:root {
  --bg: #f4f6f3;
  --surface: #ffffff;
  --surface-muted: #f8faf8;
  --ink: #17201d;
  --ink-soft: #54615d;
  --muted: #7a8581;
  --line: #dce3df;
  --line-strong: #c8d2cd;
  --green: #176b54;
  --green-dark: #0f5845;
  --green-soft: #e3f2eb;
  --red: #a43a35;
  --red-soft: #f9e8e5;
  --amber: #8a6114;
  --amber-soft: #f8efcf;
  --blue: #356b91;
  --blue-soft: #e6f0f7;
  --shadow: 0 8px 24px rgba(30, 47, 40, 0.07);
  --question-scale: 1;
  --nav-height: 66px;
}

* { box-sizing: border-box; }

html {
  min-height: 100%;
  background: var(--bg);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-width: 0;
  min-height: 100vh;
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

body.modal-open { overflow: hidden; }

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

button, label { -webkit-tap-highlight-color: transparent; }

button { color: inherit; }

button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid rgba(53, 107, 145, 0.22);
  outline-offset: 2px;
}

svg { display: block; width: 20px; height: 20px; stroke-width: 2; }

h1, h2, h3, p { margin: 0; }

h1 { font-size: 25px; line-height: 1.25; }
h2 { font-size: 18px; line-height: 1.35; }
h3 { font-size: 16px; line-height: 1.45; }

.hidden { display: none !important; }
.muted { color: var(--muted); }

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: max(8px, env(safe-area-inset-top)) 14px 8px;
  border-bottom: 1px solid rgba(220, 227, 223, 0.9);
  background: rgba(244, 246, 243, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.brand-button {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  min-height: 46px;
  padding: 0;
  border: 0;
  background: transparent;
  text-align: left;
}

.brand-button > span:last-child { display: grid; min-width: 0; gap: 1px; }
.brand-button strong { overflow: hidden; font-size: 16px; text-overflow: ellipsis; white-space: nowrap; }
.brand-button small { color: var(--muted); font-size: 11px; }

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  border-radius: 8px;
  background: var(--green);
  color: #fff;
  font-size: 18px;
  font-weight: 800;
}

.topbar-actions { display: flex; align-items: center; gap: 7px; }

.test-env-badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 8px;
  border: 1px solid #d9bd78;
  border-radius: 5px;
  background: var(--amber-soft);
  color: #79520e;
  font-size: 11px;
  font-weight: 750;
}

.status-dot {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 32px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 11px;
}

.status-dot span { width: 7px; height: 7px; border-radius: 50%; background: var(--green); }
.status-dot.offline span { background: var(--red); }
.status-dot.syncing span { background: var(--blue); animation: sync-pulse 1.2s ease-in-out infinite; }
.status-dot b { font-weight: 600; }

@keyframes sync-pulse { 50% { opacity: 0.35; } }

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.icon-button:active { background: var(--surface-muted); transform: translateY(1px); }

.main-content {
  width: min(760px, 100%);
  min-height: calc(100vh - 64px);
  margin: 0 auto;
  padding: 18px 14px calc(var(--nav-height) + 30px + env(safe-area-inset-bottom));
}

.view { display: none; }
.view.active { display: block; }

.kicker {
  margin-bottom: 3px;
  color: var(--green);
  font-size: 12px;
  font-weight: 750;
}

.welcome-row, .page-heading, .section-heading, .row-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.welcome-row { min-height: 64px; margin-bottom: 14px; }
.page-heading { min-height: 65px; margin-bottom: 14px; }

.streak-pill {
  display: grid;
  grid-template-columns: 20px auto;
  grid-template-rows: auto auto;
  align-items: center;
  min-width: 72px;
  min-height: 54px;
  padding: 7px 10px;
  border: 1px solid #ecdca9;
  border-radius: 8px;
  background: var(--amber-soft);
  color: var(--amber);
}

.streak-pill svg { grid-row: 1 / 3; }
.streak-pill strong { font-size: 18px; line-height: 1; }
.streak-pill span { font-size: 10px; }

.daily-panel {
  display: grid;
  gap: 16px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.daily-copy { display: grid; gap: 10px; }
.daily-copy span { color: var(--ink-soft); font-size: 13px; }
.daily-copy strong { font-size: 14px; }

.progress-track {
  width: 100%;
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #e6ebe8;
}

.progress-track.thin { height: 5px; }
.progress-track > span { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--green); transition: width 180ms ease; }

.primary-button, .soft-button, .text-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 16px;
  border-radius: 8px;
  font-weight: 750;
}

