:root{
  --theme-gradient: linear-gradient(135deg,#ef4444 0%,#3b82f6 25%,#22c55e 50%,#facc15 75%,#38bdf8 100%);
  --card: rgba(255,255,255,.88);
  --border: rgba(255,255,255,.55);
  --text: #0f172a;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:Arial,Helvetica,sans-serif;
  color:var(--text);
  background:var(--theme-gradient);
  min-height:100vh;
}
button,input,select,textarea{font:inherit}
.hidden{display:none!important}
#app{max-width:1700px;margin:0 auto;padding:20px}
.topbar,.footer-bar,.stat-card,.student-card,.modal-card,.flash{
  backdrop-filter: blur(12px);
  background:var(--card);
  border:1px solid var(--border);
  box-shadow:0 20px 50px rgba(15,23,42,.12);
}
.topbar{
  border-radius:28px;padding:20px;display:flex;justify-content:space-between;gap:20px;align-items:flex-start;flex-wrap:wrap
}
.brand-group{display:flex;gap:18px;align-items:center;flex-wrap:wrap;flex:1}
.logo-box img,.logo-fallback{width:84px;height:84px;border-radius:24px;object-fit:cover;border:4px solid #fff;display:flex;align-items:center;justify-content:center;background:#fff;font-weight:800}
.title-group h1{margin:0;font-size:44px}
.title-group p,.teacher-box div{margin-top:6px;font-weight:700;color:#334155}
.teacher-box{margin-left:18px}
.active-badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.active-badges span,.quiz-badges span,.note-badge{
  background:;border:1px solid #e2e8f0;padding:10px 14px;border-radius:999px;font-weight:700
}
.header-actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.primary-btn,.outline-btn{
  border:none;border-radius:18px;padding:14px 18px;font-weight:800;cursor:pointer
}
.primary-btn{background:#2563eb;color:#fff}
.outline-btn{background:#fff;color:#0f172a;border:0px solid #cbd5e1}
.creator-card{
  border:none;cursor:pointer;background:#fff;padding:8px 12px;border-radius:18px;display:flex;align-items:center;gap:12px;box-shadow:0 10px 30px rgba(15,23,42,.08)
}
.creator-card img,.creator-fallback{width:52px;height:52px;border-radius:50%;object-fit:cover;background:#cbd5e1;display:flex;align-items:center;justify-content:center;font-weight:800}
.creator-card small{display:block;color:#64748b;margin-top:4px}
.flash{display:none;margin-top:18px;padding:16px 18px;border-radius:18px;font-weight:700}
.flash.show{display:block}
.stats-wrap{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:20px}
.stat-card{border-radius:26px;padding:18px 20px;display:flex;gap:14px;align-items:center}
.stat-icon{width:60px;height:60px;border-radius:18px;background:#fff;display:flex;align-items:center;justify-content:center;font-size:30px}
.stat-card small{display:block;color:#475569}
.stat-card strong{display:block;font-size:38px;margin-top:6px}
.students-section{margin-top:26px}
.section-head{display:flex;justify-content:space-between;gap:14px;align-items:center;flex-wrap:wrap;margin-bottom:14px;color:#fff}
.section-head h2{font-size:34px;margin:0}
.section-head p{margin:6px 0 0}
.students-grid{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));gap:16px}
.student-card{
  border:none;border-radius:28px;padding:14px;cursor:pointer;transition:transform .2s ease;
}
.student-card:hover{transform:translateY(-6px)}
.student-media{position:relative;aspect-ratio:4/4.8;max-width:180px;margin:0 auto}
.student-image,.student-placeholder,.status-overlay{
  width:100%;
  height:100%;
  border-radius:44%;
  border:8px solid #fff;
  object-fit:cover;
  display:flex;

