/* ==========================================================================
   האוניברסיטה — stylesheet
   Dark-first editorial. One file, no framework.
   Palette lives on :root; the light variant overrides only the tokens.
   ========================================================================== */

:root {
  --bg:        #0b0b0d;
  --bg-2:      #101013;
  --surface:   rgba(255, 255, 255, .035);
  --surface-2: rgba(255, 255, 255, .06);
  --line:      rgba(255, 255, 255, .10);
  --line-2:    rgba(255, 255, 255, .18);
  --ink:       #f5f2ec;
  --ink-2:     #c3bdb2;
  --muted:     #85807a;
  --accent:    #ffb020;
  --accent-2:  #ff6a3d;
  --accent-dim: rgba(255, 176, 32, .14);
  --on-accent: #14110a;
  --display: "Heebo", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --serif:   "Frank Ruhl Libre", Georgia, "Times New Roman", serif;
  --wrap: 78rem;
  --read: 40rem;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg:        #f2efe8;
    --bg-2:      #eae6dd;
    --surface:   rgba(0, 0, 0, .028);
    --surface-2: #ffffff;
    --line:      rgba(0, 0, 0, .12);
    --line-2:    rgba(0, 0, 0, .22);
    --ink:       #0e0e10;
    --ink-2:     #3d3a35;
    --muted:     #6f6a63;
    --accent:    #a85c00;
    --accent-2:  #c2410c;
    --accent-dim: rgba(168, 92, 0, .10);
    --on-accent: #fffaf0;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--display);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ambient light behind everything */
.glow {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(58rem 34rem at 88% -8%, rgba(255, 176, 32, .13), transparent 62%),
    radial-gradient(42rem 30rem at 6% 4%, rgba(255, 106, 61, .10), transparent 60%),
    linear-gradient(180deg, var(--bg-2), var(--bg) 42%);
}
@media (prefers-color-scheme: light) {
  .glow {
    background:
      radial-gradient(58rem 34rem at 88% -8%, rgba(255, 176, 32, .28), transparent 62%),
      radial-gradient(42rem 30rem at 6% 4%, rgba(255, 106, 61, .14), transparent 60%),
      linear-gradient(180deg, var(--bg-2), var(--bg) 42%);
  }
}

a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; font-weight: 900; letter-spacing: -.035em; line-height: 1.02; }
.muted { color: var(--muted); }

main { max-width: var(--wrap); margin: 0 auto; padding: 0 1.5rem 7rem; }

.kicker {
  margin: 0 0 1rem;
  font-size: .74rem; font-weight: 700; letter-spacing: .18em;
  color: var(--accent); text-transform: uppercase;
}
.kicker i { font-style: normal; opacity: .45; margin: 0 .35rem; }

.lede { color: var(--ink-2); font-size: 1.08rem; line-height: 1.65; margin: 1rem 0 0; max-width: 40rem; }

/* ------------------------------------------------------------- masthead -- */

.masthead {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--line);
}
.masthead-in {
  max-width: var(--wrap); margin: 0 auto; padding: .85rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.wordmark {
  display: inline-flex; align-items: center; gap: .6rem;
  font-weight: 900; font-size: 1.1rem; letter-spacing: -.03em;
}
.mark {
  width: .95rem; height: .95rem; border-radius: 3px; flex: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  transform: rotate(12deg);
}
.topnav { display: flex; gap: 1.5rem; font-size: .93rem; font-weight: 500; }
.topnav a { color: var(--muted); }
.topnav a:hover { color: var(--ink); }
.topnav a.here { color: var(--ink); }

/* ----------------------------------------------------------------- hero -- */

.hero { padding: 5.5rem 0 3.5rem; }
.hero h1 {
  font-size: clamp(3.4rem, 13vw, 8.5rem);
  background: linear-gradient(150deg, var(--ink) 30%, var(--accent));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero .lede { font-size: 1.2rem; max-width: 34rem; }

.stats {
  display: flex; flex-wrap: wrap; gap: 2.4rem;
  margin-top: 2.75rem; padding-top: 1.6rem;
  border-top: 1px solid var(--line);
  font-size: .84rem; color: var(--muted); letter-spacing: .02em;
}
.stats b {
  display: block; font-size: 2rem; font-weight: 900;
  color: var(--ink); letter-spacing: -.04em; line-height: 1;
  margin-bottom: .3rem;
}

