/* ==========================================================================
   Rozewail — Student UI  (v3)
   Mobile-first, RTL, no framework. Works inside Android/iOS WebView.
   ========================================================================== */

/* ---------- Tokens ---------- */
:root{
  --brand:#4f5bf5; --brand-600:#3d47d8; --brand-700:#2f37b0; --brand-50:#eef0ff; --brand-100:#dfe3ff;
  --accent:#ff7a45; --accent-50:#fff1ea;
  --ok:#0fb981; --ok-50:#e6f8f1; --warn:#f59e0b; --warn-50:#fff6e5; --bad:#ef4467; --bad-50:#fdecf0; --info:#0ea5e9; --info-50:#e7f6fd;

  --bg:#f4f5fb; --surface:#fff; --surface-2:#f7f8fc; --line:#e6e8f2; --line-2:#d9dcea;
  --ink:#111633; --ink-2:#4a5073; --ink-3:#8a90ae;

  --r-sm:10px; --r:16px; --r-lg:22px; --r-xl:28px;
  --sh-1:0 1px 2px rgba(17,22,51,.05),0 1px 3px rgba(17,22,51,.04);
  --sh-2:0 6px 20px -6px rgba(17,22,51,.12),0 2px 6px rgba(17,22,51,.04);
  --sh-3:0 18px 50px -12px rgba(17,22,51,.28);
  --grad:linear-gradient(135deg,#4f5bf5 0%,#7b4ff5 55%,#b44ff0 100%);

  --top-h:60px; --nav-h:66px; --side-w:268px;
  --safe-t:env(safe-area-inset-top,0px); --safe-b:env(safe-area-inset-bottom,0px);
  --font:"Cairo",system-ui,-apple-system,"Segoe UI",Tahoma,sans-serif;
  color-scheme:light;
}
:root[data-theme="dark"]{
  --bg:#0b0e1c; --surface:#141830; --surface-2:#1b2040; --line:#262c4f; --line-2:#323a66;
  --ink:#eef0fa; --ink-2:#b4b9d6; --ink-3:#7a80a3;
  --brand-50:rgba(99,110,255,.16); --brand-100:rgba(99,110,255,.26);
  --accent-50:rgba(255,122,69,.14); --ok-50:rgba(15,185,129,.14); --warn-50:rgba(245,158,11,.14);
  --bad-50:rgba(239,68,103,.15); --info-50:rgba(14,165,233,.14);
  --sh-1:0 1px 2px rgba(0,0,0,.3); --sh-2:0 8px 24px -8px rgba(0,0,0,.55); --sh-3:0 20px 60px -10px rgba(0,0,0,.7);
  color-scheme:dark;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;min-height:100vh;min-height:100dvh;background:var(--bg);color:var(--ink);font-family:var(--font);
  font-size:15px;line-height:1.65;direction:rtl;text-align:right;-webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;overscroll-behavior-y:none}
img,svg,video,iframe{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0;padding:0}
h1,h2,h3,h4,h5,p{margin:0}
h1{font-size:1.5rem;line-height:1.35;font-weight:800}
h2{font-size:1.25rem;line-height:1.4;font-weight:800}
h3{font-size:1.06rem;line-height:1.45;font-weight:700}
hr{border:0;border-top:1px solid var(--line);margin:16px 0}
::selection{background:var(--brand-100)}
:focus-visible{outline:3px solid var(--brand-100);outline-offset:2px;border-radius:8px}
.i{width:20px;height:20px;flex:none;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.i-sm{width:16px;height:16px}.i-lg{width:26px;height:26px}.i-xl{width:40px;height:40px}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* ---------- Shell ---------- */
.topbar{position:fixed;inset-inline:0;top:0;z-index:40;height:calc(var(--top-h) + var(--safe-t));padding-top:var(--safe-t);
  background:color-mix(in srgb,var(--surface) 88%,transparent);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line)}
@supports not (background:color-mix(in srgb,red,blue)){.topbar{background:var(--surface)}}
.topbar-in{height:var(--top-h);display:flex;align-items:center;gap:10px;padding:0 14px;max-width:1280px;margin:0 auto}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.1rem;min-width:0}
.brand img{width:36px;height:36px;border-radius:11px;object-fit:contain;background:var(--brand-50);padding:3px}
.brand span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar .spacer{flex:1}
.icon-btn{position:relative;width:42px;height:42px;border-radius:13px;display:inline-grid;place-items:center;color:var(--ink-2);transition:background .15s}
.icon-btn:active,.icon-btn:hover{background:var(--surface-2);color:var(--ink)}
.dot-count{position:absolute;top:5px;left:5px;min-width:18px;height:18px;padding:0 5px;border-radius:9px;background:var(--bad);color:#fff;
  font-size:11px;font-weight:700;line-height:18px;text-align:center;box-shadow:0 0 0 2px var(--surface)}
.avatar{width:38px;height:38px;border-radius:50%;object-fit:cover;background:var(--brand-50);border:2px solid var(--surface);box-shadow:0 0 0 1px var(--line)}
.avatar-lg{width:64px;height:64px}

.main{padding:calc(var(--top-h) + var(--safe-t) + 16px) 0 calc(var(--nav-h) + var(--safe-b) + 24px);min-height:100dvh}
.wrap{max-width:1180px;margin:0 auto;padding:0 16px}
.wrap-sm{max-width:640px}.wrap-md{max-width:860px}

