body {
  min-height: 100vh;
  background:
    radial-gradient(circle at 13% 20%, rgba(200, 244, 91, .34) 0 9%, transparent 9.2%),
    linear-gradient(rgba(25, 25, 19, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(25, 25, 19, .04) 1px, transparent 1px),
    var(--paper);
  background-size: auto, 26px 26px, 26px 26px, auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 72px;
  padding: 12px clamp(18px, 4vw, 56px);
  border-bottom: 2px solid var(--ink);
  background: rgba(243, 240, 230, .94);
  backdrop-filter: blur(12px);
}

.site-brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 950; letter-spacing: -.04em; text-decoration: none; }
.site-brand__mark { display: grid; place-items: center; width: 38px; height: 38px; border: 2px solid var(--ink); border-radius: 10px; background: var(--orange); box-shadow: 3px 3px 0 var(--ink); font: 900 18px var(--mono); }
.site-nav { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.site-nav a { padding: 8px 11px; border-radius: 8px; color: var(--muted); font-size: 14px; font-weight: 800; text-decoration: none; }
.site-nav a:hover { color: var(--ink); background: var(--paper-muted); }
.header-note { padding-left: 16px; border-left: 2px solid var(--ink); font: 700 11px var(--mono); letter-spacing: .08em; text-transform: uppercase; }

.portal-main { width: min(1440px, 100%); margin: 0 auto; padding: 0 clamp(20px, 5vw, 76px) 56px; }
.portal-hero { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(320px, .88fr); gap: clamp(38px, 7vw, 108px); align-items: center; min-width: 0; min-height: 570px; padding: 70px 0 54px; }
.portal-hero > * { min-width: 0; }
.portal-kicker { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 18px; font: 800 12px var(--mono); letter-spacing: .14em; text-transform: uppercase; }
.portal-kicker::before { content: ""; width: 30px; height: 9px; border: 2px solid var(--ink); border-radius: 99px; background: var(--orange); }
.portal-hero h1 { max-width: 850px; margin: 0; font-size: clamp(62px, 8vw, 122px); line-height: .84; letter-spacing: -.075em; }
.portal-hero h1 span { display: block; color: var(--paper); -webkit-text-stroke: 2px var(--ink); text-shadow: 5px 5px 0 var(--lime); }
.portal-lede { max-width: 700px; margin: 30px 0; color: #414139; font-size: clamp(18px, 1.45vw, 21px); }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 50px; padding: 11px 19px; border: 2px solid var(--ink); border-radius: 10px; background: var(--ink); color: white; box-shadow: 4px 4px 0 var(--orange); font-weight: 900; text-decoration: none; transition: transform .15s, box-shadow .15s; }
.button:hover { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--orange); }
.button--light { background: var(--paper-raised); color: var(--ink); box-shadow: none; }

.hero-board { position: relative; width: 100%; min-width: 0; min-height: 390px; }
.hero-board::before { content: ""; position: absolute; inset: 20px -14px -12px 24px; border: 2px solid var(--ink); border-radius: 24px; background: var(--orange); transform: rotate(3deg); }
.board-card { position: relative; min-height: 360px; padding: 26px; border: 2px solid var(--ink); border-radius: 20px; background: var(--paper-raised); box-shadow: 9px 10px 0 var(--ink); transform: rotate(-1.5deg); }
.board-label { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding-bottom: 18px; border-bottom: 2px solid var(--ink); font: 800 11px var(--mono); letter-spacing: .11em; text-transform: uppercase; }
.status-dot { display: inline-flex; align-items: center; gap: 7px; }
.status-dot::before { content: ""; width: 10px; height: 10px; border: 1.5px solid var(--ink); border-radius: 50%; background: var(--lime); }
.board-stack { display: grid; gap: 12px; margin-top: 22px; }
.board-row { display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 13px; padding: 13px; border: 2px solid var(--ink); border-radius: 11px; background: var(--paper); }
.board-row:nth-child(2) { margin-left: 24px; background: #dce7ff; }
.board-row:nth-child(3) { margin-left: 48px; background: var(--lime); }
.board-row b { display: grid; place-items: center; width: 40px; height: 40px; border: 2px solid var(--ink); border-radius: 9px; background: var(--ink); color: white; font-family: var(--mono); }
.board-row span { font-weight: 850; }
.board-row small { color: var(--muted); font: 700 10px var(--mono); }