/* -------------------------------------------------------- faculty cards -- */

.facs { display: grid; grid-template-columns: repeat(auto-fill, minmax(19rem, 1fr)); gap: 1px;
        background: var(--line); border: 1px solid var(--line); border-radius: 18px; overflow: hidden; }

.fac {
  position: relative; display: flex; flex-direction: column; gap: .55rem;
  min-height: 15rem; padding: 1.9rem 1.6rem 1.4rem;
  background: var(--bg);
  transition: background .2s ease;
}
.fac::before {
  content: ""; position: absolute; inset-block-start: 0; inset-inline: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0); transform-origin: right; transition: transform .3s ease;
}
.fac:hover { background: var(--surface-2); }
.fac.open:hover::before { transform: scaleX(1); }
.fac.soon { opacity: .5; }

.fac-n {
  font-size: .74rem; font-weight: 700; letter-spacing: .14em; color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.fac-name { display: block; font-size: 1.85rem; font-weight: 900; letter-spacing: -.04em; }
.fac-blurb { display: block; color: var(--muted); font-size: .95rem; line-height: 1.55; margin-top: .35rem; }
.fac-foot { margin-top: auto; padding-top: 1.4rem; display: flex; align-items: center; gap: .9rem; }
.fac-count { font-size: .8rem; color: var(--muted); white-space: nowrap; }

.bar { flex: 1; height: 3px; background: var(--line); border-radius: 99px; overflow: hidden; }
.bar.wide { min-width: 7rem; max-width: 16rem; flex: 1; }
.bar i { display: block; height: 100%; width: 0; border-radius: 99px;
         background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .5s ease; }

/* --------------------------------------------------------------- crumbs -- */

.crumbs { display: flex; gap: .55rem; align-items: center; flex-wrap: wrap;
          padding: 2.4rem 0 2rem; font-size: .84rem; color: var(--muted); }
.crumbs i { font-style: normal; opacity: .4; }
.crumbs a:hover { color: var(--ink); }

/* -------------------------------------------------------- faculty page -- */

.fac-hero { padding-bottom: 2.4rem; border-bottom: 1px solid var(--line); margin-bottom: 3rem; }
.fac-hero h1 { font-size: clamp(2.8rem, 9vw, 5.5rem); }
.fac-bar { display: flex; align-items: center; gap: 1.1rem; margin-top: 2rem; flex-wrap: wrap; }
.progress-label { font-size: .84rem; color: var(--muted); white-space: nowrap; }

.btn {
  display: inline-block; padding: .55rem 1.15rem; border-radius: 99px;
  font-family: var(--display); font-size: .88rem; font-weight: 700; cursor: pointer;
  background: var(--accent); color: var(--on-accent); border: 1px solid var(--accent);
}
.btn:hover { background: var(--accent-2); border-color: var(--accent-2); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.btn.ghost:hover { background: var(--surface-2); }

.era { margin-bottom: 3.5rem; }
.era-head { display: flex; align-items: baseline; gap: 1rem; margin-bottom: 1rem; }
.era-head h2 { font-size: 1.05rem; font-weight: 700; letter-spacing: .1em; text-transform: none; }
.era-head span { font-size: .8rem; color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.era-head::after { content: ""; flex: 1; height: 1px; background: var(--line); }

/* ------------------------------------------------------------ unit rows -- */

.rows { display: flex; flex-direction: column; }

.row {
  position: relative;
  display: grid;
  grid-template-columns: 2.6rem 1fr auto auto 1.1rem;
  align-items: center; gap: 1.1rem;
  padding: 1.15rem .9rem;
  border-bottom: 1px solid var(--line);
  transition: background .16s ease, padding .16s ease;
}
.row:first-child { border-top: 1px solid var(--line); }
.row:hover { background: var(--surface); }
.row:hover .row-n { color: var(--accent); }
.row:hover .row-title { color: var(--accent); }

.row-n { font-size: .8rem; font-weight: 700; color: var(--muted);
         font-variant-numeric: tabular-nums; transition: color .16s ease; }
.row-main { min-width: 0; }
.row-title { display: block; font-size: 1.28rem; font-weight: 700; letter-spacing: -.03em;
             line-height: 1.25; transition: color .16s ease; }
.row-why { display: block; color: var(--muted); font-size: .92rem; line-height: 1.5; margin-top: .25rem;
           display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.row-meta { text-align: left; white-space: nowrap; }
.row-year { display: block; font-size: 1.05rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.row-by { display: block; font-size: .8rem; color: var(--muted); max-width: 11rem;
          overflow: hidden; text-overflow: ellipsis; }
.row-tag { font-size: .72rem; color: var(--accent); background: var(--accent-dim);
           border-radius: 99px; padding: .22rem .7rem; white-space: nowrap; }
.row-tick { width: 1.1rem; height: 1.1rem; border: 1.5px solid var(--line-2); border-radius: 50%;
            position: relative; flex: none; }
.row.is-read .row-tick { background: var(--accent); border-color: var(--accent); }
.row.is-read .row-tick::after {
  content: ""; position: absolute; inset: 0; background: var(--bg);
  clip-path: polygon(21% 52%, 41% 71%, 79% 30%, 86% 38%, 41% 84%, 14% 59%);
}
.row.is-read .row-title { color: var(--muted); }

