:root {
  --bg:         #101827;
  --panel:      #172033;
  --panel2:     #111b2d;
  --text:       #f5f7fb;
  --muted:      #9fb0cc;
  --accent:     #55d6be;
  --accent-dk:  #08121f;
  --danger:     #ff7070;
  --danger-dk:  #170909;
  --radius:     10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

/* Los controles creados por JavaScript conservan la misma tipografía. */
button { font-family: inherit; }
.reset-icon { width: 20px; height: 20px; vertical-align: middle; fill: none; stroke: currentColor; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.sound-toggle { flex-shrink: 0; }
.sound-toggle[aria-pressed="false"] { color: var(--muted); }
.game-progress-reward {
  position: fixed; z-index: 25; right: 12px; bottom: calc(12px + env(safe-area-inset-bottom));
  max-width: min(420px, calc(100% - 24px)); padding: 9px 13px; border: 1px solid #98c5a4;
  border-radius: 10px; color: #f9f3dc; background: #244a3d; font-weight: 700; pointer-events: none;
}
.game-progress-reward:empty { display: none; }
.game-progress-level-up {
  background: #ffe4a3; color: #3e2e11; border-color: #ffc557;
  box-shadow: 0 5px 22px #161c2c80; animation: level-reward .3s ease-out;
}
@keyframes level-reward { from { opacity: 0; transform: translateY(8px); } }
:focus-visible { outline: 3px solid #f9a825; outline-offset: 3px; }
button.memo-card { padding: 0; border: 0; background: transparent; color: inherit; }
button.memo-card:disabled { opacity: 1; cursor: default; }
button.alpha-key { font-family: inherit; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(135deg, #0e1525, #1b2740);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Header ───────────────────────────────────────────── */
header {
  padding: 10px 16px;
  background: rgba(0,0,0,.28);
  border-bottom: 1px solid rgba(255,255,255,.08);
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo { font-size: 26px; line-height: 1; }
h1   { font-size: 17px; font-weight: 700; line-height: 1.15; }
.brand-sub { font-size: 10px; color: var(--muted); display: block; }

.site-menu { padding: 10px 16px; border-bottom: 1px solid rgba(255,255,255,.08); background: rgba(0,0,0,.17); }
.site-menu > summary { cursor: pointer; font-weight: 700; color: var(--text); min-height: 44px; padding: 11px 12px; border: 1px solid #465570; border-radius: 10px; list-style: none; }
.site-menu > summary::-webkit-details-marker { display: none; }
.site-menu > summary, .nav-group > summary { display: flex; align-items: center; gap: 9px; }
.site-menu > summary::before { content: ''; width: 13px; height: 2px; border-radius: 1px; background: currentColor; box-shadow: 0 4px currentColor, 0 -4px currentColor; flex: 0 0 auto; }
.site-menu > summary::after, .nav-group > summary::after {
  content: ''; width: 7px; height: 7px; border: solid currentColor; border-width: 0 2px 2px 0;
  transform: rotate(45deg); flex: 0 0 auto; margin: -4px 1px 0 auto;
}
.site-menu[open] > summary::after, .nav-group[open] > summary::after { transform: rotate(225deg); margin-top: 4px; }
.site-links { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; max-width: 1300px; margin: auto; }
.site-links a { display: flex; gap: 6px; align-items: center; justify-content: center; min-height: 44px; padding: 9px 12px; border: 1px solid #3b4961; border-radius: 10px; color: var(--muted); text-decoration: none; font-size: 13px; font-weight: 700; text-align: center; }
.site-links a:hover { color: var(--text); border-color: var(--accent); }
.site-links a[aria-current="page"] { color: var(--accent-dk); background: var(--accent); border-color: var(--accent); }
@media (max-width: 700px) {
  .site-menu { padding: 8px 10px; }
  .site-menu[open] .site-links { margin-top: 8px; }
  .site-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-links a { padding: 8px; overflow-wrap: anywhere; }
}

