:root {
  --lerna-brand: #6f9f92;
  --lerna-brand-strong: #4a7c74;
  --lerna-ink: #13221f;
  --lerna-paper: #f5f3ef;
  --lerna-line: #e5e2dc;
  --lerna-safe-top: env(safe-area-inset-top, 0px);
  --lerna-safe-bottom: env(safe-area-inset-bottom, 0px);
  --lerna-mobile-topbar-height: 64px;
  --lerna-mobile-bottomnav-height: 74px;
  --lerna-mobile-top-offset: calc(
    var(--lerna-mobile-topbar-height) + var(--lerna-safe-top)
  );
  --lerna-mobile-bottom-offset: calc(
    var(--lerna-mobile-bottomnav-height) + var(--lerna-safe-bottom)
  );
}

.safe-area-inset-bottom {
  padding-bottom: max(10px, var(--lerna-safe-bottom));
}

.lerna-app-shell {
  background:
    radial-gradient(circle at top, rgba(111, 159, 146, 0.08), transparent 32%),
    var(--lerna-paper);
}

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

.lerna-main-inner {
  width: min(100%, 960px);
  margin: 0 auto;
  padding: 28px 18px 32px;
}

.lerna-brand-lockup,
.lerna-desktop-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lerna-brand-copy {
  min-width: 0;
}

.lerna-brand-name {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
  color: #111827;
}

.lerna-brand-tag {
  margin: 4px 0 0;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #8b948f;
}

.lerna-brand-mark {
  display: block;
  width: 32px;
  height: auto;
  max-height: 32px;
  flex-shrink: 0;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  object-position: center;
}

.lerna-brand-mark--hero {
  width: 72px;
  max-height: 72px;
}

.lerna-auth-brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin: 0;
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  color: #111827;
  letter-spacing: -0.04em;
}

.lerna-mobile-topbar {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 35;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  padding: calc(10px + var(--lerna-safe-top)) 16px 12px;
  border-bottom: 1px solid rgba(229, 226, 220, 0.96);
  background: rgba(245, 243, 239, 0.94);
  backdrop-filter: blur(18px);
}

.lerna-mobile-topbar-main {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.lerna-mobile-topbar-context {
  min-width: 0;
}

.lerna-mobile-topbar-label {
  margin: 0;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #8b948f;
}

.lerna-mobile-topbar-title {
  margin: 3px 0 0;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.15;
  color: var(--lerna-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lerna-mobile-topbar-action {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #d7ddd6;
  border-radius: 16px;
  background: #ffffff;
  color: var(--lerna-brand-strong);
  font-size: 12px;
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
}

.lerna-mobile-bottomnav {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 30;
  display: flex;
  border-top: 1px solid rgba(229, 226, 220, 0.96);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
  padding-bottom: max(10px, var(--lerna-safe-bottom));
}

.lerna-mobile-sheet-backdrop {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgba(15, 23, 42, 0.28);
}

.lerna-mobile-sheet {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 41;
  padding: 0 16px calc(16px + var(--lerna-safe-bottom));
}

.lerna-mobile-sheet-panel {
  border: 1px solid var(--lerna-line);
  border-radius: 26px 26px 22px 22px;
  background: linear-gradient(180deg, #ffffff 0%, #fbfaf7 100%);
  box-shadow: 0 -20px 44px rgba(15, 23, 42, 0.18);
  padding: 16px;
}

.lerna-mobile-sheet-grabber {
  width: 42px;
  height: 4px;
  border-radius: 999px;
  background: #d9d5ce;
  margin: 0 auto 14px;
}

.lerna-mobile-sheet-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
}

.lerna-mobile-sheet-title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: #111827;
}

.lerna-mobile-sheet-copy {
  margin: 4px 0 0;
  font-size: 12px;
  color: #6b7280;
}

.lerna-mobile-sheet-close {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #ddd6ca;
  border-radius: 14px;
  background: #ffffff;
  color: #6b7280;
  font-size: 22px;
  line-height: 1;
}

