:root {
  color-scheme: light;
  --navy: #07083a; --blue: #184eb4; --blue-dark: #123c8c; --sky: #3b9fe0; --red: #b81c14; --red-dark: #93160f;
  --paper: #f5f7fb; --card: #ffffff; --ink: var(--navy); --muted: #565c78; --line: #dde2ee;
  --accent: var(--blue); --accent-dark: var(--blue-dark); --ok: #1c7048; --ok-bg: #e4f3ea; --bad: #a8180f; --bad-bg: #fdeceb;
  --heading: "Avenir Next", Avenir, Montserrat, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius: 10px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { margin: 0; min-height: 100vh; display: flex; flex-direction: column; background: var(--paper); color: var(--ink); font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
h1, h2, h3 { font-family: var(--heading); font-weight: 700; letter-spacing: -.01em; line-height: 1.2; margin: 1.4em 0 .5em; }
h1 { font-size: 2.1rem; margin-top: .3em; } h2 { font-size: 1.5rem; } h3 { font-size: 1.15rem; }
a { color: var(--accent-dark); }
code { background: #e9edf7; padding: .1em .35em; border-radius: 4px; font-size: .85em; overflow-wrap: anywhere; }
small { font-size: .82em; }
.muted { color: var(--muted); font-weight: 400; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.eyebrow { text-transform: uppercase; letter-spacing: .09em; font-size: .76rem; color: var(--blue); font-weight: 650; margin: 0; }

.topbar { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 4px 16px; padding: 7px 20px; background: #fff; color: var(--navy); border-bottom: 3px solid; border-image: linear-gradient(to right, var(--red) 50%, var(--blue) 50%) 1; }
.brand { display: flex; align-items: center; gap: 8px; text-decoration: none; }
.brand img { display: block; height: 44px; width: auto; }
.topnav { display: flex; align-items: center; flex-wrap: wrap; gap: 2px 16px; font-size: .92rem; }
.topnav a, .linklike { color: var(--navy); font-weight: 550; background: none; border: 0; padding: 0; font: inherit; cursor: pointer; text-decoration: none; }
.topnav a:hover, .linklike:hover { text-decoration: underline; }
.linklike.danger { color: var(--bad); font-size: .85rem; }

.page, .lesson-page, .narrow, .narrow-wide { flex: 1 0 auto; width: 100%; margin: 0 auto; padding: 24px 16px 72px; }
.page { max-width: 960px; } .lesson-page, .narrow-wide { max-width: 760px; } .narrow { max-width: 480px; }

.flash { padding: 10px 14px; border-radius: var(--radius); margin: 0 0 16px; }
.flash-ok { background: var(--ok-bg); color: #14573a; } .flash-error { background: var(--bad-bg); color: #7f140d; }

.btn { display: inline-block; background: var(--accent); color: #fff; border: 1px solid var(--accent); border-radius: 8px; padding: 10px 20px; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.btn:hover { background: var(--accent-dark); }
.btn-quiet { background: transparent; color: var(--accent-dark); }
.btn-quiet:hover { background: #e8eefb; }
.btn-sm { padding: 5px 12px; font-size: .88rem; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible { outline: 3px solid #3b9fe0; outline-offset: 2px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.card h2 { margin-top: 0; }
.stack { display: flex; flex-direction: column; gap: 14px; align-items: stretch; }
.stack > .btn { align-self: flex-start; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin: 10px 0; }
label { display: block; font-weight: 550; font-size: .95rem; }
input[type=text], input[type=email], input[type=password], select, textarea { width: 100%; font: inherit; font-size: 16px; padding: 9px 11px; border: 1px solid #bcc4d8; border-radius: 7px; background: #fff; color: var(--ink); margin-top: 4px; }
input[type=file] { font-size: .9rem; max-width: 100%; }
fieldset.plain { border: 0; padding: 0; margin: 0; } fieldset.plain legend { font-weight: 550; font-size: .95rem; padding: 0; }

