:root {
  --bg: #f6f7f4;
  --panel: #ffffff;
  --ink: #17201c;
  --muted: #66736c;
  --line: #dfe5dc;
  --accent: #0f766e;
  --accent-2: #b45309;
  --accent-3: #334155;
  --soft: #edf7f5;
  --warn: #fff5df;
  --done: #eef7e8;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--bg);
}

.auth-screen {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: none;
  place-items: center;
  padding: 20px;
  background: rgb(246 247 244 / 92%);
  backdrop-filter: blur(8px);
}

.auth-screen.is-visible {
  display: grid;
}

.auth-card {
  display: grid;
  gap: 16px;
  width: min(420px, 100%);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  background: var(--panel);
  box-shadow: 0 24px 80px rgb(23 32 28 / 18%);
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 4px;
}

.auth-brand h1 {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0;
}

.auth-brand p,
.auth-message {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.auth-card label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.auth-card input {
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  color: var(--ink);
  background: #fff;
}

.auth-card button {
  min-height: 42px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: #fff;
  background: var(--accent);
  cursor: pointer;
  font-weight: 900;
}

.auth-card .auth-mode-toggle {
  border-color: var(--line);
  color: var(--accent);
  background: #fff;
}

.auth-message.is-error {
  color: #b91c1c;
}

button,
input,
select,
textarea {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  padding: 24px;
  border-right: 1px solid var(--line);
  background: #fbfcfa;
}

.brand {
  display: flex;
  gap: 14px;
  align-items: center;
  margin-bottom: 28px;
}

.brand-mark {
  position: relative;
  display: block;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: linear-gradient(135deg, #0f766e 0%, #16867d 58%, #b45309 100%);
  box-shadow: inset 0 0 0 1px rgb(255 255 255 / 28%), 0 10px 22px rgb(15 118 110 / 18%);
}

.brand-mark-paper {
  position: absolute;
  left: 11px;
  top: 8px;
  width: 21px;
  height: 28px;
  border-radius: 4px;
  background: #fff;
  box-shadow: 0 2px 8px rgb(23 32 28 / 18%);
}

.brand-mark-paper::before,
.brand-mark-paper::after {
  content: "";
  position: absolute;
  left: 5px;
  right: 5px;
  height: 2px;
  border-radius: 999px;
  background: #d4ddd8;
}

.brand-mark-paper::before {
  top: 8px;
}

.brand-mark-paper::after {
  top: 15px;
}

.brand-mark-check {
  position: absolute;
  right: 8px;
  bottom: 8px;
  width: 17px;
  height: 10px;
  border-left: 3px solid #fff;
  border-bottom: 3px solid #fff;
  transform: rotate(-45deg);
}

.brand h1,
.topbar h2,
.question-header h3 {
  margin: 0;
  letter-spacing: 0;
}

.brand h1 {
  font-size: 20px;
}

.brand p,
.eyebrow {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.filter-group {
  position: relative;
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.filter-group label {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.filter-group input,
.filter-group select,
.inline-form input,
.inline-form select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  color: var(--ink);
  background: #fff;
}

.filter-group input,
.filter-group select,
.inline-form input,
.inline-form select {
  height: 42px;
}

.filter-group select:disabled {
  color: #9aa6a0;
  background: #edf1ef;
  cursor: not-allowed;
}

.native-filter {
  display: none;
}

.sortable-filter {
  position: relative;
}

.sortable-filter-button {
  position: relative;
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 38px 0 12px;
  color: var(--ink);
  background: #fff;
  cursor: pointer;
  text-align: left;
  font-weight: 800;
}

.sortable-filter-button::after {
  content: "";
  position: absolute;
  right: 14px;
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-65%) rotate(45deg);
}

.sortable-filter.is-open .sortable-filter-button {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgb(15 118 110 / 14%);
}

.sortable-filter.is-disabled .sortable-filter-button {
  color: #9aa6a0;
  background: #edf1ef;
  cursor: not-allowed;
}

.sortable-filter-menu {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(100% + 6px);
  z-index: 15;
  display: none;
  max-height: 320px;
  overflow: auto;
  border: 1px solid #cfd8d2;
  border-radius: 8px;
  padding: 6px;
  background: #fff;
  box-shadow: 0 18px 48px rgb(23 32 28 / 18%);
}

.sortable-filter.is-open .sortable-filter-menu {
  display: grid;
  gap: 2px;
}

.sortable-filter-option {
  width: 100%;
  min-height: 38px;
  border: 0;
  border-radius: 6px;
  padding: 0 10px;
  color: var(--ink);
  background: transparent;
  cursor: grab;
  text-align: left;
  font-weight: 800;
}