/* Sidebar (desktop) */
.sidebar{display:none}
.side-link,.drawer-link{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:13px;color:var(--ink-2);font-weight:600;transition:background .15s,color .15s}
.side-link:hover,.drawer-link:hover{background:var(--surface-2);color:var(--ink)}
.side-link.active,.drawer-link.active{background:var(--brand-50);color:var(--brand)}
.side-link.active .i{stroke-width:2.4}
.side-sep{height:1px;background:var(--line);margin:10px 6px}
.side-title{font-size:.75rem;color:var(--ink-3);font-weight:700;padding:6px 14px}

/* Bottom nav (mobile) */
.bottom-nav{position:fixed;inset-inline:0;bottom:0;z-index:40;height:calc(var(--nav-h) + var(--safe-b));padding:0 6px var(--safe-b);
  background:var(--surface);border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(5,1fr);box-shadow:0 -6px 24px -12px rgba(17,22,51,.18)}
.bn-item{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:var(--ink-3);font-size:11.5px;font-weight:700;position:relative}
.bn-item .i{width:23px;height:23px}
.bn-item.active{color:var(--brand)}
.bn-item.active::before{content:"";position:absolute;top:0;width:28px;height:3px;border-radius:0 0 4px 4px;background:var(--brand)}
.bn-fab{display:flex;flex-direction:column;align-items:center;justify-content:flex-start;gap:3px;color:var(--ink-2);font-size:11.5px;font-weight:700}
.bn-fab span.fab{width:52px;height:52px;border-radius:18px;background:var(--grad);color:#fff;display:grid;place-items:center;margin-top:-18px;
  box-shadow:0 10px 22px -6px rgba(79,91,245,.6),0 0 0 5px var(--surface)}
.bn-fab.active{color:var(--brand)}

@media (min-width:1024px){
  .sidebar{display:flex;flex-direction:column;position:fixed;top:calc(var(--top-h) + var(--safe-t));bottom:0;right:0;width:var(--side-w);
    padding:18px 14px;background:var(--surface);border-left:1px solid var(--line);overflow-y:auto;z-index:30}
  .main{padding-right:var(--side-w);padding-bottom:40px}
  .bottom-nav,.only-mobile{display:none!important}
  .topbar-in{max-width:none;padding:0 22px}
}
@media (max-width:1023.98px){.only-desktop{display:none!important}}

/* Focus mode (exam) */
body.focus .bottom-nav,body.focus .sidebar{display:none!important}
body.focus .main{padding-right:0;padding-bottom:calc(96px + var(--safe-b))}

/* ---------- Sheet / Drawer / Modal ---------- */
.backdrop{position:fixed;inset:0;z-index:60;background:rgba(9,12,30,.5);opacity:0;pointer-events:none;transition:opacity .22s}
.backdrop.show{opacity:1;pointer-events:auto}
.sheet{position:fixed;z-index:61;inset-inline:0;bottom:0;max-height:88dvh;background:var(--surface);border-radius:var(--r-xl) var(--r-xl) 0 0;
  box-shadow:var(--sh-3);transform:translateY(105%);transition:transform .28s cubic-bezier(.2,.8,.2,1),visibility 0s .28s;visibility:hidden;display:flex;flex-direction:column;padding-bottom:var(--safe-b)}
.sheet.show{transform:none;visibility:visible;transition:transform .28s cubic-bezier(.2,.8,.2,1)}
.sheet-grab{width:44px;height:5px;border-radius:3px;background:var(--line-2);margin:10px auto 4px;flex:none}
.sheet-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 18px 12px;flex:none}
.sheet-body{overflow-y:auto;padding:0 12px 16px;-webkit-overflow-scrolling:touch}
@media (min-width:768px){
  .sheet{inset:auto;top:50%;left:50%;bottom:auto;width:min(480px,92vw);border-radius:var(--r-xl);transform:translate(-50%,-46%) scale(.97);opacity:0;
    transition:transform .22s,opacity .22s,visibility 0s .22s;pointer-events:none;padding-bottom:0}
  .sheet.show{transform:translate(-50%,-50%);opacity:1;pointer-events:auto;transition:transform .22s,opacity .22s}
  .sheet-grab{display:none}
  .sheet.sheet-side{top:0;bottom:0;left:0;right:auto;width:380px;border-radius:0;transform:translateX(-100%);opacity:1;max-height:none;pointer-events:auto}
  .sheet.sheet-side.show{transform:none}
}
.drawer-user{display:flex;align-items:center;gap:12px;padding:6px 8px 14px}
.drawer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;padding:4px 4px 12px}
.tile{display:flex;flex-direction:column;align-items:center;gap:8px;padding:14px 6px;border-radius:var(--r);background:var(--surface-2);font-size:.82rem;font-weight:700;color:var(--ink-2);text-align:center}
.tile .ic{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:var(--brand-50);color:var(--brand)}
.tile.active{outline:2px solid var(--brand-100)}

/* Dialog (confirm) */
.dialog-ic{width:64px;height:64px;border-radius:22px;display:grid;place-items:center;margin:4px auto 12px}
.dialog-ic.warn{background:var(--warn-50);color:var(--warn)} .dialog-ic.ok{background:var(--ok-50);color:var(--ok)}
.dialog-ic.bad{background:var(--bad-50);color:var(--bad)} .dialog-ic.info{background:var(--brand-50);color:var(--brand)}

