@font-face {
  font-family: "Noto Kufi Arabic";
  src: url("fonts/NotoKufiArabic-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Noto Kufi Arabic";
  src: url("fonts/NotoKufiArabic-Bold.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "DejaVu Sans Mono";
  src: url("fonts/DejaVuSansMono.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "DejaVu Sans Mono";
  src: url("fonts/DejaVuSansMono-Bold.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --ink: #142028;
  --muted: #3e5160;
  --bg: #e7eef1;
  --paper: #fff;
  --line: #d3e0e6;
  --teal: #0e7482;
  --teal-d: #0a5c68;
  --soft: #e5f4f6;
  --good: #0d7a45;
  --good-bg: #e7f6ee;
  --bad: #a3261c;
  --bad-bg: #fdecea;
  --warn: #fff6e6;
  --warn-ink: #6d4e12;
  --mono: "DejaVu Sans Mono", ui-monospace, monospace;
  --ar: "Noto Kufi Arabic", "Segoe UI", Tahoma, sans-serif;
  --shadow: 0 12px 32px rgba(20, 40, 48, 0.07);
}

* { box-sizing: border-box; }
html, body { max-width: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--ar);
  font-size: 17px;
  line-height: 1.7;
  overflow-x: clip;
}
button, input, textarea { font-family: inherit; color: inherit; }
button, a, .sample, .name-card, summary { cursor: pointer; }
:focus-visible { outline: 3px solid #1493a3; outline-offset: 2px; }
bdi[dir="ltr"], .en, .formula, .eq, .letter-row, .tile, .cell, .key-now, .ltr, .matrix, .grid-lab, .dials {
  direction: ltr !important;
  unicode-bidi: isolate !important;
}

.top {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  background: #fff;
  border-bottom: 3px solid var(--teal);
}
.brand { display: flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; min-width: 0; }
.logo { width: 112px; height: 48px; object-fit: contain; background: #fff; }
.brand strong { display: block; font-size: 16px; }
.brand span { display: block; font-size: 12px; color: var(--muted); }
.score, .side-n, .key-now, .en, .formula, .eq { font-family: var(--mono); }
.score {
  margin-inline-start: auto;
  background: var(--teal);
  color: #fff;
  border-radius: 999px;
  padding: 6px 12px;
  font-weight: 700;
  direction: ltr;
  unicode-bidi: isolate;
}
.warn {
  background: var(--warn);
  color: var(--warn-ink);
  text-align: center;
  padding: 8px 14px;
  font-size: 14px;
}

.frame {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  align-items: start;
  min-width: 0;
}
.side {
  position: sticky;
  top: 78px;
  max-height: calc(100vh - 88px);
  overflow: auto;
  background: #fff;
  border-inline-end: 1px solid var(--line);
  padding: 12px;
  min-width: 0;
}
.side-group { margin: 14px 6px 6px; color: var(--teal-d); font-size: 12px; font-weight: 700; }
.side-link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  min-height: 48px;
  padding: 6px;
  margin-bottom: 4px;
  border-radius: 12px;
  color: inherit;
  text-decoration: none;
  border: 1px solid transparent;
}
.side-link.on { background: var(--soft); border-color: #b7dde3; border-inline-start: 4px solid var(--teal); }
.side-link.done .pill { background: var(--good-bg); color: var(--good); }
.side-n {
  min-width: 2.2rem;
  min-height: 2.2rem;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--soft);
  color: var(--teal-d);
  font-size: 12px;
  font-weight: 700;
}
.side-link.on .side-n { background: var(--teal); color: #fff; }
.side-link b { display: block; font-size: 14px; line-height: 1.35; }
.side-link small { display: block; color: var(--muted); font-size: 11px; direction: ltr; unicode-bidi: isolate; }
.pill { font-size: 12px; font-weight: 700; color: var(--muted); }

