:root {
  --bg: #0f1115;
  --bg-soft: #171a21;
  --card: #1d212b;
  --card-hover: #262c3a;
  --border: #3a4258;
  --text: #f0f2f7;
  --text-dim: #c0c7d6;
  --text-faint: #99a1b5;
  --accent: #ff6b4a;
  --accent-soft: #ff6b4a22;
  --weekend: #4ade80;
  --week12: #fbbf24;
  --multi: #f87171;
  --implemented: #60a5fa;
  --research: #a78bfa;
  --research-soft: #a78bfa22;
  --radius: 14px;
  --maxw: 1100px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Buttons don't inherit font or color by default — make them, so button-based
   cards render their text in the page's font/color instead of the UA default. */
button { font-family: inherit; font-size: inherit; line-height: inherit; color: inherit; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

.footer {
  margin-top: 48px;
  padding-bottom: 40px;
  color: var(--text-dim);
  font-size: 14px;
  overflow-wrap: anywhere;
}
/* Divider inside .wrap's padding, so it lines up with the content. */
.footer::before {
  content: "";
  display: block;
  border-top: 1px solid var(--border);
  margin-bottom: 20px;
}
.footer p { margin: 0 0 8px; }

/* ---- Hero ---- */
.hero {
  background: radial-gradient(120% 140% at 50% 0%, #20242f 0%, var(--bg) 60%);
  border-bottom: 1px solid var(--border);
  padding: 56px 0 40px;
}
.hero__title { font-size: 2.6rem; margin: 0 0 10px; letter-spacing: -0.02em; }
.hero__tagline { font-size: 1.2rem; color: var(--text); margin: 0 0 18px; font-weight: 500; }
.hero__desc { font-size: 1rem; color: var(--text-dim); max-width: 760px; margin: 0 0 18px; }
.hero__meta { font-size: 0.85rem; color: var(--text-faint); margin: 0; }

/* ---- Sections ---- */
.section { margin: 44px 0; }
.section__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
  margin-bottom: 22px;
}
.section__peppers { font-size: 1.5rem; line-height: 1; }
.section__title { font-size: 1.5rem; margin: 0; letter-spacing: -0.01em; }
.section__count {
  font-size: 0.8rem;
  color: var(--text-faint);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 10px;
}
.section__blurb { width: 100%; color: var(--text-dim); font-size: 0.95rem; margin: 4px 0 0; }

.section[data-tier="weekend"] .section__title { color: var(--weekend); }
.section[data-tier="1-2-weeks"] .section__title { color: var(--week12); }
.section[data-tier="multi-week"] .section__title { color: var(--multi); }
.section[data-tier="implemented"] .section__title { color: var(--implemented); }
.section[data-tier="research"] .section__title { color: var(--research); }

/* Research cards get a subtle purple border tint */
.section[data-tier="research"] .card {
  border-color: #3d3558;
}
.section[data-tier="research"] .card:hover {
  border-color: var(--research);
}

/* ---- Cards ---- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.card {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 18px 16px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: left;
}
.card:hover {
  background: var(--card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
}
.card__top { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.card__title { font-size: 1.1rem; font-weight: 700; margin: 0; color: var(--text); }
.card__peppers { font-size: 1rem; flex-shrink: 0; }
.card__summary { color: var(--text-dim); font-size: 0.92rem; margin: 0; }
.card__foot { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: auto; }
.tag {
  font-size: 0.72rem;
  color: var(--text-faint);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 9px;
}
.tag--date { color: var(--text-faint); }
.tag--live { color: var(--implemented); border-color: var(--implemented); }

/* ---- Fold / show more ---- */
.fold-btn {
  margin-top: 18px;
  background: var(--bg-soft);
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.fold-btn:hover { background: var(--card-hover); color: var(--text); border-color: var(--accent); }
.hidden { display: none !important; }

.empty {
  color: var(--text-faint);
  font-style: italic;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 18px;
}

/* ---- Modal ---- */
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 50;
}
.modal[hidden] { display: none; }
.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 7, 12, 0.7);
  backdrop-filter: blur(3px);
}
.modal__panel {
  position: relative;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  max-width: 720px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  padding: 30px;
}
.modal__close {
  position: absolute;
  top: 14px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-faint);
  font-size: 1.8rem;
  line-height: 1;
  cursor: pointer;
}
.modal__close:hover { color: var(--text); }

.detail__peppers { font-size: 1.3rem; }
.detail__title { font-size: 1.7rem; margin: 6px 0 12px; letter-spacing: -0.01em; }
.detail__tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.detail h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin: 22px 0 8px;
}
.detail p { color: var(--text); margin: 0 0 6px; }
.detail ul { margin: 0; padding-left: 20px; color: var(--text); }
.detail li { margin-bottom: 5px; }
.detail .inspired { color: var(--text-dim); font-size: 0.9rem; }
.detail__links { margin-top: 22px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn-link {
  display: inline-block;
  background: var(--accent);
  color: #2a1206; /* dark text on orange: white-on-orange is too low contrast */
  padding: 9px 16px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.9rem;
}
.btn-link:hover { text-decoration: none; opacity: 0.92; }
.btn-link--ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }

/* ---- Research modal detail ---- */
.detail--research .detail h3 { color: var(--research); }

.research-paper {
  background: var(--bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--research);
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 12px;
}
.research-paper__title { font-weight: 700; font-size: 0.95rem; color: var(--text); margin-bottom: 3px; }
.research-paper__meta { font-size: 0.8rem; color: var(--text-faint); margin-bottom: 6px; }
.research-paper__abstract { font-size: 0.88rem; color: var(--text-dim); margin: 6px 0; }
.research-paper__relevance { font-size: 0.85rem; color: var(--research); margin: 4px 0 0; font-style: italic; }
.research-paper__doi { font-size: 0.8rem; color: var(--research); margin-top: 6px; display: inline-block; }
.research-paper__doi:hover { text-decoration: underline; }

.research-refs { display: flex; flex-direction: column; gap: 8px; }
.research-ref {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
}
.research-ref__title { font-weight: 600; font-size: 0.9rem; color: var(--text); }
.research-ref__meta { font-size: 0.78rem; color: var(--text-faint); margin: 2px 0 4px; }
.research-ref__relevance { font-size: 0.84rem; color: var(--text-dim); margin: 0; }

.research-plan { display: flex; flex-direction: column; gap: 10px; }
.research-plan__overview { color: var(--text); margin: 0; }
.research-plan__milestones { margin: 0; padding-left: 20px; color: var(--text); }
.research-plan__milestones li { margin-bottom: 6px; font-size: 0.9rem; }
.research-plan__venues { font-size: 0.9rem; color: var(--text-dim); margin: 0; }
.research-plan__resources { font-size: 0.9rem; color: var(--text-dim); margin: 0; }
.research-plan__risks { margin: 4px 0 0 18px; font-size: 0.88rem; color: var(--text-dim); }
.research-plan__irb {
  font-size: 0.85rem;
  color: var(--text-faint);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  margin: 0;
}

/* ---- Commercial idea detail ---- */
.tag--score { color: var(--accent); border-color: var(--accent); }
.tag--review { color: var(--weekend); border-color: var(--weekend); }
.tag--provisional { color: var(--week12); border-color: var(--week12); }
.tag--kind { color: var(--text-faint); font-size: 0.72rem; text-transform: lowercase; }

/* Provisional ideas state their shortfall up front, next to the scores. */
.gap-panel {
  border: 1px solid var(--week12);
  border-radius: var(--radius);
  background: #fbbf2411;
  padding: 0.9rem 1.1rem;
  margin-bottom: 1.2rem;
}
.gap-panel__head { margin: 0 0 0.5rem; font-weight: 600; color: var(--week12); }
.gap-panel .sublabel { margin-top: 0.7rem; }
.gap-panel ul, .gap-panel p:last-child { margin-bottom: 0; }

.score-panel {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 6px;
}
.score-panel__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.score-total { display: flex; align-items: baseline; gap: 6px; }
.score-total__num { font-size: 2rem; font-weight: 800; color: var(--accent); line-height: 1; }
.score-total__of { font-size: 0.85rem; color: var(--text-faint); }
.score-panel__rows { display: flex; flex-direction: column; gap: 8px; }
.score-row { display: grid; grid-template-columns: 9.5rem 1fr 2.5rem; align-items: center; gap: 10px; }
.score-row__label { font-size: 0.85rem; color: var(--text); }
.score-row__bar { height: 6px; background: var(--card-hover); border-radius: 999px; overflow: hidden; }
.score-row__fill { display: block; height: 100%; background: var(--accent); border-radius: 999px; }
.score-row__val { font-size: 0.8rem; color: var(--text-faint); text-align: right; font-variant-numeric: tabular-nums; }
.detail .score-item__why { font-size: 0.8rem; color: var(--text-faint); margin: 2px 0 0; overflow-wrap: anywhere; }

.detail .problem {
  border-left: 3px solid var(--accent);
  padding-left: 12px;
  color: var(--text-dim);
  font-style: italic;
}

.deflist { display: grid; grid-template-columns: 9.5rem 1fr; gap: 6px 14px; margin: 0; }
.deflist dt { font-size: 0.82rem; color: var(--text-faint); padding-top: 2px; }
.deflist dd { margin: 0; color: var(--text); font-size: 0.92rem; }

.stack { display: flex; flex-direction: column; gap: 8px; }
.item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
}
.item__head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.item__title { font-weight: 600; font-size: 0.92rem; }
.item__meta { display: flex; gap: 10px; flex-wrap: wrap; font-size: 0.8rem; color: var(--text-faint); }
.detail .item__body { font-size: 0.88rem; color: var(--text-dim); margin: 4px 0 0; }
.detail .sublabel { font-size: 0.78rem; color: var(--text-faint); margin: 6px 0 2px; text-transform: uppercase; letter-spacing: 0.05em; }
.detail .dim, .detail ul.dim { color: var(--text-dim); }