/* ------------------------------------------------------------ unit page -- */

.unit-page { max-width: 52rem; }

.unit-head { padding-bottom: 2.2rem; border-bottom: 1px solid var(--line); margin-bottom: 2.5rem; }
.unit-head h1 { font-size: clamp(2.6rem, 8vw, 4.6rem); }
.unit-sub { margin: 1rem 0 0; color: var(--ink-2); font-size: 1rem; font-variant-numeric: tabular-nums; }
.unit-sub i { font-style: normal; opacity: .4; margin: 0 .3rem; }

.read-toggle {
  margin-top: 1.6rem; display: inline-flex; align-items: center; gap: .55rem;
  background: transparent; border: 1px solid var(--line-2); border-radius: 99px;
  padding: .45rem 1rem .45rem .85rem; cursor: pointer;
  font-family: var(--display); font-size: .87rem; font-weight: 600; color: var(--muted);
}
.read-toggle:hover { color: var(--ink); border-color: var(--ink-2); }
.read-toggle .box { width: .95rem; height: .95rem; border: 1.5px solid currentColor; border-radius: 50%; position: relative; }
.read-toggle.is-read { color: var(--accent); border-color: var(--accent); background: var(--accent-dim); }
.read-toggle.is-read .box { background: var(--accent); border-color: var(--accent); }
.read-toggle.is-read .box::after {
  content: ""; position: absolute; inset: 0; background: var(--bg);
  clip-path: polygon(21% 52%, 41% 71%, 79% 30%, 86% 38%, 41% 84%, 14% 59%);
}

.prose { font-family: var(--serif); font-size: 1.22rem; line-height: 1.8; color: var(--ink); max-width: var(--read); }
.prose p { margin: 0 0 1.4rem; }
.prose p:first-child::first-letter {
  float: right; font-size: 3.6rem; line-height: .82; font-weight: 900;
  margin: .32rem 0 0 .4rem; color: var(--accent);
}

.why {
  margin: 3rem 0; padding: 1.8rem 1.9rem; position: relative;
  background: var(--surface); border: 1px solid var(--line);
  border-inline-start: 3px solid var(--accent); border-radius: 14px;
}
.why h2 { font-size: .72rem; font-weight: 700; letter-spacing: .16em; color: var(--accent); margin-bottom: .6rem; }
.why p { margin: 0; font-family: var(--serif); font-size: 1.16rem; line-height: 1.65; }

.facts { margin: 3rem 0; }
.facts h2, .syllabus h2 { font-size: 1.5rem; margin-bottom: 1.2rem; }
.facts dl { display: grid; grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); gap: 1px;
            margin: 0; background: var(--bg); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
/* the outline lives on each cell, so a half-empty last row reads as empty
   space rather than as a filled cell with no content */
.facts dl > div { background: var(--bg); padding: 1rem 1.1rem; box-shadow: 0 0 0 1px var(--line); }
.facts dt { font-size: .72rem; letter-spacing: .1em; color: var(--muted); margin-bottom: .3rem; }
.facts dd { margin: 0; font-size: .98rem; line-height: 1.45; font-weight: 500; }

.syllabus { margin-top: 3.5rem; padding-top: 2.4rem; border-top: 1px solid var(--line); }
.syl { margin-top: 2rem; }
.syl h3 { display: flex; align-items: center; gap: .6rem; font-size: .76rem; font-weight: 700;
          letter-spacing: .14em; color: var(--muted); margin-bottom: .7rem; }
.syl h3 i { font-style: normal; color: var(--accent); font-size: .85rem; }
.syl ul { list-style: none; margin: 0; padding: 0; }
.syl li { padding: .85rem 1rem; border-radius: 12px; border: 1px solid transparent; transition: all .16s ease; }
.syl li:hover { background: var(--surface); border-color: var(--line); }
.syl li a { font-weight: 700; font-size: 1.02rem; border-bottom: 2px solid var(--accent-dim); }
.syl li:hover a { border-bottom-color: var(--accent); }
.syl li span { display: block; color: var(--muted); font-size: .89rem; line-height: 1.5; margin-top: .25rem; }

