/* Meimay full redesign — 2026-07-30
   Goals: immediate practice, low cognitive load, deep optional explanations. */
:root {
  color-scheme: light;
  --mmr-bg: #f5f7fa;
  --mmr-surface: #ffffff;
  --mmr-surface-2: #eef3f7;
  --mmr-surface-3: #e5edf3;
  --mmr-text: #17232d;
  --mmr-muted: #627381;
  --mmr-border: #ced9e1;
  --mmr-border-strong: #aebfca;
  --mmr-accent: #006f7f;
  --mmr-accent-hover: #005b69;
  --mmr-accent-soft: #def2f4;
  --mmr-accent-ink: #004b56;
  --mmr-good: #137a4d;
  --mmr-good-soft: #e1f4ea;
  --mmr-bad: #b23a3a;
  --mmr-bad-soft: #fbe9e7;
  --mmr-warning: #98620b;
  --mmr-warning-soft: #fff2d7;
  --mmr-shadow-sm: 0 1px 2px rgb(22 38 49 / 8%), 0 6px 18px rgb(22 38 49 / 5%);
  --mmr-shadow-md: 0 16px 44px rgb(22 38 49 / 13%);
  --mmr-radius-sm: 8px;
  --mmr-radius: 14px;
  --mmr-radius-lg: 20px;
  --mmr-header-h: 58px;
  --mmr-max: 1180px;
  --mmr-touch: 44px;
  --mmr-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
}

html[data-mm-theme="dark"] {
  color-scheme: dark;
  --mmr-bg: #0f171d;
  --mmr-surface: #172229;
  --mmr-surface-2: #1e2c35;
  --mmr-surface-3: #253742;
  --mmr-text: #edf5f7;
  --mmr-muted: #a6b8c3;
  --mmr-border: #344a57;
  --mmr-border-strong: #4b6472;
  --mmr-accent: #55c4cf;
  --mmr-accent-hover: #79d6de;
  --mmr-accent-soft: #173d44;
  --mmr-accent-ink: #a7edf1;
  --mmr-good: #65d19d;
  --mmr-good-soft: #193c2d;
  --mmr-bad: #ff8b83;
  --mmr-bad-soft: #492523;
  --mmr-warning: #f1bf65;
  --mmr-warning-soft: #483715;
  --mmr-shadow-sm: 0 1px 2px rgb(0 0 0 / 18%), 0 8px 24px rgb(0 0 0 / 16%);
  --mmr-shadow-md: 0 18px 50px rgb(0 0 0 / 35%);
}

html { scroll-behavior: smooth; background: var(--mmr-bg); }
body.mm-page {
  min-height: 100svh;
  margin: 0;
  background: var(--mmr-bg) !important;
  color: var(--mmr-text) !important;
  font-family: var(--mmr-font) !important;
  line-height: 1.55;
}
body.mm-page * { box-sizing: border-box; }
body.mm-page button,
body.mm-page input,
body.mm-page select,
body.mm-page textarea { font: inherit; }
body.mm-page a { color: inherit; }

/* Remove features explicitly retired in the approved specification. */
[data-mm-consent-banner],
[data-mm-consent-dialog],
[data-mm-consent-open],
[data-mm-content-info-dialog],
[data-mm-content-info-open],
[data-mm-report-dialog],
[data-mm-report-open],
.mm-world-banner,
.mm-ad-slot { display: none !important; }

/* Shared shell */
.mm-sitebar {
  position: sticky !important;
  inset-block-start: 0;
  z-index: 80;
  min-height: var(--mmr-header-h) !important;
  border: 0 !important;
  border-bottom: 1px solid var(--mmr-border) !important;
  background: color-mix(in srgb, var(--mmr-surface) 92%, transparent) !important;
  backdrop-filter: blur(14px);
  box-shadow: none !important;
}
.mm-sitebar__inner,
.mm-redesign-header {
  width: min(100%, calc(var(--mmr-max) + 40px));
  min-height: var(--mmr-header-h);
  margin-inline: auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
}
.mm-sitebar__inner > * { min-width: 0; }
.mm-sitebar__brand,
.mm-redesign-brand,
.mm-trainer-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: var(--mmr-touch);
  color: var(--mmr-text) !important;
  font-size: 1.08rem;
  font-weight: 780;
  letter-spacing: -.025em;
  text-decoration: none;
}
.mm-redesign-brand::before,
.mm-sitebar__brand::before {
  content: "";
  inline-size: 24px;
  block-size: 24px;
  flex: 0 0 auto;
  background: url('/assets/icons/meimay-mark.svg') center / contain no-repeat;
}
.mm-redesign-primary,
.mm-sitebar__primary {
  display: flex;
  align-items: center;
  gap: 4px;
}
.mm-redesign-primary a,
.mm-sitebar__primary a,
.mm-redesign-local-nav a {
  min-height: 38px;
  padding: 8px 11px;
  border-radius: 9px;
  color: var(--mmr-muted) !important;
  font-size: .9rem;
  font-weight: 650;
  text-decoration: none;
  white-space: nowrap;
}
.mm-redesign-primary a:hover,
.mm-sitebar__primary a:hover,
.mm-redesign-local-nav a:hover,
.mm-redesign-local-nav a[aria-current="page"] {
  background: var(--mmr-surface-2);
  color: var(--mmr-text) !important;
}
.mm-redesign-actions,
.mm-sitebar__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
}
.mm-redesign-icon-button,
.mm-redesign-language,
.mm-sitebar__language {
  min-width: var(--mmr-touch);
  min-height: var(--mmr-touch);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--mmr-muted) !important;
  font-weight: 650;
  text-decoration: none;
  cursor: pointer;
}
.mm-redesign-icon-button:hover,
.mm-redesign-language:hover,
.mm-sitebar__language:hover { background: var(--mmr-surface-2); color: var(--mmr-text) !important; }
.mm-redesign-icon-button svg { inline-size: 20px; block-size: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; }
.mm-redesign-menu { position: relative; }
.mm-redesign-menu > summary { list-style: none; }
.mm-redesign-menu > summary::-webkit-details-marker { display: none; }
.mm-redesign-menu__panel {
  position: absolute;
  inset-inline-end: 0;
  inset-block-start: calc(100% + 8px);
  z-index: 100;
  min-width: 210px;
  padding: 7px;
  border: 1px solid var(--mmr-border);
  border-radius: 12px;
  background: var(--mmr-surface);
  box-shadow: var(--mmr-shadow-md);
}
.mm-redesign-menu__panel a,
.mm-redesign-menu__panel button {
  width: 100%;
  min-height: 42px;
  padding: 9px 11px;
  display: flex;
  align-items: center;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--mmr-text);
  text-align: start;
  text-decoration: none;
  cursor: pointer;
}
.mm-redesign-menu__panel a:hover,
.mm-redesign-menu__panel button:hover { background: var(--mmr-surface-2); }
.mm-redesign-page-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .98rem; font-weight: 760; }
.mm-redesign-back { padding-inline: 6px 10px; }
.mm-redesign-back span { font-size: 1.25rem; line-height: 1; }

main#main-content {
  width: 100%;
  min-height: calc(100svh - var(--mmr-header-h) - 80px);
  color: var(--mmr-text);
}
.mm-site-footer {
  margin-top: 64px !important;
  border: 0 !important;
  border-top: 1px solid var(--mmr-border) !important;
  background: transparent !important;
  color: var(--mmr-muted) !important;
}
.mm-site-footer__inner {
  width: min(100%, calc(var(--mmr-max) + 40px));
  margin-inline: auto;
  padding: 24px 20px !important;
}
.mm-site-footer a { color: var(--mmr-muted) !important; }