.lerna-mobile-sheet-list {
  display: grid;
  gap: 10px;
}

.lerna-mobile-sheet-link {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid #ece7df;
  border-radius: 18px;
  background: #fcfbf8;
  color: #475569;
  text-align: left;
  padding: 14px;
  transition:
    border-color 120ms ease,
    color 120ms ease,
    background-color 120ms ease,
    transform 120ms ease;
}

.lerna-mobile-sheet-link:hover,
.lerna-mobile-sheet-link.is-active {
  border-color: #8aaea8;
  background: #eef6f4;
  color: #356860;
  transform: translateY(-1px);
}

.lerna-mobile-sheet-icon {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: #eff6f4;
  color: #356860;
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 700;
}

.lerna-mobile-sheet-link-copy {
  font-size: 14px;
  font-weight: 600;
}

.lerna-root-splash {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(circle at top, rgba(111, 159, 146, 0.12), transparent 34%),
    var(--lerna-paper);
}

.lerna-root-splash-card {
  width: min(100%, 320px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 28px 24px;
  border: 1px solid rgba(229, 226, 220, 0.9);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 20px 42px rgba(15, 23, 42, 0.08);
  text-align: center;
}

.lerna-root-splash-name {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  color: #111827;
  letter-spacing: -0.03em;
}

.lerna-root-splash-copy {
  margin: 0;
  font-size: 13px;
  color: #6b7280;
}

/* Quiet gamification surfaces - compact, calm, and aligned with the
   existing paper/card language. */
.lerna-goals-panel,
.lerna-mastery-card,
.lerna-milestone-log,
.lerna-group-progress {
  border: 1px solid rgba(229, 226, 220, 0.95);
  border-radius: 22px;
  background: linear-gradient(180deg, #ffffff 0%, #faf8f4 100%);
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.04);
}

.lerna-goals-panel,
.lerna-mastery-card,
.lerna-milestone-log,
.lerna-progress-preview {
  display: grid;
  gap: 10px;
  padding: 12px;
}

.lerna-goals-panel {
  align-content: start;
}

.lerna-goal-chip,
.lerna-mastery-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  max-width: 100%;
  min-height: 28px;
  padding: 5px 10px;
  border: 1px solid #d9e2dd;
  border-radius: 999px;
  background: #f3f7f5;
  color: #355c56;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.2;
}

.lerna-goal-chip {
  white-space: normal;
}

.lerna-mastery-chip {
  border-color: #e0e6e1;
  background: #f7f8f6;
  color: #5d6d69;
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.lerna-mastery-card {
  gap: 12px;
}

.lerna-progress-preview.lerna-progress-preview {
  max-width: 28rem;
  border: 1px solid #dfe8e2;
  border-radius: 22px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fbf9 100%);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.04);
}

.lerna-milestone-log {
  color: #5f6a61;
  font-size: 12px;
  line-height: 1.45;
}

.lerna-panel-page.lerna-panel-page {
  max-width: 760px;
}

.lerna-progress-page.lerna-progress-page {
  max-width: 920px;
}

.lerna-progress-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.lerna-progress-layout {
  display: grid;
  gap: 12px;
}

.lerna-progress-card {
  border: 1px solid #e5e2dc;
  border-radius: 22px;
  background: linear-gradient(180deg, #ffffff 0%, #faf8f4 100%);
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.04);
  padding: 18px;
}

.lerna-progress-milestones {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
}

.lerna-deck-detail {
  max-width: 960px;
  margin: 0 auto;
}

.lerna-deck-toolbar {
  padding: 14px 16px;
}

.lerna-deck-toolbar-meta {
  justify-content: space-between;
}

.lerna-card-pronounce,
.lerna-study-pronounce {
  margin-bottom: 12px;
}

.lerna-card-face-text,
.lerna-study-card-text,
.lerna-study-answer-text {
  line-height: 1.6;
  text-wrap: balance;
  word-break: break-word;
}

