/* EstoFlow — палитра из логотипа-бабочки */
:root {
  --navy: #0b2545;
  --blue: #0b86e6;
  --sky: #24a2dd;
  --teal: #00b4cb;
  --mint: #62ebd1;
  --ice: #e6f7fd;

  --bg: #f4fbfe;
  --card: #ffffff;
  --text: #0b2545;
  --muted: #5b7088;
  --line: #dbeaf3;
  --ok: #12a37a;
  --ok-bg: #e3f8f0;
  --bad: #d64545;
  --bad-bg: #fdecec;
  --grad: linear-gradient(135deg, #0b86e6 0%, #00b4cb 60%, #62ebd1 100%);
  --shadow: 0 4px 18px rgba(11, 37, 69, .07);
  --radius: 18px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #071a30;
    --card: #0d2542;
    --text: #e8f4fb;
    --muted: #93aac2;
    --line: #1c3a5c;
    --ice: #10304f;
    --ok-bg: #0f3b33;
    --bad-bg: #3f1d24;
    --shadow: 0 4px 18px rgba(0, 0, 0, .3);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 16px;
}
a { color: var(--blue); text-decoration: none; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.2rem; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }

/* ----- каркас ----- */
.app { max-width: 560px; margin: 0 auto; padding: 16px 16px 96px; }
.app.wide { max-width: 1000px; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.15rem; color: var(--text); }
.brand img { width: 34px; height: 34px; border-radius: 10px; }
.brand b { color: var(--teal); font-weight: 700; }

.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 10;
  display: flex; justify-content: center;
  background: var(--card); border-top: 1px solid var(--line);
  padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
}
.tabbar nav { display: flex; width: 100%; max-width: 560px; }
.tabbar a {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 6px 0; font-size: .75rem; color: var(--muted); border-radius: 12px;
}
.tabbar a span { font-size: 1.35rem; line-height: 1; }
.tabbar a.on { color: var(--blue); font-weight: 600; background: var(--ice); }

/* ----- карточки ----- */
.card {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px; margin-bottom: 14px; border: 1px solid var(--line);
}
.card.hero { background: var(--grad); color: #fff; border: 0; }
.card.hero .muted { color: rgba(255, 255, 255, .85); }
.card.link { display: block; color: var(--text); transition: transform .15s; }
.card.link:active { transform: scale(.98); }
.row { display: flex; align-items: center; gap: 14px; }
.row .grow { flex: 1; min-width: 0; }
.emoji { font-size: 1.8rem; width: 48px; height: 48px; display: grid; place-items: center; background: var(--ice); border-radius: 14px; flex: none; }
.chev { color: var(--muted); font-size: 1.3rem; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.stat { text-align: center; padding: 14px 8px; }
.stat .num { font-size: 1.8rem; font-weight: 700; }

.pill { display: inline-block; padding: 2px 10px; border-radius: 99px; font-size: .78rem; background: var(--ice); color: var(--blue); font-weight: 600; }
.pill.ok { background: var(--ok-bg); color: var(--ok); }
.pill.off { background: var(--bad-bg); color: var(--bad); }

/* полоса прогресса */
.bar { height: 10px; background: var(--ice); border-radius: 99px; overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--grad); border-radius: 99px; }
.skill { margin: 12px 0; }
.skill .head { display: flex; justify-content: space-between; font-size: .9rem; margin-bottom: 4px; }

/* мини-график активности */
.days { display: flex; align-items: flex-end; gap: 4px; height: 90px; }
.days div { flex: 1; background: var(--grad); border-radius: 6px 6px 2px 2px; min-height: 3px; opacity: .9; }
.days div.zero { background: var(--line); }
.days-labels { display: flex; justify-content: space-between; font-size: .72rem; color: var(--muted); margin-top: 4px; }

