/* Chess Coach: mobile-first styles on top of Bootstrap 5.3 */

:root {
  --cc-accent: #2e6b4a;
  --cc-accent-soft: #e3f0e8;
  --cc-good: #1f8a4c;
  --cc-bad: #c0392b;
  --cc-warn: #c98a0b;
  --cc-surface: #ffffff;
  --cc-bg: #f3f5f2;
  --cc-border: #dfe4dd;
  --cc-muted: #66706a;
  --cc-tabbar-h: 62px;
  --bs-link-color: var(--cc-accent);
  --bs-link-color-rgb: 46, 107, 74;
}

[data-bs-theme="dark"] {
  --cc-accent: #6fc196;
  --cc-accent-soft: #1d3327;
  --cc-good: #4cc47e;
  --cc-bad: #ef6b5b;
  --cc-warn: #e9b03d;
  --cc-surface: #1b1f1d;
  --cc-bg: #121514;
  --cc-border: #2c322f;
  --cc-muted: #9aa49e;
  --bs-link-color-rgb: 111, 193, 150;
}

html, body { background: var(--cc-bg); }
body {
  min-height: 100vh;
  padding-bottom: env(safe-area-inset-bottom);
  -webkit-tap-highlight-color: transparent;
}
body.with-tabs { padding-bottom: calc(var(--cc-tabbar-h) + env(safe-area-inset-bottom) + 12px); }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: .5rem;
  padding: .5rem 1rem; padding-top: calc(.5rem + env(safe-area-inset-top));
  background: var(--cc-surface); border-bottom: 1px solid var(--cc-border);
}
.brand { display: flex; align-items: center; gap: .5rem; font-weight: 700; color: inherit; text-decoration: none; font-size: 1.1rem; }
.rating-chip {
  margin-left: auto; text-decoration: none; color: inherit;
  background: var(--cc-accent-soft); border-radius: 999px; padding: .2rem .75rem; font-size: .9rem;
}
.rating-chip .label { color: var(--cc-muted); }
.icon-btn { color: var(--cc-muted); display: inline-flex; padding: .3rem; border-radius: 8px; }
.icon-btn:hover { color: var(--cc-accent); }

/* ---------- page ---------- */
.page { max-width: 640px; margin: 0 auto; padding: 1rem; }
.page.wide { max-width: 980px; }
h1.page-title { font-size: 1.5rem; font-weight: 700; margin: .25rem 0 1rem; }
.muted { color: var(--cc-muted); }
.small-caps { font-size: .75rem; letter-spacing: .06em; text-transform: uppercase; color: var(--cc-muted); font-weight: 600; }

.card-cc {
  background: var(--cc-surface); border: 1px solid var(--cc-border); border-radius: 14px;
  padding: 1rem; margin-bottom: 1rem;
}
.card-cc h2 { font-size: 1.1rem; font-weight: 700; margin-bottom: .5rem; }
.card-cc h3 { font-size: 1rem; font-weight: 600; margin-bottom: .25rem; }

.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: .5rem; }
.stat { background: var(--cc-surface); border: 1px solid var(--cc-border); border-radius: 12px; padding: .6rem; text-align: center; }
.stat .value { font-size: 1.4rem; font-weight: 700; line-height: 1.2; }
.stat .label { font-size: .75rem; color: var(--cc-muted); }

.btn-cc { background: var(--cc-accent); color: #fff; border: none; }
.btn-cc:hover, .btn-cc:focus { background: var(--cc-accent); color: #fff; filter: brightness(1.1); }
[data-bs-theme="dark"] .btn-cc { color: #0d1a13; }

/* list rows that are links */
.row-link {
  display: flex; align-items: center; gap: .75rem; padding: .75rem; margin: 0 -.25rem;
  border-radius: 10px; text-decoration: none; color: inherit;
}
.row-link:hover { background: var(--cc-accent-soft); }
.row-link .grow { flex: 1; min-width: 0; }
.row-link .title { font-weight: 600; }
.row-link .sub { font-size: .85rem; color: var(--cc-muted); }
.chev { color: var(--cc-muted); }

