:root {
  --paper: #f7f6f1;
  --surface: #ffffff;
  --ink: #183032;
  --ink-soft: #486062;
  --line: #dde4df;
  --ocean: #176b72;
  --ocean-dark: #0f4f55;
  --mint: #dff2e9;
  --sky: #e0eff3;
  --sand: #f7e8d2;
  --coral: #df7845;
  --coral-dark: #b95123;
  --lavender: #e9e5f7;
  --shadow: 0 14px 40px rgba(33, 63, 61, 0.08);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif;
  color-scheme: light;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
}

button, input, select { font: inherit; }
button { cursor: pointer; }
a { color: inherit; }

.skip-link {
  position: absolute;
  z-index: 10;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  border-radius: 0.5rem;
  color: white;
  background: var(--ocean-dark);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.app-shell {
  display: grid;
  min-height: 100vh;
  grid-template-columns: 272px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  padding: 1.5rem 1rem 1.25rem;
  color: #e9f2ef;
  background: var(--ink);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  width: fit-content;
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  width: 2.45rem;
  height: 2.45rem;
  place-items: center;
  border-radius: 0.78rem;
  color: #113b3e;
  background: #bfe8d8;
  font-size: 1.18rem;
  font-weight: 800;
}

.brand strong { display: block; font-size: 1.1rem; letter-spacing: 0.05em; }
.brand small { display: block; margin-top: -0.12rem; color: #afc1bc; font-size: 0.72rem; letter-spacing: 0.1em; }

.sidebar-nav {
  display: grid;
  gap: 0.2rem;
  margin-top: 2.15rem;
  overflow-y: auto;
  padding-bottom: 0.8rem;
}

.nav-group { display: grid; gap: 0.15rem; margin-bottom: 0.7rem; }
.nav-heading { margin: 0.55rem 0.65rem 0.25rem; color: #93aaa3; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.66rem;
  min-height: 2.35rem;
  padding: 0.48rem 0.65rem;
  border-radius: 0.62rem;
  color: #d8e6e2;
  text-decoration: none;
  font-size: 0.9rem;
  transition: background 160ms ease, color 160ms ease;
}

.nav-link:hover, .nav-link:focus-visible { color: #fff; background: rgba(255,255,255,0.1); outline: none; }
.nav-link.is-active { color: #103d3f; background: #c7ecde; font-weight: 700; }
.nav-link .nav-icon { width: 1.2rem; color: #9bcab9; text-align: center; }
.nav-link.is-active .nav-icon { color: var(--ocean); }
.nav-link.is-scenario { color: #c1d1cc; font-size: 0.83rem; }
.nav-link.is-scenario .nav-icon { font-size: 0.75rem; }

.sidebar-footer {
  margin-top: auto;
  padding: 1rem 0.7rem 0.3rem;
  border-top: 1px solid rgba(221, 239, 232, 0.15);
}

.sidebar-footer p { margin: 0.25rem 0 0; color: #b8c8c3; font-size: 0.78rem; line-height: 1.55; }

.page-wrap { min-width: 0; }
.mobile-header, .mobile-menu { display: none; }

main {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 3.75rem clamp(1.25rem, 4vw, 4.25rem) 4.5rem;
}

.page-header { max-width: 770px; margin-bottom: 2rem; }
.page-header.compact { margin-bottom: 1.35rem; }
.eyebrow { display: block; color: var(--ocean); font-size: 0.74rem; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; }

h1, h2, h3, p { overflow-wrap: break-word; }
h1, h2, h3 { margin: 0; color: var(--ink); line-height: 1.18; }
h1 { margin-top: 0.36rem; font-size: clamp(2rem, 4.2vw, 3.6rem); letter-spacing: -0.055em; }
h2 { font-size: clamp(1.35rem, 2.2vw, 1.8rem); letter-spacing: -0.035em; }
h3 { font-size: 1rem; }
.lede { max-width: 650px; margin: 1rem 0 0; color: var(--ink-soft); font-size: 1.06rem; }
.muted { color: var(--ink-soft); }

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.28fr) minmax(280px, 0.72fr);
  gap: 1.1rem;
  align-items: stretch;
}

.hero-copy {
  min-height: 350px;
  padding: clamp(1.65rem, 3.5vw, 3rem);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 88% 8%, rgba(205, 237, 219, 0.95) 0 11%, transparent 11.2%),
    radial-gradient(circle at 78% 20%, rgba(151, 216, 209, 0.55) 0 18%, transparent 18.2%),
    linear-gradient(125deg, #e5f4ea, #f7f2e7 70%);
}

