/* AITools04 / tool9 — practical online-tool look (crontab.guru / formatter style) */

:root {
  --ink: #222;
  --ink-soft: #444;
  --muted: #777;
  --bg: #f5f6f8;
  --paper: #fff;
  --line: #dde1e6;
  --line-strong: #c5cad3;
  --accent: #1a7f37;
  --accent-ink: #116329;
  --accent-soft: #e6f5ea;
  --link: #0969da;
  --warn: #9a6700;
  --ok: #1a7f37;
  --mono: "Source Code Pro", Consolas, "Courier New", monospace;
  --sans: "Open Sans", "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  --wrap: min(980px, calc(100% - 28px));
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font: 15px/1.55 var(--sans);
  color: var(--ink);
  background: var(--bg);
  min-height: 100vh;
}

a { color: var(--link); }
a:hover { color: var(--ink); }

.wrap { width: var(--wrap); margin-inline: auto; }
.wrap--text,
.wrap--read { max-width: 720px; }

/* header: plain bar like most tool sites */
.topbar {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.topbar__in {
  width: var(--wrap);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
}
.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  text-decoration: none;
}
.brand::before { content: none; }
.brand__mark { display: none; }
.menu {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  font-size: 0.9rem;
}
.menu a {
  color: var(--ink-soft);
  text-decoration: none;
}
.menu a:hover,
.menu a.is-on {
  color: var(--accent-ink);
  text-decoration: underline;
}

/* ads */
.ad-slot {
  width: var(--wrap);
  max-width: calc(100% - 28px);
  margin: 12px auto;
  padding: 10px;
  border: 1px solid var(--line);
  background: var(--paper);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.ad-slot--mid { margin: 24px auto; }
.ad-slot-hint {
  margin: 0 0 6px;
  width: 100%;
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-align: center;
}
.ad-slot-inner {
  width: 100%;
  min-height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.ad-slot-inner > * {
  margin-left: auto !important;
  margin-right: auto !important;
}

/* title block — compact, like tool pages */
.mast {
  padding: 20px 0 0;
}
.mast__in { max-width: 40rem; }
.mast__brand { display: none; }
.mast h1 {
  margin: 0 0 6px;
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.25;
}
.mast__lede {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.page { padding: 16px 0 48px; }