.primary-button { border: 1px solid var(--green); background: var(--green); color: #fff; }
.primary-button:active { background: var(--green-dark); }
.primary-button:disabled { border-color: #a7b4af; background: #a7b4af; }
.soft-button { border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink); }
.soft-button.compact { min-height: 38px; padding: 0 11px; font-size: 12px; }
.text-button { min-height: 38px; padding: 0 5px; border: 0; background: transparent; color: var(--green); font-size: 13px; }
.continue-button { width: 100%; }

.beginner-study-button {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-width: 0;
  min-height: 68px;
  margin-top: 10px;
  padding: 10px 11px;
  border: 1px solid #b9d4c7;
  border-radius: 8px;
  background: #f7fbf8;
  text-align: left;
}

.beginner-study-button > span:nth-child(2) { display: grid; min-width: 0; gap: 2px; }
.beginner-study-button small { color: var(--green); font-size: 10px; font-weight: 750; }
.beginner-study-button strong { overflow-wrap: anywhere; font-size: 13px; }
.beginner-study-button em { color: var(--muted); font-size: 10px; font-style: normal; }
.beginner-study-button > svg { width: 18px; color: var(--muted); }

.home-route-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px;
  align-items: stretch;
  gap: 8px;
  margin-top: 10px;
}

.route-summary-button {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 10px;
  min-width: 0;
  min-height: 58px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  text-align: left;
}

.route-summary-button > span:nth-child(2) { display: grid; min-width: 0; gap: 2px; }
.route-summary-button small { color: var(--blue); font-size: 10px; font-weight: 700; }
.route-summary-button strong { overflow: hidden; font-size: 13px; text-overflow: ellipsis; white-space: nowrap; }
.route-summary-button > svg { width: 17px; color: var(--muted); }
.home-route-row > .icon-button { width: 44px; height: 100%; min-height: 58px; color: var(--blue); }

.home-section { margin-top: 22px; }
.section-heading { min-height: 36px; margin-bottom: 8px; }
.section-heading > span { font-size: 12px; }

.quick-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.quick-action {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  grid-template-rows: auto auto;
  align-items: center;
  min-width: 0;
  min-height: 72px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  text-align: left;
  box-shadow: 0 3px 12px rgba(30, 47, 40, 0.04);
}

.quick-action:active { border-color: var(--line-strong); background: var(--surface-muted); }
.quick-action strong { overflow: hidden; font-size: 14px; text-overflow: ellipsis; white-space: nowrap; }
.quick-action small { color: var(--muted); font-size: 11px; }

.quick-icon {
  display: grid;
  grid-row: 1 / 3;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
}

.quick-icon.red { color: var(--red); background: var(--red-soft); }
.quick-icon.amber { color: var(--amber); background: var(--amber-soft); }
.quick-icon.green { color: var(--green); background: var(--green-soft); }
.quick-icon.blue { color: var(--blue); background: var(--blue-soft); }

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

.metric-card {
  min-width: 0;
  min-height: 76px;
  padding: 12px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.metric-card strong { display: block; overflow: hidden; font-size: 22px; line-height: 1.15; text-overflow: ellipsis; white-space: nowrap; }
.metric-card span { display: block; margin-top: 5px; color: var(--muted); font-size: 11px; }

.compact-list, .question-list { display: grid; gap: 8px; }

.recent-row, .question-list-item {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.recent-result {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: var(--green);
  background: var(--green-soft);
}

.recent-result.wrong { color: var(--red); background: var(--red-soft); }
.recent-row > span:nth-child(2), .question-list-item .item-copy { min-width: 0; }
.recent-row strong, .item-copy strong { display: block; overflow: hidden; font-size: 13px; text-overflow: ellipsis; white-space: nowrap; }
.recent-row small, .item-copy small { display: block; margin-top: 3px; overflow: hidden; color: var(--muted); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }

.empty-state, .practice-empty {
  display: grid;
  justify-items: center;
  gap: 10px;
  padding: 56px 18px;
  color: var(--ink-soft);
  text-align: center;
}

.practice-empty p, .empty-state p { max-width: 360px; color: var(--muted); font-size: 14px; line-height: 1.6; }
.empty-icon { display: grid; place-items: center; width: 58px; height: 58px; border-radius: 8px; background: var(--green-soft); color: var(--green); }
.empty-icon svg { width: 28px; height: 28px; }
.practice-empty-actions { display: grid; width: min(340px, 100%); gap: 8px; }

.plan-overview {
  display: grid;
  gap: 10px;
  padding: 15px 0 14px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.plan-overview .row-between > div { display: flex; align-items: baseline; min-width: 0; gap: 8px; }
.plan-overview .row-between strong { font-size: 19px; }
.plan-overview .row-between span { color: var(--green); font-size: 12px; font-weight: 750; }
.plan-overview .row-between b { flex: 0 0 auto; color: var(--muted); font-size: 11px; font-weight: 600; }
.plan-overview p { color: var(--ink-soft); font-size: 12px; line-height: 1.6; }

