/* ===== TETRIS ULTIMATE PRO — CSS ===== */
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Share+Tech+Mono&display=swap');

:root {
  --bg:        #020408;
  --bg2:       #060d14;
  --panel:     #0a1520;
  --border:    #0ff;
  --border2:   #0a4050;
  --accent:    #0ff;
  --accent2:   #f0f;
  --accent3:   #ff0;
  --text:      #cce;
  --text-dim:  #456;
  --glow:      0 0 8px #0ff, 0 0 20px #0ff4;
  --glow2:     0 0 8px #f0f, 0 0 20px #f0f4;
  --glow3:     0 0 8px #ff0, 0 0 20px #ff04;

  /* PIECE COLORS */
  --I: #0ff;
  --O: #ff0;
  --T: #c0f;
  --S: #0f4;
  --Z: #f22;
  --J: #04f;
  --L: #f80;

  --cell-size: 30px;
  --font-main: 'Orbitron', sans-serif;
  --font-mono: 'Share Tech Mono', monospace;
}

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

html, body {
  width: 100%; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-main);
  overflow: hidden;
  user-select: none;
}

/* ===== SCREENS ===== */
.screen {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity .3s ease;
  overflow: hidden;
}
.screen.active { opacity: 1; pointer-events: all; }

/* SCANLINES */
.scanlines {
  position: absolute; inset: 0; z-index: 100; pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent, transparent 2px,
    rgba(0,0,0,.18) 2px, rgba(0,0,0,.18) 4px
  );
}

/* BG GRID */
.bg-grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(0,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,255,255,.04) 1px, transparent 1px);
  background-size: 40px 40px;
  animation: gridScroll 20s linear infinite;
}
@keyframes gridScroll { to { background-position: 0 40px; } }

/* ===== MAIN MENU ===== */
.menu-container {
  position: relative; z-index: 10;
  display: flex; flex-direction: column;
  align-items: center; gap: 24px;
  padding: 40px;
}

.logo-wrap {
  text-align: center;
  line-height: 1;
  position: relative;
}
.logo-sub {
  font-size: 14px; letter-spacing: 12px;
  color: var(--accent2);
  text-shadow: var(--glow2);
  margin-bottom: 4px;
}
.logo-main {
  font-size: clamp(52px, 10vw, 96px);
  font-weight: 900;
  color: var(--accent);
  text-shadow: var(--glow), 0 0 60px #0ff8;
  letter-spacing: 8px;
  animation: pulse 3s ease-in-out infinite;
}
.logo-pro {
  font-size: 22px; letter-spacing: 18px;
  color: var(--accent3);
  text-shadow: var(--glow3);
  margin-top: 4px;
}
.logo-glow {
  position: absolute; left: 50%; bottom: -20px;
  width: 80%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transform: translateX(-50%);
  box-shadow: var(--glow);
}
@keyframes pulse {
  0%,100% { text-shadow: var(--glow), 0 0 60px #0ff8; }
  50%      { text-shadow: 0 0 4px #0ff, 0 0 80px #0ffb; }
}

.main-nav {
  display: flex; flex-direction: column; gap: 12px;
  width: 320px; margin-top: 16px;
}

/* ===== BUTTONS ===== */
.nav-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--accent);
  font-family: var(--font-main);
  font-size: 14px;
  letter-spacing: 3px;
  padding: 14px 28px;
  cursor: pointer;
  position: relative;
  transition: all .2s;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  text-transform: uppercase;
}
.nav-btn::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(0,255,255,.08), transparent);
  opacity: 0; transition: opacity .2s;
}
.nav-btn:hover {
  background: rgba(0,255,255,.2);
  box-shadow: var(--glow), inset 0 0 20px rgba(0,255,255,.15);
  color: #fff;
  transform: translateX(4px);
  border-color: var(--accent);
}
.nav-btn:hover::before { opacity: 1; }
.nav-btn:active { transform: translateX(2px) scale(.98); }
.nav-btn:focus { outline: none; box-shadow: var(--glow), inset 0 0 15px rgba(0,255,255,.2); border-color: var(--accent); }