/* workbench */
.bench {
  margin-top: 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 14px;
}
.bench__presets {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.bench__tag {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--muted);
}
.presets { display: flex; flex-wrap: wrap; gap: 6px; flex: 1; }
.preset {
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  font-size: 0.82rem;
  padding: 5px 10px;
  cursor: pointer;
  border-radius: 3px;
}
.preset:hover { border-color: var(--accent); color: var(--accent-ink); }
.preset.is-on {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.bench__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
  gap: 14px;
  align-items: start;
}
.bench__fields { display: grid; gap: 10px; }
.field-row {
  display: grid;
  grid-template-columns: minmax(110px, 140px) minmax(0, 1fr);
  gap: 10px;
  padding: 10px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 3px;
}
.field-row__title {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 2px;
}
.field-row h3 {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 700;
}
.field-any {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.72rem;
  padding: 2px 6px;
  cursor: pointer;
  border-radius: 3px;
}
.field-any:hover {
  border-color: var(--accent);
  color: var(--accent-ink);
}
.field-row .hint {
  margin: 0;
  font-size: 0.72rem;
  color: var(--muted);
}
.field-note {
  margin: 6px 0 0;
  font-size: 0.75rem;
  line-height: 1.4;
  color: #82071e;
  background: #ffebe9;
  border: 1px solid #ff8182;
  padding: 6px 8px;
  border-radius: 3px;
}
.field-note[hidden] { display: none !important; }
.chip-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  max-height: 108px;
  overflow: auto;
}
.chip {
  border: 1px solid var(--line-strong);
  background: #fff;
  font: 0.72rem/1 var(--mono);
  padding: 4px 6px;
  cursor: pointer;
  color: var(--ink-soft);
  border-radius: 2px;
  min-width: 1.7em;
  text-align: center;
}
.chip:hover { border-color: var(--accent); }
.chip.is-on {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.rail {
  position: sticky;
  top: 12px;
  border: 1px solid var(--line);
  background: var(--bg);
  padding: 12px;
  border-radius: 3px;
}
.rail__label {
  margin: 0 0 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.expr-value {
  font: 600 1rem/1.45 var(--mono);
  letter-spacing: 0.03em;
  word-break: break-all;
  color: var(--ink);
  padding: 10px 12px;
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
}
.expr-value.is-invalid {
  color: #cf222e;
  border-color: #ff8182;
  background: #ffebe9;
}
.rail.is-invalid {
  border-color: #ff8182;
  background: #fff5f5;
}
.btn:disabled,
.preset:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.cal-warn.is-err {
  background: #ffebe9;
  border-color: #ff8182;
  color: #82071e;
}
.field-note {
  margin: 6px 0 0;
  font-size: 0.75rem;
  line-height: 1.4;
  color: #82071e;
  background: #ffebe9;
  border: 1px solid #ff8182;
  padding: 6px 8px;
  border-radius: 3px;
}
.field-note[hidden] { display: none !important; }
.expr-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}
.btn {
  border: 0;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 700;
  padding: 8px 14px;
  cursor: pointer;
  border-radius: 3px;
}
.btn:hover { background: var(--accent-ink); }
.btn--ghost {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line-strong);
}
.btn--ghost:hover { background: var(--bg); }
.human {
  margin: 10px 0 0;
  padding: 8px 10px;
  background: var(--accent-soft);
  border: 1px solid #b7dfc3;
  color: var(--accent-ink);
  font-size: 0.9rem;
  border-radius: 3px;
}
.cal-warn {
  margin: 8px 0 0;
  padding: 8px 10px;
  background: #fff8c5;
  border: 1px solid #eac54f;
  color: #633c01;
  font-size: 0.84rem;
  border-radius: 3px;
}
.cal-warn[hidden] { display: none !important; }
.next-runs {
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  display: grid;
  gap: 4px;
}
.next-runs li {
  padding: 5px 8px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 2px;
}
.msg { margin: 8px 0 0; font-size: 0.88rem; font-weight: 700; }
.msg.is-ok { color: var(--ok); }
.msg.is-err { color: #cf222e; }

/* content sections */
.section {
  margin: 22px 0 0;
  scroll-margin-top: 16px;
  padding: 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
}
.section__intro { margin-bottom: 10px; }
.section__head {
  margin: 0 0 4px;
  font-size: 1.15rem;
  font-weight: 700;
}
.section__sub {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.92rem;
}
.section--split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 20px;
  align-items: start;
}
.chars-box { padding: 0; border: 0; background: transparent; }
.table-scroll { overflow-x: auto; }

.example-table,
.ref-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: #fff;
  border: 1px solid var(--line);
}
.example-table th,
.example-table td,
.ref-table th,
.ref-table td {
  border-bottom: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}
.example-table th,
.ref-table th {
  background: var(--bg);
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 700;
}
.example-table code,
.ref-table code,
.prose code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: #f0f2f5;
  padding: 1px 4px;
  border-radius: 2px;
}
.example-table button {
  border: 0;
  background: transparent;
  color: var(--link);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  padding: 0;
}
.example-table button:hover { text-decoration: underline; }

.prose h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 10px;
}
.prose h2 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 1.25em 0 0.4em;
}
.prose p, .prose li { color: var(--ink-soft); }
.prose ul { padding-left: 1.2em; }

.faq-list { display: grid; gap: 8px; }
.faq-list--2 { grid-template-columns: 1fr 1fr; gap: 8px; }
.faq-item {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 3px;
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  font-weight: 700;
  padding: 10px 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item[open] summary {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.faq-item .faq-body {
  padding: 10px 12px 12px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

/* footer */
.foot {
  border-top: 1px solid var(--line);
  background: var(--paper);
  color: var(--muted);
  padding: 22px 0 28px;
  font-size: 0.88rem;
}
.foot__in { display: grid; gap: 10px; }
.brand--foot { color: var(--ink); }
.foot a { color: var(--link); text-decoration: none; }
.foot a:hover { text-decoration: underline; }
.foot__links { display: flex; flex-wrap: wrap; gap: 8px 14px; }
.foot__legal { margin: 0; }

