/* ==========================================================================
   Class Participation Manager — Global Styles
   RTL first, responsive, dark mode ready, modern educational dashboard.
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root{
  --primary:#6366f1;
  --primary-2:#8b5cf6;
  --primary-soft:rgba(99,102,241,.12);
  --primary-contrast:#ffffff;

  --success:#10b981;
  --success-soft:rgba(16,185,129,.12);
  --danger:#ef4444;
  --danger-soft:rgba(239,68,68,.12);
  --warning:#f59e0b;
  --warning-soft:rgba(245,158,11,.14);
  --info:#0ea5e9;
  --info-soft:rgba(14,165,233,.12);

  --bg:#f4f5fb;
  --bg-2:#eef0f8;
  --card:#ffffff;
  --card-2:#f8f9fe;
  --text:#171b33;
  --text-muted:#6b7090;
  --border:#e6e8f3;
  --sidebar-bg:rgba(255,255,255,.82);
  --topbar-bg:rgba(255,255,255,.82);
  --shadow-soft:0 1px 2px rgba(23,27,51,.04),0 8px 24px -8px rgba(23,27,51,.08);
  --shadow-pop:0 10px 40px -8px rgba(23,27,51,.18);
  --radius:18px;
  --radius-sm:12px;
  --radius-lg:24px;
  --font:'Cairo','Tajawal','Segoe UI',Tahoma,Arial,sans-serif;
  --header-h:68px;
  --sidebar-w:248px;
  --ease:cubic-bezier(.4,0,.2,1);
}

/* Dark theme */
html[data-theme="dark"]{
  --primary:#818cf8;
  --primary-2:#a78bfa;
  --primary-soft:rgba(129,140,248,.16);
  --bg:#0e1120;
  --bg-2:#12162a;
  --card:#181c33;
  --card-2:#1e2340;
  --text:#e8eaf6;
  --text-muted:#9aa1c0;
  --border:#262c4d;
  --sidebar-bg:rgba(18,22,42,.85);
  --topbar-bg:rgba(18,22,42,.85);
  --shadow-soft:0 1px 2px rgba(0,0,0,.25),0 8px 24px -8px rgba(0,0,0,.45);
  --shadow-pop:0 10px 40px -8px rgba(0,0,0,.6);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  font-size:15px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
html[data-anim="off"] *,html[data-anim="off"] *::before,html[data-anim="off"] *::after{
  transition:none !important;animation:none !important;
}
a{color:var(--primary);text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
img,video{max-width:100%;display:block}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:20px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:var(--text-muted);background-clip:content-box}
::-webkit-scrollbar-track{background:transparent}
::selection{background:var(--primary);color:#fff}

/* ---------- Loading screen ---------- */
#loader{
  position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  transition:opacity .5s var(--ease),visibility .5s;
}
#loader.hide{opacity:0;visibility:hidden}
.loader-inner{text-align:center;color:#fff;padding:24px}
.loader-logo{width:92px;height:92px;margin:0 auto 22px;border-radius:26px;background:rgba(255,255,255,.18);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;animation:float 3s ease-in-out infinite}
.loader-title{font-size:26px;font-weight:800;letter-spacing:.3px}
.loader-bar{width:230px;height:6px;border-radius:20px;background:rgba(255,255,255,.25);margin:22px auto 14px;overflow:hidden}
.loader-bar-fill{height:100%;width:0;border-radius:20px;background:#fff;animation:load 1.6s ease-in-out infinite}
.loader-hint{font-size:13px;opacity:.85}
@keyframes load{0%{width:0}50%{width:100%}100%{width:100%}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* ---------- App layout ---------- */
.app{display:flex;min-height:100vh}

/* Sidebar */
.sidebar{
  width:var(--sidebar-w);position:fixed;top:0;bottom:0;right:0;z-index:60;
  background:var(--sidebar-bg);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-left:1px solid var(--border);
  display:flex;flex-direction:column;
  transition:transform .35s var(--ease);
}
.sidebar-brand{display:flex;align-items:center;gap:12px;padding:20px 20px 18px;border-bottom:1px solid var(--border)}
.brand-icon{width:46px;height:46px;border-radius:14px;flex-shrink:0;display:flex;align-items:center;justify-content:center;color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-2));box-shadow:0 8px 18px -6px var(--primary)}
.brand-title{font-weight:800;font-size:15px;line-height:1.3}
.brand-sub{font-size:11.5px;color:var(--text-muted)}
.sidebar-nav{flex:1;padding:16px 12px;display:flex;flex-direction:column;gap:4px;overflow-y:auto}
.nav-item{
  display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:14px;
  font-weight:600;font-size:14.5px;color:var(--text-muted);
  transition:background .2s var(--ease),color .2s var(--ease);
  text-align:right;width:100%;
}
.nav-item:hover{background:var(--primary-soft);color:var(--primary)}
.nav-item.active{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 8px 20px -8px var(--primary)}
.nav-icon{display:flex;align-items:center;justify-content:center;flex-shrink:0}
.nav-item.active .nav-icon,.nav-item:hover .nav-icon{transform:scale(1.06)}
.sidebar-footer{padding:12px;border-top:1px solid var(--border)}
.sidebar-credit{text-align:center;font-size:11px;color:var(--text-muted);padding:6px 0 0;opacity:.7}
.sidebar-overlay{position:fixed;inset:0;z-index:55;background:rgba(10,12,25,.5);opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s}
.sidebar-overlay.show{opacity:1;visibility:visible}

