@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Rajdhani:wght@300;400;600;700&family=Cinzel:wght@400;600&display=swap');

:root {
  --gold:       #c9a84c;
  --gold-light: #e8c97a;
  --gold-dark:  #8a6a2a;
  --gold-glow:  rgba(201,168,76,.4);
  --bg:         #0e0b05;
  --panel-bg:   linear-gradient(160deg,#3a2a0c,#1e1408);
  --panel-b:    #7a5a1a;
  --ok:         #60d870;
  --err:        #e06060;
  --hint:       #60b8e8;
  --p1:         #e8c97a;
  --p2:         #60b8e8;
}
*{box-sizing:border-box;margin:0;padding:0;}
body{
  background:var(--bg);
  background-image:radial-gradient(ellipse at 15% 15%,#241806 0%,transparent 55%),
                   radial-gradient(ellipse at 85% 85%,#160e03 0%,transparent 55%);
  min-height:100vh; display:flex; flex-direction:column; align-items:center;
  padding:16px 10px 60px; font-family:'Rajdhani',sans-serif; color:var(--gold-light);
  user-select:none;
}
h1{
  font-family:'Orbitron',monospace; font-weight:900;
  font-size:clamp(1.4rem,4vw,2.2rem); letter-spacing:.2em; color:var(--gold-light);
  text-shadow:0 0 30px var(--gold-glow),0 0 70px rgba(201,168,76,.15);
  text-transform:uppercase; margin-bottom:2px;
}
.subtitle{
  font-family:'Cinzel',serif; font-size:.72rem; color:var(--gold-dark);
  letter-spacing:.3em; text-transform:uppercase; margin-bottom:14px;
}

/* ─── TABS ─────────────────────────────────────────────────────── */
.tab-nav{
  display:flex; gap:4px; margin-bottom:16px;
  background:rgba(0,0,0,.4); padding:5px; border-radius:12px;
  border:1px solid rgba(138,106,42,.25); flex-wrap:wrap; justify-content:center;
}
.tab-btn{
  font-family:'Orbitron',monospace; font-size:.58rem; font-weight:700;
  letter-spacing:.09em; padding:8px 18px; border-radius:8px;
  border:none; cursor:pointer; text-transform:uppercase; transition:all .25s;
  background:transparent; color:var(--gold-dark);
}
.tab-btn:hover{color:var(--gold-light); background:rgba(201,168,76,.08);}
.tab-btn.active{
  background:linear-gradient(135deg,var(--gold),var(--gold-dark));
  color:#1a1005; box-shadow:0 2px 14px rgba(201,168,76,.35);
}
.tab-content{display:none; width:100%; max-width:1160px;}
.tab-content.active{display:block;}