.lerna-deck-card-surface,
.lerna-study-card-surface {
  -webkit-user-select: none;
  user-select: none;
}

.lerna-study-shell {
  max-width: min(100%, 840px);
}

.lerna-study-card.lerna-study-card {
  max-width: 40rem;
  min-height: 21rem;
  padding: 40px 36px;
}

.lerna-study-card-text {
  font-size: clamp(1rem, 0.55vw + 0.95rem, 1.35rem);
}

.lerna-study-answer-text {
  font-size: clamp(0.95rem, 0.4vw + 0.92rem, 1.15rem);
}

.lerna-group-progress {
  display: grid;
  gap: 8px;
  padding: 12px;
}

.lerna-progress-meter {
  --lerna-progress: 0%;
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 8px;
  border: 1px solid rgba(216, 210, 200, 0.95);
  border-radius: 999px;
  background: #ebe6df;
}

.lerna-progress-meter::before {
  content: "";
  display: block;
  height: 100%;
  width: var(--lerna-progress);
  border-radius: inherit;
  background: linear-gradient(90deg, #7da99d 0%, #4a7c74 100%);
}

.lerna-progress-meter > .lerna-progress-meter-fill,
.lerna-progress-meter > [data-lerna-progress-fill] {
  display: block;
  height: 100%;
  width: var(--lerna-progress);
  border-radius: inherit;
  background: linear-gradient(90deg, #7da99d 0%, #4a7c74 100%);
}

@media (min-width: 768px) {
  .lerna-goals-panel,
  .lerna-mastery-card,
  .lerna-milestone-log,
  .lerna-group-progress,
  .lerna-progress-preview {
    border-radius: 24px;
    padding: 16px 18px;
  }

  .lerna-goals-panel,
  .lerna-mastery-card,
  .lerna-milestone-log {
    gap: 12px;
  }

  .lerna-goal-chip,
  .lerna-mastery-chip {
    min-height: 30px;
    padding: 6px 11px;
  }

  .lerna-progress-meter {
    height: 10px;
  }
}

.ypt-tools-shell {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ypt-tool-home-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.ypt-tool-card {
  border: 1px solid #e5e2dc;
  border-radius: 20px;
  background: linear-gradient(180deg, #ffffff 0%, #fbfaf7 100%);
  padding: 18px;
  text-align: left;
  transition:
    border-color 120ms ease,
    transform 120ms ease,
    box-shadow 120ms ease;
}

.ypt-tool-card:hover {
  border-color: #88a9a3;
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
}

.ypt-tool-card-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 56px;
  height: 32px;
  padding: 0 10px;
  border-radius: 999px;
  background: #eff6f4;
  color: #356860;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.ypt-tool-card-title {
  margin-top: 14px;
  font-size: 15px;
  font-weight: 600;
  color: #111827;
}

.ypt-tool-card-copy {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.55;
  color: #6b7280;
}

.ypt-tool-workspace-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.ypt-tool-workspace-head--flush {
  padding: 16px 18px 0;
  margin-bottom: 0;
}

.ypt-tool-workspace-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #94a3b8;
}

.ypt-tool-workspace-title {
  margin-top: 3px;
  font-size: 16px;
  font-weight: 600;
  color: #0f172a;
}

.ypt-tool-back-btn {
  appearance: none;
  border: 1px solid #d8d2c8;
  border-radius: 999px;
  background: #ffffff;
  color: #475569;
  padding: 7px 12px;
  font-size: 11px;
  font-weight: 600;
  transition:
    border-color 120ms ease,
    color 120ms ease,
    background-color 120ms ease;
}

.ypt-tool-back-btn:hover {
  border-color: #88a9a3;
  color: #356860;
  background: #f4faf8;
}