/* Main */
.main{flex:1;min-width:0;margin-right:var(--sidebar-w);display:flex;flex-direction:column;min-height:100vh}

/* Topbar */
.topbar{
  position:sticky;top:0;z-index:50;height:var(--header-h);
  display:flex;align-items:center;gap:14px;padding:0 22px;
  background:var(--topbar-bg);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--border);
}
.menu-btn{display:none}
.icon-btn{
  width:42px;height:42px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  color:var(--text-muted);transition:all .2s var(--ease);flex-shrink:0;position:relative;
}
.icon-btn:hover{background:var(--primary-soft);color:var(--primary)}
.icon-btn svg{width:21px;height:21px}
.topbar-search{position:relative;flex:1;max-width:430px}
.topbar-search .search-ico{position:absolute;top:50%;right:14px;transform:translateY(-50%);color:var(--text-muted);display:flex;pointer-events:none}
.topbar-search input{
  width:100%;height:42px;border-radius:14px;border:1.5px solid var(--border);
  background:var(--card);padding:0 42px 0 46px;font-size:14px;outline:none;transition:all .2s var(--ease);
}
.topbar-search input:focus{border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-soft)}
.search-kbd{
  position:absolute;top:50%;left:12px;transform:translateY(-50%);font-size:11px;padding:2px 7px;
  border-radius:7px;border:1px solid var(--border);background:var(--bg-2);color:var(--text-muted);
}
.search-results{
  position:absolute;top:calc(100% + 8px);right:0;left:0;z-index:70;border-radius:16px;
  background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow-pop);
  max-height:380px;overflow:auto;padding:8px;display:none;
}
.search-results.show{display:block;animation:pop .22s var(--ease)}
.search-group-title{font-size:12px;font-weight:700;color:var(--text-muted);padding:10px 12px 6px;letter-spacing:.5px}
.search-item{display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:11px;cursor:pointer;transition:background .15s var(--ease)}
.search-item:hover{background:var(--primary-soft)}
.search-item .si-icon{width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;background:var(--bg-2);color:var(--text-muted);flex-shrink:0}
.search-item .si-title{font-weight:700;font-size:13.5px}
.search-item .si-sub{font-size:11.5px;color:var(--text-muted)}
.search-empty{padding:20px;text-align:center;color:var(--text-muted);font-size:13.5px}
.topbar-actions{display:flex;align-items:center;gap:8px;margin-right:auto}
.topbar-school{text-align:left;padding-right:6px;border-right:1px solid var(--border);margin-left:4px}
.school-name{font-weight:800;font-size:13.5px;line-height:1.3}
.school-teacher{font-size:11px;color:var(--text-muted)}
.avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px;flex-shrink:0;box-shadow:0 6px 14px -6px var(--primary)}

/* ---------- Content ---------- */
.content{padding:28px;max-width:1400px;width:100%;margin:0 auto}
.view-title{font-size:24px;font-weight:800;margin-bottom:4px}
.view-sub{color:var(--text-muted);font-size:14px;margin-bottom:24px}

/* ---------- Cards ---------- */
.card{
  background:var(--card);border-radius:var(--radius);border:1px solid var(--border);
  box-shadow:var(--shadow-soft);padding:22px;
}
.card-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px;flex-wrap:wrap}
.card-title{font-size:16.5px;font-weight:800;display:flex;align-items:center;gap:10px}
.card-title .ct-icon{color:var(--primary)}
.card-body{}

