.play-mode { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; border: 0; background: transparent; color: var(--muted); font-size: 13px; font-weight: 600; padding: 0; }
.offline-label { margin-right: auto; padding-left: 8px; color: var(--muted); font-size: 11px; }
.competitive { width: min(100%, 480px); margin: 0 auto; padding-top: 38px; flex: 1; min-height: 0; display: flex; flex-direction: column; }
html[data-play-mode="competitive"] .practice, html[data-play-mode="competitive"] .page-footer { display: none; }
html[data-play-mode="competitive"] .app-shell { height: 100dvh; min-height: 0; }
.competition-bar { display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 44px; flex: none; font-size: 13px; font-variant-numeric: tabular-nums; }
.comp-skip, .competition-back { flex: none; min-height: 44px; border: 0; background: transparent; padding: 4px 0; color: var(--accent); font-size: 13px; }
.comp-category { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.comp-filters:disabled .chevron { visibility: hidden; }
.competition-heading { margin: 0; font-size: 15px; font-weight: 550; }
.competition-stats { display: flex; gap: 12px; color: var(--muted); }
.competition-stats strong { color: var(--ink); font-weight: 600; }
.competition-body { display: flex; flex: 1; min-height: 0; flex-direction: column; gap: 10px; margin-inline: -8px; padding-bottom: max(8px, env(safe-area-inset-bottom)); }
.competition-card { flex: 1; min-height: 0; display: flex; flex-direction: column; justify-content: center; padding: 14px 10px; border: 0; border-radius: var(--card-radius); background: var(--surface); box-shadow: var(--card-shadow); text-align: center; overflow: clip; touch-action: pinch-zoom; }
.competition-card .operation { font-size: calc(32px * var(--user-formula-scale, 1) * var(--competitive-scale, 1)); padding: 0; line-height: 1.4; }
.competition-card .operation.is-symbolic { font-size: calc(27px * var(--user-formula-scale, 1) * var(--competitive-scale, 1)); }
.competition-card .exercise-domain { font-size: 14px; margin: 4px 0 0; }
.competition-precision { color: var(--muted); font-size: 12px; margin: 6px 0; }
.answer-editor { width: calc(100% - 24px); min-width: 0; margin: 20px auto 0; text-align: center; }
/* Reuse .result's size, colour and rhythm from Allenamento. */
math-field.answer-math { display: block; width: 100%; max-width: 100%; margin-inline: auto; border: 0; background: transparent; outline: 0; min-height: 44px; padding: 0; font-family: var(--font-text); --formula-scale: calc(var(--user-formula-scale, 1) * var(--competitive-scale, 1)); --caret-color: var(--accent); --selection-background-color: #dce4ff; --placeholder-color: #8c9bbc; --placeholder-opacity: 1; --contains-highlight-background-color: #eef1ff; --smart-fence-color: var(--accent); }
math-field.answer-math.is-symbolic { max-width: 100%; font-family: var(--font-math); font-weight: 400; --answer-number-font: var(--font-math); --answer-number-weight: 400; --answer-letter-spacing: normal; }
math-field.answer-math::part(container) { padding: 0; justify-content: center; }
math-field.answer-math::part(content) { padding: 2px 4px; text-align: center; justify-content: safe center; letter-spacing: inherit; }
math-field.answer-math::part(virtual-keyboard-toggle), math-field.answer-math::part(menu-toggle) { display: none; }
.input-position { display: block; color: var(--muted); font-size: 11px; min-height: 14px; margin-top: 2px; }
.competition-feedback { font-size: 14px; color: var(--muted); min-height: 22px; margin: 4px 0 0; }
.competition-feedback.is-correct { color: #18774d; }
.competition-feedback.is-incorrect { color: #c13d4e; }
.competition-answer { color: var(--accent); font-size: 25px; min-height: 0; }
.competition-answer math { max-width: 100%; }
.competition-answer math-field, .review-lines math-field { border: 0; background: transparent; max-width: 100%; font-size: calc(24px * var(--competitive-scale, 1)); }
.formula-keyboard { flex: none; display: flex; flex-direction: column; gap: 4px; height: 252px; padding: 4px 0 0; user-select: none; -webkit-user-select: none; }
.key-row { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 4px; flex: 1; min-height: 44px; }
