:root {
  color-scheme: light;
  --ink: #1d2524;
  --muted: #66706e;
  --paper: #f5f6f3;
  --surface: #ffffff;
  --line: #dfe3df;
  --sidebar: #202725;
  --sidebar-muted: #aeb8b5;
  --accent: #16765f;
  --accent-strong: #0f5e4b;
  --work: #b4523d;
  --work-soft: #f7e9e5;
  --software: #2e68a0;
  --software-soft: #e8f0f8;
  --english: #99701b;
  --english-soft: #f7efd9;
  --danger: #b43737;
  --shadow: 0 18px 48px rgba(31, 43, 39, 0.14);
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
  color: var(--ink);
}

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

button {
  cursor: pointer;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(22, 118, 95, 0.25);
  outline-offset: 2px;
}

.app-shell {
  display: grid;
  grid-template-columns: 224px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 36px;
  padding: 28px 18px 22px;
  background: var(--sidebar);
  color: var(--surface);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.brand-mark,
.lane-icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border-radius: 7px;
}

.brand-mark {
  background: #d8e75d;
  color: var(--sidebar);
}

.brand-mark svg,
.lane-icon svg,
button svg,
.nav-item svg {
  width: 19px;
  height: 19px;
  stroke-width: 1.8;
}

.icon-fallback {
  font-size: 0.75rem;
  font-weight: 700;
}

.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;
}

.icons-ready .icon-fallback {
  display: none;
}

.brand strong,
.brand small {
  display: block;
  letter-spacing: 0;
}

.brand strong {
  font-size: 1.06rem;
  font-weight: 700;
}

.brand small {
  margin-top: 2px;
  color: var(--sidebar-muted);
  font-size: 0.72rem;
}

.main-nav {
  display: grid;
  gap: 5px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 11px;
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--sidebar-muted);
  text-align: left;
}

.nav-item:hover,
.nav-item.is-active {
  background: rgba(255, 255, 255, 0.09);
  color: var(--surface);
}

.nav-item.is-active {
  box-shadow: inset 3px 0 #d8e75d;
}

.sidebar-status {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  color: var(--sidebar-muted);
  font-size: 0.75rem;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #78c98c;
  box-shadow: 0 0 0 4px rgba(120, 201, 140, 0.12);
}

.main-content {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 38px 46px 64px;
}

.topbar,
.section-heading,
.dialog-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.topbar {
  margin-bottom: 34px;
}

.eyebrow,
.section-kicker,
.lane-heading p {
  margin: 0 0 5px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: 2rem;
  line-height: 1.2;
}

h2 {
  font-size: 1.18rem;
  line-height: 1.35;
}

h3 {
  font-size: 1rem;
}

.primary-button,
.secondary-button,
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  border-radius: 6px;
}

.primary-button {
  padding: 0 16px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
}

.primary-button:hover {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
}

.secondary-button {
  padding: 0 16px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
}

.icon-button {
  width: 38px;
  min-height: 38px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
}

.icon-button:hover {
  background: var(--paper);
  color: var(--ink);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
}

.summary-item {
  min-width: 0;
  padding: 22px 24px;
}

.summary-item + .summary-item {
  border-left: 1px solid var(--line);
}

.summary-item > span,
.summary-item small {
  display: block;
  color: var(--muted);
}

.summary-item > span {
  margin-bottom: 8px;
  font-size: 0.82rem;
  font-weight: 700;
}

.summary-item strong {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.summary-item strong em {
  font-size: 0.9rem;
  font-style: normal;
  font-weight: 600;
}

.summary-item small {
  margin-top: 9px;
  font-size: 0.72rem;
}

.progress-section,
.task-section {
  padding-top: 30px;
}

.compact-heading {
  align-items: flex-end;
}

.progress-value {
  color: var(--accent);
  font-size: 1.2rem;
  font-variant-numeric: tabular-nums;
}

.progress-track {
  height: 8px;
  margin-top: 16px;
  overflow: hidden;
  border-radius: 4px;
  background: #dce2de;
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
  transition: width 220ms ease;
}

.task-section {
  margin-top: 30px;
  border-top: 1px solid var(--line);
}

.task-heading {
  align-items: flex-end;
}

.segmented-control {
  display: flex;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
}

.segmented-control button {
  min-height: 34px;
  padding: 0 12px;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  font-size: 0.8rem;
}

.segmented-control button.is-selected {
  background: var(--sidebar);
  color: var(--surface);
}

