@import url('https://fonts.googleapis.com/css2?family=Big+Shoulders+Display:wght@600;700;800&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@500;600&display=swap');

:root{
  --asphalt:#15171A;
  --panel:#1F2226;
  --panel-2:#282C32;
  --chalk:#EFEBDD;
  --chalk-2:#E3DECB;
  --hivis:#A9D2A0;
  --hivis-dim:#7FB574;
  --ember:#FF5A36;
  --gfc-ink:#1E1E1E;
  --ink:#16181B;
  --fog:#9AA0A6;
  --fog-2:#6B7076;
  --line:rgba(255,255,255,0.09);
  --line-chalk:rgba(22,24,27,0.14);
  --font-display:'Big Shoulders Display',sans-serif;
  --font-body:'Inter',system-ui,-apple-system,sans-serif;
  --font-mono:'IBM Plex Mono',monospace;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--asphalt);
  color:var(--chalk);
  font-family:var(--font-body);
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
::selection{background:var(--hivis);color:var(--ink);}
a{color:inherit;}

.wrap{max-width:1180px;margin:0 auto;padding:32px 24px 80px;}

/* ---------- header ---------- */
.head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;flex-wrap:wrap;
  padding-bottom:22px;border-bottom:1px solid var(--line);margin-bottom:28px;
}
.brand{display:flex;align-items:center;gap:18px;}

.gfc-mark{flex:none;line-height:0.78;}
.gfc-mark .letters{
  font-family:var(--font-display);font-weight:800;font-size:34px;letter-spacing:0.01em;
  display:flex;
}
.gfc-mark .letters span{display:inline-block;}
.gfc-mark .g,.gfc-mark .c{color:var(--hivis);}
.gfc-mark .f{color:var(--chalk);}
.gfc-mark .bar{height:3px;background:var(--chalk);margin:5px 0 3px;}
.gfc-mark .sub{
  font-family:var(--font-display);font-weight:700;font-size:11px;letter-spacing:0.16em;
  color:var(--hivis);text-align:left;
}
.brand-divider{width:1px;align-self:stretch;background:var(--line);}

.brand h1{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(30px,4.2vw,44px);
  letter-spacing:0.01em;
  line-height:0.9;
  margin:0;
  color:var(--chalk);
}
.brand h1 span{color:var(--hivis);}
.brand .tag{
  font-size:12px;color:var(--fog);text-transform:uppercase;letter-spacing:0.12em;
  margin-top:4px;
}
.head-note{
  font-size:12.5px;color:var(--fog);max-width:320px;line-height:1.5;
  text-align:right;
}
@media (max-width:640px){.head-note{text-align:left;max-width:100%;}}

/* ---------- setup panel ---------- */
.setup{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:14px;
  padding:22px 24px;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:26px;
  margin-bottom:22px;
}
@media (max-width:820px){.setup{grid-template-columns:1fr;}}
.field-label{
  font-size:11px;text-transform:uppercase;letter-spacing:0.1em;color:var(--fog);
  margin-bottom:10px;display:block;font-weight:600;
}
.duration-row{display:flex;gap:10px;align-items:center;}
.num-input{
  background:var(--asphalt);border:1px solid var(--line);color:var(--chalk);
  font-family:var(--font-mono);font-size:20px;font-weight:600;
  width:66px;padding:8px 6px;border-radius:8px;text-align:center;
}
.num-input:focus{outline:none;border-color:var(--hivis);}
.duration-row span{color:var(--fog-2);font-size:12px;}

.chip-row{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  background:var(--asphalt);border:1px solid var(--line);color:var(--fog);
  font-family:var(--font-mono);font-size:13px;font-weight:600;
  padding:7px 13px;border-radius:20px;cursor:pointer;
  transition:background .15s,color .15s,border-color .15s;
}
.chip:hover{border-color:var(--hivis-dim);color:var(--chalk);}
.chip.active{background:var(--hivis);color:var(--ink);border-color:var(--hivis);}
.chip.custom-chip{display:flex;align-items:center;gap:6px;}
.chip input{
  width:44px;background:transparent;border:none;color:inherit;
  font-family:var(--font-mono);font-size:13px;font-weight:600;text-align:center;
}
.chip input:focus{outline:none;}