.sortable-filter-option:hover {
  background: #f0f3f2;
}

.sortable-filter-option.is-selected {
  color: var(--accent);
  background: var(--soft);
}

.sortable-filter-option.is-fixed {
  position: sticky;
  top: 0;
  z-index: 1;
  color: var(--accent-3);
  background: #fff;
  cursor: default;
}

.sortable-filter-option.is-fixed::after {
  content: "固定";
  float: right;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.sortable-filter-option.is-dragging {
  opacity: 0.48;
  cursor: grabbing;
}

.primary-action,
.inline-form button,
.form-submit,
.ghost-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 0 14px;
  color: #fff;
  background: var(--accent);
  cursor: pointer;
  font-weight: 800;
}

.ghost-button {
  border-color: var(--line);
  color: var(--accent-3);
  background: #fff;
}

.primary-action {
  width: 100%;
}

.profile-mark {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: auto;
  padding-top: 14px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.profile-mark > img {
  display: none !important;
}

.avatar-button {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 8px 18px rgb(23 32 28 / 10%);
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0;
  overflow: hidden;
  color: var(--accent-3);
  font-size: 26px;
  font-weight: 800;
  line-height: 1;
}

.avatar-button .avatar-plus {
  display: none;
}

.avatar-button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.avatar-button img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.logout-button {
  margin-left: auto;
  min-height: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 10px;
  color: var(--accent-3);
  background: #fff;
  cursor: pointer;
  font-size: 12px;
  font-weight: 800;
}

.backup-menu {
  position: relative;
  margin-left: auto;
}

.backup-menu .logout-button {
  margin-left: 0;
}

.backup-menu-panel {
  position: absolute;
  right: 0;
  bottom: calc(100% + 8px);
  z-index: 18;
  display: none;
  width: 170px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px;
  background: #fff;
  box-shadow: 0 16px 44px rgb(23 32 28 / 18%);
}

.backup-menu.is-open .backup-menu-panel {
  display: grid;
  gap: 4px;
}

.backup-menu-item {
  min-height: 34px;
  border: 0;
  border-radius: 6px;
  padding: 0 10px;
  color: var(--accent-3);
  background: transparent;
  cursor: pointer;
  text-align: left;
  font-size: 12px;
  font-weight: 800;
}

.backup-menu-item:hover {
  color: var(--accent);
  background: var(--soft);
}

.primary-action.compact {
  width: auto;
}

.main-content {
  min-width: 0;
  padding: 28px clamp(18px, 4vw, 44px) 44px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  margin-bottom: 20px;
}

.topbar h2 {
  font-size: clamp(28px, 4vw, 42px);
}

.eyebrow {
  margin: 0 0 6px;
  text-transform: uppercase;
  font-size: 12px;
  font-weight: 800;
  color: var(--accent);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(88px, 1fr));
  gap: 10px;
  min-width: 320px;
}

.toggle-owner-button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  color: var(--accent-3);
  background: #fff;
  cursor: pointer;
  font-size: 13px;
  font-weight: 800;
}

.toggle-owner-button:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--soft);
}

.stat-card {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.stat-card strong {
  display: block;
  font-size: 24px;
}

.stat-card span {
  color: var(--muted);
  font-size: 12px;
}

.quick-add {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 14px;
}

.add-question-button {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: #fff;
  background: var(--accent);
  cursor: pointer;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
}

.add-question-button:disabled {
  border-color: #cbd5d1;
  color: #8b9791;
  background: #edf1ef;
  cursor: not-allowed;
}

.subject-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

.tab-button {
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 14px;
  color: var(--accent-3);
  background: #fff;
  cursor: pointer;
}

.tab-button.is-active {
  color: #fff;
  border-color: var(--accent);
  background: var(--accent);
}

.question-list {
  display: grid;
  gap: 16px;
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
}

.pagination button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 14px;
  color: var(--accent-3);
  background: #fff;
  cursor: pointer;
  font-weight: 800;
}

.pagination button:disabled {
  color: #9aa6a0;
  background: #edf1ef;
  cursor: not-allowed;
}

.pagination span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.page-jump {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-jump input {
  width: 72px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 10px;
  color: var(--ink);
  background: #fff;
  text-align: center;
}

.question-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0;
  background: var(--panel);
  overflow: hidden;
}

.question-card.is-pinned-copy {
  border-color: #d9b779;
  background: #fffaf0;
  box-shadow: inset 4px 0 0 #b45309;
}

.question-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  background: #fbfcfa;
}

.question-header h3 {
  margin-top: 8px;
  font-size: 20px;
  line-height: 1.45;
}

.question-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.meta-row,
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.meta,
.tag,
.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 700;
}

