.study-planner,
.study-pace-choices {
  --study-ink: #f1f5fb;
  --study-muted: #b8c7dc;
  --study-surface: #17253a;
  --study-support: #213c58;
  --study-stroke: #516f8f;
  --study-accent: #b4d9ff;
  --study-done: #7be2b3;
  --study-done-surface: #183c36;
  --study-current: #ffd17a;
  --study-current-surface: #42341c;
  --study-next: #b4d9ff;
  --study-next-surface: #213c58;
  color: var(--study-ink);
  font-family: "Segoe UI", Arial, sans-serif;
  accent-color: var(--study-accent);
  caret-color: var(--study-accent);
}
html[data-theme="light"] :is(.study-planner, .study-pace-choices) {
  --study-ink: #1b2d48;
  --study-muted: #45617d;
  --study-surface: #fff;
  --study-support: #e0f1ff;
  --study-stroke: #adcce8;
  --study-accent: #223e68;
  --study-done: #14734d;
  --study-done-surface: #e0f6eb;
  --study-current: #855300;
  --study-current-surface: #fff1c9;
  --study-next: #346ca1;
  --study-next-surface: #e1effc;
}
.study-planner { width: 100%; min-width: 0; margin-block: 12px; }
:is(.study-planner, .study-pace-choices) *,
:is(.study-planner, .study-pace-choices) *::before,
:is(.study-planner, .study-pace-choices) *::after { box-sizing: border-box; }
:is(.study-planner, .study-pace-choices) ::selection { background: var(--study-support); color: var(--study-ink); }
:is(.study-planner, .study-pace-choices) :focus-visible { outline: 3px solid var(--study-accent); outline-offset: 3px; }
.study-planner button { font-family: inherit; touch-action: manipulation; cursor: pointer; box-shadow: none; transform: none; }
.study-planner-toggle {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  min-height: 48px;
  padding: 12px;
  border: 0;
  border-radius: 8px;
  background: var(--study-surface);
  color: var(--study-ink);
  text-align: left;
  font-size: 14px;
  line-height: 1.4;
  isolation: isolate;
  overflow: hidden;
}
.study-planner-toggle > :not(.study-toggle-track) { position: relative; z-index: 1; }
.study-planner-toggle strong { font-size: 15px; font-weight: 650; }
.study-planner-summary { margin-inline-start: auto; color: var(--study-muted); text-align: right; font-size: 12px; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.study-planner-chevron { width: 18px; height: 18px; flex: 0 0 18px; color: var(--study-accent); }
.study-planner-toggle[aria-expanded="true"] .study-planner-chevron { transform: rotate(180deg); }
.study-toggle-track { position: absolute; inset: 0; overflow: hidden; background: transparent; }
.study-toggle-track > span { display: block; height: 100%; background: var(--study-support); transition: width 160ms ease-out; }
.study-planner-panel { padding: 16px 0 0; }
.study-planner-panel[hidden] { display: none; }
.study-planner-section-heading { display: flex; align-items: baseline; gap: 8px; margin-block-end: 12px; }
.study-planner-section-heading h2 { margin: 0; font-size: 16px; font-weight: 650; line-height: 1.4; }
.study-planner-section-heading > span { margin-inline-start: auto; color: var(--study-muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.study-today .study-planner-section-heading { margin-block-end: 3px; }
.study-path-summary { color: var(--study-muted); font-size: 12px; line-height: 1.5; font-variant-numeric: tabular-nums; }
.study-goal-path { width: 100%; max-width: 370px; margin: 18px auto 0; padding: 0; list-style: none; }
.study-goal {
  --goal-color: var(--study-next);
  --goal-surface: var(--study-next-surface);
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 15px;
  min-width: 0;
  min-height: 114px;
  padding: 0;
  isolation: isolate;
}
.study-goal:last-child { min-height: 72px; }
.study-goal:nth-child(even) { margin-inline-start: 56px; }
.study-planner .study-goal-action { display: flex; align-items: flex-start; gap: 15px; width: 100%; min-width: 0; min-height: 72px; padding: 0; border: 0; border-radius: 8px; background: transparent; color: var(--study-ink); text-align: left; font-size: 14px; line-height: 1.4; }