.learn-section { margin-top: 24px; }
.learn-tabs { margin-bottom: 9px; }
.learn-mode-tabs { margin-bottom: 16px; }
.learn-panel { min-width: 0; }
.official-label { color: var(--blue); font-weight: 700; }

.material-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 116px;
  gap: 8px;
  margin-bottom: 10px;
}

.material-search {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  align-items: center;
  gap: 7px;
  min-width: 0;
  min-height: 44px;
  padding: 0 10px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface);
}

.material-search svg { width: 18px; color: var(--muted); }
.material-search input[type="search"] { min-height: 40px; padding: 0; border: 0; outline: 0; }
.material-list, .highlight-list { display: grid; gap: 8px; margin-top: 10px; }

.material-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px;
  align-items: stretch;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.material-row.read { border-color: #b8d2c6; }
.material-open {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 9px;
  min-width: 0;
  min-height: 76px;
  padding: 10px 8px 10px 10px;
  border: 0;
  background: transparent;
  text-align: left;
}

.material-status { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 8px; background: var(--surface-muted); color: var(--green); }
.material-status svg { width: 18px; }
.material-copy { display: grid; min-width: 0; gap: 4px; }
.material-copy > span { display: flex; flex-wrap: wrap; gap: 5px; }
.material-copy strong { overflow-wrap: anywhere; font-size: 13px; line-height: 1.45; }
.material-copy small { overflow: hidden; color: var(--muted); font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.material-open > svg { width: 17px; color: var(--muted); }
.material-favorite { align-self: center; border: 0; background: transparent; }
.material-favorite.active, .soft-button.active { border-color: #dfc46b; color: var(--amber); background: var(--amber-soft); }
.material-load-more { width: 100%; margin-top: 2px; }

.highlight-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px;
  align-items: center;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.highlight-open {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr) 18px;
  align-items: start;
  gap: 10px;
  min-width: 0;
  padding: 12px;
  border: 0;
  background: transparent;
  text-align: left;
}

.highlight-open > span:nth-child(2) { display: grid; min-width: 0; gap: 6px; }
.highlight-open q { overflow-wrap: anywhere; font-size: 13px; font-weight: 650; line-height: 1.65; quotes: none; }
.highlight-open small { color: var(--muted); font-size: 10px; line-height: 1.5; }
.highlight-open > svg { width: 17px; color: var(--muted); }
.highlight-swatch { width: 10px; height: 32px; border-radius: 3px; background: #f3d875; }
.highlight-swatch.green { background: #9dd2b9; }
.highlight-swatch.blue { background: #a9cce3; }

.study-task-list, .study-module-list, .knowledge-card-list, .exam-flow { display: grid; gap: 8px; }

.study-task {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) 40px;
  align-items: center;
  gap: 9px;
  min-width: 0;
  min-height: 64px;
  padding: 9px 8px;
  border-top: 1px solid var(--line);
  background: transparent;
}

.study-task:last-child { border-bottom: 1px solid var(--line); }
.study-task.done .study-task-copy strong { color: var(--muted); text-decoration: line-through; }
.study-task-check {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--surface);
  color: transparent;
}

.study-task.done .study-task-check { border-color: var(--green); background: var(--green); color: #fff; }
.study-task-check svg { width: 18px; height: 18px; }
.study-task-copy { display: grid; min-width: 0; gap: 3px; }
.study-task-copy strong { overflow-wrap: anywhere; font-size: 13px; line-height: 1.45; }
.study-task-copy small { color: var(--muted); font-size: 10px; line-height: 1.45; }
.study-task-action { width: 40px; height: 40px; flex: 0 0 40px; }

.study-module {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 36px;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-width: 0;
  min-height: 70px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  text-align: left;
}

.module-status {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--surface-muted);
  color: var(--green);
  font-size: 11px;
  font-weight: 800;
}

.study-module.done .module-status { background: var(--green); color: #fff; }
.study-module-copy { display: grid; min-width: 0; gap: 4px; }
.study-module-copy > span { display: flex; flex-wrap: wrap; gap: 5px; }
.study-module-copy strong { overflow-wrap: anywhere; font-size: 14px; line-height: 1.4; }
.study-module-copy small { overflow: hidden; color: var(--muted); font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.study-module > svg { width: 18px; color: var(--muted); }