.check {
  width: 26px; height: 26px; border-radius: 50%; flex: none;
  border: 2px solid var(--cc-border); display: grid; place-items: center; font-size: .8rem;
}
.check.done { background: var(--cc-good); border-color: var(--cc-good); color: #fff; }

.badge-level { font-size: .7rem; border-radius: 6px; padding: .1rem .4rem; background: var(--cc-accent-soft); color: var(--cc-accent); font-weight: 600; }

/* skill bars */
.skill { margin-bottom: .75rem; }
.skill .top { display: flex; justify-content: space-between; font-size: .9rem; }
.bar { height: 8px; background: var(--cc-border); border-radius: 4px; overflow: hidden; margin-top: .25rem; }
.bar > span { display: block; height: 100%; border-radius: 4px; background: var(--cc-accent); }
.bar.weak > span { background: var(--cc-bad); }
.bar.mid > span { background: var(--cc-warn); }

.focus-item { border-left: 4px solid var(--cc-bad); padding: .5rem .75rem; margin-bottom: .75rem; background: var(--cc-bg); border-radius: 0 10px 10px 0; }
.focus-item .reason { font-size: .9rem; color: var(--cc-muted); }

/* ---------- board ---------- */
.board-wrap { width: 100%; max-width: 560px; margin: 0 auto; touch-action: none; }
.board-wrap .cm-chessboard { user-select: none; }
.board-area { position: relative; }
.board-status {
  display: flex; align-items: center; gap: .5rem; min-height: 2.5rem; margin: .5rem 0;
  font-weight: 600;
}
.board-status .dot { width: 14px; height: 14px; border-radius: 50%; border: 2px solid var(--cc-muted); flex: none; }
.board-status .dot.w { background: #fff; }
.board-status .dot.b { background: #222; }
.feedback { border-radius: 12px; padding: .75rem 1rem; margin: .5rem 0; }
.feedback.good { background: color-mix(in srgb, var(--cc-good) 15%, transparent); }
.feedback.bad { background: color-mix(in srgb, var(--cc-bad) 15%, transparent); }
.feedback.info { background: var(--cc-accent-soft); }
.feedback:empty { display: none; }

.controls { display: flex; flex-wrap: wrap; gap: .5rem; margin: .5rem 0; }
.controls .btn { flex: 1 1 auto; min-height: 44px; }

.lesson-text { font-size: 1.02rem; line-height: 1.55; }
.lesson-text p:last-child { margin-bottom: 0; }
.progress-dots { display: flex; gap: 4px; margin-bottom: .75rem; }
.progress-dots span { flex: 1; height: 5px; border-radius: 3px; background: var(--cc-border); }
.progress-dots span.done { background: var(--cc-accent); }
.progress-dots span.current { background: var(--cc-warn); }

.choice-list { display: grid; gap: .5rem; }
.choice-list .btn { text-align: left; white-space: normal; min-height: 48px; }
.choice-list .btn.right { border-color: var(--cc-good); background: color-mix(in srgb, var(--cc-good) 15%, transparent); }
.choice-list .btn.wrong { border-color: var(--cc-bad); background: color-mix(in srgb, var(--cc-bad) 12%, transparent); }

.move-list { display: flex; flex-wrap: wrap; gap: .15rem .35rem; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .92rem; }
.move-list .num { color: var(--cc-muted); }
.move-list .mv { cursor: pointer; padding: 0 .25rem; border-radius: 4px; }
.move-list .mv.current { background: var(--cc-accent); color: #fff; }
.move-list .mv.inaccuracy::after { content: "?!"; color: var(--cc-warn); font-weight: 700; }
.move-list .mv.mistake::after { content: "?"; color: #e67e22; font-weight: 700; }
.move-list .mv.blunder::after { content: "??"; color: var(--cc-bad); font-weight: 700; }

