:root {
  color-scheme: light;
  --ink: #142d38;
  --ink-soft: #49606a;
  --paper: #f2eee5;
  --paper-bright: #fbfaf6;
  --line: #cfc8ba;
  --accent: #ef6a4c;
  --accent-dark: #b83d2a;
  --sea: #89b6b0;
  --gold: #e9b949;
  --success: #2c765d;
  --danger: #a93f36;
  --shadow: 0 18px 50px rgba(20, 45, 56, 0.12);
  --radius: 18px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { background: var(--paper); scroll-behavior: smooth; }

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(20, 45, 56, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 45, 56, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: 28px 28px;
}

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

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  color: white;
  background: var(--ink);
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }
.is-hidden { display: none !important; }
.eyebrow { margin: 0 0 8px; font-size: .72rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--accent-dark); }

.login-view {
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(80px, .55fr) minmax(300px, 1.2fr) minmax(320px, 1fr);
  align-items: stretch;
  background: var(--paper-bright);
}

.login-mark {
  display: grid;
  place-items: end center;
  padding-bottom: 48px;
  color: var(--paper);
  background: var(--ink);
  font-family: "Newsreader", Georgia, serif;
  font-size: clamp(2rem, 5vw, 5rem);
  writing-mode: vertical-rl;
  letter-spacing: .04em;
}

.login-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8vw 7vw;
  border-right: 1px solid var(--line);
}

.login-copy h1 {
  margin: 0;
  font-family: "Newsreader", Georgia, serif;
  font-size: clamp(4rem, 8vw, 8rem);
  font-weight: 650;
  line-height: .82;
  letter-spacing: -.055em;
}

.login-lede { max-width: 470px; margin: 32px 0 0; font-size: clamp(1.15rem, 2vw, 1.55rem); line-height: 1.5; color: var(--ink-soft); }

.login-form {
  align-self: center;
  display: grid;
  gap: 12px;
  padding: 7vw 5vw;
}

label { font-size: .82rem; font-weight: 700; color: var(--ink-soft); }
input, select, textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--ink);
  border-radius: 0;
  padding: 13px 2px;
  color: var(--ink);
  background: transparent;
}

.login-form select { margin-bottom: 20px; }
.privacy-note { margin: 4px 0 0; font-size: .75rem; line-height: 1.5; color: var(--ink-soft); }

.primary-button, .secondary-button, .text-button, .icon-button, .chip, .rating-button {
  border: 0;
  border-radius: 999px;
  transition: transform .16s ease, background-color .16s ease, color .16s ease, opacity .16s ease;
}

.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 50px;
  padding: 13px 20px;
  color: white;
  background: var(--ink);
  font-weight: 700;
}

.primary-button:hover, .secondary-button:hover, .text-button:hover, .rating-button:hover { transform: translateY(-2px); }
.primary-button:disabled, .secondary-button:disabled { cursor: not-allowed; opacity: .45; transform: none; }
.secondary-button { min-height: 44px; padding: 11px 17px; color: var(--ink); background: transparent; border: 1px solid var(--ink); font-weight: 700; }
.text-button { padding: 8px 2px; color: var(--accent-dark); background: transparent; font-weight: 700; text-decoration: underline; text-underline-offset: 4px; }
.icon-button { width: 42px; height: 42px; color: var(--ink); background: rgba(20,45,56,.07); font-size: 1.4rem; }

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  grid-template-rows: 76px auto;
  grid-template-areas: "header header" "nav main";
}

.app-header {
  position: sticky;
  z-index: 20;
  top: 0;
  grid-area: header;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(242, 238, 229, .92);
  backdrop-filter: blur(15px);
}

.brand-button { display: flex; align-items: center; gap: 12px; padding: 0; border: 0; background: none; text-align: left; }
.brand-button strong, .brand-button small { display: block; }
.brand-button strong { font-family: "Newsreader", Georgia, serif; font-size: 1.25rem; }
.brand-button small { margin-top: -2px; font-size: .66rem; letter-spacing: .08em; color: var(--ink-soft); }
.brand-mark { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; color: var(--paper); background: var(--ink); font-family: "Newsreader", Georgia, serif; font-weight: 650; }
.header-status { display: flex; align-items: center; gap: 16px; font-size: .8rem; color: var(--ink-soft); }
.profile-button { width: 42px; height: 42px; border: 0; border-radius: 50%; color: var(--ink); background: var(--sea); font-weight: 700; }