.knowledge-card-button {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 20px;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-width: 0;
  min-height: 62px;
  padding: 10px 12px;
  border: 1px solid #bcd7ca;
  border-left: 4px solid var(--green);
  border-radius: 8px;
  background: var(--surface);
  text-align: left;
}

.knowledge-card-button > span { display: grid; min-width: 0; gap: 4px; }
.knowledge-card-button strong { overflow-wrap: anywhere; font-size: 13px; }
.knowledge-card-button small { overflow: hidden; color: var(--muted); font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.knowledge-card-button > svg { width: 18px; color: var(--green); }
.knowledge-card-button.editorial { border-color: #bfd3df; border-left-color: var(--blue); }
.knowledge-card-button.editorial > svg { color: var(--blue); }

.exam-step {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  position: relative;
  min-width: 0;
  padding: 5px 0 12px;
}

.exam-step:not(:last-child)::after { content: ""; position: absolute; top: 34px; bottom: -3px; left: 16px; width: 1px; background: #bad0dd; }
.exam-step-number { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--blue-soft); color: var(--blue); font-size: 12px; font-weight: 800; }
.exam-step-copy { display: grid; min-width: 0; gap: 4px; padding-top: 1px; }
.exam-step-copy strong { font-size: 13px; }
.exam-step-copy p { color: var(--ink-soft); font-size: 11px; line-height: 1.6; }
.exam-step-copy button { justify-self: start; min-height: 30px; padding: 0; font-size: 10px; }

.learn-footer-actions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 7px; margin-top: 24px; }
.learn-footer-actions .soft-button { min-width: 0; min-height: 54px; padding: 7px; flex-direction: column; font-size: 10px; line-height: 1.25; }
.learn-footer-actions .soft-button svg { width: 18px; height: 18px; }

.practice-session { margin: -8px -4px 0; }

.session-head {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 44px;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.session-progress { display: grid; min-width: 0; gap: 7px; }
.session-progress strong { overflow: hidden; font-size: 13px; text-overflow: ellipsis; white-space: nowrap; }
.session-progress span { color: var(--muted); font-size: 12px; white-space: nowrap; }

.question-card {
  min-height: 560px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.question-topline { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.badge-row { display: flex; flex-wrap: wrap; gap: 6px; }

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 25px;
  max-width: 100%;
  padding: 3px 8px;
  border-radius: 999px;
  background: #eef2ef;
  color: var(--ink-soft);
  font-size: 11px;
  line-height: 1.25;
}

.badge.green { color: var(--green); background: var(--green-soft); }
.badge.red { color: var(--red); background: var(--red-soft); }
.badge.amber { color: var(--amber); background: var(--amber-soft); }
.badge.blue { color: var(--blue); background: var(--blue-soft); }

.question-tools { display: flex; gap: 5px; }
.question-tools .icon-button { width: 38px; height: 38px; flex-basis: 38px; }
.question-tools .active { border-color: #dfc46b; color: var(--amber); background: var(--amber-soft); }

.source-line {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}

.source-line svg { width: 15px; height: 15px; flex: 0 0 15px; }

.question-stem {
  margin-top: 14px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--ink);
  font-size: calc(17px * var(--question-scale));
  font-weight: 540;
  line-height: 1.78;
}

.source-image-wrap {
  margin-top: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #eef1ef;
}

.source-image-wrap img { display: block; width: 100%; height: auto; }
.source-image-caption { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 10px; color: var(--muted); font-size: 11px; }
.source-image-actions { display: flex; align-items: center; gap: 8px; }
.source-image-actions .text-button { min-height: 32px; padding: 0 3px; }

.option-list { display: grid; gap: 9px; margin-top: 18px; }

.option-button {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 20px;
  align-items: start;
  gap: 9px;
  width: 100%;
  min-height: 56px;
  padding: 10px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface-muted);
  color: var(--ink);
  text-align: left;
}

.option-button:active:not(:disabled) { background: #f1f5f2; }
.option-button:disabled { opacity: 1; }

.option-key {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--surface);
  font-size: 13px;
  font-weight: 800;
}

.option-text { padding: 4px 0; overflow-wrap: anywhere; font-size: calc(15px * var(--question-scale)); line-height: 1.55; }
.option-status { display: grid; place-items: center; width: 20px; height: 32px; }
.option-status svg { width: 18px; height: 18px; }
.option-button.correct { border-color: #5a9d86; background: var(--green-soft); }
.option-button.correct .option-key { border-color: var(--green); background: var(--green); color: #fff; }
.option-button.correct .option-status { color: var(--green); }
.option-button.wrong { border-color: #cf7f78; background: var(--red-soft); }
.option-button.wrong .option-key { border-color: var(--red); background: var(--red); color: #fff; }
.option-button.wrong .option-status { color: var(--red); }

