/* ============ AgentLingo — Duolingo-style UI, own brand ============ */
:root {
  --orange: #F97316;
  --orange-dark: #C2580D;
  --orange-soft: #FFEDD5;
  --navy: #16324A;
  --navy-soft: #5B7A93;
  --cream: #FFFBF4;
  --card: #FFFFFF;
  --line: #E8E0D4;
  --green: #22C55E;
  --green-dark: #148A3E;
  --green-soft: #DCFCE7;
  --red: #EF4444;
  --red-dark: #B91C1C;
  --red-soft: #FEE2E2;
  --gold: #FFC800;
  --gold-dark: #D9A400;
  --blue: #0EA5E9;
  --purple: #8B5CF6;
  --radius: 16px;
  --font: 'Nunito', 'Segoe UI', system-ui, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { height: 100%; }
body {
  font-family: var(--font);
  background: var(--cream);
  color: var(--navy);
  min-height: 100%;
  font-weight: 700;
}
button { font-family: var(--font); cursor: pointer; border: none; background: none; color: inherit; }
input { font-family: var(--font); }

#app { max-width: 520px; margin: 0 auto; min-height: 100vh; display: flex; flex-direction: column; }

.screen { flex: 1; display: flex; flex-direction: column; padding: 16px 16px 96px; animation: fadeIn .25s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* ---------- Chunky buttons ---------- */
.btn {
  display: block; width: 100%;
  padding: 14px 20px;
  border-radius: var(--radius);
  font-weight: 900; font-size: 17px; letter-spacing: .4px;
  text-transform: uppercase;
  transition: filter .1s, transform .05s;
  text-align: center;
}
.btn:active { transform: translateY(3px); box-shadow: none !important; }
.btn-primary { background: var(--orange); color: #fff; box-shadow: 0 4px 0 var(--orange-dark); }
.btn-green { background: var(--green); color: #fff; box-shadow: 0 4px 0 var(--green-dark); }
.btn-ghost { background: var(--card); color: var(--orange); border: 2px solid var(--line); box-shadow: 0 4px 0 var(--line); }
.btn-gold { background: var(--gold); color: #7A5C00; box-shadow: 0 4px 0 var(--gold-dark); }
.btn:disabled { background: #E5E0D8; color: #A9A290; box-shadow: 0 4px 0 #CFC8BA; cursor: default; }
.btn + .btn { margin-top: 12px; }

/* ---------- Onboarding ---------- */
.ob { justify-content: center; text-align: center; gap: 18px; padding-bottom: 24px; }
.ob .mascot { width: 160px; margin: 0 auto; }
.ob h1 { font-size: 28px; font-weight: 900; }
.ob p.sub { color: var(--navy-soft); font-size: 17px; }
.ob .brand { font-weight: 900; color: var(--orange); }
.speech {
  background: var(--card); border: 2px solid var(--line); border-radius: 18px;
  padding: 14px 18px; font-size: 17px; position: relative; margin: 0 8px;
}
.speech:after {
  content: ''; position: absolute; top: -10px; left: 50%; margin-left: -8px;
  border: 8px solid transparent; border-bottom-color: var(--card); border-top: 0;
}
.choice-list { display: flex; flex-direction: column; gap: 10px; text-align: left; }
.choice-card {
  background: var(--card); border: 2px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; font-size: 16px; font-weight: 800; display: flex; gap: 12px; align-items: center;
  box-shadow: 0 3px 0 var(--line); width: 100%;
}
.choice-card.selected { border-color: var(--orange); background: var(--orange-soft); box-shadow: 0 3px 0 var(--orange); color: var(--orange-dark); }
.choice-card .em { font-size: 22px; }
input.datebox {
  width: 100%; padding: 14px; font-size: 17px; font-weight: 800; color: var(--navy);
  border: 2px solid var(--line); border-radius: var(--radius); background: var(--card);
}

