:root {
  --canvas: #f7faf8;
  --paper: #ffffff;
  --ink: #1a2622;
  --muted: #55635e;
  --subtle: #88938f;
  --line: #e2e8e4;
  --line-strong: #c4cec8;
  --sidebar: #1b3a32;
  --sidebar-muted: #a5bbb4;
  --green: #0d7c5a;
  --green-hover: #0a6347;
  --green-soft: #e6f4ee;
  --blue: #2563eb;
  --blue-soft: #eff6ff;
  --amber: #b8730a;
  --amber-soft: #fdf3e3;
  --coral: #d63552;
  --coral-soft: #fef0f2;
  --shadow: 0 2px 8px rgba(27, 58, 50, 0.06);
  --sidebar-width: 232px;
  --topbar-height: 82px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--canvas);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.55;
  letter-spacing: 0;
}

button,
input,
select,
textarea {
  font: inherit;
  letter-spacing: 0;
}

button,
a,
input,
select,
textarea {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(13, 124, 90, 0.25);
  outline-offset: 2px;
}

button {
  color: inherit;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 2px;
  font-size: 22px;
  line-height: 1.25;
  font-weight: 720;
}

h2 {
  margin-bottom: 0;
  font-size: 18px;
  line-height: 1.35;
}

h3 {
  margin-bottom: 6px;
  font-size: 15px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 8px;
  left: 8px;
  padding: 9px 12px;
  color: #fff;
  background: var(--blue);
  border-radius: 4px;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.app-shell {
  min-height: 100vh;
}

.sidebar {
  position: fixed;
  z-index: 30;
  inset: 0 auto 0 0;
  display: flex;
  width: var(--sidebar-width);
  flex-direction: column;
  color: #eef5f1;
  background: var(--sidebar);
  border-right: 1px solid #0f2a23;
}

.brand {
  display: flex;
  min-height: var(--topbar-height);
  align-items: center;
  gap: 10px;
  padding: 17px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  place-items: center;
  color: #fff;
  background: var(--coral);
  border-radius: 6px;
  font-size: 18px;
  font-weight: 750;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 15px;
}

.brand small {
  max-width: 145px;
  margin-top: 2px;
  color: var(--sidebar-muted);
  font-size: 11px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav {
  flex: 1;
  padding: 10px;
  overflow-y: auto;
}

.nav-label {
  margin: 14px 10px 5px;
  color: #8ba89f;
  font-size: 11px;
  font-weight: 700;
}

.nav-label:first-child {
  margin-top: 2px;
}

.nav button {
  display: flex;
  width: 100%;
  min-height: 38px;
  align-items: center;
  gap: 10px;
  margin: 2px 0;
  padding: 8px 10px;
  color: #c8dad2;
  background: transparent;
  border: 0;
  border-radius: 5px;
  cursor: pointer;
  text-align: left;
}

.nav button svg {
  width: 17px;
  height: 17px;
  stroke-width: 1.9;
}

.nav button:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.nav button.active {
  color: #fff;
  background: var(--coral);
  box-shadow: inset 3px 0 0 #ffffff;
}

.sidebar-status {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin: 10px;
  padding: 10px;
  color: #eaf0ed;
  background: rgba(8, 30, 24, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 6px;
}

.sidebar-status strong,
.sidebar-status small {
  display: block;
}

.sidebar-status strong {
  font-size: 12px;
}

.sidebar-status small {
  margin-top: 1px;
  color: var(--sidebar-muted);
  font-size: 11px;
}

.status-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 8px;
  margin-top: 5px;
  background: #ffffff;
  border-radius: 50%;
}

.status-dot.warning {
  background: #e8a04a;
}

.main {
  min-height: 100vh;
  margin-left: var(--sidebar-width);
}

.topbar {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  min-height: var(--topbar-height);
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 24px;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--line);
}

.topbar-title {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 10px;
}

.topbar-title > div {
  min-width: 0;
}

.topbar p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.eyebrow,
.section-kicker {
  margin-bottom: 3px;
  color: var(--blue);
  font-size: 11px;
  font-weight: 720;
}

.top-actions,
.toolbar-actions,
.form-actions,
.inline-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.top-actions {
  flex: 0 0 auto;
}

.icon-button,
.button {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 5px;
  cursor: pointer;
  font-weight: 650;
}

.icon-button {
  width: 36px;
  padding: 0;
  color: var(--muted);
  background: var(--paper);
  border-color: var(--line);
}

.icon-button:hover,
.button.secondary:hover {
  color: var(--blue);
  background: var(--blue-soft);
  border-color: #a1c5b1;
}

.button.primary {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
}

.button.primary:hover {
  background: var(--green-hover);
  border-color: var(--green-hover);
  text-decoration: none;
}

.button.secondary {
  color: var(--ink);
  background: var(--paper);
  border-color: var(--line);
}

.button.danger {
  color: var(--coral);
  background: var(--coral-soft);
  border-color: #e8b8b8;
}

.button:disabled,
.icon-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.button svg,
.icon-button svg {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  stroke-width: 2;
}

.menu-button,
.sidebar-close,
.sidebar-scrim {
  display: none;
}

.ai-chip {
  display: flex;
  min-height: 34px;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  color: var(--amber);
  background: var(--amber-soft);
  border: 1px solid #e8c89a;
  border-radius: 5px;
  font-size: 12px;
  font-weight: 650;
}

