:root {
  --navy: #123047;
  --navy-2: #0a2032;
  --teal: #13a9a5;
  --teal-dark: #0a7779;
  --gold: #f2b84b;
  --cream: #fff8ea;
  --paper: #fffbf2;
  --ink: #172231;
  --muted: #5d6b7a;
  --soft: #eaf6f5;
  --line: rgba(18, 48, 71, 0.14);
  --shadow: 0 20px 55px rgba(8, 30, 45, 0.18);
  --radius: 24px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(19, 169, 165, 0.18), transparent 34rem),
    radial-gradient(circle at top right, rgba(242, 184, 75, 0.18), transparent 32rem),
    linear-gradient(180deg, #fffdf7 0%, #f4fbfb 45%, #fff8ea 100%);
  line-height: 1.55;
}
a { color: inherit; }
.skip-link { position: absolute; left: -999px; top: 1rem; z-index: 999; background: white; padding: .75rem 1rem; border-radius: .75rem; }
.skip-link:focus { left: 1rem; }
header { position: sticky; top: 0; z-index: 50; backdrop-filter: blur(18px); background: rgba(255, 251, 242, 0.88); border-bottom: 1px solid var(--line); }
.nav { max-width: 1180px; margin: 0 auto; padding: .85rem 1.25rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: flex; align-items: center; gap: .75rem; text-decoration: none; min-width: max-content; }
.logo-mark { width: 52px; height: 52px; border-radius: 16px; object-fit: contain; filter: drop-shadow(0 8px 18px rgba(18,48,71,.28)); }
.brand-text strong { display: block; color: var(--navy); font-size: 1.05rem; line-height: 1; }
.brand-text small { display: block; color: var(--teal-dark); font-weight: 800; font-size: .75rem; margin-top: .12rem; }
nav ul { list-style: none; padding: 0; margin: 0; display: flex; align-items: center; gap: .35rem; flex-wrap: wrap; justify-content: flex-end; }
nav a { text-decoration: none; color: var(--navy); font-weight: 750; font-size: .9rem; padding: .55rem .7rem; border-radius: 999px; }
nav a:hover, nav a:focus-visible { background: rgba(19, 169, 165, .12); outline: none; }
.hero { max-width: 1180px; margin: 0 auto; padding: 5.2rem 1.25rem 3rem; display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr); gap: 2rem; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: .5rem; border: 1px solid rgba(19, 169, 165, .35); background: rgba(255,255,255,.72); color: var(--teal-dark); border-radius: 999px; padding: .4rem .75rem; font-weight: 850; font-size: .9rem; box-shadow: 0 8px 24px rgba(8, 30, 45, .06); }
.hero h1 { font-size: clamp(3rem, 7vw, 6.5rem); line-height: .88; letter-spacing: -.075em; margin: 1.2rem 0 1rem; color: var(--navy); }
.hero h1 span { color: var(--teal-dark); }
.hero p.lead { font-size: clamp(1.1rem, 2vw, 1.35rem); color: #304052; max-width: 62ch; margin: 0 0 1.4rem; }
.actions { display: flex; flex-wrap: wrap; gap: .85rem; margin-top: 1.45rem; }
.btn { appearance: none; border: 0; display: inline-flex; align-items: center; justify-content: center; gap: .5rem; min-height: 46px; padding: .8rem 1.05rem; border-radius: 999px; font-weight: 900; text-decoration: none; cursor: pointer; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; font-size: .95rem; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: linear-gradient(135deg, var(--teal), var(--navy)); color: white; box-shadow: 0 14px 30px rgba(19, 169, 165, .28); }
.btn-gold { background: linear-gradient(135deg, #ffd983, var(--gold)); color: #412900; box-shadow: 0 14px 30px rgba(242, 184, 75, .28); }
.btn-ghost { background: rgba(255,255,255,.74); border: 1px solid var(--line); color: var(--navy); }
.hero-card { background: rgba(255,255,255,.76); border: 1px solid rgba(18,48,71,.12); border-radius: 34px; box-shadow: var(--shadow); overflow: hidden; position: relative; }
.hero-card-top { padding: 1.5rem; background: radial-gradient(circle at top left, rgba(242,184,75,.28), transparent 18rem), linear-gradient(135deg, var(--navy), #154967 54%, var(--teal-dark)); color: white; text-align: center; }
