/* Curriculum pages. One shared stylesheet rather than the inline <style> the
   homepage uses: there are fifty of these, and inlining would repeat ~6KB in
   every one of them. A second request is the cheaper trade at that count. */

:root{
  /* --teal-ink: see docs/landing rationale (5.22:1 white-on-fill, 4.72:1 on
     #E6F7F6 chips). --teal stays for decorative/border-only/logo use. */
  --navy:#081B3A; --teal:#00A99D; --teal-ink:#007A72; --aqua:#34D6C6;
  --bg:#F5F7FA; --card:#fff; --muted:#5A6A7D; --border:#DDE6E8;
}
*{box-sizing:border-box}
body{
  margin:0; background:var(--bg); color:var(--navy);
  font-family:"IBM Plex Sans Arabic",system-ui,"Segoe UI",Tahoma,sans-serif;
  line-height:1.75; -webkit-font-smoothing:antialiased;
}
.wrap{max-width:1040px; margin:0 auto; padding:0 24px}
a{color:inherit}
:focus-visible{outline:2px solid var(--teal-ink); outline-offset:3px; border-radius:3px}

/* header — same furniture as the homepage, minus the section nav, which would
   point at anchors these pages do not have. */
header{padding:20px 0; background:rgba(245,247,250,.9); backdrop-filter:blur(8px);
       position:sticky; top:0; z-index:10; border-bottom:1px solid var(--border)}
header .wrap{display:flex; align-items:center; gap:16px; flex-wrap:wrap}
.brand{display:flex; align-items:center; gap:9px; font-weight:700; font-size:21px; text-decoration:none}
.head-cta{margin-inline-start:auto; display:flex; gap:10px; flex-wrap:wrap}
.btn-sm{display:inline-block; padding:8px 14px; border-radius:9px; font-size:14px;
        font-weight:600; text-decoration:none; border:1px solid var(--border); background:var(--card)}
.btn-sm-primary{background:var(--teal-ink); border-color:var(--teal-ink); color:#fff}

/* breadcrumbs */
.crumbs{font-size:14px; color:var(--muted); padding:22px 0 0}
.crumbs a{text-decoration:none; border-bottom:1px solid var(--border)}
.crumbs a:hover{border-color:var(--navy)}
.crumbs .here{color:var(--navy); font-weight:600}

h1{font-size:clamp(28px,4.4vw,42px); line-height:1.35; margin:18px 0 14px}
.lede{font-size:clamp(16px,1.8vw,18px); color:var(--muted); max-width:62ch; margin:0 0 22px}
.cta-inline{margin:0 0 34px}

.btn{display:inline-block; padding:13px 24px; border-radius:11px; font-weight:600;
     text-decoration:none; border:1px solid var(--border); background:var(--card); margin-inline-end:10px}
.btn-primary{background:var(--teal-ink); border-color:var(--teal-ink); color:#fff}

/* semesters and units */
.sem{margin:0 0 10px}
.sem > h2{font-size:clamp(20px,2.6vw,26px); margin:34px 0 4px; padding-bottom:10px;
          border-bottom:2px solid var(--teal); display:inline-block}
.unit{background:var(--card); border:1px solid var(--border); border-radius:14px;
      padding:20px 22px; margin:18px 0}
.unit > h3{font-size:19px; margin:0 0 6px; color:var(--navy)}

/* lessons. Numbered because NCCD orders them and a teacher looking for
   "the third lesson" is a real way this gets read. */
ol.lessons{margin:0; padding-inline-start:22px}
ol.lessons > li{margin:16px 0; padding-inline-start:4px}
ol.lessons > li::marker{color:var(--teal-ink); font-weight:700}
.ltitle{font-weight:600; display:block}

.lbl{display:block; font-size:12.5px; font-weight:600; color:var(--teal-ink);
     letter-spacing:.01em; margin:8px 0 2px}
.obj ul{margin:0; padding-inline-start:20px; color:var(--muted); font-size:15px}
.obj li{margin:2px 0}

.terms{margin-top:8px; font-size:14px; color:var(--muted)}
.term{display:inline-block; background:var(--bg); border:1px solid var(--border);
      border-radius:999px; padding:1px 10px; margin:3px 3px 0 0; font-size:13px; color:var(--navy)}

/* sibling subjects + index cards */
.siblings{margin:40px 0 0}
.siblings h2, .grade h2{font-size:20px; margin:0 0 12px}
ul.pills{list-style:none; margin:0; padding:0; display:flex; flex-wrap:wrap; gap:8px}
ul.pills a{display:inline-block; background:var(--card); border:1px solid var(--border);
           border-radius:999px; padding:7px 15px; text-decoration:none; font-size:14.5px; font-weight:500}
ul.pills a:hover{border-color:var(--teal)}

/* Jump-nav: only rendered past 6 units (see the generator). A 40-unit page
   had no way to reach a specific unit except scrolling past every one before
   it, despite units being the one addressable structure the page already has. */
.jump{background:var(--card); border:1px solid var(--border); border-radius:14px; padding:18px 20px; margin:28px 0}
.jump-sem + .jump-sem{margin-top:14px}
.jump-label{display:block; font-size:13px; font-weight:600; color:var(--muted); margin-bottom:8px}
.jump .pills a{font-size:13.5px; padding:5px 12px}

.grade{margin:0 0 34px}
.gmeta{color:var(--muted); font-size:14px; margin:0 0 14px}
/* The way out for a reader whose subject is not published yet. */
.missing{margin:36px 0 8px; padding:18px 20px; border:1px solid var(--border); border-radius:14px; background:var(--card); color:var(--muted); font-size:15px}
.missing a{color:var(--teal-ink); font-weight:600}
ul.cards{list-style:none; margin:0; padding:0;
         display:grid; grid-template-columns:repeat(auto-fill,minmax(210px,1fr)); gap:12px}
ul.cards a{display:block; background:var(--card); border:1px solid var(--border);
           border-radius:13px; padding:16px 18px; text-decoration:none; height:100%}
ul.cards a:hover{border-color:var(--teal)}
.cname{display:block; font-weight:600; font-size:17px; margin-bottom:3px}
.cmeta{display:block; color:var(--muted); font-size:13.5px}

.closing{margin:46px 0 0; padding:28px 24px; background:var(--card);
         border:1px solid var(--border); border-radius:16px}
.closing h2{margin:0 0 8px; font-size:21px}
.closing p{margin:0 0 14px; color:var(--muted)}
.closing p:last-child{margin:0}

footer{margin-top:56px; padding:28px 24px 40px; text-align:center;
       color:var(--muted); font-size:14px; border-top:1px solid var(--border)}
.mail{color:var(--teal-ink)}

@media (prefers-reduced-motion:reduce){*{transition:none!important}}