.stage { min-width: 0; }
.wrap { max-width: 880px; margin: 0 auto; padding: 22px 18px 48px; }
.hero, .bench, .card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  padding: 22px;
}
.logo-hero { width: min(100%, 340px); height: auto; display: block; margin-bottom: 8px; }
h1 { font-size: 1.8rem; line-height: 1.35; margin: 0 0 8px; }
h2 { font-size: 1.05rem; margin: 0 0 8px; }
.kicker { color: var(--teal-d); font-weight: 700; font-size: 13px; margin: 0 0 6px; }
.en { margin: 0; color: var(--muted); font-size: 0.95rem; text-align: left; }
.formula {
  display: block;
  margin: 12px 0;
  padding: 10px 12px;
  background: var(--soft);
  border: 1px solid #b7dde3;
  border-radius: 12px;
  text-align: left;
}
.drag-line {
  margin: 14px 0;
  padding: 14px 16px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid #b7dde3;
  border-inline-start: 6px solid var(--teal);
  font-size: 1.12rem;
}
.drag-line strong { color: var(--teal-d); }

.task-line {
  display: block;
  margin: 4px 0 12px;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.9;
}
.key-note {
  margin: 8px 0 0;
  padding: 10px 12px;
  border-radius: 12px;
  font-weight: 700;
}
.key-note.no { background: var(--bad-bg); color: var(--bad); }
.key-note.ok { background: var(--good-bg); color: var(--good); }
.key-hint {
  margin: -4px 0 10px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--muted);
  font-weight: 500;
}
.task-line bdi {
  font-family: var(--mono);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.samples { display: flex; flex-wrap: wrap; gap: 8px; width: 100%; margin: 8px 0 14px; }
.practice {
  margin-top: 22px;
  padding: 16px 16px 8px;
  background: #f7fbfb;
  border: 1px solid var(--line);
  border-inline-start: 6px solid var(--teal);
  border-radius: 18px;
}
.practice-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.practice h2 { margin: 0; font-size: 1.35rem; }
.practice .field { width: 100%; margin-top: 8px; }
.sample {
  min-height: 44px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  font-weight: 700;
}
.sample.on { background: var(--teal); color: #fff; border-color: var(--teal-d); }

.row-label { margin: 12px 0 6px; font-weight: 700; color: var(--teal-d); }
.letter-row {
  display: flex !important;
  flex-direction: row !important;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 8px;
  width: 100%;
  min-height: 60px;
}
.tile {
  font-family: var(--mono);
  font-style: normal;
  font-weight: 700;
  font-size: 1.25rem;
  min-width: 3rem;
  min-height: 56px;
  padding: 0 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #c5d5dc;
  border-bottom-width: 4px;
  border-radius: 12px;
  background: #fff;
}
.tile.on, .tile.hot { background: var(--teal); color: #fff; border-color: var(--teal-d); }
.tile.dim { opacity: 0.4; }
.tile.gone { opacity: 0.28; text-decoration: line-through; }
.eq { margin: 8px 0 0; color: var(--muted); font-size: 14px; text-align: left; overflow-wrap: anywhere; }

.key-stage { margin: 8px 0 4px; }
.slider-block, .dial {
  background: #f4f8f9;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 12px 14px 8px;
  margin-top: 8px;
}
.slider-block { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; }
.slider-block input[type="range"] { flex: 1 1 100%; }
.key-now { font-size: 3.2rem; line-height: 1; color: var(--teal-d); text-align: center; }
input[type="range"] {
  width: 100%;
  height: 48px;
  accent-color: var(--teal);
  cursor: grab;
}
input[type="range"]:active { cursor: grabbing; }
.dials { display: flex; flex-wrap: wrap; gap: 8px; }
.dial { width: 92px; text-align: center; }
.dial b { display: block; font-family: var(--mono); font-size: 1.8rem; color: var(--teal-d); }

.matrix, .grid-lab { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.matrix { display: grid; grid-template-columns: repeat(5, 3rem); }
.cell, .col-lab {
  min-height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid #c5d5dc;
  border-radius: 10px;
  background: #fff;
  font-family: var(--mono);
  font-weight: 700;
}
.col-lab { display: flex; flex-direction: column; gap: 4px; padding: 6px; }