.key-functions { grid-template-columns: repeat(6, minmax(0, 1fr)); flex: none; height: 44px; }
.key-row:has(.math-key[data-key="log"]), .key-row:has(.math-key[data-key="empty"]), .key-extra-bottom { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.math-key { min-width: 44px; min-height: 44px; border: 1px solid transparent; border-radius: 10px; background: #eef0f6; color: var(--ink); font-size: 23px; font-weight: 500; padding: 0; touch-action: manipulation; transition: background .1s, transform .1s; }
.key-function { color: #606b88; background: #e9edf6; font-size: 21px; }
.key-functions .math-key { font-size: 17px; }
.math-key:active { background: #dce4ff; transform: translateY(1px); }
.key-submit { background: var(--accent); color: white; }
.key-submit:active { background: var(--accent-dark); }
.math-key:disabled { opacity: .45; }
.keyboard-theme-tactile .math-key { background: white; border-color: #e2e6ee; box-shadow: 0 3px 0 #d6dce8, 0 4px 8px #20233008; border-radius: 13px; }
.keyboard-theme-tactile .key-function { background: #edf2ff; }
.keyboard-theme-tactile .key-submit { background: var(--accent); border-color: var(--accent); color: white; box-shadow: 0 3px 0 #1836ac; }
.keyboard-theme-tactile .math-key:active { transform: translateY(3px); box-shadow: none; }
.keyboard-theme-contrast .formula-keyboard { background: #202a40; padding: 6px; border-radius: 16px; height: 256px; }
.keyboard-theme-contrast .math-key { color: white; background: #334059; border-color: #46516a; border-radius: 8px; }
.keyboard-theme-contrast .key-function { background: #263248; color: #b5c8f7; }
.keyboard-theme-contrast .key-submit { background: #4266ff; border-color: #5878ff; }
.keyboard-theme-contrast .key-functions { gap: 2px; }
.competition-setup, .competition-summary { flex: 1; min-height: 0; }
.competition-setup { display: flex; flex-direction: column; margin-top: 32px; }
.competition-intro { flex: 1; min-height: 0; display: flex; flex-direction: column; justify-content: center; text-align: center; margin-inline: -8px; padding: 24px 16px; }
.competition-summary { overflow: auto; margin: 16px -8px max(16px, env(safe-area-inset-bottom)); padding: 28px 18px; text-align: center; }
.comp-loading:empty { display: none; }
.comp-loading { margin: 12px 0 0; }
.competition-title { font-size: 34px; letter-spacing: -.04em; margin: 0 0 12px; }
.competition-note { font-size: 15px; line-height: 1.6; color: var(--muted); margin: 0 0 20px; }
.competition-record { margin: 12px 0 20px; color: var(--muted); font-size: 14px; }
.competition-score { font-size: 64px; font-weight: 650; letter-spacing: -.05em; margin: 12px 0; }
.competition-review { list-style: none; margin: 24px 0; padding: 0; }
.competition-review details { padding: 12px 0; border-top: 1px solid var(--line); }
.competition-review summary { display: flex; gap: 12px; align-items: center; min-height: 44px; cursor: pointer; font-size: 18px; }
.review-state { color: #18774d; font-size: 16px; }
.review-state.wrong { color: #c13d4e; }
.review-lines { padding: 12px 6px; text-align: center; font-size: 20px; overflow-x: auto; }
.review-lines p { margin: 12px 0; }
.competition-secondary { display: block; color: var(--muted); margin: 12px auto 0; background: transparent; border: 0; min-height: 44px; font-size: 14px; }
@media (max-width: 640px) {
  .competitive { padding-top: 0; }
  .competition-stats { gap: 8px; font-size: 12px; }
  .competition-body { gap: 6px; }
}
@media (max-height: 650px) and (orientation: portrait) {
  .competition-card { padding-block: 6px; }
  .competition-card .operation, .competition-card .operation.is-symbolic { font-size: calc(23px * var(--competitive-scale, 1)); }
  .answer-editor { margin-top: 4px; }
  .formula-keyboard { height: 240px; }
  .competition-feedback { margin: 0; min-height: 18px; font-size: 12px; }
}
@media (orientation: landscape) and (max-height: 600px) {
  .competitive { position: relative; width: 100%; padding-top: 0; }
  html[data-ui="cards"] .competition-bar { margin-bottom: 0; }
  html[data-ui="cards"] .competition-controls { position: absolute; top: 0; left: 128px; right: 160px; margin: 0; }
