:root{
  /* driller's cabin: graphite steel panels, rig safety yellow */
  --bg:#14171a;--bg2:#1b1f23;--bg3:#22272c;--bg4:#2a3036;
  --border:#363d44;--text1:#e8ebee;--text2:#a3acb5;--text3:#76808a;
  --gold:#f2b705;--red:#e5533d;--grn:#4fb37a;--blue:#4aa3c7;--orange:#e08a1e;
  --cyan:#3fbfb2;--purple:#9d7be0;
  --ui:'Barlow',system-ui,sans-serif;
  --num:'Barlow Semi Condensed','Barlow',system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--ui);background:var(--bg);color:var(--text1);
  height:100vh;display:flex;flex-direction:column;overflow:hidden;font-size:12px}

/* ═══ HEADER ═══ */
#header{background:var(--bg2);border-bottom:1px solid var(--border);
  padding:0 12px;height:44px;display:flex;align-items:center;gap:10px;flex-shrink:0}
#header .logo{font-size:16px;font-weight:700;color:var(--text1);white-space:nowrap;
  display:flex;align-items:center;gap:8px}
.logo-mark{width:18px;height:18px;border-radius:3px;flex-shrink:0;
  background:repeating-linear-gradient(-45deg,var(--gold) 0 4px,#111 4px 8px)}
.mode-btn{padding:5px 14px;border:1px solid var(--border);border-radius:5px;
  background:var(--bg3);color:var(--text2);cursor:pointer;font-size:11px;
  font-weight:600;letter-spacing:.3px;transition:all .15s}
.mode-btn:hover{border-color:var(--gold);color:var(--text1)}
.mode-btn.active{background:var(--gold);color:#000;border-color:var(--gold)}
.mode-btn.warn{border-color:var(--orange)}
.mode-btn.warn.on{background:var(--orange);color:#000}
#run-btn{margin-left:auto;padding:6px 18px;border-radius:6px;border:none;
  background:var(--grn);color:#000;font-weight:700;font-size:12px;cursor:pointer;
  transition:all .15s;white-space:nowrap}
#run-btn:hover{filter:brightness(1.15)}
#run-btn.running{background:var(--red);color:#fff}
#sim-time{font-family:var(--num);font-size:13px;font-weight:500;color:var(--text2);white-space:nowrap;
  font-variant-numeric:tabular-nums}
.hdr-sel{background:var(--bg3);border:1px solid var(--border);color:var(--text2);
  padding:4px 6px;border-radius:4px;font-size:11px;font-weight:600;cursor:pointer}

/* ═══ MAIN LAYOUT ═══ */
#main{flex:1;display:grid;grid-template-columns:272px 1fr 272px;
  grid-template-rows:1fr;gap:0;overflow:hidden}

/* ═══ LEFT PANEL ═══ */
#left-panel{background:var(--bg2);border-right:1px solid var(--border);
  display:flex;flex-direction:column;overflow:hidden}
.panel-tab-bar{display:flex;border-bottom:1px solid var(--border);flex-shrink:0}
.panel-tab{flex:1;padding:7px 4px;text-align:center;font-size:10px;font-weight:600;
  color:var(--text3);cursor:pointer;border-bottom:2px solid transparent;
  transition:all .15s;letter-spacing:.3px}
.panel-tab:hover{color:var(--text2)}
.panel-tab.on{color:var(--gold);border-bottom-color:var(--gold)}
.panel-body{flex:1;overflow-y:auto;padding:10px 8px}
.panel-body::-webkit-scrollbar{width:4px}
.panel-body::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}