.side-nav {
  position: sticky;
  top: 76px;
  grid-area: nav;
  align-self: start;
  min-height: calc(100vh - 76px);
  display: flex;
  flex-direction: column;
  padding: 28px 18px;
  border-right: 1px solid var(--line);
}

.nav-item {
  display: grid;
  grid-template-columns: 34px 1fr;
  align-items: center;
  min-height: 48px;
  padding: 0 10px;
  border: 0;
  border-radius: 10px;
  color: var(--ink-soft);
  background: transparent;
  text-align: left;
}
.nav-item span { font-size: .68rem; font-weight: 700; color: #839096; }
.nav-item:hover { color: var(--ink); background: rgba(20,45,56,.05); }
.nav-item.is-active { color: var(--paper); background: var(--ink); }
.nav-item.is-active span { color: var(--sea); }

#main-content { grid-area: main; min-width: 0; padding: 48px clamp(24px, 5vw, 76px) 84px; }
.route-view { display: none; max-width: 1180px; margin: 0 auto; animation: view-enter .32s ease-out; }
.route-view.is-active { display: block; }
@keyframes view-enter { from { opacity: 0; transform: translateY(9px); } to { opacity: 1; transform: none; } }

.page-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 28px; padding-bottom: 24px; border-bottom: 1px solid var(--ink); }
.page-heading h1 { margin: 0; font-family: "Newsreader", Georgia, serif; font-size: clamp(2.7rem, 5vw, 5.4rem); font-weight: 650; line-height: .92; letter-spacing: -.04em; }
.page-heading p:not(.eyebrow) { max-width: 440px; margin: 0; line-height: 1.6; color: var(--ink-soft); }

.countdown { display: flex; align-items: baseline; gap: 8px; white-space: nowrap; }
.countdown strong { font-family: "Newsreader", Georgia, serif; font-size: clamp(3rem, 7vw, 7rem); line-height: .7; }
.countdown span { font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--accent-dark); }

.today-grid { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(270px, .8fr); gap: clamp(30px, 6vw, 88px); padding-top: 38px; }
.section-kicker { display: flex; align-items: center; gap: 10px; margin: 0 0 16px; font-size: .75rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-dark); }
.section-kicker::before { content: ""; width: 28px; height: 1px; background: currentColor; }
.phase-title { margin: 0; font-family: "Newsreader", Georgia, serif; font-size: clamp(2.2rem, 4vw, 4rem); line-height: 1; }
.phase-copy { max-width: 650px; margin: 16px 0 26px; color: var(--ink-soft); line-height: 1.65; }

.training-list { margin: 0 0 28px; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.training-item { display: grid; grid-template-columns: 50px 1fr auto; align-items: center; gap: 12px; min-height: 78px; border-bottom: 1px solid var(--line); }
.training-index { font-family: "Newsreader", Georgia, serif; font-size: 1.4rem; color: var(--accent-dark); }
.training-item strong, .training-item span { display: block; }
.training-item span { margin-top: 4px; font-size: .8rem; color: var(--ink-soft); }
.training-item time { font-size: .78rem; color: var(--ink-soft); }

.today-aside { padding-left: clamp(0px, 2vw, 32px); border-left: 1px solid var(--line); }
.quote-block { margin: 0; padding: 0 0 28px; border-bottom: 1px solid var(--line); }
.quote-block p { margin: 0; font-family: "Newsreader", Georgia, serif; font-size: 1.65rem; line-height: 1.25; }
.quote-block footer { margin-top: 12px; font-size: .78rem; color: var(--ink-soft); }
.mini-metric { display: flex; align-items: baseline; justify-content: space-between; padding: 20px 0; border-bottom: 1px solid var(--line); }
.mini-metric strong { font-family: "Newsreader", Georgia, serif; font-size: 2rem; }
.mini-metric span { max-width: 140px; text-align: right; font-size: .76rem; color: var(--ink-soft); }