/* ----- кнопки и формы ----- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 0; border-radius: 14px; padding: 12px 18px; font: inherit; font-weight: 600;
  background: var(--blue); color: #fff; cursor: pointer; text-align: center;
}
.btn.full { width: 100%; }
.btn.light { background: var(--ice); color: var(--blue); }
.btn.white { background: #fff; color: var(--blue); }
.btn.danger { background: var(--bad-bg); color: var(--bad); }
.btn.small { padding: 7px 12px; font-size: .875rem; border-radius: 10px; }
.btn:disabled { opacity: .5; cursor: default; }

label { display: block; font-weight: 600; font-size: .9rem; margin: 12px 0 4px; }
input[type=text], input[type=password], input[type=number], input[type=url], select, textarea {
  width: 100%; padding: 12px 14px; font: inherit; color: var(--text);
  background: var(--card); border: 1.5px solid var(--line); border-radius: 12px;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--sky); }
textarea { min-height: 120px; resize: vertical; }
.check { display: flex; align-items: center; gap: 8px; font-weight: 500; }
.check input { width: 20px; height: 20px; }
.hint { font-size: .8rem; color: var(--muted); margin-top: 4px; }
.error { background: var(--bad-bg); color: var(--bad); padding: 10px 14px; border-radius: 12px; margin-bottom: 12px; }
.notice { background: var(--ok-bg); color: var(--ok); padding: 12px 14px; border-radius: 12px; margin-bottom: 14px; word-break: break-all; }

/* ----- вход ----- */
.auth { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.auth .card { width: 100%; max-width: 400px; padding: 28px 22px; }
.auth .logo { display: block; width: 150px; margin: 0 auto 10px; border-radius: 22px; }

/* ----- урок ----- */
.video { position: relative; padding-top: 56.25%; border-radius: var(--radius); overflow: hidden; background: #000; margin-bottom: 14px; }
.video iframe, .video video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.prose p, .prose ul, .prose ol, .prose table { margin: 0 0 .8em; }
.prose table { border-collapse: collapse; width: 100%; font-size: .92rem; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 6px 8px; text-align: left; }
.prose th { background: var(--ice); }
.prose code { background: var(--ice); padding: 1px 5px; border-radius: 6px; }

.ex { scroll-margin-top: 16px; }
.ex .q { font-weight: 600; margin-bottom: 10px; white-space: pre-line; }
.ex .opts { display: grid; gap: 8px; }
.ex .opt {
  text-align: left; padding: 12px 14px; border-radius: 12px; border: 1.5px solid var(--line);
  background: var(--card); font: inherit; color: var(--text); cursor: pointer;
}
.ex .opt.sel { border-color: var(--sky); background: var(--ice); }
.ex .opt.right { border-color: var(--ok); background: var(--ok-bg); }
.ex .opt.wrong { border-color: var(--bad); background: var(--bad-bg); }
.ex .feedback { margin-top: 10px; padding: 10px 14px; border-radius: 12px; display: none; }
.ex .feedback.ok { display: block; background: var(--ok-bg); color: var(--ok); }
.ex .feedback.bad { display: block; background: var(--bad-bg); color: var(--bad); }
.ex .feedback .expl { color: var(--text); margin-top: 4px; font-size: .9rem; }
.ex.done { border-color: var(--ok); }
.gap-row { display: flex; gap: 8px; }
.gap-row input { flex: 1; }

/* ----- админка ----- */
.admin-nav { display: flex; gap: 6px; flex-wrap: wrap; }
.admin-nav a { padding: 8px 14px; border-radius: 12px; color: var(--muted); font-weight: 600; }
.admin-nav a.on { background: var(--ice); color: var(--blue); }
table.list { width: 100%; border-collapse: collapse; }
table.list th, table.list td { padding: 10px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
table.list th { font-size: .8rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.table-wrap { overflow-x: auto; }
.inline-form { display: grid; grid-template-columns: 2fr 1fr auto; gap: 8px; align-items: end; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
.topic-form { display: grid; grid-template-columns: 60px 1fr 1fr 70px auto; gap: 8px; align-items: center; padding: 8px 0; border-bottom: 1px solid var(--line); }
.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
@media (max-width: 640px) {
  .inline-form, .form-grid { grid-template-columns: 1fr; }
  .topic-form { grid-template-columns: 52px 1fr; }
  .topic-form > :nth-child(n+3) { grid-column: span 2; }
}