/* ─── GAME TAB ─────────────────────────────────────────────────── */
.main-layout{display:flex;gap:14px;align-items:flex-start;width:100%;}
.game-col{
  flex:1 1 auto; min-width:0;
  background:var(--panel-bg); border:2px solid var(--panel-b); border-radius:18px;
  padding:14px 12px 16px;
  box-shadow:0 0 50px rgba(201,168,76,.1),inset 0 0 40px rgba(0,0,0,.5);
}
.side-col{flex:0 0 290px;display:flex;flex-direction:column;gap:12px;}
.side-panel{
  background:var(--panel-bg); border:2px solid var(--panel-b); border-radius:18px;
  padding:14px 13px;
  box-shadow:0 0 40px rgba(201,168,76,.07),inset 0 0 30px rgba(0,0,0,.4);
}
.panel-title{
  font-family:'Orbitron',monospace;font-size:.7rem;font-weight:700;
  letter-spacing:.13em;color:var(--gold-light);margin-bottom:10px;
  text-align:center;text-transform:uppercase;
}
.options{
  display:flex;align-items:center;gap:12px;justify-content:center;margin-bottom:10px;
  font-size:.73rem;color:var(--gold-dark);font-weight:600;letter-spacing:.07em;flex-wrap:wrap;
}
.options label{display:flex;align-items:center;gap:5px;cursor:pointer;}
select{
  background:#1a1005;color:var(--gold-light);border:1px solid var(--gold-dark);
  border-radius:5px;padding:2px 8px;font-family:'Rajdhani',sans-serif;font-size:.82rem;
}
.stats-bar{display:flex;justify-content:center;gap:22px;margin-bottom:10px;flex-wrap:wrap;}
.stat-item{display:flex;flex-direction:column;align-items:center;}
.stat-val{font-family:'Orbitron',monospace;font-size:1.05rem;font-weight:700;color:var(--gold-light);line-height:1;}
.stat-lbl{font-size:.56rem;color:var(--gold-dark);letter-spacing:.12em;text-transform:uppercase;margin-top:2px;}
.message{
  text-align:center;font-family:'Orbitron',monospace;font-size:.65rem;
  min-height:20px;margin-bottom:8px;letter-spacing:.07em;color:var(--gold-light);transition:color .3s;
}
.message.win{color:var(--ok);text-shadow:0 0 14px rgba(80,220,80,.5);}
.message.err{color:var(--err);}
.message.info{color:var(--hint);}
.message.p1{color:var(--p1);}
.message.p2{color:var(--p2);}
.turn-indicator{display:flex;justify-content:center;gap:20px;margin-bottom:10px;}
.turn-card{
  padding:6px 18px;border-radius:8px;text-align:center;
  border:1px solid rgba(138,106,42,.25);background:rgba(0,0,0,.3);transition:all .3s;min-width:90px;
}
.turn-card.active-p1{border-color:var(--p1);background:rgba(232,201,122,.1);box-shadow:0 0 14px rgba(232,201,122,.3);}
.turn-card.active-p2{border-color:var(--p2);background:rgba(96,184,232,.08);box-shadow:0 0 14px rgba(96,184,232,.25);}
.turn-name{font-family:'Orbitron',monospace;font-size:.58rem;letter-spacing:.1em;text-transform:uppercase;}
.turn-name.p1c{color:var(--p1);}
.turn-name.p2c{color:var(--p2);}
.turn-lives{font-family:'Orbitron',monospace;font-size:1rem;font-weight:900;color:var(--gold-light);}
.canvas-wrap{
  position:relative;width:100%;border-radius:12px;overflow:hidden;
  background:rgba(0,0,0,.35);border:1px solid rgba(138,106,42,.22);margin-bottom:10px;
  cursor:crosshair;
}
canvas{display:block;width:100%;touch-action:none;}
.controls{display:flex;gap:7px;justify-content:center;flex-wrap:wrap;}
button{
  font-family:'Orbitron',monospace;font-size:.58rem;font-weight:700;
  letter-spacing:.08em;padding:8px 14px;border-radius:7px;
  border:none;cursor:pointer;text-transform:uppercase;transition:all .2s;
}
#btn-new{background:linear-gradient(135deg,var(--gold),var(--gold-dark));color:#1a1005;box-shadow:0 3px 12px rgba(201,168,76,.3);}
#btn-new:hover{box-shadow:0 3px 22px rgba(201,168,76,.55);transform:translateY(-1px);}
#btn-undo{background:rgba(255,255,255,.06);color:var(--gold-dark);border:1px solid var(--gold-dark);}
#btn-undo:hover:not(:disabled){background:rgba(255,255,255,.13);color:var(--gold-light);}
#btn-undo:disabled{opacity:.3;cursor:not-allowed;}
.theory-block{margin-bottom:11px;padding-bottom:11px;border-bottom:1px solid rgba(138,106,42,.18);}
.theory-block:last-child{margin-bottom:0;padding-bottom:0;border-bottom:none;}
.theory-title{font-family:'Orbitron',monospace;font-size:.56rem;color:var(--gold);letter-spacing:.1em;margin-bottom:6px;text-transform:uppercase;}
.theory-text{font-size:.72rem;color:rgba(200,180,120,.85);line-height:1.65;}
.theory-text em{color:var(--gold-light);font-style:normal;}
.bounds-display{
  background:rgba(0,0,0,.4);border:1px solid rgba(96,184,232,.22);
  border-radius:8px;padding:9px 11px;
}
.bounds-row{display:flex;justify-content:space-between;margin-bottom:4px;font-size:.69rem;}
.bounds-row:last-child{margin-bottom:0;}
.bv-lbl{color:var(--gold-dark);}
.bv-val{font-family:'Orbitron',monospace;font-weight:700;color:var(--gold-light);}
.bv-val.accent{color:var(--hint);}
.win-overlay{position:fixed;inset:0;background:rgba(0,0,0,.85);display:flex;align-items:center;justify-content:center;z-index:100;opacity:0;pointer-events:none;transition:opacity .5s;}
.win-overlay.show{opacity:1;pointer-events:all;}
.win-box{background:linear-gradient(160deg,#3d2c0e,#251a06);border:2px solid var(--gold);border-radius:20px;padding:30px 44px;text-align:center;max-width:360px;box-shadow:0 0 70px var(--gold-glow);}
.win-trophy{font-size:3rem;display:block;margin-bottom:10px;animation:pulse 1.2s ease-in-out infinite;}
@keyframes pulse{0%,100%{transform:scale(1);}50%{transform:scale(1.12);}}
.win-title{font-family:'Orbitron',monospace;font-weight:900;font-size:1.3rem;color:var(--gold-light);text-shadow:0 0 20px var(--gold-glow);margin-bottom:6px;}
.win-sub{font-size:.82rem;color:var(--gold-dark);margin-bottom:18px;line-height:1.8;}
.win-sub strong{color:var(--gold-light);}
.win-btn{font-family:'Orbitron',monospace;font-size:.68rem;font-weight:700;padding:11px 26px;border-radius:10px;border:none;background:linear-gradient(135deg,var(--gold),var(--gold-dark));color:#1a1005;cursor:pointer;letter-spacing:.1em;box-shadow:0 4px 18px rgba(201,168,76,.35);transition:all .2s;}
.win-btn:hover{transform:translateY(-2px);box-shadow:0 6px 28px rgba(201,168,76,.5);}
.particle{position:fixed;pointer-events:none;z-index:99;border-radius:50%;animation:pfall 1.9s ease-in forwards;}
@keyframes pfall{0%{transform:translateY(-30px) rotate(0deg);opacity:1;}100%{transform:translateY(105vh) rotate(720deg);opacity:0;}}