.filters { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 22px 0; }
.word-mode-tabs { display: flex; gap: 8px; padding: 22px 0 8px; }
.session-strip { display: grid; grid-template-columns: auto minmax(160px, 1fr) auto; gap: 18px; align-items: center; margin: 18px 0 22px; padding: 14px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.session-strip > div:first-child { display: flex; align-items: baseline; gap: 8px; white-space: nowrap; }
.session-strip strong { font-family: "Newsreader", Georgia, serif; font-size: 1.8rem; }
.session-strip span, .session-strip small { color: var(--ink-soft); font-size: .75rem; }
.session-progress { height: 7px; overflow: hidden; border-radius: 99px; background: rgba(20,45,56,.12); }
.session-progress span { display: block; height: 100%; background: var(--accent); }
.chip { min-height: 36px; padding: 7px 14px; border: 1px solid var(--line); background: transparent; font-size: .78rem; }
.chip:hover, .chip.is-active { color: white; border-color: var(--ink); background: var(--ink); }
.search-box { min-width: 220px; flex: 1; max-width: 360px; margin-left: auto; border: 1px solid var(--line); border-radius: 999px; padding: 9px 14px; background: rgba(255,255,255,.35); }

.word-workspace { min-width: 0; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(250px, .65fr); gap: clamp(28px, 6vw, 78px); align-items: start; }
.flashcard {
  position: relative;
  min-height: 430px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(28px, 5vw, 58px);
  border: 0;
  border-radius: var(--radius);
  color: var(--paper-bright);
  background: var(--ink);
  box-shadow: var(--shadow);
  text-align: left;
  overflow: hidden;
  transform-style: preserve-3d;
}
.flashcard::after { content: ""; position: absolute; right: -70px; bottom: -100px; width: 260px; height: 260px; border: 1px solid rgba(137,182,176,.4); border-radius: 50%; box-shadow: 0 0 0 35px rgba(137,182,176,.08), 0 0 0 70px rgba(137,182,176,.05); }
.word-meta { position: relative; z-index: 1; display: flex; justify-content: space-between; font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: var(--sea); }
.word-main { position: relative; z-index: 1; }
.word-main h2 { margin: 0; font-family: "Newsreader", Georgia, serif; font-size: clamp(3.2rem, 7vw, 7rem); line-height: .9; letter-spacing: -.04em; }
.word-main h2 { max-width: 100%; overflow-wrap: anywhere; }
.word-main h2.is-long { font-size: clamp(2.8rem, 5vw, 5rem); }
.word-main h2.is-chinese-prompt { font-size: clamp(2.7rem, 6vw, 5.7rem); line-height: 1.05; letter-spacing: -.02em; }
.prompt-label { margin: 0 0 14px !important; color: var(--gold) !important; font-size: .76rem !important; font-weight: 700; letter-spacing: .05em; }
.word-main p { max-width: 600px; margin: 22px 0 0; font-size: clamp(1rem, 1.6vw, 1.25rem); line-height: 1.65; color: #dfe7e5; }
.word-reveal { position: relative; z-index: 1; display: flex; justify-content: space-between; gap: 18px; align-items: end; }
.word-reveal strong { font-size: 1.08rem; color: var(--gold); }
.word-reveal span { max-width: 400px; line-height: 1.5; color: #dfe7e5; }
.tap-hint { align-self: flex-end; font-size: .72rem; color: var(--sea); }
.word-actions { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 14px; }
.rating-button { min-height: 54px; padding: 9px; border: 1px solid var(--line); background: rgba(255,255,255,.42); font-size: .78rem; }
.rating-button strong, .rating-button span { display: block; }
.rating-button span { margin-top: 3px; font-size: .66rem; color: var(--ink-soft); }
.rating-button[data-rating="again"] { color: var(--danger); }
.rating-button[data-rating="easy"] { color: var(--success); }

