/*
  Scoped stylesheet for InstitutionsModule's exam-scheduling feature (آزمون‌های موسسه).
  همه‌ی کلاس‌ها با پیشوند "iex-" — هم‌الگو با mtn-/exm-/res-/sam- در ماژول‌های اخیر پروژه،
  تا با کلاس‌های سراسری و بدون‌پیشوندِ Institutions.css (که خودش قبلاً به‌صورت global لود
  می‌شه) تداخل نکنه.
*/

.iex-page {
  --iex-bg: #f5f5f3;
  --iex-surface: #ffffff;
  --iex-border: rgba(0,0,0,0.08);
  --iex-border-strong: rgba(0,0,0,0.14);
  --iex-text: #1a1a18;
  --iex-text-2: #5a5a56;
  --iex-text-3: #9a9994;
  --iex-accent: #2563eb;
  --iex-accent-bg: #eff6ff;
  --iex-accent-text: #1d4ed8;
  --iex-accent-border: #bfdbfe;
  --iex-danger: #dc2626;
  --iex-danger-bg: #fef2f2;
  --iex-danger-text: #b91c1c;
  --iex-radius: 10px;
  --iex-radius-lg: 14px;
  color: var(--iex-text);
}

@media (prefers-color-scheme: dark) {
  .iex-page {
    --iex-bg: #17171a; --iex-surface: #202024; --iex-border: rgba(255,255,255,0.09);
    --iex-border-strong: rgba(255,255,255,0.15); --iex-text: #f0f0ee; --iex-text-2: #b3b3ad;
    --iex-text-3: #7a7a75; --iex-accent-bg: rgba(37,99,235,0.16); --iex-danger-bg: rgba(220,38,38,0.14);
  }
}

.iex-back { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: var(--iex-text-2); text-decoration: none; margin-bottom: 10px; }
.iex-title-row { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 12px; }
.iex-title { font-size: 17px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.iex-title i { color: var(--iex-accent); }
.iex-desc { font-size: 12.5px; color: var(--iex-text-2); margin-top: 4px; max-width: 640px; line-height: 1.8; }
.iex-hdr-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.iex-hdr { margin-bottom: 18px; }

.iex-btn {
  display: inline-flex; align-items: center; gap: 6px; height: 38px; padding: 0 16px;
  border-radius: var(--iex-radius); border: 1px solid var(--iex-border-strong); background: var(--iex-surface);
  color: var(--iex-text); font-size: 12.5px; font-weight: 600; cursor: pointer; white-space: nowrap;
}
.iex-btn.primary { background: var(--iex-accent); border-color: var(--iex-accent); color: #fff; }
.iex-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.iex-icon-btn {
  width: 30px; height: 30px; border-radius: var(--iex-radius); border: 1px solid var(--iex-border);
  background: var(--iex-surface); color: var(--iex-text-2); display: inline-flex; align-items: center; justify-content: center; cursor: pointer;
}
.iex-icon-btn:hover { background: var(--iex-accent-bg); border-color: var(--iex-accent-border); color: var(--iex-accent-text); }
.iex-icon-btn.danger:hover { background: var(--iex-danger-bg); border-color: var(--iex-danger); color: var(--iex-danger-text); }

.iex-stats { display: flex; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.iex-stat { background: var(--iex-surface); border: 1px solid var(--iex-border); border-radius: var(--iex-radius); padding: 12px 18px; min-width: 100px; }
.iex-stat-num { display: block; font-size: 20px; font-weight: 800; }
.iex-stat-label { font-size: 11px; color: var(--iex-text-2); }

.iex-skeleton { height: 220px; border-radius: var(--iex-radius-lg); background: linear-gradient(90deg, var(--iex-bg) 25%, var(--iex-border) 37%, var(--iex-bg) 63%); background-size: 400% 100%; animation: iex-shimmer 1.4s ease infinite; }
@keyframes iex-shimmer { 0% { background-position: 100% 50%; } 100% { background-position: 0 50%; } }

.iex-empty { text-align: center; padding: 60px 20px; color: var(--iex-text-3); }
.iex-empty i { font-size: 40px; margin-bottom: 12px; display: block; opacity: 0.4; }
.iex-empty p { font-size: 13px; margin-bottom: 16px; }

.iex-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.iex-card { background: var(--iex-surface); border: 1px solid var(--iex-border); border-radius: var(--iex-radius-lg); overflow: hidden; display: flex; flex-direction: column; }
.iex-card-cover { position: relative; aspect-ratio: 4/3; background: var(--iex-bg); }
.iex-card-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.iex-card-cover-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; color: var(--iex-text-3); font-size: 30px; }
.iex-card-date-badge { position: absolute; bottom: 8px; right: 8px; background: rgba(0,0,0,0.7); color: #fff; font-size: 10.5px; font-weight: 700; padding: 3px 9px; border-radius: 999px; }
.iex-card-date-badge.past { background: rgba(220,38,38,0.85); }