.study-planner .study-goal-action:disabled { opacity: 1; cursor: wait; }
.study-goal-open { flex: 0 0 18px; width: 18px; height: 18px; margin-block-start: 27px; margin-inline-start: auto; color: var(--study-accent); }
.study-goal-action:active { background: var(--study-support); }
.study-goal[data-study-state="complete"] { --goal-color: var(--study-done); --goal-surface: var(--study-done-surface); }
.study-goal[data-study-state="current"] { --goal-color: var(--study-current); --goal-surface: var(--study-current-surface); }
.study-goal-node { position: relative; flex: 0 0 72px; width: 72px; height: 72px; color: var(--goal-color); }
.study-goal-ring { position: absolute; inset: 0; width: 72px; height: 72px; transform: rotate(-90deg); stroke-width: 3; }
.study-goal-ring-base { stroke: var(--study-stroke); }
.study-goal-ring-fill { stroke: currentColor; stroke-linecap: round; transition: stroke-dasharray 180ms ease-out; }
.study-goal[data-study-state="current"] .study-goal-ring-base { stroke: var(--goal-color); stroke-opacity: .45; }
.study-goal-symbol { position: absolute; inset: 9px; display: grid; place-items: center; border-radius: 50%; background: var(--goal-surface); }
.study-goal-symbol svg { display: block; width: 27px; height: 27px; }
.study-goal-copy { display: flex; flex-direction: column; align-items: flex-start; gap: 3px; min-width: 0; padding-block-start: 7px; }
.study-goal-copy strong { color: var(--study-ink); font-size: 14px; font-weight: 650; line-height: 1.4; overflow-wrap: break-word; }
.study-goal-count { color: var(--study-ink); font-size: 13px; font-variant-numeric: tabular-nums; line-height: 1.5; }
.study-goal-count > span { color: var(--study-muted); }
.study-goal-state { color: var(--goal-color); font-size: 12px; font-weight: 600; line-height: 1.5; }
.study-goal-connector { position: absolute; z-index: -1; top: 71px; left: 36px; width: 56px; height: 44px; overflow: visible; stroke: var(--study-stroke); stroke-width: 2.5; stroke-linecap: round; stroke-dasharray: 2 6; pointer-events: none; }
.study-goal:nth-child(even) .study-goal-connector { left: -20px; transform: scaleX(-1); }
.study-goal[data-study-state="complete"] .study-goal-connector { stroke: var(--study-done); }
.study-goal[data-study-state="unknown"] .study-goal-state { color: var(--study-muted); }
.study-progress-row + .study-progress-row { margin-block-start: 12px; }
.study-progress-copy { display: flex; justify-content: space-between; gap: 8px; margin-block-end: 4px; font-size: 13px; line-height: 1.5; }
.study-progress-copy > span:last-child { text-align: right; font-variant-numeric: tabular-nums; }
.study-progress-unit { color: var(--study-muted); }
.study-progress-track { height: 4px; overflow: hidden; border-radius: 2px; background: var(--study-stroke); }
.study-progress-track > span { display: block; height: 100%; background: var(--study-accent); transition: width 160ms ease-out; }
.study-week { margin-block-start: 24px; padding-block-start: 16px; border-block-start: 1px solid var(--study-stroke); }
.study-week-strip { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 4px; margin: 0 0 16px; padding: 0; list-style: none; }
.study-week-strip > li { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 8px 2px; min-width: 0; font-size: 12px; line-height: 1.4; }
.study-week-strip > li[aria-current="date"] { background: var(--study-support); border-radius: 8px; }
.study-day-name { font-weight: 650; }
.study-day-date { color: var(--study-muted); font-size: 10px; font-variant-numeric: tabular-nums; }
.study-day-mark { display: flex; align-items: center; justify-content: flex-start; width: 22px; height: 18px; color: var(--study-accent); }
.study-day-mark svg { display: block; width: 20px; height: 20px; }