.cal-input-row{display:flex;align-items:center;gap:8px;}
.cal-input{
  background:var(--asphalt);border:1px solid var(--line);color:var(--chalk);
  font-family:var(--font-mono);font-size:18px;font-weight:600;
  width:100px;padding:8px 10px;border-radius:8px;
}
.cal-input:focus{outline:none;border-color:var(--hivis);}
.cal-input-row span{font-size:12px;color:var(--fog-2);}

/* ---------- readout ---------- */
.readout{
  display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:16px;margin-bottom:26px;
}
@media (max-width:820px){.readout{grid-template-columns:1fr;}}
.readout-card{
  background:var(--panel);border:1px solid var(--line);border-radius:14px;
  padding:20px 22px;
}
.readout-card.highlight{
  background:linear-gradient(155deg,var(--panel) 0%,#232920 100%);
  border-color:var(--hivis-dim);
}
.readout-label{font-size:11px;text-transform:uppercase;letter-spacing:0.1em;color:var(--fog);font-weight:600;}
.readout-num{
  font-family:var(--font-mono);font-weight:600;font-size:38px;line-height:1.1;
  margin-top:6px;color:var(--chalk);
}
.readout-num small{font-size:16px;color:var(--fog);font-weight:500;}
.readout-card.highlight .readout-num{color:var(--hivis);}
.readout-sub{font-size:12.5px;color:var(--fog);margin-top:6px;}
.readout-sub.over{color:var(--ember);}
.readout-sub.good{color:var(--hivis);}

/* ---------- fuel timeline (signature element) ---------- */
.timeline-block{
  background:var(--panel);border:1px solid var(--line);border-radius:14px;
  padding:22px 24px 18px;margin-bottom:30px;
}
.timeline-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:16px;flex-wrap:wrap;gap:6px;}
.timeline-head h2{
  font-family:var(--font-display);font-weight:700;font-size:20px;margin:0;
  letter-spacing:0.01em;color:var(--chalk);
}
.timeline-head .sub{font-size:12px;color:var(--fog);}
.timeline-drop{position:relative;border-radius:6px;}
.timeline-track{
  position:relative;height:34px;background:var(--asphalt);border-radius:6px;
  overflow:hidden;border:1px solid var(--line);
}
.timeline-fill{
  height:100%;background:linear-gradient(90deg,var(--hivis-dim),var(--hivis));
  width:0%;transition:width .35s ease;
}
.marker-layer{position:absolute;top:0;left:0;right:0;bottom:0;pointer-events:none;}
.drag-ghost{
  position:fixed;top:0;left:0;transform:translate(-50%,-130%);
  background:#8CFF6B;color:#15171A;padding:8px 13px;border-radius:20px;
  display:flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:12px;font-weight:700;
  pointer-events:none;z-index:9999;box-shadow:0 4px 14px rgba(0,0,0,0.45);white-space:nowrap;
}
.drag-ghost .gel-icon{margin:0;}
.fuel-marker{
  pointer-events:auto;position:absolute;top:50%;transform:translate(-50%,-50%);
  cursor:pointer;width:22px;height:22px;border-radius:50%;
  background:#8CFF6B;box-shadow:0 0 0 2px var(--asphalt),0 0 6px rgba(140,255,107,0.6);
  display:flex;align-items:center;justify-content:center;z-index:5;
  font-family:var(--font-mono);font-weight:700;font-size:12px;color:#15171A;
}
.fuel-marker:hover{filter:brightness(1.15);}
.drop-hover{outline:2px dashed #8CFF6B;outline-offset:2px;}
.gel-icon{width:13px;height:17px;vertical-align:-4px;margin-right:5px;display:inline-block;}

/* matched fuel stops */
.matched-title{font-family:var(--font-display);font-weight:700;font-size:15px;color:var(--chalk);margin:16px 0 8px;letter-spacing:0.01em;}
.matched-list{display:flex;flex-direction:column;gap:8px;}
.matched-card{background:var(--panel-2);border-left:3px solid #8CFF6B;border-radius:6px;padding:9px 12px;display:flex;align-items:center;gap:10px;}
.matched-num{
  width:22px;height:22px;border-radius:50%;background:#8CFF6B;color:#15171A;
  font-family:var(--font-mono);font-weight:700;font-size:12px;
  display:flex;align-items:center;justify-content:center;flex:none;
}
.matched-info{flex:1;min-width:0;}
.matched-info .name{font-size:13px;font-weight:600;}
.matched-info .pos{font-size:11px;color:var(--fog-2);margin-top:2px;}
.matched-remove{background:none;border:none;color:var(--fog-2);cursor:pointer;font-size:15px;flex:none;}
.matched-remove:hover{color:var(--ember);}
.timeline-marks{display:flex;position:relative;margin-top:8px;height:34px;}
.tmark{
  flex:1;border-left:1px solid var(--line);position:relative;
  display:flex;flex-direction:column;align-items:flex-start;padding-left:6px;
}
.tmark:first-child{border-left:none;}
.tmark .hr{font-family:var(--font-mono);font-size:11px;color:var(--fog-2);font-weight:600;}
.tmark .goal{font-family:var(--font-mono);font-size:11px;color:var(--fog);margin-top:2px;}