  justify-content:center;
  font-weight:900;
  box-shadow:0 10px 24px rgba(15,23,42,.16)
}
.student-placeholder{background:linear-gradient(135deg,#f43f5e,#60a5fa);color:#fff;font-size:40px}
.student-card:nth-child(3n+2) .student-placeholder{background:linear-gradient(135deg,#22c55e,#facc15)}
.student-card:nth-child(3n) .student-placeholder{background:linear-gradient(135deg,#8b5cf6,#14b8a6)}
.status-overlay{
  position:absolute;inset:0;background:transparent;border:none;box-shadow:none;font-size:86px
}
.status-overlay.cap{top:-30px;left:50%;transform:translateX(-50%);height:auto;width:auto;font-size:78px}
.status-overlay.sad{background:linear-gradient(135deg,#fde68a,#fb923c,#f87171);color:#111827}
.student-name{font-weight:800;font-size:14px;text-align:center;margin-top:10px}
.student-state{font-size:13px;color:#64748b;text-align:center;margin-top:4px}
.footer-bar{
  margin-top:26px;border-radius:22px;padding:16px 20px;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap
}
.screen-lock{
  position:fixed;inset:0;background:rgba(15,23,42,.45);z-index:2000;display:flex;align-items:center;justify-content:center;padding:20px
}
.lock-card{
  width:min(420px,100%);background:#fff;border-radius:30px;padding:34px;box-shadow:0 30px 60px rgba(0,0,0,.2);text-align:center
}
.lock-icon{font-size:52px}
.lock-card input,.modal-card input,.modal-card select,.modal-card textarea{
  width:100%;padding:13px 14px;border:1px solid #cbd5e1;border-radius:16px;margin-top:10px
}
.lock-card button{width:100%;margin-top:12px}
.error{color:#dc2626;font-weight:700;margin-top:10px}
.modal{
  position:fixed;inset:0;background:rgba(15,23,42,.55);z-index:2100;display:flex;align-items:center;justify-content:center;padding:20px
}
.modal-card{
  width:min(1100px,100%);max-height:92vh;overflow:auto;border-radius:30px;padding:24px;background:#fff;position:relative
}
.image-modal{width:min(560px,100%);padding:0;overflow:hidden}
.image-modal img,.creator-big-fallback{width:100%;aspect-ratio:0/1;object-fit:cover;background:#cbd5e1;display:flex;align-items:center;justify-content:center;font-size:48px;font-weight:900}
.creator-caption{padding:20px;background:#0f172a;color:#fff}
.close-btn{
  position:absolute;top:10px;right:10px;width:40px;height:40px;border-radius:50%;border:none;background:#fff;cursor:pointer;font-size:24px;z-index:2
}
.quiz-card{width:min(780px,100%)}
.quiz-top{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap}
.quiz-top #quizStudentName{font-size:24px;font-weight:800}
.quiz-badges{display:flex;gap:10px;flex-wrap:wrap}
.question-box{
  margin-top:18px;background:#f8fafc;border:1px solid #e2e8f0;padding:18px;border-radius:22px;font-size:28px;font-weight:800
}
.answers-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px}
.answer-btn{
  background:#fff;border:1px solid #cbd5e1;border-radius:20px;padding:16px;text-align:left;font-weight:800;cursor:pointer
}
.quiz-note{color:#64748b}
.admin-card{width:min(1240px,100%)}
.admin-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.admin-tabs{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}
.tab-btn{padding:12px 16px;border:none;border-radius:16px;background:#e2e8f0;cursor:pointer;font-weight:800}
.tab-btn.active{background:#2563eb;color:#fff}
.tab-panel{display:none}
.tab-panel.active{display:block}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.form-grid .full{grid-column:1/-1}
.student-admin-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.student-admin-card,.question-item{border:1px solid #e2e8f0;border-radius:24px;padding:14px;background:#f8fafc}
.question-toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.question-item{margin-bottom:14px}
.question-item .row2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.question-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
@media (max-width: 1400px){.students-grid{grid-template-columns:repeat(6,minmax(0,1fr))}}
@media (max-width: 1100px){.students-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.student-admin-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width: 768px){
  #app{padding:14px}
  .title-group h1{font-size:32px}
  .students-grid,.answers-grid,.stats-wrap,.form-grid,.student-admin-grid,.question-item .row2{grid-template-columns:1fr}
  .teacher-box{margin-left:0}
}

/* Javob variantlari */
.quiz-option{
    transition: all .25s ease;
    cursor:pointer;
    border:2px solid #e5e7eb;
}