.site-menu > summary { max-width:1300px; margin:auto; }
.site-menu[open] .site-links { margin-top:10px; }
.site-links { display:grid; grid-template-columns:repeat(auto-fit,minmax(185px,1fr)); align-items:start; gap:8px; }
.site-links > a { grid-column:1 / -1; justify-self:start; }
.nav-group { min-width:0; border:1px solid #465570; border-radius:12px; background:#142135; }
.nav-group > summary { display:flex; align-items:center; gap:6px; cursor:pointer; min-height:48px; padding:10px; font-size:13px; font-weight:700; list-style:none; }
.nav-group > summary::-webkit-details-marker { display:none; }
.nav-group:has([aria-current="page"]) > summary { color:var(--accent); }
.nav-count { color:var(--muted); font-size:11px; }
.nav-group-links { display:grid; gap:5px; padding:0 6px 6px; }
.nav-group-links a { justify-content:flex-start; text-align:left; overflow-wrap:anywhere; }
.play-toolbar { display:grid; grid-template-columns:minmax(0,1fr) auto auto; align-items:start; border-bottom:1px solid #ffffff14; }
.play-toolbar > .site-menu { min-width:0; border-bottom:0; }
.site-shortcuts {
  display: flex; align-items: center; gap: 5px; padding: 10px 12px 10px 0;
}
.site-shortcuts a {
  display: inline-flex; align-items: center; gap: 5px; min-height: 44px; padding: 6px 10px;
  border: 1px solid #465570; border-radius: 10px; background: #19253a;
  color: var(--text); font-size: 13px; font-weight: 700; text-decoration: none; white-space: nowrap;
}
.site-shortcuts a:hover { border-color: var(--accent); }
.site-shortcuts .site-points:not([hidden]) {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 7px; border-radius: 8px; background: #ffe3a4; color: #53380f;
  font-size: 12px; line-height: 1.2; font-variant-numeric: tabular-nums;
}
.site-points::before { content: ''; width: 10px; height: 10px; border: 1px solid #815211; border-radius: 50%; background: #f2b639; box-shadow: inset 0 0 0 1px #ffe0a0; }
.profile-link-avatar { flex: 0 0 auto; }
img.profile-link-avatar { width: 26px; height: 26px; }
.profile-link-name { max-width: min(43vw, 250px); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.play-toolbar > .site-menu[open] { grid-column: 1 / -1; }
.play-toolbar:has(> .site-menu[open]) > :is(.site-shortcuts, .play-preferences) { display: none; }
.play-preferences { display:flex; align-items:center; gap:8px; padding:10px 16px 10px 0; min-height:64px; }
.play-preferences label { font-size:13px; color:var(--muted); }
.play-preferences select { min-height:44px; font-size:15px; }
@media(max-width:999px) { .play-toolbar { grid-template-columns:minmax(0,1fr) auto; }.play-preferences { display:none; } }
@media(max-width:700px) {
  .site-links { grid-template-columns:minmax(0,1fr); }
  .play-toolbar > .site-menu > summary { font-size: 14px; padding-inline: 9px; }
  .site-shortcuts { padding: 8px 10px 8px 0; }
  .site-shortcuts a { padding: 6px 7px; }
  .site-shortcuts a > span[aria-hidden="true"]:not(.profile-link-avatar) { display: none; }
}
@media(max-width:420px) {
  .site-shortcuts a:has(.site-points:not([hidden])) { flex-direction: column; justify-content: center; gap: 2px; line-height: 1; padding-block: 3px; }
  .site-shortcuts .site-points:not([hidden]) { padding: 2px 5px; font-size: 11px; }
}

.header-controls {
  display: flex;
  flex-direction: column;
  gap: 7px;
  flex: 1;
  min-width: 0;
}

.controls-row {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-wrap: wrap;
}