.meta {
  color: var(--accent);
  background: var(--soft);
}

.tag {
  color: var(--accent-3);
  background: #f0f3f2;
}

.status-pill {
  flex: 0 0 auto;
  color: #744210;
  background: var(--warn);
}

.status-pill.reviewing {
  color: #0f766e;
  background: var(--soft);
}

.status-pill.mastered {
  color: #3f6212;
  background: var(--done);
}

.delete-question,
.move-question {
  flex: 0 0 auto;
  min-height: 30px;
  border-radius: 8px;
  padding: 0 10px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 800;
}

.delete-question {
  border: 1px solid #fecaca;
  color: #b91c1c;
  background: #fff5f5;
}

.move-question {
  border: 1px solid #cfd9d3;
  color: var(--accent-3);
  background: #fff;
}

.pin-button {
  position: relative;
  flex: 0 0 auto;
  width: 34px;
  height: 30px;
  border: 1px solid #cfd9d3;
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
}

.pin-button::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 5px;
  width: 8px;
  height: 14px;
  border-radius: 4px 4px 2px 2px;
  background: var(--accent-3);
  transform: rotate(35deg);
}

.pin-button::after {
  content: "";
  position: absolute;
  left: 17px;
  top: 16px;
  width: 2px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent-3);
  transform: rotate(35deg);
}

.pin-button:hover,
.pin-button.is-active {
  border-color: #d9b779;
  background: #fff5df;
}

.pin-button.is-active::before,
.pin-button.is-active::after {
  background: #b45309;
}

.delete-question:hover {
  border-color: #fca5a5;
  background: #fee2e2;
}

.move-question:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--soft);
}

.pin-meta {
  color: #92400e;
  background: #fff5df;
}

.owner-meta {
  color: #1e3a8a;
  background: #eaf1ff;
}

.tag-row {
  margin-top: 14px;
}

.card-section {
  padding: 18px 20px 20px;
}

.section-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.section-heading::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.section-label {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border-radius: 8px;
  padding: 0 10px;
  color: var(--accent);
  background: var(--soft);
  font-size: 13px;
  font-weight: 900;
}

.media-block {
  display: grid;
  gap: 10px;
}

.shot {
  width: 100%;
  max-height: 680px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  display: block;
}

.missing-shot {
  display: grid;
  place-items: center;
  min-height: 160px;
  border: 1px dashed #b9c4bd;
  border-radius: 8px;
  color: var(--muted);
  background: #fafbf9;
  text-align: center;
  padding: 18px;
}

.note-block {
  margin-top: 14px;
  color: var(--muted);
  line-height: 1.7;
}

.answer-panel {
  border-top: 1px solid var(--line);
  background: #fff;
}

.answer-panel summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 14px 20px;
  color: var(--accent-2);
  background: #fff8ea;
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

.answer-panel summary::-webkit-details-marker {
  display: none;
}

.answer-panel summary::before {
  content: "";
  width: 9px;
  height: 9px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 160ms ease;
}

.answer-panel[open] summary::before {
  transform: rotate(45deg);
}

.summary-hint {
  margin-left: auto;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.answer-content {
  padding: 18px 20px 20px;
  border-top: 1px solid #f2e3c2;
  line-height: 1.75;
}

.answer-media {
  display: grid;
  gap: 10px;
}

.full-question-content {
  margin-bottom: 18px;
}

.full-question-media {
  display: grid;
  gap: 10px;
}

.note-editor {
  margin-top: 18px;
}

.note-editor label,
.paste-note-field {
  display: grid;
  gap: 10px;
}

.note-header {
  display: flex;
  align-items: center;
  gap: 10px;
}

.note-save-status {
  margin-left: auto;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.note-save-status[data-state="editing"] {
  color: #b45309;
}

.note-save-status[data-state="saving"] {
  color: var(--accent-3);
}

.note-save-status[data-state="saved"],
.note-save-status[data-state="done"] {
  color: var(--accent);
}

.note-save-status[data-state="error"] {
  color: #b91c1c;
}

.finish-note-button {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: #fff;
  background: var(--accent);
  cursor: pointer;
  font-weight: 900;
}

.finish-note-button:hover {
  background: #0c5f59;
}

.question-note,
.paste-note-field textarea {
  width: 100%;
  min-height: 110px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  color: var(--ink);
  background: #fff;
  line-height: 1.7;
}

.question-note:focus,
.paste-note-field textarea:focus {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 3px rgb(15 118 110 / 14%);
}

.empty-state {
  border: 1px dashed #b9c4bd;
  border-radius: 8px;
  padding: 40px 20px;
  text-align: center;
  color: var(--muted);
  background: #fff;
}

.manager-dialog {
  width: min(980px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  border: 0;
  border-radius: 8px;
  padding: 0;
  background: transparent;
}

