/* ═══════════════════════════════════════════════════════════
   الاستثمارات — مسابقات ضمن برنامج التميز
   لوحة الإدارة + محرّر الأسئلة + التصحيح + واجهة الطالب
   ═══════════════════════════════════════════════════════════ */

/* ── شبكة بطاقات المسابقات (الإدارة) ── */
.inv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.inv-card {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.inv-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.inv-card-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.inv-card-head h4 { margin: 0; font-size: 1rem; font-weight: 800; flex: 1; min-width: 0; word-break: break-word; }
.inv-card-icon {
  width: 38px; height: 38px; flex-shrink: 0;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 1.05rem;
}
.inv-card-meta { display: flex; flex-wrap: wrap; gap: 10px; font-size: 0.8rem; color: var(--text-secondary); }
.inv-card-meta i { color: var(--ocean-blue); margin-left: 3px; }
.inv-card-sched { font-size: 0.8rem; color: var(--text-muted); }
.inv-card-sched i { color: var(--orange); margin-left: 3px; }
.inv-card-stats { display: flex; flex-wrap: wrap; gap: 12px; font-size: 0.82rem; font-weight: 600; }
.inv-card-stats i { margin-left: 3px; color: var(--ocean-blue); }
.inv-pending { color: var(--orange-dark); }
.inv-pending i { color: var(--orange-dark); }
.inv-card-actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 6px; }

/* ── مفتاح تبديل (مؤقّت) ── */
.inv-switch { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-size: 0.9rem; font-weight: 600; }
.inv-switch input { width: 18px; height: 18px; accent-color: var(--ocean-blue); }

/* ── محرّر الأسئلة ── */
.inv-q-block {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 14px;
  background: var(--ocean-blue-50);
}
.inv-q-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 10px; flex-wrap: wrap; }
.inv-q-type {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.82rem; font-weight: 700;
  padding: 4px 10px; border-radius: var(--radius-full);
}
.inv-q-type.mcq { background: var(--ocean-blue-100); color: var(--ocean-blue-dark); }
.inv-q-type.essay { background: var(--orange-100); color: var(--orange-dark); }
.inv-options { margin-top: 8px; }
.inv-option-row { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.inv-option-row input[type="radio"] { width: 18px; height: 18px; flex-shrink: 0; accent-color: var(--mint-dark); }
.inv-option-row .form-input { flex: 1; }
.inv-essay-note {
  font-size: 0.82rem; color: var(--orange-dark);
  background: var(--orange-50); border-radius: var(--radius-sm);
  padding: 8px 10px; margin: 8px 0;
}
.inv-essay-note i { margin-left: 4px; }
.inv-q-points { display: flex; align-items: center; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.inv-q-points label { font-weight: 700; font-size: 0.88rem; }

/* ── رفع/معاينة صورة السؤال ── */
.inv-img-upload {
  display: inline-flex; align-items: center; gap: 8px;
  cursor: pointer; font-size: 0.85rem; font-weight: 600;
  color: var(--ocean-blue-dark);
  border: 1.5px dashed var(--ocean-blue-200);
  border-radius: var(--radius-md);
  padding: 10px 14px; margin: 4px 0 10px;
}
.inv-img-upload:hover { background: var(--ocean-blue-50); }
.inv-img-preview { margin: 6px 0 10px; }
.inv-img-preview img {
  max-width: 100%; max-height: 220px; display: block;
  border-radius: var(--radius-md); border: 1px solid var(--border-color); margin-bottom: 8px;
}

/* ── جدول الإجابات والتصحيح ── */
.inv-submissions .stat-card { min-height: auto; }