.ypt-calc-shell {
  border: 1px solid #e5e2dc;
  border-radius: 24px;
  background: linear-gradient(180deg, #ffffff 0%, #f9f6f0 100%);
  padding: 16px;
}

.ypt-calc-device {
  max-width: 448px;
  margin: 0 auto;
  border-radius: 28px;
  padding: 16px;
  background: linear-gradient(180deg, #3a3e43 0%, #1f2428 100%);
  border: 1px solid #111418;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    0 18px 40px rgba(16, 24, 40, 0.18);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ypt-calc-display {
  border-radius: 18px;
  border: 1px solid #a2ad98;
  background: linear-gradient(180deg, #dce6d4 0%, #c7d4bf 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65);
  padding: 12px 14px;
  color: #1b2421;
}

.ypt-calc-display-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 10px;
  line-height: 1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #4f5b51;
  margin-bottom: 10px;
}

.ypt-calc-display-expression {
  min-height: 18px;
  font-size: 13px;
  color: #4a564c;
  word-break: break-word;
}

.ypt-calc-display-result {
  min-height: 44px;
  margin-top: 6px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 34px;
  line-height: 1;
  text-align: right;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  word-break: break-word;
}

.ypt-calc-display-hint {
  margin-top: 8px;
  font-size: 11px;
  color: #5f6a61;
  text-align: right;
}

.ypt-calc-history {
  display: grid;
  gap: 8px;
  max-height: 140px;
  overflow: auto;
}

.ypt-calc-history-empty {
  border: 1px dashed rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  padding: 12px;
  font-size: 12px;
  color: #9ca3af;
  text-align: center;
}

.ypt-calc-history-card {
  width: 100%;
  border: 1px solid #4b5056;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  color: #edf2f7;
  padding: 8px 10px;
  text-align: left;
  transition: border-color 120ms ease, background-color 120ms ease;
}

.ypt-calc-history-card:hover {
  border-color: #8aaea8;
  background: rgba(138, 174, 168, 0.08);
}

.ypt-calc-history-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.ypt-calc-history-expression {
  font-size: 11px;
  color: #c5ced8;
  word-break: break-word;
}

.ypt-calc-history-mode {
  font-size: 10px;
  color: #8d98a5;
  white-space: nowrap;
}

.ypt-calc-history-result {
  margin-top: 4px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
  font-weight: 600;
  color: #ffffff;
}

.ypt-calc-mode-panel {
  border: 1px solid #4b5056;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  padding: 10px;
}

.ypt-calc-mode-head {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #cbd5e1;
}

.ypt-calc-mode-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.ypt-calc-mode-btn {
  appearance: none;
  border: 1px solid #59616b;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: #e5e7eb;
  padding: 6px 10px;
  font-size: 11px;
  font-weight: 600;
  transition:
    border-color 120ms ease,
    color 120ms ease,
    background-color 120ms ease;
}

.ypt-calc-mode-btn:hover,
.ypt-calc-mode-btn.is-active {
  border-color: #8aaea8;
  color: #dff0ec;
  background: rgba(136, 169, 163, 0.14);
}

.ypt-calc-keypad {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.ypt-calc-key {
  min-height: 56px;
  border-radius: 12px;
  border: 1px solid #1a1f24;
  padding: 7px 8px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  transition:
    transform 120ms ease,
    border-color 120ms ease,
    filter 120ms ease;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.05),
    0 3px 0 rgba(0, 0, 0, 0.24);
}

.ypt-calc-key:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

.ypt-calc-key--number {
  background: linear-gradient(180deg, #555a61 0%, #3f444b 100%);
  color: #f8fafc;
}

.ypt-calc-key--function {
  background: linear-gradient(180deg, #353a40 0%, #282d33 100%);
  color: #f8fafc;
}

.ypt-calc-key--utility {
  background: linear-gradient(180deg, #2f3438 0%, #23272c 100%);
  color: #e5e7eb;
}