.eval-bar { height: 10px; border-radius: 5px; background: #333; overflow: hidden; margin: .25rem 0 .5rem; }
.eval-bar > span { display: block; height: 100%; background: #f1f1f1; transition: width .3s; }

/* rating change pop */
.delta { font-weight: 700; margin-left: .35rem; }
.delta.up { color: var(--cc-good); }
.delta.down { color: var(--cc-bad); }

/* ---------- charts ---------- */
.chart { width: 100%; height: auto; display: block; }
.chart .grid { stroke: var(--cc-border); stroke-width: 1; }
.chart .line { fill: none; stroke: var(--cc-accent); stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.chart .area { fill: var(--cc-accent); opacity: .12; }
.chart text { fill: var(--cc-muted); font-size: 11px; }
.spark { width: 70px; height: 22px; }
.spark polyline { fill: none; stroke: var(--cc-accent); stroke-width: 2; }

.heatmap { display: grid; grid-template-rows: repeat(7, 1fr); grid-auto-flow: column; gap: 3px; }
.heatmap span { width: 100%; aspect-ratio: 1; border-radius: 3px; background: var(--cc-border); }
.heatmap span.l1 { background: color-mix(in srgb, var(--cc-accent) 35%, var(--cc-border)); }
.heatmap span.l2 { background: color-mix(in srgb, var(--cc-accent) 65%, var(--cc-border)); }
.heatmap span.l3 { background: var(--cc-accent); }
.heatmap span.future { visibility: hidden; }

/* ---------- tab bar ---------- */
.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 30;
  display: grid; grid-template-columns: repeat(5, 1fr);
  height: calc(var(--cc-tabbar-h) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  background: var(--cc-surface); border-top: 1px solid var(--cc-border);
}
.tabbar a {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  text-decoration: none; color: var(--cc-muted); font-size: .72rem; font-weight: 600;
}
.tabbar a svg { width: 24px; height: 24px; }
.tabbar a.active { color: var(--cc-accent); }

/* Identity pages (login/register) */
.page form .form-floating { margin-bottom: .75rem; }
.page .btn-primary { --bs-btn-bg: var(--cc-accent); --bs-btn-border-color: var(--cc-accent); --bs-btn-hover-bg: var(--cc-accent); --bs-btn-hover-border-color: var(--cc-accent); --bs-btn-active-bg: var(--cc-accent); }
/* Google's own button colors (light and dark) */
.btn-google {
  display: flex; align-items: center; justify-content: center; gap: .6rem; font-weight: 500;
  --bs-btn-bg: #fff; --bs-btn-color: #1f1f1f; --bs-btn-border-color: #747775;
  --bs-btn-hover-bg: #f2f2f2; --bs-btn-hover-color: #1f1f1f; --bs-btn-hover-border-color: #747775;
  --bs-btn-active-bg: #e8e8e8; --bs-btn-active-color: #1f1f1f; --bs-btn-active-border-color: #747775;
}
[data-bs-theme="dark"] .btn-google {
  --bs-btn-bg: #131314; --bs-btn-color: #e3e3e3; --bs-btn-border-color: #8e918f;
  --bs-btn-hover-bg: #1f1f20; --bs-btn-hover-color: #e3e3e3; --bs-btn-hover-border-color: #8e918f;
  --bs-btn-active-bg: #2a2a2b; --bs-btn-active-color: #e3e3e3; --bs-btn-active-border-color: #8e918f;
}
.or-divider { display: flex; align-items: center; gap: .75rem; margin: 1rem 0; color: var(--cc-muted); font-size: .85rem; }
.or-divider::before, .or-divider::after { content: ""; flex: 1; border-top: 1px solid var(--cc-border); }

@media (min-width: 900px) {
  .split { display: grid; grid-template-columns: minmax(0, 560px) minmax(0, 1fr); gap: 1.5rem; align-items: start; }
}