/* Toasts */
.toasts{position:fixed;z-index:80;top:calc(var(--top-h) + var(--safe-t) + 10px);inset-inline:12px;display:flex;flex-direction:column;align-items:center;gap:8px;pointer-events:none}
.toast{pointer-events:auto;display:flex;align-items:flex-start;gap:10px;width:min(460px,100%);padding:12px 14px;border-radius:15px;background:var(--ink);color:var(--surface);
  box-shadow:var(--sh-3);font-weight:600;font-size:.92rem;animation:toastIn .28s cubic-bezier(.2,.8,.2,1)}
:root[data-theme="dark"] .toast{background:#262c52;color:#fff}
.toast .i{margin-top:2px}.toast.ok .i{color:#35e0a6}.toast.bad .i{color:#ff7a93}.toast.warn .i{color:#ffc34d}.toast.info .i{color:#8ea0ff}
.toast.out{animation:toastOut .2s forwards}
@keyframes toastIn{from{opacity:0;transform:translateY(-12px) scale(.98)}}
@keyframes toastOut{to{opacity:0;transform:translateY(-8px)}}

/* ---------- Page heading ---------- */
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:18px}
.page-head .sub{color:var(--ink-3);font-size:.9rem;margin-top:2px}
.back{display:inline-flex;align-items:center;gap:6px;color:var(--ink-3);font-weight:700;font-size:.88rem;margin-bottom:8px}
.section-title{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:26px 0 12px}
.section-title h2{font-size:1.1rem;display:flex;align-items:center;gap:8px}
.section-title a{color:var(--brand);font-weight:700;font-size:.88rem}
.count{display:inline-grid;place-items:center;min-width:24px;height:24px;padding:0 7px;border-radius:12px;background:var(--surface-2);border:1px solid var(--line);font-size:.78rem;color:var(--ink-2)}

/* ---------- Cards ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1)}
.card-pad{padding:18px}
@media (min-width:768px){.card-pad{padding:24px}}
.card-link{transition:transform .15s,box-shadow .15s,border-color .15s}
.card-link:hover{box-shadow:var(--sh-2);border-color:var(--line-2)}
.card-link:active{transform:scale(.985)}

.hero{position:relative;overflow:hidden;border-radius:var(--r-xl);background:var(--grad);color:#fff;padding:22px 20px;box-shadow:0 18px 40px -18px rgba(79,91,245,.75)}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.12)}
.hero::before{width:220px;height:220px;left:-60px;top:-90px}
.hero::after{width:140px;height:140px;left:70px;bottom:-80px;background:rgba(255,255,255,.08)}
.hero>*{position:relative;z-index:1}
.hero .hi{font-size:.92rem;opacity:.9;font-weight:600}
.hero h1{font-size:1.45rem;margin-top:2px}
.hero p{opacity:.88;font-size:.92rem;margin-top:6px;max-width:48ch}
.hero-stats{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}
.hero-stat{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.2);border-radius:14px;padding:8px 14px;min-width:92px;backdrop-filter:blur(6px)}
.hero-stat b{display:block;font-size:1.2rem;line-height:1.3}
.hero-stat small{opacity:.85;font-size:.78rem;font-weight:600}
@media (min-width:768px){.hero{padding:30px 32px}.hero h1{font-size:1.8rem}}

/* Quick actions */
.quick{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:16px}
.quick a{display:flex;flex-direction:column;align-items:center;gap:7px;padding:12px 4px;border-radius:var(--r);background:var(--surface);border:1px solid var(--line);
  font-size:.8rem;font-weight:700;color:var(--ink-2);text-align:center;line-height:1.35}
.quick .ic{width:44px;height:44px;border-radius:15px;display:grid;place-items:center}
.ic-brand{background:var(--brand-50);color:var(--brand)} .ic-accent{background:var(--accent-50);color:var(--accent)}
.ic-ok{background:var(--ok-50);color:var(--ok)} .ic-info{background:var(--info-50);color:var(--info)} .ic-warn{background:var(--warn-50);color:var(--warn)} .ic-bad{background:var(--bad-50);color:var(--bad)}
@media (min-width:768px){.quick{grid-template-columns:repeat(4,minmax(0,170px))}.quick a{flex-direction:row;justify-content:flex-start;padding:12px 14px;font-size:.9rem;text-align:right}}

/* Grids */
.grid{display:grid;gap:14px;grid-template-columns:1fr}
@media (min-width:600px){.grid-2,.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1000px){.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}}
.grid-products{display:grid;gap:12px;grid-template-columns:repeat(2,1fr)}
@media (min-width:700px){.grid-products{grid-template-columns:repeat(3,1fr)}}
@media (min-width:1100px){.grid-products{grid-template-columns:repeat(4,1fr)}}
.stack>*+*{margin-top:12px}
.row{display:flex;align-items:center;gap:10px}
.row-wrap{flex-wrap:wrap}.between{justify-content:space-between}.grow{flex:1;min-width:0}