.nav-btn.small-btn {
  font-size: 11px; padding: 8px 16px;
}
.back-btn { align-self: flex-start; margin-top: 8px; }

.version-tag {
  font-family: var(--font-mono);
  font-size: 10px; color: var(--text-dim);
  letter-spacing: 2px;
}

/* ===== SCREEN TITLE ===== */
.screen-title {
  font-size: 28px; font-weight: 900;
  letter-spacing: 6px;
  color: var(--accent);
  text-shadow: var(--glow);
  text-align: center;
  margin-bottom: 8px;
}

/* ===== MODE SELECT ===== */
.mode-cards {
  display: flex; gap: 20px;
  flex-wrap: wrap; justify-content: center;
}
.mode-card {
  border: 1px solid var(--border2);
  background: var(--panel);
  padding: 28px 24px;
  cursor: pointer;
  transition: all .25s;
  text-align: center;
  width: 180px;
  clip-path: polygon(12px 0,100% 0,calc(100%-12px) 100%,0 100%);
}
.mode-card:hover {
  border-color: var(--accent);
  box-shadow: var(--glow), inset 0 0 25px rgba(0,255,255,.15);
  transform: translateY(-6px);
  background: rgba(0,255,255,.1);
}
.mode-card:active {
  transform: translateY(-2px) scale(.98);
}
.mode-card:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--glow), inset 0 0 20px rgba(0,255,255,.2);
}
.mode-icon { font-size: 36px; margin-bottom: 10px; }
.mode-name { font-size: 13px; font-weight: 700; letter-spacing: 2px; color: var(--accent); margin-bottom: 8px; }
.mode-desc { font-size: 10px; font-family: var(--font-mono); color: var(--text-dim); line-height: 1.5; }

/* ===== INSTRUCTIONS ===== */
.instructions-container { max-width: 700px; }
.instructions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px; width: 100%;
}
.instr-section {
  background: var(--panel);
  border: 1px solid var(--border2);
  padding: 20px;
}
.instr-section.full-width { grid-column: 1 / -1; }
.instr-section h3 {
  font-size: 12px; letter-spacing: 3px; color: var(--accent2);
  margin-bottom: 14px; text-shadow: var(--glow2);
}
.key-list { display: flex; flex-direction: column; gap: 8px; }
.key-row {
  font-family: var(--font-mono); font-size: 12px; color: var(--text);
  display: flex; align-items: center; gap: 8px;
}
kbd {
  background: rgba(0,255,255,.1);
  border: 1px solid var(--border);
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  border-radius: 2px;
}
.score-table { display: flex; flex-direction: column; gap: 6px; }
.score-row {
  display: flex; justify-content: space-between;
  font-family: var(--font-mono); font-size: 12px; color: var(--text);
  border-bottom: 1px solid var(--border2); padding-bottom: 4px;
}

/* ===== RANKING ===== */
.ranking-tabs {
  display: flex; gap: 8px; margin-bottom: 16px;
}
.rank-tab {
  background: transparent;
  border: 1px solid var(--border2);
  color: var(--text-dim);
  font-family: var(--font-main);
  font-size: 10px; letter-spacing: 2px;
  padding: 8px 16px; cursor: pointer;
  transition: all .2s;
}
.rank-tab.active, .rank-tab:hover, .rank-tab:focus {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0,255,255,.15);
  box-shadow: var(--glow), inset 0 0 15px rgba(0,255,255,.1);
  outline: none;
}
.ranking-list {
  width: 500px; min-height: 300px;
  background: var(--panel);
  border: 1px solid var(--border2);
  padding: 16px;
}
.rank-row {
  display: grid; grid-template-columns: 40px 1fr 1fr 80px;
  font-family: var(--font-mono); font-size: 13px;
  padding: 8px 4px; border-bottom: 1px solid var(--border2);
  align-items: center;
}
.rank-pos { color: var(--accent3); font-weight: 700; }
.rank-name { color: var(--text); }
.rank-score { color: var(--accent); text-align: right; }
.rank-date { color: var(--text-dim); font-size: 10px; text-align: right; }
.rank-empty {
  text-align: center; color: var(--text-dim);
  font-family: var(--font-mono); font-size: 12px;
  padding: 40px; letter-spacing: 2px;
}
.rank-gold   .rank-pos { color: #ffd700; text-shadow: 0 0 8px #ffd700; }
.rank-silver .rank-pos { color: #c0c0c0; text-shadow: 0 0 8px #c0c0c0; }
.rank-bronze .rank-pos { color: #cd7f32; text-shadow: 0 0 8px #cd7f32; }