/* ---------- main grid ---------- */
.main-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:22px;align-items:start;}
@media (max-width:900px){.main-grid{grid-template-columns:1fr;}}
.main-grid.plan-route-grid{grid-template-columns:1fr;}

.panel-block{
  background:var(--panel);border:1px solid var(--line);border-radius:14px;
  padding:20px 22px 22px;
}
.panel-block h2{
  font-family:var(--font-display);font-weight:700;font-size:20px;margin:0 0 14px;
  color:var(--chalk);letter-spacing:0.01em;
}

/* library */
.tabs{display:flex;gap:6px;margin-bottom:14px;flex-wrap:wrap;}
.tab{
  font-family:var(--font-mono);font-size:12.5px;font-weight:600;color:var(--fog);
  background:var(--asphalt);border:1px solid var(--line);padding:8px 14px;border-radius:8px;cursor:pointer;
}
.tab.active{background:var(--chalk);color:var(--ink);border-color:var(--chalk);}
.search{
  width:100%;background:var(--asphalt);border:1px solid var(--line);color:var(--chalk);
  padding:10px 12px;border-radius:8px;font-family:var(--font-body);font-size:13.5px;margin-bottom:14px;
}
.search:focus{outline:none;border-color:var(--hivis-dim);}
.search::placeholder{color:var(--fog-2);}

.lib-list{display:flex;flex-direction:column;gap:8px;max-height:520px;overflow-y:auto;padding-right:4px;}
.lib-list.lib-list-wide{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));align-content:start;max-height:460px;}
.lib-list::-webkit-scrollbar{width:6px;}
.lib-list::-webkit-scrollbar-thumb{background:var(--line);border-radius:3px;}

.product-card{
  background:var(--chalk);color:var(--ink);border-radius:10px;
  padding:12px 14px;display:flex;align-items:center;gap:12px;
  border:1px solid var(--line-chalk);
}
.product-info{flex:1;min-width:0;}
.product-name{font-weight:700;font-size:14px;line-height:1.25;}
.product-brand{font-size:11.5px;color:#5A5D62;text-transform:uppercase;letter-spacing:0.05em;margin-top:1px;}
.product-tags{display:flex;gap:6px;margin-top:6px;flex-wrap:wrap;}
.ptag{
  font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:0.04em;
  padding:2px 7px;border-radius:20px;
}
.ptag.tested{background:#DDEFC0;color:#3D5A0E;}
.ptag.partial{background:#F3E7C0;color:#6B540C;}
.ptag.custom{background:#E4D9F2;color:#4A2E70;}
.product-nums{
  font-family:var(--font-mono);text-align:right;flex:none;
}
.product-nums .carbs{font-size:20px;font-weight:600;}
.product-nums .kcal{font-size:11px;color:#6A6D72;}
.add-btn{
  width:34px;height:34px;border-radius:50%;background:var(--ink);color:var(--hivis);
  border:none;font-size:20px;font-weight:700;cursor:pointer;flex:none;
  display:flex;align-items:center;justify-content:center;line-height:1;
  transition:transform .12s;
}
.add-btn:hover{transform:scale(1.08);background:var(--hivis);color:var(--ink);}