/* Stat cards */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-bottom:26px}
.stat-card{
  position:relative;overflow:hidden;border-radius:var(--radius);padding:20px;cursor:default;
  background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow-soft);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-pop)}
.stat-card::after{content:"";position:absolute;top:-40px;left:-40px;width:120px;height:120px;border-radius:50%;background:var(--stat-soft,rgba(99,102,241,.12));pointer-events:none}
.stat-card .stat-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.stat-ico{width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:var(--stat-soft);color:var(--stat-color);font-size:22px}
.stat-val{font-size:28px;font-weight:900;line-height:1.2}
.stat-label{color:var(--text-muted);font-size:13px;font-weight:600}
.stat-trend{font-size:12px;font-weight:700;padding:3px 10px;border-radius:20px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:13px;font-weight:700;font-size:14px;
  transition:all .2s var(--ease);white-space:nowrap;user-select:none;
}
.btn svg{width:18px;height:18px}
.btn:active{transform:scale(.96)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 8px 20px -8px var(--primary)}
.btn-primary:hover{box-shadow:0 12px 26px -8px var(--primary);filter:brightness(1.05)}
.btn-ghost{background:var(--primary-soft);color:var(--primary)}
.btn-ghost:hover{filter:brightness(.97)}
.btn-outline{border:1.5px solid var(--border);background:var(--card);color:var(--text)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-danger{background:var(--danger-soft);color:var(--danger)}
.btn-danger:hover{filter:brightness(.97)}
.btn-success{background:var(--success);color:#fff;box-shadow:0 8px 20px -8px var(--success)}
.btn-success:hover{filter:brightness(1.06)}
.btn-soft{background:var(--card-2);color:var(--text);border:1px solid var(--border)}
.btn-soft:hover{border-color:var(--primary);color:var(--primary)}
.btn-sm{padding:7px 13px;font-size:12.5px;border-radius:10px}
.btn-sm svg{width:15px;height:15px}
.btn-lg{padding:14px 28px;font-size:16px;border-radius:15px}
.btn-block{width:100%}
.btn-icon{width:38px;height:38px;padding:0;border-radius:11px}
.btn[disabled]{opacity:.5;pointer-events:none}

/* ---------- Forms ---------- */
.field{margin-bottom:16px}
.field label{display:block;font-weight:700;font-size:13.5px;margin-bottom:7px}
.field .req{color:var(--danger)}
.input,.select,.textarea{
  width:100%;border-radius:13px;border:1.5px solid var(--border);background:var(--card);
  padding:11px 15px;font-size:14px;outline:none;transition:all .2s var(--ease);
}
.input:focus,.select:focus,.textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-soft)}
.textarea{resize:vertical;min-height:90px}
.input-hint{font-size:12px;color:var(--text-muted);margin-top:6px}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:0 16px}
.form-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.switch{position:relative;width:48px;height:27px;flex-shrink:0;cursor:pointer}
.switch input{opacity:0;width:0;height:0}
.switch .track{position:absolute;inset:0;border-radius:30px;background:var(--border);transition:background .25s var(--ease)}
.switch .track::after{content:"";position:absolute;top:3px;right:3px;width:21px;height:21px;border-radius:50%;background:#fff;box-shadow:0 2px 6px rgba(0,0,0,.2);transition:transform .25s var(--ease)}
.switch input:checked + .track{background:linear-gradient(135deg,var(--primary),var(--primary-2))}
.switch input:checked + .track::after{transform:translateX(-21px)}
.switch-label{display:flex;align-items:center;gap:12px;justify-content:space-between;cursor:pointer;user-select:none}
.range{width:100%;accent-color:var(--primary);cursor:pointer}
.range-wrap{display:flex;align-items:center;gap:12px}
.range-val{min-width:46px;text-align:center;font-weight:800;background:var(--primary-soft);color:var(--primary);border-radius:10px;padding:3px 8px;font-size:13px}
.color-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.swatch{width:38px;height:38px;border-radius:12px;border:2px solid var(--border);cursor:pointer;transition:all .2s var(--ease);position:relative}
.swatch:hover{transform:scale(1.1)}
.swatch.active{border-color:var(--text);box-shadow:0 0 0 3px var(--primary-soft)}
.swatch.active::after{content:"✓";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:16px;text-shadow:0 1px 3px rgba(0,0,0,.4)}
input[type="color"]{-webkit-appearance:none;appearance:none;width:42px;height:42px;border:none;border-radius:12px;cursor:pointer;background:none;padding:0}
input[type="color"]::-webkit-color-swatch-wrapper{padding:0}
input[type="color"]::-webkit-color-swatch{border-radius:12px;border:2px solid var(--border)}

/* ---------- Tables ---------- */
.table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--border)}
table{width:100%;border-collapse:collapse;min-width:640px;background:var(--card)}
thead th{
  background:var(--card-2);padding:13px 16px;font-size:12.5px;font-weight:800;color:var(--text-muted);
  text-align:right;border-bottom:1px solid var(--border);white-space:nowrap;
}
tbody td{padding:13px 16px;border-bottom:1px solid var(--border);font-size:14px;vertical-align:middle}
tbody tr:last-child td{border-bottom:none}
tbody tr{transition:background .15s var(--ease)}
tbody tr:hover{background:var(--primary-soft)}
.table-actions{display:flex;gap:6px;justify-content:flex-end}
tbody .table-actions{justify-content:flex-start}

/* ---------- Badges & chips ---------- */
.badge{display:inline-flex;align-items:center;gap:5px;padding:3px 11px;border-radius:20px;font-size:12px;font-weight:700;white-space:nowrap}
.badge-success{background:var(--success-soft);color:var(--success)}
.badge-danger{background:var(--danger-soft);color:var(--danger)}
.badge-warning{background:var(--warning-soft);color:var(--warning)}
.badge-info{background:var(--info-soft);color:var(--info)}
.badge-primary{background:var(--primary-soft);color:var(--primary)}
.badge-muted{background:var(--bg-2);color:var(--text-muted)}
.chip{display:inline-flex;align-items:center;gap:7px;background:var(--primary-soft);color:var(--primary);padding:6px 13px;border-radius:20px;font-size:12.5px;font-weight:700}
.chip svg{width:13px;height:13px}
.pill{display:inline-block;padding:2px 10px;border-radius:20px;font-size:12px;font-weight:700}