.word-sidebar { border-top: 1px solid var(--ink); }
.word-list-item { width: 100%; display: grid; grid-template-columns: 30px 1fr auto; gap: 10px; align-items: center; padding: 15px 0; border: 0; border-bottom: 1px solid var(--line); background: transparent; text-align: left; }
.word-list-item:hover strong { color: var(--accent-dark); }
.word-list-item small { color: var(--ink-soft); }
.mastery-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--line); }
.mastery-dot.level-1 { background: var(--gold); }
.mastery-dot.level-2, .mastery-dot.level-3 { background: var(--success); }
.word-practice-actions { align-items: center; }
.answer-lock-note { flex: 1; min-width: 180px; color: var(--ink-soft); font-size: .72rem; line-height: 1.45; }
.study-guardrail { border-top: 1px solid var(--ink); }
.study-guardrail ol { margin: 0; padding: 0; list-style: none; counter-reset: guardrail; }
.study-guardrail li { display: grid; grid-template-columns: 1fr; gap: 3px; padding: 15px 0; border-bottom: 1px solid var(--line); counter-increment: guardrail; }
.study-guardrail li::before { content: "0" counter(guardrail); color: var(--accent-dark); font-size: .7rem; font-weight: 700; }
.study-guardrail li span { color: var(--ink-soft); font-size: .76rem; line-height: 1.45; }
.session-complete { max-width: 720px; margin-top: 24px; padding: clamp(28px, 5vw, 54px); border-radius: var(--radius); color: var(--paper-bright); background: var(--ink); box-shadow: var(--shadow); }
.session-complete h2 { margin: 0; font-family: "Newsreader", Georgia, serif; font-size: clamp(2.5rem, 5vw, 4.8rem); line-height: 1; }
.session-complete p:not(.eyebrow) { max-width: 570px; color: #dfe7e5; line-height: 1.65; }
.session-complete .secondary-button { color: white; border-color: var(--sea); }
.session-complete .primary-button { color: var(--ink); background: var(--paper-bright); }
.library-note { margin: 4px 0 16px; color: var(--ink-soft); font-size: .78rem; }
.library-list { border-top: 1px solid var(--ink); }
.library-row { display: grid; grid-template-columns: 24px minmax(0, 1fr) auto; gap: 12px; align-items: start; padding: 16px 0; border-bottom: 1px solid var(--line); }
.library-row > div { min-width: 0; }
.library-row strong { overflow-wrap: anywhere; }
.library-row p { display: grid; gap: 5px; margin: 10px 0 0; color: var(--ink-soft); font-size: .8rem; line-height: 1.5; }
.library-row p b { color: var(--accent-dark); }
.library-row .mastery-dot { margin-top: 6px; }

.speech-layout, .dc-layout, .field-layout { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(270px, .65fr); gap: clamp(28px, 6vw, 76px); padding-top: 34px; }
.scenario-list, .script-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.practice-panel { padding: clamp(24px, 4vw, 46px); border-radius: var(--radius); background: var(--paper-bright); box-shadow: var(--shadow); }
.practice-panel h2 { margin: 0 0 10px; font-family: "Newsreader", Georgia, serif; font-size: clamp(2rem, 4vw, 3.6rem); line-height: 1; }
.practice-prompt { margin: 22px 0; padding: 22px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); font-size: clamp(1.05rem, 2vw, 1.35rem); line-height: 1.7; }
.model-answer { padding: 18px; border-left: 3px solid var(--sea); background: rgba(137,182,176,.12); line-height: 1.65; }
.model-answer.is-covered { filter: blur(7px); user-select: none; }
.practice-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.record-button.is-recording { color: white; border-color: var(--accent-dark); background: var(--accent-dark); animation: pulse 1.2s infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 8px rgba(239,106,76,.15); } }
.record-status { min-height: 24px; margin: 14px 0 0; color: var(--ink-soft); font-size: .8rem; }
audio { width: 100%; margin-top: 14px; }
.speaking-tips { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink); }
.speaking-tips li { padding: 16px 0; border-bottom: 1px solid var(--line); line-height: 1.5; }
.speaking-tips strong { display: block; margin-bottom: 4px; }
.speaking-tips span { font-size: .78rem; color: var(--ink-soft); }

