/* ── Reset ────────────────────────────────────────────────────────────────── */
*{margin:0;padding:0;box-sizing:border-box;}
:root{
  --green:#7dc832;--green-dim:#4a7a1e;--green-glow:rgba(125,200,50,0.25);
  --red:#e03232;--red-glow:rgba(224,50,50,0.25);
  --orange:#dc8c28;--yellow:#f0d040;
  --bg:#04060c;--panel:rgba(6,12,6,0.96);
  --border:rgba(125,200,50,0.18);--text:#c0d0b8;--white:#eef4ee;
  --font:'Courier New',monospace;
}
body{background:var(--bg);color:var(--white);font-family:var(--font);overflow:hidden;user-select:none;}

/* ── Menu wrapper ─────────────────────────────────────────────────────────── */
#menu{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;z-index:100;}
#menu-bg{position:absolute;inset:0;width:100%;height:100%;}
#menu-content{
  position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;
  width:100%;max-height:100vh;overflow-y:auto;padding:16px 0 40px;
  scrollbar-width:thin;scrollbar-color:var(--green-dim) transparent;
}

/* ── Title ────────────────────────────────────────────────────────────────── */
#title-block{text-align:center;margin-bottom:32px;}
#title-biohazard{
  font-size:5.5rem;color:var(--green);display:block;line-height:1;
  text-shadow:0 0 20px var(--green),0 0 50px var(--green-dim),0 0 90px rgba(125,200,50,0.2);
  animation:pulse 3s ease-in-out infinite;
}
#title-text{
  font-size:clamp(2.4rem,7vw,4.5rem);letter-spacing:12px;margin-top:2px;
  background:linear-gradient(170deg,#ffffff 0%,#c8f080 35%,var(--green) 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  filter:drop-shadow(0 0 16px rgba(125,200,50,0.6));
  font-weight:bold;
}
#title-sub{
  color:rgba(125,200,50,0.5);font-size:.8rem;letter-spacing:5px;margin-top:8px;
  text-transform:uppercase;
}
/* Decorative line under title */
#title-block::after{
  content:'';display:block;width:200px;height:1px;margin:14px auto 0;
  background:linear-gradient(90deg,transparent,var(--green),transparent);
}
@keyframes pulse{
  0%,100%{text-shadow:0 0 20px var(--green),0 0 50px var(--green-dim);}
  50%{text-shadow:0 0 40px var(--green),0 0 90px var(--green),0 0 130px var(--green-dim);}
}

/* ── Screens ──────────────────────────────────────────────────────────────── */
.menu-screen{display:none;flex-direction:column;align-items:center;width:100%;max-width:860px;padding:0 20px;animation:fadeIn .25s cubic-bezier(.22,.68,0,1.2);}
.menu-screen.active{display:flex;}
@keyframes fadeIn{from{opacity:0;transform:translateY(16px) scale(0.98);}to{opacity:1;transform:none;}}
.screen-title{
  color:var(--green);font-size:.95rem;letter-spacing:5px;text-transform:uppercase;
  margin-bottom:22px;padding-bottom:10px;width:100%;text-align:center;
  border-bottom:1px solid var(--border);text-shadow:0 0 10px var(--green);
}