.subjective-editor { display: grid; gap: 8px; margin-top: 18px; }
.subjective-editor label, .note-editor label { color: var(--ink-soft); font-size: 12px; font-weight: 650; }

.related-material-button {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 9px;
  width: 100%;
  min-width: 0;
  min-height: 54px;
  margin-top: 9px;
  padding: 8px 10px;
  border: 1px solid #b9d4c7;
  border-radius: 8px;
  background: #f7fbf8;
  color: var(--green);
  text-align: left;
}

.related-material-button > span { display: grid; min-width: 0; gap: 2px; }
.related-material-button strong { color: var(--ink); font-size: 12px; }
.related-material-button small { overflow: hidden; color: var(--muted); font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.related-material-button > svg { width: 18px; }

textarea, select, input[type="search"] {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
}

input[type="date"] {
  width: 100%;
  min-height: 44px;
  padding: 0 10px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
}

textarea { min-height: 112px; padding: 11px; resize: vertical; line-height: 1.65; }
select, input[type="search"] { min-height: 44px; padding: 0 10px; }

.answer-panel, .ai-panel, .note-editor, .mistake-panel {
  margin-top: 16px;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-muted);
}

.answer-panel.authoritative { border-left: 4px solid var(--green); }
.answer-heading, .ai-heading { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.answer-heading strong, .ai-heading strong { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; }
.answer-heading svg, .ai-heading svg { width: 17px; height: 17px; }
.answer-text { white-space: pre-wrap; overflow-wrap: anywhere; font-size: 14px; line-height: 1.72; }
.answer-boundary { margin-top: 8px; color: var(--muted); font-size: 11px; line-height: 1.5; }

.ai-panel { border-color: #c9dbe7; background: #f3f8fb; }
.ai-heading { color: var(--blue); }
.ai-heading small { color: var(--muted); font-size: 10px; font-weight: 500; }
.ai-actions, .question-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.ai-actions button { flex: 1 1 130px; }
.ai-output { display: grid; gap: 12px; margin-top: 12px; }
.ai-output h4 { margin: 0 0 5px; font-size: 13px; }
.ai-output p, .ai-output li { overflow-wrap: anywhere; color: #30444f; font-size: 13px; line-height: 1.65; }
.ai-output ul { margin: 0; padding-left: 20px; }
.ai-details { border-top: 1px solid #d6e3eb; padding-top: 9px; }
.ai-details summary { color: var(--blue); cursor: pointer; font-size: 13px; font-weight: 750; }
.ai-details ul { margin-top: 8px; }
.ai-output .score-line { display: flex; align-items: center; gap: 8px; }
.ai-output .score { display: inline-grid; place-items: center; min-width: 46px; height: 32px; border-radius: 8px; background: var(--blue); color: #fff; font-weight: 800; }
.ai-loading { display: flex; align-items: center; gap: 8px; color: var(--blue); font-size: 13px; }
.hint-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 5px; margin: 0 0 9px; padding: 7px 8px; border-radius: 6px; background: var(--blue-soft); }
.hint-actions > span { margin-right: 2px; color: var(--blue); font-size: 10px; font-weight: 700; }
.hint-actions .text-button { min-height: 30px; padding: 0 7px; border-radius: 6px; color: var(--blue); font-size: 11px; }
.hint-actions .text-button.active { background: var(--surface); box-shadow: 0 1px 4px rgba(30, 47, 40, 0.1); }
.spin { animation: spin 900ms linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.question-actions { padding-top: 5px; }
.question-actions > button { flex: 1 1 120px; }
.question-actions .danger-action { border-color: #d6a19d; color: var(--red); background: var(--red-soft); }

.mistake-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.tag-toggle { min-height: 34px; padding: 0 10px; border: 1px solid var(--line-strong); border-radius: 999px; background: var(--surface); color: var(--ink-soft); font-size: 12px; }
.tag-toggle.active { border-color: var(--amber); background: var(--amber-soft); color: var(--amber); }
.note-editor { display: grid; gap: 8px; }
.note-editor textarea { min-height: 74px; background: var(--surface); }

.question-footer {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) 46px;
  gap: 8px;
  margin-top: 18px;
}

.question-footer button { min-height: 46px; }
.question-footer .primary-button { padding: 0 10px; }
.question-footer > span { display: block; min-height: 46px; }

.segmented, .mini-segmented {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #e9eeeb;
}

.segmented { margin-bottom: 12px; }
.segmented button, .mini-segmented button { min-height: 38px; padding: 0 8px; border: 0; border-radius: 6px; background: transparent; color: var(--ink-soft); font-size: 12px; white-space: nowrap; }
.segmented button.active, .mini-segmented button.active { background: var(--surface); color: var(--green); font-weight: 750; box-shadow: 0 2px 7px rgba(30, 47, 40, 0.09); }