.big-logo { display: block; margin: 0 auto 1rem; width: min(280px, 90%); max-height: 220px; object-fit: contain; filter: drop-shadow(0 18px 35px rgba(0,0,0,.32)); }
.hero-card h2 { font-size: 1.7rem; margin: .2rem 0 .4rem; letter-spacing: -.04em; color: white; }
.hero-card p { margin: 0; color: rgba(255,255,255,.88); }
.hero-card-body { padding: 1.2rem 1.35rem 1.45rem; display: grid; gap: .75rem; }
.mini-stat { display: flex; align-items: start; gap: .75rem; background: rgba(234,246,245,.78); border-radius: 18px; padding: .85rem; border: 1px solid rgba(19,169,165,.16); }
.mini-stat b { color: var(--navy); display: block; line-height: 1.2; }
.mini-stat span { color: var(--muted); font-size: .91rem; }
main section { max-width: 1180px; margin: 0 auto; padding: 3.5rem 1.25rem; }
.section-head { max-width: 760px; margin-bottom: 1.5rem; }
.section-head.center { margin-inline: auto; text-align: center; }
.kicker { color: var(--teal-dark); font-weight: 950; text-transform: uppercase; letter-spacing: .08em; font-size: .78rem; margin: 0 0 .35rem; }
h2 { color: var(--navy); font-size: clamp(2rem, 4vw, 3.5rem); line-height: .98; letter-spacing: -.055em; margin: 0 0 .8rem; }
h3 { color: var(--navy); font-size: 1.3rem; letter-spacing: -.025em; margin: 0 0 .45rem; }
.section-head p, .muted { color: var(--muted); }
.grid { display: grid; gap: 1rem; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { background: rgba(255,255,255,.74); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem; box-shadow: 0 10px 32px rgba(8,30,45,.07); }
.card strong.label { display: inline-flex; align-items: center; justify-content: center; min-width: 2rem; height: 2rem; border-radius: 999px; background: rgba(242,184,75,.24); color: #744900; margin-bottom: .75rem; }
.rule-list { display: grid; gap: .75rem; padding: 0; margin: 0; list-style: none; }
.rule-list li { background: rgba(255,255,255,.64); border: 1px solid var(--line); border-radius: 18px; padding: .8rem .95rem; }
.pill-row { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: .85rem; }
.pill { display: inline-flex; border-radius: 999px; border: 1px solid rgba(19,169,165,.22); background: rgba(234,246,245,.65); padding: .38rem .65rem; color: var(--teal-dark); font-weight: 850; font-size: .85rem; }
.quote-band { margin: 2rem 0; padding: 2rem; border-radius: 32px; color: white; background: radial-gradient(circle at right, rgba(242,184,75,.42), transparent 22rem), linear-gradient(135deg, var(--navy), var(--teal-dark)); box-shadow: var(--shadow); }
.quote-band p { font-size: clamp(1.35rem, 3vw, 2.2rem); font-weight: 900; letter-spacing: -.04em; line-height: 1.05; margin: 0; }
.quote-band small { display: block; margin-top: .9rem; color: rgba(255,255,255,.78); font-weight: 800; }
.tabs { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1rem; }
.tab-btn { border: 1px solid var(--line); background: rgba(255,255,255,.72); border-radius: 999px; padding: .65rem .85rem; font-weight: 900; color: var(--navy); cursor: pointer; }
.tab-btn.active { background: var(--navy); color: white; border-color: var(--navy); }
.lesson-panel { display: none; }
.lesson-panel.active { display: block; }
.lesson-body { display: grid; grid-template-columns: minmax(0, .9fr) minmax(280px, .55fr); gap: 1rem; align-items: start; }
.mini-table { width: 100%; border-collapse: collapse; overflow: hidden; border-radius: 18px; font-size: .94rem; }
.mini-table th, .mini-table td { border-bottom: 1px solid rgba(18,48,71,.12); text-align: left; padding: .72rem .7rem; vertical-align: top; }
.mini-table th { background: rgba(18,48,71,.07); color: var(--navy); }