/* Sliders */
.ctrl-group{margin-bottom:10px;background:var(--bg3);border-radius:6px;padding:8px}
.ctrl-group-title{font-size:12px;font-weight:600;color:var(--text2);margin-bottom:7px}
.ctrl-row{display:flex;align-items:center;gap:6px;margin-bottom:6px}
.ctrl-row:last-child{margin-bottom:0}
.ctrl-lbl{font-size:10px;color:var(--text2);width:64px;flex-shrink:0;line-height:1.2}
.ctrl-slider{flex:1;-webkit-appearance:none;height:4px;border-radius:2px;
  background:var(--border);outline:none;cursor:pointer}
.ctrl-slider::-webkit-slider-thumb{-webkit-appearance:none;width:12px;height:12px;
  border-radius:50%;background:var(--gold);cursor:pointer}
.ctrl-val{font-family:var(--num);font-size:12px;color:var(--gold);width:40px;text-align:right;font-weight:600;
  font-variant-numeric:tabular-nums}
.ctrl-unit{font-size:9px;color:var(--text3);width:24px;text-align:left}
.chk-row{display:flex;align-items:center;gap:6px;font-size:10px;color:var(--text2);margin-bottom:5px;cursor:pointer}
.chk-row input{accent-color:var(--gold)}

/* Formation table */
.form-tbl{width:100%;border-collapse:collapse;font-size:9px}
.form-tbl th{background:var(--bg4);color:var(--text3);padding:3px 3px;
  text-align:left;border-bottom:1px solid var(--border);font-size:8px}
.form-tbl td{padding:2px 2px;border-bottom:1px solid var(--border);vertical-align:middle}
.form-tbl tr:hover td{background:var(--bg4)}
.rock-color{display:inline-block;width:9px;height:9px;border-radius:2px;margin-right:2px;vertical-align:middle}
.tbl-inp{background:var(--bg);border:1px solid var(--border);color:var(--text1);
  padding:2px 2px;border-radius:3px;width:40px;font-size:9px}
.tbl-inp.narrow{width:32px}
/* formation table: numbers must be fully readable */
.form-tbl .tbl-inp{font-family:var(--num);font-size:12px;font-weight:600;padding:3px 4px;
  font-variant-numeric:tabular-nums;-moz-appearance:textfield;appearance:textfield}
.form-tbl .tbl-inp::-webkit-inner-spin-button,.form-tbl .tbl-inp::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
.form-tbl td{padding:2px 1px;white-space:nowrap}
.form-tbl .tbl-inp.depth{width:46px;color:var(--gold)}
.form-tbl .tbl-inp.ucs{width:42px}
.form-tbl .tbl-inp.ppg{width:32px}
.form-tbl .tbl-sel{font-size:11px;width:68px;border-left-width:4px}
.form-tbl th{font-size:10px}
.tbl-sel{background:var(--bg);border:1px solid var(--border);color:var(--text1);
  padding:2px 1px;border-radius:3px;font-size:9px;width:68px}
.icon-btn{background:none;border:none;cursor:pointer;padding:1px 2px;border-radius:3px;
  font-size:10px;transition:background .1s}
.icon-btn:hover{background:var(--bg4)}
.add-btn{width:100%;margin-top:6px;padding:5px;background:var(--bg3);
  border:1px dashed var(--border);color:var(--text3);border-radius:5px;
  cursor:pointer;font-size:10px;transition:all .15s}
.add-btn:hover{border-color:var(--gold);color:var(--gold)}
.add-btn:disabled{opacity:.35;cursor:not-allowed}

/* BHA */
.bha-item{display:flex;align-items:center;gap:6px;padding:5px 6px;
  background:var(--bg3);border-radius:5px;margin-bottom:4px}
.bha-thumb{display:block;flex-shrink:0;border-radius:2px;background:#101316}
.bha-name{flex:1;font-size:10px;color:var(--text1)}
.bha-spec{font-size:9px;color:var(--text3)}

/* ═══ CENTER CANVAS ═══ */
#center{display:flex;flex-direction:column;overflow:hidden;position:relative}
#canvas-wrap{flex:1;display:flex;align-items:stretch;position:relative;overflow:hidden}
#well-canvas{display:block}
#depth-scale{width:44px;background:var(--bg2);border-right:1px solid var(--border);
  flex-shrink:0;position:relative;overflow:hidden}

