:root { --ink:#1c2b25; --accent:#1f7a5a; --bg:#f6f4ec; --line:#e4ddcc; --muted:#5a6b62; }
* { box-sizing: border-box; }
body { font-family: system-ui, 'Segoe UI', sans-serif; background: var(--bg); color: var(--ink);
       margin: 0; line-height: 1.7; }
.wrap { max-width: 44rem; margin: 0 auto; padding: 1.5rem; }
a.back { color: var(--accent); text-decoration: none; }
h1 { font-size: 1.6rem; margin: .5rem 0 .2rem; }
.date { color: var(--muted); margin: 0 0 1rem; }
.sub { color: var(--accent); }

/* Site title (multilingual, one line per language) */
.sitetitle { font-size: 1.35rem; line-height: 1.55; margin: .5rem 0 1rem; font-weight: 700; }
.sitetitle span { display: block; }

/* Index list */
ul.lessons { list-style: none; padding: 0; }
ul.lessons li { margin: .4rem 0; }
ul.lessons a { display: flex; gap: .8rem; align-items: flex-start; text-decoration: none; color: inherit;
  background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: .8rem 1rem; }
ul.lessons a:hover { border-color: var(--accent); }
/* Lesson number: compact on phones (mobile-first)… */
.d { color: var(--muted); font-variant-numeric: tabular-nums; font-size: .85rem; padding-top: .15rem;
     flex: 0 0 auto; }
.titles { display: flex; flex-direction: column; gap: .2rem; flex: 1 1 auto; }
.tline { font-weight: 600; }
/* …large and prominent (about half the row) on wider screens. */
@media (min-width: 640px) {
  ul.lessons a { align-items: center; gap: 1.2rem; }
  .d { flex: 0 0 40%; font-size: 2.2rem; font-weight: 700; color: var(--accent);
       text-align: center; padding-top: 0; }
}

/* Language toggle */
.langtoggle { margin: .5rem 0 1rem; }
.langbtn { border: 1px solid #d9d3c4; background: #fff; padding: .4rem .8rem; border-radius: 999px;
  cursor: pointer; margin: 0 .3rem .3rem 0; font: inherit; }
.langbtn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.banner { background: #fff4e0; border: 1px solid #e6c37a; color: #7a5a12; padding: .7rem;
  border-radius: 8px; margin: 1rem 0; }

/* Table of contents */
.toc { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: .8rem 1.2rem; margin: 1rem 0; }
.toctitle { font-weight: 700; margin: .2rem 0 .5rem; }
.toc ul { list-style: none; padding: 0; margin: 0; }
.toc li { margin: .3rem 0; }
.toc a { color: var(--accent); text-decoration: none; }
.toc a:hover { text-decoration: underline; }

/* Collapsible sections */
details.sec { background: #fff; border: 1px solid var(--line); border-radius: 10px; margin: .8rem 0; padding: 0 1.2rem; }
details.sec > summary { cursor: pointer; font-weight: 700; padding: .9rem 0; list-style: none; }
details.sec > summary::-webkit-details-marker { display: none; }
details.sec > summary::before { content: "\25B8"; display: inline-block; margin-inline-end: .5rem;
  color: var(--accent); transition: transform .15s; }
details.sec[open] > summary::before { transform: rotate(90deg); }
.secbody { padding-bottom: 1rem; }

/* Report error */
.report { margin: 2.5rem 0 1rem; text-align: center; }
#reportlink { display: inline-block; color: #9a2b1f; border: 1px solid #e0b4ad; background: #fff;
  padding: .5rem 1rem; border-radius: 8px; text-decoration: none; }
#reportlink:hover { background: #fbe9e7; }
.reportaddr { margin-top: .5rem; font-size: .85rem; color: var(--muted); }
.reportaddr a { color: var(--muted); }

/* Footnote reference markers */
.fnref { font-size: .75em; vertical-align: super; line-height: 0; }

/* Content typography */
.lang-block table { border-collapse: collapse; width: 100%; }
.lang-block th, .lang-block td { border: 1px solid var(--line); padding: .5rem; text-align: start; }
.lang-block blockquote { border-inline-start: 3px solid var(--accent); margin: .6rem 0; padding: .2rem 1rem;
  color: #2c463b; font-weight: 600; }
[dir=rtl] { font-size: 1.1rem; }

.status-msg { color: var(--muted); padding: 2rem 0; }

/* Auth: account bar on gated pages */
.authbar { display: flex; justify-content: flex-end; align-items: center; gap: .6rem;
  min-height: 1.5rem; font-size: .85rem; color: var(--muted); margin-bottom: .5rem; }
.authuser { color: var(--muted); }
.linkbtn { background: none; border: 0; color: var(--accent); cursor: pointer; font: inherit;
  padding: 0; text-decoration: underline; }

/* Auth: login / reset pages */
body.authpage { display: grid; place-items: center; min-height: 100vh; padding: 1.5rem; }
.authcard { background: #fff; max-width: 24rem; width: 100%; padding: 2rem;
  border: 1px solid var(--line); border-radius: 14px; box-shadow: 0 6px 24px rgba(0,0,0,.05); }
.authcard h1 { font-size: 1.4rem; margin: 0 0 .2rem; }
.authcard .sub { color: var(--muted); margin: 0 0 1.2rem; }
.authcard label { display: block; font-weight: 600; margin: 1rem 0 .35rem; }
.authcard input { width: 100%; padding: .7rem .8rem; border: 1px solid var(--line);
  border-radius: 8px; font-size: 1rem; }
.authcard button[type=submit] { margin-top: 1.4rem; width: 100%; padding: .8rem; font-size: 1rem;
  background: var(--accent); color: #fff; border: 0; border-radius: 8px; cursor: pointer; }
.forgotrow { margin: 1rem 0 0; font-size: .9rem; }
.forgotrow a { color: var(--accent); }
.msg { margin-top: 1rem; padding: .8rem; border-radius: 8px; display: none; }
.msg.ok  { background: #e6f4ee; color: #14603f; display: block; }
.msg.err { background: #fbe9e7; color: #9a2b1f; display: block; }