/* ============================================================
   ЗусЕГЭ — тренажёр. CSS (без фреймворков, только к системным шрифтам)
   ============================================================ */
:root {
  --bg: #f4f5fb;
  --bg2: #ffffff;
  --ink: #23263b;
  --ink2: #61657e;
  --line: #e5e7f2;
  --accent: #6c5ce7;
  --accent-2: #0984e3;
  --good: #00b894;
  --bad: #ff7675;
  --good-bg: #e5f8f2;
  --bad-bg: #fdeceb;
  --shadow: 0 10px 30px -12px rgba(45, 40, 100, .18);
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14151d;
    --bg2: #1e2029;
    --ink: #eef0f8;
    --ink2: #9aa0b8;
    --line: #2c2f3e;
    --accent: #8b7cf7;
    --accent-2: #4ea3e8;
    --good: #2fd6a7;
    --bad: #ff8a89;
    --good-bg: #14352c;
    --bad-bg: #3b2322;
    --shadow: 0 10px 30px -12px rgba(0, 0, 0, .5);
  }
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(108,92,231,.14), transparent 60%),
    radial-gradient(700px 400px at -10% 10%, rgba(9,132,227,.10), transparent 60%),
    var(--bg);
  color: var(--ink);
  min-height: 100vh;
  line-height: 1.55;
}
a { color: inherit; text-decoration: none; }
code { background: var(--line); padding: .1em .35em; border-radius: 6px; font-size: .9em; }
button { font: inherit; color: inherit; cursor: pointer; border: none; background: none; }

/* ---------------- навигация ---------------- */
.topnav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.navin {
  max-width: 1040px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; gap: 18px; height: 58px;
}
.brand { font-weight: 800; font-size: 1.06rem; white-space: nowrap; letter-spacing: .2px; cursor: pointer; }
.brand span { color: var(--accent); }
.navlinks { display: flex; gap: 4px; overflow-x: auto; flex: 1; }
.navlinks a {
  padding: 7px 11px; border-radius: 10px; color: var(--ink2);
  font-size: .93rem; white-space: nowrap; cursor: pointer; transition: .15s;
}
.navlinks a:hover { color: var(--ink); background: var(--line); }
.navec { display: flex; align-items: center; gap: 8px; }
.uname { font-weight: 600; font-size: .92rem; }
.il { display: inline; }
.btn {
  display: inline-block; padding: 9px 15px; border-radius: 11px;
  font-size: .93rem; font-weight: 600; transition: .15s; cursor: pointer;
}
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border: none; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { color: var(--ink2); border: 1px solid var(--line); background: transparent; }
.btn.ghost:hover { color: var(--ink); border-color: var(--accent); }
.btn.sm { padding: 6px 11px; font-size: .84rem; border-radius: 9px; }
.btn.big { width: 100%; padding: 12px; font-size: 1rem; margin-top: 6px; }

.hero { max-width: 1040px; margin: 34px auto 6px; padding: 0 20px; text-align: center; }
.hero h1 { font-size: clamp(1.8rem, 4.2vw, 2.7rem); line-height: 1.2; letter-spacing: -.5px; }
.hero h1 span { background: linear-gradient(90deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { color: var(--ink2); margin-top: 10px; font-size: 1.02rem; }

/* ---------------- главная область ---------------- */
#main { max-width: 1040px; margin: 0 auto; padding: 22px 20px 60px; }
#page { animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; } }
.loading { color: var(--ink2); text-align: center; padding: 60px 0; }

/* ---------------- дашборд ---------------- */
.dash-hero { margin-bottom: 20px; }
.dash-hero h2 { font-size: 1.5rem; letter-spacing: -.3px; }
.dash-hero p { color: var(--ink2); margin-top: 4px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.scard {
  display: block; background: var(--bg2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow);
  transition: .18s; cursor: pointer;
}
.scard:hover { transform: translateY(-3px); border-color: var(--accent); }
.scard-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.task {
  font-size: .76rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent);
  padding: 4px 9px; border-radius: 20px;
}
.sc-count { color: var(--ink2); font-size: .82rem; font-weight: 600; }
.scard h3 { font-size: 1.08rem; margin-bottom: 3px; }
.scard p { color: var(--ink2); font-size: .88rem; margin-bottom: 14px; }
.bar { height: 7px; background: var(--line); border-radius: 20px; overflow: hidden; }
.bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 20px; transition: width .4s; }
.scard-foot { display: flex; justify-content: space-between; margin-top: 9px; color: var(--ink2); font-size: .78rem; }

/* ---------------- страница раздела / квиз ---------------- */
.qhead { display: flex; justify-content: space-between; align-items: flex-start; gap: 14px; margin-bottom: 18px; flex-wrap: wrap; }
.qhead h2 { font-size: 1.45rem; letter-spacing: -.3px; }
.qhead-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.muted { color: var(--ink2); font-size: .92rem; }
.qlayout { display: grid; grid-template-columns: 1fr 280px; gap: 20px; align-items: start; }
@media (max-width: 820px) { .qlayout { grid-template-columns: 1fr; } }
.stats-row {
  display: flex; gap: 18px; flex-wrap: wrap; padding: 12px 4px 16px;
  color: var(--ink2); font-size: .88rem;
}
.stats-row b { color: var(--ink); }