/* Kursor olib borganda */
.quiz-option:hover{
    background:linear-gradient(135deg,#3b82f6,#22c55e);
    color:white;
    transform:scale(1.05);
    box-shadow:0 8px 20px rgba(0,0,0,0.2);
}

/* To‘g‘ri javob */
.correct-answer{
    background:#22c55e !important;
    color:white !important;
    border-color:#16a34a;
    animation:correctFlash .4s ease;
}

/* Noto‘g‘ri javob */
.wrong-answer{
    background:#ef4444 !important;
    color:white !important;
    border-color:#dc2626;
    animation:wrongFlash .4s ease;
}

@keyframes correctFlash{
    0%{transform:scale(1)}
    50%{transform:scale(1.08)}
    100%{transform:scale(1)}
}

@keyframes wrongFlash{
    0%{transform:translateX(0)}
    25%{transform:translateX(-4px)}
    50%{transform:translateX(4px)}
    75%{transform:translateX(-4px)}
    100%{transform:translateX(0)}
}

.answer-btn{
    transition: all 0.25s ease;
    cursor: pointer;
    border: 2px solid #d9dee8;
    background: #ffffff;
}

.answer-btn:hover{
    background: linear-gradient(135deg, #3b82f6, #22c55e);
    color: #ffffff;
    transform: scale(1.04);
    box-shadow: 0 8px 18px rgba(0,0,0,0.18);
    border-color: transparent;
}

.correct-answer{
    background: #22c55e !important;
    color: #ffffff !important;
    border-color: #16a34a !important;
    transform: scale(1.04);
    box-shadow: 0 8px 18px rgba(34,197,94,0.35);
    animation: correctFlash .4s ease;
}

.wrong-answer{
    background: #ef4444 !important;
    color: #ffffff !important;
    border-color: #dc2626 !important;
    box-shadow: 0 8px 18px rgba(239,68,68,0.35);
    animation: wrongFlash .35s ease;
}

@keyframes correctFlash{
    0%{transform:scale(1)}
    50%{transform:scale(1.08)}
    100%{transform:scale(1.04)}
}

@keyframes wrongFlash{
    0%{transform:translateX(0)}
    25%{transform:translateX(-4px)}
    50%{transform:translateX(4px)}
    75%{transform:translateX(-4px)}
    100%{transform:translateX(0)}
}
.footer-bar{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:14px 20px;
}

.footer-left{
    font-weight:600;
}

.footer-right{
    display:flex;
    align-items:center;
    gap:20px;
}

.footer-phone{
    display:flex;
    align-items:center;
    gap:6px;
    font-weight:300;
}

.footer-phone a{
    text-decoration:none;
    color:#111;
}

.footer-phone a:hover{
    color:#2563eb;
}

.phone-icon{
    font-size:18px;
}
.stats-modal-card{
    width:min(1100px, 96vw);
    max-height:90vh;
    overflow:auto;
    border-radius:28px;
    background:linear-gradient(180deg,#ffffff,#f8fbff);
    padding:24px;
    box-shadow:0 30px 80px rgba(0,0,0,.18);
}

.stats-header{
    display:flex;
    justify-content:space-between;
    gap:20px;
    align-items:flex-start;
    flex-wrap:wrap;
    margin-bottom:20px;
}

.stats-header h2{
    margin:0;
    font-size:32px;
    font-weight:900;
    color:#0f172a;
}

.stats-header p{
    margin:6px 0 0;
    color:#64748b;
    font-size:15px;
}

.stats-filters{
    display:flex;
    gap:12px;
    flex-wrap:wrap;
}

.stats-filters select{
    height:46px;
    border-radius:14px;
    border:1px solid #dbe3ef;
    padding:0 14px;
    background:#fff;
    font-weight:700;
}

.stats-summary{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:14px;
    margin-bottom:22px;
}

.stats-mini-card{
    border-radius:20px;
    padding:16px 18px;
    color:#fff;
    box-shadow:0 12px 28px rgba(0,0,0,.12);
}