.ai-chip.ready {
  color: var(--green);
  background: var(--green-soft);
  border-color: #a3c9b5;
}

.ai-chip.limited {
  color: var(--coral);
  background: var(--coral-soft);
  border-color: #e8b8b8;
}

.ai-chip.partial {
  color: var(--blue);
  background: var(--blue-soft);
  border-color: #bcd5c8;
}

.ai-chip svg {
  width: 15px;
  height: 15px;
}

.date-control {
  display: flex;
  min-height: 36px;
  align-items: center;
  gap: 7px;
  padding: 0 8px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 5px;
}

.date-control svg {
  width: 16px;
  color: var(--muted);
}

.date-control input {
  width: 124px;
  padding: 0;
  border: 0;
  background: transparent;
}

.content {
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  padding: 20px 24px 40px;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.panel {
  min-width: 0;
  padding: 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 7px;
  box-shadow: var(--shadow);
}

.metric strong,
.completion-ring,
.timer-readout,
.calendar-number,
.calendar-completion,
.calendar-more,
.task-delay b,
.task-origin,
.deadline-item span,
.deadline-item small,
.countdown-value,
.analysis-row small,
.count-badge,
input[type="date"],
input[type="number"] {
  color: #1a2622;
  font-family: "Times New Roman", "Microsoft YaHei UI", serif;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.metric {
  display: grid;
  min-height: 82px;
  grid-template-columns: 38px 1fr;
  align-items: center;
  gap: 10px;
  padding: 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 7px;
  box-shadow: var(--shadow);
}

.metric:nth-child(odd) {
  border-top: 3px solid var(--blue);
}

.metric:nth-child(even) {
  border-top: 3px solid var(--coral);
}

.metric-icon {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: var(--blue);
  background: var(--blue-soft);
  border-radius: 6px;
}

.metric-icon.blue {
  color: var(--blue);
  background: var(--blue-soft);
}

.metric-icon.amber {
  color: var(--amber);
  background: var(--amber-soft);
}

.metric-icon.coral {
  color: var(--coral);
  background: var(--coral-soft);
}

.metric-icon svg {
  width: 18px;
  height: 18px;
}

.metric strong,
.metric small {
  display: block;
}

.metric strong {
  font-size: 20px;
  line-height: 1.2;
}

.metric small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
}

.dashboard-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 14px;
  align-items: start;
}

.dashboard-aside {
  display: grid;
  gap: 14px;
}

.section-heading,
.section-toolbar,
.dialog-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.section-heading.compact {
  margin-bottom: 12px;
}

.section-heading p,
.section-toolbar p {
  margin-bottom: 2px;
}

.tag,
.count-badge,
.module-chip,
.phase-chip {
  display: inline-flex;
  min-height: 24px;
  align-items: center;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
}

.tag.green,
.module-chip {
  color: var(--green);
  background: var(--green-soft);
}

.tag.blue {
  color: var(--blue);
  background: var(--blue-soft);
}

.tag.amber {
  color: var(--amber);
  background: var(--amber-soft);
}

.tag.coral {
  color: var(--coral);
  background: var(--coral-soft);
}

.count-badge {
  min-width: 28px;
  justify-content: center;
  color: var(--muted);
  background: #eaf0ed;
}

.phase-chip {
  color: #3a5a50;
  background: #eaf0ed;
}

.day-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.day-header h2 {
  font-size: 20px;
}

.day-header p {
  max-width: 760px;
  margin: 5px 0 0;
  color: var(--muted);
}

.completion-ring {
  display: grid;
  width: 56px;
  height: 56px;
  flex: 0 0 56px;
  place-items: center;
  border: 5px solid var(--blue-soft);
  border-top-color: var(--blue);
  border-radius: 50%;
  color: #1a2622;
  font-size: 12px;
  font-weight: 750;
}

.task-list {
  display: grid;
}

.task-row {
  position: relative;
  display: grid;
  grid-template-columns: 122px minmax(0, 1fr) 156px;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.task-row.overdue,
.task-row.rolled-out {
  padding-left: 12px;
  border-left: 3px solid var(--coral);
  background: #fef6f7;
}

.task-row:last-child {
  padding-bottom: 2px;
  border-bottom: 0;
}

.task-time {
  color: var(--muted);
  font-size: 12px;
}

.task-time strong {
  display: block;
  margin-bottom: 4px;
  color: var(--ink);
  font-size: 13px;
}

.task-origin {
  display: block;
  margin-top: 6px;
  color: var(--coral);
  font-size: 11px;
}

.task-main {
  min-width: 0;
}

.task-title-line {
  display: flex;
  align-items: flex-start;
  gap: 9px;
}

.task-title-line input {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  margin: 1px 0 0;
  accent-color: var(--blue);
  cursor: pointer;
}

.task-copy {
  min-width: 0;
}

.task-copy > p {
  margin: 8px 0 0;
  color: #2a3a34;
}

.task-row.done .task-copy > p,
.task-row.done .course-video {
  color: var(--subtle);
  text-decoration: line-through;
  text-decoration-thickness: 1px;
}

.course-assignment {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 10px;
  padding: 9px 10px;
  background: #f0f5f2;
  border-left: 3px solid var(--blue);
  border-radius: 0 5px 5px 0;
}

