/* vd.css: صفحة الشرح بالفيديو /video/ (2026-10-15، طلب أحمد). كل الكلاسات بادئتها vd- عشان ماتتصادمش مع styles.css */
:root{--vd-bg:#0d1016;--vd-bg2:#141821;--vd-card:#181d28;--vd-line:#273042;--vd-ink:#eef2f8;--vd-mute:#9aa6bb;
  --vd-blue:#3b7bff;--vd-green:#22c55e;--vd-red:#ff3d3d;--vd-grad:linear-gradient(95deg,#1b4fd6,#16a34a);--vd-top:60px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body.vd{margin:0;background:var(--vd-bg);color:var(--vd-ink);font:15px/1.6 Inter,Tajawal,system-ui,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
body.vd:lang(ar){font-family:Tajawal,Inter,system-ui,sans-serif}
body.vd:lang(ja){font-family:Inter,"Hiragino Sans","Yu Gothic UI",Meiryo,sans-serif}
body.vd:lang(zh-Hans){font-family:Inter,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif}
.vd a{color:inherit}
.vd bdi{unicode-bidi:isolate}

/* الشريط اللي فوق */
.vd-top{position:sticky;top:0;z-index:50;height:var(--vd-top);display:flex;align-items:center;gap:14px;padding:0 20px;
  background:rgba(13,16,22,.92);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--vd-line)}
.vd-brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:17px;white-space:nowrap}
.vd-brand img{width:32px;height:32px;border-radius:8px}
.vd-brand .vd-yt{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:800;color:#fff;background:var(--vd-red);
  padding:3px 8px 3px 7px;border-radius:6px;letter-spacing:.2px}
.vd-brand .vd-yt svg{width:10px;height:10px}
.vd-tnav{display:flex;gap:4px;margin-inline-start:12px}
.vd-tnav a{text-decoration:none;color:var(--vd-mute);font-weight:600;font-size:14px;padding:7px 11px;border-radius:8px}
.vd-tnav a:hover{color:#fff;background:var(--vd-bg2)}
.vd-top-end{margin-inline-start:auto;display:flex;align-items:center;gap:10px}
.vd-lang{position:relative}
.vd-lang summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:7px;font-weight:700;font-size:13.5px;
  padding:7px 12px;border:1px solid var(--vd-line);border-radius:9px;color:var(--vd-ink);white-space:nowrap}
.vd-lang summary::-webkit-details-marker{display:none}
.vd-lang summary svg{width:16px;height:16px;opacity:.8}
.vd-lang[open] summary{background:var(--vd-bg2)}
.vd-lang-menu{position:absolute;inset-inline-end:0;top:calc(100% + 6px);background:var(--vd-card);border:1px solid var(--vd-line);
  border-radius:12px;padding:6px;min-width:170px;box-shadow:0 18px 40px rgba(0,0,0,.45);z-index:60}
.vd-lang-menu a{display:block;text-decoration:none;padding:8px 12px;border-radius:8px;font-size:14px;color:var(--vd-ink)}
.vd-lang-menu a:hover{background:var(--vd-bg2)}
.vd-lang-menu a[aria-current]{color:var(--vd-green);font-weight:800}
.vd-dl{text-decoration:none;background:var(--vd-grad);color:#fff;font-weight:800;font-size:13.5px;padding:9px 16px;border-radius:9px;white-space:nowrap}

/* التخطيط: العمود الأساسي (الفيديو) ثابت، والفصول بتتحرك جنبه */
.vd-main{max-width:1500px;margin:0 auto;padding:20px 20px 0;display:grid;grid-template-columns:minmax(0,1fr) 410px;
  grid-template-areas:"stage side" "info side";column-gap:24px;align-items:start}
/* الفيديو ثابت مكانه طول ما الصفحة بتتحرك (زي يوتيوب) */
.vd-stage{grid-area:stage;position:sticky;top:var(--vd-top);z-index:20;background:var(--vd-bg);padding:14px 0 12px;margin-top:-14px}
.vd-info{grid-area:info;min-width:0}
.vd-side{grid-area:side;position:sticky;top:calc(var(--vd-top) + 14px)}