/* ── Main buttons ─────────────────────────────────────────────────────────── */
.mbtn{
  display:flex;align-items:center;gap:14px;
  width:320px;padding:14px 20px;margin:6px auto;
  background:rgba(4,10,4,0.88);
  border:1px solid rgba(125,200,50,0.28);
  border-left:3px solid rgba(125,200,50,0.5);
  color:#c0e090;
  font-family:var(--font);font-size:.92rem;letter-spacing:2px;cursor:pointer;
  transition:background .18s,border-color .18s,color .18s,box-shadow .18s,transform .12s cubic-bezier(.22,.68,0,1.4);
  position:relative;overflow:hidden;
}
.mbtn::before{
  content:'';position:absolute;left:0;top:0;bottom:0;width:0;
  background:linear-gradient(90deg,rgba(125,200,50,0.15),transparent);
  transition:width .22s ease;
}
.mbtn:hover::before{width:100%;}
.mbtn:hover{
  background:rgba(12,28,6,0.96);
  border-color:rgba(125,200,50,0.7);
  border-left-color:var(--green);
  color:#ffffff;
  box-shadow:0 0 20px rgba(125,200,50,0.18),inset 0 0 30px rgba(125,200,50,0.04);
  transform:translateX(5px);
}
.mbtn:active{transform:translateX(3px);}
.mbtn-icon{
  font-size:1.1rem;min-width:22px;text-align:center;
  color:var(--green);opacity:0.8;
  transition:opacity .15s,transform .15s;
}
.mbtn:hover .mbtn-icon{opacity:1;transform:scale(1.15);}
.mbtn-label{flex:1;text-align:left;}
.mbtn.primary{
  border-color:rgba(125,200,50,0.5);border-left-color:var(--green);
  background:rgba(10,26,4,0.95);
  box-shadow:0 0 14px rgba(125,200,50,0.1);
}
.mbtn.danger{border-color:rgba(200,50,50,0.3);border-left-color:rgba(200,50,50,0.5);color:#c08080;}
.mbtn.danger .mbtn-icon{color:var(--red);}
.mbtn.danger:hover{border-color:rgba(224,50,50,0.7);border-left-color:var(--red);color:#fff;box-shadow:0 0 20px rgba(200,50,50,0.2);}
.mbtn.back-btn{
  width:auto;padding:9px 18px;font-size:.78rem;letter-spacing:1px;
  border-color:rgba(255,255,255,0.07);border-left-color:rgba(255,255,255,0.15);
  color:#445544;margin-top:16px;
}
.mbtn.back-btn:hover{color:#aaccaa;border-color:rgba(125,200,50,0.25);transform:translateX(-4px);}
.btn-row{display:flex;gap:12px;justify-content:center;margin-top:16px;flex-wrap:wrap;}

/* ── Slots grid ───────────────────────────────────────────────────────────── */
#slots-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;width:100%;margin-bottom:16px;}
.slot-card{
  background:rgba(4,10,4,0.9);border:1px solid rgba(125,200,50,0.1);
  padding:16px;cursor:pointer;transition:all .18s;position:relative;
  border-left:3px solid transparent;
}
.slot-card:hover{border-color:rgba(125,200,50,0.45);border-left-color:var(--green);background:rgba(12,28,8,0.98);box-shadow:0 0 14px rgba(125,200,50,0.12);}
.slot-card.empty{border-style:dashed;border-color:rgba(125,200,50,0.07);border-left-style:dashed;}
.slot-card.empty:hover{border-color:rgba(125,200,50,0.3);border-left-color:rgba(125,200,50,0.3);}
.slot-num{font-size:.65rem;color:rgba(125,200,50,0.35);margin-bottom:6px;letter-spacing:3px;}
.slot-name{font-size:1rem;color:var(--white);margin-bottom:4px;font-weight:bold;}
.slot-info{font-size:.7rem;color:#4a6040;line-height:1.7;}
.slot-diff{display:inline-block;padding:2px 8px;font-size:.65rem;margin-top:6px;border:1px solid;letter-spacing:1px;text-transform:uppercase;}
.slot-diff.easy{color:#50e850;border-color:rgba(80,232,80,0.35);}
.slot-diff.normal{color:var(--orange);border-color:rgba(220,140,40,0.35);}
.slot-diff.hardcore{color:var(--red);border-color:rgba(224,50,50,0.35);}
.slot-del{
  position:absolute;top:8px;right:8px;background:none;border:1px solid transparent;
  color:rgba(255,255,255,0.12);cursor:pointer;font-size:.85rem;padding:3px 7px;
  transition:all .15s;border-radius:2px;
}
.slot-del:hover{color:var(--red);border-color:rgba(224,50,50,0.4);background:rgba(224,50,50,0.08);}

/* ── Two-column form layout ───────────────────────────────────────────────── */
.form-two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px;width:100%;}
@media(max-width:640px){.form-two-col{grid-template-columns:1fr;}}
.form-col{display:flex;flex-direction:column;gap:14px;}
.form-grid{width:100%;display:flex;flex-direction:column;gap:14px;}

