/* ==========================================================================
   AI Stack Jobs — "precision ledger" theme
   信頼感第一の求人ボード。紙の台帳のような静かな精密さ + evergreen の検証色。
   ========================================================================== */

:root {
  --paper: #f7f5ef;
  --paper-raised: #fffdf8;
  --ink: #1d2521;
  --ink-soft: #4c564f;
  --ink-faint: #79837b;
  --line: rgba(29, 37, 33, 0.16);
  --line-soft: rgba(29, 37, 33, 0.09);
  --green: #0e6b4a;
  --green-deep: #0a523a;
  --green-tint: #e6f0e9;
  --amber: #9a6a1c;
  --amber-tint: #f6ecd9;
  --serif: "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans: "Public Sans", -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --radius: 8px;
  --pad: clamp(16px, 4vw, 32px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(14, 107, 74, 0.045), rgba(14, 107, 74, 0) 320px),
    var(--paper);
  border-top: 4px solid var(--green);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: inherit; }
a:hover { color: var(--green-deep); }

::selection { background: var(--green); color: var(--paper-raised); }

.wrap {
  width: 100%;
  max-width: 1060px;
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

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

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper-raised) 62%, transparent);
  backdrop-filter: blur(6px);
}

.site-header .wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 18px;
  padding-bottom: 16px;
}

.brand {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.015em;
  text-decoration: none;
  white-space: nowrap;
}

.brand .tld {
  color: var(--green);
  font-style: italic;
}

.brand-dot {
  display: inline-block;
  width: 0.5em;
  height: 0.5em;
  background: var(--green);
  border-radius: 2px;
  margin-right: 0.45em;
  transform: rotate(45deg) translateY(-1px);
}

.site-nav {
  display: flex;
  gap: clamp(0.9rem, 2.5vw, 1.75rem);
  flex-wrap: wrap;
}

.site-nav a {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-soft);
  padding: 2px 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--green-deep);
  border-bottom-color: var(--green);
}

/* --------------------------------------------------------------------------
   Hero (index)
   -------------------------------------------------------------------------- */
.hero {
  padding: clamp(2.4rem, 7vw, 4.5rem) 0 clamp(1.6rem, 4vw, 2.6rem);
}

.hero h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2rem, 5.4vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 21ch;
}

.hero h1 em {
  font-style: italic;
  color: var(--green-deep);
}

.hero .lede {
  margin-top: 1rem;
  max-width: 58ch;
  color: var(--ink-soft);
}

.statline {
  display: flex;
  gap: 1.4rem;
  flex-wrap: wrap;
  margin-top: 1.6rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.statline .stat { display: flex; align-items: baseline; gap: 0.45em; }

.statline .stat b {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--ink);
}

/* --------------------------------------------------------------------------
   Filters
   -------------------------------------------------------------------------- */
.filters {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  display: grid;
  grid-template-columns: 1.4fr 1fr auto;
  gap: 10px 14px;
  align-items: center;
  box-shadow: 0 1px 0 rgba(29, 37, 33, 0.05), 0 12px 28px -22px rgba(29, 37, 33, 0.35);
  position: sticky;
  top: 10px;
  z-index: 5;
}

.filters input[type="search"],
.filters input[type="text"] {
  font-family: var(--mono);
  font-size: 0.86rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 9px 12px;
  width: 100%;
}

.filters input:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 1px;
}

.filters .checks {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.filters label.check {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  cursor: pointer;
  white-space: nowrap;
}

.filters input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--green);
}

.result-count {
  grid-column: 1 / -1;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

@media (max-width: 720px) {
  .filters { grid-template-columns: 1fr; position: static; }
}

/* --------------------------------------------------------------------------
   Job list (ledger rows)
   -------------------------------------------------------------------------- */
.job-list {
  list-style: none;
  margin: 1.4rem 0 3rem;
  border-top: 1px solid var(--line);
}

.job-row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) minmax(0, 220px) auto;
  gap: 4px 18px;
  align-items: baseline;
  padding: 14px 10px;
  border-bottom: 1px solid var(--line-soft);
  position: relative;
  transition: background-color 120ms ease;
}

.job-row:hover { background: var(--paper-raised); }

.job-date {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.job-title-cell { min-width: 0; }

.job-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.06rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.job-title:hover { text-decoration: underline; text-underline-offset: 3px; }

/* 行全体をクリック可能に */
.job-title::after { content: ""; position: absolute; inset: 0; }

.job-company {
  display: block;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--green-deep);
  margin-top: 2px;
}

.job-loc {
  font-size: 0.85rem;
  color: var(--ink-soft);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.job-badges { display: flex; gap: 6px; justify-self: end; }

@media (max-width: 720px) {
  .job-row { grid-template-columns: 1fr auto; padding: 14px 4px; }
  .job-date { order: 3; }
  .job-loc { order: 4; grid-column: 1 / -1; white-space: normal; }
  .job-badges { order: 2; }
}

/* --------------------------------------------------------------------------
   Badges
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid;
  white-space: nowrap;
  position: relative;
  z-index: 1;
}

.badge-sponsor {
  color: var(--green-deep);
  border-color: color-mix(in srgb, var(--green) 55%, transparent);
  background: var(--green-tint);
}

.badge-sponsor::before { content: "✓"; font-weight: 700; }

.badge-remote {
  color: var(--amber);
  border-color: color-mix(in srgb, var(--amber) 45%, transparent);
  background: var(--amber-tint);
}