/* ---------- Progress ---------- */
.progress{height:8px;border-radius:20px;background:var(--bg-2);overflow:hidden}
.progress > div{height:100%;border-radius:20px;background:linear-gradient(90deg,var(--primary),var(--primary-2));transition:width .6s var(--ease)}

/* ---------- Page header ---------- */
.page-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.page-head h1{font-size:24px;font-weight:800}
.page-head .ph-sub{color:var(--text-muted);font-size:14px;margin-top:2px}
.page-actions{display:flex;gap:10px;flex-wrap:wrap}

/* ---------- Classes grid ---------- */
.class-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.class-card{
  position:relative;border-radius:var(--radius);padding:22px;cursor:pointer;overflow:hidden;
  background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow-soft);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.class-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-pop)}
.class-card .cc-top{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.class-avatar{
  width:54px;height:54px;border-radius:16px;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:22px;font-weight:900;box-shadow:0 8px 16px -6px rgba(0,0,0,.3);
}
.class-name{font-size:17px;font-weight:800;margin-bottom:2px}
.class-meta{font-size:12.5px;color:var(--text-muted)}
.class-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.class-stats{display:flex;gap:8px;flex-wrap:wrap;border-top:1px solid var(--border);padding-top:14px}
.class-actions{position:absolute;top:16px;left:16px;display:flex;gap:6px;opacity:0;transition:opacity .2s var(--ease)}
.class-card:hover .class-actions{opacity:1}
.mini-stat{flex:1;min-width:70px;text-align:center;background:var(--card-2);border-radius:12px;padding:8px 6px}
.mini-stat .ms-val{font-weight:900;font-size:17px}
.mini-stat .ms-lbl{font-size:11px;color:var(--text-muted)}

/* ---------- Tabs ---------- */
.tabs{display:flex;gap:6px;background:var(--card-2);padding:5px;border-radius:14px;overflow-x:auto;border:1px solid var(--border)}
.tab{padding:9px 18px;border-radius:10px;font-weight:700;font-size:13.5px;color:var(--text-muted);white-space:nowrap;transition:all .2s var(--ease);display:flex;align-items:center;gap:7px}
.tab:hover{color:var(--primary)}
.tab.active{background:var(--card);color:var(--primary);box-shadow:var(--shadow-soft)}
.tab .tab-count{background:var(--primary-soft);color:var(--primary);border-radius:20px;padding:0 8px;font-size:11.5px}

/* ---------- Student list ---------- */
.student-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px}
.student-card{
  display:flex;align-items:center;gap:12px;padding:14px;border-radius:16px;cursor:pointer;
  background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow-soft);
  transition:all .25s var(--ease);
}
.student-card:hover{transform:translateY(-3px);border-color:var(--primary);box-shadow:var(--shadow-pop)}
.student-avatar{
  width:42px;height:42px;border-radius:13px;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:16px;color:var(--primary);background:var(--primary-soft);
}
.student-card .sc-name{font-weight:800;font-size:14px;line-height:1.4}
.student-card .sc-num{font-size:11.5px;color:var(--text-muted)}
.toolbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.toolbar .search-box{position:relative;flex:1;min-width:200px}
.toolbar .search-box input{width:100%;padding:10px 38px 10px 14px;border-radius:12px;border:1.5px solid var(--border);background:var(--card);font-size:13.5px;outline:none;transition:border .2s}
.toolbar .search-box input:focus{border-color:var(--primary)}
.toolbar .search-box .sb-ico{position:absolute;top:50%;right:12px;transform:translateY(-50%);color:var(--text-muted);display:flex}

/* ---------- Lesson cards ---------- */
.lesson-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.lesson-card{
  border-radius:var(--radius);padding:20px;cursor:pointer;position:relative;overflow:hidden;
  background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow-soft);
  transition:all .25s var(--ease);
}
.lesson-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-pop);border-color:var(--primary)}
.lesson-card .lc-date{font-size:12px;color:var(--text-muted);display:flex;align-items:center;gap:6px;margin-bottom:8px}
.lesson-card .lc-name{font-size:16px;font-weight:800;margin-bottom:10px}
.lesson-card .lc-meta{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--border);padding-top:12px}
.lesson-card .lesson-actions{position:absolute;top:12px;left:12px;display:flex;gap:6px;opacity:0;transition:opacity .2s}
.lesson-card:hover .lesson-actions{opacity:1}