/* ─── INFO PAGES (Como jugar, Estrategias, Teoría) ─────────────── */
.info-page{
  background:var(--panel-bg); border:2px solid var(--panel-b); border-radius:18px;
  padding:30px 36px;
  box-shadow:0 0 50px rgba(201,168,76,.1),inset 0 0 40px rgba(0,0,0,.5);
  user-select:text;
}
.info-page h2{
  font-family:'Orbitron',monospace; font-size:1rem; font-weight:900;
  color:var(--gold-light); letter-spacing:.15em; text-transform:uppercase;
  margin-bottom:22px; text-align:center;
  text-shadow:0 0 20px var(--gold-glow);
}
.info-page h3{
  font-family:'Orbitron',monospace; font-size:.7rem; font-weight:700;
  color:var(--gold); letter-spacing:.1em; text-transform:uppercase;
  margin:22px 0 10px; border-left:3px solid var(--gold-dark); padding-left:10px;
}
.info-page p{
  font-size:.85rem; color:rgba(220,195,140,.88); line-height:1.8; margin-bottom:12px;
}
.info-page em{color:var(--gold-light);font-style:normal;font-weight:600;}
.info-page strong{color:var(--hint);}

.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;margin:18px 0;}
.info-card{
  background:rgba(0,0,0,.35); border:1px solid rgba(138,106,42,.28); border-radius:12px;
  padding:16px 18px;
}
.info-card .card-icon{font-size:1.6rem;margin-bottom:8px;display:block;}
.info-card h4{font-family:'Orbitron',monospace;font-size:.62rem;color:var(--gold);letter-spacing:.1em;text-transform:uppercase;margin-bottom:7px;}
.info-card p{font-size:.78rem;line-height:1.7;margin:0;}

