@font-face { font-family: "Aref Ruqaa"; src: url("assets/fonts/aref-ruqaa-arabic-400-normal.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Aref Ruqaa"; src: url("assets/fonts/aref-ruqaa-arabic-700-normal.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Amiri"; src: url("assets/fonts/amiri-arabic-400-normal.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Amiri"; src: url("assets/fonts/amiri-arabic-700-normal.woff2") format("woff2"); font-weight: 700; font-display: swap; }

:root {
  --parchment: #e6d3a3;
  --parchment-deep: #d4bb82;
  --vellum: #efe0b9;
  --ink: #241c12;
  --ink-soft: #57462a;
  --green: #1f4d2b;
  --green-deep: #143720;
  --mizan: #a4261c;
  --rule: #7c6b48;
  --gutter: clamp(16px, 4vw, 44px);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { background: var(--parchment); -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  font: 400 1.19rem/1.95 "Amiri", "Traditional Arabic", serif;
  overflow-x: clip;
  background-color: var(--parchment);
  /* ألياف الورق وبقع العمر: نسيج واحد مولّد، بلا صور */
  background-image:
    radial-gradient(120% 90% at 50% 0%, transparent 62%, rgba(92, 62, 20, .2) 100%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='520' height='520'%3E%3Cfilter id='f' x='0' y='0' width='100%25' height='100%25'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.012 .02' numOctaves='5' seed='7' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .42 0 0 0 0 .29 0 0 0 0 .1 0 0 0 .3 -.1'/%3E%3C/filter%3E%3Cfilter id='g' x='0' y='0' width='100%25' height='100%25'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8 .55' numOctaves='3' seed='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .3 0 0 0 0 .2 0 0 0 0 .08 0 0 0 .26 -.07'/%3E%3C/filter%3E%3Crect width='520' height='520' filter='url(%23f)'/%3E%3Crect width='520' height='520' filter='url(%23g)'/%3E%3C/svg%3E");
  background-attachment: scroll;
}

.defs { position: absolute; }
.book { max-width: 1120px; margin: 0 auto; padding: var(--gutter) var(--gutter) 0; display: grid; gap: var(--gutter); }

/* إطار الكراسة: خط أخضر عريض، ثم خط رفيع بني */
.folio {
  position: relative;
  padding: clamp(48px, 7vw, 84px) clamp(22px, 6vw, 84px);
  border: clamp(5px, .9vw, 8px) solid var(--green);
  outline: 1.5px solid var(--ink-soft);
  outline-offset: -14px;
  isolation: isolate;
}
.corner { position: absolute; width: clamp(62px, 11vw, 124px); height: clamp(62px, 11vw, 124px); color: var(--ink-soft); pointer-events: none; z-index: -1; }
.c-tl { top: 20px; left: 20px; }
.c-tr { top: 20px; right: 20px; transform: scaleX(-1); }
.c-bl { bottom: 20px; left: 20px; transform: scaleY(-1); }
.c-br { bottom: 20px; right: 20px; transform: scale(-1); }

h1, h2, h3, .cartouche { font-family: "Aref Ruqaa", "Amiri", serif; font-weight: 700; }
h1 { font-size: clamp(2.6rem, 7vw, 4.6rem); line-height: 1.25; margin: .1em 0 .2em; text-align: center; color: var(--green-deep); }
h2 { font-size: clamp(2rem, 5vw, 3.1rem); line-height: 1.3; margin: 0 0 .5em; text-align: center; color: var(--green-deep); }
h3 { font-size: 1.65rem; line-height: 1.4; margin: 0 0 .35em; color: var(--green-deep); }
p { margin: 0 0 1em; }
.intro { text-align: center; max-width: 60ch; margin-inline: auto; }

.cartouche {
  width: max-content;
  margin: 0 auto clamp(10px, 2vw, 24px);
  padding: .2em 2em .25em;
  font-size: clamp(1.2rem, 2.8vw, 1.7rem);
  color: var(--ink);
  background: var(--vellum);
  border: 2px solid var(--ink-soft);
  outline: 1px solid var(--ink-soft);
  outline-offset: 3px;
  border-radius: 999px / 70%;
}