/* ---------- Question cards ---------- */
.question-card{
  border-radius:var(--radius);background:var(--card);border:1px solid var(--border);
  box-shadow:var(--shadow-soft);padding:20px;margin-bottom:16px;transition:all .25s var(--ease);position:relative;
}
.question-card.dragging{opacity:.55;transform:scale(.99);box-shadow:var(--shadow-pop)}
.question-card.drag-over{border-color:var(--primary);border-style:dashed}
.qc-top{display:flex;align-items:flex-start;gap:12px;margin-bottom:14px}
.drag-handle{cursor:grab;color:var(--text-muted);opacity:.6;display:flex;padding:4px;border-radius:8px;flex-shrink:0}
.drag-handle:hover{opacity:1;color:var(--primary);background:var(--primary-soft)}
.drag-handle:active{cursor:grabbing}
.qc-num{font-size:12px;font-weight:800;color:var(--primary);background:var(--primary-soft);padding:2px 10px;border-radius:20px;flex-shrink:0}
.qc-text{font-weight:700;font-size:15.5px;flex:1}
.qc-badges{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.qc-media{margin-bottom:14px;border-radius:12px;overflow:hidden;border:1px solid var(--border);max-height:320px}
.qc-media img,.qc-media video{width:100%;max-height:320px;object-fit:cover}
.qc-answers{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}
@media(max-width:640px){.qc-answers{grid-template-columns:1fr}}
.answer-chip{
  display:flex;align-items:center;gap:10px;padding:11px 14px;border-radius:12px;border:1.5px solid var(--border);
  background:var(--card-2);font-weight:700;font-size:14px;
}
.answer-chip .ac-letter{width:30px;height:30px;border-radius:9px;background:var(--card);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:13px;flex-shrink:0}
.answer-chip.correct{border-color:var(--success);background:var(--success-soft)}
.answer-chip.correct .ac-letter{background:var(--success);color:#fff;border-color:var(--success)}
.qc-footer{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;border-top:1px solid var(--border);padding-top:14px}
.qc-info{display:flex;gap:14px;color:var(--text-muted);font-size:12.5px;align-items:center}
.qc-info span{display:flex;align-items:center;gap:5px}

/* ---------- Media upload ---------- */
.media-upload{
  border:2px dashed var(--border);border-radius:13px;padding:18px;text-align:center;cursor:pointer;
  transition:all .2s var(--ease);background:var(--card-2);position:relative;overflow:hidden;
}
.media-upload:hover{border-color:var(--primary);background:var(--primary-soft)}
.media-upload .mu-icon{font-size:26px;margin-bottom:6px}
.media-upload .mu-text{font-size:13px;color:var(--text-muted);font-weight:600}
.media-upload.has-media{border-style:solid;border-color:var(--success)}
.media-preview{max-height:180px;border-radius:10px;margin-top:12px;overflow:hidden}
.media-preview img,.media-preview video{width:100%;max-height:180px;object-fit:contain;background:#000}
.media-upload input[type="file"]{display:none}

/* ---------- Modal ---------- */
.modal-root{position:fixed;inset:0;z-index:100;pointer-events:none}
.modal-root.show{pointer-events:auto}
.modal-backdrop{position:absolute;inset:0;background:rgba(10,12,25,.55);backdrop-filter:blur(4px);opacity:0;transition:opacity .25s var(--ease)}
.modal-root.show .modal-backdrop{opacity:1}
.modal{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-46%);width:min(560px,calc(100vw - 32px));
  background:var(--card);border-radius:var(--radius-lg);box-shadow:var(--shadow-pop);
  opacity:0;transition:all .28s var(--ease);max-height:88vh;display:flex;flex-direction:column;
  border:1px solid var(--border);
}
.modal-root.show .modal{opacity:1;transform:translate(-50%,-50%)}
.modal-lg{width:min(780px,calc(100vw - 32px))}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px 0;gap:12px}
.modal-title{font-size:18px;font-weight:800;display:flex;align-items:center;gap:10px}
.modal-body{padding:22px 24px;overflow-y:auto;flex:1}
.modal-footer{display:flex;justify-content:flex-end;gap:10px;padding:16px 24px 20px;border-top:1px solid var(--border)}
.modal-close{width:36px;height:36px;border-radius:11px;display:flex;align-items:center;justify-content:center;color:var(--text-muted);transition:all .2s}
.modal-close:hover{background:var(--danger-soft);color:var(--danger)}

/* Confirm dialog */
.confirm-icon{width:64px;height:64px;border-radius:20px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;font-size:30px}
.confirm-text{text-align:center;font-size:14.5px;color:var(--text-muted);margin-bottom:4px}
.confirm-title{text-align:center;font-size:19px;font-weight:800;margin-bottom:8px}