.script-reader { padding-right: 8px; }
.script-reader h2 { margin: 0 0 8px; font-family: "Newsreader", Georgia, serif; font-size: clamp(2.2rem, 4vw, 4.2rem); line-height: 1; }
.script-reader .script-duration { color: var(--accent-dark); font-weight: 700; }
.script-body { margin-top: 24px; font-size: clamp(1.05rem, 1.8vw, 1.3rem); line-height: 1.85; }
.script-body mark { padding: 1px 3px; color: inherit; background: rgba(233,185,73,.35); }
.timer { display: flex; align-items: center; justify-content: space-between; padding: 18px 0; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line); }
.timer-display { font-family: "Newsreader", Georgia, serif; font-size: 3rem; font-variant-numeric: tabular-nums; }
.timer-actions { display: flex; gap: 8px; }
.question-stack { display: grid; gap: 1px; background: var(--line); }
.question-item { padding: 18px 0; background: var(--paper); }
.question-item button { width: 100%; display: flex; align-items: start; justify-content: space-between; gap: 18px; border: 0; background: transparent; text-align: left; font-weight: 700; line-height: 1.45; }
.question-item .answer { display: none; margin: 14px 30px 0 0; padding-left: 16px; border-left: 2px solid var(--accent); color: var(--ink-soft); line-height: 1.6; }
.question-item.is-open .answer { display: block; animation: view-enter .2s ease; }

.phrase-group { border-top: 1px solid var(--ink); }
.phrase-row { display: grid; grid-template-columns: minmax(150px,.55fr) minmax(260px,1fr) auto; gap: 24px; align-items: center; min-height: 92px; border-bottom: 1px solid var(--line); }
.phrase-row small { color: var(--accent-dark); font-weight: 700; }
.phrase-row p { margin: 0; line-height: 1.55; }
.phrase-row button { white-space: nowrap; }
.grammar-pattern { padding: 22px 0; border-bottom: 1px solid var(--line); }
.grammar-pattern code { display: block; margin: 8px 0; font-family: "DM Sans", sans-serif; font-size: 1.12rem; color: var(--accent-dark); white-space: normal; }
.grammar-pattern p { margin: 6px 0 0; color: var(--ink-soft); line-height: 1.5; }

.progress-overview { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--ink); }
.progress-stat { min-height: 145px; padding: 24px; border-right: 1px solid var(--line); }
.progress-stat:last-child { border-right: 0; }
.progress-stat strong { display: block; font-family: "Newsreader", Georgia, serif; font-size: clamp(2.4rem, 5vw, 4.5rem); line-height: 1; }
.progress-stat span { display: block; margin-top: 12px; color: var(--ink-soft); font-size: .78rem; }
.phase-roadmap { margin-top: 42px; border-top: 1px solid var(--ink); }
.roadmap-row { display: grid; grid-template-columns: 150px 1fr 100px; gap: 24px; align-items: center; min-height: 104px; border-bottom: 1px solid var(--line); }
.roadmap-row.is-current { background: linear-gradient(90deg, rgba(239,106,76,.12), transparent); }
.roadmap-row time { font-size: .75rem; color: var(--ink-soft); }
.roadmap-row strong { display: block; }
.roadmap-row p { margin: 5px 0 0; font-size: .82rem; color: var(--ink-soft); }
.progress-bar { height: 7px; border-radius: 99px; background: rgba(20,45,56,.12); overflow: hidden; }
.progress-bar span { display: block; height: 100%; background: var(--accent); }

.mobile-nav { display: none; }
.toast { position: fixed; z-index: 90; right: 24px; bottom: 24px; max-width: 360px; padding: 13px 18px; border-radius: 999px; color: white; background: var(--ink); box-shadow: var(--shadow); opacity: 0; transform: translateY(12px); pointer-events: none; transition: .2s ease; }
.toast.is-visible { opacity: 1; transform: none; }