.vd-frame{position:relative;aspect-ratio:16/9;background:#000;border-radius:14px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.55)}
.vd-frame iframe,.vd-frame #vdYT{position:absolute;inset:0;width:100%;height:100%;border:0}
.vd-cover{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;cursor:pointer;transition:opacity .4s}
.vd-bigplay{position:absolute;inset:0;margin:auto;width:84px;height:58px;border:0;border-radius:16px;background:var(--vd-red);cursor:pointer;
  display:grid;place-items:center;box-shadow:0 10px 30px rgba(0,0,0,.5);transition:transform .15s}
.vd-bigplay:hover{transform:scale(1.07)}
.vd-bigplay svg{width:26px;height:26px;fill:#fff}
.vd-ready .vd-cover,.vd-ready .vd-bigplay{opacity:0;pointer-events:none}

/* شريط الفصول تحت الفيديو (مقسّم زي يوتيوب) */
.vd-segs{display:flex;gap:3px;margin:10px 2px 0;height:8px}
.vd-seg{position:relative;flex-grow:var(--w);flex-basis:0;border:0;padding:0;height:100%;border-radius:3px;background:#2b3446;cursor:pointer;overflow:hidden}
.vd-seg i{position:absolute;inset-block:0;inset-inline-start:0;width:0;background:var(--vd-red);border-radius:3px}
.vd-seg:hover{background:#3a465d;transform:scaleY(1.5)}
.vd-seg.done i{width:100%}
.vd-seg.on{background:#3a465d}

/* الجملة اللي بتتقال دلوقتي: أهم حاجة تحت الفيديو */
.vd-say{margin-top:12px;background:var(--vd-card);border:1px solid var(--vd-line);border-radius:14px;padding:14px 18px 15px;min-height:118px;
  display:flex;flex-direction:column;justify-content:center;gap:4px;position:relative;overflow:hidden}
.vd-say::before{content:"";position:absolute;inset-block:0;inset-inline-start:0;width:4px;background:var(--vd-grad)}
.vd-say-k{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:800;color:var(--vd-mute);text-transform:uppercase;letter-spacing:.6px}
.vd-say-k .vd-dot{width:8px;height:8px;border-radius:50%;background:#56627a}
.vd-playing .vd-say-k .vd-dot{background:var(--vd-red);animation:vdPulse 1.2s infinite}
@keyframes vdPulse{50%{opacity:.25}}
.vd-say-k .vd-say-ch{margin-inline-start:auto;text-transform:none;letter-spacing:0;color:var(--vd-green);font-weight:700;font-size:12.5px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:60%}
.vd-say-prev,.vd-say-next{font-size:14px;color:#6f7b92;line-height:1.5;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-height:21px}
.vd-say-now{font-size:clamp(18px,1.75vw,24px);font-weight:800;line-height:1.45;color:#fff;transition:opacity .2s}
.vd-say-now.vd-fade{opacity:.15}

/* تحت الفيديو: العنوان والأزرار */
.vd-head{margin-top:14px}
.vd-h1{font-size:clamp(20px,2.1vw,27px);line-height:1.3;margin:0 0 8px;font-weight:800}
.vd-h1 em{font-style:normal;background:var(--vd-grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.vd-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.vd-chip{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:700;color:var(--vd-ink);background:var(--vd-bg2);
  border:1px solid var(--vd-line);padding:5px 11px;border-radius:999px;white-space:nowrap}
.vd-chip.cc{border-color:#1f6f43;color:#7ee2a6;background:#0f2a1c}
.vd-chip b{font-weight:800}
.vd-btn{display:inline-flex;align-items:center;gap:7px;font:inherit;font-size:13.5px;font-weight:800;color:#fff;background:#232a38;border:1px solid var(--vd-line);
  padding:8px 14px;border-radius:999px;cursor:pointer;text-decoration:none;white-space:nowrap}