.next-step { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; background: var(--navy); color: #fff; border-radius: 14px; padding: 22px 24px; }
.next-step h2 { margin: .2em 0; font-size: 1.45rem; } .next-step p { margin: 0; } .next-step .eyebrow { color: #9cc6f0; } .next-step .btn { background: var(--red); border-color: var(--red); } .next-step .btn:hover { background: var(--red-dark); }
.level { margin-top: 36px; }
.level-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 4px 14px; }
.level-head h2 { margin: 0; } .level-head .muted { font-size: .9rem; }
.bar { height: 8px; background: var(--line); border-radius: 8px; overflow: hidden; margin: 8px 0 14px; }
.bar span { display: block; height: 100%; background: var(--blue); }
.module { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 10px; }
.module summary { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 13px 16px; cursor: pointer; font-weight: 600; }
.module.is-locked summary { color: var(--muted); }
.chip { display: inline-block; flex: none; font-size: .78rem; font-weight: 600; padding: 2px 9px; border-radius: 99px; background: #e6eaf4; color: #2f3560; margin: 0; }
.chip-ok { background: var(--ok-bg); color: #14573a; }
.pad { padding: 0 16px 14px; margin: 0; }
.lesson-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.lesson-list li + li { border-top: 1px solid #eaedf5; }
.lesson-list a, .row-disabled { display: flex; align-items: center; gap: 12px; padding: 10px 16px; color: inherit; text-decoration: none; }
.lesson-list a:hover { background: #f0f4fc; }
.lesson-list strong { display: block; font-weight: 600; } .lesson-list small { color: var(--muted); }
.row-disabled { color: var(--muted); }
.check { flex: none; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; font-size: .85rem; font-weight: 700; background: #e6eaf4; color: #2f3560; }
.check.done { background: var(--ok); color: #fff; } .check.exam { background: #fbe3e1; color: var(--red); } .check.exam.done { background: var(--ok); color: #fff; }
.score { margin-left: auto; font-size: .85rem; color: var(--ok); font-weight: 600; }

.crumbs { font-size: .88rem; color: var(--muted); margin-bottom: 14px; }
.lead { font-size: 1.1rem; }
.toc { position: sticky; top: 61px; z-index: 5; display: flex; gap: 16px; overflow-x: auto; background: var(--paper); border-block: 1px solid var(--line); padding: 8px 2px; font-size: .9rem; margin: 18px 0; }
.toc a { white-space: nowrap; text-decoration: none; font-weight: 550; }
.prose table, table { border-collapse: collapse; width: 100%; font-size: .95rem; background: var(--card); }
th, td { border: 1px solid var(--line); padding: 7px 10px; text-align: left; vertical-align: top; }
th { background: #eaeef8; font-weight: 650; }
.table-wrap, .prose { overflow-x: auto; }
.row-off { opacity: .55; }
.vocab { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 8px; margin: 0; }
.vocab div { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; }
.vocab dt { font-weight: 650; } .vocab dd { margin: 0; color: var(--muted); font-size: .92rem; }
.audio-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 12px; }
.audio-card h3 { margin: 0 0 8px; }
.audio-card p:last-child { margin-bottom: 0; }
audio { width: 100%; display: block; }
.speed { display: flex; gap: 4px; margin: 8px 0 12px; }
.speed button { border: 1px solid #bcc4d8; background: #fff; border-radius: 6px; padding: 3px 10px; font-size: .85rem; cursor: pointer; }
.speed button.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.feedback { background: var(--ok-bg); padding: 10px 14px; border-radius: 8px; margin-top: 12px; white-space: pre-wrap; }
.transcript { margin-top: 12px; } .transcript p { white-space: pre-wrap; background: #f0f3fa; padding: 10px; border-radius: 6px; }

.q { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--line); border-radius: 8px; padding: 12px 16px 14px; margin: 0; min-width: 0; }
.q legend { float: left; width: 100%; padding: 0; margin-bottom: 8px; font-weight: 550; }
.q legend + * { clear: both; }
.q-n { display: inline-block; min-width: 1.5em; color: var(--blue); font-weight: 700; }
.q-ok { border-left-color: var(--ok); } .q-bad { border-left-color: var(--bad); }
.q-feedback { margin: 10px 0 0; font-size: .92rem; } .q-ok .q-feedback { color: var(--ok); } .q-bad .q-feedback { color: var(--bad); }
.opt { display: flex; gap: 8px; align-items: baseline; font-weight: 400; padding: 3px 0; }
.tokens { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.token, .token-clear { font: inherit; font-size: .95rem; padding: 4px 11px; border-radius: 6px; cursor: pointer; }
.token { background: #fff; border: 1px solid #aab3cb; } .token:disabled { opacity: .35; cursor: default; }
.token-clear { background: none; border: 0; color: var(--accent-dark); text-decoration: underline; }
.match { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 10px; }
.pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 44px; padding-top: 16px; border-top: 1px solid var(--line); font-weight: 550; }
.pager a:last-child { text-align: right; }

