:root {
  --ink: #101312;
  --ink-soft: #1b201e;
  --paper: #f4f0e8;
  --paper-deep: #e6ded0;
  --gold: #b08a57;
  --red: #a91e29;
  --muted: #756f66;
  --line: rgba(16, 19, 18, .14);
  --cream: #faf7f0;
  --serif: Georgia, "Times New Roman", serif;
  --sans: Inter, "Helvetica Neue", Arial, sans-serif;
  --jp: "Yu Mincho", "Hiragino Mincho ProN", serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { min-height: 100%; background: #090b0a; scroll-behavior: smooth; }
body { min-height: 100%; margin: 0; background: #090b0a; color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
button, a { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: default; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }

.survival-app {
  width: min(100%, 430px);
  min-height: 100svh;
  margin: 0 auto;
  background:
    radial-gradient(circle at 88% 8%, rgba(176, 138, 87, .14), transparent 18rem),
    var(--paper);
  box-shadow: 0 0 70px rgba(0, 0, 0, .46);
  position: relative;
  overflow: hidden;
}

.app-header {
  min-height: 64px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(250, 247, 240, .1);
  background: rgba(12, 15, 14, .97);
  color: var(--cream);
}
.brand { display: flex; align-items: baseline; gap: 9px; min-width: 0; }
.brand-mark { color: var(--gold); font-family: var(--serif); font-size: 1.35rem; }
.brand-name { font-family: var(--serif); font-size: 1rem; white-space: nowrap; }
.header-label { color: rgba(250, 247, 240, .52); font-size: .56rem; letter-spacing: .18em; text-transform: uppercase; }
.breadcrumb {
  padding: 14px 18px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: rgba(250, 247, 240, .48);
  background: rgba(12, 15, 14, .97);
  font-size: .58rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.breadcrumb a { color: rgba(250, 247, 240, .74); text-decoration: none; }
.breadcrumb span { color: var(--gold); }

.screen { min-height: calc(100svh - 64px); padding: 32px 18px 28px; }
.screen[data-screen="lesson"] { padding-bottom: calc(86px + env(safe-area-inset-bottom)); }
.screen-dark {
  color: var(--cream);
  background:
    radial-gradient(circle at 80% 7%, rgba(176, 138, 87, .2), transparent 19rem),
    radial-gradient(circle at 2% 80%, rgba(169, 30, 41, .12), transparent 20rem),
    linear-gradient(160deg, #0c0f0e, #181d1a 60%, #22251f);
}
.eyebrow { margin: 0 0 12px; color: var(--gold); font-size: .58rem; font-weight: 700; letter-spacing: .22em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-family: var(--serif); font-weight: 500; }
h1 { margin-bottom: 18px; font-size: clamp(3.1rem, 14vw, 4.3rem); line-height: .92; letter-spacing: -.045em; }
h2 { margin-bottom: 14px; font-size: clamp(2.35rem, 11vw, 3.2rem); line-height: .96; letter-spacing: -.04em; }
.lead { max-width: 34rem; margin-bottom: 26px; color: rgba(250, 247, 240, .64); font-size: .86rem; line-height: 1.72; }
.proof { display: flex; gap: 18px; margin-bottom: 34px; padding-bottom: 22px; border-bottom: 1px solid rgba(250, 247, 240, .12); }
.proof span { display: grid; gap: 4px; color: rgba(250, 247, 240, .48); font-size: .55rem; letter-spacing: .12em; text-transform: uppercase; }
.proof strong { color: var(--cream); font-family: var(--serif); font-size: 1.25rem; font-weight: 500; letter-spacing: 0; text-transform: none; }