/* Bottom strip */
#bottom-strip{background:var(--bg2);border-top:1px solid var(--border);
  height:28px;display:flex;align-items:center;padding:0 10px;gap:12px;flex-shrink:0}
.bs-item{display:flex;align-items:center;gap:5px;font-size:10px}
.bs-dot{width:7px;height:7px;border-radius:50%;flex-shrink:0}
.bs-lbl{color:var(--text3)}
.bs-val{color:var(--text1);font-weight:600;font-family:var(--num);font-size:11px;font-variant-numeric:tabular-nums}

/* ═══ RIGHT PANEL ═══ */
#right-panel{background:var(--bg2);border-left:1px solid var(--border);
  display:flex;flex-direction:column;overflow-y:auto;padding:8px}
#right-panel::-webkit-scrollbar{width:4px}
#right-panel::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}

.gauge-wrap{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-bottom:6px}
.gauge-card{background:var(--bg3);border-radius:8px;padding:8px;
  display:flex;flex-direction:column;align-items:center;border:1px solid var(--border)}
.gauge-card.full{grid-column:1/-1}
.gauge-title{font-size:11px;color:var(--text2);font-weight:600;margin-bottom:4px}
.gauge-num{font-family:var(--num);font-size:22px;font-weight:700;color:var(--gold);line-height:1;
  font-variant-numeric:tabular-nums}
.gauge-unit{font-size:9px;color:var(--text3);margin-top:1px}
.gauge-canvas{display:block}

/* Bar gauge */
.bar-gauge{width:100%;height:8px;background:var(--bg4);border-radius:4px;overflow:hidden;margin-top:4px}
.bar-fill{height:100%;border-radius:4px;transition:width .3s}
.bar-fill.grn{background:var(--grn)}
.bar-fill.gold{background:var(--gold)}
.bar-fill.red{background:var(--red)}
.bar-fill.blue{background:var(--blue)}
.bar-fill.orange{background:var(--orange)}

.spark{width:100%;height:28px;margin-top:2px}

/* Small key-value grid inside cards */
.kv-grid{display:grid;grid-template-columns:1fr 1fr;gap:2px 8px;width:100%;font-size:10px}
.kv{display:flex;justify-content:space-between}
.kv .k{color:var(--text3)}
.kv .v{color:var(--text1);font-weight:600;font-family:var(--num);font-variant-numeric:tabular-nums}

/* Flags */
.flag-row{display:flex;gap:4px;width:100%;margin-top:5px;flex-wrap:wrap}
.flag{font-size:8px;font-weight:700;padding:2px 6px;border-radius:3px;
  background:var(--bg4);color:var(--text3);letter-spacing:.4px}
.flag.warn{background:rgba(210,153,34,.25);color:#ffcc44}
.flag.danger{background:rgba(248,81,73,.3);color:#ff9090;animation:pulse 1s infinite}

/* Alarm panel */
.alarm-card{background:var(--bg3);border:1px solid var(--border);border-radius:8px;
  padding:8px;margin-bottom:6px}
.alarm-item{font-size:10px;padding:3px 6px;border-radius:4px;margin-bottom:3px;font-weight:600}
.alarm-item.danger{background:rgba(248,81,73,.18);color:#ff9090;border-left:3px solid var(--red)}
.alarm-item.warn{background:rgba(210,153,34,.14);color:#ffcc44;border-left:3px solid var(--orange)}
.alarm-item.ok{color:var(--grn);font-weight:400}
.act-btn{width:100%;margin-top:4px;padding:6px;border:none;border-radius:5px;
  font-size:10px;font-weight:700;cursor:pointer;letter-spacing:.3px}
.act-btn.jar{background:var(--orange);color:#000}
.act-btn.lcm{background:#8a6d3b;color:#fff}