.iex-card-body { padding: 12px 14px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.iex-card-title { font-size: 13.5px; font-weight: 700; line-height: 1.5; }
.iex-card-meta { display: flex; gap: 10px; font-size: 11px; color: var(--iex-text-2); flex-wrap: wrap; }
.iex-card-books { display: flex; gap: 5px; flex-wrap: wrap; }
.iex-book-chip { background: var(--iex-accent-bg); color: var(--iex-accent-text); font-size: 10px; font-weight: 600; padding: 2px 8px; border-radius: 999px; }
.iex-book-chip.more { background: var(--iex-bg); color: var(--iex-text-3); }
.iex-card-footer { margin-top: auto; display: flex; align-items: center; justify-content: space-between; padding-top: 8px; border-top: 1px solid var(--iex-border); }
.iex-chapter-count { font-size: 10.5px; color: var(--iex-text-3); display: inline-flex; align-items: center; gap: 4px; }
.iex-card-actions { display: flex; gap: 4px; }

/* ── فرم افزودن/ویرایش (Modal) ── */
.iex-modal-backdrop { position: fixed; inset: 0; background: rgba(15,15,14,0.5); z-index: 10060; display: flex; align-items: center; justify-content: center; padding: 20px; }
.iex-modal { width: 100%; max-width: 640px; max-height: 90vh; overflow-y: auto; background: var(--iex-surface); border-radius: var(--iex-radius-lg); border: 1px solid var(--iex-border); box-shadow: 0 24px 64px rgba(0,0,0,0.32); }
.iex-modal-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; border-bottom: 1px solid var(--iex-border); position: sticky; top: 0; background: var(--iex-surface); z-index: 1; }
.iex-modal-title { font-size: 14px; font-weight: 700; }
.iex-modal-body { padding: 18px; display: flex; flex-direction: column; gap: 14px; }
.iex-modal-actions { display: flex; justify-content: flex-end; gap: 8px; padding: 14px 18px; border-top: 1px solid var(--iex-border); position: sticky; bottom: 0; background: var(--iex-surface); }

.iex-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 560px) { .iex-form-row { grid-template-columns: 1fr; } }
.iex-field label { display: block; font-size: 11.5px; color: var(--iex-text-2); margin-bottom: 6px; font-weight: 600; }
.iex-input {
  width: 100%; min-height: 38px; border-radius: var(--iex-radius); border: 1px solid var(--iex-border-strong);
  padding: 0 12px; font-size: 12.5px; background: var(--iex-bg); color: var(--iex-text); font-family: inherit;
}
textarea.iex-input { padding: 8px 12px; }
.iex-input:focus { outline: none; border-color: var(--iex-accent); }
.iex-hint { font-size: 11px; color: var(--iex-text-3); padding: 8px 0; }

.iex-cover-preview { width: 100%; max-width: 220px; aspect-ratio: 4/3; object-fit: cover; border-radius: var(--iex-radius); margin-bottom: 8px; display: block; }

.iex-book-list { display: flex; flex-direction: column; gap: 4px; max-height: 160px; overflow-y: auto; border: 1px solid var(--iex-border); border-radius: var(--iex-radius); padding: 8px; }
.iex-check-item { display: flex; align-items: center; gap: 8px; font-size: 12px; cursor: pointer; padding: 3px 4px; border-radius: 6px; }
.iex-check-item:hover { background: var(--iex-bg); }
.iex-check-item input { flex-shrink: 0; }

.iex-chapter-tree-book { border: 1px solid var(--iex-border); border-radius: var(--iex-radius); padding: 10px; margin-bottom: 8px; }
.iex-chapter-tree-book-title { font-size: 12px; font-weight: 700; margin-bottom: 8px; display: flex; align-items: center; gap: 6px; color: var(--iex-accent-text); }
.iex-chapter-tree { max-height: 220px; overflow-y: auto; }
.iex-tree-node { margin-bottom: 2px; }
.iex-tree-children { padding-right: 20px; border-right: 1px dashed var(--iex-border); margin-right: 8px; }

.iex-spinner { width: 14px; height: 14px; border: 2px solid rgba(255,255,255,0.4); border-top-color: #fff; border-radius: 50%; animation: iex-spin 0.7s linear infinite; display: inline-block; }
@keyframes iex-spin { to { transform: rotate(360deg); } }

.ins-exams-link { color: var(--c-accent, #2563eb); font-weight: 700; text-decoration: none; }
.ins-exams-link:hover { text-decoration: underline; }