.module-grid { display: grid; gap: 12px; }
.module-card {
  width: 100%;
  min-height: 182px;
  padding: 19px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 16px;
  text-align: left;
  color: var(--cream);
  background: linear-gradient(145deg, rgba(255, 255, 255, .09), rgba(255, 255, 255, .025));
  border: 1px solid rgba(250, 247, 240, .14);
  box-shadow: 0 18px 48px rgba(0, 0, 0, .16);
}
.module-card:not(:disabled):hover { border-color: rgba(176, 138, 87, .62); }
.module-card:focus-visible, .primary-button:focus-visible, .ghost-button:focus-visible, .nav-button:focus-visible, .audio-button:focus-visible, .quiz-options button:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}
.module-number { color: var(--gold); font-size: .62rem; font-weight: 700; letter-spacing: .2em; }
.module-japanese { display: grid; justify-items: end; color: rgba(250, 247, 240, .24); font-family: var(--jp); font-size: 1.5rem; }
.module-japanese small { margin-top: 2px; font-family: var(--sans); font-size: .46rem; font-weight: 500; letter-spacing: .08em; }
.module-card strong { grid-column: 1 / -1; font-family: var(--serif); font-size: 2rem; font-weight: 500; }
.module-card > span:nth-of-type(3) { grid-column: 1 / -1; color: rgba(250, 247, 240, .57); font-size: .76rem; line-height: 1.55; }
.module-card em { grid-column: 1 / -1; margin-top: 8px; color: var(--gold); font-size: .56rem; font-style: normal; font-weight: 700; letter-spacing: .17em; text-transform: uppercase; }
.module-card.is-soon { min-height: 142px; opacity: .52; }

.offer-card { margin-top: 30px; padding: 24px 20px; color: var(--ink); background: var(--cream); border: 1px solid rgba(176, 138, 87, .5); box-shadow: 0 24px 60px rgba(0, 0, 0, .2); }
.offer-card h2 { margin-bottom: 14px; font-size: 2.15rem; line-height: 1.02; }
.offer-benefit { color: var(--muted); font-size: .8rem; line-height: 1.65; }
.offer-details { margin: 22px 0; display: grid; gap: 16px; }
.offer-details div { padding-top: 14px; border-top: 1px solid var(--line); }
.offer-details strong { display: block; margin-bottom: 6px; color: var(--red); font-size: .55rem; letter-spacing: .14em; text-transform: uppercase; }
.offer-details p { margin: 0; color: var(--muted); font-size: .74rem; line-height: 1.55; }
.offer-price { margin: 0 0 16px; display: flex; align-items: baseline; justify-content: space-between; gap: 12px; color: var(--muted); font-size: .58rem; letter-spacing: .12em; text-transform: uppercase; }
.offer-price strong { color: var(--ink); font-family: var(--serif); font-size: 2.35rem; font-weight: 500; letter-spacing: 0; }
.checkout-microcopy { margin: 10px 0 0; color: var(--muted); font-size: .58rem; line-height: 1.5; text-align: center; }
.checkout-microcopy--dark { margin: 0 0 5px; color: rgba(250, 247, 240, .52); }

.thanks-screen { min-height: calc(100svh - 64px); display: grid; align-content: center; padding: 36px 22px; }
.thanks-mark { width: 62px; height: 62px; display: grid; place-items: center; margin-bottom: 24px; color: var(--gold); border: 1px solid rgba(176, 138, 87, .55); font-family: var(--serif); font-size: 1.25rem; }
.thanks-screen h1 { max-width: 350px; margin-bottom: 20px; font-size: clamp(2.8rem, 13vw, 4rem); }
.manual-access-note { margin: 2px 0 24px; padding: 16px; color: rgba(250, 247, 240, .7); background: rgba(176, 138, 87, .1); border-left: 2px solid var(--gold); }
.manual-access-note strong { display: block; margin-bottom: 7px; color: var(--gold); font-size: .56rem; letter-spacing: .14em; text-transform: uppercase; }
.manual-access-note p { margin: 0; font-size: .72rem; line-height: 1.6; }
.thanks-steps { margin: 4px 0 28px; padding: 0; list-style: none; border-top: 1px solid rgba(250, 247, 240, .14); }
.thanks-steps li { min-height: 62px; display: grid; grid-template-columns: 24px 1fr; align-items: center; gap: 10px; color: rgba(250, 247, 240, .66); border-bottom: 1px solid rgba(250, 247, 240, .14); font-size: .72rem; line-height: 1.5; }
.thanks-steps span { color: var(--gold); font-size: .58rem; font-weight: 700; }
.thanks-actions { display: grid; gap: 9px; }
.manual-access-footnote { margin: 13px 0 0; color: rgba(250, 247, 240, .46); font-size: .58rem; line-height: 1.55; text-align: center; }