.inline-summary { min-height: 34px; margin-bottom: 8px; color: var(--muted); font-size: 12px; line-height: 1.5; }

.question-list-item { grid-template-columns: minmax(0, 1fr) auto; align-items: start; }
.question-list-item .item-copy { display: grid; gap: 5px; }
.item-badges { display: flex; flex-wrap: wrap; gap: 5px; }
.item-copy p { display: -webkit-box; overflow: hidden; color: var(--ink-soft); font-size: 13px; line-height: 1.55; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.item-meta { display: flex; flex-wrap: wrap; gap: 8px; color: var(--muted); font-size: 10px; }
.item-action { width: 40px; height: 40px; flex-basis: 40px; }

.report-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.report-section { margin-top: 22px; }

.week-chart {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  align-items: end;
  gap: 6px;
  height: 180px;
  padding: 14px 10px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.day-bar { display: grid; grid-template-rows: 1fr auto auto; align-items: end; justify-items: center; gap: 5px; height: 100%; }
.day-bar-track { display: flex; align-items: flex-end; width: min(24px, 80%); height: 100%; border-radius: 5px 5px 2px 2px; background: #edf1ef; overflow: hidden; }
.day-bar-fill { display: block; width: 100%; min-height: 2px; background: var(--green); border-radius: inherit; }
.day-bar strong { font-size: 10px; }
.day-bar small { color: var(--muted); font-size: 9px; }
.day-bar.today small { color: var(--green); font-weight: 800; }

.progress-list { display: grid; gap: 8px; }
.progress-row { display: grid; gap: 7px; padding: 11px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
.progress-row .row-between { font-size: 12px; }
.progress-row .row-between span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.progress-row .row-between strong { flex: 0 0 auto; }
.progress-row small { color: var(--muted); font-size: 10px; }

.settings-group { margin-top: 18px; overflow: hidden; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
.settings-group > h2 { padding: 13px 14px 8px; color: var(--ink-soft); font-size: 13px; }

.setting-row, .menu-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 62px;
  padding: 10px 14px;
  border: 0;
  border-top: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  text-align: left;
}

.setting-row > span, .menu-row > span { display: grid; min-width: 0; flex: 1; gap: 3px; }
.setting-row strong, .menu-row strong { font-size: 13px; }
.setting-row small, .menu-row small { overflow: hidden; color: var(--muted); font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.setting-row select { width: auto; min-width: 92px; min-height: 40px; }

.switch-row { cursor: pointer; }
.switch-input { appearance: none; width: 48px; height: 28px; flex: 0 0 48px; margin: 0; border: 1px solid var(--line-strong); border-radius: 999px; background: #dde3df; transition: background 160ms ease; }
.switch-input::after { content: ""; display: block; width: 22px; height: 22px; margin: 2px; border-radius: 50%; background: #fff; box-shadow: 0 1px 4px rgba(20, 31, 27, 0.18); transition: transform 160ms ease; }
.switch-input:checked { border-color: var(--green); background: var(--green); }
.switch-input:checked::after { transform: translateX(20px); }
.mini-segmented { min-width: 132px; }

.status-setting { align-items: center; }
.authority-note { display: flex; gap: 8px; padding: 10px 14px 13px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 11px; line-height: 1.55; }
.authority-note svg { width: 17px; height: 17px; flex: 0 0 17px; color: var(--green); }

.menu-row { width: 100%; justify-content: flex-start; }
.menu-row > svg:first-child { color: var(--green); }
.menu-row > svg:last-child { width: 17px; color: var(--muted); }
.file-row { position: relative; cursor: pointer; }
.file-row input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.danger-row > svg:first-child, .danger-row strong { color: var(--red); }
.version-line { padding: 18px 12px 0; color: var(--muted); font-size: 10px; line-height: 1.6; text-align: center; }

.sync-account-panel {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 44px;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 11px;
  border: 1px solid #b9d4c7;
  border-radius: 8px;
  background: var(--surface);
}

.sync-account-panel > span:nth-child(2) { display: grid; min-width: 0; gap: 3px; }
.sync-account-panel strong { overflow-wrap: anywhere; font-size: 13px; }
.sync-account-panel small { color: var(--muted); font-size: 10px; line-height: 1.45; }
.sync-account-icon { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 8px; background: var(--green-soft); color: var(--green); }
.sync-account-icon.syncing, .sync-account-icon.connecting { background: var(--blue-soft); color: var(--blue); }
.sync-account-icon.offline, .sync-account-icon.error { background: var(--red-soft); color: var(--red); }