.ypt-calc-key--operator {
  background: linear-gradient(180deg, #444952 0%, #31363d 100%);
  color: #f8fafc;
}

.ypt-calc-key--equals {
  background: linear-gradient(180deg, #5b7da8 0%, #40628e 100%);
  border-color: #355276;
  color: #ffffff;
}

.ypt-calc-key--active {
  border-color: #9dc9c1;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 0 0 1px rgba(157, 201, 193, 0.32),
    0 3px 0 rgba(0, 0, 0, 0.24);
}

.ypt-calc-key-secondary {
  font-size: 10px;
  line-height: 1;
  color: #d8b468;
}

.ypt-calc-key-label {
  font-size: 17px;
  line-height: 1;
  font-weight: 600;
}

.ypt-calc-key-label--small {
  font-size: 13px;
}

.ypt-graph-shell {
  border: 1px solid #e5e2dc;
  border-radius: 24px;
  background: #ffffff;
  overflow: hidden;
}

.ypt-graph-workspace {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  min-height: 620px;
}

.ypt-graph-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px;
  background: #fbfaf7;
  border-right: 1px solid #ece7df;
  min-width: 0;
}

.ypt-graph-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.ypt-graph-section-title {
  font-size: 12px;
  font-weight: 600;
  color: #1f2937;
}

.ypt-graph-section-copy {
  font-size: 11px;
  color: #9ca3af;
}

.ypt-graph-pill-btn,
.ypt-graph-icon-btn,
.ypt-graph-toolbar-btn,
.ypt-graph-add-btn {
  appearance: none;
  border: 1px solid #d8d2c8;
  background: #ffffff;
  color: #475569;
  transition:
    border-color 120ms ease,
    color 120ms ease,
    background-color 120ms ease;
}

.ypt-graph-pill-btn:hover,
.ypt-graph-icon-btn:hover,
.ypt-graph-toolbar-btn:hover,
.ypt-graph-add-btn:hover {
  border-color: #88a9a3;
  color: #356860;
  background: #f4faf8;
}

.ypt-graph-add-btn {
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 11px;
  font-weight: 600;
}

.ypt-graph-expression-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ypt-graph-row {
  border: 1px solid #e5e2dc;
  border-radius: 16px;
  background: #ffffff;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

.ypt-graph-row.is-selected {
  border-color: #88a9a3;
  background: #f8fcfb;
  box-shadow: 0 0 0 1px rgba(136, 169, 163, 0.24);
}

.ypt-graph-row.is-disabled {
  opacity: 0.7;
}

.ypt-graph-row-top {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr) auto auto auto;
  align-items: center;
  gap: 8px;
}

.ypt-graph-visibility {
  width: 18px;
  height: 18px;
  border-radius: 999px;
  border: 1px solid currentColor;
  padding: 0;
}

.ypt-graph-visibility.is-on {
  background: currentColor;
}

.ypt-graph-visibility.is-off {
  background: transparent;
  opacity: 0.45;
}

.ypt-graph-color-chip {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.08);
}

.ypt-graph-input {
  width: 100%;
  border: 1px solid #d8d2c8;
  border-radius: 10px;
  background: #ffffff;
  padding: 8px 10px;
  font-size: 13px;
  color: #0f172a;
}

.ypt-graph-input:focus {
  outline: none;
  border-color: #7ca7a0;
  box-shadow: 0 0 0 3px rgba(74, 124, 116, 0.08);
}

.ypt-graph-icon-btn {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
}

.ypt-graph-row-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 11px;
  color: #94a3b8;
}

.ypt-graph-row-error {
  font-size: 11px;
  color: #b45309;
}

.ypt-graph-table {
  margin-top: auto;
  border-top: 1px solid #ece7df;
  padding-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.ypt-graph-table-field label {
  display: block;
  margin-bottom: 4px;
  font-size: 11px;
  color: #94a3b8;
}