.premium-access-screen { padding-top: 20px; padding-bottom: calc(86px + env(safe-area-inset-bottom)); }
.premium-access-notice { margin-bottom: 18px; padding: 10px 12px; color: var(--muted); background: rgba(176, 138, 87, .09); border: 1px solid rgba(176, 138, 87, .3); font-size: .58rem; line-height: 1.5; text-align: center; letter-spacing: .06em; }
.premium-access-badge { color: var(--gold); font-size: .54rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.premium-lesson-card { min-height: clamp(370px, calc(100svh - 310px), 500px); }
.premium-card-mark { min-height: 70px; margin: -22px -22px 24px; padding: 15px 20px; display: flex; align-items: center; justify-content: space-between; color: var(--cream); background: linear-gradient(135deg, #151916, #28271f); border-bottom: 1px solid rgba(176, 138, 87, .45); }
.premium-card-mark span { color: var(--gold); font-size: .55rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.premium-card-mark strong { color: rgba(250, 247, 240, .3); font-family: var(--serif); font-size: 1.8rem; font-weight: 500; }

.intro-topline, .lesson-topline, .quiz-topline { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; margin-bottom: 24px; }
.text-button { padding: 0; color: var(--muted); background: none; border: 0; font-size: .62rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.intro-japanese { margin: 0 0 7px; display: grid; gap: 3px; color: var(--red); font-family: var(--jp); font-size: 1.1rem; }
.intro-japanese small { color: var(--muted); font-family: var(--sans); font-size: .62rem; }
.intro-copy { margin-bottom: 24px; color: var(--muted); font-size: .86rem; line-height: 1.7; }
.intro-stat { display: inline-flex; gap: 7px; margin-bottom: 24px; padding: 8px 11px; border: 1px solid var(--line); color: var(--muted); font-size: .58rem; letter-spacing: .12em; text-transform: uppercase; }
.roadmap { margin: 0 0 26px; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.roadmap li { min-height: 62px; display: grid; grid-template-columns: 28px 1fr auto; align-items: center; gap: 10px; border-bottom: 1px solid var(--line); }
.roadmap li > span { color: var(--gold); font-size: .58rem; font-weight: 700; }
.roadmap strong { font-family: var(--serif); font-size: .95rem; font-weight: 500; }
.roadmap em, .roadmap i { color: var(--muted); font-size: .5rem; font-style: normal; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.roadmap i { display: flex; align-items: center; gap: 4px; }
.roadmap svg, .locked-list svg { width: 13px; height: 13px; fill: none; stroke: currentColor; stroke-width: 1.6; }
.roadmap .is-locked { opacity: .46; }

.primary-button, .ghost-button, .nav-button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border: 1px solid var(--ink);
  font-size: .58rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.primary-button { width: 100%; color: var(--cream); background: var(--ink); }
.primary-button:hover { background: var(--red); border-color: var(--red); }
.ghost-button, .nav-button { color: var(--ink); background: transparent; }
.ghost-button:hover, .nav-button:hover { border-color: var(--gold); }
.primary-button[disabled] { opacity: .42; }

.progress-shell { margin-bottom: 26px; }
.progress-label { display: flex; justify-content: space-between; margin-bottom: 8px; color: var(--muted); font-size: .56rem; letter-spacing: .12em; text-transform: uppercase; }
.progress-track { height: 2px; overflow: hidden; background: var(--paper-deep); }
.progress-fill { width: 0; height: 100%; background: var(--red); transition: width .25s ease; }