.facts { list-style: none; padding: 0; } .facts li { padding: 7px 0; border-bottom: 1px solid var(--line); }
.result { display: flex; align-items: center; gap: 18px; padding: 16px 20px; border-radius: 12px; margin: 14px 0; }
.result-ok { background: var(--ok-bg); } .result-bad { background: var(--bad-bg); }
.result-score { font-family: var(--heading); font-size: 2.6rem; font-weight: 700; line-height: 1; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; color: inherit; text-decoration: none; }
.stat strong { display: block; font-size: 1.5rem; font-family: var(--heading); }
.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.tabs a { padding: 5px 13px; border-radius: 99px; text-decoration: none; background: #e6eaf4; color: var(--ink); font-size: .92rem; }
.tabs a.on { background: var(--ink); color: #fff; }
.audio-admin h3 { margin: 22px 0 8px; }
.slot { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; margin-bottom: 8px; }
.slot-head { display: flex; align-items: center; flex-wrap: wrap; gap: 4px 10px; margin-bottom: 6px; }
.slot .chip { margin-left: auto; }
.writing { margin-bottom: 14px; } .writing h3 { margin: 0; } .writing blockquote { margin: 10px 0; padding: 8px 14px; border-left: 3px solid var(--line); white-space: pre-wrap; background: #f2f5fb; }
.plain-list { padding-left: 18px; }

.warm-banner { display: flex; justify-content: space-between; align-items: center; gap: 12px; background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--red); border-radius: var(--radius); padding: 12px 16px; margin-top: 14px; color: inherit; text-decoration: none; }
.warm-banner:hover { background: #f0f4fc; } .warm-banner.is-done { border-left-color: var(--ok); }
.warm-banner strong { display: block; } .warm-banner small { color: var(--muted); }
.warm-controls { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; margin: 14px 0; }
.warm-controls label { flex: 1 1 200px; max-width: 320px; }
.warm-result { margin: 14px 0; } .warm-result ul { margin: 6px 0; padding-left: 18px; } .warm-result p { margin: 6px 0 0; }
.letters { display: grid; grid-template-columns: repeat(auto-fill, minmax(70px, 1fr)); gap: 8px; }
.letter, .digit { font: inherit; background: var(--card); color: var(--navy); border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
.letter { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 9px 4px; }
.letter strong { font-family: var(--heading); font-size: 1.4rem; line-height: 1.1; } .letter small { color: var(--muted); font-size: .72rem; white-space: nowrap; }
.letter:hover, .digit:hover { background: #e8eefb; border-color: var(--blue); }
.digits { display: grid; grid-template-columns: repeat(auto-fill, minmax(56px, 1fr)); gap: 6px; }
.digit { padding: 8px 2px; font-family: var(--heading); font-weight: 700; }
.reveal { margin-top: 8px; font-size: .95rem; } .reveal summary { cursor: pointer; color: var(--blue); font-weight: 550; width: fit-content; }
.reveal p { margin: 6px 0; }
.words-list { list-style: none; padding: 0; margin: 8px 0 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 2px 14px; font-size: .92rem; } .words-list strong { display: inline-block; min-width: 2.6em; }
.warm-list { list-style: none; counter-reset: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.warm-list > li, .warm-date { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 12px 16px; }
.warm-date { display: block; }
.warm-prompt { display: block; font-family: var(--heading); font-size: 1.7rem; font-weight: 700; line-height: 1.2; overflow-wrap: anywhere; }
.say { font: inherit; font-size: .85rem; background: #fff; color: var(--blue-dark); border: 1px solid var(--blue); border-radius: 6px; padding: 3px 11px; cursor: pointer; }
.say:hover { background: #e8eefb; }
.warm-actions { margin: 26px 0; }
.warm-rate { padding: 10px 0; border-bottom: 1px solid var(--line); } .warm-rate .opt { display: inline-flex; margin-right: 18px; }
#avaliar h2 { margin-top: 0; } .warm-finish { margin-top: 18px; }