/* Group card */
.gcard{display:flex;flex-direction:column;overflow:hidden;position:relative}
.gcard-top{padding:16px 16px 14px;display:flex;gap:12px;align-items:flex-start}
.subj{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;color:#fff;font-weight:800;font-size:1.15rem;flex:none;box-shadow:0 8px 16px -8px rgba(0,0,0,.35)}
.s0{background:linear-gradient(135deg,#4f5bf5,#8a5cf6)} .s1{background:linear-gradient(135deg,#ff7a45,#ff4f7b)} .s2{background:linear-gradient(135deg,#0fb981,#0ea5e9)}
.s3{background:linear-gradient(135deg,#f59e0b,#f97316)} .s4{background:linear-gradient(135deg,#ec4899,#8b5cf6)} .s5{background:linear-gradient(135deg,#14b8a6,#4f5bf5)}
.gcard h3{font-size:1rem;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.gcard .by{color:var(--ink-3);font-size:.85rem;font-weight:600;margin-top:1px}
.meta{display:flex;flex-wrap:wrap;gap:6px 14px;padding:0 16px 14px;color:var(--ink-2);font-size:.85rem}
.meta span{display:inline-flex;align-items:center;gap:6px}
.meta .i{width:16px;height:16px;color:var(--ink-3)}
.gcard-foot{margin-top:auto;border-top:1px dashed var(--line);padding:11px 16px;display:flex;align-items:center;justify-content:space-between;gap:8px;font-weight:700;font-size:.88rem}
.gcard-foot .go{color:var(--brand);display:inline-flex;align-items:center;gap:4px}
.gcard.pending{opacity:.92}
.gcard.pending .subj{filter:grayscale(.5)}

/* Lesson / exam cards */
.lesson{display:flex;gap:14px;padding:14px;align-items:center}
.lesson-thumb{width:64px;height:64px;border-radius:18px;display:grid;place-items:center;flex:none;position:relative}
.lesson-thumb.locked{background:var(--surface-2);color:var(--ink-3);border:1px solid var(--line)}
.lesson-thumb.open{background:var(--grad);color:#fff}
.lesson h3{font-size:.98rem}
.lesson p{color:var(--ink-3);font-size:.83rem;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.lesson .act{flex:none}
@media (max-width:420px){.lesson{flex-wrap:wrap}.lesson .act{width:100%}.lesson .act .btn{width:100%}}

/* Product card */
.pcard{overflow:hidden;display:flex;flex-direction:column}
.pcard-img{aspect-ratio:4/3;background:var(--surface-2);overflow:hidden}
.pcard-img img{width:100%;height:100%;object-fit:cover}
.pcard-body{padding:12px;display:flex;flex-direction:column;gap:4px;flex:1}
.pcard h3{font-size:.93rem;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.pcard p{color:var(--ink-3);font-size:.8rem;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.price{font-weight:800;color:var(--brand);font-size:1rem;margin-top:auto;padding-top:6px}
.price small{font-size:.72rem;color:var(--ink-3);font-weight:700}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 18px;border-radius:14px;font-weight:700;font-size:.95rem;
  border:1px solid transparent;transition:transform .12s,background .15s,box-shadow .15s,opacity .15s;white-space:nowrap;user-select:none;-webkit-user-select:none;text-align:center}
.btn:active{transform:scale(.97)}
.btn[disabled],.btn.is-loading{opacity:.6;pointer-events:none}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px -8px rgba(79,91,245,.7)}
.btn-primary:hover{background:var(--brand-600)}
.btn-grad{background:var(--grad);color:#fff;box-shadow:0 10px 22px -10px rgba(79,91,245,.8)}
.btn-soft{background:var(--brand-50);color:var(--brand)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{background:var(--surface-2)}
.btn-ok{background:var(--ok);color:#fff}.btn-bad{background:var(--bad);color:#fff}.btn-bad-soft{background:var(--bad-50);color:var(--bad)}
.btn-white{background:#fff;color:var(--brand-700)}
.btn-sm{min-height:36px;padding:0 13px;border-radius:11px;font-size:.85rem}
.btn-lg{min-height:54px;padding:0 24px;border-radius:17px;font-size:1.02rem}
.btn-block{width:100%}
.btn-icon{width:46px;padding:0}
.btn .spin{display:none}
.btn.is-loading .spin{display:inline-block}
.spin{width:18px;height:18px;border-radius:50%;border:2.5px solid currentColor;border-top-color:transparent;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Badges ---------- */
.badge{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:999px;font-size:.76rem;font-weight:700;line-height:1.5;white-space:nowrap}
.b-ok{background:var(--ok-50);color:var(--ok)} .b-warn{background:var(--warn-50);color:#c77c00} .b-bad{background:var(--bad-50);color:var(--bad)}
.b-info{background:var(--brand-50);color:var(--brand)} .b-muted{background:var(--surface-2);color:var(--ink-3);border:1px solid var(--line)}
:root[data-theme="dark"] .b-warn{color:#ffc34d}