.lesson-card { min-height: clamp(350px, calc(100svh - 300px), 480px); padding: 22px; display: flex; flex-direction: column; background: var(--cream); border: 1px solid var(--line); box-shadow: 0 20px 52px rgba(21, 24, 23, .1); }
.lesson-situation { color: var(--red); font-size: .58rem; font-weight: 700; letter-spacing: .17em; text-transform: uppercase; }
.lesson-media { min-height: 240px; margin: 14px 0 20px; display: grid; place-items: center; overflow: hidden; background: #151815; border: 1px solid var(--line); }
.lesson-image { display: block; width: 100%; height: min(46svh, 400px); border: 0; }
.lesson-image { object-fit: contain; object-position: center; background: #151815; }
.language-block { display: grid; gap: 5px; }
.language-block p { margin: 0; }
.lesson-language { margin-bottom: 18px; }
.jp-main { font-family: var(--jp); }
.lesson-language .jp-main { font-size: clamp(1.9rem, 9vw, 2.8rem); line-height: 1.45; }
.jp-main ruby { ruby-position: over; }
.jp-main rt { color: var(--red); font-family: var(--jp); font-size: .42em; font-weight: 500; }
.jp-reading { color: var(--ink-soft); font-family: var(--jp); font-size: .92rem; line-height: 1.5; }
.jp-romaji { color: var(--gold); font-size: .68rem; font-style: italic; letter-spacing: .035em; line-height: 1.5; }
.jp-portuguese { margin-top: 4px !important; color: var(--muted); font-family: var(--serif); font-size: 1.22rem; line-height: 1.35; }
.lesson-note { margin-top: auto; padding-top: 22px; border-top: 1px solid var(--line); }
.lesson-note span { color: var(--gold); font-size: .53rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.lesson-note p { margin: 7px 0 18px; color: var(--muted); font-size: .75rem; line-height: 1.55; }
.audio-controls { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.audio-button { min-height: 40px; display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; color: var(--ink); background: transparent; border: 1px solid var(--line); font-size: .55rem; font-weight: 700; letter-spacing: .11em; text-transform: uppercase; }
.audio-button svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.6; }
.audio-button.is-playing { color: var(--red); border-color: var(--red); }
.audio-button--slow { color: var(--muted); }
.sr-status { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); }
.bottom-nav { position: fixed; z-index: 5; left: 50%; bottom: 0; width: min(100%, 430px); display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 0; padding: 10px 18px calc(10px + env(safe-area-inset-bottom)); transform: translateX(-50%); background: rgba(244, 240, 232, .96); border-top: 1px solid var(--line); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.nav-button[disabled] { opacity: .3; }

.quiz-card { min-height: clamp(340px, calc(100svh - 310px), 420px); padding: 26px 20px; background: var(--cream); border: 1px solid var(--line); box-shadow: 0 20px 52px rgba(21, 24, 23, .1); }
.quiz-card h2 { margin-bottom: 27px; font-size: 1.7rem; line-height: 1.18; }
.quiz-prompt-language { margin: -10px 0 20px; padding: 14px; background: rgba(176, 138, 87, .08); border-left: 2px solid var(--gold); }
.quiz-prompt-language .jp-main { font-size: 1.45rem; line-height: 1.45; }
.quiz-options { display: grid; gap: 9px; }
.quiz-options button { min-height: 52px; padding: 11px 13px; display: grid; gap: 3px; text-align: left; color: var(--ink); background: transparent; border: 1px solid var(--line); font-size: .78rem; }
.option-japanese { font-family: var(--jp); font-size: 1rem; line-height: 1.55; }
.option-japanese rt { color: var(--red); font-size: .48em; }
.option-reading { color: var(--ink-soft); font-family: var(--jp); font-size: .69rem; }
.option-romaji { color: var(--gold); font-size: .61rem; font-style: italic; }
.option-portuguese { color: var(--muted); font-size: .72rem; line-height: 1.4; }
.quiz-options button > .option-portuguese:only-child { color: var(--ink); font-size: .78rem; }
.quiz-options button:hover:not(:disabled) { border-color: var(--gold); }
.quiz-options button.is-correct { color: #245e3a; background: rgba(65, 137, 87, .09); border-color: #418957; }
.quiz-options button.is-wrong { color: var(--red); background: rgba(169, 30, 41, .07); border-color: var(--red); }
.quiz-feedback { margin: 14px 0; padding: 13px; border-left: 2px solid var(--gold); color: var(--muted); background: rgba(176, 138, 87, .08); }
.quiz-feedback strong { color: var(--ink); font-family: var(--serif); font-weight: 500; }
.quiz-feedback p { margin: 5px 0 0; font-size: .72rem; line-height: 1.5; }
.feedback-language { margin-top: 10px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.feedback-language .jp-main { font-size: 1.2rem; line-height: 1.5; }
.feedback-language .jp-portuguese { font-size: .92rem; }
.feedback-answer { color: var(--ink) !important; font-family: var(--serif); font-size: .95rem !important; }