.course-discovery { scroll-margin-top: 94px; display: grid; grid-template-columns: minmax(0, .8fr) minmax(520px, 1.2fr); gap: clamp(28px, 5vw, 72px); align-items: center; padding: 48px 0; border-top: 2px solid var(--ink); }
.course-discovery__intro h2 { margin: 0; font-size: clamp(40px, 5vw, 70px); line-height: .95; letter-spacing: -.06em; }
.course-discovery__intro p { max-width: 480px; margin: 18px 0 0; color: var(--muted); }
.library { padding: 48px 0 72px; border-top: 2px solid var(--ink); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 28px; }
.section-head h2 { margin: 0; font-size: clamp(40px, 5vw, 70px); line-height: .95; letter-spacing: -.06em; }
.section-head p { max-width: 470px; margin: 0; color: var(--muted); }
.catalog-filter { min-width: 0; padding: 18px; border: 2px solid var(--ink); border-radius: 16px; background: var(--paper-raised); box-shadow: 4px 4px 0 var(--ink); }
.catalog-filter__heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 13px; font: 850 11px var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.catalog-filter__heading span:last-child { display: grid; place-items: center; width: 26px; height: 26px; border: 1.5px solid var(--ink); border-radius: 7px; background: var(--lime); font-size: 14px; }
.catalog-search { margin-bottom: 16px; }
.catalog-search label, .catalog-filter__label { display: block; margin-bottom: 7px; color: var(--muted); font: 750 10px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.catalog-search__field { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 10px; min-height: 52px; padding: 6px 7px 6px 14px; border: 2px solid var(--ink); border-radius: 11px; background: var(--paper); transition: box-shadow .15s, transform .15s; }
.catalog-search__field:focus-within { box-shadow: 4px 4px 0 var(--orange); transform: translate(-1px, -1px); }
.catalog-search__field > span { font: 900 20px var(--mono); }
.catalog-search__field input { width: 100%; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--ink); font: 750 15px var(--body); }
.catalog-search__field input::placeholder { color: #77766d; opacity: 1; }
.catalog-search__field input::-webkit-search-cancel-button { display: none; }
.catalog-search__field button { min-height: 36px; padding: 6px 10px; border: 1.5px solid var(--ink); border-radius: 8px; background: var(--paper-raised); color: var(--ink); font: 800 10px var(--mono); text-transform: uppercase; cursor: pointer; }
.catalog-search__field button:hover { background: var(--lime); }
.catalog-search__field button[hidden] { display: none; }
.course-filters { display: flex; flex-wrap: wrap; gap: 9px; }
.course-filter { display: inline-flex; align-items: center; gap: 9px; min-height: 42px; padding: 8px 10px 8px 13px; border: 2px solid var(--ink); border-radius: 10px; background: var(--paper); color: var(--ink); font-size: 13px; font-weight: 850; cursor: pointer; transition: transform .15s, box-shadow .15s, background .15s; }
.course-filter:hover { transform: translateY(-2px); box-shadow: 3px 3px 0 var(--ink); }
.course-filter.active { background: var(--ink); color: white; box-shadow: 3px 3px 0 var(--orange); }
.course-filter b { display: grid; place-items: center; min-width: 24px; height: 24px; padding: 0 6px; border: 1.5px solid currentColor; border-radius: 7px; font: 800 10px var(--mono); }
.catalog-filter__status { margin: 13px 0 0; color: var(--muted); font: 700 11px var(--mono); }
.course-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.course-card { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) 180px; min-height: 390px; border: 2px solid var(--ink); border-radius: 18px; background: var(--paper-raised); box-shadow: var(--shadow-md); overflow: hidden; }
.course-card[hidden] { display: none; }
.course-card__body { display: flex; flex-direction: column; padding: clamp(24px, 4vw, 42px); }
.course-card__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: auto; }
.tag { padding: 5px 9px; border: 1.5px solid var(--ink); border-radius: 999px; background: var(--paper); font: 750 10px var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.tag--live { background: var(--lime); }
.tag--free { background: #dce7ff; }
.tag--premium { background: #ffd151; }
.tag--pro { background: var(--orange); }
.tag--locked { background: var(--paper-muted); }
.course-card--locked .course-card__art { background: var(--paper-muted); }
.course-card--locked .terminal-glyph { color: var(--paper-muted); }
.course-card h3 { margin: 28px 0 10px; font-size: clamp(34px, 4vw, 58px); line-height: .94; letter-spacing: -.055em; }
.course-card__description { max-width: 630px; margin: 0 0 24px; color: #4b4a42; }
.course-card__topics { display: flex; flex-wrap: wrap; gap: 7px; margin: -7px 0 20px; }
.course-topic { display: inline-flex; align-items: center; gap: 2px; padding: 4px 7px; border: 1px solid var(--ink); border-radius: 6px; background: #fff8d9; color: #49483f; font: 750 10px var(--mono); }
.course-topic::before { content: "#"; color: #9d3e26; font-weight: 950; }
.course-meta { display: flex; flex-wrap: wrap; gap: 16px; color: var(--muted); font: 700 11px var(--mono); text-transform: uppercase; }
.course-progress { margin: 24px 0 20px; }
.course-progress__label { display: flex; justify-content: space-between; margin-bottom: 7px; font: 750 11px var(--mono); }
.course-progress__track { height: 11px; border: 2px solid var(--ink); border-radius: 99px; background: var(--paper); overflow: hidden; }
.course-progress__fill { height: 100%; background: var(--lime); }
.course-card__art { display: grid; place-items: center; border-left: 2px solid var(--ink); background: var(--orange); }
.terminal-glyph { display: grid; place-items: center; width: 132px; aspect-ratio: 1; border: 3px solid var(--ink); border-radius: 28px; background: #171916; color: var(--lime); box-shadow: 8px 8px 0 var(--ink); font: 900 34px var(--mono); transform: rotate(4deg); }