/* ---------- Alerts ---------- */
.alert{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border-radius:15px;font-weight:600;font-size:.9rem;margin-bottom:14px;border:1px solid transparent}
.alert .i{margin-top:2px}
.alert p{margin:0}
.alert-info{background:var(--brand-50);color:var(--brand-700);border-color:var(--brand-100)}
:root[data-theme="dark"] .alert-info{color:#b9c0ff}
.alert-ok{background:var(--ok-50);color:#067a56} :root[data-theme="dark"] .alert-ok{color:#5fe0b5}
.alert-bad{background:var(--bad-50);color:#c0203f} :root[data-theme="dark"] .alert-bad{color:#ff8ea3}
.alert-warn{background:var(--warn-50);color:#9a5d00} :root[data-theme="dark"] .alert-warn{color:#ffcf70}
.alert a{text-decoration:underline;font-weight:800}
.alert .x{margin-inline-start:auto;opacity:.6;padding:2px}

/* ---------- Forms ---------- */
.field{margin-bottom:16px}
.label{display:block;font-weight:700;font-size:.88rem;margin-bottom:7px;color:var(--ink-2)}
.label .opt{color:var(--ink-3);font-weight:600}
.input,.select,.textarea{width:100%;min-height:52px;padding:12px 15px;border-radius:15px;background:var(--surface-2);border:1.5px solid var(--line);
  font-size:16px;color:var(--ink);transition:border-color .15s,box-shadow .15s,background .15s;-webkit-appearance:none;appearance:none}
.textarea{min-height:110px;resize:vertical;line-height:1.6}
.input::placeholder,.textarea::placeholder{color:var(--ink-3)}
.input:focus,.select:focus,.textarea:focus{outline:0;border-color:var(--brand);background:var(--surface);box-shadow:0 0 0 4px var(--brand-50)}
.input:disabled,.select:disabled{opacity:.7;background:var(--surface-2)}
.select{padding-left:42px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%238a90ae' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:left 14px center}
.select.loading{background-image:none}
.is-invalid{border-color:var(--bad)!important}
.invalid{color:var(--bad);font-size:.82rem;font-weight:700;margin-top:6px;display:block}
.hint{color:var(--ink-3);font-size:.8rem;margin-top:6px}
.input-wrap{position:relative}
.input-wrap .lead{position:absolute;top:50%;right:15px;transform:translateY(-50%);color:var(--ink-3);pointer-events:none}
.input-wrap .input{padding-right:46px}
.input-wrap .trail{position:absolute;top:50%;left:6px;transform:translateY(-50%);width:42px;height:42px;border-radius:12px;display:grid;place-items:center;color:var(--ink-3)}
.input-wrap .trail+.input,.input-wrap .input.has-trail{padding-left:50px}
.ltr{direction:ltr;text-align:right}
.check{display:flex;align-items:center;gap:10px;font-weight:600;font-size:.9rem;cursor:pointer;user-select:none}
.check input{width:22px;height:22px;accent-color:var(--brand)}
.seg{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.seg label{position:relative}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg span{display:flex;align-items:center;justify-content:center;gap:8px;min-height:50px;border-radius:14px;border:1.5px solid var(--line);background:var(--surface-2);font-weight:700;cursor:pointer}
.seg input:checked+span{border-color:var(--brand);background:var(--brand-50);color:var(--brand)}
.form-grid{display:grid;gap:0 16px;grid-template-columns:1fr}
@media (min-width:720px){.form-grid{grid-template-columns:1fr 1fr}.form-grid .full{grid-column:1/-1}}

/* Option cards (radio groups: reservation / change group) */
.opts{display:grid;gap:10px}
.opt-card{position:relative;display:block}
.opt-card input{position:absolute;opacity:0;pointer-events:none}
.opt-card .box{display:flex;align-items:center;gap:12px;padding:14px;border-radius:16px;border:1.5px solid var(--line);background:var(--surface);cursor:pointer;transition:border-color .15s,background .15s}
.opt-card .radio{width:22px;height:22px;border-radius:50%;border:2px solid var(--line-2);flex:none;display:grid;place-items:center;transition:.15s}
.opt-card input:checked+.box{border-color:var(--brand);background:var(--brand-50)}
.opt-card input:checked+.box .radio{border-color:var(--brand);background:var(--brand);box-shadow:inset 0 0 0 4px var(--surface)}
.opt-card .t{font-weight:700;font-size:.93rem}
.opt-card .s{color:var(--ink-3);font-size:.82rem;font-weight:600}
.opt-card.full .box{opacity:.55;cursor:not-allowed;background:var(--surface-2)}

/* Steps */
.steps{display:flex;gap:6px;margin-bottom:18px}
.steps i{flex:1;height:5px;border-radius:3px;background:var(--line);transition:background .25s}
.steps i.on{background:var(--brand)}

/* ---------- Tabs ---------- */
.tabs{display:flex;gap:4px;padding:4px;border-radius:15px;background:var(--surface-2);border:1px solid var(--line);margin-bottom:16px;overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{flex:1;min-height:40px;padding:0 14px;border-radius:11px;font-weight:700;font-size:.9rem;color:var(--ink-3);display:flex;align-items:center;justify-content:center;gap:7px;white-space:nowrap}
.tab.active{background:var(--surface);color:var(--ink);box-shadow:var(--sh-1)}
.tab .count{height:20px;min-width:20px;font-size:.72rem}
[data-pane]{display:none}[data-pane].active{display:block;animation:fade .25s}
@keyframes fade{from{opacity:0;transform:translateY(4px)}}