.unlock-mark { width: 56px; height: 56px; display: grid; place-items: center; margin-bottom: 25px; border: 1px solid rgba(176, 138, 87, .5); color: var(--gold); font-family: var(--serif); font-size: 1.2rem; }
.unlock-score { display: flex; align-items: baseline; gap: 9px; margin: 23px 0; color: rgba(250, 247, 240, .5); font-size: .58rem; letter-spacing: .14em; text-transform: uppercase; }
.unlock-score strong { color: var(--cream); font-family: var(--serif); font-size: 2.1rem; font-weight: 500; letter-spacing: 0; }
.locked-list { margin: 0 0 26px; padding: 0; list-style: none; border-top: 1px solid rgba(250, 247, 240, .12); }
.locked-list li { min-height: 62px; display: flex; align-items: center; gap: 13px; border-bottom: 1px solid rgba(250, 247, 240, .12); color: var(--gold); }
.locked-list span { display: grid; gap: 3px; color: var(--cream); }
.locked-list strong { font-family: var(--serif); font-size: .96rem; font-weight: 500; }
.locked-list small { color: rgba(250, 247, 240, .4); font-size: .5rem; letter-spacing: .11em; text-transform: uppercase; }
.unlock-actions { display: grid; gap: 9px; }
.screen-dark .primary-button { color: var(--ink); background: var(--gold); border-color: var(--gold); }
.screen-dark .ghost-button { color: var(--cream); border-color: rgba(250, 247, 240, .28); }

.app-toast { position: fixed; z-index: 30; left: 50%; bottom: calc(18px + env(safe-area-inset-bottom)); width: min(calc(100% - 32px), 390px); padding: 13px 16px; transform: translate(-50%, 12px); opacity: 0; color: var(--cream); background: rgba(16, 19, 18, .96); border: 1px solid rgba(176, 138, 87, .48); box-shadow: 0 14px 36px rgba(0, 0, 0, .28); font-size: .72rem; line-height: 1.45; text-align: center; transition: opacity .18s ease, transform .18s ease; }
.app-toast.is-visible { transform: translate(-50%, 0); opacity: 1; }

@media (max-height: 700px) {
  .screen { padding-top: 14px; padding-bottom: 12px; }
  .intro-topline, .lesson-topline, .quiz-topline { margin-bottom: 10px; }
  .progress-shell { margin-bottom: 12px; }
  .lesson-card { min-height: 0; padding: 16px; }
  .premium-card-mark { margin: -16px -16px 20px; }
  .lesson-media { margin: 0 0 12px; }
  .lesson-media { min-height: 210px; }
  .lesson-image { height: min(42svh, 300px); }
  .lesson-language .jp-main { font-size: 1.7rem; }
  .lesson-language .jp-portuguese { font-size: 1.05rem; }
  .lesson-note { margin-top: 12px; padding-top: 12px; }
  .lesson-note p { margin-bottom: 10px; }
  .quiz-card { min-height: 0; padding: 16px; }
  .quiz-card h2 { margin-bottom: 18px; font-size: 1.45rem; }
  .quiz-options { gap: 6px; }
  .quiz-options button { min-height: 46px; }
}

@media (min-width: 700px) {
  body { padding: 24px 0; }
  .survival-app { min-height: calc(100svh - 48px); border-radius: 22px; }
  .screen { min-height: calc(100svh - 112px); padding: 38px 28px 32px; }
  .screen[data-screen="lesson"] { padding-bottom: 94px; }
  .bottom-nav { bottom: 24px; border-radius: 0 0 22px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .001ms !important; animation-duration: .001ms !important; }
}