/* Buttons and inputs */
body.mm-page button:not(.mm-redesign-icon-button):not(.mm-iupac-style-card),
body.mm-page .mm-button {
  border-radius: 10px;
}
body.mm-page input,
body.mm-page select,
body.mm-page textarea {
  border-color: var(--mmr-border) !important;
  background: var(--mmr-surface) !important;
  color: var(--mmr-text) !important;
}
body.mm-page input:focus,
body.mm-page select:focus,
body.mm-page textarea:focus,
body.mm-page button:focus-visible,
body.mm-page a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--mmr-accent) 40%, transparent) !important;
  outline-offset: 2px;
}

/* Home */
.mm-home {
  width: min(100%, calc(var(--mmr-max) + 40px));
  margin-inline: auto;
  padding: clamp(36px, 6vw, 76px) 20px 36px !important;
}
.mm-redesign-home-intro { max-width: 760px; margin-bottom: 34px; }
.mm-redesign-home-intro h1 { margin: 0 0 10px; font-size: clamp(2rem, 5vw, 3.6rem); line-height: 1.05; letter-spacing: -.05em; }
.mm-redesign-home-intro p { max-width: 630px; margin: 0; color: var(--mmr-muted); font-size: clamp(1rem, 1.8vw, 1.12rem); }
.mm-redesign-home-section { scroll-margin-top: calc(var(--mmr-header-h) + 20px); }
.mm-redesign-home-section + .mm-redesign-home-section { margin-top: 48px; }
.mm-redesign-home-section__heading { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin: 0 0 16px; }
.mm-redesign-home-section__heading h2 { margin: 0; font-size: 1.2rem; letter-spacing: -.02em; }
.mm-redesign-home-section__heading p { margin: 0; color: var(--mmr-muted); font-size: .9rem; }
.mm-tool-grid,
.mm-redesign-tool-grid {
  display: grid !important;
  grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
  gap: 14px !important;
  width: 100% !important;
  max-width: none !important;
  margin: 0 !important;
}
.mm-redesign-home-section--create .mm-redesign-tool-grid { grid-template-columns: minmax(0, 1fr) !important; max-width: 680px !important; }
.mm-tool-card {
  min-height: 176px !important;
  padding: 22px !important;
  display: grid !important;
  grid-template-columns: auto 1fr auto;
  align-items: start !important;
  gap: 16px !important;
  border: 1px solid var(--mmr-border) !important;
  border-radius: var(--mmr-radius-lg) !important;
  background: var(--mmr-surface) !important;
  box-shadow: var(--mmr-shadow-sm) !important;
  color: var(--mmr-text) !important;
  text-decoration: none;
  transform: none !important;
  transition: border-color .16s ease, box-shadow .16s ease, translate .16s ease !important;
}
.mm-tool-card:hover { border-color: var(--mmr-accent) !important; box-shadow: var(--mmr-shadow-md) !important; translate: 0 -2px; }
.mm-tool-card__icon {
  inline-size: 50px !important;
  block-size: 50px !important;
  display: grid !important;
  place-items: center;
  border-radius: 14px;
  background: var(--mmr-accent-soft) !important;
  color: var(--mmr-accent-ink) !important;
}
.mm-tool-card__icon svg { inline-size: 31px !important; block-size: 31px !important; stroke: currentColor !important; fill: none !important; }
.mm-tool-card__copy { align-self: center; }
.mm-tool-card__copy strong { display: block; margin-bottom: 6px; font-size: 1.12rem !important; letter-spacing: -.02em; }
.mm-tool-card__copy small { display: block; color: var(--mmr-muted) !important; font-size: .92rem !important; line-height: 1.55; }
.mm-tool-card__arrow { align-self: center; color: var(--mmr-accent); font-size: 1.4rem; }

/* Trainer common */
.mm-iupac-app,
.mm-spectrum-app,
.mm-arrow-app,
.mm-records,
.mm-glossary {
  width: min(100%, calc(var(--mmr-max) + 40px)) !important;
  max-width: none !important;
  margin-inline: auto !important;
  padding: 24px 20px 44px !important;
}
.mm-redesign-trainer-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 16px;
  padding: 4px;
  width: fit-content;
  border: 1px solid var(--mmr-border);
  border-radius: 11px;
  background: var(--mmr-surface);
}
.mm-redesign-trainer-nav a { min-height: 36px; padding: 7px 12px; border-radius: 7px; color: var(--mmr-muted); font-size: .88rem; font-weight: 680; text-decoration: none; }
.mm-redesign-trainer-nav a:hover,
.mm-redesign-trainer-nav a[aria-current="page"] { background: var(--mmr-accent-soft); color: var(--mmr-accent-ink); }

