/* ============================================================
   admin-assignments.css
   ------------------------------------------------------------
   Styles for the assignments admin panel:
     .assignments-panel, .asg-toolbar, .asg-list,
     .asg-card, .asg-card__*, .asg-empty,
     .asg-overlay, .asg-dialog, .asg-dialog__*,
     .asg-rubric, .asg-grader__*, .asg-subs
   ============================================================ */

.assignments-panel {
  display: grid;
  gap: var(--space-4, 1rem);
}

/* ── Toolbar ─────────────────────────────────────────────── */
.asg-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: var(--space-3, 0.75rem);
}
.asg-toolbar__label {
  display: grid;
  gap: 0.25rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted, #6b7280);
  font-weight: 600;
  flex: 0 1 22rem;
}
.asg-toolbar__label .input {
  height: 2.25rem;
  padding: 0 0.625rem;
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-sm, 6px);
  background: var(--color-surface, #fff);
  font-size: 0.875rem;
}

/* ── List of assignment cards ──────────────────────────── */
.asg-list {
  display: grid;
  gap: var(--space-3, 0.75rem);
}
.asg-empty {
  padding: var(--space-5, 1.5rem);
  text-align: center;
  color: var(--color-text-muted, #6b7280);
  font-style: italic;
  border: 1px dashed var(--color-border, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  background: var(--color-surface-alt, #fafbfc);
}

.asg-card {
  display: grid;
  gap: var(--space-2, 0.5rem);
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  background: var(--color-surface, #fff);
}
.asg-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3, 0.75rem);
}
.asg-card__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text, #111827);
}
.asg-card__badge {
  display: inline-flex;
  align-items: center;
  height: 1.5rem;
  padding: 0 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
}
.asg-card__badge.is-published {
  background: rgba(34, 197, 94, 0.12);
  color: #15803d;
}
.asg-card__badge.is-draft {
  background: var(--color-surface-alt, #f3f4f6);
  color: var(--color-text-muted, #6b7280);
}

.asg-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3, 0.75rem);
  color: var(--color-text-muted, #6b7280);
  font-size: 0.8125rem;
}
.asg-card__flag {
  color: var(--color-accent, #4a5cdb);
  font-weight: 600;
}
.asg-card__flag--warn {
  color: #b45309;
}

.asg-card__desc {
  margin: 0;
  color: var(--color-text, #111827);
  font-size: 0.875rem;
  line-height: 1.5;
  white-space: pre-wrap;
}

.asg-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2, 0.5rem);
  border-top: 1px solid var(--color-border, #e5e7eb);
  padding-top: var(--space-2, 0.5rem);
}

/* ── Overlay + dialog ───────────────────────────────────── */
.asg-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.48);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3, 0.75rem);
  z-index: 60;
}
.asg-dialog {
  background: var(--color-surface, #fff);
  color: var(--color-text, #111827);
  width: min(720px, 100%);
  max-height: min(90vh, 860px);
  border-radius: var(--radius-lg, 14px);
  box-shadow: 0 24px 64px rgba(15, 23, 42, 0.32);
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
}
.asg-dialog--wide {
  width: min(960px, 100%);
  grid-template-rows: auto 1fr;
}
.asg-dialog__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
  border-bottom: 1px solid var(--color-border, #e5e7eb);
}
.asg-dialog__title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.asg-dialog__close {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--color-text-muted, #6b7280);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm, 6px);
}
.asg-dialog__close:hover { background: var(--color-surface-alt, #f3f4f6); }

.asg-dialog__body {
  overflow: auto;
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
  display: grid;
  gap: var(--space-3, 0.75rem);
}
.asg-dialog__row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: var(--space-3, 0.75rem);
}
.asg-dialog__textarea {
  min-height: 5rem;
  padding: 0.5rem 0.625rem;
  font-family: inherit;
  font-size: 0.875rem;
  line-height: 1.5;
  resize: vertical;
}
.asg-dialog__foot {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2, 0.5rem);
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
  border-top: 1px solid var(--color-border, #e5e7eb);
  background: var(--color-surface-alt, #fafbfc);
}

.asg-dialog__body .field {
  display: grid;
  gap: 0.25rem;
}
.asg-dialog__body .field__label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted, #6b7280);
}
.asg-dialog__body .field--inline {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text, #111827);
  font-weight: 500;
}
.asg-dialog__body .input {
  height: 2.25rem;
  padding: 0 0.625rem;
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-sm, 6px);
  background: var(--color-surface, #fff);
  font-size: 0.875rem;
}

/* ── Rubric editor ──────────────────────────────────────── */
.asg-rubric {
  display: grid;
  gap: var(--space-2, 0.5rem);
  padding: var(--space-3, 0.75rem);
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  background: var(--color-surface-alt, #fafbfc);
}
.asg-rubric__title {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 600;
}
.asg-rubric__list {
  display: grid;
  gap: 0.375rem;
}
.asg-rubric__row {
  display: grid;
  grid-template-columns: 1fr 5rem 5rem auto;
  gap: 0.375rem;
  align-items: center;
}
.asg-rubric__num {
  text-align: right;
}

/* ── Submissions table ──────────────────────────────────── */
.asg-subs {
  width: 100%;
  overflow-x: auto;
}
.asg-subs__table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.asg-subs__table th,
.asg-subs__table td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--color-border, #e5e7eb);
  text-align: left;
  vertical-align: middle;
}
.asg-subs__table th {
  background: var(--color-surface-alt, #fafbfc);
  font-weight: 600;
  color: var(--color-text-muted, #6b7280);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.asg-subs__status {
  display: inline-flex;
  align-items: center;
  height: 1.5rem;
  padding: 0 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  background: var(--color-surface-alt, #f3f4f6);
  color: var(--color-text-muted, #6b7280);
}
.asg-subs__status--submitted {
  background: rgba(59, 130, 246, 0.12);
  color: #1d4ed8;
}
.asg-subs__status--graded {
  background: rgba(34, 197, 94, 0.12);
  color: #15803d;
}
.asg-subs__status--returned {
  background: rgba(168, 85, 247, 0.12);
  color: #7e22ce;
}

/* ── Grader preview + rubric ─────────────────────────── */
.asg-grader__section-title {
  margin: 0 0 0.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text, #111827);
}
.asg-grader__preview {
  padding: var(--space-3, 0.75rem);
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  background: var(--color-surface-alt, #fafbfc);
}
.asg-grader__body {
  white-space: pre-wrap;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-text, #111827);
  max-height: 12rem;
  overflow: auto;
}
.asg-grader__url {
  margin: 0.5rem 0 0;
  font-size: 0.875rem;
  word-break: break-all;
}
.asg-grader__files {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
  display: grid;
  gap: 0.25rem;
  font-size: 0.875rem;
}
.asg-grader__rubric {
  display: grid;
  gap: 0.5rem;
  padding: var(--space-3, 0.75rem);
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-md, 10px);
}
.asg-grader__rubric-row {
  display: grid;
  grid-template-columns: 1fr 6rem;
  gap: 0.5rem;
  align-items: center;
}
.asg-grader__rubric-label {
  font-size: 0.875rem;
  color: var(--color-text, #111827);
}

/* ── Narrow screens ─────────────────────────────────────── */
@media (max-width: 720px) {
  .asg-toolbar { flex-direction: column; align-items: stretch; }
  .asg-toolbar__label { flex: 1 1 auto; }
  .asg-rubric__row {
    grid-template-columns: 1fr;
  }
  .asg-rubric__num { text-align: left; }
  .asg-dialog__row { grid-template-columns: 1fr; }
  .asg-grader__rubric-row { grid-template-columns: 1fr; }
}