.attempt { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 16px; margin: 10px 0; }
.attempt > summary { cursor: pointer; font-weight: 600; }
.attempt-summary { margin: 12px 0; }
.attempt-form .q { background: #fbfcfe; }
.chip-new { background: #fbe3e1; color: var(--red-dark); }

.lesson-send { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; margin-top: 22px; padding: 14px 16px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.lesson-send p { margin: 0; flex: 1 1 240px; font-size: .92rem; }
.lesson-form textarea { margin-top: 0; }

.live-banner { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 12px; padding: 11px 20px; background: var(--red); color: #fff; text-decoration: none; }
.live-banner[hidden] { display: none; }
.live-banner:hover { background: var(--red-dark); }
.live-dot { flex: none; width: 10px; height: 10px; border-radius: 50%; background: #fff; }
.live-enter { margin-left: auto; font-weight: 700; text-decoration: underline; }
.live-page { flex: 1 0 auto; width: 100%; max-width: 1280px; margin: 0 auto; padding: 14px 16px 40px; }
.live-head { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px 16px; margin-bottom: 12px; }
.live-head h1 { font-size: 1.4rem; margin: 2px 0 0; }
.btn-end { background: var(--red); border-color: var(--red); } .btn-end:hover { background: var(--red-dark); }
.live-call { position: relative; height: calc(100vh - 190px); min-height: 420px; background: var(--navy); border-radius: var(--radius); overflow: hidden; }
.live-message { position: absolute; inset: 0; z-index: 1; display: grid; place-items: center; margin: 0; padding: 20px; color: #fff; text-align: center; pointer-events: none; }
.live-message[hidden] { display: none; }
.live-call.has-error .live-message { background: var(--navy); pointer-events: auto; }
.live-tools { margin-top: 20px; } .live-tools h2 { margin-top: 0; font-size: 1.15rem; }
.live-student { display: flex; flex-wrap: wrap; gap: 4px 16px; padding: 8px 0; border-bottom: 1px solid var(--line); }

.group-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; }
.group-card { display: block; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; color: inherit; text-decoration: none; }
.group-card:hover { background: #f0f4fc; border-color: var(--blue); } .group-card strong { display: block; }
.group-start { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 12px; margin-bottom: 8px; } .group-start label { flex: 1 1 260px; }
.group-rename { flex: 1 1 260px; max-width: 420px; }

@media (max-width: 560px) {
  body { font-size: 16px; } h1 { font-size: 1.75rem; }
  .topbar { padding: 6px 16px; position: static; gap: 4px 10px; } .brand { gap: 6px; } .brand img { height: 36px; } .topnav { gap: 2px 12px; font-size: .88rem; }
  .toc { top: 0; gap: 10px; font-size: .84rem; scrollbar-width: none; } .toc::-webkit-scrollbar { display: none; } html { scroll-padding-top: 52px; }
  .next-step { padding: 18px; } .next-step .btn { width: 100%; text-align: center; }
  .result { padding: 14px; gap: 12px; } .result-score { font-size: 2rem; }
}

.slogan { display: flex; align-items: center; justify-content: center; gap: 10px; color: var(--navy); font-family: var(--heading); font-weight: 600; letter-spacing: .02em; text-align: center; margin: 0; }
.slogan::before, .slogan::after { content: ""; flex: none; width: 26px; height: 3px; border-radius: 2px; }
.slogan::before { background: var(--red); } .slogan::after { background: var(--blue); }
.login-brand { background: #fff; border: 1px solid var(--line); border-bottom: 0; border-radius: var(--radius) var(--radius) 0 0; padding: 22px 18px 16px; }
.login-brand img { display: block; width: min(230px, 70%); height: auto; margin: 0 auto 14px; }
.login-brand + form.card { border-radius: 0 0 var(--radius) var(--radius); border-top: 1px solid var(--line); }
.narrow h1.login-title { font-size: 1.3rem; margin: 22px 0 10px; }
.site-foot { background: var(--navy); color: #fff; padding: 20px 16px; }
.site-foot .slogan { color: #fff; font-size: .95rem; }
.site-foot small { display: block; text-align: center; color: #b8c2e0; margin-top: 4px; }
.chip-admin { background: var(--navy); color: #fff; }
.chip-teacher { background: #dbe7fb; color: var(--blue-dark); }
h1 .chip { vertical-align: middle; font-family: inherit; letter-spacing: 0; }
.hint { margin: -4px 0 0; font-size: .9rem; }