/* IUPAC */
.mm-iupac-app { display: flex !important; flex-direction: column; gap: 14px !important; }
.mm-iupac-setup { display: contents !important; }
.mm-trainer-toolbar { display: none !important; }
.mm-iupac-question-card {
  order: 1;
  width: min(100%, 920px) !important;
  margin-inline: auto !important;
  padding: clamp(16px, 3vw, 26px) !important;
  border: 1px solid var(--mmr-border) !important;
  border-radius: var(--mmr-radius-lg) !important;
  background: var(--mmr-surface) !important;
  box-shadow: var(--mmr-shadow-sm) !important;
}
.mm-redesign-iupac-toolbar {
  order: 0;
  width: min(100%, 920px);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.mm-redesign-condition-button {
  min-height: 42px;
  max-width: 55%;
  padding: 8px 12px !important;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--mmr-border) !important;
  background: var(--mmr-surface) !important;
  color: var(--mmr-text) !important;
  box-shadow: none !important;
  cursor: pointer;
}
.mm-redesign-condition-button span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mm-redesign-condition-button::before { content: "⚙"; color: var(--mmr-accent); }
.mm-iupac-learning-style {
  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  background: transparent !important;
}
.mm-iupac-learning-style__heading { display: none !important; }
.mm-iupac-style-grid,
.mm-iupac-style-grid--two {
  display: inline-flex !important;
  gap: 3px !important;
  padding: 3px !important;
  border: 1px solid var(--mmr-border) !important;
  border-radius: 10px !important;
  background: var(--mmr-surface) !important;
}
.mm-iupac-style-card {
  min-height: 34px !important;
  padding: 6px 10px !important;
  border: 0 !important;
  border-radius: 7px !important;
  background: transparent !important;
  color: var(--mmr-muted) !important;
  box-shadow: none !important;
  cursor: pointer;
}
.mm-iupac-style-card strong { font-size: .86rem; }
.mm-iupac-style-card span { display: none !important; }
.mm-iupac-style-card[aria-pressed="true"],
.mm-iupac-style-card.is-active { background: var(--mmr-accent-soft) !important; color: var(--mmr-accent-ink) !important; }
.mm-iupac-prompt { margin: 0 0 6px !important; color: var(--mmr-muted) !important; font-size: .9rem !important; font-weight: 650; }
.mm-iupac-structure {
  min-height: clamp(210px, 38vh, 360px) !important;
  max-height: 42vh !important;
  margin: 0 !important;
  padding: 4px !important;
  display: grid !important;
  place-items: center;
  overflow: hidden;
  border: 0 !important;
  background: transparent !important;
}
.mm-iupac-structure canvas,
.mm-iupac-structure svg { max-width: 100% !important; max-height: 40vh !important; }
.mm-iupac-stepwise { margin-top: 8px !important; }
.mm-iupac-stepwise__header { margin-bottom: 10px !important; }
.mm-iupac-stepwise__header h2 { margin: 3px 0 0 !important; font-size: clamp(1rem, 2vw, 1.18rem) !important; }
.mm-iupac-stepwise__count { color: var(--mmr-muted) !important; font-size: .82rem; }
.mm-iupac-step-trail { display: none !important; }
.mm-iupac-step-options { display: grid !important; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px !important; }
.mm-iupac-step-options button { min-height: 48px !important; padding: 10px 12px !important; border: 1px solid var(--mmr-border) !important; background: var(--mmr-surface-2) !important; color: var(--mmr-text) !important; box-shadow: none !important; }
.mm-iupac-step-options button:hover { border-color: var(--mmr-accent) !important; }
.mm-iupac-step-feedback { min-height: 0 !important; margin: 10px 0 0 !important; padding: 0 !important; }
.mm-iupac-answer-form { margin-top: 10px !important; }
.mm-iupac-answer-form label { color: var(--mmr-text) !important; font-weight: 680; }
.mm-iupac-answer-form input { min-height: 48px !important; font-size: 1rem; }
.mm-iupac-answer-actions {
  position: sticky;
  z-index: 20;
  inset-block-end: max(8px, env(safe-area-inset-bottom));
  margin-top: 10px !important;
  padding: 8px !important;
  display: flex !important;
  gap: 8px !important;
  border: 1px solid var(--mmr-border);
  border-radius: 12px;
  background: color-mix(in srgb, var(--mmr-surface) 94%, transparent);
  backdrop-filter: blur(12px);
  box-shadow: var(--mmr-shadow-sm);
}
.mm-iupac-answer-actions button { flex: 1; min-height: 44px; }
.mm-iupac-result { margin: 12px 0 0 !important; font-weight: 750; }
.mm-iupac-feedback { margin-top: 12px !important; }
.mm-iupac-feedback details { border: 1px solid var(--mmr-border) !important; border-radius: 10px !important; background: var(--mmr-surface-2) !important; }
.mm-redesign-confirm-panel { display: none; margin-top: 12px; }
[data-mm-confirm-mode="true"] .mm-iupac-stepwise,
[data-mm-confirm-mode="true"] .mm-iupac-answer-form,
[data-mm-confirm-mode="true"] .mm-iupac-hint,
[data-mm-confirm-mode="true"] .mm-iupac-result,
[data-mm-confirm-mode="true"] .mm-iupac-feedback { display: none !important; }
[data-mm-confirm-mode="true"] .mm-redesign-confirm-panel { display: block; }
.mm-redesign-confirm-reveal {
  width: 100%;
  min-height: 50px;
  border: 1px solid var(--mmr-accent) !important;
  background: var(--mmr-accent-soft) !important;
  color: var(--mmr-accent-ink) !important;
  font-weight: 760;
}
.mm-redesign-confirm-answer { margin-top: 12px; padding: 16px; border: 1px solid var(--mmr-border); border-radius: 12px; background: var(--mmr-surface-2); }
.mm-redesign-confirm-answer strong { display: block; font-size: clamp(1.05rem, 2.2vw, 1.28rem); overflow-wrap: anywhere; }
.mm-redesign-confirm-actions { display: flex; gap: 8px; margin-top: 12px; }
.mm-redesign-confirm-actions button { flex: 1; min-height: 44px; }

/* Native settings drawer */
.mm-redesign-drawer {
  width: min(520px, 100%);
  max-width: none;
  height: 100dvh;
  max-height: none;
  margin: 0 0 0 auto;
  padding: 0;
  border: 0;
  border-left: 1px solid var(--mmr-border);
  background: var(--mmr-surface);
  color: var(--mmr-text);
  box-shadow: var(--mmr-shadow-md);
}
.mm-redesign-drawer::backdrop { background: rgb(10 18 24 / 42%); backdrop-filter: blur(2px); }
.mm-redesign-drawer__header { position: sticky; top: 0; z-index: 2; padding: 14px 18px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--mmr-border); background: var(--mmr-surface); }
.mm-redesign-drawer__header h2 { margin: 0; font-size: 1.05rem; }
.mm-redesign-drawer__body { padding: 18px; overflow: auto; }
.mm-redesign-drawer .mm-iupac-filter-panel { margin: 0 !important; padding: 0 !important; border: 0 !important; background: transparent !important; box-shadow: none !important; }
.mm-redesign-drawer .mm-iupac-filter-panel > h2,
.mm-redesign-drawer .mm-iupac-filter-panel > header { display: none !important; }
.mm-redesign-drawer .mm-iupac-filter-groups { display: grid !important; grid-template-columns: repeat(2, minmax(0, 1fr)) !important; gap: 7px !important; }
.mm-redesign-drawer .mm-iupac-filter-groups label { min-height: 42px; padding: 8px 9px; border: 1px solid var(--mmr-border); border-radius: 8px; background: var(--mmr-surface-2); }
.mm-redesign-drawer .mm-iupac-filter-actions { position: sticky; bottom: 0; padding-top: 12px; background: var(--mmr-surface); }

/* Spectrum */
.mm-spectrum-app { display: block !important; }
.mm-spectrum-hero {
  margin-bottom: 20px !important;
  padding: 0 !important;
  border: 0 !important;
  background: transparent !important;
}
.mm-spectrum-hero > p,
.mm-spectrum-hero > h1 + p { max-width: 680px; color: var(--mmr-muted) !important; }
.mm-spectrum-hero h1 { margin-bottom: 8px !important; font-size: clamp(1.65rem, 4vw, 2.4rem) !important; letter-spacing: -.04em; }
.mm-spectrum-mode-switch { display: grid !important; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px !important; margin-top: 22px !important; }
.mm-spectrum-mode-switch button {
  min-height: 108px !important;
  padding: 18px !important;
  border: 1px solid var(--mmr-border) !important;
  border-radius: 16px !important;
  background: var(--mmr-surface) !important;
  color: var(--mmr-text) !important;
  box-shadow: var(--mmr-shadow-sm) !important;
  text-align: start !important;
}
.mm-spectrum-mode-switch button[aria-pressed="true"] { border-color: var(--mmr-accent) !important; background: var(--mmr-accent-soft) !important; color: var(--mmr-accent-ink) !important; }
.mm-spectrum-course-selector,
.mm-spectrum-drill,
.mm-spectrum-analysis,
.mm-spectrum-course-player { border-color: var(--mmr-border) !important; border-radius: var(--mmr-radius-lg) !important; background: var(--mmr-surface) !important; box-shadow: var(--mmr-shadow-sm) !important; }
.mm-spectrum-course-intro { padding: clamp(16px, 3vw, 26px) !important; }
.mm-spectrum-course-grid { gap: 10px !important; }
.mm-spectrum-course-heading { align-items: end !important; gap: 12px; }
.mm-spectrum-course-heading select { min-height: 42px; }
.mm-spectrum-course-layout { grid-template-columns: minmax(0, 1fr) minmax(260px, 340px) !important; gap: 14px !important; }
.mm-spectrum-course-spectrum,
.mm-spectrum-course-question,
.mm-spectrum-course-explanation,
.mm-spectrum-course-sidebar,
.mm-spectrum-card,
.mm-spectrum-board,
.mm-spectrum-candidates,
.mm-spectrum-guided { border-color: var(--mmr-border) !important; background: var(--mmr-surface) !important; }
.mm-spectrum-modality-switch { display: flex !important; flex-wrap: wrap; gap: 5px !important; padding: 4px !important; border: 1px solid var(--mmr-border); border-radius: 11px; background: var(--mmr-surface-2); }
.mm-spectrum-modality-switch button { min-height: 38px; border: 0 !important; background: transparent !important; color: var(--mmr-muted) !important; box-shadow: none !important; }
.mm-spectrum-modality-switch button[aria-pressed="true"] { background: var(--mmr-surface) !important; color: var(--mmr-accent-ink) !important; box-shadow: var(--mmr-shadow-sm) !important; }
.mm-spectrum-drill .mm-spectrum-card { max-width: none !important; }
.mm-spectrum-analysis-style { display: grid !important; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px !important; }
.mm-spectrum-analysis-style button { min-height: 94px; border: 1px solid var(--mmr-border) !important; background: var(--mmr-surface-2) !important; color: var(--mmr-text) !important; }
.mm-spectrum-analysis-style button[aria-pressed="true"] { border-color: var(--mmr-accent) !important; background: var(--mmr-accent-soft) !important; color: var(--mmr-accent-ink) !important; }
.mm-spectrum-analysis-layout { grid-template-columns: minmax(0, 1.6fr) minmax(280px, .7fr) !important; gap: 14px !important; }
.mm-spectrum-course-explanation details > summary,
.mm-spectrum-resolution details > summary { cursor: pointer; }