.course-assignment > div {
  min-width: 0;
}

.course-video,
.course-folder {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-video {
  color: var(--ink);
  font-size: 12px;
  font-weight: 680;
}

.course-folder {
  margin-top: 2px;
  color: var(--muted);
  font-size: 10px;
}

.course-open {
  width: 32px;
  height: 32px;
  min-height: 32px;
  flex: 0 0 32px;
}

.task-actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 7px;
}

.task-delay {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 4px 7px;
  color: var(--coral);
  background: var(--coral-soft);
  border: 1px solid #e8b8b8;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
}

.task-delay svg {
  width: 14px;
  height: 14px;
}

.task-delay b {
  font-size: 13px;
}

.timer-readout {
  display: flex;
  min-height: 34px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  color: var(--ink);
  background: #f0f5f2;
  border: 1px solid var(--line);
  border-radius: 5px;
  font-variant-numeric: tabular-nums;
  font-weight: 720;
}

.timer-readout svg {
  width: 15px;
  color: var(--muted);
}

.task-actions .button {
  min-height: 32px;
  padding: 6px 8px;
  font-size: 12px;
}

.recommendation-list,
.deadline-list,
.plain-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.recommendation-list li,
.deadline-item,
.plain-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.recommendation-list li:last-child,
.deadline-item:last-child,
.plain-list li:last-child {
  border-bottom: 0;
}

.recommendation-list li {
  display: flex;
  gap: 8px;
}

.recommendation-list svg {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  margin-top: 3px;
  color: var(--blue);
}

.rollover-notice {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 760px;
  margin-top: 10px;
  padding: 8px 10px;
  color: #a02535;
  background: var(--coral-soft);
  border-left: 3px solid var(--coral);
  border-radius: 0 4px 4px 0;
  font-size: 12px;
}

.rollover-notice svg {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
}

.rollover-notice b {
  color: #1a2622;
  font-family: "Times New Roman", serif;
  font-size: 14px;
}

.deadline-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 10px;
}

.deadline-item strong {
  font-size: 13px;
}

.deadline-item span {
  grid-row: span 2;
  color: var(--coral);
  font-size: 17px;
  font-weight: 750;
}

.deadline-item small {
  color: var(--muted);
}

label {
  display: block;
  margin: 12px 0 5px;
  color: #3a4a44;
  font-size: 12px;
  font-weight: 650;
}

input,
select,
textarea {
  width: 100%;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 5px;
}

input,
select {
  min-height: 38px;
  padding: 8px 10px;
}

textarea {
  display: block;
  min-height: 76px;
  padding: 10px;
  line-height: 1.65;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: #9ba39e;
}

input:hover,
select:hover,
textarea:hover {
  border-color: #b5c2bb;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--blue);
}

input[type="file"] {
  padding: 6px;
}

.form-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
}

.field-grow {
  min-width: 0;
  flex: 1;
}

.align-end {
  flex: 0 0 auto;
}

.form-actions {
  margin-top: 14px;
}

.form-actions.end {
  justify-content: flex-end;
}

.full-width {
  width: 100%;
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.8fr);
  gap: 14px;
  align-items: start;
}

.review-layout {
  grid-template-columns: minmax(360px, 0.72fr) minmax(0, 1.28fr);
}

.narrow-panel {
  max-width: 430px;
}

.result-panel {
  min-height: 500px;
}

.empty-state {
  display: grid;
  min-height: 280px;
  place-content: center;
  justify-items: center;
  padding: 30px;
  color: var(--muted);
  text-align: center;
}

.empty-state svg {
  width: 34px;
  height: 34px;
  margin-bottom: 12px;
  color: var(--subtle);
}

.empty-state h3 {
  color: var(--ink);
}

.empty-state p {
  max-width: 360px;
  margin: 0;
}

.analysis-bars {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.analysis-row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) 92px;
  align-items: center;
  gap: 10px;
}

.bar-track {
  height: 8px;
  overflow: hidden;
  background: #e5ebe7;
  border-radius: 3px;
}

.bar-fill {
  display: block;
  height: 100%;
  background: var(--blue);
  border-radius: 3px;
}

.bar-fill.warning {
  background: var(--coral);
}

.analysis-row small {
  color: var(--muted);
  text-align: right;
}

.calendar-panel {
  padding: 0;
  overflow: hidden;
}

.calendar-panel .section-toolbar {
  margin: 0;
  padding: 18px 18px 12px;
}

.calendar-legend {
  display: flex;
  gap: 18px;
  padding: 0 18px 12px;
  color: var(--muted);
  font-size: 11px;
}

.calendar-legend span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.legend-dot {
  width: 8px;
  height: 8px;
  background: var(--line-strong);
  border-radius: 50%;
}

.legend-dot.completed {
  background: var(--blue);
}

.legend-dot.selected {
  background: var(--blue);
}

.legend-dot.overdue {
  background: var(--coral);
}

.calendar-scroll {
  overflow-x: auto;
  border-top: 1px solid var(--line);
}

.calendar-weekdays,
.calendar-grid {
  min-width: 920px;
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
}

.calendar-weekdays {
  color: var(--muted);
  background: #eff4f1;
  border-bottom: 1px solid var(--line);
}

.calendar-weekdays span {
  padding: 9px 10px;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
}