.hero-copy h1 { max-width: 680px; }
.hero-copy .lede { max-width: 610px; }
.hero-quote { margin: 1.7rem 0 0; color: var(--ocean-dark); font-size: 1.02rem; font-weight: 700; }
.quote-mark { color: var(--coral); font-size: 1.35em; }

.hero-actions, .inline-actions, .filter-row, .card-actions, .tag-row, .route-trail { display: flex; flex-wrap: wrap; gap: 0.65rem; align-items: center; }
.hero-actions { margin-top: 1.75rem; }

.button, .icon-button, .filter-button {
  min-height: 2.65rem;
  padding: 0.66rem 0.95rem;
  border: 1px solid transparent;
  border-radius: 0.7rem;
  font-weight: 750;
  line-height: 1;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease, color 160ms ease;
}

.button:hover, .icon-button:hover, .filter-button:hover { transform: translateY(-1px); }
.button:focus-visible, .icon-button:focus-visible, .filter-button:focus-visible, a:focus-visible { outline: 3px solid rgba(23, 107, 114, 0.38); outline-offset: 2px; }
.button-primary { color: #fff; background: var(--ocean); box-shadow: 0 9px 16px rgba(23, 107, 114, 0.18); }
.button-primary:hover { background: var(--ocean-dark); }
.button-secondary { color: var(--ocean-dark); border-color: #a7cfc4; background: rgba(255,255,255,0.54); }
.button-secondary:hover { background: #fff; }
.button-quiet { color: var(--ocean-dark); background: transparent; }
.button-quiet:hover { background: var(--mint); }

.today-panel {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.45rem;
  border-radius: var(--radius-lg);
  color: #f6fff9;
  background: var(--ocean-dark);
  box-shadow: var(--shadow);
}

.today-panel h2 { color: inherit; font-size: 1.45rem; }
.today-panel p { margin: 0.7rem 0 1.2rem; color: #c9e4dc; font-size: 0.9rem; }
.today-panel .eyebrow { color: #96ddc3; }

.form-label { display: block; margin-bottom: 0.4rem; color: #bce0d4; font-size: 0.8rem; font-weight: 800; }
.select-wrap { position: relative; }
.select-wrap::after { position: absolute; top: 50%; right: 0.9rem; color: var(--ocean-dark); content: "⌄"; pointer-events: none; transform: translateY(-55%); }

select {
  width: 100%;
  min-height: 2.75rem;
  appearance: none;
  padding: 0.55rem 2rem 0.55rem 0.75rem;
  border: 1px solid transparent;
  border-radius: 0.65rem;
  color: var(--ink);
  background: #fff;
}

select:focus { outline: 3px solid rgba(150, 221, 195, 0.45); }
.today-panel .button { width: 100%; margin-top: 0.9rem; color: var(--ocean-dark); background: #c9ecde; }
.today-panel .button:hover { background: #fff; }

.section { margin-top: 3.5rem; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 1rem; margin-bottom: 1.2rem; }
.section-heading p { max-width: 590px; margin: 0.45rem 0 0; color: var(--ink-soft); }

.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.95rem; }
.feature-card, .strategy-card, .scenario-card, .phrase-card, .callout-card, .today-study-card, .practice-panel, .empty-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.feature-card { min-height: 180px; padding: 1.25rem; }
.feature-card .feature-index { display: block; margin-bottom: 1rem; color: var(--coral-dark); font-size: 0.78rem; font-weight: 900; letter-spacing: 0.06em; }
.feature-card p { margin: 0.6rem 0 0; color: var(--ink-soft); font-size: 0.9rem; }

.progress-overview { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 0.73fr); gap: 1rem; }
.progress-card { padding: 1.35rem; border-radius: var(--radius-md); background: var(--surface); box-shadow: var(--shadow); }
.progress-card h3 { margin-bottom: 0.75rem; }
.progress-numbers { display: flex; align-items: baseline; gap: 0.38rem; }
.progress-numbers strong { color: var(--ocean-dark); font-size: 2.35rem; letter-spacing: -0.07em; }
.progress-numbers span { color: var(--ink-soft); }
.progress-bar { height: 0.62rem; margin-top: 0.65rem; overflow: hidden; border-radius: 100px; background: #e7eee9; }
.progress-bar span { display: block; height: 100%; border-radius: inherit; background: var(--ocean); transition: width 250ms ease; }
.progress-card p { margin: 0.72rem 0 0; color: var(--ink-soft); font-size: 0.88rem; }