  .competition-body { flex-direction: row; align-items: stretch; margin-inline: 0; }
  .competition-card { width: 45%; }
  .formula-keyboard { width: 52%; height: 100%; min-height: 236px; }
  html[data-play-mode="competitive"] .app-header { height: 48px; }
  .competition-setup { margin-top: 8px; }
  .competition-intro { padding-block: 12px; }
  .competition-intro .competition-title { font-size: 28px; margin-bottom: 6px; }
  .competition-intro .competition-note { margin-bottom: 0; }
  .competition-intro .competition-record { margin-block: 8px; }
}
@media (prefers-reduced-motion: reduce) { .math-key { transition: none; } }
@media (orientation: landscape) and (max-height: 350px) {
  html[data-play-mode="competitive"] .app-shell:has(#competition:is([data-phase="answering"], [data-phase="checking"], [data-phase="feedback"])) .app-header { display: none; }
}

/* A single, always available mode control, shared by both activities. */
.mode-line { width: min(100%, 480px); margin: 38px auto 14px; min-height: 44px; flex: none; display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.mode-toggle { position: relative; display: grid; grid-template-columns: 1fr 1fr; width: 208px; flex: none; height: 44px; padding: 3px; border-radius: 24px; background: var(--accent-soft); isolation: isolate; }
.mode-thumb { position: absolute; inset: 3px auto 3px 3px; width: calc(50% - 3px); border-radius: 22px; background: white; box-shadow: 0 2px 6px #20233012, 0 0 1px #20233012; transition: transform 220ms cubic-bezier(.2,.75,.25,1); z-index: -1; }
.mode-toggle[data-mode="competitive"] .mode-thumb { transform: translateX(100%); }
.mode-toggle button { min-height: 44px; margin-block: -3px; padding: 0 5px; border: 0; border-radius: 24px; color: var(--muted); background: transparent; font-size: 13px; font-weight: 600; white-space: nowrap; }
.mode-toggle button[aria-pressed="true"] { color: var(--accent); }
.mode-line .competition-stats { gap: 7px; font-size: 12px; white-space: nowrap; font-variant-numeric: tabular-nums; }
html[data-ui="cards"] .practice, html[data-ui="cards"] .competitive { padding-top: 0; }
.run-save-status { width: min(100%, 480px); margin: 0 auto 8px; font-size: 13px; line-height: 1.4; color: #a34032; }
.competition-controls > .current-category { overflow: hidden; white-space: nowrap; }
.comp-run-actions { display: flex; align-items: center; gap: 10px; flex: none; }
.comp-exit { min-height: 44px; padding: 0; border: 0; background: transparent; color: var(--muted); font-size: 12px; }
.comp-skip { min-width: 44px; }
.competition-setup { margin: 8px -8px 0; overflow: hidden; }
.run-setup-scroll { flex: 1; min-height: 0; overflow: auto; padding: 0 8px max(20px, env(safe-area-inset-bottom)); overscroll-behavior: contain; }
.run-setup-top { flex: none; padding: 0 8px 14px; background: var(--page); }
.run-setup-top .run-heading { padding: 4px 0 12px; }
.run-setup-top .primary-button { min-height: 52px; padding-block: 12px; }
.run-setup-top .comp-loading { margin: 8px 0 0; }
.run-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 4px 0 16px; }
.run-heading h1 { margin: 0; font-size: 30px; letter-spacing: -.04em; font-weight: 650; }
.run-heading h1 span { color: var(--accent); }
.run-history-link, .run-show-all { min-height: 44px; border: 0; padding: 0; color: var(--accent); background: transparent; font-size: 13px; }
.run-history-count:not(:empty) { display: inline-grid; place-items: center; min-width: 20px; height: 20px; margin-left: 3px; border-radius: 12px; background: var(--accent-soft); font-size: 12px; }
.run-section-heading { display: flex; align-items: center; justify-content: space-between; min-height: 44px; gap: 10px; }
.run-section-heading h2 { margin: 0; font-size: 16px; font-weight: 600; }
.run-section-heading > div { display: flex; gap: 12px; }
.run-section-heading button { min-height: 44px; border: 0; background: transparent; color: var(--muted); font-size: 13px; padding: 0; }
.run-selection-count { color: var(--muted); font-size: 12px; }
.run-categories { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-bottom: 18px; }
.run-category-row { position: relative; border-radius: 14px; background: #fff; box-shadow: inset 0 0 0 1px var(--line); }