/* ---------- Header / stat bar ---------- */
.statbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  background: var(--cream); padding: 10px 4px 8px; border-bottom: 2px solid var(--line);
  margin: -16px -16px 14px; padding-left: 16px; padding-right: 16px;
}
.stat { display: flex; align-items: center; gap: 5px; font-weight: 900; font-size: 15px; }
.stat .ico { font-size: 18px; }
.stat.streak { color: #FF6B00; }
.stat.xp { color: var(--gold-dark); }
.stat.hearts { color: var(--red); }
.exam-chip {
  background: var(--navy); color: #fff; border-radius: 999px; padding: 4px 10px;
  font-size: 12px; font-weight: 900;
}

/* ---------- Home path ---------- */
.unit-banner {
  border-radius: var(--radius); color: #fff; padding: 16px; margin: 18px 0 8px;
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  box-shadow: 0 4px 0 rgba(0,0,0,.18);
}
.unit-banner h2 { font-size: 18px; font-weight: 900; }
.unit-banner .desc { font-size: 13px; opacity: .92; font-weight: 700; }
.unit-banner .em { font-size: 30px; }
.path { display: flex; flex-direction: column; align-items: center; padding: 8px 0 4px; }
.node-row { display: flex; justify-content: center; width: 100%; }
.node-row.off-l { justify-content: flex-start; padding-left: 22%; }
.node-row.off-r { justify-content: flex-end; padding-right: 22%; }
.node {
  width: 70px; height: 70px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px; margin: 10px 0; position: relative;
  box-shadow: 0 6px 0 rgba(0,0,0,.15); border: none;
}
.node.done { background: var(--gold); box-shadow: 0 6px 0 var(--gold-dark); }
.node.active { background: var(--orange); box-shadow: 0 6px 0 var(--orange-dark); animation: pulse 1.6s infinite; }
.node.locked { background: #E5E0D8; box-shadow: 0 6px 0 #CFC8BA; filter: grayscale(1); opacity: .8; }
@keyframes pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.06); } }
.node .start-tip {
  position: absolute; top: -34px; left: 50%; transform: translateX(-50%);
  background: #fff; color: var(--orange); border: 2px solid var(--line);
  padding: 4px 12px; border-radius: 10px; font-size: 12px; font-weight: 900; letter-spacing: 1px;
  animation: bob 1.2s infinite;
}
@keyframes bob { 0%,100% { transform: translate(-50%,0); } 50% { transform: translate(-50%,-4px); } }
.lock-note { text-align: center; color: var(--navy-soft); font-size: 13px; margin: 4px 0 10px; }
.section-divider {
  display: flex; align-items: center; gap: 12px; margin: 26px 0 2px;
  font-size: 13px; font-weight: 900; letter-spacing: 2px; text-transform: uppercase; color: var(--navy-soft);
}
.section-divider:before, .section-divider:after { content: ''; flex: 1; height: 2px; background: var(--line); }

/* ---------- Bottom nav ---------- */
.tabbar {
  position: fixed; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 100%; max-width: 520px; background: #fff; border-top: 2px solid var(--line);
  display: flex; z-index: 30; padding-bottom: env(safe-area-inset-bottom);
}
.tab { flex: 1; padding: 10px 0 8px; text-align: center; font-size: 11px; font-weight: 900; color: var(--navy-soft); letter-spacing: .5px; }
.tab .ico { display: block; font-size: 22px; margin-bottom: 2px; }
.tab.on { color: var(--orange); }

