap: 10px; min-height: 220px; border-left: 6px solid #f2b44c; }
.course-card__kicker { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: #f2b44c; }
.course-card__ctitle { font-family: var(--font-display); font-size: 1.9rem; font-weight: 600; line-height: 1.1; margin-top: auto; }
.course-card__csub { color: #c4d0e6; font-size: .95rem; }
.course-card__body { padding: 28px; }
.course-card__title { font-size: 1.7rem; margin-bottom: .2em; }
.course-card__title a { color: var(--text); text-decoration: none; }
.course-card__title a:hover { color: var(--link); text-decoration: underline; }
.course-card__sub { color: var(--muted); }
.course-card__meta { font-family: var(--font-mono); font-size: .85rem; color: var(--muted); }

/* --------------------------------------------------------------- verify */
.section--verify { min-height: 60vh; }
.verify-form { margin: 28px 0 32px; }
.verify-form label { display: block; font-weight: 600; margin-bottom: 8px; }
.verify-form__row { display: flex; flex-wrap: wrap; gap: 10px; }
.verify-form input {
  flex: 1 1 220px; min-width: 0; min-height: 48px; padding: 10px 14px;
  font: 500 1.15rem/1.2 var(--font-mono); letter-spacing: .08em; text-transform: uppercase;
  color: var(--text); background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
}
.verify-form input::placeholder { color: var(--muted); opacity: 1; letter-spacing: .02em; text-transform: none; font-family: var(--font-body); font-size: 1rem; }
.verify-form input[aria-invalid="true"] { border-color: var(--bad); }
.verify-form p { margin: 8px 0 0; }
.field-error { color: var(--bad); font-weight: 500; }
.verdict { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); padding: 24px; border-left-width: 6px; }
.verdict__head { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.verdict__title { margin: 0; font-size: 1.6rem; }
.verdict__badge { width: 28px; height: 28px; border-radius: 50%; flex: none; position: relative; background: var(--surface-2); }
.verdict--valid { border-left-color: var(--ok); }
.verdict--valid .verdict__badge { background: var(--ok); }
.verdict--valid .verdict__badge::after { content: ""; position: absolute; left: 9px; top: 6px; width: 7px; height: 12px; border-right: 3px solid var(--surface); border-bottom: 3px solid var(--surface); transform: rotate(45deg); }
.verdict--revoked { border-left-color: var(--bad); background: var(--bad-soft); }
.verdict--revoked .verdict__badge, .verdict--notfound .verdict__badge { background: var(--bad); }
.verdict--revoked .verdict__badge::after, .verdict--notfound .verdict__badge::after,
.verdict--revoked .verdict__badge::before, .verdict--notfound .verdict__badge::before { content: ""; position: absolute; left: 13px; top: 6px; width: 3px; height: 16px; background: var(--surface); transform: rotate(45deg); }
.verdict--revoked .verdict__badge::before, .verdict--notfound .verdict__badge::before { transform: rotate(-45deg); }
.verdict--notfound { border-left-color: var(--bad); }
.verdict--error { border-left-color: var(--warn); background: var(--warn-soft); }
.verdict--error .verdict__badge { background: var(--warn); }
.verdict--error .verdict__badge::after { content: "!"; position: absolute; inset: 0; display: grid; place-items: center; font-weight: 700; color: var(--surface); }
.verdict--loading .verdict__badge { border: 3px solid var(--border-strong); border-top-color: var(--link); background: transparent; }
@media (prefers-reduced-motion: no-preference) { .verdict--loading .verdict__badge { animation: spin 1s linear infinite; } }
@keyframes spin { to { transform: rotate(360deg); } }
.verdict__lead { margin: 4px 0 16px; }
.verdict__data { margin: 0; border-top: 1px solid var(--border); }
.verdict__data div { display: grid; grid-template-columns: minmax(0, 8rem) 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.verdict__data dt { color: var(--muted); }
.verdict__data dd { margin: 0; font-weight: 600; }
.notice--error { color: var(--bad); }

/* --------------------------------------------------------------- footer */
.site-footer { border-top: 1px solid var(--border); background: var(--surface); padding: 40px 0; }
.site-footer__inner { display: grid; gap: 20px; }
@media (min-width: 760px) { .site-footer__inner { grid-template-columns: 1fr auto; } .site-footer__legal { grid-column: 1 / -1; } }
.site-footer p { margin: 0; }
.brand--footer { margin-bottom: 6px; }
.site-footer__links { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 20px; align-items: center; }
.site-footer__links a { display: inline-block; padding: 8px 0; }

@media print {
  .site-header, .cta-group, .cta-band, .theme-toggle { display: none !important; }
  .hero { background: none; color: #000; }
  details.module { break-inside: avoid; }
}