/* ================================================================
   BUSCA-RITMES · Level Selector — Premium Dark · Fullscreen
   ================================================================ */

:root {
  --bg:     #05050d;
  --glass:  rgba(255,255,255,0.04);
  --border: rgba(255,255,255,0.08);
  --txt:    #eeeef8;
  --dim:    #50507a;
  --acc:    #6650f0;
}

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

html, body { height: 100%; }

body {
  height: 100vh;
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  color: var(--txt);
  overflow: hidden;
}

@media (max-height: 700px) { body { overflow-y: auto; } }

body::before {
  content: '';
  position: fixed; inset: 0;
  background:
    radial-gradient(ellipse 65% 50% at 15% 12%, rgba(102,80,240,.12) 0%, transparent 55%),
    radial-gradient(ellipse 50% 40% at 88% 88%, rgba(61,142,240,.09) 0%, transparent 55%);
  pointer-events: none; z-index: 0;
}

.bg-grid {
  position: fixed; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

/* ── Page layout — ocupa tota la pantalla ────────────────── */
.page {
  position: relative; z-index: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  padding: 28px 32px 24px;
  gap: 0;
}

/* ── Header ──────────────────────────────────────────────── */
.lvl-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  margin-bottom: 24px;
  animation: fadeUp .5s cubic-bezier(.16,1,.3,1);
}

.lvl-header-txt { text-align: center; }

.lvl-header h1 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -.03em;
  background: linear-gradient(135deg, #fff 0%, #a8b8ff 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.lvl-header p {
  font-size: .68rem;
  color: var(--dim);
  letter-spacing: .14em;
  text-transform: uppercase;
  margin-top: 3px;
}

.back-btn {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--glass);
  color: var(--txt);
  text-decoration: none;
  font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  transition: background .15s, transform .15s;
  flex-shrink: 0;
}
.back-btn:hover { background: rgba(255,255,255,.10); transform: scale(1.08); }

/* ── Grid — ocupa l'espai restant ────────────────────────── */
.levels-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 18px;
  flex: 1;          /* ocupa tot l'espai vertical disponible */
  min-height: 0;    /* imprescindible per a flex children */
}

@media (max-width: 900px)  { .levels-grid { grid-template-columns: repeat(2, 1fr); grid-template-rows: repeat(4, 1fr); } }
@media (max-width: 500px)  { .levels-grid { grid-template-columns: 1fr; grid-template-rows: repeat(8, auto); overflow-y: auto; } }

/* ── Carta de nivell ─────────────────────────────────────── */
.lvl-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 26px 24px 22px;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 22px;
  text-decoration: none;
  color: var(--txt);
  cursor: pointer;
  overflow: hidden;
  transition: box-shadow .3s ease, border-color .3s ease;
  animation: cardIn .55s cubic-bezier(.16,1,.3,1) backwards;
  isolation: isolate;
  min-height: 0;
}

/* Gradient tint de color */
.lvl-card::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(145deg, var(--accent, transparent) 0%, transparent 55%);
  opacity: 0;
  transition: opacity .3s;
  border-radius: inherit;
  pointer-events: none;
}

/* Shimmer rotatiu */
.lvl-card::after {
  content: '';
  position: absolute; top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: conic-gradient(from 0deg, transparent 0%, rgba(255,255,255,.04) 25%, transparent 50%);
  opacity: 0;
  transition: opacity .3s, transform .6s;
  pointer-events: none;
}

.lvl-card:hover {
  border-color: var(--accent, var(--border));
  box-shadow:
    0 0 0 1px var(--accent, transparent),
    0 24px 70px var(--glow, rgba(0,0,0,.3)),
    0 8px 28px rgba(0,0,0,.45);
}
.lvl-card:hover::before { opacity: .08; }
.lvl-card:hover::after  { opacity: 1; transform: rotate(30deg); }

@keyframes cardIn {
  from { opacity:0; transform:translateY(22px) scale(.96); }
  to   { opacity:1; transform:translateY(0) scale(1); }
}

/* ── Card: zona superior ─────────────────────────────────── */
.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.card-tempo {
  font-family: "SF Mono", ui-monospace, monospace;
  font-size: .72rem;
  font-weight: 600;
  color: var(--accent, var(--dim));
  letter-spacing: .06em;
}

.card-badge {
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--dim);
  background: rgba(255,255,255,.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px 9px;
}

/* ── Card: nom i descripció ──────────────────────────────── */
.card-center { display: flex; flex-direction: column; gap: 6px; }

.card-name {
  font-size: clamp(1.6rem, 2.2vw, 2rem);
  font-weight: 800;
  letter-spacing: -.03em;
  color: var(--txt);
  line-height: 1;
  transition: color .2s;
}
.lvl-card:hover .card-name { color: var(--accent, var(--txt)); }

.card-desc {
  font-size: .78rem;
  color: var(--dim);
  line-height: 1.4;
}

/* ── Card: zona inferior ─────────────────────────────────── */
.card-bottom { display: flex; flex-direction: column; gap: 8px; }

.card-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mine-count {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: .74rem;
  color: var(--dim);
}

.card-stars { display: flex; gap: 2px; }
.star { font-size: .9rem; color: rgba(255,255,255,.13); transition: color .2s; }
.star.lit  { color: #f5c542; filter: drop-shadow(0 0 4px rgba(245,197,66,.5)); }

/* Barra de dificultat */
.diff-bar { display: flex; gap: 3px; }
.dseg {
  flex: 1; height: 5px; border-radius: 3px;
  background: rgba(255,255,255,.07);
  transition: background .3s;
}
.dseg.filled { background: var(--accent, rgba(255,255,255,.25)); }

/* Millor temps */
.card-best {
  font-size: .7rem;
  color: var(--dim);
  letter-spacing: .02em;
}
.card-best strong { color: var(--accent, var(--txt)); }

/* ── Footer ──────────────────────────────────────────────── */
.lvl-foot {
  flex-shrink: 0;
  padding-top: 16px;
  text-align: center;
  font-size: .56rem;
  letter-spacing: .14em;
  color: rgba(255,255,255,.1);
  text-transform: uppercase;
}

@keyframes fadeUp {
  from { opacity:0; transform:translateY(14px); }
  to   { opacity:1; transform:translateY(0); }
}