/* ===== GAME LAYOUT ===== */
.game-layout {
  display: flex; align-items: flex-start; justify-content: center;
  gap: 16px; padding: 20px;
  width: 100%; height: 100%;
}

.board-wrap {
  position: relative;
  display: flex; flex-direction: column; align-items: center;
}
.board-header {
  font-size: 11px; letter-spacing: 3px; color: var(--accent);
  text-shadow: var(--glow);
  margin-bottom: 6px;
}
canvas#p1-canvas, canvas#vs-p1-canvas, canvas#vs-p2-canvas {
  border: 1px solid var(--border);
  box-shadow: var(--glow), inset 0 0 30px rgba(0,0,0,.5);
  display: block;
  image-rendering: pixelated;
}

.board-overlay {
  position: absolute;
  inset: 28px 0 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 32px; font-weight: 900; letter-spacing: 4px;
  color: var(--accent);
  text-shadow: var(--glow);
  pointer-events: none;
  opacity: 0; transition: opacity .3s;
  background: rgba(2,4,8,.7);
  z-index: 5;
}
.board-overlay.visible { opacity: 1; }

/* SIDE PANELS */
.side-panel {
  display: flex; flex-direction: column; gap: 16px;
  min-width: 130px;
}

/* CPU SECTION — posicionado al lado del right-panel */
#cpu-section {
  display: none;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}

/* CPU in single player view — beside right panel (not inside) */
#screen-game .game-layout {
  flex-wrap: wrap;
}
#screen-game #cpu-section {
  display: flex;
  align-items: flex-start;
  min-width: 210px;
}
.panel-block {
  background: var(--panel);
  border: 1px solid var(--border2);
  padding: 10px 12px;
  clip-path: polygon(6px 0,100% 0,calc(100%-6px) 100%,0 100%);
}
.panel-label {
  font-size: 9px; letter-spacing: 3px; color: var(--text-dim);
  margin-bottom: 4px;
}
.panel-value {
  font-size: 22px; font-weight: 700; color: var(--accent);
  text-shadow: var(--glow);
  font-family: var(--font-mono);
}
.combo-val { color: var(--accent2); text-shadow: var(--glow2); }
.record-val { color: var(--accent3); text-shadow: var(--glow3); font-size: 16px; }

canvas#p1-hold-canvas,
canvas#p1-next-canvas,
canvas#vs-p1-next,
canvas#vs-p2-next {
  display: block;
  background: rgba(0,0,0,.3);
  border: 1px solid var(--border2);
}

/* ===== PAUSE ===== */
.pause-overlay {
  position: absolute; inset: 0;
  background: rgba(2,4,8,.85);
  display: flex; align-items: center; justify-content: center;
  z-index: 50;
}
.pause-overlay.hidden { display: none; }
.pause-box .nav-btn:hover {
  background: rgba(0,255,255,.2);
  box-shadow: var(--glow), inset 0 0 20px rgba(0,255,255,.15);
  border-color: var(--accent);
}
.pause-box {
  display: flex; flex-direction: column; align-items: center; gap: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: var(--glow);
  padding: 40px 60px;
}
.pause-title {
  font-size: 36px; font-weight: 900; letter-spacing: 8px;
  color: var(--accent); text-shadow: var(--glow);
}