/* ---------- Toasts ---------- */
.toast-wrap{position:fixed;bottom:22px;right:50%;transform:translateX(50%);z-index:300;display:flex;flex-direction:column;gap:10px;align-items:center;pointer-events:none}
.toast{
  display:flex;align-items:center;gap:11px;padding:13px 18px;border-radius:14px;min-width:280px;max-width:min(480px,calc(100vw - 40px));
  background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow-pop);
  font-weight:700;font-size:13.5px;pointer-events:auto;animation:toast-in .35s var(--ease);
}
.toast.leaving{animation:toast-out .3s var(--ease) forwards}
.toast .toast-ico{width:30px;height:30px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.toast .toast-msg{flex:1}
.toast .toast-action{font-weight:800;color:var(--primary);padding:4px 10px;border-radius:9px;flex-shrink:0}
.toast .toast-action:hover{background:var(--primary-soft)}
.toast-success .toast-ico{background:var(--success-soft);color:var(--success)}
.toast-error .toast-ico{background:var(--danger-soft);color:var(--danger)}
.toast-info .toast-ico{background:var(--info-soft);color:var(--info)}
.toast-warning .toast-ico{background:var(--warning-soft);color:var(--warning)}
@keyframes toast-in{from{opacity:0;transform:translateY(16px) scale(.96)}to{opacity:1;transform:none}}
@keyframes toast-out{to{opacity:0;transform:translateY(12px) scale(.95)}}

/* ---------- Empty state ---------- */
.empty-state{text-align:center;padding:50px 20px}
.empty-illustration{width:110px;height:110px;margin:0 auto 20px;border-radius:50%;background:var(--primary-soft);display:flex;align-items:center;justify-content:center;font-size:46px;animation:float 4s ease-in-out infinite}
.empty-title{font-size:17px;font-weight:800;margin-bottom:6px}
.empty-sub{color:var(--text-muted);font-size:13.5px;margin-bottom:18px;max-width:380px;margin-inline:auto}

/* ---------- Charts ---------- */
.chart-box{width:100%;height:auto}
.chart-box svg{width:100%;height:auto;display:block}
.chart-legend{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:10px}
.legend-item{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--text-muted);font-weight:600}
.legend-dot{width:11px;height:11px;border-radius:4px}
.chart-hint{text-align:center;font-size:12px;color:var(--text-muted);margin-top:8px}

/* ---------- Ranking ---------- */
.rank-item{display:flex;align-items:center;gap:13px;padding:11px 0;border-bottom:1px solid var(--border)}
.rank-item:last-child{border-bottom:none}
.rank-pos{width:30px;height:30px;border-radius:9px;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:13px;background:var(--bg-2);color:var(--text-muted);flex-shrink:0}
.rank-item:nth-child(1) .rank-pos{background:linear-gradient(135deg,#f59e0b,#fbbf24);color:#fff}
.rank-item:nth-child(2) .rank-pos{background:linear-gradient(135deg,#94a3b8,#cbd5e1);color:#fff}
.rank-item:nth-child(3) .rank-pos{background:linear-gradient(135deg,#b45309,#d97706);color:#fff}
.rank-name{flex:1;font-weight:700;font-size:14px}
.rank-bar{flex:1;max-width:180px}
.rank-val{font-weight:800;font-size:13px;color:var(--text-muted);min-width:38px;text-align:left}