/* ---------- Empty ---------- */
.empty{text-align:center;padding:34px 18px}
.empty .ic{width:76px;height:76px;border-radius:26px;margin:0 auto 14px;display:grid;place-items:center;background:var(--brand-50);color:var(--brand)}
.empty h3{margin-bottom:4px}
.empty p{color:var(--ink-3);font-size:.9rem;margin-bottom:16px}

/* ---------- Lists ---------- */
.list{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden}
.li{display:flex;align-items:center;gap:12px;padding:14px 16px}
.li+.li{border-top:1px solid var(--line)}
.li .ic{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;flex:none}
.li .t{font-weight:700;font-size:.93rem}
.li .s{color:var(--ink-3);font-size:.8rem}
.li .end{margin-inline-start:auto;text-align:left;flex:none}
.amount{font-weight:800;font-size:1rem;direction:ltr;display:inline-block}
.amount.plus{color:var(--ok)} .amount.minus{color:var(--bad)}
.unread{background:var(--brand-50)}
.unread .t::after{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--brand);margin-inline-start:8px;vertical-align:middle}

/* Notification items */
.notif{display:flex;gap:12px;padding:12px;border-radius:15px;transition:background .15s}
.notif:hover{background:var(--surface-2)}
.notif .ic{width:40px;height:40px;border-radius:13px;display:grid;place-items:center;flex:none;background:var(--brand-50);color:var(--brand)}
.notif .t{font-weight:700;font-size:.9rem;line-height:1.5}
.notif .b{color:var(--ink-2);font-size:.83rem;line-height:1.6;margin-top:2px;word-break:break-word}
.notif .d{color:var(--ink-3);font-size:.75rem;font-weight:600;margin-top:4px}
.notif.new{background:var(--brand-50)}
.notif.new .t::before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--brand);margin-inline-end:6px;vertical-align:middle}

/* ---------- Score ring & progress ---------- */
.ring{--p:0;--c:var(--brand);width:84px;height:84px;border-radius:50%;flex:none;display:grid;place-items:center;
  background:conic-gradient(var(--c) calc(var(--p)*1%),var(--line) 0);position:relative}
.ring::before{content:"";position:absolute;inset:8px;border-radius:50%;background:var(--surface)}
.ring b{position:relative;font-size:1.1rem;font-weight:800;direction:ltr}
.ring-lg{width:140px;height:140px}.ring-lg::before{inset:12px}.ring-lg b{font-size:2rem}
.ring-sm{width:58px;height:58px}.ring-sm::before{inset:6px}.ring-sm b{font-size:.85rem}
.progress{height:8px;border-radius:5px;background:var(--line);overflow:hidden}
.progress>i{display:block;height:100%;background:var(--grad);border-radius:5px;transition:width .3s}

/* ---------- Exam ---------- */
.exam-bar{position:sticky;top:calc(var(--top-h) + var(--safe-t));z-index:20;background:var(--bg);padding:10px 0 12px;margin-bottom:6px}
.exam-bar .row{margin-bottom:10px}
.timer{display:inline-flex;align-items:center;gap:7px;padding:7px 13px;border-radius:12px;background:var(--surface);border:1px solid var(--line);font-weight:800;direction:ltr;font-variant-numeric:tabular-nums}
.timer.low{background:var(--bad-50);color:var(--bad);border-color:transparent;animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.65}}
.q-card{padding:20px 18px}
.q-num{color:var(--brand);font-weight:800;font-size:.85rem;margin-bottom:6px}
.q-title{font-size:1.08rem;font-weight:700;line-height:1.75;margin-bottom:16px;word-break:break-word}
.q-img{border-radius:14px;margin:0 auto 16px;max-height:340px;object-fit:contain;background:var(--surface-2)}
.q-mark{margin-inline-start:6px}
.answers{display:grid;gap:10px}
@media (min-width:720px){.answers{grid-template-columns:1fr 1fr}}
.ans{position:relative;display:block}
.ans input{position:absolute;opacity:0;pointer-events:none}
.ans .box{display:flex;align-items:center;gap:12px;min-height:58px;padding:12px 14px;border-radius:16px;border:1.5px solid var(--line);background:var(--surface);cursor:pointer;
  font-weight:600;transition:border-color .15s,background .15s,transform .1s}
.ans .box:active{transform:scale(.985)}
.ans .letter{width:32px;height:32px;border-radius:10px;display:grid;place-items:center;flex:none;background:var(--surface-2);border:1px solid var(--line);font-weight:800;font-size:.85rem;color:var(--ink-3)}
.ans input:checked+.box{border-color:var(--brand);background:var(--brand-50)}
.ans input:checked+.box .letter{background:var(--brand);color:#fff;border-color:var(--brand)}
.ans img{max-height:160px;border-radius:10px}
.ans.right .box{border-color:var(--ok);background:var(--ok-50)}
.ans.right .letter{background:var(--ok);color:#fff;border-color:var(--ok)}
.ans.wrong .box{border-color:var(--bad);background:var(--bad-50)}
.ans.wrong .letter{background:var(--bad);color:#fff;border-color:var(--bad)}
.q-nav{position:fixed;inset-inline:0;bottom:0;z-index:30;padding:12px 16px calc(12px + var(--safe-b));background:var(--surface);border-top:1px solid var(--line);box-shadow:0 -8px 24px -12px rgba(17,22,51,.2)}
.q-nav .in{max-width:860px;margin:0 auto;display:flex;gap:10px}
.dots{display:flex;flex-wrap:wrap;gap:8px}
.dots button{width:40px;height:40px;border-radius:12px;background:var(--surface-2);border:1.5px solid var(--line);font-weight:800;font-size:.85rem;color:var(--ink-3)}
.dots button.done{background:var(--brand-50);border-color:var(--brand-100);color:var(--brand)}
.dots button.cur{border-color:var(--brand);color:var(--ink);box-shadow:0 0 0 3px var(--brand-50)}
.q-section{display:none}.q-section.active{display:block;animation:fade .25s}