/* Event log */
.evt-log{background:var(--bg3);border-radius:6px;padding:6px;margin-top:6px;
  max-height:150px;overflow-y:auto;border:1px solid var(--border)}
.evt-log::-webkit-scrollbar{width:3px}
.evt-log::-webkit-scrollbar-thumb{background:var(--border)}
.evt-item{font-size:9px;padding:2px 0;border-bottom:1px solid var(--border);display:flex;gap:5px}
.evt-item:last-child{border-bottom:none}
.evt-time{color:var(--text3);flex-shrink:0;font-family:var(--num);font-variant-numeric:tabular-nums}
.evt-msg{color:var(--text2)}
.evt-msg.warn{color:var(--orange)}
.evt-msg.danger{color:var(--red)}
.evt-msg.ok{color:var(--grn)}

/* Well control panel */
.wc-panel{background:var(--bg3);border:1px solid var(--red);
  border-radius:6px;padding:8px;margin-top:6px}
.wc-title{font-size:10px;font-weight:700;color:var(--red);margin-bottom:6px}
.wc-row{display:flex;justify-content:space-between;align-items:center;
  margin-bottom:4px;font-size:10px}
.wc-lbl{color:var(--text3)}
.wc-val{color:var(--text1);font-weight:600;font-family:var(--num);font-variant-numeric:tabular-nums}
.wc-btn{width:100%;margin-top:6px;padding:6px;border:none;border-radius:5px;
  font-size:10px;font-weight:700;cursor:pointer;letter-spacing:.3px}
.wc-btn.shut-in{background:var(--red);color:#fff}
.wc-btn.circulate{background:var(--blue);color:#fff}
.wc-btn.kill{background:var(--grn);color:#000}
.wc-btn:disabled{opacity:.4;cursor:not-allowed}

/* Banners */
#kick-banner,#loss-banner{display:none;position:absolute;top:0;left:0;right:0;
  text-align:center;padding:6px;font-size:11px;font-weight:700;color:#fff;z-index:20;letter-spacing:.5px}
#kick-banner{background:#f8514966;border-bottom:2px solid var(--red)}
#loss-banner{background:#d2992266;border-bottom:2px solid var(--orange);top:28px}
#kick-banner.on,#loss-banner.on{display:block}

select,input[type=number]{background:var(--bg);border:1px solid var(--border);
  color:var(--text1);padding:3px 6px;border-radius:4px;font-size:10px}
select:focus,input:focus{outline:1px solid var(--gold)}

@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.pulse{animation:pulse 1s ease-in-out infinite}

/* panels: square-ish industrial corners */
.ctrl-group,.alarm-card,.gauge-card,.evt-log,.wc-panel{border-radius:4px}
button,select,input{font-family:inherit}
:focus-visible{outline:2px solid var(--gold);outline-offset:1px}
.panel-tab:focus-visible{outline-offset:-2px}
@media (prefers-reduced-motion:reduce){.pulse,.flag.danger{animation:none}}

/* narrow screens: stack panels, canvas keeps a usable height */
@media (max-width:900px){
  body{height:auto;overflow:auto}
  #header{height:auto;flex-wrap:wrap;padding:8px 16px;row-gap:6px}
  #run-btn{margin-left:0}
  #sim-time{order:9;flex-basis:100%;white-space:normal}
  #bottom-strip{height:auto;flex-wrap:wrap;padding:6px 16px;row-gap:4px}
  #main{display:flex;flex-direction:column;overflow:visible}
  #center{height:78vh;order:-1}
  #left-panel,#right-panel{border:0;border-top:1px solid var(--border);overflow:visible}
  .panel-body{overflow:visible}
}