.calendar-day {
  min-height: 144px;
  padding: 9px;
  background: var(--paper);
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  text-align: left;
  overflow: hidden;
}

.calendar-day:nth-child(7n) {
  border-right: 0;
}

.calendar-day:hover {
  background: #f1f6f3;
}

.calendar-day.outside {
  color: #88938f;
  background: #f7faf8;
}

.calendar-day.selected {
  box-shadow: inset 0 0 0 2px var(--blue);
}

.calendar-day.today .calendar-number {
  color: #fff;
  background: var(--coral);
}

.calendar-day.no-plan {
  cursor: default;
}

.calendar-number {
  display: inline-grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 750;
}

.calendar-phase {
  float: right;
  max-width: 72px;
  color: var(--blue);
  font-size: 9px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.calendar-tasks {
  display: grid;
  gap: 5px;
  margin-top: 8px;
}

.calendar-task {
  display: block;
  padding-left: 7px;
  color: #3a4a44;
  border-left: 2px solid #8fae9e;
  font-size: 10px;
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.calendar-task.done {
  color: var(--subtle);
  border-left-color: var(--blue);
  text-decoration: line-through;
}

.calendar-task.overdue {
  color: #a52537;
  border-left-color: var(--coral);
  font-weight: 700;
}

.calendar-task.postponed {
  color: #b04050;
  border-left-color: var(--coral);
}

.calendar-more {
  display: block;
  color: var(--coral);
  font-size: 10px;
}

.calendar-completion {
  display: block;
  margin-top: 8px;
  color: #1a2622;
  font-size: 9px;
  font-weight: 700;
}

.essay-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 14px;
  align-items: start;
}

.essay-result-panel {
  margin-top: 14px;
}

.segmented-control {
  display: flex;
  gap: 0;
  width: fit-content;
  max-width: 100%;
  margin: 0 0 14px;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
}

.segmented-control legend {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.segmented-control label {
  margin: 0;
  border-right: 1px solid var(--line-strong);
  cursor: pointer;
}

.segmented-control label:last-child {
  border-right: 0;
}

.segmented-control input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.segmented-control span {
  display: block;
  padding: 7px 12px;
  color: var(--muted);
  background: var(--paper);
  font-size: 12px;
}

.segmented-control input:checked + span {
  color: #fff;
  background: var(--blue);
}

.segmented-control input:disabled + span {
  color: var(--subtle);
  background: #eef2ef;
  cursor: not-allowed;
}

.segmented-control input:focus-visible + span {
  outline: 3px solid rgba(13, 124, 90, 0.25);
  outline-offset: -3px;
}

.ai-control-row {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin-bottom: 5px;
}

.ai-control-row .segmented-control {
  margin-bottom: 0;
}

.provider-control input:checked + span {
  background: var(--blue);
}

.provider-control.is-inactive {
  opacity: 0.58;
}

.provider-detail {
  min-height: 20px;
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 12px;
}

.provider-detail strong {
  color: var(--ink);
  font-weight: 700;
}

.provider-detail.error {
  color: var(--coral);
}

.ocr-provider-row {
  align-items: center;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.ocr-provider-row .provider-detail {
  flex: 1 1 260px;
  margin: 0;
}

.ai-provenance {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 7px 12px;
  margin-bottom: 14px;
  padding: 9px 11px;
  color: var(--muted);
  background: #f1f5f2;
  border-left: 3px solid var(--blue);
  font-size: 11px;
}

.ai-provenance strong {
  color: var(--ink);
}

.result-section-title {
  margin-top: 18px;
}

.mistake-provenance {
  display: block;
  margin-top: 5px;
  color: var(--subtle);
  font-size: 10px;
}

.search-field {
  position: relative;
  display: block;
  margin: 0;
}

.search-field svg {
  position: absolute;
  z-index: 1;
  top: 11px;
  left: 10px;
  width: 16px;
  height: 16px;
  color: var(--subtle);
}

.search-field input {
  min-width: 210px;
  padding-left: 32px;
}

.wide-search input {
  width: 320px;
}

.library-list {
  max-height: 660px;
  overflow-y: auto;
  border-top: 1px solid var(--line);
}

.library-item {
  display: block;
  padding: 10px 2px;
  border-bottom: 1px solid var(--line);
}

.library-item:last-child {
  border-bottom: 0;
}

.library-item strong {
  display: block;
  color: var(--ink);
  font-size: 12px;
}

.library-item small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 10px;
}

.ai-progress {
  min-height: 0;
  margin-top: 12px;
}

.ai-progress:not(:empty) {
  padding: 10px 12px;
  color: var(--blue);
  background: var(--blue-soft);
  border-left: 3px solid var(--blue);
}

.ai-progress.error:not(:empty) {
  color: var(--coral);
  background: var(--coral-soft);
  border-left-color: var(--coral);
}

.score-summary {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 18px;
  align-items: center;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.score-number {
  display: grid;
  width: 104px;
  height: 104px;
  place-items: center;
  color: #1a2622;
  background: var(--blue-soft);
  border: 1px solid #a3c9b5;
  border-radius: 50%;
  font-size: 31px;
  font-family: "Times New Roman", "Microsoft YaHei UI", serif;
  font-weight: 760;
}

