/* Мобильный интерфейс. Тёмная тема по умолчанию, светлая — если так в системе. */

:root {
  --bg: #12131a;
  --bg2: #1a1c26;
  --bg3: #23262f;
  --fg: #eceef4;
  --muted: #9aa0b0;
  --line: #2e3140;
  --accent: #6c8cff;
  --accent-fg: #ffffff;
  --g1: #e0556a;
  --g2: #e09b3d;
  --g3: #43b581;
  --g4: #4b9dd8;
  --ok: #43b581;
  --warn: #e0a53d;
  --err: #e0556a;
  --radius: 16px;
  --tabh: 62px;
}

html[data-theme="light"] {
  --bg: #f6f7fb;
  --bg2: #ffffff;
  --bg3: #eceef4;
  --fg: #171a21;
  --muted: #666d7d;
  --line: #dcdfe8;
  --accent: #3f5fd8;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--fg);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  -webkit-text-size-adjust: 100%;
  overscroll-behavior-y: none;
}

body { padding-bottom: env(safe-area-inset-bottom); }

.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.center { text-align: center; }
code { background: var(--bg3); padding: 1px 5px; border-radius: 6px; font-size: 13px; }

/* ---------- каркас ---------- */
.screen { min-height: 100vh; padding-bottom: calc(var(--tabh) + 16px); }
.top {
  display: flex; align-items: center; justify-content: space-between;
  padding: calc(env(safe-area-inset-top) + 14px) 16px 10px;
  position: sticky; top: 0; background: var(--bg); z-index: 5;
}
.top h1 { font-size: 22px; margin: 0; letter-spacing: -0.02em; }
.pad { padding: 4px 16px 24px; }

.tabs {
  position: fixed; left: 0; right: 0; bottom: 0; height: calc(var(--tabh) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  display: flex; background: var(--bg2); border-top: 1px solid var(--line); z-index: 20;
}
.tab {
  flex: 1; background: none; border: 0; color: var(--muted);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  font-size: 11px; padding: 0; cursor: pointer;
}
.tab b { font-size: 20px; font-weight: normal; line-height: 1; filter: grayscale(0.6); }
.tab.active { color: var(--fg); }
.tab.active b { filter: none; }

/* ---------- кнопки ---------- */
.btn {
  appearance: none; border: 1px solid var(--line); background: var(--bg3); color: var(--fg);
  padding: 12px 16px; border-radius: 12px; font-size: 15px; font-weight: 500;
  cursor: pointer; min-height: 48px;
}
.btn:active { transform: scale(0.985); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
.btn.big { width: 100%; font-size: 17px; min-height: 56px; }
.btn.huge { width: 100%; font-size: 19px; min-height: 62px; margin: 18px 0 6px; font-weight: 600; }
.btn.link { background: none; border: 0; color: var(--accent); padding: 12px 0; text-align: left; min-height: 0; }
.btn.danger { background: var(--err); border-color: var(--err); color: #fff; }
.btn.file { position: relative; overflow: hidden; display: inline-flex; align-items: center; }
.btn.file input { position: absolute; inset: 0; opacity: 0; }
.icon-btn { background: none; border: 0; color: var(--muted); font-size: 22px; padding: 8px 12px; cursor: pointer; }
.row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.row .btn { flex: 1 1 auto; }

/* ---------- главный ---------- */
.streak { font-size: 15px; background: var(--bg3); padding: 6px 12px; border-radius: 999px; }
.goal-card { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.goal-row { display: flex; justify-content: space-between; font-size: 14px; color: var(--muted); }
.goal-row b { color: var(--fg); }
.goal-bar { height: 8px; background: var(--bg3); border-radius: 999px; margin-top: 10px; overflow: hidden; }
.goal-bar > div { height: 100%; width: 0; background: var(--accent); border-radius: 999px; transition: width .3s; }

.counts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 12px; }
.count { background: var(--bg2); border: 1px solid var(--line); border-radius: 14px; padding: 12px 6px; text-align: center; }
.count b { display: block; font-size: 22px; }
.count span { font-size: 11px; color: var(--muted); }
.count.new b { color: var(--accent); }
.count.learn b { color: var(--warn); }
.count.due b { color: var(--g1); }
.count.mature b { color: var(--ok); }