/* ---------- Lesson ---------- */
.lesson-top { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.lesson-top .quit { font-size: 22px; color: var(--navy-soft); padding: 11px 12px; margin: -6px 0 -6px -8px; }
.progress-rail { flex: 1; height: 14px; background: #EDE6DA; border-radius: 999px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--green); border-radius: 999px; transition: width .3s ease; min-width: 8px; }
.lesson-hearts { font-weight: 900; color: var(--red); font-size: 15px; }
.q-prompt { font-size: 20px; font-weight: 900; margin: 6px 0 18px; line-height: 1.35; }
.q-tag { font-size: 12px; letter-spacing: 1.4px; font-weight: 900; color: var(--navy-soft); text-transform: uppercase; margin-bottom: 6px; }
.answers { display: flex; flex-direction: column; gap: 10px; }
.ans {
  background: var(--card); border: 2px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; font-size: 16px; font-weight: 800; text-align: left; width: 100%;
  box-shadow: 0 3px 0 var(--line); transition: all .1s;
}
.ans.selected { border-color: var(--blue); background: #E8F7FE; box-shadow: 0 3px 0 var(--blue); color: #0369A1; }
.ans.correct { border-color: var(--green); background: var(--green-soft); box-shadow: 0 3px 0 var(--green); color: var(--green-dark); }
.ans.wrong { border-color: var(--red); background: var(--red-soft); box-shadow: 0 3px 0 var(--red); color: var(--red-dark); }
.ans:disabled { opacity: .95; cursor: default; }
.tf-row { display: flex; gap: 10px; }
.tf-row .ans { text-align: center; }
input.fillbox {
  width: 100%; padding: 16px; font-size: 18px; font-weight: 800; color: var(--navy);
  border: 2px solid var(--line); border-radius: var(--radius); background: var(--card);
}
input.fillbox:focus { outline: none; border-color: var(--blue); }

/* match */
.match-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.match-col { display: flex; flex-direction: column; gap: 10px; }
.mbtn {
  background: var(--card); border: 2px solid var(--line); border-radius: 14px;
  padding: 12px 10px; font-size: 14px; font-weight: 800; min-height: 58px;
  box-shadow: 0 3px 0 var(--line); width: 100%;
}
.mbtn.selected { border-color: var(--blue); background: #E8F7FE; box-shadow: 0 3px 0 var(--blue); }
.mbtn.locked { border-color: var(--green); background: var(--green-soft); color: var(--green-dark); box-shadow: 0 3px 0 var(--green); opacity: .7; cursor: default; }
.mbtn.flash { animation: shake .3s; border-color: var(--red); background: var(--red-soft); }
@keyframes shake { 0%,100% { transform: translateX(0); } 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }

/* check footer */
.check-footer {
  position: fixed; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 100%; max-width: 520px; background: #fff; border-top: 2px solid var(--line);
  padding: 14px 16px calc(14px + env(safe-area-inset-bottom)); z-index: 40;
}
.check-footer.good { background: var(--green-soft); border-top-color: var(--green); }
.check-footer.bad { background: var(--red-soft); border-top-color: var(--red); }
.fb-head { display: flex; align-items: center; gap: 8px; font-size: 19px; font-weight: 900; margin-bottom: 4px; }
.check-footer.good .fb-head { color: var(--green-dark); }
.check-footer.bad .fb-head { color: var(--red-dark); }
.fb-exp { font-size: 14px; font-weight: 700; color: var(--navy); margin-bottom: 12px; line-height: 1.4; }

/* ---------- Results ---------- */
.results { justify-content: center; text-align: center; gap: 16px; }
.results .mascot { width: 130px; margin: 0 auto; }
.results h1 { font-size: 26px; font-weight: 900; }
.stat-cards { display: flex; gap: 10px; justify-content: center; }
.stat-card {
  border-radius: 14px; padding: 3px; min-width: 100px; color: #fff; font-weight: 900;
}
.stat-card .inner { background: #fff; border-radius: 12px; padding: 10px 8px 8px; }
.stat-card .lbl { font-size: 11px; letter-spacing: 1px; text-transform: uppercase; display:block; padding: 4px 0 5px; }
.stat-card .val { font-size: 22px; display: block; }
.sc-gold { background: var(--gold); } .sc-gold .val { color: var(--gold-dark); } .sc-gold .lbl { color: #6B5100; }
.sc-green { background: var(--green); } .sc-green .val { color: var(--green-dark); } .sc-green .lbl { color: #0B4D23; }
.sc-red { background: var(--red); } .sc-red .val { color: var(--red-dark); } .sc-red .lbl { color: #FFF5F5; text-shadow: 0 1px 0 rgba(0,0,0,.35); }