.run-category-row.selected { background: var(--accent-soft); box-shadow: inset 0 0 0 1px #cbd5ff; }
.run-category { position: relative; display: flex; flex-direction: column; gap: 7px; align-items: flex-start; width: 100%; min-height: 80px; text-align: left; padding: 10px 12px; border: 0; border-radius: 14px; background: transparent; }
.run-category .category-symbol { width: 24px; height: 24px; font-size: 19px; background: transparent; justify-content: start; }
.run-category-name { font-size: 14px; font-weight: 550; line-height: 1.3; }
.run-category-check { position: absolute; top: 14px; right: 45px; font-size: 14px; color: var(--accent); }
.run-category-filters { position: absolute; top: 0; right: 0; width: 44px; height: 44px; border: 0; border-radius: 14px; padding: 0; background: transparent; color: var(--accent); font-size: 23px; }
.run-category-filters:disabled { visibility: hidden; }
.run-lengths { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-block: 4px 12px; }
.run-lengths button { min-height: 44px; border: 1px solid var(--line); border-radius: 12px; color: var(--ink); background: white; font-size: 16px; }
.run-lengths button[aria-pressed="true"] { border-color: #cbd5ff; color: var(--accent); background: var(--accent-soft); font-weight: 650; }
.run-lengths button:disabled { opacity: .35; }
.comp-start:disabled { opacity: .4; }
.saved-runs { margin-top: 24px; outline: none; scroll-margin-top: 8px; }
.run-empty { font-size: 14px; color: var(--muted); line-height: 1.5; margin: 8px 0; }
.saved-run { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; padding: 15px 0; border-bottom: 1px solid var(--line); }
.saved-run-copy { flex: 1; min-width: 140px; }
.saved-run-title { display: flex; flex-wrap: wrap; gap: 5px 8px; align-items: center; font-size: 14px; }
.saved-run-title strong { font-weight: 600; }
.run-badge { color: var(--accent); font-size: 12px; }
.run-badge.completed { color: var(--muted); }
.saved-run-meta { margin: 5px 0 0; color: var(--muted); font-size: 12px; line-height: 1.5; font-variant-numeric: tabular-nums; }
.saved-run-actions { display: flex; align-items: center; margin-left: auto; }
.saved-run-actions button { min-height: 44px; min-width: 44px; border: 0; background: transparent; border-radius: 10px; }
.saved-run-resume { font-size: 14px; color: var(--accent); font-weight: 600; }
.saved-run-delete { font-size: 22px; color: var(--muted); }
.run-delete-confirm { width: 100%; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; font-size: 14px; }
.run-delete-confirm button { min-height: 44px; border: 0; background: transparent; color: var(--accent); font-size: 14px; }
.run-delete-confirm button:last-child { color: #ba3842; }
@media (max-width: 640px) { .mode-line { margin-top: 0; margin-bottom: 8px; } .competition-setup { margin-top: 0; } }
@media (max-width: 350px) { .mode-toggle { width: 172px; } .mode-toggle button { font-size: 12px; padding-inline: 3px; } .run-category { padding-inline: 10px; } .run-heading h1 { font-size: 28px; } }
@media (max-height: 690px) and (max-width: 640px) { .mode-line { margin-bottom: 2px; } }
@media (orientation: landscape) and (max-height: 600px) {
  .mode-line { width: 100%; margin: 0 auto 8px; }
  .mode-toggle { width: 172px; } .mode-toggle button { font-size: 12px; }
  html[data-ui="cards"] .competition-controls { top: -52px; left: 184px; right: 110px; gap: 8px; }
  .competition-controls .category-symbol { display: none; }
  .competition-controls .comp-category { font-size: 12px; }
  .comp-run-actions { gap: 6px; }
  .competitive .competition-setup { margin-top: 0; }
  .run-categories { grid-template-columns: repeat(3,minmax(0,1fr)); }
}
@media (prefers-reduced-motion: reduce) { .mode-thumb { transition: none; } }

.app-shell > .update-notice { width: min(100%,480px); margin: 0 auto 8px; flex: none; }

@media (orientation: landscape) and (max-height: 600px) { .run-setup-top { display: grid; grid-template-columns: minmax(0,1fr) minmax(180px,.85fr); align-items: center; gap: 18px; padding-bottom: 10px; } .run-setup-top .run-heading { padding: 0; gap: 8px; } .run-setup-top .run-heading h1 { font-size: 24px; } }