.stats-mini-card span{
    display:block;
    font-size:13px;
    opacity:.95;
}

.stats-mini-card strong{
    display:block;
    margin-top:8px;
    font-size:30px;
    font-weight:900;
}

.stats-mini-card.blue{ background:linear-gradient(135deg,#2563eb,#38bdf8); }
.stats-mini-card.green{ background:linear-gradient(135deg,#16a34a,#4ade80); }
.stats-mini-card.orange{ background:linear-gradient(135deg,#f59e0b,#fb7185); }
.stats-mini-card.purple{ background:linear-gradient(135deg,#7c3aed,#60a5fa); }

.stats-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:18px;
}

.stats-student-card{
    position:relative;
    background:#fff;
    border:1px solid #e6edf7;
    border-radius:24px;
    padding:18px;
    box-shadow:0 12px 30px rgba(15,23,42,.08);
    transition:.25s ease;
}

.stats-student-card:hover{
    transform:translateY(-4px);
    box-shadow:0 18px 36px rgba(15,23,42,.13);
}

.stats-rank{
    position:absolute;
    top:14px;
    right:14px;
    min-width:46px;
    height:46px;
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    background:linear-gradient(135deg,#0ea5e9,#6366f1);
    color:#fff;
    font-weight:900;
    box-shadow:0 10px 20px rgba(99,102,241,.25);
}

.stats-student-top{
    display:flex;
    gap:14px;
    align-items:center;
    margin-bottom:16px;
}

.stats-student-top img{
    width:72px;
    height:72px;
    object-fit:cover;
    border-radius:50%;
    border:5px solid #eef4ff;
}

.stats-student-top h3{
    margin:0;
    font-size:21px;
    font-weight:900;
    color:#0f172a;
}

.stats-student-top p{
    margin:6px 0 0;
    color:#64748b;
    font-weight:700;
}

.stats-lines{
    display:grid;
    gap:10px;
}

.stats-lines div{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:10px 12px;
    background:#f8fbff;
    border-radius:14px;
}

.stats-lines span{
    color:#475569;
    font-weight:700;
}

.stats-lines strong{
    font-size:18px;
    font-weight:900;
    color:#0f172a;
}

.stats-lines strong.ok{ color:#16a34a; }
.stats-lines strong.bad{ color:#ef4444; }
.stats-lines strong.score{ color:#2563eb; }

.stats-empty{
    grid-column:1/-1;
    text-align:center;
    padding:30px;
    background:#fff;
    border-radius:20px;
    border:1px dashed #cbd5e1;
    color:#64748b;
    font-weight:700;
}

@media (max-width: 1100px){
    .stats-grid{
        grid-template-columns:repeat(2,1fr);
    }
    .stats-summary{
        grid-template-columns:repeat(2,1fr);
    }
}

@media (max-width: 700px){
    .stats-grid,
    .stats-summary{
        grid-template-columns:1fr;
    }

    .stats-header h2{
        font-size:24px;
    }
}
.stats-top-right{
    display:flex;
    flex-direction:column;
    gap:12px;
    align-items:flex-end;
}

.stats-actions{
    display:flex;
    justify-content:flex-end;
}

.danger-btn{
    height:46px;
    border:none;
    border-radius:14px;
    padding:0 18px;
    font-weight:800;
    color:#fff;
    cursor:pointer;
    background:linear-gradient(135deg,#ef4444,#dc2626);
    box-shadow:0 10px 20px rgba(239,68,68,.22);
    transition:.25s ease;
}

.danger-btn:hover{
    transform:translateY(-2px);
    box-shadow:0 14px 24px rgba(239,68,68,.28);
}

@media (max-width:700px){
    .stats-top-right{
        width:100%;
        align-items:stretch;
    }

    .stats-actions{
        justify-content:stretch;
    }

    .danger-btn{
        width:100%;
    }
}.protected-body img,
.student-image,
.creator-card img,
.logo-box img,
.image-modal img,
.stats-student-top img {
    -webkit-user-drag: none;
    user-drag: none;
    -webkit-touch-callout: none;
    user-select: none;
    -webkit-user-select: none;
    pointer-events: auto;
}

.protected-body {
    -webkit-user-select: none;
    user-select: none;
}