/* ---------- Player ---------- */
.player{background:#000;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2);position:relative}
.player-box{position:relative;aspect-ratio:16/9;background:#000;overflow:hidden}
.player-box iframe,.player-box #player{position:absolute;inset:0;width:100%!important;height:100%!important;border:0}
.player-shield{position:absolute;inset-inline:0;top:0;height:62px;background:linear-gradient(#000 55%,transparent);z-index:3;pointer-events:none}
.player,.player *{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
.player-box iframe{pointer-events:none!important}
#playerHost{position:absolute;inset:0}
#playerHost iframe{width:100%;height:100%;border:0}
.player-shield-b{position:absolute;inset-inline:0;bottom:0;height:54px;background:linear-gradient(transparent,rgba(0,0,0,.92) 70%);z-index:3;pointer-events:none}
.wm{position:absolute;z-index:5;pointer-events:none;color:rgba(255,255,255,.28);font-weight:800;font-size:13px;white-space:nowrap;direction:rtl;
  text-shadow:0 1px 2px rgba(0,0,0,.5);transition:top 1.2s ease,left 1.2s ease}
.player-cover{position:absolute;inset:0;z-index:7;background:#0b0e1c;color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;padding:16px}
.player-cover .i{color:#9ea8ff}
.player-tap{position:absolute;inset:0;z-index:4;display:grid;place-items:center;cursor:pointer}
.player-tap .big{width:74px;height:74px;border-radius:50%;background:rgba(79,91,245,.92);color:#fff;display:grid;place-items:center;
  box-shadow:0 10px 30px rgba(0,0,0,.45);transition:opacity .2s,transform .2s}
.player-tap .big .i{width:32px;height:32px;fill:currentColor;stroke:none}
.player.playing .player-tap .big{opacity:0;transform:scale(.8)}
.player.playing.show-ui .player-tap .big{opacity:.9;transform:none}
.player-bar{background:#0d1022;color:#fff;padding:10px 12px 12px}
.seek{direction:ltr;width:100%;margin:0 0 8px;accent-color:var(--brand);height:22px}
.pctrl{display:flex;align-items:center;gap:4px}
.pbtn{height:40px;min-width:40px;padding:0 8px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;gap:4px;color:#dfe3ff;font-weight:700;font-size:.8rem}
.pbtn:hover,.pbtn:active{background:rgba(255,255,255,.1)}
.pbtn .i{width:21px;height:21px}
.pbtn .fill{fill:currentColor;stroke:none}
.ptime{font-size:.8rem;font-weight:700;opacity:.9;direction:ltr;font-variant-numeric:tabular-nums;padding:0 6px;white-space:nowrap}
.pctrl .grow{flex:1}
.speed-menu{position:absolute;bottom:62px;left:12px;background:#1b2040;border-radius:14px;padding:6px;display:none;z-index:6;box-shadow:var(--sh-3)}
.speed-menu.show{display:block}
.speed-menu button{display:block;width:100%;padding:8px 18px;border-radius:9px;color:#fff;font-weight:700;font-size:.85rem;text-align:center;direction:ltr}
.speed-menu button.on{background:var(--brand)}
.player.fs{position:fixed;inset:0;z-index:100;border-radius:0;display:flex;flex-direction:column;justify-content:center}
.player.fs .player-box{aspect-ratio:auto;flex:1}
.player.fs .player-bar{position:absolute;inset-inline:0;bottom:0;background:linear-gradient(transparent,rgba(0,0,0,.85));padding-bottom:calc(12px + var(--safe-b));z-index:5;transition:opacity .25s}
.player.fs.playing:not(.show-ui) .player-bar{opacity:0;pointer-events:none}
.player:fullscreen{border-radius:0}
.parts{display:flex;gap:8px;overflow-x:auto;padding:2px 0 4px;scrollbar-width:none}
.parts::-webkit-scrollbar{display:none}
.part{flex:none;display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:12px;border:1.5px solid var(--line);background:var(--surface);font-weight:700;font-size:.85rem;color:var(--ink-2)}
.part.cur{border-color:var(--brand);background:var(--brand-50);color:var(--brand)}
.part.lock{opacity:.55}
.video-layout{display:grid;gap:18px}
@media (min-width:1100px){.video-layout{grid-template-columns:minmax(0,1fr) 380px;align-items:start}.video-side{position:sticky;top:calc(var(--top-h) + 20px)}}