.ypt-graph-table-field input {
  width: 100%;
  border: 1px solid #d8d2c8;
  border-radius: 10px;
  background: #ffffff;
  padding: 7px 9px;
  font-size: 12px;
}

.ypt-graph-table-grid {
  border: 1px solid #e5e2dc;
  border-radius: 12px;
  overflow: hidden;
  background: #ffffff;
}

.ypt-graph-table-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ypt-graph-table-row + .ypt-graph-table-row {
  border-top: 1px solid #f1eee9;
}

.ypt-graph-table-row > div {
  padding: 7px 9px;
  font-size: 12px;
  color: #334155;
}

.ypt-graph-table-row--head > div {
  font-size: 11px;
  font-weight: 600;
  color: #64748b;
  background: #f8fafc;
}

.ypt-graph-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: #ffffff;
}

.ypt-graph-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid #ece7df;
}

.ypt-graph-toolbar-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.ypt-graph-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.ypt-graph-toolbar-btn {
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 11px;
  font-weight: 600;
}

.ypt-graph-toolbar-btn.is-active {
  border-color: #88a9a3;
  color: #356860;
  background: #eef6f4;
}

.ypt-graph-statusbar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  padding: 12px 14px 0;
}

.ypt-graph-status-card {
  border: 1px solid #ece7df;
  border-radius: 16px;
  background: #fcfbf8;
  padding: 10px 12px;
  min-width: 0;
}

.ypt-graph-status-label {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #94a3b8;
}

.ypt-graph-status-value {
  margin-top: 4px;
  font-size: 12px;
  color: #1f2937;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ypt-graph-range-controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  padding: 12px 14px;
  border-bottom: 1px solid #ece7df;
}

.ypt-graph-range-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 11px;
  color: #94a3b8;
}

.ypt-graph-range-field input {
  width: 100%;
  border: 1px solid #d8d2c8;
  border-radius: 10px;
  background: #ffffff;
  padding: 7px 9px;
  font-size: 12px;
  color: #0f172a;
}

.ypt-graph-viewport-wrap {
  position: relative;
  flex: 1;
  min-height: 540px;
  background:
    linear-gradient(180deg, #fdfdfb 0%, #faf9f5 100%);
}

.ypt-graph-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
}

.ypt-graph-trace-pill {
  position: absolute;
  pointer-events: none;
  transform: translate(12px, -110%);
  border: 1px solid #d8d2c8;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.94);
  padding: 6px 8px;
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.08);
  max-width: 220px;
}

.ypt-graph-trace-title {
  font-size: 11px;
  color: #64748b;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ypt-graph-trace-value {
  margin-top: 2px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  color: #0f172a;
}

.ypt-graph-empty {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: #94a3b8;
  text-align: center;
  padding: 24px;
}

@media (max-width: 960px) {
  .ypt-graph-workspace {
    grid-template-columns: 1fr;
  }

  .ypt-graph-panel {
    border-right: none;
    border-bottom: 1px solid #ece7df;
  }

  .ypt-graph-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .ypt-graph-statusbar,
  .ypt-graph-range-controls {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .lerna-main {
    min-height: 100dvh;
    padding-top: var(--lerna-mobile-top-offset);
    padding-bottom: var(--lerna-mobile-bottom-offset);
  }

  .lerna-main--planner {
    height: calc(100dvh - var(--lerna-mobile-top-offset) - var(--lerna-mobile-bottom-offset));
    margin-top: var(--lerna-mobile-top-offset);
    margin-bottom: var(--lerna-mobile-bottom-offset);
    padding-top: 0;
    padding-bottom: 0;
  }

  .lerna-main-inner {
    padding: 20px 16px 24px;
  }

  .lerna-progress-summary,
  .lerna-progress-layout {
    grid-template-columns: 1fr;
  }

  .lerna-panel-page.lerna-panel-page,
  .lerna-progress-page.lerna-progress-page,
  .lerna-deck-detail {
    max-width: none;
  }