/* info pages */
.page.page--info { padding-top: 8px; }
.info-hero {
  margin: 0 0 14px;
  padding: 0;
  background: transparent;
  border: 0;
  color: inherit;
}
.info-kicker {
  margin: 0 0 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.info-hero h1 {
  margin: 0 0 8px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--ink);
  font-style: normal;
}
.info-hero .lede,
.lede-info {
  margin: 0;
  color: var(--muted);
  max-width: 38rem;
}
.info-panel {
  margin: 0 0 14px;
  padding: 14px 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
}
.info-panel h2 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 8px;
}
.contact-mail {
  display: inline-block;
  margin: 6px 0;
  font-family: var(--mono);
  font-size: 0.95rem;
  padding: 6px 10px;
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--link);
  text-decoration: none;
  border-radius: 3px;
}
.article-back {
  margin: 4px 0 12px;
  font-size: 0.9rem;
}

/* blog */
.page--blog { padding-top: 4px; }
.blog-mast {
  margin: 0 0 14px;
  padding: 0;
  background: transparent;
  border: 0;
}
.blog-mast h1 {
  margin: 0 0 6px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--ink);
  font-family: var(--sans);
}
.blog-mast p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.blog-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  gap: 12px;
  margin-bottom: 12px;
}
.blog-feature__main {
  padding: 14px 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
}
.blog-feature__label {
  margin: 0 0 6px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}
.blog-feature h2 {
  margin: 0 0 8px;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.3;
  font-style: normal;
  font-family: var(--sans);
}
.blog-feature h2 a {
  color: var(--ink);
  text-decoration: none;
}
.blog-feature h2 a:hover { color: var(--link); }
.blog-feature__excerpt {
  margin: 0 0 8px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}
.blog-feature__meta {
  font-size: 0.8rem;
  color: var(--muted);
}
.blog-feature__aside {
  padding: 14px 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
}
.blog-feature__aside p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}
.blog-feature__aside a {
  font-size: 0.88rem;
  font-weight: 700;
  color: #fff;
  background: var(--accent);
  text-decoration: none;
  padding: 7px 12px;
  border-radius: 3px;
  align-self: flex-start;
}
.blog-feature__aside a:hover { background: var(--accent-ink); color: #fff; }

.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.blog-card {
  padding: 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
  display: grid;
  gap: 6px;
}
.blog-card:nth-child(odd),
.blog-card:nth-child(even) {
  padding: 14px;
  border-right: 1px solid var(--line);
}
.blog-card time {
  font-size: 0.75rem;
  color: var(--muted);
}
.blog-card h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.3;
  font-style: normal;
  font-family: var(--sans);
}
.blog-card h3 a {
  color: var(--ink);
  text-decoration: none;
}
.blog-card h3 a:hover { color: var(--link); }
.blog-card .excerpt {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.88rem;
}
.blog-card__more {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--link);
  text-decoration: none;
}
.blog-card__more:hover { text-decoration: underline; }

.article-shell {
  max-width: 680px;
  padding: 16px 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
}
.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.article-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.88rem;
}
.article-nav a:hover { color: var(--link); }
.article-nav__dir {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2px;
}
.article-nav__title {
  font-weight: 700;
  color: var(--ink);
  display: block;
  line-height: 1.3;
}
.article-nav__next { text-align: right; }
.article .meta {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0 0 12px;
}
.article h1 {
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 8px;
  font-style: normal;
  font-family: var(--sans);
}
.article pre {
  overflow: auto;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.84rem;
  border-radius: 3px;
}

.post-list { list-style: none; padding: 0; margin: 0; }

@media (max-width: 900px) {
  .bench__grid,
  .section--split,
  .faq-list--2,
  .blog-feature,
  .blog-grid { grid-template-columns: 1fr; }
  .rail { position: static; }
  .article-nav { grid-template-columns: 1fr; }
  .article-nav__next { text-align: left; }
}
@media (max-width: 600px) {
  .field-row { grid-template-columns: 1fr; }
  .topbar__in { flex-direction: column; align-items: flex-start; }
}