.test-account-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 10px;
  padding: 11px 12px;
  border: 1px solid #d9bd78;
  border-radius: 8px;
  background: var(--amber-soft);
}

.test-account-panel > span { display: grid; gap: 2px; min-width: 0; }
.test-account-panel strong { font-size: 12px; }
.test-account-panel small { color: #79520e; font-size: 13px; font-weight: 750; }
.test-account-panel button { flex: 0 0 auto; background: #fff; }

.bottom-nav {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  height: calc(var(--nav-height) + env(safe-area-inset-bottom));
  padding: 5px max(8px, env(safe-area-inset-left)) env(safe-area-inset-bottom) max(8px, env(safe-area-inset-right));
  border-top: 1px solid rgba(209, 218, 214, 0.95);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.nav-button {
  display: grid;
  grid-template-rows: 25px 15px;
  place-items: center;
  min-width: 0;
  min-height: 54px;
  padding: 4px 2px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 10px;
}

.nav-button svg { width: 21px; height: 21px; }
.nav-button.active { color: var(--green); font-weight: 750; }
.nav-button:active { background: var(--green-soft); }

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-top: env(safe-area-inset-top);
  background: rgba(14, 24, 20, 0.44);
}

.modal-sheet {
  width: min(720px, 100%);
  max-height: min(88vh, 820px);
  overflow: hidden;
  border-radius: 8px 8px 0 0;
  background: var(--surface);
  box-shadow: 0 -12px 34px rgba(15, 28, 23, 0.2);
  animation: sheet-in 180ms ease-out;
}

@keyframes sheet-in { from { transform: translateY(30px); opacity: 0.6; } }
.modal-handle { width: 38px; height: 4px; margin: 7px auto 2px; border-radius: 999px; background: #cdd5d1; }
.modal-header { display: flex; align-items: center; justify-content: space-between; min-height: 58px; padding: 5px 14px; border-bottom: 1px solid var(--line); }
.modal-body { max-height: calc(88vh - 72px); overflow-y: auto; padding: 14px 14px calc(18px + env(safe-area-inset-bottom)); overscroll-behavior: contain; }

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 11px; }
.form-field { display: grid; gap: 6px; min-width: 0; }
.form-field.wide { grid-column: 1 / -1; }
.form-field > span { color: var(--ink-soft); font-size: 11px; font-weight: 650; }
.form-actions { display: grid; grid-template-columns: 1fr 1.5fr; gap: 8px; margin-top: 16px; }

.question-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 7px; }
.question-grid button { aspect-ratio: 1; min-width: 0; min-height: 42px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface-muted); font-size: 12px; }
.question-grid button.current { border-color: var(--green); background: var(--green); color: #fff; }
.question-grid button.correct { border-color: #8ab5a4; background: var(--green-soft); color: var(--green); }
.question-grid button.wrong { border-color: #d7a19c; background: var(--red-soft); color: var(--red); }

.source-list { display: grid; gap: 8px; }
.source-item { display: grid; gap: 7px; padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface-muted); }
.source-item p { color: var(--muted); font-size: 11px; line-height: 1.5; overflow-wrap: anywhere; }
.source-item .source-actions { display: flex; flex-wrap: wrap; gap: 8px; }

.module-modal-head { display: grid; gap: 9px; padding-bottom: 13px; border-bottom: 1px solid var(--line); }
.module-modal-head p { color: var(--ink-soft); font-size: 12px; line-height: 1.65; }
.module-modal-meta { display: flex; flex-wrap: wrap; gap: 6px; }
.module-modal-actions { display: grid; grid-template-columns: 1fr 1.35fr; gap: 8px; margin-top: 14px; }
.module-entry-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 14px; }
.module-card-stack { display: grid; gap: 9px; margin-top: 16px; }

.material-reader { display: grid; gap: 12px; }
.material-reader-meta { display: flex; flex-wrap: wrap; gap: 6px; }
.material-prompt { padding: 10px; border-left: 4px solid var(--blue); background: var(--blue-soft); color: var(--ink); font-size: 13px; font-weight: 700; line-height: 1.65; }
.material-body {
  min-height: 120px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fcfdfc;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.9;
  user-select: text;
  -webkit-user-select: text;
}

