:root {
  --bg: linear-gradient(135deg, #e9e6ff 0%, #e3edff 45%, #f3e8ff 100%);
  --panel: rgb(255 255 255 / 62%);
  --panel-2: rgb(255 255 255 / 55%);
  --line: rgb(255 255 255 / 80%);
  --ink: #171a21;
  --ink-2: #4b5261;
  --ink-3: #7c8494;
  --brand: #f0453f;
  --brand-ink: #ffffff;
  --ok: #12804a;
  --ok-soft: #e2f6ea;
  --warn: #9a5b00;
  --warn-soft: #fff4dc;
  --bad: #c62828;
  --bad-soft: #fde8e6;
  --bar: #7c5cff;
  --shadow: 0 8px 30px rgb(88 80 160 / 12%);
  --nav-h: 64px;
}
:root[data-theme="dark"] {
  --bg: linear-gradient(135deg, #14122b 0%, #101a30 50%, #1b1230 100%);
  --panel: rgb(255 255 255 / 7%);
  --panel-2: rgb(255 255 255 / 10%);
  --line: rgb(255 255 255 / 14%);
  --ink: #eef0f4;
  --ink-2: #b6bcc8;
  --ink-3: #8a91a0;
  --brand: #ff3b30;
  --warn: #f2b84b;
  --warn-soft: #3a2e12;
  --ok: #4ccb8a;
  --ok-soft: #12301f;
  --bad: #ff6b60;
  --bad-soft: #3a1614;
  --shadow: none;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg) fixed;
  min-height: 100dvh;
  color: var(--ink);
  font: 16px/1.45 Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
}
[hidden] { display: none !important; }
h1, h2 { margin: 0; letter-spacing: -0.01em; }
h1 { font-size: 22px; }
h2 { font-size: 17px; }
p { margin: 0; }
.muted { color: var(--ink-3); font-size: 14px; }
.error { color: var(--bad); font-size: 13px; min-height: 1em; }
.error:empty { display: none; }
.notice { background: var(--warn-soft); color: var(--warn); border-radius: 14px; padding: 10px 12px; font-size: 14px; }
.num { font-variant-numeric: tabular-nums; }
.grow { flex: 1; }

.card { background: var(--panel); backdrop-filter: blur(18px) saturate(1.4); -webkit-backdrop-filter: blur(18px) saturate(1.4); border: 1px solid var(--line); border-radius: 24px; padding: 18px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 12px; }
label { display: flex; flex-direction: column; gap: 6px; font-size: 12px; font-weight: 600; color: var(--ink-2); min-width: 0; }
input, select, textarea { font: inherit; font-size: 16px; color: var(--ink); background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 11px 12px; width: 100%; min-width: 0; }
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible { outline: 2px solid var(--brand); outline-offset: 1px; }
textarea { resize: vertical; }
.btn { font: inherit; font-weight: 600; border: 1px solid var(--line); background: var(--panel); color: var(--ink); border-radius: 14px; padding: 11px 16px; cursor: pointer; text-align: center; min-height: 44px; }
.btn:hover { background: var(--panel-2); }
.btn.primary { background: linear-gradient(180deg, color-mix(in srgb, var(--brand) 82%, white), var(--brand)); border-color: color-mix(in srgb, var(--brand) 70%, white); color: var(--brand-ink); box-shadow: 0 6px 18px color-mix(in srgb, var(--brand) 35%, transparent); }
.btn.primary:hover { filter: brightness(0.94); }
.btn.danger { color: var(--bad); }
.btn.wide { width: 100%; padding: 13px; }
.btn.small { min-height: 32px; padding: 4px 10px; font-size: 13px; border-radius: 10px; }
.btn:disabled { opacity: 0.6; cursor: progress; }
.icon-btn { display: inline-grid; place-items: center; border: 0; background: transparent; color: var(--ink-2); font-size: 20px; width: 44px; height: 44px; border-radius: 12px; cursor: pointer; }
.icon-btn:hover { background: var(--panel-2); }
.row { display: flex; gap: 10px; flex-wrap: wrap; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.auth { min-height: 100dvh; display: grid; place-items: center; padding: 16px; }
.auth-card { width: min(380px, 100%); align-items: stretch; text-align: center; }
.auth-card img { align-self: center; }
.auth-card label { text-align: left; }