/* Reaction mechanism */
.mm-arrow-app { display: block !important; }
.mm-arrow-hero { margin-bottom: 16px !important; padding: 0 !important; border: 0 !important; background: transparent !important; }
.mm-arrow-hero h1 { margin-bottom: 7px !important; font-size: clamp(1.65rem, 4vw, 2.4rem) !important; letter-spacing: -.04em; }
.mm-arrow-hero p { max-width: 720px; color: var(--mmr-muted) !important; }
.mm-arrow-course-view,
.mm-arrow-practice { border-color: var(--mmr-border) !important; border-radius: var(--mmr-radius-lg) !important; background: var(--mmr-surface) !important; box-shadow: var(--mmr-shadow-sm) !important; }
.mm-arrow-rules { display: none !important; }
.mm-redesign-arrow-help { margin-bottom: 14px; }
.mm-redesign-arrow-help details { border: 1px solid var(--mmr-border); border-radius: 12px; background: var(--mmr-surface-2); }
.mm-redesign-arrow-help summary { padding: 12px 14px; cursor: pointer; font-weight: 700; }
.mm-redesign-arrow-help__body { padding: 0 14px 14px; color: var(--mmr-muted); }
.mm-arrow-reasoning { margin: 0 0 12px !important; border-color: var(--mmr-border) !important; background: var(--mmr-surface-2) !important; }
.mm-arrow-practice-layout { grid-template-columns: minmax(0, 1.6fr) minmax(280px, .7fr) !important; gap: 14px !important; }
.mm-arrow-canvas-panel,
.mm-arrow-controls,
.mm-arrow-analysis section { border-color: var(--mmr-border) !important; background: var(--mmr-surface) !important; }
.mm-arrow-controls { position: sticky; top: calc(var(--mmr-header-h) + 14px); align-self: start; }
.mm-arrow-controls select { min-height: 44px; }
.mm-arrow-controls button { min-height: 42px; }
.mm-arrow-check,
[data-mm-arrow-check] { min-height: 48px !important; }
.mm-arrow-analysis { margin-top: 14px !important; }
.mm-arrow-analysis[hidden] { display: none !important; }

/* Studio — intentionally reduced to a focused drawing workspace */
body[data-mm-app="studio"] main#main-content { min-height: calc(100dvh - var(--mmr-header-h)); }
.mm-studio-app { width: 100% !important; max-width: none !important; margin: 0 !important; padding: 0 !important; }
.mm-studio-hero,
.mm-studio-commandbar,
.mm-studio-practice-panel,
.mm-studio-start,
.mm-studio-purpose-panel,
.mm-studio-workflow-panel,
.mm-studio-fragment-sync,
.mm-studio-recovery:not(.is-active),
.mm-studio-selection-inspector,
.mm-studio-property-editor { display: none !important; }
.mm-studio-workspace {
  min-height: calc(100dvh - var(--mmr-header-h)) !important;
  display: grid !important;
  grid-template-columns: 68px minmax(0, 1fr) 260px !important;
  gap: 0 !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: var(--mmr-bg) !important;
}
.mm-studio-sidebar--left,
.mm-studio-sidebar--right {
  position: relative !important;
  inset: auto !important;
  max-height: calc(100dvh - var(--mmr-header-h)) !important;
  overflow: auto !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: var(--mmr-surface) !important;
  box-shadow: none !important;
}
.mm-studio-sidebar--left { grid-column: 1; border-right: 1px solid var(--mmr-border) !important; padding: 8px !important; }
.mm-studio-sidebar--right { grid-column: 3; border-left: 1px solid var(--mmr-border) !important; padding: 12px !important; }
.mm-studio-center { grid-column: 2; grid-row: 1; min-width: 0; padding: 0 !important; background: var(--mmr-bg) !important; }
.mm-studio-sidebar--left > * { display: none !important; }
.mm-redesign-studio-palette { display: flex !important; flex-direction: column; gap: 5px; }
.mm-redesign-studio-tool {
  width: 50px;
  height: 48px;
  padding: 4px !important;
  display: grid !important;
  place-items: center;
  border: 1px solid transparent !important;
  background: transparent !important;
  color: var(--mmr-muted) !important;
  box-shadow: none !important;
  font-size: .72rem;
  line-height: 1.15;
  cursor: pointer;
}
.mm-redesign-studio-tool:hover,
.mm-redesign-studio-tool.is-active { border-color: var(--mmr-border) !important; background: var(--mmr-surface-2) !important; color: var(--mmr-text) !important; }
.mm-redesign-studio-tool__icon { display: block; font-size: 1.22rem; line-height: 1; }
.mm-redesign-studio-divider { height: 1px; margin: 4px 3px; background: var(--mmr-border); }
.mm-studio-sidebar--right > * { display: none !important; }
.mm-redesign-studio-export-panel { display: block !important; }
.mm-redesign-studio-export-panel h2 { margin: 0 0 12px; font-size: 1rem; }
.mm-redesign-studio-export-panel label { display: grid; gap: 5px; margin-bottom: 11px; color: var(--mmr-muted); font-size: .82rem; font-weight: 650; }
.mm-redesign-studio-export-panel input,
.mm-redesign-studio-export-panel select { width: 100%; min-height: 40px; }
.mm-redesign-studio-export-panel button { width: 100%; min-height: 44px; margin-top: 4px; }
.mm-redesign-studio-insert-dialog { width: min(480px, calc(100% - 24px)); border: 1px solid var(--mmr-border); border-radius: 16px; background: var(--mmr-surface); color: var(--mmr-text); box-shadow: var(--mmr-shadow-md); }
.mm-redesign-studio-insert-dialog::backdrop { background: rgb(10 18 24 / 45%); }
.mm-redesign-studio-insert-dialog form { display: grid; gap: 12px; }
.mm-redesign-studio-insert-dialog h2 { margin: 0; }
.mm-redesign-studio-dialog-actions { display: flex; justify-content: flex-end; gap: 8px; }
.mm-studio-center > :first-child,
.mm-studio-toolbar { border-color: var(--mmr-border) !important; background: var(--mmr-surface) !important; }
.mm-studio-canvas-wrap,
.mm-studio-canvas-shell { background: var(--mmr-surface-2) !important; }
.mm-studio-canvas { box-shadow: var(--mmr-shadow-md) !important; }