.scenario-preview-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.95rem; }
.scenario-card { display: flex; min-height: 205px; flex-direction: column; padding: 1.15rem; text-decoration: none; transition: box-shadow 170ms ease, transform 170ms ease, border-color 170ms ease; }
.scenario-card:hover { border-color: #a7cfc4; box-shadow: var(--shadow); transform: translateY(-2px); }
.scenario-icon { display: inline-grid; width: 2.25rem; height: 2.25rem; place-items: center; border-radius: 0.65rem; color: var(--ocean-dark); background: var(--mint); font-size: 1.15rem; }
.scenario-card h3 { margin-top: 0.9rem; }
.scenario-card p { margin: 0.42rem 0 0; color: var(--ink-soft); font-size: 0.85rem; }
.scenario-card .card-link { margin-top: auto; padding-top: 0.85rem; color: var(--ocean); font-size: 0.84rem; font-weight: 800; }

.strategy-intro { display: grid; grid-template-columns: 0.92fr 1.08fr; gap: 1rem; margin-top: 2rem; }
.strategy-aim { padding: clamp(1.35rem, 3vw, 2.25rem); border-radius: var(--radius-lg); background: var(--sand); }
.strategy-aim .big-statement { margin: 0.8rem 0 0; color: #754322; font-size: clamp(1.3rem, 2.2vw, 1.75rem); font-weight: 800; line-height: 1.38; letter-spacing: -0.04em; }
.strategy-aim p:last-child { margin-bottom: 0; color: #7d583e; }

.strategy-flow { display: grid; gap: 0.7rem; padding: 1.3rem; border-radius: var(--radius-lg); background: #eaf2ee; }
.flow-step { display: grid; grid-template-columns: 2.1rem minmax(0, 1fr); gap: 0.75rem; align-items: center; }
.flow-step + .flow-step::before { position: absolute; }
.flow-number { display: grid; width: 2.1rem; height: 2.1rem; place-items: center; border-radius: 50%; color: var(--ocean-dark); background: #bfe7d9; font-size: 0.8rem; font-weight: 900; }
.flow-step strong { display: block; }
.flow-step span { display: block; margin-top: 0.06rem; color: var(--ink-soft); font-size: 0.83rem; }

.strategy-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.95rem; }
.strategy-card { padding: 1.25rem; }
.strategy-card .strategy-number { display: inline-grid; min-width: 2rem; height: 1.65rem; place-items: center; border-radius: 0.45rem; color: #80441f; background: var(--sand); font-size: 0.75rem; font-weight: 900; }
.strategy-card h3 { margin-top: 0.8rem; }
.strategy-card p { margin: 0.55rem 0 0; color: var(--ink-soft); }
.strategy-card blockquote { margin: 0.95rem 0 0; padding: 0.7rem 0.75rem; border-left: 3px solid #8ac7b1; color: var(--ocean-dark); background: #f4faf7; font-size: 0.88rem; font-weight: 700; }

.practice-panel { display: grid; grid-template-columns: 0.88fr 1.12fr; gap: 1.4rem; padding: clamp(1.25rem, 3vw, 2rem); background: #173f42; }
.practice-panel h2, .practice-panel h3 { color: #f2fbf6; }
.practice-panel p { color: #c9e0d8; }
.practice-panel .eyebrow { color: #97d9c0; }
.practice-panel ol { display: grid; gap: 0.5rem; margin: 0; padding: 0; list-style: none; counter-reset: learning; }
.practice-panel li { display: grid; grid-template-columns: 1.9rem minmax(0, 1fr); gap: 0.7rem; align-items: center; color: #e7f4ee; font-size: 0.9rem; }
.practice-panel li::before { display: grid; width: 1.65rem; height: 1.65rem; place-items: center; border-radius: 50%; color: #173f42; background: #afe2cf; content: counter(learning); counter-increment: learning; font-size: 0.75rem; font-weight: 900; }

.route-diagram { display: grid; gap: 0.72rem; max-width: 750px; margin: 2rem auto 0; }
.route-node { position: relative; padding: 0.72rem 0.85rem; border-radius: 0.7rem; color: var(--ocean-dark); background: #e8f4ee; text-align: center; font-weight: 800; }
.route-node:not(:last-child)::after { position: absolute; bottom: -0.75rem; left: 50%; z-index: -1; width: 2px; height: 0.83rem; background: #9bcbb9; content: ""; }
.route-node.emphasis { color: #fff; background: var(--ocean); }