@media (max-width: 560px) {
  .score-row { grid-template-columns: 7.5rem 1fr 2.2rem; }
  .deflist { grid-template-columns: 1fr; gap: 2px; }
  .deflist dd { margin-bottom: 8px; }
}

@media (max-width: 560px) {
  .hero__title { font-size: 2rem; }
  .modal__panel { padding: 24px 20px; }
}

/* ---------------------------------------------------------------------------
   Navigation, browse and topics (added 2026-11-01)
   The archive outgrew a single scrolling page: 601 ideas, 167 in one tier.
   These are the three views plus the controls that make them navigable.
   --------------------------------------------------------------------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 20px;
}
.nav__brand { font-weight: 600; color: var(--text); text-decoration: none; white-space: nowrap; }
.nav__links { display: flex; gap: 4px; flex-wrap: wrap; }
.nav__links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
}
.nav__links a:hover { color: var(--text); background: var(--bg-soft); }
.nav__links a.is-current { color: var(--accent); border-color: var(--accent); }

.hero__cta { margin-top: 18px; display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 10px;
  padding: 10px 18px;
  font-size: 0.92rem;
  font-weight: 500;
}
.btn:hover { opacity: 0.92; }
.btn--ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }

/* Tier jump bar: a long page needs a way between sections. */
.jumpbar {
  position: sticky;
  top: 45px;
  z-index: 30;
  background: color-mix(in srgb, var(--bg-soft) 94%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}
.jumpbar__inner {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 8px 20px;
  scrollbar-width: none;
}
.jumpbar__inner::-webkit-scrollbar { display: none; }
.jumpbar__link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.82rem;
  white-space: nowrap;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.jumpbar__link:hover { color: var(--text); border-color: var(--accent); }
.jumpbar__link--top { margin-left: auto; }

/* The collapse control belongs in the section head, where it is reachable
   without scrolling past every expanded card. */
.section__toggle {
  margin-left: auto;
  background: transparent;
  color: var(--text-faint);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 0.78rem;
  cursor: pointer;
}
.section__toggle:hover { color: var(--text); border-color: var(--accent); }
.section__foot { margin-top: 18px; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.section__foot .fold-btn { margin-top: 0; }
.fold-link { color: var(--accent); text-decoration: none; font-size: 0.88rem; }
.fold-link:hover { text-decoration: underline; }

.pagehead { padding: 34px 20px 10px; }
.pagehead__title { font-size: 1.9rem; margin: 0 0 6px; }
.pagehead__sub { color: var(--text-dim); margin: 0; }

.controls { border-bottom: 1px solid var(--border); padding: 14px 0 16px; margin-bottom: 24px; }
.search { position: relative; max-width: 560px; }
.search__input {
  width: 100%;
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 38px 11px 14px;
  font-size: 0.95rem;
  font-family: inherit;
}
.search__input:focus { outline: none; border-color: var(--accent); }
.search__clear {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-faint);
  font-size: 1.3rem;
  cursor: pointer;
  line-height: 1;
  padding: 0 6px;
}
.search__clear:hover { color: var(--text); }

.filters { margin-top: 14px; display: flex; flex-direction: column; gap: 8px; }
.filterrow { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.filterrow__label {
  color: var(--text-faint);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  min-width: 56px;
}
.chip {
  background: var(--bg-soft);
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 0.82rem;
  font-family: inherit;
  cursor: pointer;
}
.chip:hover { color: var(--text); border-color: var(--accent); }
.chip.is-on { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }

.controls__meta {
  margin: 14px 0 0;
  color: var(--text-faint);
  font-size: 0.86rem;
  display: flex;
  gap: 14px;
  align-items: baseline;
  flex-wrap: wrap;
}
.link-btn {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 0.86rem;
  font-family: inherit;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
}

.pager { margin: 28px 0 10px; display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.pager__btn {
  background: var(--bg-soft);
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 13px;
  font-size: 0.86rem;
  font-family: inherit;
  cursor: pointer;
  min-width: 40px;
}
.pager__btn:hover:not(:disabled) { color: var(--text); border-color: var(--accent); }
.pager__btn:disabled { opacity: 0.4; cursor: default; }
.pager__btn.is-current { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.pager__gap { color: var(--text-faint); padding: 0 2px; }

.topicgrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 14px;
  margin: 10px 0 30px;
}
.topiccard {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
}
.topiccard:hover { background: var(--card-hover); border-color: var(--accent); transform: translateY(-2px); }
.topiccard__count { font-size: 1.6rem; font-weight: 700; color: var(--accent); min-width: 2.2ch; }
.topiccard__name { color: var(--text); font-weight: 500; line-height: 1.3; }

.tag--topic { color: var(--text-dim); border-color: var(--text-faint); }

@media (max-width: 620px) {
  .nav__inner { flex-direction: column; align-items: flex-start; gap: 8px; }
  .jumpbar { top: 92px; }
  .pagehead__title { font-size: 1.5rem; }
  .filterrow__label { min-width: 0; width: 100%; }
}