/* ── Fields ───────────────────────────────────────────────────────────────── */
.field{display:flex;flex-direction:column;gap:5px;}
.field label{font-size:.68rem;color:rgba(125,200,50,0.55);letter-spacing:2px;text-transform:uppercase;}
.field input,.field select,.styled-select{
  background:rgba(0,6,0,0.8);border:1px solid rgba(125,200,50,0.14);
  color:var(--white);padding:9px 12px;font-family:var(--font);font-size:.88rem;
  outline:none;transition:border-color .15s,box-shadow .15s;width:100%;
}
.field input:focus,.field select:focus,.styled-select:focus{
  border-color:rgba(125,200,50,0.5);box-shadow:0 0 8px rgba(125,200,50,0.08);
}
.field select option,.styled-select option{background:#060e06;}
.hint{color:rgba(255,255,255,0.18);font-size:.65rem;text-transform:none;letter-spacing:0;}

/* ── Difficulty picker ────────────────────────────────────────────────────── */
.diff-picker{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;}
.diff-opt{
  border:1px solid rgba(125,200,50,0.1);padding:10px 6px;cursor:pointer;
  text-align:center;transition:all .16s;background:rgba(0,6,0,0.6);
  display:flex;flex-direction:column;align-items:center;gap:3px;
}
.diff-opt:hover{border-color:rgba(125,200,50,0.3);background:rgba(8,20,4,0.9);}
.diff-opt.active{border-color:var(--green);background:rgba(15,40,5,0.95);box-shadow:0 0 10px rgba(125,200,50,0.15);}
.diff-opt.hardcore.active{border-color:var(--red);background:rgba(35,5,5,0.95);box-shadow:0 0 10px var(--red-glow);}
.diff-icon{font-size:1.2rem;}
.diff-name{display:block;font-size:.78rem;color:var(--white);letter-spacing:1px;}
.diff-desc{display:block;font-size:.6rem;color:#4a6040;line-height:1.4;}

/* ── World preview ────────────────────────────────────────────────────────── */
.world-preview{
  background:rgba(0,6,0,0.7);border:1px solid rgba(125,200,50,0.12);
  padding:12px;display:flex;flex-direction:column;align-items:center;gap:8px;
}
.wp-title{font-size:.65rem;color:rgba(125,200,50,0.4);letter-spacing:3px;}
#seed-preview{border:1px solid rgba(125,200,50,0.1);image-rendering:pixelated;}
.wp-info{font-size:.68rem;color:#4a6040;text-align:center;}

/* ── Tabs ─────────────────────────────────────────────────────────────────── */
.tabs{display:flex;margin-bottom:8px;}
.tab{
  flex:1;padding:8px;text-align:center;cursor:pointer;
  border:1px solid rgba(125,200,50,0.1);color:#3a5030;
  font-size:.78rem;transition:all .14s;letter-spacing:1px;
}
.tab:hover{color:#7a9a70;border-color:rgba(125,200,50,0.22);}
.tab.active{border-color:rgba(125,200,50,0.5);color:var(--green);background:rgba(10,28,5,0.8);}

/* ── Info box ─────────────────────────────────────────────────────────────── */
.info-box{
  background:rgba(0,8,0,0.6);border:1px solid rgba(125,200,50,0.1);
  padding:10px 12px;font-size:.75rem;color:#5a7a50;line-height:1.8;
}
.info-box b{color:var(--green);}

/* ── How to play ──────────────────────────────────────────────────────────── */
.howto-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px;width:100%;margin-bottom:16px;}
.howto-card{background:rgba(4,10,4,0.9);border:1px solid rgba(125,200,50,0.1);padding:14px;border-left:2px solid rgba(125,200,50,0.3);}
.howto-card h3{color:var(--green);font-size:.82rem;margin-bottom:10px;letter-spacing:2px;}
.ctrl-table{width:100%;border-collapse:collapse;font-size:.75rem;}
.ctrl-table td{padding:3px 5px;color:#7a9a70;}
.ctrl-table td:first-child{color:var(--green);white-space:nowrap;min-width:80px;}
.prog-chain{display:flex;flex-wrap:wrap;gap:3px;align-items:center;font-size:.72rem;margin-bottom:6px;color:#7a9a70;}
.prog-chain .arr{color:#2a4020;}
.prog-chain .gun{color:var(--orange);}
.tip{font-size:.74rem;color:#5a7a50;line-height:1.8;}
.tip b{color:#8aaa80;}