.task-list,
.plan-list,
.record-list {
  display: grid;
}

.task-list {
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

.task-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 14px;
  min-height: 74px;
  padding: 13px 4px;
  border-bottom: 1px solid var(--line);
}

.task-check {
  width: 21px;
  height: 21px;
  accent-color: var(--accent);
}

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

.task-copy strong {
  display: block;
  font-size: 0.92rem;
}

.task-copy p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 0.76rem;
}

.task-item.is-completed .task-copy strong {
  color: var(--muted);
  text-decoration: line-through;
}

.category-tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 8px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 700;
}

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

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

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

.task-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.75rem;
  white-space: nowrap;
}

.task-actions {
  display: flex;
  align-items: center;
}

.task-actions .icon-button {
  width: 34px;
  min-height: 34px;
}

.task-actions .icon-fallback,
.record-delete .icon-fallback {
  font-size: 0.68rem;
}

.task-actions .delete-button:hover,
.record-delete:hover {
  color: var(--danger);
}

.empty-state {
  padding: 38px 12px;
  color: var(--muted);
  text-align: center;
}

.empty-state svg {
  width: 30px;
  height: 30px;
  margin-bottom: 8px;
}

.empty-state p {
  margin: 0;
  font-size: 0.84rem;
}

.page-intro {
  max-width: 680px;
  padding-bottom: 28px;
}

.page-intro > p:last-child {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 42px;
  border-top: 1px solid var(--line);
  padding-top: 30px;
}

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

.software-lane .lane-icon {
  background: var(--software-soft);
  color: var(--software);
}

.english-lane .lane-icon {
  background: var(--english-soft);
  color: var(--english);
}

.lane-heading p {
  margin-bottom: 2px;
}

.plan-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.plan-item time {
  color: var(--muted);
  font-size: 0.72rem;
}

.plan-item strong {
  display: block;
  margin: 4px 0;
  font-size: 0.88rem;
}

.plan-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.55;
}

.records-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.8fr) minmax(0, 1.2fr);
  gap: 54px;
}

.record-editor {
  align-self: start;
  padding-right: 46px;
  border-right: 1px solid var(--line);
}

.record-editor form,
.task-dialog form {
  display: grid;
  gap: 17px;
  margin-top: 24px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid #cfd5d1;
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
}

input,
select {
  min-height: 42px;
  padding: 0 11px;
}

textarea {
  padding: 11px;
  line-height: 1.6;
  resize: vertical;
}

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

.record-editor .primary-button {
  justify-self: start;
}

.record-count {
  color: var(--muted);
  font-size: 0.76rem;
}

.record-list {
  margin-top: 12px;
}

.record-item {
  position: relative;
  padding: 18px 40px 18px 18px;
  border-left: 2px solid var(--line);
}

.record-item::before {
  content: "";
  position: absolute;
  top: 24px;
  left: -5px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.record-item time {
  color: var(--muted);
  font-size: 0.72rem;
}

.record-item h3 {
  margin-top: 5px;
}

.record-item p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.7;
  white-space: pre-wrap;
}

.record-delete {
  position: absolute;
  top: 14px;
  right: 0;
}

.task-dialog {
  width: min(520px, calc(100% - 28px));
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.task-dialog::backdrop {
  background: rgba(17, 24, 22, 0.48);
  backdrop-filter: blur(3px);
}

.task-dialog form {
  margin: 0;
  padding: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.dialog-heading {
  margin-bottom: 4px;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 5px;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 10;
  max-width: calc(100% - 48px);
  padding: 11px 15px;
  border-radius: 6px;
  background: var(--sidebar);
  color: var(--surface);
  font-size: 0.8rem;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: 180ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.ai-view {
  max-width: 920px;
}

.ai-toolbar,
.ai-toolbar-actions,
.composer-footer,
.composer-actions {
  display: flex;
  align-items: center;
}

.ai-toolbar {
  justify-content: space-between;
  gap: 20px;
}

.ai-toolbar-actions {
  gap: 8px;
}

.model-control button {
  min-width: 102px;
}

.model-note {
  margin: 10px 0 18px;
  color: var(--muted);
  font-size: 0.76rem;
}

.chat-panel {
  display: grid;
  grid-template-rows: minmax(340px, 1fr) auto;
  height: min(680px, calc(100vh - 210px));
  min-height: 520px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
}