/* Records and glossary */
.mm-records > header,
.mm-glossary > header { margin-bottom: 18px; }
.mm-records h1,
.mm-glossary h1 { font-size: clamp(1.55rem, 3vw, 2.1rem); letter-spacing: -.035em; }
.mm-glossary-list { display: grid !important; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px !important; }
.mm-glossary-entry { border: 1px solid var(--mmr-border) !important; border-radius: 13px !important; background: var(--mmr-surface) !important; box-shadow: var(--mmr-shadow-sm); }
.mm-redesign-progress-filter { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 16px; }
.mm-redesign-progress-filter a { min-height: 38px; padding: 7px 11px; border: 1px solid var(--mmr-border); border-radius: 9px; background: var(--mmr-surface); color: var(--mmr-muted); font-size: .86rem; font-weight: 680; text-decoration: none; }
.mm-redesign-progress-filter a[aria-current="page"] { border-color: var(--mmr-accent); background: var(--mmr-accent-soft); color: var(--mmr-accent-ink); }

/* Generic states */
.is-correct,
.mm-is-correct { color: var(--mmr-good) !important; }
.is-wrong,
.mm-is-wrong { color: var(--mmr-bad) !important; }
.mm-notice-region { color: var(--mmr-text) !important; }

@media (max-width: 900px) {
  .mm-tool-grid,
  .mm-redesign-tool-grid { grid-template-columns: 1fr !important; }
  .mm-redesign-home-section--create .mm-redesign-tool-grid { max-width: none !important; }
  .mm-tool-card { min-height: 128px !important; }
  .mm-spectrum-course-layout,
  .mm-spectrum-analysis-layout,
  .mm-arrow-practice-layout { grid-template-columns: 1fr !important; }
  .mm-arrow-controls { position: static; }
  .mm-studio-workspace { grid-template-columns: 60px minmax(0, 1fr) !important; }
  .mm-studio-sidebar--right { display: none !important; }
}

@media (max-width: 680px) {
  :root { --mmr-header-h: 54px; }
  .mm-sitebar__inner,
  .mm-redesign-header { padding-inline: 8px; gap: 6px; grid-template-columns: minmax(0, 1fr) auto; }
  .mm-redesign-primary,
  .mm-sitebar__primary,
  .mm-redesign-local-nav { display: none !important; }
  .mm-redesign-brand::before,
  .mm-sitebar__brand::before { inline-size: 21px; block-size: 21px; }
  .mm-redesign-language,
  .mm-sitebar__language { padding-inline: 6px; font-size: .78rem; }
  .mm-redesign-page-title { font-size: .9rem; }
  .mm-home { padding: 30px 14px 24px !important; }
  .mm-redesign-home-intro { margin-bottom: 26px; }
  .mm-redesign-home-intro h1 { font-size: 2.25rem; }
  .mm-redesign-home-section__heading { align-items: start; flex-direction: column; gap: 3px; }
  .mm-tool-card { padding: 17px !important; min-height: 118px !important; grid-template-columns: auto 1fr auto; }
  .mm-tool-card__icon { inline-size: 44px !important; block-size: 44px !important; }
  .mm-iupac-app,
  .mm-spectrum-app,
  .mm-arrow-app,
  .mm-records,
  .mm-glossary { padding: 14px 10px 32px !important; }
  .mm-redesign-trainer-nav { width: 100%; overflow-x: auto; }
  .mm-redesign-trainer-nav a { flex: 1 0 auto; text-align: center; }
  .mm-redesign-iupac-toolbar { align-items: stretch; flex-direction: column; }
  .mm-redesign-condition-button { max-width: none; width: 100%; justify-content: center; }
  .mm-iupac-learning-style { width: 100%; }
  .mm-iupac-style-grid,
  .mm-iupac-style-grid--two { width: 100%; }
  .mm-iupac-style-card { flex: 1; }
  .mm-iupac-question-card { padding: 13px !important; border-radius: 15px !important; }
  .mm-iupac-structure { min-height: 220px !important; max-height: 37vh !important; }
  .mm-iupac-structure canvas,
  .mm-iupac-structure svg { max-height: 35vh !important; }
  .mm-iupac-step-options { grid-template-columns: 1fr !important; }
  .mm-iupac-answer-actions { inset-block-end: max(6px, env(safe-area-inset-bottom)); }
  .mm-redesign-drawer { width: 100%; border-left: 0; }
  .mm-redesign-drawer .mm-iupac-filter-groups { grid-template-columns: 1fr 1fr !important; }
  .mm-spectrum-hero > p { display: none; }
  .mm-spectrum-mode-switch { grid-template-columns: 1fr; }
  .mm-spectrum-mode-switch button { min-height: 76px !important; }
  .mm-spectrum-analysis-style { grid-template-columns: 1fr; }
  .mm-arrow-hero > p { display: none; }
  .mm-arrow-controls {
    position: sticky;
    z-index: 25;
    bottom: max(6px, env(safe-area-inset-bottom));
    padding: 10px !important;
    border: 1px solid var(--mmr-border) !important;
    border-radius: 14px !important;
    background: color-mix(in srgb, var(--mmr-surface) 95%, transparent) !important;
    backdrop-filter: blur(12px);
    box-shadow: var(--mmr-shadow-md) !important;
  }
  .mm-arrow-canvas-panel { min-height: 330px; }
  .mm-studio-workspace { grid-template-columns: 54px minmax(0, 1fr) !important; }
  .mm-studio-sidebar--left { padding: 4px !important; }
  .mm-redesign-studio-tool { width: 44px; height: 44px; font-size: .64rem; }
  .mm-glossary-list { grid-template-columns: 1fr !important; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}
/* Iteration fixes: compact trainer header and remove duplicate desktop nav. */
.mm-redesign-header { grid-template-columns: max-content minmax(0, 1fr) auto; }
.mm-redesign-back::before { display: none !important; }
.mm-redesign-back svg {
  inline-size: 20px;
  block-size: 20px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.mm-redesign-back span { font-size: .98rem; }
.mm-redesign-icon-button {
  border: 0 !important;
  background: transparent !important;
  color: var(--mmr-muted) !important;
  box-shadow: none !important;
}
.mm-redesign-icon-button:hover { background: var(--mmr-surface-2) !important; color: var(--mmr-text) !important; }
.mm-redesign-trainer-nav { display: none; }
@media (max-width: 680px) {
  .mm-redesign-header { grid-template-columns: minmax(0, 1fr) auto; }
  .mm-redesign-trainer-nav { display: flex; }
  .mm-redesign-back { min-width: 0; }
  .mm-redesign-back .mm-redesign-page-title { font-size: .92rem; }
}
/* Spectrum entry chooser */
.mm-redesign-spectrum-entry { max-width: 920px; margin: 22px auto 0; }
.mm-redesign-spectrum-entry header { margin-bottom: 18px; }
.mm-redesign-spectrum-entry h1 { margin: 0 0 7px; font-size: clamp(1.7rem,4vw,2.45rem); letter-spacing: -.04em; }
.mm-redesign-spectrum-entry p { margin: 0; color: var(--mmr-muted); }
.mm-redesign-spectrum-entry__grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; }
.mm-redesign-spectrum-entry__grid button {
  min-height: 176px; padding: 24px !important; display: grid; grid-template-columns: 1fr auto; align-content: center; gap: 8px 16px;
  border: 1px solid var(--mmr-border) !important; border-radius: 18px !important; background: var(--mmr-surface) !important; color: var(--mmr-text) !important;
  box-shadow: var(--mmr-shadow-sm) !important; text-align: start; cursor: pointer;
}
.mm-redesign-spectrum-entry__grid button:hover { border-color: var(--mmr-accent) !important; translate: 0 -2px; box-shadow: var(--mmr-shadow-md) !important; }
.mm-redesign-spectrum-entry__grid strong { font-size: 1.2rem; letter-spacing: -.02em; }
.mm-redesign-spectrum-entry__grid span { grid-column: 1; color: var(--mmr-muted); }
.mm-redesign-spectrum-entry__grid b { grid-column: 2; grid-row: 1 / span 2; align-self: center; color: var(--mmr-accent); font-size: 1.4rem; }
[data-mmr-spectrum-entry="true"] > :not(.mm-redesign-trainer-nav):not(.mm-redesign-spectrum-entry) { display: none !important; }