/* ── Settings ─────────────────────────────────────────────────────────────── */
.settings-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:16px;width:100%;margin-bottom:16px;
}
.settings-section{
  background:rgba(4,10,4,0.92);border:1px solid rgba(125,200,50,0.12);
  padding:18px 16px;display:flex;flex-direction:column;gap:16px;
}
.settings-section-title{
  font-size:.65rem;color:rgba(125,200,50,0.55);letter-spacing:4px;
  border-bottom:1px solid rgba(125,200,50,0.1);padding-bottom:8px;
  text-transform:uppercase;
}
.setting-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:28px;
}
.setting-label{font-size:.8rem;color:#8aaa80;white-space:nowrap;flex-shrink:0;}

/* ── Styled slider ────────────────────────────────────────────────────────── */
.slider-wrap{display:flex;align-items:center;gap:10px;flex:1;min-width:0;}
.styled-slider{
  -webkit-appearance:none;appearance:none;
  flex:1;height:3px;outline:none;cursor:pointer;border:none;
  background:rgba(125,200,50,0.15);
  border-radius:0;
}
/* Webkit thumb */
.styled-slider::-webkit-slider-thumb{
  -webkit-appearance:none;appearance:none;
  width:16px;height:16px;
  background:var(--green);cursor:pointer;
  border:2px solid rgba(0,0,0,0.6);
  box-shadow:0 0 8px rgba(125,200,50,0.6);
  /* Diamond shape */
  transform:rotate(45deg);
  border-radius:0;
}
.styled-slider:hover::-webkit-slider-thumb{
  box-shadow:0 0 14px rgba(125,200,50,0.9);
}
/* Firefox thumb */
.styled-slider::-moz-range-thumb{
  width:14px;height:14px;
  background:var(--green);cursor:pointer;
  border:2px solid rgba(0,0,0,0.6);
  border-radius:0;
  box-shadow:0 0 8px rgba(125,200,50,0.6);
  transform:rotate(45deg);
}
/* Firefox track */
.styled-slider::-moz-range-track{
  height:3px;background:rgba(125,200,50,0.15);border:none;
}
.styled-slider::-moz-range-progress{
  height:3px;background:rgba(125,200,50,0.5);
}
.slider-val{
  font-size:.78rem;color:var(--green);
  min-width:36px;text-align:right;flex-shrink:0;
  font-family:var(--font);
}

/* ── Toggle switch ────────────────────────────────────────────────────────── */
.toggle-switch{position:relative;display:inline-block;cursor:pointer;flex-shrink:0;}
.toggle-switch input{opacity:0;width:0;height:0;position:absolute;}
.toggle-track{
  display:block;width:44px;height:22px;
  background:rgba(125,200,50,0.08);
  border:1px solid rgba(125,200,50,0.2);
  transition:all .2s;position:relative;
}
.toggle-thumb{
  position:absolute;top:3px;left:3px;
  width:14px;height:14px;
  background:#334433;transition:all .2s;
}
.toggle-switch input:checked + .toggle-track{
  background:rgba(125,200,50,0.2);
  border-color:rgba(125,200,50,0.6);
}
.toggle-switch input:checked + .toggle-track .toggle-thumb{
  left:25px;background:var(--green);
  box-shadow:0 0 8px rgba(125,200,50,0.8);
}

