:root {
  --bg: #f7f4ee;
  --paper: #fffdfa;
  --paper-soft: #fbf7ee;
  --ink: #27231d;
  --muted: #7a7165;
  --line: #e4dbcf;
  --accent: #3f6f5f;
  --accent-dark: #285447;
  --accent-light: #92b28a;
  --yellow: #fff4c8;
  --shadow: 0 18px 45px rgba(72, 57, 38, 0.12);
  --sidebar-bg: #f0eadf;
  --input-bg: #fff;
  --secondary-bg: #eee7dc;
  --secondary-hover-bg: #e1d7c9;
  --question-bg: #eef4ff;
  --todo-bg: #edf7ef;
  --active-note-bg: #edf7ef;
  --overdue-bg: #fff7e6;
  --metrics-bg: #eee7dc;
}

[data-theme="dark"] {
  --bg: #1a1814;
  --paper: #242019;
  --paper-soft: #2a2520;
  --ink: #e8e0d4;
  --muted: #9a8e80;
  --line: #3a342c;
  --accent: #5a9e85;
  --accent-dark: #72b89e;
  --accent-light: #3e6e58;
  --yellow: #3a3020;
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.35);
  --sidebar-bg: #1e1b16;
  --input-bg: #2a2520;
  --secondary-bg: #342e27;
  --secondary-hover-bg: #3e3730;
  --question-bg: #1e2430;
  --todo-bg: #1e2a20;
  --active-note-bg: #1e2a20;
  --overdue-bg: #302818;
  --metrics-bg: #342e27;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  cursor: pointer;
  padding: 10px 14px;
}

button:hover {
  background: var(--accent-dark);
}

.secondary,
.ghost {
  background: var(--secondary-bg);
  color: var(--ink);
}

.secondary:hover,
.ghost:hover {
  background: var(--secondary-hover-bg);
}

.small {
  padding: 4px 9px;
}

.wide {
  width: 100%;
}

.shell {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  border-right: 1px solid var(--line);
  background: var(--sidebar-bg);
  padding: 22px;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 24px;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
}

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

.brand small,
.topbar small,
.section-title small,
.course-item small {
  color: var(--muted);
}

.nav {
  display: grid;
  gap: 8px;
  margin-bottom: 28px;
}

.nav button,
.course-item {
  width: 100%;
  text-align: left;
  background: transparent;
  color: var(--ink);
  padding: 11px 12px;
}

.nav button.active,
.course-item.active {
  background: var(--paper);
  box-shadow: inset 3px 0 0 var(--accent);
}

.course-box {
  display: grid;
  gap: 12px;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  font-weight: 750;
}

.course-list,
.timeline,
.todo-list {
  display: grid;
  gap: 10px;
}

.course-item {
  display: grid;
  gap: 4px;
}

.main {
  min-width: 0;
  padding: 24px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.topbar h1 {
  margin: 2px 0 0;
  font-size: 28px;
}

.status {
  color: var(--muted);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
}

.quick-layout,
.notes-layout,
.today-layout {
  display: grid;
  grid-template-columns: minmax(360px, 1.4fr) minmax(300px, 0.9fr) minmax(260px, 0.7fr);
  gap: 18px;
  align-items: start;
}

.notes-layout {
  grid-template-columns: minmax(420px, 1fr) 320px;
}

.today-layout {
  grid-template-columns: minmax(360px, 520px) minmax(280px, 1fr);
}

.quick-card,
.panel,
.document,
.today-card,
.course-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.quick-card,
.panel,
.today-card,
.course-card {
  padding: 18px;
}

.eyebrow {
  color: var(--muted);
  margin: 0 0 12px;
}

.quick-input,
.todo-form,
.inline-create,
.course-create {
  display: grid;
  gap: 10px;
}

.quick-input textarea,
.todo-form input,
.inline-create input,
.course-create input,
.note-title,
.note-body {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--ink);
  padding: 12px;
  outline: none;
}

.quick-input textarea:focus,
.todo-form input:focus,
.note-title:focus,
.note-body:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(63, 111, 95, 0.12);
}

.quick-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.button-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.hint {
  color: var(--muted);
  font-size: 13px;
  margin: 10px 0 0;
}

.quick-item {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-soft);
  padding: 10px;
}

.quick-item time {
  color: var(--muted);
  font-size: 13px;
}

.quick-item span {
  font-weight: 750;
}

.quick-state {
  display: inline-block;
  margin-left: 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.quick-item.important {
  background: var(--yellow);
}

.quick-item.question {
  background: var(--question-bg);
}

.quick-item.todo {
  background: var(--todo-bg);
}

.document {
  min-height: calc(100vh - 132px);
  padding: 26px;
}

.note-title {
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  font-size: 28px;
  font-weight: 780;
  padding: 0 0 16px;
}

.note-body {
  min-height: calc(100vh - 250px);
  margin-top: 18px;
  border: 0;
  resize: vertical;
  line-height: 1.75;
}

.todo-form {
  grid-template-columns: minmax(0, 1fr) 44px;
  margin-bottom: 12px;
}

.todo-form button,
.inline-create button {
  padding: 0;
}

.inline-create {
  grid-template-columns: minmax(0, 1fr) 42px;
  margin-bottom: 12px;
}

.course-create {
  grid-template-columns: minmax(180px, 1fr) minmax(220px, 1fr) auto;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

.todo-item {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) 28px;
  gap: 10px;
  align-items: center;
  padding: 10px;
  border-radius: 8px;
  background: var(--paper-soft);
  border: 1px solid var(--line);
}