.manager-dialog::backdrop {
  background: rgb(23 32 28 / 50%);
}

.manager-panel {
  padding: 22px;
  background: var(--panel);
  border-radius: 8px;
  box-shadow: 0 24px 80px rgb(23 32 28 / 22%);
}

.manager-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.manager-header h2,
.manager-section h3 {
  margin: 0;
  letter-spacing: 0;
}

.manager-header h2 {
  font-size: 28px;
}

.dialog-path {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.icon-button {
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--accent-3);
  background: #fff;
  cursor: pointer;
  font-size: 24px;
  line-height: 1;
}

.manager-section {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.manager-section:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.manager-section h3 {
  margin-bottom: 12px;
  font-size: 17px;
}

.inline-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.subject-form {
  grid-template-columns: minmax(150px, 200px) minmax(0, 1fr) auto;
}

.folder-form {
  grid-template-columns: minmax(130px, 170px) minmax(160px, 220px) minmax(0, 1fr) auto;
}

.type-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--accent-3);
  font-size: 15px;
  font-weight: 900;
}

.type-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.module-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.module-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 30px;
  border-radius: 999px;
  padding: 4px 10px;
  color: var(--accent-3);
  background: #f0f3f2;
  font-size: 13px;
  font-weight: 700;
}

.module-chip button {
  min-width: 20px;
  height: 20px;
  border: 0;
  border-radius: 999px;
  padding: 0 5px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
}

.module-chip .rename-chip {
  width: auto;
  font-size: 12px;
  font-weight: 900;
}

.module-chip.is-default button {
  display: none;
}

.form-submit {
  width: max-content;
  min-width: 140px;
}

.paste-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding-top: 18px;
}

.paste-box {
  display: grid;
  align-content: start;
  gap: 8px;
  min-height: 320px;
  border: 1px dashed #aab8b0;
  border-radius: 8px;
  padding: 18px;
  background: #fafbf9;
  outline: none;
}

.paste-box:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgb(15 118 110 / 14%);
}

.paste-box strong {
  font-size: 18px;
}

.paste-box span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.paste-note-field {
  padding-top: 16px;
}

.paste-note-field strong {
  font-size: 16px;
}

.paste-preview {
  margin-top: 10px;
}

.paste-preview:empty {
  display: grid;
  place-items: center;
  min-height: 190px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.paste-preview:empty::before {
  content: "等待图片";
  color: var(--muted);
}

.paste-preview-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 34px;
  gap: 8px;
  align-items: stretch;
}

.paste-preview-item {
  position: relative;
  grid-column: 1;
}

.paste-preview-empty {
  display: grid;
  grid-column: 1;
  place-items: center;
  min-height: 190px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: #fff;
}

.paste-preview-item + .paste-preview-item {
  margin-top: 8px;
}

.paste-preview-item .shot {
  max-height: 260px;
}

.remove-paste-image {
  position: absolute;
  right: 8px;
  top: 8px;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid rgb(23 32 28 / 18%);
  border-radius: 999px;
  color: #fff;
  background: rgb(23 32 28 / 72%);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
}

.remove-paste-image:hover {
  background: #b91c1c;
}

.paste-add-strip {
  grid-column: 2;
  grid-row: 1 / span 20;
  min-height: 190px;
  border: 1px dashed #aab8b0;
  border-radius: 8px;
  color: var(--accent);
  background: #fff;
  cursor: pointer;
  font-size: 26px;
  font-weight: 900;
}

.paste-add-strip:hover {
  border-color: var(--accent);
  background: var(--soft);
}

.paste-add-strip:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgb(15 118 110 / 14%);
  outline: none;
}

.paste-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding-top: 18px;
}

@media (max-width: 860px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .topbar {
    display: grid;
    align-items: stretch;
  }

  .stats {
    min-width: 0;
  }

  .quick-add {
    justify-content: flex-start;
  }

  .paste-grid {
    grid-template-columns: 1fr;
  }

  .paste-box {
    min-height: 260px;
  }

  .paste-preview-list {
    grid-template-columns: minmax(0, 1fr) 48px;
  }
}

@media (max-width: 560px) {
  .sidebar,
  .main-content,
  .question-card {
    padding: 16px;
  }

  .stats {
    grid-template-columns: 1fr;
  }

  .question-header {
    display: grid;
  }

  .inline-form {
    grid-template-columns: 1fr;
  }

  .folder-form {
    grid-template-columns: 1fr;
  }

  .subject-form {
    grid-template-columns: 1fr;
  }

  .primary-action.compact,
  .form-submit {
    width: 100%;
  }

  .paste-actions {
    display: grid;
  }

  .pagination {
    flex-wrap: wrap;
  }

  .page-jump {
    width: 100%;
    justify-content: center;
  }
}