.score-number small {
  display: block;
  margin-top: -20px;
  color: var(--muted);
  font-size: 10px;
}

.dimension-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.dimension {
  padding: 11px;
  background: #f2f6f3;
  border: 1px solid var(--line);
  border-radius: 5px;
}

.dimension-head {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 7px;
  font-size: 12px;
  font-weight: 700;
}

.dimension p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.feedback-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.feedback-columns section {
  padding-top: 10px;
  border-top: 3px solid var(--line);
}

.feedback-columns section:nth-child(1) {
  border-color: var(--green);
}

.feedback-columns section:nth-child(2) {
  border-color: var(--coral);
}

.feedback-columns section:nth-child(3) {
  border-color: var(--blue);
}

.feedback-columns ul {
  margin: 0;
  padding-left: 18px;
}

.feedback-columns li {
  margin: 6px 0;
}

.revised-answer {
  margin-top: 18px;
  padding: 14px;
  background: #f2f6f3;
  border-left: 3px solid var(--blue);
  white-space: pre-wrap;
}

.source-list {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.source-item {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 5px;
}

.source-item strong,
.source-item small {
  display: block;
}

.source-item small {
  margin-top: 4px;
  color: var(--muted);
}

.upload-zone {
  display: grid;
  min-height: 185px;
  place-content: center;
  justify-items: center;
  margin: 0;
  padding: 18px;
  color: var(--muted);
  background: #f2f6f3;
  border: 1px dashed #8fae9e;
  border-radius: 7px;
  cursor: pointer;
  text-align: center;
}

.upload-zone:hover,
.upload-zone.dragover {
  color: var(--blue);
  background: var(--blue-soft);
  border-color: var(--blue);
}

.upload-zone input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.upload-zone strong,
.upload-zone small {
  display: block;
}

.upload-zone small {
  margin-top: 4px;
  font-weight: 400;
}

.upload-icon {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  margin-bottom: 8px;
  color: var(--green);
  background: var(--green-soft);
  border-radius: 6px;
}

.upload-icon svg {
  width: 22px;
  height: 22px;
}

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

.image-preview img {
  display: block;
  width: 100%;
  max-height: 320px;
  object-fit: contain;
  background: #f0f4f1;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.mistake-stack {
  display: grid;
  gap: 10px;
}

.mistake-item {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.mistake-item:last-child {
  border-bottom: 0;
}

.mistake-content {
  min-width: 0;
}

.mistake-content h3 {
  margin-top: 7px;
  overflow-wrap: anywhere;
}

.mistake-item img {
  width: 92px;
  height: 92px;
  object-fit: cover;
  background: #f0f4f1;
  border-radius: 5px;
}

.mistake-item p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 11px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.mistake-item .mistake-reason {
  padding: 7px 9px;
  color: #a02535;
  background: var(--amber-soft);
  border-left: 3px solid var(--amber);
  border-radius: 0 4px 4px 0;
  line-height: 1.55;
}

.countdown-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.countdown-item {
  padding: 17px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 4px solid var(--blue);
  border-radius: 7px;
  box-shadow: var(--shadow);
}

.countdown-item:nth-child(2) {
  border-top-color: var(--blue);
}

.countdown-item:nth-child(3) {
  border-top-color: var(--coral);
}

.countdown-value {
  margin: 12px 0 8px;
  font-size: 28px;
  font-weight: 760;
}

.countdown-value small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.countdown-item p {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 11px;
}

.exam-notice-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 6px;
  padding: 4px 10px;
  border-radius: 5px;
  background: #ebf5ff;
  color: var(--blue);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s;
}

.exam-notice-link:hover {
  background: #d6e9fd;
}
.countdown-item .date-note {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin: 2px 0 6px;
  padding: 3px 8px;
  border-radius: 4px;
  background: #fff8e1;
  color: #8d6e00;
  font-size: 11px;
  font-weight: 500;
}
.countdown-item .date-note i {
  width: 13px;
  height: 13px;
  color: #f0a000;
}

.exam-notice-link i {
  width: 14px;
  height: 14px;
}

.exam-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.exam-links .exam-notice-link {
  margin-top: 0;
}

.exam-notice-link.official-article {
  background: var(--green-soft);
  color: var(--green);
}

.exam-notice-link.official-article:hover {
  background: #d4ede0;
}

.exam-notice-link.agency-article {
  background: var(--amber-soft);
  color: var(--amber);
}

.exam-notice-link.agency-article:hover {
  background: #f5e6c8;
}

.exam-notice-link.portal-link {
  background: #f0f5f2;
  color: var(--subtle);
  font-weight: 500;
}

.exam-notice-link.portal-link:hover {
  background: #e5ebe7;
}

.exam-editor {
  max-width: 1050px;
}

.dense-form-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0 12px;
}

.grid-span {
  grid-column: 1 / -1;
}

.idiom-controls {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) 170px 150px;
  align-items: end;
  gap: 10px;
  margin: 4px 0 12px;
  padding: 10px;
  background: #f0f5f2;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.idiom-controls .search-field,
.idiom-controls .search-field input {
  width: 100%;
}

.compact-field {
  display: grid;
  gap: 4px;
  margin: 0;
}

.compact-field > span {
  color: var(--muted);
  font-size: 10px;
  font-weight: 650;
}