.todo-item.done span {
  color: var(--muted);
  text-decoration: line-through;
}

.todo-summary {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
  margin: 12px 0;
}

.todo-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.overdue-box {
  border-top: 1px solid var(--line);
  margin-top: 14px;
  padding-top: 14px;
}

.overdue-list {
  display: grid;
  gap: 8px;
  margin-bottom: 10px;
}

.overdue-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--overdue-bg);
  padding: 9px 10px;
}

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

.side-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-bottom: 14px;
}

.note-list {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}

.note-tab {
  display: grid;
  gap: 4px;
  width: 100%;
  background: var(--paper-soft);
  color: var(--ink);
  text-align: left;
}

.note-tab.active {
  background: var(--active-note-bg);
  box-shadow: inset 3px 0 0 var(--accent);
}

.note-tab small {
  color: var(--muted);
}

.check,
.delete {
  width: 28px;
  height: 28px;
  padding: 0;
  border-radius: 50%;
}

.check {
  background: var(--input-bg);
  color: var(--accent);
  border: 1px solid var(--accent);
}

.delete {
  background: transparent;
  color: var(--muted);
}

.empty {
  color: var(--muted);
  margin: 0;
}

.page-empty {
  padding: 28px;
}

.help-panel h2 {
  margin-top: 0;
}

.mini-page {
  max-width: 360px;
}

body[data-view="mini"] .shell {
  grid-template-columns: 1fr;
}

body[data-view="mini"] .sidebar,
body[data-view="mini"] .topbar {
  display: none;
}

body[data-view="mini"] .main {
  padding: 10px;
}

body[data-view="mini"] .today-card {
  box-shadow: none;
}

.courses-page {
  display: grid;
  gap: 16px;
}

.search-page {
  display: grid;
  gap: 16px;
  max-width: 820px;
}

.search-box {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

.search-box input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--ink);
  padding: 12px;
  outline: none;
}

.search-results {
  display: grid;
  gap: 10px;
}

.search-result {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  background: var(--paper);
  border: 1px solid var(--line);
  color: var(--ink);
  text-align: left;
}

.search-result span {
  color: var(--accent);
  font-weight: 750;
}

.search-result small {
  color: var(--muted);
}

.data-tools {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

.data-tools p {
  color: var(--muted);
  margin: 4px 0 0;
}

.sync-key-form {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) auto auto;
  gap: 10px;
  align-items: center;
}

.sync-key-form input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--ink);
  padding: 10px;
  outline: none;
}

.sync-key-form input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(63, 111, 95, 0.12);
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.course-card {
  display: grid;
  gap: 12px;
}

.course-card label {
  display: grid;
  gap: 6px;
}

.course-card label span {
  color: var(--muted);
  font-size: 13px;
}

.course-card input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--ink);
  padding: 10px;
  outline: none;
}

.course-card input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(63, 111, 95, 0.12);
}

.metrics {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 14px 0;
}

.metrics span {
  background: var(--metrics-bg);
  border-radius: 999px;
  padding: 6px 10px;
  color: var(--muted);
}

.card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

[data-theme="dark"] input:focus,
[data-theme="dark"] textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(90, 158, 133, 0.2);
}

.tag-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.tag-chip {
  background: var(--paper-soft);
  border: 1px solid var(--line);
  color: var(--accent);
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 12px;
  cursor: pointer;
}

.tag-chip:hover,
.tag-chip.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.tag-text {
  color: var(--accent);
  font-weight: 600;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.markdown-body {
  line-height: 1.75;
  min-height: calc(100vh - 250px);
  margin-top: 18px;
}

.markdown-body h1 { font-size: 1.6em; margin: 1em 0 0.5em; }
.markdown-body h2 { font-size: 1.35em; margin: 0.9em 0 0.4em; border-bottom: 1px solid var(--line); padding-bottom: 6px; }
.markdown-body h3 { font-size: 1.15em; margin: 0.8em 0 0.3em; }
.markdown-body p { margin: 0.5em 0; }
.markdown-body ul { padding-left: 1.5em; margin: 0.5em 0; }
.markdown-body li { margin: 0.25em 0; }
.markdown-body pre {
  background: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px;
  overflow-x: auto;
}
.markdown-body code {
  background: var(--paper-soft);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}
.markdown-body pre code {
  background: none;
  padding: 0;
}
.markdown-body a {
  color: var(--accent);
  text-decoration: underline;
}
.markdown-body strong { font-weight: 750; }
.markdown-body em { font-style: italic; }

.timer-widget {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 16px;
}

.timer-work { border-left: 4px solid var(--accent); }
.timer-break { border-left: 4px solid var(--yellow); }

.timer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
}

.timer-display {
  font-size: 42px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  text-align: center;
  letter-spacing: 2px;
  margin: 8px 0;
  color: var(--ink);
}

.timer-bar {
  height: 4px;
  background: var(--line);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 12px;
}

.timer-progress {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 1s linear;
}

.timer-break .timer-progress { background: #c4a748; }

.timer-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}

@media (max-width: 980px) {
  .shell,
  .quick-layout,
  .notes-layout,
  .today-layout {
    grid-template-columns: 1fr;
  }

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

  .nav {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .main,
  .sidebar {
    padding: 14px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .top-actions {
    justify-content: flex-start;
  }

  .nav,
  .search-box,
  .search-result {
    grid-template-columns: 1fr;
  }

  .data-tools {
    align-items: stretch;
    flex-direction: column;
  }

  .course-create {
    grid-template-columns: 1fr;
  }

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

  .todo-actions {
    grid-template-columns: 1fr;
  }

  .card-actions {
    grid-template-columns: 1fr;
  }
}