/* ========================================
   Exercises Screen — Homework & Assignment Hub
   ======================================== */

#screen-exercises {
  padding: 16px;
  padding-top: max(16px, env(safe-area-inset-top));
  padding-bottom: 80px;
}

.exercises-header {
  margin-bottom: 16px;
  padding-top: 8px;
}

.ex-header-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.ex-header-logo {
  height: 26px;
}

.ex-header-subtitle {
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 300;
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  color: var(--text-muted);
}

.exercises-header h1 {
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 300;
  font-size: 1.2rem;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
  width: 100%;
}

/* ---- Summary bar ---- */
.ex-summary-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.ex-summary-stat {
  flex: 1;
  text-align: center;
  padding: 12px 8px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.ex-summary-num {
  display: block;
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1.2;
}

.ex-num-pending { color: #f0a030; }
.ex-num-submitted { color: var(--tier-blue); }
.ex-num-reviewed { color: var(--tier-green); }

.ex-summary-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 2px;
}

/* ---- Accordion Sections ---- */
.ex-section {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin-bottom: 10px;
}

.ex-section-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  cursor: pointer;
  transition: background 0.2s ease;
}

.ex-section-header:hover {
  background: var(--bg-card-hover);
}

.ex-section-icon {
  width: 68px;
  height: 68px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: 50%;
  background: #0a0a0a;
  border: none;
}

.ex-section-icon-round {
  object-fit: cover;
  border-radius: 12px;
}

.ex-section-info {
  flex: 1;
  min-width: 0;
  padding-top: 4px;
}

.ex-section-title {
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.ex-section-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.ex-header-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  padding-top: 4px;
}

.ex-pending-count {
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 500;
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.ex-fear-badge {
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 600;
  font-size: 0.7rem;
  color: var(--tier-red);
  white-space: nowrap;
}

.ex-toggle-arrow {
  font-size: 1rem;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.ex-section-header > .ex-toggle-arrow {
  margin-left: auto;
}

.ex-section-body {
  padding: 0 16px 16px;
  transition: max-height 0.3s ease, opacity 0.3s ease;
  max-height: 4000px;
  opacity: 1;
}

.ex-section-body.collapsed {
  max-height: 0;
  opacity: 0;
  padding: 0 16px;
  overflow: hidden;
}

/* ---- Empty message ---- */
.ex-empty-msg {
  text-align: center;
  padding: 24px 16px;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-style: italic;
}

/* ---- Homework cards ---- */
.ex-hw-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  transition: border-color 0.2s ease;
}

.ex-hw-card.ex-hw-overdue {
  border-left: 3px solid #f0a030;
}

/* Accordion summary row */
.ex-hw-summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.ex-hw-summary:hover {
  background: rgba(255, 255, 255, 0.03);
}

.ex-hw-summary-title {
  flex: 1;
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ex-hw-summary-due {
  font-size: 0.7rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.ex-hw-summary-arrow {
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

/* Accordion detail area */
.ex-hw-detail {
  padding: 0 14px 14px;
}

.ex-hw-detail.collapsed {
  display: none;
}

/* Status badges */
.ex-status-badge {
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 600;
  font-size: 0.55rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: 10px;
  flex-shrink: 0;
}

.ex-badge-pending {
  color: #f0a030;
  background: rgba(240, 160, 48, 0.12);
}

.ex-badge-submitted {
  color: var(--tier-blue);
  background: rgba(74, 158, 255, 0.12);
}

.ex-badge-reviewed {
  color: var(--tier-green);
  background: rgba(68, 204, 68, 0.12);
}

.ex-hw-title {
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.ex-hw-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 8px;
  white-space: pre-wrap;
}

.ex-hw-media {
  margin-bottom: 10px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.ex-media-frame {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius-sm);
  background: #000;
}

.ex-media-img {
  width: 100%;
  border-radius: var(--radius-sm);
}

.ex-file-link {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--accent-blue);
  text-decoration: underline;
}

.ex-hw-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.ex-hw-due {
  font-weight: 500;
}

.ex-overdue-text {
  color: #f0a030;
  font-weight: 600;
}

/* ---- Response area (pending) ---- */
.ex-hw-response-area {
  border-top: 1px solid var(--border-color);
  padding-top: 10px;
}

.ex-hw-response {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 0.8rem;
  color: var(--text-primary);
  resize: none;
  font-family: inherit;
  transition: border-color 0.2s ease;
  margin-bottom: 8px;
}

.ex-hw-response:focus {
  border-color: var(--accent-blue);
  outline: none;
}

.ex-hw-response::placeholder {
  color: var(--text-muted);
}

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

.ex-hw-submit-btn {
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  background: var(--accent-blue);
  color: #fff;
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 600;
  font-size: 0.75rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.ex-hw-submit-btn:hover {
  background: #3d8ae0;
  transform: translateY(-1px);
}