.answer-line, .draft {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
}
.draft { align-items: flex-start; }
.field, textarea {
  flex: 1 1 auto;
  min-width: 0;
  width: auto;
  min-height: 52px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px 12px;
  background: #fff;
  font-size: 1.05rem;
}
.ltr { text-align: left; font-family: var(--mono); }
textarea { min-height: 140px; resize: vertical; }
.btn {
  flex: 0 0 auto;
  min-height: 52px;
  min-width: 7rem;
  padding: 10px 16px;
  border-radius: 14px;
  border: 2px solid var(--teal);
  background: #fff;
  color: var(--teal-d);
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn.primary { background: var(--teal); color: #fff; border-color: var(--teal-d); }
.btn.primary:hover { background: var(--teal-d); }
.fb { margin-top: 14px; padding: 12px 14px; border-radius: 14px; }
.fb.ok { background: var(--good-bg); color: var(--good); }
.fb.no { background: var(--bad-bg); color: var(--bad); }
.safety { margin-top: 16px; background: var(--warn); border-color: #f0d7a8; color: var(--ink); }
.defense { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.defense span, .symptom {
  background: var(--soft);
  border-radius: 999px;
  padding: 6px 10px;
  font-weight: 700;
}
.match { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
.name-card, .drop {
  min-height: 56px;
  border-radius: 14px;
  border: 1px dashed var(--teal);
  background: #fff;
  padding: 10px;
  text-align: center;
  font-weight: 700;
}
.name-card { font-family: var(--mono); direction: ltr; }
.drop.filled { border-style: solid; background: var(--soft); }
.drop small { display: block; color: var(--muted); font-weight: 400; font-family: var(--ar); direction: rtl; unicode-bidi: isolate; }
.navline { display: flex; justify-content: space-between; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.navline .btn { text-decoration: none; }
.list { display: grid; gap: 8px; margin-top: 16px; }
.list a {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  color: inherit;
  text-decoration: none;
  background: #fff;
  min-height: 52px;
  align-items: center;
}
.list a:hover { border-color: var(--teal); }
footer.note { text-align: center; color: var(--muted); font-size: 13px; padding: 8px 16px 28px; }

.vig-table-wrap {
  margin: 16px 0 18px;
  padding: 12px 10px 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow-x: auto;
  max-width: 100%;
}
.vig-table-label { margin: 0 0 6px 2.4rem; font-size: 0.72rem; font-weight: 700; color: var(--muted); text-align: center; }
.vig-key-label {
  display: inline-block;
  transform: rotate(-90deg);
  transform-origin: center;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
}
.vig-table {
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: clamp(0.48rem, 1.35vw, 0.72rem);
  margin: 0 auto;
}
.vig-table th,
.vig-table td {
  min-width: 1.35em;
  padding: 2px 3px;
  text-align: center;
  border: 1px solid #bbb;
  line-height: 1.2;
}
.vig-table thead th { background: #fff; font-weight: 600; text-transform: lowercase; }
.vig-table tbody th { background: #fff; font-weight: 600; text-transform: lowercase; }
.vig-table .vig-corner { border-color: transparent; background: transparent; min-width: 2rem; }
.vig-table td { background: #dcdcdc; color: #111; }
.vig-table td.row-hl { background: #c5e8e3; }
.vig-table td.col-hl { background: #d4eaf5; }
.vig-table td.cell-hl {
  background: var(--teal);
  color: #fff;
  font-weight: 800;
  box-shadow: inset 0 0 0 2px var(--teal-d);
}
.vig-sim {
  margin: 12px 0 0;
  padding: 10px 12px;
  background: var(--soft);
  border-radius: 12px;
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
}
#plain-row .tile { cursor: pointer; }

.vig-watch {
  margin: 0 0 20px;
  padding: 16px 14px 18px;
  background: #f7fbfb;
  border: 1px solid #b7dde3;
  border-inline-start: 6px solid var(--teal);
  border-radius: 18px;
}
.vig-watch-title { margin: 0 0 8px; font-size: 1.25rem; color: var(--teal-d); }
.vig-watch-lead {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 700;
  text-align: center;
  line-height: 1.6;
}
.vig-watch-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 14px;
}
.vig-ltr-label { text-align: start; }
.vig-table-wrap-demo { background: #fff; }
.vig-split {
  margin: 24px 0 16px;
  border: 0;
  border-top: 2px dashed var(--line);
}
.vig-your-turn { margin: 0 0 12px; font-size: 1.2rem; color: var(--teal-d); }