.add-custom-toggle{
  margin-top:14px;font-family:var(--font-mono);font-size:12.5px;color:var(--hivis);
  background:none;border:1px dashed var(--hivis-dim);border-radius:8px;padding:9px 12px;
  cursor:pointer;width:100%;text-align:left;
}
.custom-form{
  margin-top:12px;display:none;background:var(--asphalt);border:1px solid var(--line);
  border-radius:10px;padding:14px;gap:10px;grid-template-columns:1fr 1fr;
}
.custom-form.open{display:grid;}
.custom-form input,.custom-form select{
  background:var(--panel-2);border:1px solid var(--line);color:var(--chalk);
  padding:8px 10px;border-radius:6px;font-size:13px;font-family:var(--font-body);width:100%;
}
.custom-form label{font-size:10.5px;color:var(--fog);text-transform:uppercase;letter-spacing:0.06em;display:block;margin-bottom:4px;}
.custom-form .full{grid-column:1/-1;}
.custom-form .row-checkbox{display:flex;align-items:center;gap:8px;}
.custom-form .row-checkbox input{width:auto;}
.custom-submit{
  grid-column:1/-1;background:var(--hivis);color:var(--ink);border:none;
  font-weight:700;font-family:var(--font-mono);padding:9px;border-radius:6px;cursor:pointer;margin-top:2px;
}

/* plan */
.plan-list{display:flex;flex-direction:column;gap:8px;margin-bottom:16px;}
.plan-empty{
  color:var(--fog-2);font-size:13px;padding:30px 10px;text-align:center;
  border:1px dashed var(--line);border-radius:10px;
}
.plan-item{
  background:var(--panel-2);border:1px solid var(--line);border-radius:10px;
  padding:10px 12px;display:flex;align-items:center;gap:10px;cursor:pointer;
}
.plan-item.fully-matched{border-color:#8CFF6B;background:#232922;}
.plan-item.armed{border-color:#8CFF6B;background:#2b3a24;box-shadow:0 0 0 2px rgba(140,255,107,0.35);}
.plan-item .gel-icon{flex:none;margin:0;}
.plan-item .struck{text-decoration:line-through;color:var(--fog-2);}
button,.tab,.chip,.step-btn,.add-btn,.rm-btn,.entry-btn,.file-btn{
  touch-action:manipulation;-webkit-tap-highlight-color:transparent;
}
.match-badge{
  font-family:var(--font-mono);font-size:10.5px;font-weight:700;background:#8CFF6B;color:#15171A;
  padding:2px 7px;border-radius:10px;flex:none;
}
.match-badge.armed-badge{background:#15171A;color:#8CFF6B;border:1px solid #8CFF6B;}

.armed-banner{
  position:sticky;top:0;z-index:50;
  background:#8CFF6B;color:#15171A;padding:11px 18px;border-radius:0 0 10px 10px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-family:var(--font-mono);font-weight:700;font-size:13px;
  box-shadow:0 4px 14px rgba(0,0,0,0.35);margin:0 0 16px;
}
.armed-banner button{
  background:#15171A;color:#8CFF6B;border:none;padding:7px 13px;border-radius:6px;
  font-family:var(--font-mono);font-weight:700;font-size:12px;cursor:pointer;flex:none;
}
.plan-item .pname{flex:1;font-size:13.5px;font-weight:600;min-width:0;}
.plan-item .pname .sub{display:block;font-size:11px;color:var(--fog-2);font-weight:500;margin-top:1px;}
.stepper{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);}
.step-btn{
  width:24px;height:24px;border-radius:6px;background:var(--asphalt);border:1px solid var(--line);
  color:var(--chalk);cursor:pointer;font-size:14px;line-height:1;display:flex;align-items:center;justify-content:center;
}
.step-btn:hover{border-color:var(--hivis-dim);}
.plan-item .qty{width:18px;text-align:center;font-size:13px;}
.plan-item .sub-carbs{font-family:var(--font-mono);font-size:14px;width:52px;text-align:right;color:var(--hivis);}
.rm-btn{background:none;border:none;color:var(--fog-2);font-size:16px;cursor:pointer;padding:0 2px;}
.rm-btn:hover{color:var(--ember);}

.plan-totals{border-top:1px solid var(--line);padding-top:14px;display:flex;flex-direction:column;gap:8px;}
.trow{display:flex;justify-content:space-between;font-size:13px;color:var(--fog);}
.trow b{font-family:var(--font-mono);color:var(--chalk);font-weight:600;}
.trow.big{font-size:15px;}
.trow.big b{font-size:18px;}