.vd-btn:hover{background:#2c3546}
.vd-btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.vd-btn.yt svg{fill:var(--vd-red);stroke:none}
.vd-row .vd-sp{flex:1}
.vd-lead{color:var(--vd-mute);margin:10px 0 0;font-size:14.5px;max-width:860px}

/* لوحة «الجزء ده بيشرح إيه» */
.vd-now{margin-top:16px;background:var(--vd-card);border:1px solid var(--vd-line);border-radius:14px;padding:16px 18px}
.vd-now-k{font-size:12px;font-weight:800;color:var(--vd-mute);text-transform:uppercase;letter-spacing:.6px;display:flex;gap:8px;align-items:center}
.vd-now-k time{color:var(--vd-green)}
.vd-now h2{margin:4px 0 6px;font-size:19px;line-height:1.35}
.vd-now .vd-sum{margin:0;color:#c9d2e2;font-size:15px;line-height:1.75}
.vd-now .vd-rel{display:inline-flex;align-items:center;gap:6px;margin-top:10px;font-weight:800;font-size:13.5px;color:#8fb4ff;text-decoration:none}
.vd-now .vd-rel:hover{text-decoration:underline}
.vd-trd{margin-top:12px;border-top:1px solid var(--vd-line);padding-top:10px}
.vd-trd summary{cursor:pointer;font-weight:800;font-size:13.5px;color:var(--vd-ink);list-style:none;display:flex;align-items:center;gap:8px}
.vd-trd summary::-webkit-details-marker{display:none}
.vd-trd summary::after{content:"";width:8px;height:8px;border-inline-end:2px solid currentColor;border-block-end:2px solid currentColor;transform:rotate(45deg);margin-top:-4px}
.vd-trd[open] summary::after{transform:rotate(-135deg);margin-top:4px}
.vd-tr{margin-top:8px;max-height:300px;overflow:auto;padding-inline-end:4px;scrollbar-width:thin}
.vd-ln{display:flex;gap:12px;width:100%;text-align:start;font:inherit;font-size:14.5px;line-height:1.55;color:#aeb8ca;background:none;border:0;
  padding:6px 8px;border-radius:8px;cursor:pointer}
.vd-ln time{flex:0 0 auto;font-size:12px;font-weight:800;color:#7d8aa3;padding-top:2px;font-variant-numeric:tabular-nums;direction:ltr}
.vd-ln:hover{background:#202737;color:#fff}
.vd-ln.on{background:#1d2b45;color:#fff}
.vd-ln.on time{color:#8fb4ff}

/* قايمة الفصول (زي قايمة يوتيوب جنب الفيديو) */
.vd-side{background:var(--vd-bg2);border:1px solid var(--vd-line);border-radius:14px;overflow:hidden}
.vd-side-h{padding:14px 16px 10px;border-bottom:1px solid var(--vd-line)}
.vd-side-h h2{margin:0;font-size:17px;display:flex;align-items:center;gap:8px}
.vd-side-h h2 small{font-size:12.5px;color:var(--vd-mute);font-weight:600}
.vd-find{position:relative;margin-top:10px}
.vd-find svg{position:absolute;inset-inline-start:11px;top:50%;transform:translateY(-50%);width:17px;height:17px;stroke:var(--vd-mute);fill:none;stroke-width:2.2}
.vd-find input{width:100%;font:inherit;font-size:14px;color:var(--vd-ink);background:var(--vd-bg);border:1px solid var(--vd-line);border-radius:999px;
  padding:9px 14px 9px 38px;outline:none}
.vd-find input:lang(ar),[dir=rtl] .vd-find input{padding:9px 38px 9px 14px}
.vd-find input:focus{border-color:var(--vd-blue);box-shadow:0 0 0 3px rgba(59,123,255,.2)}
.vd-find-n{font-size:12.5px;color:var(--vd-mute);margin-top:7px;min-height:18px}
.vd-hits{display:flex;flex-direction:column;gap:2px;padding:0 10px}
.vd-hits:empty{display:none}
.vd-hit{display:block;text-align:start;font:inherit;font-size:13.5px;line-height:1.5;color:#c9d2e2;background:#1b2130;border:0;border-radius:9px;padding:8px 10px;cursor:pointer}
.vd-hit:hover{background:#243049}