.material-mark { padding: 1px 0; border-radius: 2px; background: #f8e9a5; color: inherit; }
.material-mark.green { background: #ccebdc; }
.material-mark.blue { background: #cee3f0; }
.highlight-tool { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 10px; padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface-muted); }
.highlight-tool > div:first-child { display: grid; min-width: 0; gap: 3px; }
.highlight-tool strong { font-size: 12px; }
.highlight-tool small { color: var(--muted); font-size: 10px; }
.highlight-controls { display: flex; align-items: center; gap: 8px; }
.color-swatches { display: flex; gap: 5px; }
.color-swatches button { width: 28px; height: 28px; padding: 0; border: 2px solid transparent; border-radius: 50%; background: #f3d875; }
.color-swatches button.green { background: #9dd2b9; }
.color-swatches button.blue { background: #a9cce3; }
.color-swatches button.active { border-color: var(--ink); box-shadow: 0 0 0 2px var(--surface); }
.saved-highlight-list { display: grid; gap: 7px; padding-top: 4px; }
.saved-highlight-list > strong { font-size: 12px; }
.saved-highlight-list > div { display: grid; grid-template-columns: 10px minmax(0, 1fr) 40px; align-items: center; gap: 8px; padding: 8px 0; border-top: 1px solid var(--line); }
.saved-highlight-list q { overflow-wrap: anywhere; font-size: 11px; line-height: 1.55; quotes: none; }
.material-reader-actions { display: grid; grid-template-columns: 1fr 1fr 1.25fr; gap: 7px; }

.verbatim-card {
  display: grid;
  gap: 10px;
  padding: 13px;
  border: 1px solid #bdd8cc;
  border-left: 4px solid var(--green);
  border-radius: 8px;
  background: #f8fbf9;
}

.verbatim-card.editorial { border-color: #bfd3df; border-left-color: var(--blue); background: #f5f9fb; }
.verbatim-card.editorial .source-citation svg { color: var(--blue); }

.verbatim-card header { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.verbatim-card h3 { font-size: 14px; }
.verbatim-content { white-space: pre-wrap; overflow-wrap: anywhere; color: var(--ink); font-size: 13px; line-height: 1.72; }
.mnemonic-line { padding: 8px 9px; border-radius: 6px; background: var(--amber-soft); color: var(--amber); font-size: 12px; font-weight: 700; }
.source-citation { display: flex; align-items: flex-start; gap: 6px; color: var(--muted); font-size: 10px; line-height: 1.5; }
.source-citation svg { width: 14px; height: 14px; flex: 0 0 14px; color: var(--green); }

.audit-metrics { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; margin-bottom: 14px; }
.audit-metrics div { min-width: 0; padding: 9px 5px; border: 1px solid var(--line); border-radius: 8px; text-align: center; }
.audit-metrics strong { display: block; font-size: 17px; }
.audit-metrics span { display: block; margin-top: 3px; color: var(--muted); font-size: 9px; }
.plain-point-list { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.plain-point-list li { padding: 10px 2px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 12px; line-height: 1.6; }
.authority-list { display: grid; gap: 8px; }
.authority-row { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: start; gap: 9px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.authority-row span:last-child { display: grid; gap: 3px; }
.authority-row strong { font-size: 12px; }
.authority-row small { color: var(--muted); font-size: 10px; line-height: 1.5; }

.toast {
  position: fixed;
  right: 16px;
  bottom: calc(var(--nav-height) + 18px + env(safe-area-inset-bottom));
  left: 16px;
  z-index: 150;
  max-width: 520px;
  min-height: 42px;
  margin: auto;
  padding: 11px 14px;
  border-radius: 8px;
  background: #1e2925;
  color: #fff;
  font-size: 12px;
  line-height: 1.5;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 160ms ease, transform 160ms ease;
}

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

@media (min-width: 700px) {
  .main-content { padding-right: 20px; padding-left: 20px; }
  .quick-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .quick-action { grid-template-columns: 38px minmax(0, 1fr); }
  .bottom-nav { right: 50%; left: auto; width: min(760px, 100%); transform: translateX(50%); border-right: 1px solid var(--line); border-left: 1px solid var(--line); }
  .question-grid { grid-template-columns: repeat(10, minmax(0, 1fr)); }
}

@media (max-width: 374px) {
  .main-content { padding-right: 10px; padding-left: 10px; }
  .status-dot b { display: none; }
  .metric-card strong { font-size: 19px; }
  .question-card { padding: 13px; }
  .question-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .form-grid { grid-template-columns: 1fr; }
  .form-field.wide { grid-column: auto; }
  .learn-footer-actions { grid-template-columns: 1fr; }
  .learn-footer-actions .soft-button { min-height: 44px; flex-direction: row; }
  .audit-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .material-toolbar { grid-template-columns: 1fr; }
  .highlight-tool { grid-template-columns: 1fr; }
  .highlight-controls { justify-content: space-between; }
  .material-reader-actions { grid-template-columns: 1fr; }
  .module-entry-actions { grid-template-columns: 1fr; }
}

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