.compact-field select {
  min-height: 36px;
  margin: 0;
  padding: 6px 28px 6px 9px;
  background-color: #fff;
}

#idiom-recall-toggle.active {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
}

.idiom-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 18px;
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 11px;
}

.idiom-stats strong {
  color: var(--ink);
  font-size: 12px;
}

.idiom-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.idiom-item {
  min-width: 0;
  padding: 13px 14px 14px;
  background: #fff;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.idiom-item.distinction {
  box-shadow: inset 3px 0 0 var(--coral);
}

.idiom-item-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.idiom-title {
  display: flex;
  min-width: 0;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.idiom-word {
  min-width: 0;
  color: #1a2622;
  overflow-wrap: anywhere;
  font-family: "STKaiti", "KaiTi", serif;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.35;
}

.idiom-item.distinction .idiom-word {
  font-family: inherit;
  font-size: 15px;
  font-weight: 750;
}

.idiom-item p {
  margin: 7px 0 0;
  color: #3a4a44;
  overflow-wrap: anywhere;
  font-size: 12px;
  line-height: 1.7;
}

.idiom-item p.idiom-meta {
  margin-top: 5px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.45;
}

.idiom-answer strong {
  display: inline-block;
  margin-right: 6px;
  color: var(--green);
  font-size: 10px;
}

.idiom-item p.example {
  padding-top: 6px;
  color: var(--muted);
  border-top: 1px dashed var(--line);
}

.idiom-reveal {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  padding: 6px 9px;
  color: var(--blue);
  background: var(--blue-soft);
  border: 1px solid #a3c9b5;
  border-radius: 5px;
  cursor: pointer;
  font-size: 11px;
  font-weight: 700;
}

.idiom-reveal svg {
  width: 14px;
  height: 14px;
}

.idiom-footer {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 11px;
}

.status-menu {
  display: flex;
  flex: 0 0 auto;
  gap: 4px;
}

.status-menu button {
  min-height: 26px;
  padding: 3px 7px;
  color: var(--muted);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  cursor: pointer;
  font-size: 10px;
}

.status-menu button.active {
  color: #fff;
  background: var(--green);
  border-color: var(--green);
}

.notice-line {
  margin-bottom: 12px;
  padding: 9px 11px;
  color: var(--amber);
  background: var(--amber-soft);
  border-left: 3px solid var(--amber);
  font-size: 11px;
}

.notice-line:empty {
  display: none;
}

.course-strategy-list {
  border-top: 1px solid var(--line);
}

.strategy-row {
  display: grid;
  grid-template-columns: 126px minmax(0, 1fr) minmax(220px, 280px);
  gap: 18px;
  align-items: start;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
}

.strategy-row > header {
  display: flex;
  align-items: center;
  gap: 9px;
}

.strategy-row > header strong,
.strategy-row > header small {
  display: block;
}

.strategy-row > header small,
.strategy-label {
  color: var(--muted);
  font-size: 11px;
}

.strategy-main > p {
  margin: 4px 0 8px;
  color: var(--ink);
  line-height: 1.65;
}

.strategy-main details summary {
  color: var(--blue);
  cursor: pointer;
  font-size: 12px;
}

.strategy-detail {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 10px;
  padding-left: 11px;
  border-left: 2px solid var(--green);
}

.strategy-detail b {
  font-size: 11px;
}

.strategy-detail p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.65;
}

.strategy-links {
  display: grid;
  gap: 8px;
}

.strategy-links > div {
  display: grid;
  gap: 5px;
}

.strategy-links a {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 7px;
  color: var(--blue);
  font-size: 11px;
  line-height: 1.35;
  text-decoration: none;
}

.strategy-links a:hover {
  text-decoration: underline;
}

.strategy-links svg {
  width: 14px;
  height: 14px;
  flex: 0 0 14px;
}

.subsection-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-top: 24px;
  padding: 0 4px 9px;
}

.subsection-heading span {
  font-weight: 800;
}

.subsection-heading small {
  color: var(--muted);
  font-size: 11px;
}

.course-table {
  border-top: 1px solid var(--line);
}

.course-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) 90px 96px;
  align-items: center;
  gap: 12px;
  padding: 11px 4px;
  border-bottom: 1px solid var(--line);
}

.teacher-cell {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
}

.teacher-avatar {
  display: grid;
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  place-items: center;
  color: var(--green);
  background: var(--green-soft);
  border-radius: 5px;
}

.course-name {
  min-width: 0;
}

.course-name strong,
.course-name small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-name small,
.course-count {
  color: var(--muted);
  font-size: 11px;
}

.course-row details {
  grid-column: 2 / -1;
}

.course-row summary {
  color: var(--blue);
  cursor: pointer;
  font-size: 11px;
}

.folder-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  margin-top: 8px;
}

.folder-link {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 7px 8px;
  color: #3a4a44;
  background: #f2f6f3;
  border: 1px solid var(--line);
  border-radius: 4px;
  cursor: pointer;
  text-align: left;
}

.folder-link span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.folder-link small {
  flex: 0 0 auto;
  color: var(--muted);
}

.resource-links-panel {
  margin-top: 14px;
}

.resource-link-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.resource-link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 10px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 5px;
}

.resource-link:hover {
  background: #f2f6f3;
  text-decoration: none;
}

.resource-link svg {
  width: 17px;
  color: var(--blue);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 14px;
  align-items: start;
}