.vd-hit small{display:block;font-size:11.5px;font-weight:800;color:var(--vd-green)}
.vd-hit mark{background:#5b4a00;color:#ffe27a;border-radius:3px;padding:0 2px}
.vd-list{list-style:none;margin:0;padding:8px;max-height:calc(100vh - var(--vd-top) - 190px);overflow:auto;scrollbar-width:thin}
.vd-ch{position:relative;border-radius:12px}
.vd-ch[hidden]{display:none}
.vd-ch-btn{display:flex;gap:11px;width:100%;text-align:start;font:inherit;color:inherit;background:none;border:0;padding:7px;border-radius:12px;cursor:pointer}
.vd-ch-btn:hover{background:#1d2331}
.vd-ch.on .vd-ch-btn{background:#1f2738;box-shadow:inset 0 0 0 1px #33415c}
.vd-th{position:relative;flex:0 0 158px;aspect-ratio:16/9;border-radius:9px;overflow:hidden;background:#000}
.vd-th img{width:100%;height:100%;object-fit:cover;display:block}
.vd-th .vd-t{position:absolute;inset-inline-end:5px;bottom:7px;font-size:11.5px;font-weight:800;color:#fff;background:rgba(0,0,0,.82);padding:1px 6px;border-radius:5px;direction:ltr}
.vd-th .vd-n{position:absolute;inset-inline-start:5px;top:5px;min-width:22px;height:22px;display:grid;place-items:center;font-size:12px;font-weight:800;
  color:#fff;background:rgba(0,0,0,.72);border-radius:6px;padding:0 5px}
.vd-ch.on .vd-th .vd-n{background:var(--vd-red)}
.vd-th .vd-pg{position:absolute;inset-inline:0;bottom:0;height:3px;background:rgba(255,255,255,.18)}
.vd-th .vd-pg i{display:block;height:100%;width:0;background:var(--vd-red)}
.vd-ch.seen .vd-th .vd-pg i{width:100%}
.vd-th .vd-eq{position:absolute;inset:0;display:none;place-items:center;background:rgba(0,0,0,.45)}
.vd-th .vd-eq span{display:flex;gap:3px;align-items:flex-end;height:20px}
.vd-th .vd-eq b{width:4px;background:#fff;border-radius:2px;animation:vdEq .9s infinite ease-in-out}
.vd-th .vd-eq b:nth-child(2){animation-delay:.2s}.vd-th .vd-eq b:nth-child(3){animation-delay:.4s}
@keyframes vdEq{0%,100%{height:5px}50%{height:20px}}
.vd-playing .vd-ch.on .vd-eq{display:grid}
.vd-ct{min-width:0;display:flex;flex-direction:column;gap:3px;padding-top:1px;padding-inline-end:30px}
.vd-ct strong{font-size:14.5px;line-height:1.35;font-weight:800;color:#fff}
.vd-ct .vd-sum{font-size:12.8px;line-height:1.5;color:var(--vd-mute);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.vd-new{align-self:flex-start;display:inline-block;font-size:10.5px;font-weight:800;color:#0d1016;background:#ffd23f;border-radius:5px;padding:0 6px;margin-inline-start:4px;vertical-align:2px}
.vd-shr{position:absolute;inset-inline-end:8px;top:8px;width:30px;height:30px;border-radius:50%;border:0;background:rgba(13,16,22,.8);color:#fff;
  display:grid;place-items:center;cursor:pointer;opacity:0;transition:opacity .15s}
.vd-shr svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2.3;stroke-linecap:round;stroke-linejoin:round}
.vd-ch:hover .vd-shr,.vd-ch.on .vd-shr,.vd-shr:focus{opacity:1}
.vd-ch-x{display:none}
.vd-flash{animation:vdFlash 1.4s}
@keyframes vdFlash{0%,60%{box-shadow:0 0 0 2px var(--vd-green)}100%{box-shadow:0 0 0 0 transparent}}

/* تحت الصفحة */
.vd-sec{max-width:1500px;margin:34px auto 0;padding:0 20px}
.vd-sec h2{font-size:20px;margin:0 0 14px}
.vd-more{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.vd-mv{text-decoration:none;display:flex;flex-direction:column;gap:8px}
.vd-mv span.vd-mi{position:relative;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:#000}