.mini-table tr:last-child td { border-bottom: 0; }
.toolbox { background: rgba(255,255,255,.78); border: 1px solid var(--line); border-radius: 32px; box-shadow: var(--shadow); overflow: hidden; }
.toolbox-head { padding: 1.2rem; background: linear-gradient(135deg, rgba(18,48,71,.08), rgba(19,169,165,.12)); border-bottom: 1px solid var(--line); }
.toolbox-body { padding: 1.2rem; }
.search-row { display: grid; grid-template-columns: 1fr auto; gap: .75rem; margin-bottom: 1rem; }
input, select, textarea { width: 100%; border: 1px solid rgba(18,48,71,.22); border-radius: 16px; padding: .82rem .95rem; background: white; color: var(--ink); font: inherit; }
input:focus, select:focus, textarea:focus { outline: 3px solid rgba(19,169,165,.18); border-color: var(--teal); }
.vocab-results { display: grid; gap: .6rem; max-height: 460px; overflow: auto; padding-right: .35rem; }
.word-row { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem; padding: .75rem; border-radius: 18px; background: rgba(234,246,245,.58); border: 1px solid rgba(19,169,165,.14); }
.word-row b { color: var(--navy); }
.word-row small { color: var(--muted); display: block; }
.flashcard { min-height: 230px; display: grid; place-items: center; text-align: center; background: linear-gradient(135deg, white, var(--soft)); border: 1px solid var(--line); border-radius: 28px; padding: 1.5rem; cursor: pointer; user-select: none; }
.flashcard .term { font-size: clamp(2.2rem, 6vw, 4rem); font-weight: 950; letter-spacing: -.06em; color: var(--navy); }
.flashcard .hint { color: var(--muted); margin-top: .4rem; }
.tool-actions { display: flex; flex-wrap: wrap; gap: .65rem; margin-top: .9rem; }
.quiz-option { width: 100%; text-align: left; border: 1px solid var(--line); background: white; padding: .8rem .95rem; border-radius: 16px; margin: .35rem 0; font-weight: 800; cursor: pointer; }
.quiz-option.correct { background: rgba(19,169,165,.15); border-color: rgba(19,169,165,.45); }
.quiz-option.wrong { background: rgba(220,70,70,.12); border-color: rgba(220,70,70,.35); }
.builder-output { margin-top: 1rem; border: 1px solid var(--line); background: rgba(255,255,255,.74); border-radius: 18px; padding: 1rem; min-height: 70px; font-weight: 900; color: var(--navy); }
.download-card { display: flex; flex-direction: column; min-height: 100%; }
.download-card p { flex: 1; }
.download-actions { display: flex; flex-wrap: wrap; gap: .55rem; }
.badge { display: inline-flex; width: max-content; border-radius: 999px; padding: .28rem .55rem; background: rgba(242,184,75,.25); color: #704500; font-weight: 950; font-size: .78rem; margin-bottom: .65rem; }
.audio-box { display: grid; grid-template-columns: 1fr auto; gap: .75rem; align-items: center; border: 1px solid var(--line); border-radius: 18px; padding: .8rem; background: rgba(255,255,255,.66); margin: .6rem 0; }
.audio-box b { color: var(--navy); }
.audio-box small { color: var(--muted); display: block; }
.footer { margin-top: 3rem; background: var(--navy-2); color: white; }
.footer-inner { max-width: 1180px; margin: 0 auto; padding: 2.2rem 1.25rem; display: grid; grid-template-columns: 1fr auto; gap: 1rem; align-items: center; }
.footer a { color: white; }
.footer p { margin: .35rem 0 0; color: rgba(255,255,255,.72); }
.to-top { position: fixed; right: 1rem; bottom: 1rem; width: 46px; height: 46px; border-radius: 999px; border: 0; background: var(--navy); color: white; box-shadow: 0 12px 32px rgba(8,30,45,.3); cursor: pointer; display: none; font-weight: 950; }
.to-top.show { display: block; }
.note { border-left: 5px solid var(--gold); background: rgba(255,248,234,.9); border-radius: 16px; padding: .9rem 1rem; color: #4e3a18; }