.catalog-empty { display: flex; grid-column: 1 / -1; align-items: center; gap: 18px; min-height: 150px; padding: 26px; border: 2px dashed var(--ink); border-radius: 18px; background: #fff8d9; }
.catalog-empty[hidden] { display: none; }
.catalog-empty > span { display: grid; flex: 0 0 auto; place-items: center; width: 52px; height: 52px; border: 2px solid var(--ink); border-radius: 13px; background: var(--orange); font: 900 24px var(--mono); }
.catalog-empty h3 { margin: 0 0 5px; font-size: 24px; letter-spacing: -.03em; }
.catalog-empty p { margin: 0; color: var(--muted); }

.add-card { display: flex; grid-column: 1 / -1; flex-direction: row; align-items: center; justify-content: space-between; gap: 32px; min-height: 190px; padding: 30px; border: 2px dashed var(--ink); border-radius: 18px; background: rgba(255, 253, 246, .55); }
.add-card__icon { display: grid; place-items: center; width: 54px; height: 54px; border: 2px solid var(--ink); border-radius: 50%; background: #dce7ff; font-size: 28px; }
.add-card h3 { margin: 0 0 8px; font-size: 26px; line-height: 1; letter-spacing: -.04em; }
.add-card p { margin: 0; color: var(--muted); font-size: 14px; }
.add-card code { display: inline-block; margin-top: 20px; padding: 7px 9px; border-radius: 7px; background: var(--ink); color: var(--lime); font: 11px var(--mono); }

.portal-footer { display: flex; justify-content: space-between; gap: 20px; padding: 28px 0 8px; border-top: 2px solid var(--ink); color: var(--muted); font: 11px var(--mono); }

@media (max-width: 980px) {
  .portal-hero { grid-template-columns: 1fr; padding-top: 54px; }
  .hero-board { max-width: 700px; }
  .course-discovery { grid-template-columns: 1fr; }
  .course-grid { grid-template-columns: 1fr; }
  .add-card { grid-column: auto; min-height: 230px; }
}

@media (max-width: 680px) {
  .site-header { min-height: 64px; }
  .site-brand span:last-child, .header-note, .site-nav a:last-child { display: none; }
  .portal-main { padding-inline: 18px; }
  .portal-hero { min-height: auto; padding-top: 42px; }
  .hero-board { max-width: calc(100vw - 52px); margin-inline: auto; }
  .portal-hero h1 { font-size: clamp(54px, 18vw, 82px); }
  .board-card { min-height: 330px; padding: 18px; }
  .board-row:nth-child(2), .board-row:nth-child(3) { margin-left: 0; }
  .course-discovery { padding: 38px 0; }
  .section-head { display: block; }
  .section-head p { margin-top: 14px; }
  .catalog-filter { padding: 15px; }
  .catalog-search__field { min-height: 50px; }
  .course-filters { flex-wrap: nowrap; margin-inline: -15px; padding: 2px 15px 6px; overflow-x: auto; scrollbar-width: thin; }
  .course-filter { flex: 0 0 auto; }
  .course-card { grid-template-columns: 1fr; }
  .course-card__art { min-height: 190px; border-top: 2px solid var(--ink); border-left: 0; }
  .add-card { align-items: flex-start; flex-direction: column; }
  .portal-footer { flex-direction: column; }
}