.top { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; justify-content: space-between; padding: 8px 16px; padding-top: calc(8px + env(safe-area-inset-top)); background: var(--panel); backdrop-filter: blur(18px) saturate(1.4); -webkit-backdrop-filter: blur(18px) saturate(1.4); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.top-actions { display: flex; }
.view { max-width: 640px; margin: 0 auto; padding: 16px; padding-bottom: calc(var(--nav-h) + 24px + env(safe-area-inset-bottom)); display: flex; flex-direction: column; gap: 14px; }

.nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 6; display: flex; justify-content: center; gap: 4px; padding: 6px 10px calc(6px + env(safe-area-inset-bottom)); background: var(--panel); backdrop-filter: blur(18px) saturate(1.4); -webkit-backdrop-filter: blur(18px) saturate(1.4); border-top: 1px solid var(--line); }
.tab { position: relative; flex: 1; max-width: 150px; font: inherit; font-size: 12px; font-weight: 600; border: 0; background: transparent; color: var(--ink-3); padding: 6px 4px; border-radius: 14px; cursor: pointer; display: flex; flex-direction: column; align-items: center; gap: 2px; min-height: 52px; }
.tab i { font-style: normal; font-size: 20px; line-height: 1; }
.tab[aria-current="page"] { background: var(--panel-2); color: var(--brand); }
.badge { position: absolute; top: 2px; right: calc(50% - 26px); background: var(--brand); color: var(--brand-ink); border-radius: 999px; padding: 0 6px; font-size: 11px; }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.stat { background: var(--panel); backdrop-filter: blur(18px) saturate(1.4); -webkit-backdrop-filter: blur(18px) saturate(1.4); border: 1px solid var(--line); border-radius: 22px; padding: 12px; box-shadow: var(--shadow); min-width: 0; }
.stat span { display: block; font-size: 11px; color: var(--ink-3); font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.stat b { font-size: 26px; letter-spacing: -0.02em; margin-right: 4px; }
.stat small { color: var(--ink-3); font-size: 12px; }
.stat.hot b { color: var(--brand); }

.progress { height: 8px; border-radius: 4px; background: var(--panel-2); overflow: hidden; }
.progress div { height: 100%; width: 0; border-radius: 4px; background: var(--bar); transition: width 0.25s; }
.phrase { display: grid; grid-template-columns: 1fr auto; gap: 2px 10px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--line); }
.phrase:last-child { border-bottom: 0; }
.phrase b { font-size: 17px; }
.phrase span { grid-column: 1; color: var(--ink-2); font-size: 14px; }
.phrase small { grid-column: 1; color: var(--ink-3); font-size: 13px; }
.phrase .btn { grid-column: 2; grid-row: 1 / span 2; }
.options { display: flex; flex-direction: column; gap: 8px; }
.option { text-align: left; font-weight: 500; }
.option.right { background: var(--ok-soft); border-color: var(--ok); color: var(--ok); }
.option.wrong { background: var(--bad-soft); border-color: var(--bad); color: var(--bad); }
.big { font-size: 40px; font-weight: 700; letter-spacing: -0.02em; text-align: center; color: var(--brand); }