.profile-dialog { width: min(92vw, 480px); border: 0; border-radius: var(--radius); padding: 0; color: var(--ink); background: var(--paper-bright); box-shadow: var(--shadow); }
.profile-dialog::backdrop { background: rgba(20,45,56,.55); backdrop-filter: blur(4px); }
.profile-dialog form { display: grid; gap: 12px; padding: 28px; }
.dialog-heading { display: flex; justify-content: space-between; align-items: start; margin-bottom: 12px; }
.dialog-heading h2 { margin: 0; font-family: "Newsreader", Georgia, serif; font-size: 2.5rem; }
.dialog-actions { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 20px; }
.voice-setting { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; align-items: end; }
.voice-setting select { min-width: 0; }
.voice-setting .secondary-button { white-space: nowrap; }
.setting-note { margin: -4px 0 4px; font-size: .74rem; line-height: 1.45; color: var(--ink-soft); }
.range-setting { display: grid; grid-template-columns: auto minmax(0, 1fr) 52px; gap: 12px; align-items: center; }
.range-setting span, .range-setting output { font-size: .76rem; color: var(--ink-soft); }
.range-setting output { font-variant-numeric: tabular-nums; text-align: right; }
.range-setting input[type="range"] { padding: 0; border: 0; accent-color: var(--accent); }
.sync-settings { display: grid; gap: 10px; margin-top: 12px; padding-top: 20px; border-top: 1px solid var(--line); }
.sync-heading > div { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.sync-heading p { margin: 6px 0 2px; color: var(--ink-soft); font-size: .72rem; line-height: 1.45; }
.sync-badge { padding: 4px 8px; border-radius: 99px; background: rgba(20,45,56,.08); color: var(--ink-soft); font-size: .66rem; font-weight: 700; }
.sync-badge.is-connected { color: var(--success); background: rgba(44,118,93,.12); }
.sync-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.sync-actions .secondary-button { min-height: 38px; padding: 8px 12px; font-size: .74rem; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