.chat-messages {
  min-height: 0;
  padding: 24px;
  overflow-y: auto;
}

.chat-welcome {
  display: grid;
  place-items: center;
  min-height: 100%;
  padding: 36px;
  color: var(--muted);
  text-align: center;
}

.chat-welcome > span {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 14px;
  border-radius: 7px;
  background: #e5efe8;
  color: var(--accent);
}

.chat-welcome h3 {
  color: var(--ink);
}

.chat-welcome p {
  max-width: 440px;
  margin: 9px 0 0;
  font-size: 0.82rem;
  line-height: 1.7;
}

.chat-message {
  position: relative;
  max-width: 78%;
  margin-bottom: 18px;
  padding: 13px 42px 14px 15px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #f7f8f6;
}

.chat-message.user {
  margin-left: auto;
  padding-right: 15px;
  border-color: #c8ded7;
  background: #e8f2ee;
}

.chat-message.error {
  max-width: 100%;
  border-color: #ebc5c0;
  background: #fbefed;
  color: var(--danger);
}

.message-label {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 700;
}

.message-content {
  font-size: 0.85rem;
  line-height: 1.7;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.message-copy {
  position: absolute;
  top: 6px;
  right: 5px;
  width: 32px;
  min-height: 32px;
}

.typing-indicator {
  display: flex;
  gap: 5px;
  width: fit-content;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #f7f8f6;
}

.typing-indicator span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--muted);
  animation: typing 900ms infinite alternate;
}

.typing-indicator span:nth-child(2) { animation-delay: 150ms; }
.typing-indicator span:nth-child(3) { animation-delay: 300ms; }

@keyframes typing {
  to { opacity: 0.25; transform: translateY(-2px); }
}

.chat-composer {
  padding: 14px;
  border-top: 1px solid var(--line);
  background: #fafbf9;
}

.chat-composer textarea {
  min-height: 76px;
  max-height: 180px;
  resize: vertical;
}

.composer-footer {
  justify-content: space-between;
  gap: 12px;
  margin-top: 10px;
}

.composer-footer > span {
  color: var(--muted);
  font-size: 0.7rem;
}

.composer-actions {
  gap: 8px;
}

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

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

  .sidebar {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 18px;
    padding: 14px 20px;
  }

  .main-nav {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .nav-item {
    justify-content: center;
  }

  .nav-item.is-active {
    box-shadow: inset 0 -3px #d8e75d;
  }

  .sidebar-status {
    display: none;
  }

  .main-content {
    padding: 30px 28px 56px;
  }

  .records-layout {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .record-editor {
    padding-right: 0;
    padding-bottom: 36px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .chat-panel {
    height: min(650px, calc(100vh - 230px));
  }
}

@media (max-width: 620px) {
  .sidebar {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 14px;
  }

  .brand {
    justify-content: center;
  }

  .nav-item {
    min-height: 42px;
    padding: 0 8px;
    font-size: 0.78rem;
  }

  .nav-item svg {
    display: none;
  }

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

  .ai-toolbar-actions {
    justify-content: space-between;
  }

  .model-control {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    flex: 1;
  }

  .model-control button {
    flex: 1;
    min-width: 0;
    padding: 0 8px;
  }

  .chat-panel {
    height: calc(100vh - 305px);
    min-height: 500px;
  }

  .chat-messages {
    padding: 15px;
  }

  .chat-message {
    max-width: 92%;
  }

  .composer-footer > span {
    display: none;
  }

  .composer-footer {
    justify-content: flex-end;
  }

  .main-content {
    padding: 24px 17px 48px;
  }

  h1 {
    font-size: 1.65rem;
  }

  .topbar {
    align-items: flex-start;
    margin-bottom: 26px;
  }

  .topbar .primary-button span {
    display: none;
  }

  .topbar .primary-button {
    width: 42px;
    padding: 0;
    flex: 0 0 auto;
  }

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

  .summary-item {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    padding: 16px 18px;
  }

  .summary-item + .summary-item {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .summary-item > span {
    margin: 0;
  }

  .summary-item strong {
    grid-row: 1 / span 2;
    grid-column: 2;
    font-size: 1.55rem;
  }

  .summary-item small {
    margin-top: 4px;
  }

  .task-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .segmented-control {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .segmented-control button {
    padding: 0 6px;
  }

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

  .task-meta {
    grid-column: 2;
    white-space: normal;
  }

  .task-actions {
    grid-row: 1 / span 2;
    grid-column: 3;
    flex-direction: column;
  }

  .plan-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

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

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