.chips { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 2px; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip { flex: none; font: inherit; font-size: 13px; font-weight: 600; border: 1px solid var(--line); background: var(--panel); color: var(--ink-2); border-radius: 999px; padding: 8px 14px; cursor: pointer; min-height: 38px; }
.chip[aria-pressed="true"] { background: var(--brand); border-color: var(--brand); color: var(--brand-ink); }
.chat { gap: 10px; }
.messages { display: flex; flex-direction: column; gap: 10px; min-height: 40dvh; }
.msg { max-width: 88%; display: flex; flex-direction: column; gap: 6px; padding: 10px 14px; border-radius: 20px; background: var(--panel); border: 1px solid var(--line); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.msg.user { align-self: flex-end; background: color-mix(in srgb, var(--brand) 14%, var(--panel)); border-bottom-right-radius: 6px; }
.msg.assistant { align-self: flex-start; border-bottom-left-radius: 6px; }
.msg .ru { font-size: 17px; }
.msg .uz { color: var(--ink-2); font-size: 14px; }
.msg .tools { display: flex; gap: 6px; flex-wrap: wrap; }
.fix { align-self: flex-end; max-width: 88%; background: var(--warn-soft); color: var(--warn); border-radius: 14px; padding: 8px 12px; font-size: 14px; display: flex; flex-direction: column; gap: 2px; }
.fix b { color: var(--ink); font-size: 16px; font-weight: 600; }
.fix.good { background: var(--ok-soft); color: var(--ok); }
.typing { color: var(--ink-3); font-size: 14px; padding: 0 6px; }
.composer { position: sticky; bottom: calc(var(--nav-h) + 10px + env(safe-area-inset-bottom)); display: flex; gap: 8px; align-items: flex-end; background: var(--panel); backdrop-filter: blur(18px) saturate(1.4); -webkit-backdrop-filter: blur(18px) saturate(1.4); border: 1px solid var(--line); border-radius: 22px; padding: 8px; box-shadow: var(--shadow); }
.composer textarea { border: 0; background: transparent; resize: none; max-height: 120px; padding: 10px 6px; }
.composer textarea:focus-visible { outline: 0; }
.composer .btn { flex: none; width: 46px; padding: 0; border-radius: 50%; }
.btn.mic { color: var(--brand); }
.btn.mic[aria-pressed="true"] { background: var(--brand); border-color: var(--brand); color: var(--brand-ink); animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 8px color-mix(in srgb, var(--brand) 22%, transparent); } }
@media (prefers-reduced-motion: reduce) { .btn.mic[aria-pressed="true"] { animation: none; } .progress div { transition: none; } }

.flash { font: inherit; color: inherit; border: 1px solid var(--line); background: var(--panel-2); border-radius: 22px; min-height: 220px; padding: 20px; cursor: pointer; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; text-align: center; }
.flash b { font-size: 28px; letter-spacing: -0.01em; }
.flash > span:not(.tag) { font-size: 19px; color: var(--ink-2); }
.flash small { font-size: 14px; color: var(--ink-3); white-space: pre-line; }
.flash em { font-style: normal; font-size: 13px; color: var(--ink-3); }
.tag { font-size: 12px; color: var(--ink-3); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
.grades { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.grades .btn { padding: 11px 4px; font-size: 14px; }
.rows { display: flex; flex-direction: column; }
.word { display: grid; grid-template-columns: 1fr auto; gap: 0 10px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--line); }
.word:last-child { border-bottom: 0; }
.word b { font-weight: 600; }
.word span { grid-column: 1; color: var(--ink-2); font-size: 14px; }
.word .icon-btn { grid-column: 2; grid-row: 1 / span 2; font-size: 16px; color: var(--ink-3); }
.empty { text-align: center; color: var(--ink-3); padding: 20px 12px; font-size: 14px; }

.score { display: flex; align-items: baseline; gap: 10px; }
.score b { font-size: 34px; color: var(--brand); }
.corrected { background: var(--ok-soft); color: var(--ink); border-radius: 14px; padding: 12px; font-size: 17px; white-space: pre-wrap; }
.err { padding: 10px 0; border-bottom: 1px solid var(--line); display: flex; flex-direction: column; gap: 2px; }
.err:last-child { border-bottom: 0; }
.err s { color: var(--bad); }
.err b { color: var(--ok); }
.err span { color: var(--ink-2); font-size: 14px; }

@media (max-width: 420px) {
  .view { padding: 12px; padding-bottom: calc(var(--nav-h) + 24px + env(safe-area-inset-bottom)); }
  .grid { grid-template-columns: 1fr; }
  .stat b { font-size: 22px; }
}