/* ═══ Upload Screen ═══ */
#s-upload {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  gap: 20px;
}

.upload-card {
  width: 100%;
  max-width: 640px;
  background: var(--bg-primary);
  border: 0.5px solid var(--border-tertiary);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.drop-zone {
  border: 1.5px dashed var(--border-secondary);
  border-radius: var(--radius-md);
  margin: 20px;
  padding: 36px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.drop-zone:hover,
.drop-zone.drag {
  border-color: var(--teal);
  background: var(--teal-light);
}

.drop-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.drop-title { font-size: 14px; font-weight: 500; }
.drop-sub { font-size: 12px; color: var(--text-secondary); }

.or-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 20px;
  font-size: 12px;
  color: var(--text-tertiary);
}

.or-row::before,
.or-row::after {
  content: '';
  flex: 1;
  height: 0.5px;
  background: var(--border-tertiary);
}

.paste-area {
  margin: 10px 20px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.paste-area textarea {
  width: 100%;
  height: 90px;
  font-size: 12px;
  font-family: var(--font-mono);
  padding: 10px;
  border: 0.5px solid var(--border-tertiary);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  color: var(--text-primary);
  resize: none;
}

.paste-area textarea::placeholder { color: var(--text-tertiary); }

.field-label {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.prompt-area {
  margin: 12px 20px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.prompt-area input {
  width: 100%;
  font-size: 13px;
  padding: 8px 12px;
  border: 0.5px solid var(--border-tertiary);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-family: var(--font-sans);
}

.genre-area {
  margin: 12px 20px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.genre-area select {
  width: 100%;
  font-size: 13px;
  padding: 8px 12px;
  border: 0.5px solid var(--border-tertiary);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 5l3 3 3-3' fill='none' stroke='%23999' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
}

.genre-area select:focus {
  outline: none;
  border-color: var(--teal);
}

.options-row {
  display: flex;
  gap: 8px;
  margin: 14px 20px;
  flex-wrap: wrap;
}

.opt-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border: 0.5px solid var(--border-tertiary);
  border-radius: 20px;
  font-size: 11px;
  cursor: pointer;
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.opt-chip.on {
  background: var(--teal-light);
  border-color: #0D9488;
  color: #065F46;
}

.opt-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.6;
}

.run-btn {
  display: block;
  width: calc(100% - 40px);
  margin: 0 20px 20px;
  padding: 11px;
  background: var(--navy);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s;
  font-family: var(--font-sans);
}

.run-btn:hover { opacity: 0.88; }
.run-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.sample-link {
  font-size: 12px;
  color: var(--teal);
  cursor: pointer;
  text-decoration: underline;
}

.browse-btn {
  font-size: 12px;
  padding: 5px 14px;
  border: 0.5px solid var(--border-secondary);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  cursor: pointer;
  margin-top: 4px;
  font-family: var(--font-sans);
}

.upload-section-label {
  padding: 12px 20px 4px;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.learner-id-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  font-size: 12px;
}

.learner-id-row span { color: var(--text-secondary); }

.learner-id-row input {
  border: none;
  background: transparent;
  font-size: 12px;
  font-family: var(--font-mono);
  width: 120px;
  color: var(--text-primary);
}

.learner-id-hint {
  margin-left: auto;
  color: var(--text-tertiary);
  font-size: 11px;
}