.playfair-watch {
  margin: 0 0 20px;
  padding: 16px 14px 18px;
  background: #f7fbfb;
  border: 1px solid #b7dde3;
  border-inline-start: 6px solid var(--teal);
  border-radius: 18px;
}
.playfair-watch-title { margin: 0 0 8px; font-size: 1.25rem; color: var(--teal-d); }
.playfair-watch-lead {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 0.92rem;
  font-weight: 700;
  text-align: center;
  line-height: 1.6;
}
.playfair-slide-ref {
  margin: 14px 0 0;
  text-align: center;
  font-size: 0.85rem;
}
.playfair-slide-ref a { color: var(--teal-d); font-weight: 700; }
.playfair-demo {
  margin: 16px 0 18px;
  padding: 14px 12px 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
}
.playfair-ref {
  margin: 0 0 12px;
  text-align: center;
}
.playfair-ref img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--line);
}
.playfair-split { margin-bottom: 12px; text-align: center; }
.playfair-split-title { margin: 0 0 6px; font-size: 0.95rem; }
.playfair-split-line {
  margin: 0;
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.8;
}
.playfair-split-note {
  margin: 8px 0 0;
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--muted);
}
.pf-x {
  color: var(--bad);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.playfair-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 10px;
}
.playfair-step-label { font-weight: 700; min-width: 6rem; text-align: center; }
.play-step-btn {
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  font-size: 1.4rem;
  line-height: 1;
}
.play-pair.filler { border-style: dashed; }
.playfair-key-hint {
  margin: 0 0 10px;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--muted);
  text-align: center;
}
.playfair-pairs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 12px;
}
.playfair-pairs-label { font-weight: 700; color: var(--teal-d); margin-inline-end: 4px; }
.playfair-muted { color: var(--muted); font-size: 0.9rem; }
.play-pair {
  min-height: 40px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #f7fbfb;
  font-family: var(--mono);
  font-weight: 700;
  cursor: pointer;
}
.play-pair.on { background: var(--teal); color: #fff; border-color: var(--teal-d); }
.playfair-matrix {
  display: grid;
  grid-template-columns: repeat(5, minmax(2.6rem, 1fr));
  gap: 6px;
  max-width: 22rem;
  margin: 0 auto;
}
.play-cell {
  min-height: 2.75rem;
  display: grid;
  place-items: center;
  border: 1px solid #c5d5dc;
  border-radius: 10px;
  background: #fff;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 0.95rem;
}
.play-cell.pf-row { background: #eef8f6; }
.play-cell.pf-col { background: #eef5fa; }
.play-cell.pf-rect { background: #f4f0fa; }
.play-cell.pf-in {
  box-shadow: inset 0 0 0 2px var(--teal-d);
  background: #dff3ef;
}
.play-cell.pf-out {
  background: var(--teal);
  color: #fff;
  box-shadow: inset 0 0 0 2px #0d6e63;
}
.play-cell.pf-in.pf-out { background: var(--teal); color: #fff; }
.playfair-rule {
  margin: 14px 0 0;
  padding: 10px 12px;
  background: var(--soft);
  border-radius: 12px;
  font-family: var(--mono);
  font-size: 0.92rem;
  font-weight: 700;
  text-align: center;
  line-height: 1.5;
}

@media (max-width: 900px) {
  .frame { grid-template-columns: 1fr; }
  .side {
    position: sticky;
    top: 72px;
    z-index: 4;
    max-height: none;
    display: flex;
    gap: 8px;
    overflow-x: auto;
    border-inline-end: 0;
    border-bottom: 1px solid var(--line);
    width: 100%;
  }
  .side-group { display: none; }
  .side-link { min-width: 180px; flex: 0 0 auto; background: #f4f8f9; }
  .side-link small { display: none; }
}
@media (max-width: 560px) {
  h1 { font-size: 1.4rem; }
  .match { grid-template-columns: 1fr; }
  .answer-line, .draft { flex-wrap: wrap; }
  .answer-line .btn, .draft .btn { flex: 1 1 auto; }
  .logo { width: 92px; height: 40px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}