/* ===== VERSUS LAYOUT ===== */
.versus-layout {
  align-items: center;
}
.versus-side {
  display: flex; gap: 12px; align-items: flex-start;
}
.versus-center {
  display: flex; flex-direction: column; align-items: center; gap: 20px;
  min-width: 80px;
}
.vs-badge {
  font-size: 28px; font-weight: 900; color: var(--accent2);
  text-shadow: var(--glow2);
  letter-spacing: 4px;
  animation: vsFlash 2s ease-in-out infinite;
}
@keyframes vsFlash {
  0%,100% { opacity: 1; }
  50%      { opacity: .4; }
}
.vs-wins {
  display: flex; flex-direction: column; gap: 12px;
}
.win-block { text-align: center; }
.win-label { font-size: 8px; letter-spacing: 2px; color: var(--text-dim); }
.win-val {
  font-size: 32px; font-weight: 900;
  color: var(--accent3); text-shadow: var(--glow3);
  font-family: var(--font-mono);
}

/* ===== GAME OVER ===== */
.gameover-container {
  position: relative; z-index: 10;
  display: flex; flex-direction: column; align-items: center; gap: 24px;
  padding: 48px 60px;
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: var(--glow), 0 0 80px rgba(0,255,255,.1);
  min-width: 400px;
}
.go-title {
  font-size: clamp(32px, 6vw, 56px);
  font-weight: 900; letter-spacing: 6px;
  color: var(--accent2); text-shadow: var(--glow2);
  animation: goFlash .8s ease-in-out infinite;
}
@keyframes goFlash {
  0%,100% { opacity: 1; }
  50%      { opacity: .6; }
}
.go-results {
  font-family: var(--font-mono); font-size: 13px;
  color: var(--text); text-align: center; line-height: 1.8;
  background: rgba(0,0,0,.3);
  padding: 16px 24px;
  border: 1px solid var(--border2);
  width: 100%;
}
.go-name-wrap {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  width: 100%;
}
.go-name-wrap label {
  font-size: 10px; letter-spacing: 3px; color: var(--text-dim);
}
#go-name-input {
  background: rgba(0,255,255,.05);
  border: 1px solid var(--border);
  color: var(--accent);
  font-family: var(--font-main);
  font-size: 20px; letter-spacing: 4px;
  padding: 10px 16px; text-align: center;
  width: 100%; outline: none;
  text-transform: uppercase;
}
#go-name-input:focus { box-shadow: var(--glow); }

.go-buttons { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

/* ===== COMBO FLASH ===== */
.combo-flash {
  position: fixed;
  font-size: 48px; font-weight: 900;
  color: var(--accent3); text-shadow: var(--glow3);
  pointer-events: none; z-index: 200;
  animation: comboAnim .8s ease-out forwards;
}
@keyframes comboAnim {
  0%   { opacity: 1; transform: scale(.6) translateY(0); }
  40%  { opacity: 1; transform: scale(1.3) translateY(-20px); }
  100% { opacity: 0; transform: scale(1) translateY(-60px); }
}

/* ===== LINE CLEAR FLASH ===== */
@keyframes rowFlash {
  0%,100% { opacity: 1; }
  50%      { opacity: 0; }
}

/* ===== GHOST PIECE ===== */
/* rendered in canvas */

/* ===== RESPONSIVE ===== */
@media (max-height: 700px) {
  .game-layout { padding: 8px; gap: 8px; }
  .panel-value  { font-size: 16px; }
}
@media (max-width: 900px) {
  .versus-layout { transform: scale(.8); transform-origin: center top; }
}

/* ===== CPU SECTION ===== */
#cpu-section {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
}
.cpu-header {
  font-size: 11px;
  letter-spacing: 3px;
  color: #0f4;
  text-shadow: 0 0 8px #0f4;
  font-family: var(--font-main);
  align-self: flex-start;
  width: 100%;
}
#cpu-canvas {
  border: 1px solid #0f44;
  box-shadow: 0 0 10px #0f43, inset 0 0 20px rgba(0,0,0,.6);
  display: block;
  image-rendering: pixelated;
}
.cpu-stats {
  display: flex;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 1px;
}
.cpu-stats span span {
  color: #0f4;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--border2); }

/* ===== VERSUS KEY HINTS ===== */
.keys-hint .hint-keys {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  line-height: 1.7;
}
.keys-hint kbd {
  font-size: 9px;
  padding: 1px 5px;
}
.p1-header-label { color: #0f4; text-shadow: 0 0 8px #0f4; }
.p2-header-label { color: var(--accent); text-shadow: var(--glow); }