/* الورقة التي تُكتب عليها الضربات */
.sheet { position: relative; width: 100%; }
.sheet canvas { position: absolute; inset: 0; width: 100%; height: 100%; mix-blend-mode: multiply; display: block; }
.hero-sheet { aspect-ratio: 19 / 6.5; }
.angle-sheet { aspect-ratio: 10 / 5.7; }
.lesson-sheet { aspect-ratio: 10 / 9; background: rgba(239, 224, 185, .55); border: 1px solid var(--rule); }
.is-practice #lesson-ink { cursor: crosshair; touch-action: none; }

.qasaba { position: absolute; top: 0; left: 0; width: 1px; height: 1px; overflow: visible; pointer-events: none; will-change: transform; z-index: 3; filter: drop-shadow(4px 8px 5px rgba(58, 33, 13, .28)); }
.qasaba use { transform: scale(var(--reed-scale, .8)); transform-origin: 0 0; }

.inkwell { position: absolute; right: 0; bottom: 0; width: clamp(48px, 7.5vw, 86px); height: clamp(37px, 5.8vw, 66px); z-index: 2; }
.hero-sheet .inkwell { bottom: -12%; right: -3%; }
.lesson-sheet .inkwell { right: 10px; bottom: 8px; }

.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.lede { max-width: 60ch; margin: 0 auto 1.2em; text-align: center; font-size: 1.3rem; }
.folio-hero { text-align: center; }
.folio-hero .action { display: block; margin-inline: auto; }

button, input, label { font: inherit; }
.action {
  padding: .3em 1.4em .4em;
  color: var(--vellum);
  background: var(--green);
  border: 0;
  border-radius: 3px;
  cursor: pointer;
  box-shadow: inset 0 0 0 1px var(--vellum), inset 0 0 0 3px var(--green);
}
.action:hover { background: var(--green-deep); }
:focus-visible { outline: 3px solid var(--mizan); outline-offset: 2px; }

/* الميزان */
.split { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(24px, 5vw, 56px); align-items: center; }
.prose { max-width: 62ch; }
.angle-box { margin: 0; }
figcaption { margin-top: 10px; display: grid; gap: 4px; }
figcaption label { font-weight: 700; }
output { color: var(--mizan); font-weight: 700; }
input[type="range"] { width: 100%; accent-color: var(--green); direction: ltr; }
.angle-note { font-size: 1rem; color: var(--ink-soft); }

/* الحروف */
.letter-keys { display: grid; grid-template-columns: repeat(auto-fill, minmax(50px, 1fr)); gap: 4px; margin: 1.2em 0 .8em; }
.word-row { display: flex; flex-wrap: wrap; align-items: center; gap: .5em 1em; margin-bottom: 1.6em; }
.word-row h3 { margin: 0; font-size: 1.35rem; }
.word-keys { display: flex; flex-wrap: wrap; gap: 4px; }
.letter-key.is-word { aspect-ratio: auto; padding: .35em .8em .45em; font-size: 1.4rem; }
.letter-key {
  aspect-ratio: 1;
  font: 700 1.55rem/1 "Aref Ruqaa", serif;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--rule);
  cursor: pointer;
}
.letter-key:hover { background: rgba(31, 77, 43, .14); }
.letter-key[aria-pressed="true"] { color: var(--vellum); background: var(--green); border-color: var(--green-deep); }

.lesson { display: grid; grid-template-columns: 1.45fr 1fr; gap: clamp(20px, 4vw, 44px); align-items: start; }
.letter-card h3 { font-size: 2.3rem; margin: 0; }
.letter-size { color: var(--mizan); font-weight: 700; margin-bottom: .5em; }
.modes { display: flex; margin: 1em 0 .8em; border: 1px solid var(--green); width: max-content; max-width: 100%; }
.mode { padding: .2em 1em .3em; background: transparent; border: 0; color: var(--green-deep); cursor: pointer; }
.mode[aria-pressed="true"] { background: var(--green); color: var(--vellum); }
.steps { margin: .6em 0 .8em; padding: 0; list-style: none; counter-reset: step; font-size: 1.1rem; line-height: 1.7; }
.steps li { counter-increment: step; display: grid; grid-template-columns: 1.7em 1fr; gap: .4em; padding: .3em .35em; color: var(--ink-soft); border-inline-start: 3px solid transparent; }
.steps li::before { content: counter(step, arabic-indic); width: 1.5em; height: 1.5em; line-height: 1.45em; margin-top: .1em; text-align: center; font-weight: 700; color: var(--mizan); border: 1.5px solid var(--mizan); border-radius: 50%; }
.steps li.is-now { color: var(--ink); background: rgba(31, 77, 43, .1); border-inline-start-color: var(--green); }
.steps li.is-done { color: var(--ink); }
.note { color: var(--ink-soft); font-size: 1.06rem; }
.video-box { margin-top: 1em; padding-top: .7em; border-top: 1px solid var(--rule); display: grid; gap: .4em; justify-items: start; }
.link-button { padding: 0; background: none; border: 0; color: var(--green-deep); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; text-align: start; }
.video-frame { width: 100%; aspect-ratio: 16 / 9; }
.video-frame iframe { width: 100%; height: 100%; border: 0; }
#video-link { font-size: 1rem; }
.practice-hint { font-size: 1.06rem; color: var(--ink-soft); }
.controls { display: flex; flex-wrap: wrap; align-items: center; gap: .4em 1.1em; }
.check { display: inline-flex; align-items: center; gap: .4em; cursor: pointer; }
.check input { accent-color: var(--green); width: 1.05em; height: 1.05em; }