  .lerna-study-card.lerna-study-card {
    max-width: 100%;
    min-height: 17rem;
    padding: 32px 24px;
  }

  .lerna-desktop-brand {
    justify-content: center;
  }

  .ypt-tool-home-grid {
    grid-template-columns: 1fr;
  }

  .ypt-tool-workspace-head {
    flex-wrap: wrap;
    align-items: flex-start;
  }

  .ypt-calc-shell,
  .ypt-graph-shell {
    border-radius: 20px;
  }

  .ypt-calc-device {
    max-width: none;
  }

  .ypt-calc-keypad {
    gap: 6px;
  }

  .ypt-calc-key {
    min-height: 52px;
  }

  .ypt-graph-row-top {
    grid-template-columns: auto auto minmax(0, 1fr) auto auto;
  }

  .ypt-graph-row-top .ypt-graph-icon-btn:last-child {
    display: none;
  }

  .ypt-graph-table-controls,
  .ypt-graph-statusbar,
  .ypt-graph-range-controls {
    grid-template-columns: 1fr;
  }
}

/* The @media (max-width:767px) block here previously duplicated the rules in
   the 720px block above. Consolidated into the 720px block. Kept intentionally
   empty to preserve source line order for downstream diff reviewers. */

@media (min-width: 768px) {
  .lerna-mobile-topbar,
  .lerna-mobile-bottomnav,
  .lerna-mobile-sheet,
  .lerna-mobile-sheet-backdrop {
    display: none;
  }
}

/* =========================================================================
   Lerna mobile repair pass (2026-04-16) — in-place hygiene for the Capacitor
   WebView + mobile browsers. CSS-only. No class renames, no markup changes.
   Targets: tap response, safe areas, touch targets, input zoom, sheet scroll,
   backdrop-filter fallback, reduced-motion, focus visibility.
   ========================================================================= */

/* 1. Global mobile hygiene — prevent iOS text auto-resize, kill tap flash,
      lock overscroll bounce on the app shell, normalize touch response. */
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}
body {
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior-y: none;
}
.lerna-app-shell {
  overscroll-behavior: none;
}
button,
a,
[role="button"],
.lerna-mobile-topbar-action,
.lerna-mobile-sheet-link,
.lerna-mobile-sheet-close {
  touch-action: manipulation;
}

/* 2. iOS input-zoom guard — any input/textarea/select rendered on mobile
      must be ≥16px font-size to prevent Safari auto-zoom on focus. */
@media (max-width: 767px) {
  input,
  textarea,
  select {
    font-size: max(16px, 1rem);
  }
}

/* 3. Touch-target minimums (WCAG AA 44x44). Applied only on mobile so we
      don't enlarge desktop affordances. */
@media (max-width: 767px) {
  .lerna-mobile-topbar-action,
  .lerna-mobile-sheet-close {
    min-width: 44px;
    min-height: 44px;
  }
  .lerna-mobile-bottomnav {
    min-height: calc(56px + var(--lerna-safe-bottom));
  }
  .lerna-mobile-bottomnav > * {
    min-height: 48px;
  }
}

/* 4. Mobile sheet — cap height and allow internal scroll on short devices,
      keep backdrop from eating background scroll, add -webkit fallback. */
.lerna-mobile-sheet {
  max-height: calc(100dvh - var(--lerna-safe-top) - 24px);
  overflow: hidden;
}
.lerna-mobile-sheet-panel {
  max-height: calc(100dvh - var(--lerna-safe-top) - 40px);
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}
.lerna-mobile-sheet-backdrop {
  overscroll-behavior: contain;
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}
.lerna-mobile-topbar {
  -webkit-backdrop-filter: blur(18px);
}
.lerna-mobile-bottomnav {
  -webkit-backdrop-filter: blur(16px);
}