/* data panel */
.data-panel{margin-top:22px;}
.data-panel summary{
  cursor:pointer;font-family:var(--font-mono);font-size:12.5px;color:var(--fog);
  list-style:none;display:flex;align-items:center;gap:6px;
}
.data-panel summary::-webkit-details-marker{display:none;}
.data-panel summary:before{content:'▸';color:var(--hivis-dim);}
.data-panel[open] summary:before{content:'▾';}
.data-body{margin-top:10px;font-size:12.5px;color:var(--fog);line-height:1.6;}
textarea{
  width:100%;background:var(--asphalt);border:1px solid var(--line);color:var(--chalk);
  font-family:var(--font-mono);font-size:11.5px;border-radius:8px;padding:10px;margin-top:6px;
  min-height:90px;resize:vertical;
}
.data-btns{display:flex;gap:8px;margin-top:8px;flex-wrap:wrap;}
.small-btn{
  background:var(--panel-2);border:1px solid var(--line);color:var(--chalk);
  font-family:var(--font-mono);font-size:12px;padding:7px 12px;border-radius:6px;cursor:pointer;
}
.small-btn:hover{border-color:var(--hivis-dim);}

/* callout / reminder */
.callout{
  background:var(--panel);border:1px solid var(--line);border-left:4px solid var(--hivis);
  border-radius:10px;padding:14px 18px;display:flex;align-items:center;gap:10px;
  margin-bottom:22px;font-size:13.5px;color:var(--chalk);line-height:1.5;
}
.callout b{color:var(--hivis);}
.caffeine-note{font-size:11.5px;color:var(--fog-2);margin:-8px 0 12px;}

/* plan header + suggest */
.plan-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;flex-wrap:wrap;gap:8px;}
.plan-head h2{margin:0;}
.suggest-btn{
  background:var(--hivis);color:var(--ink);border:none;font-family:var(--font-mono);
  font-size:12px;font-weight:700;padding:8px 12px;border-radius:8px;cursor:pointer;
}
.suggest-btn:hover{background:var(--hivis-dim);}
.suggest-note{font-size:11.5px;color:var(--hivis);margin:-4px 0 14px;}

/* route panel */
.route-panel{margin-bottom:22px;}
.route-upload-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:4px;}
.file-btn{
  background:var(--panel-2);border:1px solid var(--line);color:var(--chalk);
  font-family:var(--font-mono);font-size:12.5px;padding:9px 14px;border-radius:8px;cursor:pointer;
  display:inline-block;
}
.file-btn:hover{border-color:var(--hivis-dim);}
#gpxFile{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
.route-filename{font-size:12px;color:var(--fog);}
.route-error{font-size:12.5px;color:var(--ember);padding:10px 0 0;}
.route-stats{display:flex;gap:26px;flex-wrap:wrap;margin:16px 0 12px;}
.route-stat .lbl{font-size:10.5px;text-transform:uppercase;letter-spacing:0.08em;color:var(--fog);display:block;}
.route-stat .val{font-family:var(--font-mono);font-size:18px;color:var(--chalk);font-weight:600;}
.route-chart-wrap{background:var(--asphalt);border:1px solid var(--line);border-radius:10px;padding:10px 14px 6px;}
.route-chart-inner{position:relative;}
.route-chart-wrap svg{width:100%;height:auto;display:block;}
.route-hint{font-size:11.5px;color:var(--fog-2);margin-top:8px;}
.route-legend{display:flex;gap:18px;flex-wrap:wrap;margin:12px 0 4px;font-size:11.5px;color:var(--fog);}
.legend-dot{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:6px;vertical-align:-1px;}
.window-list{display:flex;flex-direction:column;gap:8px;margin-top:14px;max-height:280px;overflow-y:auto;padding-right:4px;}
.window-card{
  background:var(--panel-2);border-left:3px solid var(--hivis);border-radius:6px;
  padding:9px 12px;display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;
}
.window-card .wd{font-size:13px;font-weight:600;}
.window-card .wd .sub{display:block;font-size:11px;color:var(--fog-2);font-weight:500;margin-top:2px;}
.window-card .wg{font-family:var(--font-mono);font-size:12.5px;color:var(--hivis);}
.route-assume{font-size:11.5px;color:var(--fog-2);margin-top:12px;line-height:1.5;}
.print-btn{
  display:block;width:100%;margin:14px 0 4px;padding:11px;border-radius:8px;
  background:#8CFF6B;color:#15171A;border:none;font-family:var(--font-mono);
  font-size:13px;font-weight:700;cursor:pointer;
}
.print-btn:hover{background:#a4ff88;}

/* footer */
.footer-note{
  margin-top:34px;padding-top:20px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--fog-2);line-height:1.6;
}
.footer-note b{color:var(--fog);}