/* Studio iteration: truly minimal two-column editor */
.mm-studio-workspace { width: 100% !important; grid-template-columns: 68px minmax(0,1fr) !important; }
.mm-studio-sidebar--right { display: none !important; }
.mm-studio-center { grid-column: 2 !important; }
.mm-redesign-studio-insert-dialog .mm-redesign-studio-dialog-fields { display: grid; gap: 10px; }
.mm-redesign-studio-insert-dialog .mm-redesign-studio-dialog-fields > * { width: 100%; min-height: 42px; }
.mm-redesign-studio-insert-dialog label { display: grid; gap: 6px; color: var(--mmr-muted); font-size: .85rem; font-weight: 650; }
.mm-redesign-studio-help { margin: 0; color: var(--mmr-muted); }
.mm-studio-center [hidden] { display: none !important; }
.mm-studio-center button {
  border: 1px solid var(--mmr-border) !important; background: var(--mmr-surface) !important; color: var(--mmr-text) !important; box-shadow: none !important;
}
.mm-studio-center button:hover { border-color: var(--mmr-accent) !important; background: var(--mmr-surface-2) !important; }
.mm-studio-center select { min-height: 38px; }
@media (max-width: 680px) {
  .mm-redesign-spectrum-entry__grid { grid-template-columns: 1fr; }
  .mm-redesign-spectrum-entry__grid button { min-height: 132px; padding: 18px !important; }
  .mm-studio-workspace { grid-template-columns: 54px minmax(0,1fr) !important; }
}
/* Cleaner course cards and compact Studio palette. */
.mm-arrow-course-grid { display: grid !important; grid-template-columns: repeat(4,minmax(0,1fr)) !important; gap: 12px !important; }
.mm-arrow-course-card {
  min-height: 210px !important;
  padding: 18px !important;
  display: flex !important;
  flex-direction: column;
  border: 1px solid var(--mmr-border) !important;
  border-radius: 15px !important;
  background: var(--mmr-surface) !important;
  color: var(--mmr-text) !important;
  box-shadow: var(--mmr-shadow-sm) !important;
}
.mm-arrow-course-card > span { color: var(--mmr-accent) !important; font-size: .75rem !important; font-weight: 720; }
.mm-arrow-course-card h3 { margin: 13px 0 6px !important; color: var(--mmr-text) !important; }
.mm-arrow-course-card p { flex: 1; margin: 0 0 15px !important; color: var(--mmr-muted) !important; }
.mm-arrow-course-card button { min-height: 43px; border: 1px solid var(--mmr-accent) !important; background: var(--mmr-accent-soft) !important; color: var(--mmr-accent-ink) !important; box-shadow: none !important; }
.mm-redesign-studio-tool > span:last-child { display: none; }
.mm-redesign-studio-tool { width: 50px; height: 48px; }
.mm-redesign-studio-tool__icon { font-size: 1.25rem; }
@media (max-width: 1000px) { .mm-arrow-course-grid { grid-template-columns: repeat(2,minmax(0,1fr)) !important; } }
@media (max-width: 680px) {
  .mm-arrow-course-grid { grid-template-columns: 1fr !important; }
  .mm-arrow-course-card { min-height: 152px !important; }
  .mm-redesign-studio-tool { width: 44px; height: 44px; }
}
/* Mobile IUPAC: settings, structure, and current answer choices fit into one viewport where practical. */
@media (max-width: 680px) {
  .mm-redesign-iupac-toolbar { flex-direction: row; align-items: stretch; gap: 6px; }
  .mm-redesign-condition-button { width: 31%; min-width: 0; padding-inline: 7px !important; font-size: .82rem; }
  .mm-redesign-condition-button span { text-overflow: clip; }
  .mm-iupac-learning-style { width: 69%; min-width: 0; }
  .mm-iupac-style-card { min-width: 0; padding-inline: 5px !important; }
  .mm-iupac-style-card strong { font-size: .8rem; white-space: nowrap; }
  .mm-iupac-question-card { padding: 11px !important; }
  .mm-iupac-prompt { margin-bottom: 2px !important; font-size: .84rem !important; line-height: 1.4; }
  .mm-iupac-structure { min-height: 168px !important; max-height: 25vh !important; }
  .mm-iupac-structure canvas, .mm-iupac-structure svg { max-height: 24vh !important; }
  .mm-iupac-stepwise__header { margin-bottom: 6px !important; }
  .mm-iupac-stepwise__header h2 { font-size: .98rem !important; line-height: 1.4; }
  .mm-iupac-step-options { gap: 6px !important; }
  .mm-iupac-step-options button { min-height: 42px !important; padding: 7px 8px !important; font-size: .86rem; line-height: 1.35; }
}
/* Per-trainer review/history: one focused view at a time. */
.mm-redesign-progress-controls { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; margin: 18px 0; }
.mm-redesign-progress-tabs, .mm-redesign-progress-filter { display: flex; flex-wrap: wrap; gap: 6px; }
.mm-redesign-progress-tabs a, .mm-redesign-progress-filter a { min-height: 39px; display: inline-flex; align-items: center; padding: 0 13px; border: 1px solid var(--mmr-border); border-radius: 999px; background: var(--mmr-surface); color: var(--mmr-muted); text-decoration: none; font-size: .88rem; font-weight: 700; }
.mm-redesign-progress-tabs a[aria-current="page"], .mm-redesign-progress-filter a[aria-current="page"] { border-color: var(--mmr-accent); background: var(--mmr-accent-soft); color: var(--mmr-accent-ink); }
.mm-records-grid.mm-records-grid--single { grid-template-columns: minmax(0, 1fr) !important; }
.mm-redesign-filter-empty { margin-top: 12px; }
@media (max-width: 680px) { .mm-redesign-progress-controls { align-items: stretch; } .mm-redesign-progress-tabs, .mm-redesign-progress-filter { width: 100%; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 2px; } }
/* Deep, searchable glossary. */
.mm-glossary { max-width: 1080px !important; }
.mm-glossary > header { align-items: end !important; }
.mm-redesign-glossary-intro { max-width: 760px; margin: 7px 0 0; color: var(--mmr-muted); line-height: 1.75; }
.mm-glossary-list { display: grid !important; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px !important; }
.mm-redesign-glossary-entry { align-content: start; padding: 18px !important; border: 1px solid var(--mmr-border) !important; border-radius: 15px !important; background: var(--mmr-surface) !important; box-shadow: var(--mmr-shadow-sm) !important; }
.mm-redesign-glossary-entry__heading { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.mm-redesign-glossary-entry__heading strong { font-size: 1.08rem; }
.mm-redesign-glossary-entry__heading span { flex: 0 0 auto; padding: 3px 8px; border-radius: 999px; background: var(--mmr-accent-soft); color: var(--mmr-accent-ink); font-size: .72rem; font-weight: 750; }
.mm-redesign-glossary-definition { margin: 11px 0 13px !important; color: var(--mmr-text) !important; line-height: 1.7; }
.mm-redesign-glossary-details { border-top: 1px solid var(--mmr-border); padding-top: 10px; }
.mm-redesign-glossary-details summary { cursor: pointer; color: var(--mmr-accent-ink); font-weight: 750; }
.mm-redesign-glossary-details dl { margin: 12px 0 0; display: grid; gap: 10px; }
.mm-redesign-glossary-details dl > div { display: grid; gap: 3px; }
.mm-redesign-glossary-details dt { color: var(--mmr-muted); font-size: .75rem; font-weight: 800; text-transform: none; }
.mm-redesign-glossary-details dd { margin: 0; line-height: 1.65; }
.mm-redesign-glossary-misconception { padding: 9px 11px; border-left: 3px solid var(--mmr-warning, #b67500); background: color-mix(in srgb, var(--mmr-warning, #b67500) 7%, transparent); border-radius: 0 8px 8px 0; }
.mm-redesign-glossary-entry > small { display: block; margin-top: 12px; color: var(--mmr-muted); }
@media (max-width: 760px) { .mm-glossary-list { grid-template-columns: 1fr; } .mm-redesign-glossary-entry { padding: 15px !important; } }
/* Simplified site information. */
.mm-redesign-trust-hub { max-width: 1040px; margin: 0 auto; padding: 42px 22px 70px; }
.mm-redesign-trust-hub > header { margin-bottom: 34px; }
.mm-redesign-trust-hub > header > span { color: var(--mmr-accent-ink); font-size: .76rem; font-weight: 800; letter-spacing: .14em; }
.mm-redesign-trust-hub h1 { margin: 7px 0 10px; font-size: clamp(2rem,5vw,3.2rem); letter-spacing: -.05em; }
.mm-redesign-trust-hub > header p { max-width: 760px; color: var(--mmr-muted); line-height: 1.8; }
.mm-redesign-trust-hub > section { margin-top: 34px; }
.mm-redesign-trust-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; }
.mm-redesign-trust-grid article { padding: 18px; border: 1px solid var(--mmr-border); border-radius: 15px; background: var(--mmr-surface); }
.mm-redesign-trust-grid article p { color: var(--mmr-muted); line-height: 1.65; }
.mm-redesign-policy-links { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
.mm-redesign-policy-links a { display: grid; gap: 4px; padding: 16px; border: 1px solid var(--mmr-border); border-radius: 13px; background: var(--mmr-surface); color: var(--mmr-text); text-decoration: none; }
.mm-redesign-policy-links a:hover { border-color: var(--mmr-accent); }
.mm-redesign-policy-links span { color: var(--mmr-muted); font-size: .85rem; }
.mm-redesign-return-link { display: inline-flex; margin-top: 30px; font-weight: 750; }
@media (max-width: 760px) { .mm-redesign-trust-grid, .mm-redesign-policy-links { grid-template-columns: 1fr; } }