/* 5. Focus visibility — keep a calm outline for keyboard users in the
      Capacitor WebView without adding desktop hover noise. */
.lerna-mobile-topbar-action:focus-visible,
.lerna-mobile-sheet-link:focus-visible,
.lerna-mobile-sheet-close:focus-visible {
  outline: 2px solid var(--lerna-brand-strong);
  outline-offset: 2px;
}

/* 6. Reduced motion — honor OS setting; the sheet-link lift is the only
      movement motion that can be disabled safely. */
@media (prefers-reduced-motion: reduce) {
  .lerna-mobile-sheet-link,
  .lerna-mobile-sheet-link:hover,
  .lerna-mobile-sheet-link.is-active {
    transition: none;
    transform: none;
  }
}

/* 7. Landscape phones — suppress hover lift which flickers on touch,
      and tighten main padding so topbar/bottomnav don't starve content. */
@media (max-width: 767px) and (hover: none) {
  .lerna-mobile-sheet-link:hover {
    transform: none;
  }
}
@media (max-width: 767px) and (orientation: landscape) {
  .lerna-main-inner {
    padding: 14px 16px 20px;
  }
}

.lerna-plan-month-frame {
  border: 1px solid #e5e2dc;
  border-radius: 24px;
  background: linear-gradient(180deg, #fffefe 0%, #f8f6f1 100%);
  overflow: hidden;
}

.lerna-plan-month-weekdays {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0;
  padding: 14px 10px 10px;
  border-bottom: 1px solid #efeae2;
  background: rgba(255, 255, 255, 0.88);
}

.lerna-plan-month-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 10px;
  padding: 10px;
}

.lerna-plan-month-blank {
  min-height: 118px;
}

.lerna-plan-month-card {
  min-height: 118px;
  display: flex;
  flex-direction: column;
  text-align: left;
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid #ece7df;
  padding: 10px;
  background: #fffdf9;
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease,
    transform 180ms ease;
}

.lerna-plan-month-card:hover {
  border-color: #cfdcd7;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
  transform: translateY(-1px);
}

.lerna-plan-month-card.is-selected {
  border-color: #4a7c74;
  box-shadow: 0 0 0 1px rgba(74, 124, 116, 0.12);
}

.lerna-plan-month-card.is-today {
  background:
    linear-gradient(180deg, rgba(240, 247, 245, 0.95) 0%, rgba(255, 253, 249, 0.98) 100%);
}

.lerna-plan-month-density-0 {
  background: #fffdf9;
}

.lerna-plan-month-density-1 {
  background:
    linear-gradient(180deg, rgba(240, 247, 245, 0.42) 0%, rgba(255, 253, 249, 0.98) 100%);
}

.lerna-plan-month-density-2 {
  background:
    linear-gradient(180deg, rgba(224, 240, 236, 0.58) 0%, rgba(255, 253, 249, 0.98) 100%);
}

.lerna-plan-month-density-3 {
  background:
    linear-gradient(180deg, rgba(204, 228, 221, 0.82) 0%, rgba(255, 253, 249, 0.98) 100%);
}

.lerna-plan-month-density-4 {
  background:
    linear-gradient(180deg, rgba(180, 212, 202, 0.96) 0%, rgba(252, 249, 243, 1) 100%);
}

@media (max-width: 767px) {
  .lerna-plan-month-weekdays {
    padding: 10px 6px 8px;
  }

  .lerna-plan-month-grid {
    gap: 6px;
    padding: 6px;
  }

  .lerna-plan-month-blank,
  .lerna-plan-month-card {
    min-height: 78px;
  }

  .lerna-plan-month-card {
    padding: 7px 6px;
    border-radius: 14px;
  }

  .lerna-plan-month-card .lerna-month-mobile-hide,
  .lerna-plan-month-card .lerna-month-empty-label {
    display: none !important;
  }

  .lerna-plan-month-card .lerna-month-today-pill {
    white-space: nowrap;
    line-height: 1.1;
    font-size: 9px;
  }
}