.appendix-toolbar { display: grid; gap: 1rem; margin: 1.45rem 0 1.1rem; padding: 1rem; border-radius: var(--radius-md); background: #eaf3ef; }
.toolbar-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.8rem; }
.toolbar-note { margin: 0; color: var(--ink-soft); font-size: 0.87rem; }
.filter-row { gap: 0.5rem; }
.filter-button { min-height: 2.25rem; padding: 0.52rem 0.72rem; border-color: #bed5cc; color: var(--ocean-dark); background: rgba(255,255,255,0.55); font-size: 0.82rem; }
.filter-button[aria-pressed="true"] { color: #fff; border-color: var(--ocean); background: var(--ocean); }

.appendix-stats { display: flex; flex-wrap: wrap; align-items: center; gap: 0.65rem 1rem; margin: 0.7rem 0 1.35rem; color: var(--ink-soft); font-size: 0.85rem; }
.appendix-stats strong { color: var(--ocean-dark); }

.phrase-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.9rem; }
.phrase-card { display: flex; min-height: 270px; flex-direction: column; padding: 1.15rem; transition: border-color 150ms ease, box-shadow 150ms ease; }
.phrase-card:hover { border-color: #9dcdbb; box-shadow: 0 8px 26px rgba(33, 63, 61, 0.06); }
.phrase-card.is-practiced { border-color: #97cfb8; background: #fbfffc; }
.phrase-topline { display: flex; align-items: start; justify-content: space-between; gap: 0.75rem; }
.phrase-number { color: var(--coral-dark); font-size: 0.8rem; font-weight: 900; letter-spacing: 0.06em; }
.tag { display: inline-flex; align-items: center; min-height: 1.55rem; padding: 0.2rem 0.52rem; border-radius: 99px; color: #42676a; background: var(--sky); font-size: 0.73rem; font-weight: 750; white-space: nowrap; }
.phrase-intent { margin: 0.72rem 0 0; color: var(--ink); font-size: 1.13rem; font-weight: 850; }
.english-options { display: grid; gap: 0.48rem; margin-top: 0.78rem; }
.english-line { padding: 0.66rem 0.72rem; border-radius: 0.58rem; color: #163f43; background: #f2f8f5; font-family: ui-rounded, "SF Pro Rounded", var(--font-sans); font-size: 0.94rem; font-weight: 720; line-height: 1.45; }
.english-line.hidden-phrase { color: var(--ocean-dark); border: 0; background: repeating-linear-gradient(100deg, #e2ebe7, #e2ebe7 12px, #eff5f2 12px, #eff5f2 22px); cursor: pointer; user-select: none; }
button.english-line { width: 100%; border: 0; text-align: left; }
.phrase-note { min-height: 2.8rem; margin: 0.75rem 0 0; color: var(--ink-soft); font-size: 0.8rem; }
.card-actions { margin-top: auto; padding-top: 0.85rem; }
.small-button { min-height: 2.15rem; padding: 0.48rem 0.7rem; border: 1px solid #bfd5cd; border-radius: 0.58rem; color: var(--ocean-dark); background: #fff; font-size: 0.78rem; font-weight: 800; }
.small-button:hover { background: var(--mint); }
.small-button.is-done { color: #265544; border-color: #93cbb3; background: #dff2e9; }

.empty-state { grid-column: 1 / -1; padding: 2.5rem 1.25rem; border: 1px dashed #aec7bd; border-radius: var(--radius-md); color: var(--ink-soft); background: #fbfdfc; text-align: center; }

.scenario-hero { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(250px, 0.88fr); gap: 1rem; align-items: stretch; }
.scenario-hero-copy { padding: clamp(1.45rem, 3vw, 2.4rem); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow); }
.route-trail { margin-bottom: 1rem; color: var(--ink-soft); font-size: 0.78rem; }
.route-trail a { color: var(--ocean); text-decoration: none; font-weight: 750; }
.scenario-status { display: flex; flex-direction: column; justify-content: space-between; padding: 1.35rem; border-radius: var(--radius-lg); background: var(--lavender); }
.scenario-status .status-label { display: inline-flex; width: fit-content; padding: 0.22rem 0.55rem; border-radius: 99px; color: #544682; background: rgba(255,255,255,0.65); font-size: 0.76rem; font-weight: 800; }
.scenario-status p { margin: 0.7rem 0 0; color: #5d5476; font-size: 0.9rem; }
.scenario-status strong { display: block; margin-top: 1.2rem; color: #4c3979; }

.task-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.85rem; }
.task-card { padding: 1.1rem; border-radius: var(--radius-md); background: var(--surface); }
.task-card h3 { color: var(--ocean-dark); }
.task-card p { margin: 0.45rem 0 0; color: var(--ink-soft); font-size: 0.84rem; }