.modes { margin-top: 20px; }
.mode-label { font-size: 13px; color: var(--muted); }
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.chips.small .chip { font-size: 12px; padding: 6px 10px; min-height: 0; }
.chip {
  background: var(--bg2); border: 1px solid var(--line); color: var(--fg);
  padding: 9px 14px; border-radius: 999px; font-size: 14px; cursor: pointer;
}
.chip.active { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }

.empty-note { color: var(--muted); font-size: 14px; text-align: center; margin: 6px 0 0; }
.quick { display: grid; gap: 10px; margin-top: 22px; }
.tile {
  display: flex; align-items: center; gap: 12px; text-align: left;
  background: var(--bg2); border: 1px solid var(--line); color: var(--fg);
  padding: 14px; border-radius: var(--radius); font-size: 15px; cursor: pointer;
}
.tile b { font-size: 22px; font-weight: normal; }

/* ---------- тренировка ---------- */
.review { display: flex; flex-direction: column; height: 100vh; height: 100dvh; padding-bottom: 0; }
.review-top {
  display: flex; align-items: center; gap: 10px;
  padding: calc(env(safe-area-inset-top) + 8px) 8px 8px;
}
.review-progress { flex: 1; height: 6px; background: var(--bg3); border-radius: 999px; overflow: hidden; }
.review-progress > div { height: 100%; width: 0; background: var(--accent); transition: width .25s; }
.review-counter { font-size: 13px; color: var(--muted); min-width: 52px; text-align: right; padding-right: 8px; }

.card-area { flex: 1; overflow-y: auto; padding: 8px 16px; display: flex; }
.card {
  background: var(--bg2); border: 1px solid var(--line); border-radius: 20px;
  padding: 22px 18px 26px; width: 100%; align-self: flex-start;
  display: flex; flex-direction: column; align-items: center; text-align: center;
}
.card-mode { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 14px; }
.card-question { font-size: 30px; font-weight: 600; line-height: 1.2; letter-spacing: -0.02em; word-break: break-word; }
.card-question .gap { color: var(--accent); border-bottom: 2px dashed var(--accent); padding: 0 18px; }
.card-ipa { color: var(--muted); font-size: 15px; margin-top: 6px; }
.speak-btn {
  margin-top: 14px; width: 60px; height: 60px; border-radius: 50%;
  background: var(--bg3); border: 1px solid var(--line); color: var(--fg); font-size: 26px; cursor: pointer;
}
.card-hint { color: var(--muted); font-size: 14px; margin-top: 10px; }

.answer-box { width: 100%; margin-top: 20px; }
input[type="text"], input[type="search"], input[type="number"], textarea, select {
  width: 100%; background: var(--bg3); color: var(--fg);
  border: 1px solid var(--line); border-radius: 12px; padding: 13px 14px; font-size: 17px; font-family: inherit;
}
#answer-input { text-align: center; }
.verdict { margin-top: 12px; font-size: 15px; min-height: 22px; }
.verdict.ok { color: var(--ok); }
.verdict.typo { color: var(--warn); }
.verdict.err { color: var(--err); }
.verdict s { color: var(--muted); }

.card-answer { width: 100%; margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); }
.answer-main { font-size: 22px; font-weight: 600; }
.answer-pos { color: var(--muted); font-size: 13px; margin-top: 4px; }
.examples { list-style: none; padding: 0; margin: 16px 0 0; text-align: left; }
.examples li { background: var(--bg3); border-radius: 12px; padding: 10px 12px; margin-bottom: 8px; font-size: 15px; }
.examples .en { display: block; }
.examples .en em { color: var(--accent); font-style: normal; font-weight: 600; }
.examples .ru { display: block; color: var(--muted); font-size: 14px; margin-top: 3px; }
.card-note { margin-top: 12px; font-size: 14px; color: var(--warn); text-align: left; }
.card-tags { margin-top: 12px; display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; }
.card-tags span { font-size: 11px; color: var(--muted); background: var(--bg3); padding: 3px 8px; border-radius: 999px; }