@media (max-width: 900px) {
  .hero, .lesson-body, .grid-2, .grid-3, .footer-inner { grid-template-columns: 1fr; }
  .hero { padding-top: 3rem; }
  nav ul { display: none; }
  .search-row { grid-template-columns: 1fr; }
  .word-row { grid-template-columns: 1fr; }
  .audio-box { grid-template-columns: 1fr; }
}
@media print {
  header, .to-top, .actions, .toolbox, .btn { display: none !important; }
  body { background: white; color: black; }
  main section { padding: 1rem 0; }
  .card, .quote-band { box-shadow: none; break-inside: avoid; }
  .quote-band { color: black; background: white; border: 1px solid #999; }
}


/* Multi-page additions */
nav a.active { background: rgba(19, 169, 165, .15); color: var(--teal-dark); }
.compact-hero { padding-top: 4rem; padding-bottom: 2rem; }
.download-actions { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: .8rem; }
.tall-results { max-height: 680px; }
.copyright { max-width: 72ch; font-size: .82rem; line-height: 1.45; color: rgba(255,255,255,.62) !important; }
@media (max-width: 900px) { nav ul { display: flex; font-size: .85rem; } .nav { align-items: flex-start; flex-direction: column; } }

.notice-card { margin-bottom: 1.25rem; }
.notice-card h3 { margin-top: 0; }


/* Core 1500 searchable dictionary */
.dictionary-controls { display: grid; grid-template-columns: 1fr minmax(180px, 240px) auto auto; gap: .75rem; align-items: center; margin-bottom: 1rem; }
.dictionary-status { display: flex; flex-wrap: wrap; gap: .65rem; align-items: center; justify-content: space-between; margin: .8rem 0 1rem; }
.dictionary-results { display: grid; gap: .75rem; }
.dictionary-result { border: 1px solid rgba(19,169,165,.16); background: rgba(234,246,245,.58); border-radius: 20px; padding: .9rem 1rem; }
.dictionary-main { display: grid; grid-template-columns: minmax(130px, .35fr) 1fr; gap: .75rem; align-items: baseline; }
.dictionary-main h3 { margin: 0; color: var(--navy); font-size: 1.35rem; letter-spacing: -.03em; }
.dictionary-main p { margin: 0; font-weight: 850; }
.dictionary-meta { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .65rem; }
.dictionary-meta span { border-radius: 999px; background: rgba(255,255,255,.72); border: 1px solid rgba(18,48,71,.12); padding: .25rem .52rem; color: var(--muted); font-size: .78rem; font-weight: 850; }
.dictionary-example { margin: .65rem 0 0; color: var(--muted); font-style: italic; }
@media (max-width: 900px) { .dictionary-controls, .dictionary-main { grid-template-columns: 1fr; } }

/* Android app beta page */
.app-hero { align-items: center; }
.app-hero-card { background: linear-gradient(135deg, rgba(18,48,71,.08), rgba(19,169,165,.16)); padding: 1.2rem; display: flex; justify-content: center; }
.app-phone-preview { width: min(340px, 100%); margin: 0 auto; border-radius: 36px; padding: .6rem; background: #0a2032; box-shadow: 0 28px 65px rgba(8,30,45,.32); }
.app-phone-preview img { display: block; width: 100%; height: auto; border-radius: 28px; border: 1px solid rgba(255,255,255,.2); }
.app-pills { justify-content: center; margin-top: 1.2rem; }
.screenshot-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; align-items: start; }
.phone-shot { margin: 0; background: rgba(255,255,255,.74); border: 1px solid var(--line); border-radius: 30px; padding: .85rem; box-shadow: 0 16px 42px rgba(8,30,45,.1); }
.phone-shot img { display: block; width: 100%; max-width: 360px; margin: 0 auto; height: auto; border-radius: 24px; border: 1px solid rgba(18,48,71,.14); background: #fff8ea; }
.phone-shot figcaption { margin-top: .7rem; text-align: center; color: var(--navy); font-weight: 900; }
.install-list { margin: .5rem 0 0; padding-left: 1.25rem; color: var(--muted); }