/* ── Confirm delete dialog ────────────────────────────────────────────────── */
#confirm-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,0.75);
  display:flex;align-items:center;justify-content:center;z-index:500;
  animation:fadeIn .15s ease;
}
#confirm-dialog{
  background:#060e06;border:1px solid rgba(224,50,50,0.5);
  padding:32px 40px;min-width:320px;max-width:420px;text-align:center;
  box-shadow:0 0 40px rgba(224,50,50,0.2),0 0 80px rgba(0,0,0,0.8);
  animation:fadeIn .15s ease;
}
#confirm-icon{font-size:2.5rem;margin-bottom:12px;}
#confirm-title{color:var(--red);font-size:1.1rem;letter-spacing:4px;margin-bottom:10px;}
#confirm-body{color:#7a5050;font-size:.82rem;line-height:1.7;margin-bottom:24px;}
.confirm-btns{display:flex;gap:12px;justify-content:center;}
.cbtn{
  padding:10px 28px;font-family:var(--font);font-size:.85rem;
  letter-spacing:2px;cursor:pointer;border:1px solid;transition:all .15s;
  background:transparent;
}
.cbtn-danger{color:var(--red);border-color:rgba(224,50,50,0.5);}
.cbtn-danger:hover{background:rgba(224,50,50,0.15);box-shadow:0 0 12px var(--red-glow);}
.cbtn-cancel{color:#7a9a70;border-color:rgba(125,200,50,0.2);}
.cbtn-cancel:hover{background:rgba(125,200,50,0.08);color:var(--green);}

/* ── Loading screen ───────────────────────────────────────────────────────── */
#loading{position:fixed;inset:0;background:var(--bg);display:flex;align-items:center;justify-content:center;z-index:200;}
#loading-inner{text-align:center;display:flex;flex-direction:column;align-items:center;gap:16px;}
#loading-biohazard{font-size:4.5rem;color:var(--green);animation:spin 2s linear infinite;text-shadow:0 0 25px var(--green);}
@keyframes spin{to{transform:rotate(360deg);}}
#loading-text{color:var(--green);font-size:.95rem;letter-spacing:3px;text-shadow:0 0 8px var(--green);}
#loading-bar-wrap{width:300px;height:3px;background:rgba(125,200,50,0.1);border:1px solid rgba(125,200,50,0.15);}
#loading-bar{height:100%;background:var(--green);width:0%;transition:width .3s;box-shadow:0 0 8px var(--green);}
#loading-tip{color:#3a5030;font-size:.74rem;max-width:300px;text-align:center;line-height:1.7;font-style:italic;}

/* ── Room code toast ──────────────────────────────────────────────────────── */
#room-toast{
  position:fixed;top:12px;left:50%;transform:translateX(-50%);
  background:rgba(2,6,2,0.97);border:1px solid var(--green);
  padding:10px 22px;z-index:999;font-size:.9rem;color:var(--green);
  display:flex;align-items:center;gap:14px;
  box-shadow:0 0 24px rgba(125,200,50,0.2);
}
#room-code-val{font-size:1.5rem;letter-spacing:8px;font-weight:bold;text-shadow:0 0 8px var(--green);}
#room-toast button{
  background:none;border:1px solid rgba(125,200,50,0.2);color:#4a6a40;
  cursor:pointer;padding:3px 8px;font-family:var(--font);font-size:.8rem;transition:all .14s;
}
#room-toast button:hover{color:var(--white);border-color:rgba(125,200,50,0.5);}

/* ── Game canvas ──────────────────────────────────────────────────────────── */
#canvas{display:block;position:fixed;inset:0;}

/* ── Chat input ───────────────────────────────────────────────────────────── */
#chat-input-wrap{position:fixed;bottom:80px;left:10px;z-index:50;}
#chat-input-label{font-size:.6rem;color:rgba(125,200,50,0.4);letter-spacing:3px;margin-bottom:3px;}
#chat-input{
  background:rgba(0,0,0,0.92);border:1px solid rgba(125,200,50,0.35);
  color:#fff;padding:8px 12px;font-family:var(--font);font-size:.88rem;
  width:340px;outline:none;box-shadow:0 0 8px rgba(125,200,50,0.08);
  display:block;
}

/* ── Utility ──────────────────────────────────────────────────────────────── */
.hidden{display:none!important;}
.pvp-row{display:flex;align-items:center;gap:12px;}
.pvp-label{font-size:.72rem;color:#4a6a40;line-height:1.5;}