/* ---------- Paywall ---------- */
.paywall { text-align: center; gap: 14px; justify-content: center; }
.paywall .mascot { width: 120px; margin: 0 auto; }
.paywall h1 { font-size: 24px; font-weight: 900; }
.plan {
  background: var(--card); border: 2px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; text-align: left; display: flex; justify-content: space-between;
  align-items: center; box-shadow: 0 3px 0 var(--line); width: 100%;
}
.plan.best { border-color: var(--orange); box-shadow: 0 3px 0 var(--orange); }
.plan .name { font-weight: 900; font-size: 16px; }
.plan .per { color: var(--navy-soft); font-size: 13px; }
.plan .price { font-weight: 900; font-size: 18px; color: var(--orange-dark); }
.badge { background: var(--orange); color: #fff; font-size: 10px; font-weight: 900; padding: 3px 8px; border-radius: 999px; letter-spacing: 1px; }
.tiny { font-size: 12px; color: var(--navy-soft); }

/* ---------- Stats ---------- */
.panel {
  background: var(--card); border: 2px solid var(--line); border-radius: var(--radius);
  padding: 16px; margin-bottom: 14px;
}
.panel h3 { font-size: 15px; text-transform: uppercase; letter-spacing: 1px; color: var(--navy-soft); margin-bottom: 10px; }
.big-row { display: flex; gap: 12px; }
.big-row .panel { flex: 1; text-align: center; }
.big-num { font-size: 30px; font-weight: 900; }
.cal { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.cal .d { aspect-ratio: 1; border-radius: 8px; background: #EFE9DD; display:flex; align-items:center; justify-content:center; font-size: 10px; color: var(--navy-soft); }
.cal .d.hit { background: var(--gold); color: #7A5C00; font-weight: 900; }
.cal .d.today { outline: 2px solid var(--orange); }
.unit-prog { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.unit-prog .em { font-size: 22px; width: 28px; text-align: center; }
.unit-prog .nm { flex: 1; font-size: 14px; font-weight: 800; }
.unit-prog .rail { flex: 1.4; height: 12px; background: #EDE6DA; border-radius: 999px; overflow: hidden; }
.unit-prog .fill { height: 100%; border-radius: 999px; }
.unit-prog .pct { font-size: 12px; color: var(--navy-soft); width: 34px; text-align: right; }

/* ---------- Modal / toast / confetti ---------- */
.modal-wrap {
  position: fixed; inset: 0; background: rgba(22,50,74,.5); z-index: 60;
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal {
  background: #fff; border-radius: 20px; padding: 22px; max-width: 380px; width: 100%;
  text-align: center; animation: fadeIn .2s ease;
}
.modal h2 { font-size: 20px; margin-bottom: 8px; }
.modal p { font-weight: 700; color: var(--navy-soft); font-size: 15px; margin-bottom: 16px; }
#toast-root { position: fixed; top: 14px; left: 50%; transform: translateX(-50%); z-index: 80; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--navy); color: #fff; padding: 10px 18px; border-radius: 999px;
  font-weight: 900; font-size: 14px; animation: fadeIn .25s ease; box-shadow: 0 4px 14px rgba(0,0,0,.25);
}
.confetti-bit { position: fixed; top: -20px; z-index: 70; font-size: 22px; animation: drop linear forwards; pointer-events: none; }
@keyframes drop { to { transform: translateY(110vh) rotate(720deg); } }

.center { text-align: center; }
.mt-auto { margin-top: auto; }
.hidden { display: none !important; }

/* crawlable guide links below the app */
.seo-footer {
  max-width: 520px; margin: 0 auto; padding: 18px 16px 96px;
  font-size: 12px; color: var(--navy-soft); line-height: 2;
}
.seo-footer a { color: var(--navy-soft); font-weight: 700; }