/* Comments */
.comments{max-height:560px;overflow-y:auto;padding:4px}
.cmt{display:flex;gap:10px;padding:10px 4px}
.cmt+.cmt{border-top:1px solid var(--line)}
.cmt .avatar{width:36px;height:36px}
.cmt .n{font-weight:700;font-size:.86rem}
.cmt .d{color:var(--ink-3);font-size:.74rem;font-weight:600;margin-inline-start:6px}
.cmt .c{font-size:.9rem;color:var(--ink-2);word-break:break-word;white-space:pre-line;margin-top:2px}
.cmt img{border-radius:10px;margin-top:6px}
.composer{display:flex;gap:8px;align-items:flex-end}
.composer .textarea{min-height:48px;height:48px;max-height:140px;border-radius:15px;padding:12px 14px}

/* ---------- Auth ---------- */
.auth{min-height:100dvh;display:grid;grid-template-columns:1fr;background:var(--bg)}
.auth-art{display:none}
.auth-main{display:flex;flex-direction:column;justify-content:flex-start;padding:0 18px calc(24px + var(--safe-b))}
.auth-mobile-hero{padding-top:var(--safe-t)}
.auth-card{width:100%;max-width:440px;margin:0 auto}
.auth-logo{display:flex;align-items:center;gap:12px;margin-bottom:26px}
.auth-logo img{width:52px;height:52px;border-radius:16px;background:var(--brand-50);padding:5px;object-fit:contain}
.auth-logo b{font-size:1.25rem;font-weight:800;display:block;line-height:1.3}
.auth-logo small{color:var(--ink-3);font-weight:600}
.auth h1{font-size:1.55rem;margin-bottom:6px}
.auth .lead-txt{color:var(--ink-3);margin-bottom:24px}
.auth-mobile-hero{height:150px;margin:0 -18px 22px;background:var(--grad);border-radius:0 0 32px 32px;position:relative;overflow:hidden}
.auth-mobile-hero::before{content:"";position:absolute;width:200px;height:200px;border-radius:50%;background:rgba(255,255,255,.12);top:-80px;left:-40px}
.auth-mobile-hero::after{content:"";position:absolute;width:120px;height:120px;border-radius:50%;background:rgba(255,255,255,.1);bottom:-50px;right:30px}
.auth-foot{text-align:center;color:var(--ink-3);font-size:.9rem;margin-top:22px}
.auth-foot a,.link{color:var(--brand);font-weight:800}
@media (min-width:960px){
  .auth{grid-template-columns:1.05fr 1fr}
  .auth-mobile-hero{display:none}
  .auth-art{display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden;background:var(--grad);color:#fff;padding:48px}
  .auth-art::before{content:"";position:absolute;width:520px;height:520px;border-radius:50%;background:rgba(255,255,255,.08);top:-160px;left:-160px}
  .auth-art::after{content:"";position:absolute;width:300px;height:300px;border-radius:50%;background:rgba(255,255,255,.08);bottom:-100px;right:-60px}
  .auth-art>*{position:relative;z-index:1}
  .auth-art h2{font-size:2.3rem;line-height:1.35;max-width:14ch}
  .auth-art p{opacity:.88;font-size:1.05rem;max-width:40ch;margin-top:12px}
  .auth-feats{display:grid;gap:12px;max-width:420px}
  .auth-feats div{display:flex;align-items:center;gap:12px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);padding:12px 16px;border-radius:16px;font-weight:700}
  .auth-main{padding:48px;justify-content:center}
}

/* ---------- Misc ---------- */
.muted{color:var(--ink-3)} .small{font-size:.85rem} .xs{font-size:.76rem} .bold{font-weight:800} .center{text-align:center}
.mt-0{margin-top:0}.mt-1{margin-top:6px}.mt-2{margin-top:12px}.mt-3{margin-top:18px}.mt-4{margin-top:26px}.mb-2{margin-bottom:12px}.mb-3{margin-bottom:18px}
.hidden{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.divider-dash{border-top:1px dashed var(--line);margin:14px 0}
.kv{display:flex;justify-content:space-between;gap:10px;padding:10px 0;font-size:.92rem}
.kv+.kv{border-top:1px dashed var(--line)}
.kv span{color:var(--ink-3);font-weight:600}.kv b{font-weight:800}
.pager{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:18px}
.skeleton{background:linear-gradient(90deg,var(--surface-2),var(--line),var(--surface-2));background-size:200% 100%;animation:sk 1.2s infinite;border-radius:14px}
@keyframes sk{to{background-position:-200% 0}}
.loading-row{display:flex;align-items:center;gap:10px;color:var(--ink-3);font-weight:700;font-size:.88rem;padding:14px}
.wa-float{display:none;position:fixed;left:16px;bottom:calc(var(--nav-h) + var(--safe-b) + 16px);z-index:35;width:54px;height:54px;border-radius:18px;background:#25d366;color:#fff;
  place-items:center;box-shadow:0 10px 24px -8px rgba(37,211,102,.7)}
.wa-float svg{width:28px;height:28px;fill:#fff}
@media (min-width:1024px){.wa-float{display:grid;bottom:24px}}
body.focus .wa-float{display:none}
.footer-note{text-align:center;color:var(--ink-3);font-size:.78rem;padding:26px 16px 0}
.page-loader{position:fixed;top:0;inset-inline:0;height:3px;z-index:120;background:var(--grad);transform:scaleX(0);transform-origin:right;transition:transform .4s}
.page-loader.on{transform:scaleX(.7);transition:transform 8s cubic-bezier(.1,.7,.2,1)}