/* ═══ CONTROL LOCKS ═══ */
fieldset.lockable{border:0;margin:0;padding:0;min-width:0}
fieldset.lockable:disabled{opacity:.42}
fieldset.lockable:disabled *{cursor:not-allowed}
.grp-head{display:flex;justify-content:space-between;align-items:center;gap:8px}
.mini-switch{display:flex;align-items:center;gap:5px;font-size:11px;font-weight:500;color:var(--text2);cursor:pointer}
.mini-switch input{accent-color:var(--gold);margin:0}
.lock-note{display:none;gap:7px;align-items:flex-start;margin:0 0 10px;padding:7px 9px;
  background:var(--bg3);border-left:3px solid var(--gold);border-radius:3px;
  font-size:11px;line-height:1.4;color:var(--text1)}
.lock-note.on{display:flex}
.lock-note::before,.tab-lock{content:'';flex-shrink:0;width:10px;height:12px;background:currentColor;
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 12'%3E%3Cpath d='M2 5V3.5a3 3 0 0 1 6 0V5h1v7H1V5zm1.5 0h3V3.5a1.5 1.5 0 0 0-3 0z'/%3E%3C/svg%3E") center/contain no-repeat;
          mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 12'%3E%3Cpath d='M2 5V3.5a3 3 0 0 1 6 0V5h1v7H1V5zm1.5 0h3V3.5a1.5 1.5 0 0 0-3 0z'/%3E%3C/svg%3E") center/contain no-repeat}
.lock-note::before{color:var(--gold);margin-top:1px}
.tab-lock{display:none;width:8px;height:10px;margin-left:4px;vertical-align:-1px}
.panel-tab.locked .tab-lock{display:inline-block}
#test-btn.on{background:var(--orange);color:#000;border-color:var(--orange)}

/* Drilling parameters as vertical equalizer-style faders */
.fader-bank{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.fader{display:flex;flex-direction:column;align-items:center;gap:4px;background:var(--bg2);border-radius:6px;padding:6px 4px 7px}
.fader .ctrl-val{width:auto;text-align:center;font-size:15px}
.fader .ctrl-lbl{width:auto;text-align:center;font-size:11px;font-weight:600}
.fader .ctrl-unit{width:auto;text-align:center;margin-top:-3px}
.fader .ctrl-slider{flex:none;writing-mode:vertical-lr;direction:rtl;width:44px;height:170px;margin:4px 0;
  background:linear-gradient(90deg,transparent 19px,var(--border) 19px 25px,transparent 25px);border-radius:3px}
.fader .ctrl-slider::-webkit-slider-runnable-track{width:44px;background:transparent}
.fader .ctrl-slider::-webkit-slider-thumb{width:42px;height:24px;border-radius:5px;
  background:linear-gradient(180deg,#f6f8fa 0 45%,var(--gold) 45% 55%,#c9d1d9 55%);border:1px solid #0008;
  box-shadow:0 2px 5px #0009;cursor:grab}
.fader .ctrl-slider:active::-webkit-slider-thumb{cursor:grabbing}
.fader .ctrl-slider::-moz-range-thumb{width:42px;height:24px;border-radius:5px;
  background:linear-gradient(180deg,#f6f8fa 0 45%,var(--gold) 45% 55%,#c9d1d9 55%);border:1px solid #0008;cursor:grab}
.fader .ctrl-slider::-moz-range-track{background:transparent}
.wob-bar{width:100%;height:20px;border-radius:4px;display:flex;align-items:center;justify-content:center;
  font-size:9px;font-weight:800;letter-spacing:.4px;color:#000;transition:background .2s}
.wob-bar.none{visibility:hidden}
.wob-bar.safe{background:var(--grn)}
.wob-bar.risk{background:var(--orange)}
.wob-bar.crit{background:var(--red);color:#fff;animation:wobblink 1s steps(2) infinite}
@keyframes wobblink{50%{opacity:.55}}
@media (prefers-reduced-motion:reduce){.wob-bar.crit{animation:none}}

/* casing size = dropdown, shoe depth = number entry */
.ctrl-field{flex:1;min-width:0;font-size:12px;padding:6px 8px;font-family:var(--num)}
input.ctrl-field{text-align:right}