.featured-article {
  padding: 16px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.featured-article h3 {
  max-width: 780px;
  font-size: 20px;
}

.featured-article p {
  color: var(--muted);
}

.article-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 18px;
}

.article-item {
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.article-item a {
  display: block;
  color: var(--ink);
  font-weight: 650;
}

.article-item small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
}

.progress-dialog {
  width: min(520px, calc(100% - 28px));
  padding: 0;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  box-shadow: 0 18px 50px rgba(27, 58, 50, 0.2);
}

.progress-dialog::backdrop {
  background: rgba(15, 35, 28, 0.5);
}

.progress-dialog form {
  padding: 18px;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.check-row input {
  width: 18px;
  min-height: 18px;
  margin: 0;
  accent-color: var(--blue);
}

.toast {
  position: fixed;
  z-index: 100;
  right: 18px;
  bottom: 18px;
  max-width: 380px;
  padding: 11px 14px;
  color: #fff;
  background: #1b3a32;
  border-radius: 5px;
  box-shadow: 0 8px 28px rgba(27, 58, 50, 0.2);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast.error {
  background: #a52537;
}

.loading-spin {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 1180px) {
  .metric-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .dashboard-layout,
  .essay-layout,
  .article-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .dashboard-aside {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .library-list {
    max-height: 420px;
  }

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

@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 180ms ease;
  }

  body.sidebar-open .sidebar {
    transform: translateX(0);
  }

  .sidebar-scrim {
    position: fixed;
    z-index: 25;
    inset: 0;
    width: 100%;
    height: 100%;
    padding: 0;
    background: rgba(15, 35, 28, 0.48);
    border: 0;
  }

  body.sidebar-open .sidebar-scrim {
    display: block;
  }

  .sidebar-close,
  .menu-button {
    display: inline-flex;
  }

  .sidebar-close {
    margin-left: auto;
    color: #c8dad2;
    background: transparent;
    border-color: rgba(255, 255, 255, 0.24);
  }

  .main {
    margin-left: 0;
  }

  .split-layout,
  .review-layout {
    grid-template-columns: 1fr;
  }

  .narrow-panel {
    max-width: none;
  }

  .task-row {
    grid-template-columns: 104px minmax(0, 1fr);
  }

  .task-actions {
    grid-column: 2;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .task-actions > * {
    flex: 1 1 140px;
  }

  .dense-form-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .idiom-controls {
    grid-template-columns: minmax(220px, 1fr) 150px 140px;
  }
}

@media (max-width: 640px) {
  :root {
    --topbar-height: 70px;
  }

  .topbar {
    min-height: var(--topbar-height);
    padding: 9px 12px;
  }

  .topbar h1 {
    font-size: 18px;
  }

  .topbar p,
  .eyebrow {
    display: none;
  }

  .ai-chip span,
  .date-control svg {
    display: none;
  }

  .ai-chip {
    width: 34px;
    padding: 0;
    justify-content: center;
  }

  .date-control {
    padding: 0 5px;
  }

  .date-control input {
    width: 112px;
    font-size: 12px;
  }

  .content {
    padding: 12px 10px 28px;
  }

  .panel {
    padding: 14px;
  }

  .metric-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .metric {
    min-height: 72px;
    grid-template-columns: 30px 1fr;
    padding: 10px;
  }

  .metric-icon {
    width: 30px;
    height: 30px;
  }

  .metric strong {
    font-size: 17px;
  }

  .dashboard-aside,
  .dimension-grid,
  .feedback-columns,
  .idiom-list,
  .article-list,
  .folder-list,
  .resource-link-grid {
    grid-template-columns: 1fr;
  }

  .task-row {
    grid-template-columns: 1fr;
    gap: 9px;
  }

  .task-time {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .task-time strong {
    margin: 0;
  }

  .task-actions {
    grid-column: 1;
  }

  .course-folder {
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .section-toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .toolbar-actions {
    flex-wrap: wrap;
  }

  .toolbar-actions .search-field,
  .toolbar-actions .search-field input,
  .wide-search,
  .wide-search input {
    width: 100%;
  }