.install-list li { margin: .4rem 0; }
.app-download-card p { color: var(--muted); }
.app-feedback { margin-bottom: 1rem; }
@media (max-width: 980px) { .screenshot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .screenshot-grid { grid-template-columns: 1fr; } .phone-shot img { max-width: 300px; } }

/* v1.6 app page: compact, dynamic screenshot gallery */
.app-screenshot-note { max-width: 760px; }
.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  align-items: stretch;
}
.phone-shot {
  position: relative;
  overflow: hidden;
  padding: .55rem .55rem .8rem;
  border-radius: 24px;
  transition: transform .18s ease, box-shadow .18s ease;
}
.phone-shot:hover {
  transform: translateY(-4px) rotate(-.4deg);
  box-shadow: 0 22px 50px rgba(8,30,45,.14);
}
.phone-shot:nth-child(even):hover { transform: translateY(-4px) rotate(.4deg); }
.phone-shot img {
  max-width: 190px;
  border-radius: 20px;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top center;
}
.phone-shot figcaption {
  margin-top: .55rem;
  font-size: .88rem;
}
@media (min-width: 980px) {
  .screenshot-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .phone-shot:nth-child(2), .phone-shot:nth-child(5) { transform: translateY(14px); }
  .phone-shot:nth-child(3), .phone-shot:nth-child(6) { transform: translateY(-4px); }
  .phone-shot:hover { transform: translateY(-8px) rotate(-.6deg); }
  .phone-shot:nth-child(even):hover { transform: translateY(-8px) rotate(.6deg); }
}
@media (max-width: 760px) {
  .screenshot-grid {
    display: flex;
    overflow-x: auto;
    gap: .85rem;
    scroll-snap-type: x mandatory;
    padding: .25rem .1rem 1rem;
    margin-inline: -.15rem;
    -webkit-overflow-scrolling: touch;
  }
  .phone-shot {
    flex: 0 0 170px;
    scroll-snap-align: start;
  }
  .phone-shot img { max-width: 145px; }
  .phone-shot figcaption { font-size: .8rem; }
}


/* v1.7 app page fixes: compact screenshot rail and navigation consistency */
.app-page .screenshot-grid,
#screenshots .screenshot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(138px, 1fr));
  gap: 0.95rem;
  align-items: stretch;
}
.app-page .phone-shot,
#screenshots .phone-shot {
  padding: .55rem .55rem .75rem;
  border-radius: 24px;
  background: rgba(255,255,255,.82);
  border: 1px solid var(--line);
  box-shadow: 0 12px 30px rgba(8,30,45,.10);
}
.app-page .phone-shot img,
#screenshots .phone-shot img {
  width: 100%;
  max-width: 175px;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top center;
  border-radius: 18px;
  margin: 0 auto;
  display: block;
}
.app-page .phone-shot figcaption,
#screenshots .phone-shot figcaption {
  font-size: .86rem;
  line-height: 1.25;
  margin-top: .55rem;
}
@media (min-width: 980px) {
  .app-page .screenshot-grid,
  #screenshots .screenshot-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .app-page .phone-shot:nth-child(2), #screenshots .phone-shot:nth-child(2),
  .app-page .phone-shot:nth-child(5), #screenshots .phone-shot:nth-child(5) { transform: translateY(12px); }
  .app-page .phone-shot:nth-child(3), #screenshots .phone-shot:nth-child(3),
  .app-page .phone-shot:nth-child(6), #screenshots .phone-shot:nth-child(6) { transform: translateY(-4px); }
}
@media (max-width: 760px) {
  .app-page .screenshot-grid,
  #screenshots .screenshot-grid {
    display: flex !important;
    overflow-x: auto;
    gap: .85rem;
    scroll-snap-type: x mandatory;
    padding: .25rem .1rem 1rem;
    -webkit-overflow-scrolling: touch;
  }
  .app-page .phone-shot,
  #screenshots .phone-shot {
    flex: 0 0 160px;
    scroll-snap-align: start;
  }
  .app-page .phone-shot img,
  #screenshots .phone-shot img { max-width: 135px; }
}