/* liner */
.liner-note{font-size:10px;line-height:1.35;color:var(--text2);margin-top:2px}
.liner-note.warn{color:var(--orange)}

/* new well */
#well-tag{font-size:11px;font-weight:600;color:var(--text2);max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  padding:2px 9px;border:1px solid var(--border);border-radius:10px}
#well-dlg{margin:auto;border:1px solid var(--border);border-radius:10px;background:var(--bg2);color:var(--text1);padding:0;width:min(780px,94vw);max-height:92vh}
#well-dlg::backdrop{background:rgba(0,0,0,.65)}
#nw-form{display:flex;flex-direction:column;max-height:92vh}
.nw-head{padding:14px 18px;font-size:17px;font-weight:700;border-bottom:1px solid var(--border)}
.nw-body{padding:12px 18px;overflow:auto;display:grid;gap:12px}
.nw-note{font-size:11px;color:var(--text2);line-height:1.45}
.nw-sec{background:var(--bg3);border-radius:8px;padding:10px 12px}
.nw-sec h3{font-size:12px;font-weight:600;margin:0 0 8px;color:var(--text2)}
.nw-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 14px}
.nw-grid3{grid-template-columns:repeat(3,minmax(0,1fr))}
.nw-grid label{display:flex;flex-direction:column;gap:3px;font-size:11px;color:var(--text2)}
.nw-grid input,.nw-grid select{font-size:13px;padding:6px 8px;font-family:var(--num)}
.nw-grid input[type=text]{font-family:var(--ui)}
.nw-hint{font-size:10px;color:var(--text3);line-height:1.4}
#well-dlg .form-tbl .tbl-inp.depth{width:84px}#well-dlg .form-tbl .tbl-inp.ucs{width:84px}#well-dlg .form-tbl .tbl-inp.ppg{width:60px}
#well-dlg .form-tbl .tbl-sel{width:120px;font-size:12px}#well-dlg .form-tbl th{font-size:11px}
.nw-err{background:rgba(229,83,61,.15);border-left:3px solid var(--red);border-radius:4px;padding:8px 10px;font-size:11px;color:#ffb4a8;line-height:1.5}
.nw-err ul{margin:0;padding-left:16px}
.nw-foot{display:flex;gap:8px;justify-content:flex-end;padding:12px 18px;border-top:1px solid var(--border)}
.nw-btn{padding:7px 16px;border-radius:6px;border:1px solid var(--border);background:var(--bg3);color:var(--text1);font-size:12px;font-weight:600;cursor:pointer}
.nw-btn.go{background:var(--gold);border-color:var(--gold);color:#000}
@media(max-width:560px){.nw-grid,.nw-grid3{grid-template-columns:1fr}}

/* prominent NEW WELL button + data-loss warning */
.mode-btn.prime{background:var(--gold);border-color:var(--gold);color:#000;font-weight:800;letter-spacing:.4px;box-shadow:0 0 0 2px rgba(242,183,5,.25)}
.mode-btn.prime:hover{filter:brightness(1.1)}
#nw-warn{margin:auto;border:1px solid var(--red);border-radius:10px;background:var(--bg2);color:var(--text1);padding:0;width:min(520px,92vw)}
#nw-warn::backdrop{background:rgba(0,0,0,.7)}
.nww-head{display:flex;align-items:center;gap:10px;padding:14px 18px;font-size:17px;font-weight:700;border-bottom:1px solid var(--border)}
.nww-icon{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:50%;background:var(--red);color:#fff;font-weight:800;font-size:15px}
.nww-body{padding:14px 18px;font-size:13px;line-height:1.55;color:var(--text2)}
.nww-body b{color:var(--text1)}
.nww-body ul{margin:8px 0 0;padding-left:18px}
.nw-btn.danger{background:var(--red);border-color:var(--red);color:#fff}