/* ============================================================
   ARCANE TETRIS — styles.css
   Fully responsive · Arcane teal · Dark fantasy
============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; }

body {
  background: #020a0f;
  color: #c8e8e0;
  font-family: 'Share Tech Mono', monospace;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  overflow: hidden;
}

/* ── Background ── */
.bg-orbs { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.bg-orb {
  position: absolute; border-radius: 50%;
  filter: blur(100px); opacity: 0.15;
  animation: orb-drift 18s ease-in-out infinite alternate;
}
.orb-1 { width: 500px; height: 500px; background: #00ffc8; top: -100px; left: -100px; }
.orb-2 { width: 400px; height: 400px; background: #0044ff; bottom: -80px; right: -80px; animation-duration: 22s; }
@keyframes orb-drift { from{transform:translate(0,0);} to{transform:translate(30px,-25px);} }

.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(0,255,200,0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,255,200,0.018) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* ── Back link ── */
.back-link {
  position: fixed; top: 0.9rem; left: 1rem; z-index: 100;
  font-size: 0.68rem; letter-spacing: 0.12em;
  color: rgba(0,255,200,0.4); text-decoration: none; transition: color .2s;
}
.back-link:hover { color: #00ffc8; }

/* ── Overlays ── */
.overlay {
  position: fixed; inset: 0; z-index: 500;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,5,10,0.88); backdrop-filter: blur(8px);
}
.overlay.hidden { display: none; }

.overlay-panel {
  background: rgba(4,15,20,0.97);
  border: 1px solid rgba(0,255,200,0.25);
  border-radius: 16px; padding: 2.5rem 2rem;
  max-width: 400px; width: 90%;
  text-align: center;
  box-shadow: 0 0 60px rgba(0,255,200,0.08);
  animation: panel-in .3s ease-out;
}
.overlay-panel.small { max-width: 320px; padding: 2rem 1.5rem; }
@keyframes panel-in { from{opacity:0;transform:translateY(12px);} to{opacity:1;transform:none;} }
.overlay-panel::before {
  content:''; display:block; height:2px;
  background: linear-gradient(90deg,transparent,rgba(0,255,200,0.5),transparent);
  margin-bottom: 1.5rem; border-radius: 2px;
}

.overlay-runes {
  display: flex; justify-content: center; gap: 1.2rem;
  margin-bottom: 1rem;
  font-size: 1.4rem; color: rgba(0,255,200,0.5);
  animation: rune-pulse 3s ease-in-out infinite;
}
@keyframes rune-pulse { 0%,100%{opacity:.4;} 50%{opacity:.9;} }

.overlay-title {
  font-family: 'Cinzel', serif;
  font-size: 2rem; font-weight: 700;
  color: #00ffc8;
  text-shadow: 0 0 20px rgba(0,255,200,0.4);
  margin-bottom: 0.5rem;
}
.overlay-sub {
  font-size: 0.85rem; color: rgba(200,232,224,0.6);
  margin-bottom: 1.5rem; line-height: 1.6;
  font-style: italic;
}

.btn-primary {
  font-family: 'Orbitron', monospace; font-size: 0.75rem;
  letter-spacing: 0.15em; text-transform: uppercase;
  background: rgba(0,255,200,0.15);
  border: 1px solid rgba(0,255,200,0.5);
  color: #00ffc8; padding: 0.8rem 2rem; border-radius: 8px;
  cursor: pointer; transition: all .2s; display: block; width: 100%;
  margin-bottom: 0.75rem;
}
.btn-primary:hover { background: rgba(0,255,200,0.25); box-shadow: 0 0 20px rgba(0,255,200,0.3); }

.btn-secondary {
  font-family: 'Orbitron', monospace; font-size: 0.7rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  color: rgba(200,232,224,0.6); padding: 0.7rem 1.5rem; border-radius: 8px;
  cursor: pointer; transition: all .2s; display: block; width: 100%;
}
.btn-secondary:hover { background: rgba(255,80,80,0.1); border-color: rgba(255,80,80,0.3); color: #ff8080; }

.overlay-btns { display: flex; flex-direction: column; gap: 0.6rem; margin-top: 1rem; }

.controls-hint {
  margin-top: 1.2rem; font-size: 0.68rem;
  letter-spacing: 0.06em; color: rgba(0,255,200,0.35);
  display: flex; flex-direction: column; gap: 0.3rem;
  border-top: 1px solid rgba(0,255,200,0.08);
  padding-top: 1rem;
}