/* الأدوات */
.cut-steps { margin-bottom: 2em; }
.cut-steps h3 { text-align: center; }
.cuts { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(10px, 3vw, 28px); counter-reset: cut; }
.cuts li { display: grid; justify-items: center; text-align: center; align-content: start; line-height: 1.6; counter-increment: cut; }
.cuts svg { width: clamp(52px, 8vw, 78px); height: auto; }
.cuts strong { font: 700 1.35rem/1.5 "Aref Ruqaa", serif; color: var(--green-deep); }
.cuts strong::before { content: counter(cut, arabic-indic) ". "; color: var(--mizan); }
.cuts span { font-size: 1.04rem; }
.reed-fill { fill: #a87237; stroke: #3a210d; stroke-width: 1.5; }
.reed-cut { fill: #e2c790; stroke: #3a210d; stroke-width: 1; }

.tools { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.2em clamp(24px, 5vw, 56px); margin: 0; }
.tools div:last-child:nth-child(odd) { grid-column: 1 / -1; max-width: 60ch; }
dt { font: 700 1.45rem/1.5 "Aref Ruqaa", serif; color: var(--green-deep); }
dd { margin: 0; }

/* قاعدة أم اجتهاد */
.rule-columns { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3.5vw, 40px); margin-top: 1.4em; }
.rule-columns > div + div { border-right: 1px solid var(--rule); padding-right: clamp(20px, 3.5vw, 40px); }
.rule-columns h3 { text-align: center; }
.rule-columns ul { margin: 0; padding: 0 1.1em 0 0; line-height: 1.75; }
.rule-columns li { margin-bottom: .55em; }
.rule-columns li::marker { color: var(--mizan); content: "◆  "; font-size: .55em; }

.sources { padding: 1em 0 3em; max-width: 70ch; margin-inline: auto; font-size: 1.05rem; line-height: 1.8; }
.sources h2 { display: inline; font-size: 1.8rem; }
.sources summary { cursor: pointer; margin-bottom: .6em; }
.sources ul { padding: 0 1.1em 0 0; }
a { color: var(--green-deep); text-underline-offset: 3px; }
a:hover { color: var(--mizan); }

@media (max-width: 860px) {
  .split, .lesson { grid-template-columns: 1fr; }
  .rule-columns { grid-template-columns: 1fr; }
  .rule-columns > div + div { border-right: 0; padding-right: 0; border-top: 1px solid var(--rule); padding-top: 1em; }
  .tools { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  body { font-size: 1.1rem; }
  .hero-sheet { margin-bottom: 46px; }
  .hero-sheet .inkwell { bottom: -42px; right: 0; }
  .folio { padding: 54px 26px; outline-offset: -11px; }
  .c-tl, .c-tr { top: 14px; } .c-bl, .c-br { bottom: 14px; }
  .c-tl, .c-bl { left: 14px; } .c-tr, .c-br { right: 14px; }
  .cuts { grid-template-columns: repeat(2, 1fr); }
  .letter-keys { grid-template-columns: repeat(auto-fill, minmax(44px, 1fr)); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

/* صفحة المراجعة الداخلية ?sheet */
.review-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; padding: 10px; }
.review-cell { position: relative; aspect-ratio: 10 / 9; border: 1px solid #998; }
.review-cell canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.contact-sheet .book { display: none; }
.review-cell.wide { grid-column: 1 / -1; aspect-ratio: 16.8 / 6.5; }
.review-cell span { position: absolute; top: 4px; right: 8px; font: 700 15px monospace; }