.review-bottom { padding: 12px 16px calc(16px + env(safe-area-inset-bottom)); }
.grades { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.grade {
  border: 0; border-radius: 14px; padding: 12px 4px; color: #fff; cursor: pointer;
  display: flex; flex-direction: column; gap: 3px; min-height: 60px; font-size: 13px; font-weight: 600;
}
.grade em { font-style: normal; font-size: 11px; opacity: .85; font-weight: 400; }
.g1 { background: var(--g1); } .g2 { background: var(--g2); } .g3 { background: var(--g3); } .g4 { background: var(--g4); }

/* ---------- списки, блоки ---------- */
.block { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; margin-top: 14px; }
.block h2 { font-size: 16px; margin: 0 0 8px; }
.block.danger { border-color: var(--err); }
.field { display: block; font-size: 13px; color: var(--muted); margin-top: 12px; }
.field input, .field select { margin-top: 6px; }
.check { display: flex; align-items: center; gap: 10px; margin-top: 14px; font-size: 15px; color: var(--fg); }
.check input { width: 22px; height: 22px; }
.result { font-size: 14px; margin-top: 10px; min-height: 20px; }
.result.ok { color: var(--ok); }
.result.err { color: var(--err); }
.preview {
  background: var(--bg3); border-radius: 12px; padding: 12px; font-size: 12px;
  white-space: pre-wrap; word-break: break-word; max-height: 260px; overflow: auto; margin-top: 12px;
}
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 14px; }

.list { margin-top: 12px; }
.item {
  background: var(--bg2); border: 1px solid var(--line); border-radius: 14px;
  padding: 12px 14px; margin-bottom: 8px;
}
.item-head { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.item-front { font-weight: 600; }
.item-back { color: var(--muted); font-size: 14px; margin-top: 2px; }
.item-meta { font-size: 11px; color: var(--muted); white-space: nowrap; }
.badge { font-size: 10px; padding: 2px 7px; border-radius: 999px; background: var(--bg3); color: var(--muted); }
.badge.leech { background: var(--err); color: #fff; }
.badge.mature { background: var(--ok); color: #fff; }
.badge.young { background: var(--g4); color: #fff; }
.badge.new { background: var(--accent); color: #fff; }
.badge.learning, .badge.relearn { background: var(--warn); color: #22242c; }
.item-actions { display: flex; gap: 8px; margin-top: 10px; }
.item-actions button { flex: 1; font-size: 13px; padding: 8px; min-height: 40px; }

.stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.stat { background: var(--bg2); border: 1px solid var(--line); border-radius: 14px; padding: 12px; }
.stat b { display: block; font-size: 24px; }
.stat span { font-size: 12px; color: var(--muted); }
.bar-row { display: flex; align-items: center; gap: 10px; margin-top: 10px; font-size: 14px; }
.bar-row .name { flex: 0 0 38%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar-row .bar { flex: 1; height: 10px; background: var(--bg3); border-radius: 999px; overflow: hidden; }
.bar-row .bar > i { display: block; height: 100%; background: var(--accent); }
.bar-row .val { flex: 0 0 44px; text-align: right; color: var(--muted); font-size: 13px; }
.bar-row.bad .bar > i { background: var(--err); }
.bar-row.mid .bar > i { background: var(--warn); }
.bar-row.good .bar > i { background: var(--ok); }

.toast {
  position: fixed; left: 50%; transform: translateX(-50%) translateY(20px);
  bottom: calc(var(--tabh) + 24px); background: var(--bg3); color: var(--fg);
  border: 1px solid var(--line); padding: 12px 18px; border-radius: 999px;
  font-size: 14px; opacity: 0; pointer-events: none; transition: all .25s; z-index: 50; max-width: 88vw; text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (min-width: 620px) {
  .screen { max-width: 640px; margin: 0 auto; }
  .card-question { font-size: 34px; }
}