/* ---------- Presentation ---------- */
.presentation-wrap{min-height:calc(100vh - var(--header-h));display:flex;align-items:center;justify-content:center;padding:20px}
.pres-card{width:100%;max-width:820px;border-radius:28px;padding:40px;background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow-pop);animation:pop .4s var(--ease)}
.pres-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:26px;flex-wrap:wrap}
.pres-title{font-size:17px;font-weight:800}
.pres-sub{font-size:12.5px;color:var(--text-muted)}
.pres-progress{flex:1;max-width:260px}
.pres-counter{font-size:13px;font-weight:800;color:var(--primary);background:var(--primary-soft);padding:6px 14px;border-radius:20px;white-space:nowrap}
.pres-qnum{display:inline-flex;align-items:center;gap:8px;background:var(--card-2);border:1px solid var(--border);padding:6px 16px;border-radius:20px;font-size:13px;font-weight:800;color:var(--text-muted);margin-bottom:22px}
.pres-question{font-size:clamp(22px,4vw,34px);font-weight:800;text-align:center;margin-bottom:20px;line-height:1.5}
.pres-media{border-radius:16px;overflow:hidden;border:1px solid var(--border);margin-bottom:22px;max-height:340px;background:#000}
.pres-media img,.pres-media video{width:100%;max-height:340px;object-fit:contain;margin:auto}
.pres-answers{display:grid;gap:14px;margin-bottom:26px}
.pres-answers.two{grid-template-columns:1fr 1fr}
.pres-answers.four{grid-template-columns:1fr 1fr}
@media(max-width:560px){.pres-answers.two,.pres-answers.four{grid-template-columns:1fr}}
.pres-answer{
  padding:20px;border-radius:18px;border:2px solid var(--border);background:var(--card-2);
  font-size:clamp(17px,2.6vw,22px);font-weight:800;text-align:center;transition:all .2s var(--ease);position:relative;
}
.pres-answer:hover{border-color:var(--primary);transform:translateY(-2px)}
.pres-answer .pa-letter{display:inline-flex;width:34px;height:34px;border-radius:10px;background:var(--primary-soft);color:var(--primary);align-items:center;justify-content:center;font-size:15px;margin-left:10px;vertical-align:middle}
.pres-answer.correct-answer{border-color:var(--success);background:var(--success-soft);color:var(--success)}
.pres-answer.wrong-answer{border-color:var(--danger);background:var(--danger-soft);color:var(--danger)}
.pres-answer.revealed{border-color:var(--success);background:var(--success-soft)}
.pres-answer[disabled]{cursor:default}
.pres-selected{
  display:flex;align-items:center;gap:14px;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;
  padding:16px 20px;border-radius:18px;margin-bottom:22px;box-shadow:0 12px 28px -10px var(--primary);animation:pop .4s var(--ease);
}
.pres-selected .ps-avatar{width:52px;height:52px;border-radius:50%;background:rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:22px;flex-shrink:0}
.pres-selected .ps-name{font-size:20px;font-weight:800}
.pres-selected .ps-role{font-size:12.5px;opacity:.85}
.pres-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.pres-btn{flex:1;min-width:150px;padding:15px 22px;border-radius:16px;font-weight:800;font-size:15.5px;display:flex;align-items:center;justify-content:center;gap:9px;transition:all .2s var(--ease)}
.pres-btn:active{transform:scale(.97)}
.pres-btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 10px 24px -8px var(--primary)}
.pres-btn-success{background:linear-gradient(135deg,#10b981,#059669);color:#fff;box-shadow:0 10px 24px -8px var(--success)}
.pres-btn-danger{background:linear-gradient(135deg,#ef4444,#dc2626);color:#fff;box-shadow:0 10px 24px -8px var(--danger)}
.pres-btn-outline{border:2px solid var(--border);color:var(--text);background:var(--card)}
.pres-btn-ghost{background:var(--card-2);color:var(--text);border:1.5px solid var(--border)}
.pres-btn[disabled]{opacity:.45;pointer-events:none;box-shadow:none}
.pres-verdict{text-align:center;padding:14px;border-radius:16px;font-weight:800;font-size:18px;margin-bottom:20px;animation:pop .35s var(--ease)}
.pres-verdict.correct{background:var(--success-soft);color:var(--success)}
.pres-verdict.wrong{background:var(--danger-soft);color:var(--danger)}
.pres-nav{display:flex;align-items:center;justify-content:space-between;margin-top:22px;gap:10px}
.pres-quit{color:var(--text-muted);font-weight:700;font-size:13.5px;display:flex;align-items:center;gap:6px;padding:8px 14px;border-radius:11px;transition:all .2s}
.pres-quit:hover{color:var(--danger);background:var(--danger-soft)}

/* Start-lesson launcher */
.launch-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:760px){.launch-grid{grid-template-columns:1fr}}
.launch-card{border:2px solid var(--border);border-radius:var(--radius);padding:22px;transition:all .2s var(--ease);background:var(--card)}
.launch-card:focus-within,.launch-card:hover{border-color:var(--primary)}
.launch-label{font-size:13px;font-weight:800;color:var(--text-muted);margin-bottom:9px;display:block}
.launch-banner{
  border-radius:var(--radius-lg);padding:40px;margin-top:22px;text-align:center;position:relative;overflow:hidden;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;
  box-shadow:0 18px 44px -14px var(--primary);animation:pop .4s var(--ease);
}
.launch-banner h2{font-size:26px;font-weight:900;margin-bottom:6px}
.launch-banner p{opacity:.9;font-size:14.5px;margin-bottom:22px}
.launch-banner::before,.launch-banner::after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.14)}
.launch-banner::before{width:200px;height:200px;top:-80px;right:-60px}
.launch-banner::after{width:150px;height:150px;bottom:-60px;left:-40px}

/* ---------- Wheel ---------- */
.wheel-modal .modal{width:min(520px,calc(100vw - 24px));text-align:center}
.wheel-wrap{position:relative;width:min(400px,82vw);margin:6px auto 0;aspect-ratio:1}
.wheel-svg{width:100%;height:100%;overflow:visible}
.wheel-pointer{position:absolute;top:-9px;left:50%;transform:translateX(-50%) rotate(180deg);z-index:5;color:var(--danger);filter:drop-shadow(0 2px 4px rgba(0,0,0,.3))}
.wheel-center{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:4;pointer-events:none}
.wheel-hub{
  width:76px;height:76px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--card);box-shadow:0 6px 18px rgba(0,0,0,.25);font-weight:900;font-size:26px;color:var(--primary);
}
.wheel-count{font-size:13px;color:var(--text-muted);margin:14px 0 4px}
.wheel-actions{display:flex;gap:12px;justify-content:center;margin-top:6px}
.wheel-empty{text-align:center;padding:30px;color:var(--text-muted)}
.spin-btn{min-width:170px}

/* ---------- Confetti ---------- */
#confetti-canvas{position:fixed;inset:0;z-index:400;pointer-events:none}

/* ---------- Settings ---------- */
.settings-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:18px}
.settings-section .card-title{font-size:15.5px}
.divider{height:1px;background:var(--border);margin:20px 0}