/* ── نافذة التصحيح ── */
.inv-grade-modal, .inv-result { max-width: 100%; }
.inv-grade-meta {
  background: var(--ocean-blue-50); border-radius: var(--radius-md);
  padding: 10px 14px; margin-bottom: 14px; font-size: 0.9rem;
}
.inv-grade-q {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 14px; margin-bottom: 12px;
}
.inv-grade-qhead { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.inv-grade-qtext { margin: 0 0 8px; font-weight: 600; line-height: 1.6; }
.inv-grade-img { max-width: 100%; max-height: 220px; border-radius: var(--radius-md); border: 1px solid var(--border-color); margin-bottom: 8px; display: block; }
.inv-grade-opts { display: flex; flex-direction: column; gap: 6px; }
.inv-grade-opt {
  padding: 8px 12px; border-radius: var(--radius-sm);
  background: var(--bg-secondary); font-size: 0.9rem;
  display: flex; align-items: center; gap: 8px;
}
.inv-grade-opt.inv-opt-correct { background: var(--success-bg); color: var(--mint-dark); font-weight: 700; }
.inv-grade-opt.inv-opt-wrong { background: var(--danger-bg); color: var(--danger); font-weight: 700; }
.inv-grade-answer {
  background: var(--bg-secondary); border-radius: var(--radius-sm);
  padding: 10px 12px; margin: 8px 0; line-height: 1.7; white-space: pre-wrap; word-break: break-word;
}
.inv-grade-answer i { color: var(--ocean-blue); margin-left: 6px; }
.inv-grade-score { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.inv-grade-score label { font-weight: 700; font-size: 0.88rem; }

/* ── واجهة الطالب: قائمة المسابقات ── */
.inv-stu-list { display: flex; flex-direction: column; gap: 10px; }
.inv-stu-row {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  flex-wrap: wrap;
  padding: 12px 14px; border-radius: var(--radius-md);
  background: var(--ocean-blue-50); border: 1px solid var(--border-color);
}
.inv-stu-info { display: flex; flex-direction: column; gap: 3px; min-width: 0; flex: 1; }
.inv-stu-title { font-weight: 800; font-size: 0.98rem; }
.inv-stu-meta { font-size: 0.78rem; color: var(--text-muted); }
.inv-stu-meta i { color: var(--ocean-blue); }
.inv-stu-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* ── واجهة حل المسابقة ── */
.inv-take-top { position: sticky; top: 0; z-index: 2; background: var(--bg-white); padding-bottom: 10px; margin-bottom: 6px; border-bottom: 1px solid var(--border-color); }
.inv-take-desc { margin: 0 0 10px; font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; }
.inv-take-timer {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 800; font-size: 1.05rem;
  background: var(--ocean-blue-100); color: var(--ocean-blue-dark);
  padding: 6px 16px; border-radius: var(--radius-full);
}
.inv-take-timer.open { background: var(--mint-50); color: var(--mint-dark); font-size: 0.9rem; }
.inv-take-timer.danger { background: var(--danger-bg); color: var(--danger); animation: inv-pulse 1s infinite; }
@keyframes inv-pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.55; } }
.inv-take-body { display: flex; flex-direction: column; gap: 14px; }
.inv-take-q {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
}
.inv-take-qhead { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 8px; flex-wrap: wrap; }
.inv-take-pts { font-size: 0.8rem; font-weight: 700; color: var(--orange-dark); }
.inv-take-qtext { margin: 0 0 10px; font-weight: 700; line-height: 1.7; }
.inv-take-img { max-width: 100%; max-height: 260px; border-radius: var(--radius-md); border: 1px solid var(--border-color); margin-bottom: 10px; display: block; }
.inv-take-opts { display: flex; flex-direction: column; gap: 8px; }
.inv-take-opt {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-radius: var(--radius-md);
  background: var(--bg-secondary); cursor: pointer;
  transition: background var(--transition-fast);
}
.inv-take-opt:hover { background: var(--ocean-blue-50); }
.inv-take-opt input[type="radio"] { width: 20px; height: 20px; flex-shrink: 0; accent-color: var(--ocean-blue); }

/* ── ملخّص نتيجة الطالب ── */
.inv-result-summary {
  display: flex; align-items: center; gap: 14px;
  padding: 16px; border-radius: var(--radius-lg);
  margin-bottom: 16px;
}
.inv-result-summary.done { background: var(--success-bg); }
.inv-result-summary.pending { background: var(--warning-bg); }
.inv-result-summary > i { font-size: 2rem; }
.inv-result-summary.done > i { color: var(--mint-dark); }
.inv-result-summary.pending > i { color: var(--yellow-dark); }
.inv-result-score { font-size: 1.6rem; font-weight: 900; color: var(--text-primary); }
.inv-result-sub { font-size: 0.85rem; color: var(--text-secondary); margin-top: 2px; }
.inv-result-note { font-size: 0.8rem; color: var(--text-muted); margin-top: 6px; }

@media (max-width: 640px) {
  .inv-grid { grid-template-columns: 1fr; }
  .inv-stu-row { flex-direction: column; align-items: stretch; }
  .inv-stu-actions { justify-content: space-between; }
}