/* --------------------------------------------------------------------------
   Detail pages
   -------------------------------------------------------------------------- */
.page { padding: clamp(2rem, 5vw, 3.4rem) 0 3.4rem; }

.breadcrumb {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 1.4rem;
}

.breadcrumb a { color: var(--ink-soft); text-decoration: none; }
.breadcrumb a:hover { color: var(--green-deep); text-decoration: underline; }
.breadcrumb .sep { margin: 0 0.5em; color: var(--line); }

.page h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.7rem, 4.5vw, 2.6rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  max-width: 26ch;
}

.page .sub { margin-top: 0.65rem; color: var(--ink-soft); }

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 1.8rem 0;
}

.meta-cell { background: var(--paper-raised); padding: 14px 16px; }

.meta-cell dt {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 4px;
}

.meta-cell dd { font-size: 0.95rem; font-weight: 500; overflow-wrap: anywhere; }
.meta-cell dd a { text-decoration-thickness: 1px; text-underline-offset: 3px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border-radius: 7px;
  padding: 12px 22px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 100ms ease, box-shadow 100ms ease;
}

.btn-primary {
  background: var(--green);
  color: #fdfdf9;
  box-shadow: 0 1px 0 rgba(10, 82, 58, 0.6), 0 10px 20px -12px rgba(14, 107, 74, 0.7);
}

.btn-primary:hover {
  background: var(--green-deep);
  color: #fdfdf9;
  transform: translateY(-1px);
}

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

.btn-ghost:hover { border-color: var(--ink-soft); }

.btn .ext { font-size: 0.8em; opacity: 0.8; }

.apply-note {
  margin-top: 0.8rem;
  font-size: 0.82rem;
  color: var(--ink-faint);
  max-width: 52ch;
}

/* Sponsor panel */
.sponsor-panel {
  border: 1px solid color-mix(in srgb, var(--green) 40%, transparent);
  background:
    linear-gradient(135deg, var(--green-tint), color-mix(in srgb, var(--green-tint) 30%, var(--paper-raised)));
  border-radius: var(--radius);
  padding: 18px 20px;
  margin: 1.8rem 0;
}

.sponsor-panel .badge { margin-bottom: 8px; }

.sponsor-panel p { font-size: 0.9rem; color: var(--ink-soft); max-width: 68ch; }

.sponsor-panel .fine {
  display: block;
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
}

/* Sections */
.section { margin-top: 2.6rem; }

.section > h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--line);
}

/* Prose (about / post-a-job) */
.prose { max-width: 62ch; }
.prose p { margin: 1rem 0; color: var(--ink-soft); }
.prose h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.35rem;
  margin-top: 2.2rem;
  color: var(--ink);
}
.prose ul { margin: 1rem 0 1rem 1.2rem; color: var(--ink-soft); }
.prose li { margin: 0.35rem 0; }
.prose a { text-underline-offset: 3px; }
.prose strong { color: var(--ink); }

/* Pricing card (post-a-job) */
.price-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-raised);
  padding: clamp(20px, 4vw, 32px);
  max-width: 460px;
  margin: 2rem 0;
  position: relative;
  overflow: hidden;
}

.price-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--green), color-mix(in srgb, var(--green) 30%, var(--paper)));
}

.price-card .plan { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--green-deep); }

.price-card .price {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 2.6rem;
  letter-spacing: -0.02em;
  margin: 0.4rem 0 0.1rem;
}

.price-card .per { font-size: 0.9rem; color: var(--ink-faint); }

.price-card ul { list-style: none; margin: 1.2rem 0; }

.price-card li {
  padding: 0.4rem 0 0.4rem 1.5rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
  position: relative;
}

.price-card li::before { content: "✓"; position: absolute; left: 0; color: var(--green); font-weight: 700; }

.soon-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper);
  border-radius: 4px;
  padding: 3px 8px;
  margin-left: 0.6em;
  vertical-align: middle;
}

/* Tables (h1b-sponsors) */
.table-scroll { overflow-x: auto; margin: 1.6rem 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper-raised); }

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 640px;
}

table.data th {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}

table.data td { padding: 11px 16px; border-bottom: 1px solid var(--line-soft); }
table.data tr:last-child td { border-bottom: none; }
table.data td.num, table.data th.num { text-align: right; font-variant-numeric: tabular-nums; }
table.data .co a { font-weight: 600; text-decoration: none; }
table.data .co a:hover { text-decoration: underline; }
table.data .legal { font-family: var(--mono); font-size: 0.72rem; color: var(--ink-faint); }

.methodology {
  font-size: 0.82rem;
  color: var(--ink-faint);
  border-left: 3px solid var(--green);
  padding: 4px 0 4px 14px;
  max-width: 72ch;
  margin: 1.4rem 0;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--line);
  background: var(--paper-raised);
}

.site-footer .wrap {
  padding-top: 28px;
  padding-bottom: 34px;
  display: flex;
  justify-content: space-between;
  gap: 1.5rem 2.5rem;
  flex-wrap: wrap;
}

.site-footer nav { display: flex; gap: 1.4rem; flex-wrap: wrap; }

.site-footer a {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
}

.site-footer a:hover { color: var(--green-deep); text-decoration: underline; }

.footer-note { font-size: 0.78rem; color: var(--ink-faint); max-width: 46ch; }
.footer-note b { color: var(--ink-soft); font-weight: 600; }

/* Utility */
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

noscript .noscript-note {
  display: block;
  font-size: 0.82rem;
  color: var(--amber);
  margin: 0.6rem 0;
}