/* ---------- Backup ---------- */
.backup-hero{
  border-radius:var(--radius-lg);padding:34px;text-align:center;margin-bottom:22px;position:relative;overflow:hidden;
  background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow-soft);
}
.backup-hero .bh-icon{width:70px;height:70px;border-radius:22px;margin:0 auto 16px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:32px}
.backup-hero h2{font-size:21px;font-weight:800;margin-bottom:6px}
.backup-hero p{color:var(--text-muted);font-size:14px;margin-bottom:20px}
.backup-meta{display:inline-flex;align-items:center;gap:8px;background:var(--bg-2);padding:8px 16px;border-radius:20px;font-size:13px;font-weight:700;color:var(--text-muted);margin-bottom:20px}

/* ---------- Report ---------- */
.report-paper{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;
  box-shadow:var(--shadow-soft);
}
.report-header{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;border-bottom:1.5px solid var(--border);padding-bottom:18px;margin-bottom:20px}
.report-header .rh-school{font-size:20px;font-weight:900}
.report-header .rh-meta{color:var(--text-muted);font-size:12.5px;text-align:left}
.report-section-title{font-size:15px;font-weight:800;margin:24px 0 12px;display:flex;align-items:center;gap:9px}
.report-section-title::after{content:"";flex:1;height:1px;background:var(--border)}
.report-summary-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin-bottom:8px}
.report-stat{background:var(--card-2);border:1px solid var(--border);border-radius:14px;padding:14px;text-align:center}
.report-stat .rs-val{font-size:22px;font-weight:900;color:var(--primary)}
.report-stat .rs-lbl{font-size:12px;color:var(--text-muted);font-weight:600}

/* ---------- Animations ---------- */
@keyframes pop{from{opacity:0;transform:translateY(10px) scale(.97)}to{opacity:1;transform:none}}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}
.view-enter{animation:fadeUp .35s var(--ease)}
.view-enter-children > *{animation:fadeUp .4s var(--ease) backwards}
.view-enter-children > *:nth-child(1){animation-delay:.02s}
.view-enter-children > *:nth-child(2){animation-delay:.06s}
.view-enter-children > *:nth-child(3){animation-delay:.1s}
.view-enter-children > *:nth-child(4){animation-delay:.14s}
.view-enter-children > *:nth-child(5){animation-delay:.18s}
.view-enter-children > *:nth-child(6){animation-delay:.22s}
.shake{animation:shake .4s var(--ease)}

/* ---------- Utility ---------- */
.mt-1{margin-top:6px}.mt-2{margin-top:12px}.mt-3{margin-top:18px}.mt-4{margin-top:26px}
.mb-1{margin-bottom:6px}.mb-2{margin-bottom:12px}.mb-3{margin-bottom:18px}.mb-4{margin-bottom:26px}
.flex{display:flex;align-items:center;gap:10px}
.flex-between{display:flex;align-items:center;justify-content:space-between;gap:10px}
.wrap{flex-wrap:wrap}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
@media(max-width:640px){.grid-2{grid-template-columns:1fr}}
.muted{color:var(--text-muted)}
.small{font-size:12.5px}
.bold{font-weight:800}
.text-center{text-align:center}
.hidden{display:none!important}

/* ---------- Responsive ---------- */
@media(max-width:1100px){
  .content{padding:22px}
}
@media(max-width:900px){
  .menu-btn{display:flex}
  .sidebar{transform:translateX(100%)}
  .sidebar.open{transform:translateX(0);box-shadow:var(--shadow-pop)}
  .main{margin-right:0}
  .topbar-school{display:none}
}
@media(max-width:640px){
  :root{--header-h:60px}
  .content{padding:16px}
  .view-title{font-size:20px}
  .page-head h1{font-size:20px}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .stat-val{font-size:22px}
  .topbar{padding:0 12px;gap:8px}
  .search-kbd{display:none}
  .topbar-search input{padding-right:38px}
  .pres-card{padding:22px;border-radius:20px}
  .class-grid{grid-template-columns:1fr}
  .pres-answer{padding:15px}
  .modal-footer{flex-wrap:wrap}
  .toast{min-width:calc(100vw - 32px)}
}
@media(max-width:420px){
  .stat-grid{grid-template-columns:1fr 1fr}
}

/* ---------- Print ---------- */
@media print{
  .sidebar,.topbar,.toast-wrap,.modal-root,.page-actions,.no-print,#confetti-canvas,#loader{display:none!important}
  .app{display:block}
  .main{margin:0}
  .content{padding:0;max-width:none}
  body{background:#fff;color:#000;font-size:12px}
  .card,.report-paper,.report-stat{box-shadow:none;border:1px solid #ddd;background:#fff;border-radius:8px}
  table{min-width:0;border:1px solid #ddd}
  thead th{background:#f5f5f5!important;color:#000!important}
  tbody td{border-color:#ddd}
  a{color:#000}
  .print-hidden{display:none!important}
}