.study-day-partial { display: block; height: 3px; min-width: 2px; background: currentColor; }
.study-day-empty { display: block; width: 100%; height: 1px; background: var(--study-stroke); }
.study-planner-footer { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-block-start: 8px; font-size: 12px; color: var(--study-muted); }
.study-planner-edit { min-width: 44px; min-height: 44px; padding: 10px 4px; border: 0; background: transparent; color: var(--study-accent); font-size: 13px; font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }
.study-planner-pro-note,
.study-planner-loading,
.study-pace-help { margin: 8px 0 0; color: var(--study-muted); font-size: 12px; line-height: 1.5; overflow-wrap: break-word; }
.study-pace-choices { min-width: 0; margin: 0; padding: 0; border: 0; }
.study-pace-choices legend { padding: 0; margin-block-end: 12px; font-size: 14px; font-weight: 650; line-height: 1.4; }
.study-pace-options { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.study-pace-option { display: flex; align-items: flex-start; gap: 8px; min-width: 0; min-height: 76px; padding: 10px 8px; border: 1px solid var(--study-stroke); border-radius: 8px; background: var(--study-surface); cursor: pointer; }
.study-pace-option:has(input:checked) { border-color: var(--study-accent); background: var(--study-support); }
.study-pace-option input { width: 16px; height: 16px; min-width: 16px; margin: 3px 0 0; cursor: pointer; }
.study-pace-option > span { display: block; min-width: 0; }
.study-pace-option strong { display: block; font-size: 13px; font-weight: 650; line-height: 1.5; }
.study-pace-option small { display: block; margin-block-start: 4px; color: var(--study-muted); font-size: 12px; line-height: 1.5; overflow-wrap: break-word; }
.study-pace-choices[disabled] .study-pace-option { opacity: .7; cursor: default; }
.study-pace-choices[disabled] input { cursor: default; }
.study-planner-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-block-start: 16px; }
.study-planner-save,
.study-planner-cancel { min-width: 88px; min-height: 44px; padding: 10px 16px; border: 1px solid var(--study-stroke); border-radius: 8px; background: var(--study-surface); color: var(--study-ink); font-size: 14px; font-weight: 600; line-height: 1.4; }
.study-planner-save { min-height: 48px; border-color: transparent; background: #223e68; color: #fff; }
.study-planner button:disabled { opacity: .7; cursor: default; }
.study-planner-status { margin: 8px 0 0; font-size: 13px; line-height: 1.5; color: var(--study-ink); overflow-wrap: break-word; }
.study-planner-status:empty { margin: 0; }
.study-pro-badge { display:inline-flex; padding:2px 5px; margin-inline-start:6px; border-radius:4px; background:var(--study-support); color:var(--study-accent); font-size:10px; font-weight:600; line-height:1.4; vertical-align:middle; }
.study-pro-gate { padding-block:12px 0; }
.study-pro-gate p { margin:0 0 12px; color:var(--study-muted); font-size:13px; line-height:1.5; }
.study-visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
@media (hover: hover) {
  .study-goal-action:enabled:hover { background: var(--study-support); }
  .study-planner-toggle:hover,
  .study-planner-cancel:enabled:hover { background: var(--study-support); }
  .study-planner-save:enabled:hover { background: #182e50; }
  .study-planner-edit:hover { text-decoration-thickness: 2px; }
}
@media (max-width: 430px) {
  .study-pace-options { grid-template-columns: 1fr; }
  .study-pace-option { min-height: 48px; align-items: center; padding: 10px 12px; }
  .study-pace-option input { margin-block-start: 0; }
  .study-pace-option strong { display: inline; margin-inline-end: 8px; }
  .study-pace-option small { display: inline; margin: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .study-toggle-track > span,
  .study-progress-track > span,
  .study-goal-ring-fill { transition: none; }
}