.vd-mv img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .3s}
.vd-mv:hover img{transform:scale(1.04)}
.vd-mv span.vd-mi i{position:absolute;inset-inline-end:6px;bottom:6px;font-style:normal;font-size:11.5px;font-weight:800;background:rgba(0,0,0,.82);color:#fff;padding:1px 6px;border-radius:5px}
.vd-mv b{font-size:14px;line-height:1.4}
.vd-cta{margin:40px auto 0;max-width:1460px;border-radius:18px;padding:28px 26px;background:radial-gradient(120% 140% at 0% 0%,#1b3f9a 0%,#0f2a1c 60%,#0d1016 100%);
  border:1px solid #24406e;display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.vd-cta h2{margin:0 0 4px;font-size:22px}
.vd-cta p{margin:0;color:#c9d2e2}
.vd-cta .vd-cta-b{margin-inline-start:auto;display:flex;gap:10px;flex-wrap:wrap}
.vd-cta a{text-decoration:none;font-weight:800;padding:12px 20px;border-radius:11px;white-space:nowrap}
.vd-cta a.p{background:#fff;color:#0d1016}
.vd-cta a.s{border:1.5px solid #7ea6ff;color:#dbe6ff}
.vd-foot{margin-top:46px;border-top:1px solid var(--vd-line);padding:22px 20px 34px;text-align:center;color:var(--vd-mute);font-size:13px}
.vd-foot nav{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 16px;margin-bottom:10px}
.vd-foot a{text-decoration:none;color:#b9c4d8}
.vd-foot a:hover{color:#fff}
.vd-toast{position:fixed;left:50%;bottom:26px;transform:translate(-50%,30px);opacity:0;background:#fff;color:#0d1016;font-weight:800;font-size:14px;
  padding:10px 18px;border-radius:999px;box-shadow:0 10px 30px rgba(0,0,0,.45);transition:.25s;z-index:90;pointer-events:none}
.vd-toast.show{opacity:1;transform:translate(-50%,0)}
.vd-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* تابلت: الفصول تحت الفيديو */
@media(max-width:1080px){
  .vd-main{grid-template-columns:minmax(0,1fr);grid-template-areas:"stage" "info" "side";gap:0}
  .vd-side{position:static;margin-top:16px}
  .vd-list{max-height:none}
  .vd-more{grid-template-columns:repeat(2,minmax(0,1fr))}
}
/* موبايل: الفيديو ثابت فوق والجملة تحته زي تطبيق يوتيوب */
@media(max-width:760px){
  :root{--vd-top:54px}
  .vd-top{padding:0 12px;gap:8px}
  .vd-tnav{display:none}
  .vd-brand{font-size:15px;gap:7px}
  .vd-brand img{width:28px;height:28px}
  .vd-brand .vd-yt{display:none}
  .vd-lang summary{padding:6px 9px;font-size:12.5px}
  .vd-lang summary .vd-ln-name{display:none}
  .vd-dl{padding:8px 11px;font-size:12.5px}
  .vd-main{padding:0;gap:0}
  .vd-stage{top:var(--vd-top);padding:0 0 8px;margin-top:0;box-shadow:0 10px 18px rgba(0,0,0,.4)}
  .vd-frame{border-radius:0}
  .vd-segs{margin:6px 12px 0;height:6px}
  .vd-say{margin:8px 12px 0;min-height:0;padding:9px 12px 10px;border-radius:12px}
  .vd-say-prev,.vd-say-next{display:none}
  .vd-say-now{font-size:16px;line-height:1.45;min-height:46px}
  .vd-say-k{font-size:11px}
  .vd-info{padding:0 16px}
  .vd-side{margin:14px 12px 0;border-radius:14px}
  .vd-ch{scroll-margin-top:calc(var(--vd-top) + 56vw + 120px)}
  .vd-th{flex-basis:132px}
  .vd-ct .vd-sum{-webkit-line-clamp:2}
  .vd-shr{opacity:1;width:28px;height:28px}
  .vd-sec{padding:0 16px}
  .vd-more{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .vd-cta{margin:30px 12px 0;padding:22px 18px}
  .vd-cta .vd-cta-b{margin-inline-start:0;width:100%}
  .vd-cta a{flex:1;text-align:center}
}
@media(max-width:380px){.vd-dl{display:none}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}html{scroll-behavior:auto}}