@media (max-width: 880px) {
  .login-view { grid-template-columns: 72px 1fr; grid-template-rows: 1fr auto; }
  .login-copy { border-right: 0; }
  .login-form { grid-column: 2; width: 100%; padding-top: 0; }
  .login-mark { grid-row: 1 / 3; }
  .app-shell { grid-template-columns: 88px minmax(0, 1fr); }
  .nav-item { grid-template-columns: 1fr; justify-items: center; gap: 3px; padding: 6px; text-align: center; font-size: .72rem; }
  .nav-item span { display: block; }
  .today-grid, .word-workspace, .speech-layout, .dc-layout, .field-layout { grid-template-columns: 1fr; }
  .today-aside { padding: 0; border-left: 0; border-top: 1px solid var(--ink); padding-top: 28px; }
  .study-guardrail { margin-top: 12px; }
  .progress-overview { grid-template-columns: repeat(2, 1fr); }
  .progress-stat:nth-child(2) { border-right: 0; }
  .progress-stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 640px) {
  html, body { max-width: 100%; overflow-x: clip; }
  body { background-size: 22px 22px; }
  .login-view { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto auto auto; padding: max(24px, env(safe-area-inset-top)) 24px 24px; }
  .login-mark { grid-row: auto; justify-self: start; width: 56px; height: 56px; place-items: center; padding: 0; border-radius: 50%; writing-mode: horizontal-tb; font-size: 1.4rem; }
  .login-copy, .login-form { grid-column: 1; padding: 18px 0; }
  .login-copy { justify-content: end; }
  .login-copy h1 { font-size: clamp(3.8rem, 20vw, 6.4rem); }
  .login-lede { margin-top: 20px; }
  .app-shell { display: block; padding-bottom: 76px; }
  .app-header { height: calc(66px + env(safe-area-inset-top)); padding: calc(10px + env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) 10px max(16px, env(safe-area-inset-left)); }
  .brand-mark { width: 40px; height: 40px; }
  .brand-button strong { font-size: 1.05rem; }
  .brand-button small, #streak-label { display: none; }
  .side-nav { display: none; }
  #main-content { width: 100%; overflow: hidden; padding: 28px max(18px, env(safe-area-inset-right)) 68px max(18px, env(safe-area-inset-left)); }
  .page-heading { display: block; }
  .page-heading h1 { font-size: clamp(2.75rem, 14vw, 4.1rem); }
  .page-heading p:not(.eyebrow) { margin-top: 16px; }
  .countdown { margin-top: 26px; }
  .today-grid { padding-top: 28px; }
  .training-item { grid-template-columns: 38px 1fr auto; }
  .word-mode-tabs { padding-top: 18px; }
  .session-strip { grid-template-columns: auto minmax(0, 1fr); gap: 10px; }
  .session-strip small { grid-column: 1 / -1; }
  .filters { width: 100%; overflow: visible; flex-wrap: wrap; padding-bottom: 14px; }
  .chip { flex: 0 0 auto; }
  .search-box { order: -1; min-width: 0; max-width: none; flex: 1 0 100%; margin-left: 0; }
  .flashcard { width: 100%; min-height: 360px; padding: 24px; border-radius: 14px; }
  .word-meta { gap: 12px; font-size: .61rem; }
  .word-main h2 { font-size: clamp(2.65rem, 13.5vw, 4.2rem); line-height: .96; }
  .word-main h2.is-chinese-prompt { font-size: clamp(2.45rem, 12vw, 3.6rem); }
  .word-reveal { display: grid; gap: 12px; align-items: start; }
  .word-reveal span { max-width: 100%; }
  .tap-hint { align-self: start; }
  .word-actions { position: sticky; z-index: 12; bottom: calc(69px + env(safe-area-inset-bottom)); grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 5px; margin: 12px -4px 0; padding: 8px 4px; background: rgba(242,238,229,.96); backdrop-filter: blur(10px); }
  .rating-button { min-height: 58px; padding: 7px 3px; background: var(--paper-bright); font-size: .7rem; }
  .rating-button span { font-size: .58rem; }
  .answer-lock-note { flex-basis: 100%; min-width: 0; }
  .study-guardrail { padding-top: 20px; }
  .library-row { grid-template-columns: 18px minmax(0, 1fr) auto; gap: 8px; }
  .library-row .text-button { font-size: .72rem; }
  .practice-panel { border-radius: 14px; padding: 22px; }
  .phrase-row { grid-template-columns: 1fr auto; gap: 8px 14px; padding: 16px 0; }
  .phrase-row small { grid-column: 1; }
  .phrase-row p { grid-column: 1; }
  .phrase-row button { grid-column: 2; grid-row: 1 / 3; }
  .progress-overview { grid-template-columns: 1fr 1fr; }
  .progress-stat { min-height: 118px; padding: 18px 12px; }
  .roadmap-row { grid-template-columns: 95px 1fr; gap: 14px; }
  .roadmap-row .progress-bar { grid-column: 2; width: 100%; margin-bottom: 16px; }
  .mobile-nav { position: fixed; z-index: 40; left: 0; right: 0; bottom: 0; display: grid; grid-template-columns: repeat(5, 1fr); padding: 8px max(6px, env(safe-area-inset-left)) calc(8px + env(safe-area-inset-bottom)); border-top: 1px solid var(--line); background: rgba(251,250,246,.95); backdrop-filter: blur(14px); }
  .mobile-nav-item { display: grid; place-items: center; gap: 2px; min-height: 48px; border: 0; border-radius: 8px; color: var(--ink-soft); background: transparent; font-size: .64rem; }
  .mobile-nav-item span { font-size: .84rem; font-weight: 700; }
  .mobile-nav-item.is-active { color: white; background: var(--ink); }
  .toast { left: 18px; right: 18px; bottom: 82px; text-align: center; }
  .profile-dialog { width: 100%; max-width: none; max-height: calc(100svh - env(safe-area-inset-top)); margin: auto 0 0; border-radius: 18px 18px 0 0; }
  .profile-dialog form { max-height: calc(100svh - env(safe-area-inset-top)); overflow-y: auto; padding: 24px 20px calc(24px + env(safe-area-inset-bottom)); }
  .voice-setting { grid-template-columns: 1fr; }
  .dialog-actions { align-items: stretch; flex-direction: column-reverse; }
}