/* v2 completion pass ----------------------------------------------------- */
.mm-redesign-header-spacer { min-width: 0; }

/* IUPAC: compact summary, usable presets, and a high-contrast chemistry stage. */
.mm-redesign-condition-button {
  max-width: min(420px, 52%);
  display: grid !important;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 9px;
  row-gap: 0;
  text-align: start;
}
.mm-redesign-condition-button::before { grid-row: 1 / span 2; align-self: center; }
.mm-redesign-condition-button__label { font-size: .86rem; font-weight: 760; line-height: 1.25; }
.mm-redesign-condition-button small {
  min-width: 0;
  overflow: hidden;
  color: var(--mmr-muted);
  font-size: .72rem;
  font-weight: 600;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.mm-redesign-iupac-presets {
  margin: 0 0 18px;
  padding: 0 0 18px;
  border-bottom: 1px solid var(--mmr-border);
}
.mm-redesign-iupac-presets h3 { margin: 0 0 9px; font-size: .86rem; }
.mm-redesign-iupac-presets__grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 7px; }
.mm-redesign-iupac-presets__grid button {
  min-height: 42px;
  padding: 8px 10px !important;
  border: 1px solid var(--mmr-border) !important;
  background: var(--mmr-surface-2) !important;
  color: var(--mmr-text) !important;
  box-shadow: none !important;
  font-size: .84rem;
  font-weight: 700;
}
.mm-redesign-iupac-presets__grid button[aria-pressed] {
  border-color: var(--mmr-accent) !important;
  background: var(--mmr-accent-soft) !important;
  color: var(--mmr-accent-ink) !important;
}
.mm-iupac-structure {
  margin-block: 10px 14px !important;
  border-radius: 14px !important;
  background: #0e1521 !important;
  box-shadow: inset 0 0 0 1px rgb(255 255 255 / 7%);
}
html[data-mm-theme="dark"] .mm-iupac-structure { background: #0b111a !important; }
.mm-iupac-structure-svg { filter: contrast(1.08) saturate(1.08); }

/* Studio: a real viewport-filling editor rather than a long document. */
body[data-mm-app="studio"] { overflow: hidden; }
body[data-mm-app="studio"] .mm-site-footer { display: none !important; }
body[data-mm-app="studio"] main#main-content { min-height: 0; height: calc(100dvh - var(--mmr-header-h)); overflow: hidden; }
.mm-studio-app { height: 100% !important; overflow: hidden !important; }
.mm-studio-workspace {
  height: 100% !important;
  min-height: 0 !important;
  overflow: hidden !important;
}
.mm-studio-sidebar--left {
  height: 100% !important;
  max-height: none !important;
  overflow-x: hidden !important;
  overflow-y: auto !important;
}
.mm-studio-center {
  height: 100% !important;
  min-height: 0 !important;
  display: flex !important;
  flex-direction: column;
  overflow: hidden !important;
}
.mm-studio-toolbar,
.mm-studio-pagebar {
  flex: 0 0 auto;
  min-height: 48px;
  padding: 6px 10px !important;
  display: flex !important;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  overflow-y: hidden;
  border: 0 !important;
  border-bottom: 1px solid var(--mmr-border) !important;
  background: var(--mmr-surface) !important;
  scrollbar-width: thin;
}
.mm-studio-toolbar { justify-content: flex-start !important; }
.mm-studio-toolbar [data-mm-studio-autosave],
.mm-studio-pagebar__navigation,
.mm-studio-page-tabs,
.mm-studio-mobile-note,
.mm-studio-guidance,
.mm-studio-purpose-panel,
.mm-studio-workflow-panel,
[data-mm-studio-render-status],
[data-mm-studio-status] { display: none !important; }
.mm-studio-toolbar .mm-studio-button-row,
.mm-studio-viewport-controls {
  width: max-content;
  display: flex !important;
  flex-wrap: nowrap !important;
  align-items: center;
  gap: 6px !important;
}
.mm-studio-toolbar button,
.mm-studio-viewport-controls button {
  min-width: 42px;
  min-height: 38px !important;
  padding: 7px 11px !important;
  white-space: nowrap;
  font-size: .84rem;
  font-weight: 700;
}
.mm-studio-pagebar { justify-content: flex-end !important; }
.mm-studio-canvas-shell {
  min-height: 0 !important;
  height: auto !important;
  flex: 1 1 auto;
  overflow: auto !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: var(--mmr-surface-2) !important;
}
.mm-studio-canvas {
  margin: 18px !important;
  transform-origin: top left;
}
.mm-redesign-studio-tool {
  border-radius: 10px !important;
}
.mm-redesign-studio-tool__icon {
  font-family: var(--mmr-font);
  font-weight: 750;
}