/* ── Game Over stats ── */
.go-stats {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 0.75rem; margin: 1rem 0;
}
.go-stat {
  background: rgba(0,255,200,0.04);
  border: 1px solid rgba(0,255,200,0.12);
  border-radius: 8px; padding: 0.6rem;
  display: flex; flex-direction: column; gap: 0.2rem;
}
.go-label {
  font-size: 0.55rem; letter-spacing: 0.2em;
  color: rgba(0,255,200,0.45); text-transform: uppercase;
}
.go-val {
  font-family: 'Orbitron', monospace; font-size: 1.1rem;
  font-weight: 700; color: #00ffc8;
}

/* ── Game layout ── */
.game-layout {
  position: relative; z-index: 1;
  display: flex; align-items: flex-start;
  justify-content: center; gap: 1rem;
  padding: 0.5rem;
}

/* ── Canvas ── */
.canvas-wrap {
  position: relative;
  border: 1px solid rgba(0,255,200,0.25);
  border-radius: 4px;
  box-shadow: 0 0 30px rgba(0,255,200,0.1), inset 0 0 20px rgba(0,0,0,0.5);
}
#gameCanvas { display: block; background: #030d12; }

/* ── HUD panels ── */
.hud {
  display: flex; flex-direction: column; gap: 0.75rem;
  min-width: 90px;
}
.hud-left { align-items: flex-end; }
.hud-right { align-items: flex-start; }

.hud-block {
  background: rgba(0,15,20,0.7);
  border: 1px solid rgba(0,255,200,0.1);
  border-radius: 8px; padding: 0.5rem 0.75rem;
  min-width: 88px; text-align: center;
}
.hud-label {
  font-size: 0.52rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: rgba(0,255,200,0.4);
  margin-bottom: 0.2rem;
}
.hud-val {
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  font-weight: 700; color: #00ffc8;
  text-shadow: 0 0 8px rgba(0,255,200,0.4);
}

#nextCanvas, #holdCanvas {
  display: block; background: rgba(0,0,0,0.3);
  border-radius: 4px; margin: 0.25rem auto 0;
  border: 1px solid rgba(0,255,200,0.08);
}

.hud-btns {
  display: flex; flex-direction: column; gap: 0.4rem; margin-top: 0.25rem;
}
.btn-hud {
  font-family: 'Orbitron', monospace; font-size: 0.58rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  background: rgba(0,255,200,0.06);
  border: 1px solid rgba(0,255,200,0.2);
  color: rgba(0,255,200,0.7); padding: 0.45rem 0.6rem;
  border-radius: 6px; cursor: pointer; transition: all .2s;
  min-width: 88px;
}
.btn-hud:hover { background: rgba(0,255,200,0.15); }
.btn-hud-quit { border-color: rgba(255,80,80,0.2); color: rgba(255,120,120,0.7); }
.btn-hud-quit:hover { background: rgba(255,80,80,0.1); }

/* ── Touch controls ── */
.touch-row {
  position: relative; z-index: 10;
  display: none;
  gap: 0.4rem; padding: 0.5rem;
  margin-top: 0.5rem;
}
@media (pointer:coarse)  { .touch-row { display: flex; } }
@media (max-width:600px) { .touch-row { display: flex; } }

.t-btn {
  font-size: 1rem; width: 52px; height: 44px;
  background: rgba(0,255,200,0.07);
  border: 1px solid rgba(0,255,200,0.25);
  color: #00ffc8; border-radius: 8px; cursor: pointer;
  transition: all .15s; user-select: none;
  -webkit-tap-highlight-color: transparent;
  display: flex; align-items: center; justify-content: center;
}
.t-btn:active, .t-btn.pressed {
  background: rgba(0,255,200,0.22);
  box-shadow: 0 0 12px rgba(0,255,200,0.3);
}
.t-rotate { background: rgba(157,127,255,0.1); border-color: rgba(157,127,255,0.3); color: #9d7fff; }
.t-drop   { background: rgba(255,80,80,0.1);   border-color: rgba(255,80,80,0.3);   color: #ff6060; }

/* ── Line clear flash ── */
.canvas-wrap.flash { animation: line-flash .15s ease-out; }
@keyframes line-flash { 0%{box-shadow:0 0 40px rgba(0,255,200,0.8);} 100%{box-shadow:0 0 30px rgba(0,255,200,0.1);} }

/* ── Responsive ── */
@media (max-width: 700px) {
  .game-layout { gap: 0.5rem; }
  .hud { min-width: 70px; }
  .hud-block { min-width: 68px; padding: 0.4rem 0.5rem; }
  .btn-hud { min-width: 68px; font-size: 0.52rem; }
  #nextCanvas, #holdCanvas { width: 72px !important; height: 72px !important; }
}
@media (max-width: 480px) {
  .hud-left { display: none; }
  .game-layout { gap: 0.4rem; }
}