.qcard {
  background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 34px 28px 30px; animation: fade .22s ease;
}
.qlabel { font-size: .9rem; color: var(--ink2); margin-bottom: 22px; text-align: center; }
.word {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 6px;
  font-size: clamp(2rem, 6vw, 3.4rem); font-weight: 700; letter-spacing: .02em; margin: 10px 0 28px;
}
.word.small { font-size: clamp(1.1rem, 3vw, 1.5rem); flex-direction: column; gap: 2px; text-align: center; margin: 6px 0 2px; }
.phrase { text-align: center; font-size: clamp(1.5rem, 5vw, 2.2rem); font-weight: 700; margin: 14px 0 28px; }
.def { text-align: center; font-size: clamp(1.1rem, 3.5vw, 1.5rem); font-style: italic; margin: 8px 0 26px; line-height: 1.5; }
.letter {
  width: clamp(52px, 9vw, 76px); height: clamp(52px, 9vw, 76px);
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%; background: var(--bg2); border: 2px solid var(--line);
  font-size: clamp(1.7rem, 4vw, 2.4rem); font-weight: 700; color: var(--ink);
  transition: .15s;
}
.letter:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow); }
.letter.off { border-color: transparent; color: var(--ink2); pointer-events: none; }
.letter.oksel { border-color: var(--good); color: var(--good); background: var(--good-bg); }
.sb { display: inline-block; min-width: 1.05em; height: 1.2em; border-bottom: 3px solid var(--accent); margin: 0 3px; }
.okus { color: var(--good); font-weight: 800; }
.note { text-align: center; color: var(--ink2); font-size: .98rem; margin-top: 14px; line-height: 1.5; }
.qopts { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.qbtn {
  min-width: 150px; padding: 14px 24px; border-radius: 12px;
  background: var(--bg2); border: 2px solid var(--line); font-size: 1.05rem; font-weight: 600;
  transition: .15s;
}
.qbtn:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow); }
.qbtn:active { transform: scale(.98); }

/* фидбек */
.fb { display: flex; gap: 16px; align-items: flex-start; border-radius: var(--radius); padding: 20px 22px; margin-bottom: 16px; animation: fade .2s ease; }
.fb-ok { background: var(--good-bg); border: 1px solid color-mix(in srgb, var(--good) 35%, transparent); }
.fb-bad { background: var(--bad-bg); border: 1px solid color-mix(in srgb, var(--bad) 35%, transparent); }
.fb-badge {
  width: 44px; height: 44px; min-width: 44px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 1.4rem; font-weight: 800; color: #fff;
}
.fb-ok .fb-badge { background: var(--good); }
.fb-bad .fb-badge { background: var(--bad); }
.fb-body { flex: 1; }
.fb-verdict { font-size: 1.12rem; font-weight: 800; margin-bottom: 8px; }

/* сайдбар */
.qside details {
  background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; margin-bottom: 12px;
}
.qside summary { font-weight: 700; font-size: .92rem; cursor: pointer; color: var(--ink2); }
.rulebox { padding-top: 10px; font-size: .9rem; color: var(--ink2); }
.rulebox p { margin-bottom: 8px; }
.rulebox ul { padding-left: 18px; }
.rulebox li { margin-bottom: 6px; }
.empty {
  background: var(--bg2); border: 1px dashed var(--line); border-radius: var(--radius);
  padding: 34px; text-align: center; color: var(--ink2);
}
.empty h3 { color: var(--ink); margin-bottom: 8px; }
.empty code { word-break: break-all; }

/* ---------------- авторизация ---------------- */
.authcard { max-width: 420px; margin: 30px auto; background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 28px; }
.authcard h2 { margin-bottom: 4px; }
.tabs { margin-top: 16px; }
.tb {
  padding: 8px 18px; border-radius: 10px 10px 0 0; border: 1px solid var(--line); border-bottom: none;
  color: var(--ink2); font-weight: 600; background: transparent;
}
.tb.on { background: var(--bg2); color: var(--accent); }
.authform { display: flex; flex-direction: column; gap: 14px; border: 1px solid var(--line); border-radius: 0 12px 12px 12px; background: var(--bg2); padding: 20px; margin-top: -1px; }
.authform label { display: flex; flex-direction: column; gap: 6px; font-size: .9rem; color: var(--ink2); }
.authform input {
  padding: 11px 13px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); color: var(--ink); font-size: 1rem; outline: none; transition: .15s;
}
.authform input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent); }
.formerr {
  background: var(--bad-bg); border: 1px solid color-mix(in srgb, var(--bad) 40%, transparent);
  color: var(--ink); padding: 12px 16px; border-radius: 11px; margin-top: 14px; font-size: .94rem;
}

/* ---------------- статистика / словарь / правила / тд ---------------- */
.ttlbar { display: flex; gap: 26px; flex-wrap: wrap; background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; margin-bottom: 16px; box-shadow: var(--shadow); }
.ttlbar b { color: var(--accent); }
.stable { width: 100%; border-collapse: collapse; background: var(--bg2); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.stable th, .stable td { text-align: left; padding: 13px 16px; border-bottom: 1px solid var(--line); font-size: .95rem; }
.stable th { color: var(--ink2); font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; }
.stable tr:last-child td { border-bottom: none; }
.wordlist, .rulewrap, .fmtwrap { display: flex; flex-direction: column; gap: 10px; }
.witem { background: var(--bg2); border: 1px solid var(--line); border-radius: 11px; padding: 11px 16px; font-size: .98rem; }
.rblock, .fmt, .wlist { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 18px; }
.rblock summary, .fmt summary, .wlist summary { font-weight: 700; cursor: pointer; }
.rblock .rulebox { font-size: .95rem; color: var(--ink2); }
.fmt pre {
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px; margin: 10px 0; overflow-x: auto; font-size: .86rem; line-height: 1.5;
  white-space: pre;
}
.fmt p { color: var(--ink2); font-size: .9rem; }

.foot { text-align: center; color: var(--ink2); font-size: .82rem; padding: 26px 20px 40px; border-top: 1px solid var(--line); margin-top: 30px; }