.future-template { display: grid; grid-template-columns: minmax(0, 1fr) minmax(260px, 0.8fr); gap: 1rem; }
.template-list { display: grid; gap: 0.75rem; padding: 1.2rem; border-radius: var(--radius-md); background: #eaf3ef; }
.template-item { display: grid; grid-template-columns: 2rem minmax(0, 1fr); gap: 0.7rem; }
.template-item span { display: grid; width: 2rem; height: 2rem; place-items: center; border-radius: 0.55rem; color: #fff; background: var(--ocean); font-size: 0.78rem; font-weight: 900; }
.template-item p { margin: 0.1rem 0 0; color: var(--ink-soft); font-size: 0.84rem; }
.callout-card { padding: 1.25rem; background: var(--sand); }
.callout-card p { margin: 0.6rem 0 0; color: #76563f; }
.callout-card ul { display: grid; gap: 0.45rem; margin: 0.9rem 0 0; padding-left: 1.1rem; color: #6d4d35; font-size: 0.88rem; }

.today-study-header { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 1rem; margin-bottom: 1.4rem; }
.today-study-header p { max-width: 640px; margin: 0.75rem 0 0; color: var(--ink-soft); }
.today-list { display: grid; gap: 0.75rem; }
.today-study-card { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 1rem; align-items: center; padding: 1rem; }
.today-card-number { display: grid; width: 2.25rem; height: 2.25rem; place-items: center; border-radius: 50%; color: var(--ocean-dark); background: var(--mint); font-size: 0.82rem; font-weight: 900; }
.today-study-card h3 { margin: 0; }
.today-study-card .english-options { margin-top: 0.5rem; }
.today-study-card .english-line { display: inline-block; margin-right: 0.4rem; padding: 0.32rem 0.5rem; font-size: 0.86rem; }
.today-card-actions { display: flex; flex-wrap: wrap; justify-content: end; gap: 0.45rem; }

.toast {
  position: fixed;
  right: 1.2rem;
  bottom: 1.2rem;
  z-index: 8;
  max-width: min(320px, calc(100vw - 2.4rem));
  padding: 0.72rem 0.9rem;
  border-radius: 0.7rem;
  color: #fff;
  background: var(--ink);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 180ms ease, transform 180ms ease;
}
.toast.show { opacity: 1; transform: translateY(0); }

@media (max-width: 1080px) {
  .feature-grid, .scenario-preview-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .task-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .app-shell { display: block; }
  .sidebar { display: none; }
  .mobile-header { display: flex; align-items: center; justify-content: space-between; padding: 0.8rem 1.05rem; border-bottom: 1px solid var(--line); background: rgba(247,246,241,0.96); }
  .brand-mobile strong { color: var(--ink); }
  .mobile-header .brand-mark { width: 2.1rem; height: 2.1rem; font-size: 1rem; }
  .icon-button { display: inline-grid; width: 2.45rem; place-items: center; padding: 0; border-color: var(--line); color: var(--ocean-dark); background: var(--surface); font-size: 1.15rem; }
  .mobile-menu { position: absolute; z-index: 7; top: 4.4rem; right: 1rem; left: 1rem; max-height: min(75vh, 600px); overflow-y: auto; padding: 0.7rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); box-shadow: var(--shadow); }
  .mobile-menu .nav-group { margin: 0; }
  .mobile-menu .nav-heading { color: var(--ink-soft); }
  .mobile-menu .nav-link { color: var(--ink); }
  .mobile-menu .nav-link.is-scenario { color: var(--ink-soft); }
  .mobile-menu .nav-link.is-active { color: var(--ocean-dark); background: var(--mint); }
  main { padding-top: 2.2rem; }
}

@media (max-width: 700px) {
  main { padding-right: 1rem; padding-left: 1rem; }
  .home-hero, .strategy-intro, .scenario-hero, .future-template, .progress-overview, .practice-panel { grid-template-columns: 1fr; }
  .hero-copy { min-height: 0; }
  .feature-grid, .scenario-preview-grid, .task-grid, .strategy-grid, .phrase-grid { grid-template-columns: 1fr; }
  .section { margin-top: 2.6rem; }
  .section-heading { align-items: start; flex-direction: column; }
  .today-study-card { grid-template-columns: auto minmax(0, 1fr); }
  .today-card-actions { grid-column: 1 / -1; justify-content: start; }
}

@media (max-width: 420px) {
  h1 { font-size: 2.12rem; }
  .hero-actions .button { width: 100%; text-align: center; }
  .toolbar-top { align-items: stretch; }
  .toolbar-top .button { width: 100%; }
  .phrase-card { min-height: 0; }
}

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