@media (max-width: 680px) {
  .mm-redesign-condition-button {
    width: 36%;
    max-width: none;
    grid-template-columns: auto minmax(0,1fr);
    padding-inline: 8px !important;
  }
  .mm-redesign-condition-button small { display: none; }
  .mm-iupac-learning-style { width: 64%; }
  .mm-iupac-structure { min-height: 174px !important; max-height: 26vh !important; margin-block: 7px 9px !important; }
  .mm-studio-toolbar,
  .mm-studio-pagebar { min-height: 46px; padding: 4px 6px !important; }
  .mm-studio-toolbar button,
  .mm-studio-viewport-controls button { min-height: 38px !important; padding: 6px 9px !important; font-size: .78rem; }
  .mm-studio-canvas { margin: 10px !important; }
}
body[data-mm-app="iupac"] .mm-iupac-structure {
  background: #0e1521 !important;
}
html[data-mm-theme="dark"] body[data-mm-app="iupac"] .mm-iupac-structure {
  background: #0b111a !important;
}
/* Studio mobile toolbar remains horizontally reachable instead of clipping its last control. */
.mm-studio-viewport-controls { overflow-x: auto; overscroll-behavior-inline: contain; scrollbar-width: thin; }
.mm-studio-viewport-controls > * { flex: 0 0 auto; }
@media (max-width: 680px) {
  .mm-studio-commandbar, .mm-studio-pagebar { overflow-x: auto; }
  .mm-studio-viewport-controls { justify-content: flex-start !important; padding-inline: 6px; }
}

/* Spectrum integrated-analysis compaction */
.mm-spectrum-analysis-style { display: none !important; }
.mm-redesign-spectrum-stylebar {
  display: flex;
  align-items: center;
  gap: 5px;
  margin: 0 0 10px;
  padding: 4px;
  border: 1px solid var(--mmr-border);
  border-radius: 11px;
  background: var(--mmr-surface-2);
}
.mm-redesign-spectrum-stylebar > span {
  margin-inline: 8px 4px;
  color: var(--mmr-muted);
  font-size: .78rem;
  font-weight: 700;
  white-space: nowrap;
}
.mm-redesign-spectrum-stylebar button {
  min-height: 36px;
  padding: 6px 12px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--mmr-muted);
  font-weight: 720;
}
.mm-redesign-spectrum-stylebar button[aria-pressed="true"] {
  background: var(--mmr-surface);
  color: var(--mmr-accent-ink);
  box-shadow: var(--mmr-shadow-sm);
}
.mm-spectrum-analysis-head { margin-bottom: 10px !important; }
.mm-spectrum-analysis-head p { margin-bottom: 0 !important; }
.mm-spectrum-guided { padding: clamp(12px, 2vw, 18px) !important; }
.mm-spectrum-guided-heading { margin-bottom: 8px !important; }
.mm-spectrum-guided-heading p { margin: 3px 0 0 !important; }
.mm-spectrum-guided-trail {
  display: flex !important;
  gap: 6px !important;
  margin: 8px 0 12px !important;
  padding: 0 0 3px !important;
  overflow-x: auto;
  list-style: none !important;
  scrollbar-width: thin;
}
.mm-spectrum-guided-trail li {
  display: inline-flex !important;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
  min-height: 36px;
  padding: 5px 9px !important;
  border: 1px solid var(--mmr-border) !important;
  border-radius: 9px !important;
  background: var(--mmr-surface-2) !important;
  color: var(--mmr-muted) !important;
}
.mm-spectrum-guided-trail li > span {
  display: inline-grid;
  place-items: center;
  inline-size: 23px;
  block-size: 23px;
  border-radius: 50%;
  background: var(--mmr-surface);
  color: inherit;
  font-size: .72rem;
  font-weight: 800;
}
.mm-spectrum-guided-trail li > strong { font-size: .76rem; white-space: nowrap; }
.mm-spectrum-guided-trail li.is-current {
  border-color: var(--mmr-accent) !important;
  background: var(--mmr-accent-soft) !important;
  color: var(--mmr-accent-ink) !important;
}
.mm-spectrum-guided-trail li.is-locked { opacity: .68; }
.mm-spectrum-guided-task { padding-top: 2px !important; }

@media (max-width: 680px) {
  .mm-spectrum-analysis-head p,
  .mm-spectrum-guided-heading p { display: none; }
  .mm-redesign-spectrum-stylebar { position: sticky; top: calc(var(--mmr-header-h) + 4px); z-index: 5; }
  .mm-redesign-spectrum-stylebar > span { display: none; }
  .mm-redesign-spectrum-stylebar button { flex: 1; }
  .mm-spectrum-guided-trail li { min-width: 36px; justify-content: center; padding-inline: 6px !important; }
  .mm-spectrum-guided-trail li > strong { display: none; }
  .mm-spectrum-guided-trail li.is-current > strong { display: inline; }
}

/* Spectrum active-mode header */
.mm-spectrum-app[data-mmr-spectrum-entry="false"] .mm-spectrum-hero {
  margin: 0 0 10px !important;
}
.mm-spectrum-app[data-mmr-spectrum-entry="false"] .mm-spectrum-hero > div:first-child {
  display: none !important;
}
.mm-spectrum-app[data-mmr-spectrum-entry="false"] .mm-spectrum-mode {
  display: grid !important;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px !important;
  width: min(460px, 100%);
  margin: 0 !important;
  padding: 4px !important;
  border: 1px solid var(--mmr-border) !important;
  border-radius: 11px !important;
  background: var(--mmr-surface-2) !important;
}
.mm-spectrum-app[data-mmr-spectrum-entry="false"] .mm-spectrum-mode button {
  min-height: 38px !important;
  padding: 7px 10px !important;
  border: 0 !important;
  border-radius: 8px !important;
  background: transparent !important;
  color: var(--mmr-muted) !important;
  box-shadow: none !important;
  font-weight: 720 !important;
}
.mm-spectrum-app[data-mmr-spectrum-entry="false"] .mm-spectrum-mode button[aria-pressed="true"] {
  background: var(--mmr-surface) !important;
  color: var(--mmr-accent-ink) !important;
  box-shadow: var(--mmr-shadow-sm) !important;
}
@media (max-width: 680px) {
  .mm-spectrum-app[data-mmr-spectrum-entry="false"] .mm-spectrum-mode { width: 100%; }
}

/* Ensure only the selected compact spectrum mode is filled. */
.mm-redesign-spectrum-stylebar button {
  background: transparent !important;
  color: var(--mmr-muted) !important;
}
.mm-redesign-spectrum-stylebar button[aria-pressed="true"] {
  background: var(--mmr-accent) !important;
  color: #fff !important;
}

/* Reaction-mechanism touch canvas: fit the whole step while keeping generous hit targets. */
@media (max-width: 680px) {
  .mm-arrow-canvas {
    overflow: hidden !important;
    min-height: 0 !important;
  }
  .mm-arrow-canvas > svg {
    display: block;
    width: 100% !important;
    min-width: 0 !important;
    height: auto !important;
  }
  .mm-arrow-structure-card { min-height: 0 !important; }
}

.mm-redesign-brand__icon{width:30px;height:30px;object-fit:contain;flex:0 0 auto}.mm-redesign-brand{display:inline-flex!important;align-items:center;gap:9px}