.export-label { font-size: 11px; color: var(--muted); white-space: nowrap; }

.control-group {
  display: flex;
  flex-shrink: 0;
  flex-wrap: wrap;
  max-width: 100%;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--muted);
}

select {
  max-width: 100%;
  font-size: 12px;
  background: #24314c;
  color: var(--text);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--radius);
  padding: 6px 9px;
}

.file-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  background: #24314c;
  color: var(--text);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--radius);
  padding: 6px 11px;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
}
.file-btn:hover { filter: brightness(1.15); }

.btn {
  font-size: 12px;
  font-weight: 700;
  background: #24314c;
  color: var(--text);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--radius);
  padding: 6px 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: filter .15s;
}
.btn:hover          { filter: brightness(1.15); }
.btn:disabled       { opacity: 0.38; cursor: default; filter: none; }
.btn.accent         { background: var(--accent);  color: var(--accent-dk); border: none; }
.btn.danger         { background: var(--danger);  color: var(--danger-dk); border: none; }
.btn.export         { background: #222f4a; color: #8a9ac8; border-color: rgba(100,120,200,.25); font-size: 11px; padding: 5px 9px; }
.btn.export:not(:disabled):hover { background: #3a4e80; color: #fff; filter: none; }

/* ── Main / Canvas ────────────────────────────────────── */
main { flex: 1; display: flex; justify-content: center; padding: 12px 14px 8px; }

.canvas-wrap { width: 100%; max-width: 1280px; position: relative; }

/* ── Cronómetro ───────────────────────────────────────── */
.timer-text {
  font-size: 13px; font-weight: 700; color: #55d6be;
  white-space: nowrap; min-width: 54px; letter-spacing: .03em;
  font-variant-numeric: tabular-nums;
}
.bar-sep {
  width: 1px; height: 16px;
  background: rgba(255,255,255,.18); flex-shrink: 0;
}

/* ── Barra overlay del puzzle ─────────────────────────── */
.puzzle-bar {
  display: none;
  align-items: center;
  gap: 8px;
  position: absolute;
  bottom: 20px;
  right: 24px;
  background: rgba(10, 18, 32, 0.82);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 12px;
  padding: 6px 10px;
  backdrop-filter: blur(6px);
  pointer-events: auto;
}
.puzzle-bar.visible { display: flex; }

.encajadas-text {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  margin-right: 4px;
}

.btn-canvas {
  font-size: 11px;
  font-weight: 700;
  background: #24314c;
  color: var(--text);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 8px;
  padding: 5px 10px;
  cursor: pointer;
  white-space: nowrap;
  transition: filter .15s;
}
.btn-canvas:hover         { filter: brightness(1.18); }
.btn-canvas.danger        { background: var(--danger);  color: var(--danger-dk); border: none; }
.btn-canvas.warn          { background: rgba(249,168,37,.18); color: #f9a825;
                            border: 1px solid rgba(249,168,37,.35); }

.hint {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
  line-height: 1.55;
}

canvas {
  width: 100%;
  display: block;
  background: #0c1220;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 18px;
  box-shadow: 0 20px 50px rgba(0,0,0,.38);
  /* Fix bug: evita que el scroll interfiera con el drag en móvil */
  touch-action: none;
  cursor: default;
}

/* ── Footer ───────────────────────────────────────────── */
footer {
  background: rgba(0,0,0,.25);
  border-top: 1px solid rgba(255,255,255,.07);
  padding: 14px 20px;
  margin-top: auto;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
}

.yt-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #ff4444;
  text-decoration: none;
  font-size: 12px;
  font-weight: 700;
  transition: opacity .2s;
}
.yt-link svg { flex-shrink: 0; }
.yt-link:hover { opacity: 0.75; }

.footer-copy { font-size: 11px; color: var(--muted); }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 700px) {
  header            { padding: 8px 10px; gap: 8px; }
  h1                { font-size: 14px; }
  .header-controls  { width: 100%; }
  .puzzle-bar       { position: static; flex-wrap: wrap; justify-content: center; margin-top: 10px; }
  .footer-inner     { flex-direction: column; align-items: flex-start; gap: 6px; }
}