  .form-row {
    align-items: stretch;
    flex-direction: column;
  }

  .align-end {
    width: 100%;
  }

  .segmented-control {
    width: 100%;
  }

  .segmented-control label {
    flex: 1;
    text-align: center;
  }

  .segmented-control span {
    padding: 7px 5px;
    white-space: normal;
  }

  .ai-control-row {
    align-items: stretch;
    flex-direction: column;
  }

  .ai-control-row .segmented-control {
    width: 100%;
  }

  .ocr-provider-row .provider-detail {
    flex-basis: auto;
  }

  .score-summary {
    grid-template-columns: 86px 1fr;
  }

  .score-number {
    width: 80px;
    height: 80px;
    font-size: 25px;
  }

  .mistake-item {
    grid-template-columns: 70px minmax(0, 1fr);
  }

  .mistake-item img {
    width: 70px;
    height: 70px;
  }

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

  .idiom-controls {
    grid-template-columns: 1fr;
  }

  .idiom-item-head {
    align-items: stretch;
    flex-direction: column;
  }

  .status-menu {
    width: 100%;
  }

  .status-menu button {
    flex: 1;
  }

  .strategy-row,
  .strategy-detail {
    grid-template-columns: 1fr;
  }

  .strategy-row {
    gap: 11px;
  }

  .course-row {
    grid-template-columns: 100px minmax(0, 1fr) 70px;
  }

  .course-row > .button {
    grid-column: 1 / -1;
    width: 100%;
  }

  .course-row details {
    grid-column: 1 / -1;
  }

  .calendar-panel .section-toolbar {
    flex-direction: row;
  }

  .calendar-panel .toolbar-actions {
    flex-wrap: nowrap;
  }

  .calendar-panel .button {
    padding: 7px;
    font-size: 11px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== 视觉增强层（仅覆盖外观，不改动功能与 DOM 结构） ===== */
:root {
  --radius: 16px;
  --radius-sm: 11px;
  --radius-pill: 999px;
  --grad-sidebar: linear-gradient(180deg, #20473d 0%, #152e28 100%);
  --grad-primary: linear-gradient(135deg, #2f6df6 0%, #0d7c5a 100%);
  --grad-coral: linear-gradient(135deg, #e5455f 0%, #c62f49 100%);
  --grad-blue: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  --shadow-card: 0 8px 22px rgba(16, 42, 35, 0.07);
  --shadow-lg: 0 14px 32px rgba(16, 42, 35, 0.12);
  --focus-ring: 0 0 0 3px rgba(37, 99, 235, 0.16);
}

html { scroll-behavior: smooth; }

body {
  background: linear-gradient(180deg, #e9f1ed 0%, #f5f9f7 220px, #f5f9f7 100%);
}

.sidebar {
  background: var(--grad-sidebar);
  border-right: 1px solid #0c241d;
  box-shadow: 4px 0 22px rgba(11, 32, 26, 0.22);
}

.brand-mark {
  background: var(--grad-coral);
  border-radius: 9px;
  box-shadow: 0 4px 12px rgba(198, 47, 73, 0.4);
}

.sidebar-status { border-radius: 10px; }

.nav button {
  border-radius: 9px;
  transition: background 0.16s ease, color 0.16s ease, transform 0.16s ease;
}
.nav button:hover { transform: translateX(2px); }
.nav button.active {
  background: var(--grad-coral);
  box-shadow: 0 6px 16px rgba(198, 47, 73, 0.35), inset 3px 0 0 #fff;
}

.topbar {
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(16, 42, 35, 0.04), 0 6px 20px rgba(16, 42, 35, 0.05);
}

.panel {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease;
}
.panel:hover { box-shadow: var(--shadow-lg); }

.metric,
.countdown-item {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.metric:hover,
.countdown-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}
.metric { border-top: 4px solid var(--blue); }
.metric:nth-child(odd) { border-top: 4px solid var(--blue); }
.metric:nth-child(even) { border-top: 4px solid var(--coral); }
.metric-icon { border-radius: 10px; }

.button,
.icon-button {
  border-radius: var(--radius-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.button.primary {
  background: var(--grad-primary);
  border-color: transparent;
  box-shadow: 0 6px 16px rgba(47, 109, 246, 0.28);
}
.button.primary:hover {
  background: var(--grad-primary);
  filter: brightness(1.04);
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(47, 109, 246, 0.34);
}
.button.secondary:hover { transform: translateY(-1px); }
.icon-button:hover { transform: translateY(-1px); }

.ai-chip {
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-card);
}
.date-control { border-radius: var(--radius-pill); }

.tag,
.count-badge,
.module-chip,
.phase-chip {
  border-radius: 7px;
}
.tag.green,
.module-chip { box-shadow: inset 0 0 0 1px rgba(13, 124, 90, 0.12); }

.completion-ring {
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(16, 42, 35, 0.08);
}
.score-number {
  border-radius: 50%;
  box-shadow: 0 8px 20px rgba(47, 109, 246, 0.18);
}

.segmented-control { border-radius: var(--radius-pill); overflow: hidden; }
.segmented-control input:checked + span { background: var(--grad-blue); }

.calendar-day { transition: background 0.15s ease, box-shadow 0.15s ease; }
.calendar-day:hover { background: #eef4f1; }
.calendar-day.selected {
  box-shadow: inset 0 0 0 2px var(--blue);
  background: #f3f9ff;
}
.calendar-day.today .calendar-number {
  background: var(--grad-coral);
  box-shadow: 0 3px 8px rgba(198, 47, 73, 0.35);
}

.task-row {
  border-radius: 6px;
  transition: background 0.15s ease;
}
.task-row:hover { background: #fbfdfc; }

.resource-link,
.folder-link,
.exam-notice-link {
  border-radius: var(--radius-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.resource-link:hover,
.folder-link:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
  text-decoration: none;
}

.upload-zone { border-radius: var(--radius); }
.idiom-item {
  border-radius: 8px;
  transition: box-shadow 0.18s ease, transform 0.18s ease;
}
.idiom-item:hover {
  box-shadow: 0 6px 18px rgba(16, 42, 35, 0.07);
  transform: translateY(-2px);
}
.idiom-reveal { border-radius: var(--radius-sm); }

input:focus,
select:focus,
textarea:focus { box-shadow: var(--focus-ring); }

.progress-dialog { border-radius: var(--radius); }
.toast { border-radius: 12px; }

h1 { letter-spacing: 0.2px; }