.pagers { display: flex; gap: .8rem; margin-top: 4rem; }
.pager { flex: 1; padding: 1.1rem 1.25rem; background: var(--surface); border: 1px solid var(--line);
         border-radius: 14px; transition: border-color .16s ease, background .16s ease; }
.pager:hover { border-color: var(--accent); background: var(--surface-2); }
.pager span { display: block; font-size: .74rem; letter-spacing: .1em; color: var(--muted); margin-bottom: .25rem; }
.pager b { font-size: 1.05rem; font-weight: 700; letter-spacing: -.02em; }
.pager.next { text-align: left; }

/* ----------------------------------------------------------- flashcards -- */

.cards-page { max-width: 46rem; }
.cards-head { text-align: center; margin-bottom: 2rem; }
.cards-head h1 { font-size: clamp(2.2rem, 7vw, 3.4rem); }
.cards-head .lede { margin-inline: auto; }
.counter { color: var(--muted); font-size: .85rem; font-variant-numeric: tabular-nums; margin-top: 1.2rem; }

.flashcard { position: relative; min-height: 17rem; cursor: pointer; perspective: 1400px; outline: none; }
.flashcard .face {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: .8rem; text-align: center;
  padding: 2.4rem 2rem; border-radius: 20px; border: 1px solid var(--line);
  background: var(--surface-2); backface-visibility: hidden;
  transition: transform .55s cubic-bezier(.4, .2, .2, 1);
}
.flashcard .front { transform: rotateY(0); }
.flashcard .back { transform: rotateY(180deg);
  background: linear-gradient(150deg, var(--accent), var(--accent-2)); color: var(--on-accent); border-color: transparent; }
.flashcard.flipped .front { transform: rotateY(-180deg); }
.flashcard.flipped .back { transform: rotateY(0); }
.flashcard .hint { font-size: .74rem; letter-spacing: .14em; color: var(--accent); }
.flashcard .q { font-size: 2.3rem; font-weight: 900; letter-spacing: -.04em; line-height: 1.1; }
.flashcard .a { font-family: var(--serif); font-size: 1.15rem; line-height: 1.6; white-space: pre-line; }
.flashcard .flip-hint { font-size: .76rem; color: var(--muted); margin-top: .5rem; }
.card-controls { display: flex; gap: .6rem; justify-content: center; margin-top: 1.6rem; }

/* --------------------------------------------------------------- search -- */

.search-page { max-width: 58rem; }
.search-head { padding: 3rem 0 1.5rem; }
.search-head h1 { font-size: clamp(2.4rem, 8vw, 4rem); }
#q {
  width: 100%; margin-top: 1.6rem; padding: 1rem 1.3rem;
  font-family: var(--display); font-size: 1.15rem; font-weight: 500;
  color: var(--ink); background: var(--surface-2);
  border: 1px solid var(--line); border-radius: 14px;
}
#q::placeholder { color: var(--muted); }
#q:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-dim); }
#search-status { margin: 1rem 0 1.5rem; font-size: .88rem; }

/* --------------------------------------------------------------- footer -- */

.footer { border-top: 1px solid var(--line); margin-top: 4rem; }
.footer-in { max-width: var(--wrap); margin: 0 auto; padding: 2.5rem 1.5rem 4rem;
             color: var(--muted); font-size: .86rem; }
.footer-mark { display: block; width: 1.6rem; height: 3px; border-radius: 99px; margin-bottom: 1.1rem;
               background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.footer p { margin: 0 0 .35rem; }

/* ----------------------------------------------------------------- misc -- */

@media (max-width: 760px) {
  body { font-size: 16px; }
  main { padding-inline: 1.1rem; }
  .hero { padding-top: 3.5rem; }
  .stats { gap: 1.5rem; }
  .stats b { font-size: 1.5rem; }
  .row { grid-template-columns: 2.1rem 1fr 1rem; gap: .8rem; padding: 1rem .4rem; }
  .row-meta { display: none; }
  .row-tag { display: none; }
  .prose { font-size: 1.12rem; }
  .prose p:first-child::first-letter { font-size: 3rem; }
  .pagers { flex-direction: column; }
  .facs { border-radius: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}