.ex-hw-submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ---- File upload zone ---- */
.ex-hw-upload-zone {
  margin-bottom: 10px;
}

.ex-hw-upload-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  border: 1px dashed var(--border-color);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.ex-hw-upload-label:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

.ex-hw-upload-icon {
  font-size: 1rem;
  line-height: 1;
}

.ex-hw-upload-hint {
  display: block;
  font-size: 0.6rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.ex-hw-file-list {
  margin-top: 6px;
}

.ex-hw-queued-file {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  background: rgba(74, 158, 255, 0.06);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent-blue);
  margin-bottom: 4px;
}

.ex-hw-queued-name {
  font-size: 0.75rem;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  margin-right: 8px;
}

.ex-hw-queued-size {
  font-size: 0.65rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* ---- Attached files (submitted/reviewed) ---- */
.ex-hw-files {
  margin-bottom: 8px;
}

.ex-hw-file-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 4px;
}

.ex-hw-file-thumb {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
}

.ex-hw-file-name {
  font-size: 0.75rem;
  color: var(--accent-blue);
  text-decoration: underline;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.ex-hw-file-size {
  font-size: 0.65rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* ---- Submitted / Reviewed info ---- */
.ex-hw-submitted-info,
.ex-hw-reviewed-info {
  border-top: 1px solid var(--border-color);
  padding-top: 10px;
}

.ex-hw-submitted-label {
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 600;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.ex-hw-submitted-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
  padding: 8px 10px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--tier-blue);
  margin-bottom: 6px;
  white-space: pre-wrap;
}

.ex-hw-submitted-time {
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.ex-hw-coach-note-label {
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 600;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--tier-green);
  margin-top: 10px;
  margin-bottom: 4px;
}

.ex-hw-coach-note {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
  padding: 8px 10px;
  background: rgba(68, 204, 68, 0.05);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--tier-green);
  margin-bottom: 6px;
  white-space: pre-wrap;
}

/* ---- Fear rows with counter ---- */
.ex-fear-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.ex-fear-text {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 0.8rem;
  color: var(--text-primary);
  font-family: inherit;
  transition: border-color 0.2s ease;
}

.ex-fear-text:focus {
  border-color: var(--tier-red);
  outline: none;
}

.ex-fear-text::placeholder {
  color: var(--text-muted);
}

.ex-fear-counter {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
}

.ex-counter-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.ex-counter-btn:hover {
  border-color: var(--tier-red);
  color: var(--tier-red);
}

.ex-counter-minus { border-radius: 50% 0 0 50%; }
.ex-counter-plus { border-radius: 0 50% 50% 0; }

.ex-counter-value {
  width: 40px;
  height: 44px;
  text-align: center;
  border: 1px solid var(--border-color);
  border-left: none;
  border-right: none;
  background: var(--bg-input);
  color: var(--tier-red);
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  -moz-appearance: textfield;
}

.ex-counter-value::-webkit-outer-spin-button,
.ex-counter-value::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.ex-fear-total {
  text-align: right;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border-color);
}

.ex-fear-total strong {
  color: var(--tier-red);
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 700;
  font-size: 1rem;
}

/* ---- Gratitude fields ---- */
.ex-gratitude-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.ex-gratitude-field {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 0.8rem;
  color: var(--text-primary);
  font-family: inherit;
  transition: border-color 0.2s ease;
}

.ex-gratitude-field:focus {
  border-color: var(--tier-green);
  outline: none;
}

.ex-gratitude-field::placeholder {
  color: var(--text-muted);
}

/* ---- Structured instruction fields ---- */
.ex-instruction-field {
  margin-bottom: 10px;
}

.ex-instruction-label {
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 600;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-blue);
  margin-bottom: 3px;
}

.ex-instruction-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.55;
  white-space: pre-wrap;
}

/* ---- Video list with per-video response ---- */
.ex-video-list {
  margin-bottom: 10px;
}

.ex-video-item {
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.ex-video-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.ex-video-label {
  font-family: 'Montserrat', Helvetica, sans-serif;
  font-weight: 600;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.ex-video-response {
  width: 100%;
  margin-top: 8px;
  padding: 10px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--text-primary);
  font-family: inherit;
  resize: vertical;
  transition: border-color 0.2s ease;
}

.ex-video-response:focus {
  border-color: var(--accent-blue);
  outline: none;
}

.ex-video-response::placeholder {
  color: var(--text-muted);
}

.ex-video-response-display {
  margin-top: 8px;
  padding: 8px 10px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--tier-blue);
}

/* ---- Empty state ---- */
.empty-state {
  text-align: center;
  padding: 48px 16px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ---- Responsive ---- */
@media (max-width: 360px) {
  .ex-fear-row {
    flex-wrap: wrap;
  }
  .ex-fear-text {
    width: 100%;
  }
  .ex-fear-counter {
    margin-left: auto;
  }
  .ex-summary-num {
    font-size: 1.2rem;
  }
}