/* Example visual */
.example-visual{
  background:rgba(0,0,0,.45); border:1px solid rgba(96,184,232,.2); border-radius:14px;
  padding:18px; margin:18px 0; text-align:center;
}
.ex-canvas-wrap{display:inline-block;position:relative;}
.example-visual canvas{border-radius:8px;background:rgba(0,0,0,.3);}
.example-visual .ex-caption{
  font-family:'Orbitron',monospace; font-size:.55rem; color:var(--gold-dark);
  letter-spacing:.1em; margin-top:8px; text-transform:uppercase;
}
.ex-steps{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:12px;}
.ex-step-btn{
  font-family:'Orbitron',monospace;font-size:.52rem;padding:5px 12px;
  border-radius:6px;border:1px solid var(--gold-dark);background:rgba(201,168,76,.1);
  color:var(--gold);cursor:pointer;transition:all .2s;letter-spacing:.06em;
}
.ex-step-btn:hover,.ex-step-btn.active{background:rgba(201,168,76,.25);border-color:var(--gold);}

/* Math boxes */
.math-box{
  background:rgba(0,0,0,.4);border:1px solid rgba(96,184,232,.25);border-radius:10px;
  padding:14px 18px;margin:14px 0;text-align:center;
}
.math-box .MJXc-display,.math-box .mjx-container{color:var(--gold-light)!important;}

/* Strategy cards */
.strat-card{
  background:rgba(0,0,0,.35);border:1px solid rgba(138,106,42,.3);border-radius:12px;
  padding:14px 16px;margin-bottom:12px;
}
.strat-card .strat-head{
  display:flex;align-items:center;gap:10px;margin-bottom:8px;
}
.strat-card .strat-icon{font-size:1.3rem;}
.strat-card .strat-title{font-family:'Orbitron',monospace;font-size:.65rem;color:var(--gold-light);letter-spacing:.08em;text-transform:uppercase;}
.strat-card .strat-badge{
  margin-left:auto;font-family:'Orbitron',monospace;font-size:.48rem;
  padding:2px 8px;border-radius:4px;letter-spacing:.06em;text-transform:uppercase;
}
.strat-card .strat-badge.adv{background:rgba(96,216,112,.15);border:1px solid rgba(96,216,112,.4);color:var(--ok);}
.strat-card .strat-badge.atk{background:rgba(232,80,80,.1);border:1px solid rgba(232,80,80,.3);color:var(--err);}
.strat-card .strat-badge.def{background:rgba(96,184,232,.1);border:1px solid rgba(96,184,232,.3);color:var(--hint);}
.strat-card p{font-size:.78rem;color:rgba(200,180,120,.85);line-height:1.75;margin:0;}

/* Parity table */
.parity-table{
  width:100%;border-collapse:collapse;font-size:.75rem;margin:12px 0;
}
.parity-table th{
  font-family:'Orbitron',monospace;font-size:.52rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--gold-dark);padding:7px 10px;border-bottom:1px solid rgba(138,106,42,.3);text-align:center;
}
.parity-table td{
  padding:6px 10px;border-bottom:1px solid rgba(138,106,42,.12);text-align:center;
  color:rgba(200,180,120,.85);
}
.parity-table td.win1{color:var(--p1);font-weight:700;}
.parity-table td.win2{color:var(--p2);font-weight:700;}
.parity-table td.mono{font-family:'Orbitron',monospace;font-size:.68rem;}

.divider{height:1px;background:linear-gradient(90deg,transparent,rgba(138,106,42,.3),transparent);margin:22px 0;}

@media(max-width:820px){
  .main-layout{flex-direction:column;align-items:center;}
  .side-col{flex:none;width:100%;max-width:480px;flex-direction:row;flex-wrap:wrap;}
  .side-panel{flex:1 1 210px;}
  .info-page{padding:20px 16px;}
}