@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root{
  --bg:#0A0A0A;
  --surface:#151515;
  --surface-2:#1D1D1D;
  --border:#2A2A2A;
  --text:#F5F5F0;
  --text-muted:#8F8F87;
  --accent:#C8F135;
  --accent-text:#0A0A0A;
  --danger:#FF6B6B;
  --radius:10px;
  --font-display:'Space Grotesk', system-ui, sans-serif;
  --font-body:'Inter', system-ui, sans-serif;
  --font-mono:'JetBrains Mono', 'SFMono-Regular', Menlo, monospace;
}

[data-theme="light"]{
  --bg:#FAFAF6;
  --surface:#FFFFFF;
  --surface-2:#F1F1EA;
  --border:#E2E2D8;
  --text:#14140F;
  --text-muted:#6E6E64;
  --accent:#C8F135;
  --accent-text:#14140F;
  --danger:#C6402C;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  -webkit-font-smoothing:antialiased;
  transition:background .2s ease, color .2s ease;
  overscroll-behavior-y:none;
}
button, input, select{ font-family:inherit; color:inherit; }
button{ cursor:pointer; }
::selection{ background:var(--accent); color:var(--accent-text); }

/* ---------- Layout shell ---------- */
.app{
  max-width:960px;
  margin:0 auto;
  min-height:100%;
  display:flex;
  flex-direction:column;
}

.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:20px 20px 8px;
}
.brand{
  display:flex;
  align-items:baseline;
  gap:8px;
}
.brand-mark{
  font-family:var(--font-display);
  font-weight:700;
  font-size:20px;
  letter-spacing:-0.02em;
}
.brand-mark span{ color:var(--accent); }
.brand-sub{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--text-muted);
  letter-spacing:.04em;
}

.theme-toggle{
  width:44px; height:26px;
  border-radius:99px;
  background:var(--surface-2);
  border:1px solid var(--border);
  position:relative;
  padding:2px;
}
.theme-toggle .knob{
  width:20px; height:20px;
  border-radius:50%;
  background:var(--accent);
  transition:transform .2s ease;
  transform:translateX(0);
}
[data-theme="light"] .theme-toggle .knob{ transform:translateX(18px); }

main{
  flex:1;
  padding:8px 20px 100px;
}

.view{ display:none; animation:fade .18s ease; }
.view.active{ display:block; }
@keyframes fade{ from{opacity:0; transform:translateY(4px);} to{opacity:1; transform:none;} }

.view-header{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  margin:18px 0 14px;
}
.view-title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:26px;
  letter-spacing:-0.01em;
}
.view-count{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--text-muted);
}

/* ---------- Add row ---------- */
.add-row{
  display:flex;
  gap:8px;
  margin-bottom:18px;
}
.add-row input[type="text"], .add-row input[type="number"]{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:12px 14px;
  color:var(--text);
  font-size:15px;
  outline:none;
}
.add-row input[type="text"]{ flex:1; min-width:0; }
.add-row input:focus{ border-color:var(--accent); }
.qty-input{ width:64px; text-align:center; }
.add-btn{
  background:var(--accent);
  color:var(--accent-text);
  border:none;
  border-radius:var(--radius);
  width:46px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:20px;
  line-height:1;
  flex-shrink:0;
}
.add-btn:active{ transform:scale(.94); }

/* ---------- Ledger list ---------- */
.ledger{
  list-style:none;
  margin:0; padding:0;
}
.ledger-item{
  display:flex;
  align-items:center;
  gap:12px;
  padding:13px 4px;
  border-bottom:1px dashed var(--border);
}
.ledger-item:last-child{ border-bottom:none; }

.check{
  width:22px; height:22px;
  border-radius:6px;
  border:2px solid var(--border);
  flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  background:transparent;
  transition:background .15s ease, border-color .15s ease;
}
.check svg{
  width:13px; height:13px;
  opacity:0;
  transform:scale(.6);
  transition:opacity .12s ease, transform .12s ease;
}
.ledger-item.checked .check{
  background:var(--accent);
  border-color:var(--accent);
}
.ledger-item.checked .check svg{ opacity:1; transform:scale(1); }

.item-name{
  flex:1;
  min-width:0;
  font-size:15px;
  overflow-wrap:anywhere;
}
.ledger-item.checked .item-name{
  color:var(--text-muted);
  text-decoration:line-through;
  text-decoration-color:var(--text-muted);
}
.item-qty{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--text-muted);
  flex-shrink:0;
}
.item-remove{
  background:none;
  border:none;
  color:var(--text-muted);
  font-size:18px;
  line-height:1;
  padding:4px 6px;
  flex-shrink:0;
  border-radius:6px;
}
.item-remove:hover{ color:var(--danger); }

.section-label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--text-muted);
  margin:26px 0 6px;
  display:flex;
  align-items:center;
  gap:8px;
}
.section-label::after{
  content:'';
  flex:1;
  border-top:1px dashed var(--border);
}
.clear-btn{
  background:none;
  border:1px solid var(--border);
  color:var(--text-muted);
  font-family:var(--font-mono);
  font-size:11px;
  padding:6px 10px;
  border-radius:99px;
}
.clear-btn:hover{ border-color:var(--danger); color:var(--danger); }

.empty-state{
  padding:34px 10px;
  text-align:center;
  color:var(--text-muted);
  font-size:14px;
}
.empty-state .glyph{
  font-family:var(--font-display);
  font-size:28px;
  color:var(--border);
  display:block;
  margin-bottom:6px;
}

/* ---------- Bike view ---------- */
.bike-form{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:14px;
  padding:16px;
  margin-bottom:20px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:10px;
}
.field{ display:flex; flex-direction:column; gap:5px; }
.field label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--text-muted);
}
.field input, .field select{
  background:var(--surface-2);
  border:1px solid var(--border);
  border-radius:8px;
  padding:10px 11px;
  font-size:14px;
  outline:none;
}
.field input:focus, .field select:focus{ border-color:var(--accent); }
.field.full{ grid-column:1 / -1; }
.bike-submit{
  grid-column:1 / -1;
  background:var(--accent);
  color:var(--accent-text);
  border:none;
  border-radius:8px;
  padding:12px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:14px;
  margin-top:4px;
}
.bike-submit:active{ transform:scale(.98); }

.stat-row{
  display:flex;
  gap:10px;
  margin-bottom:20px;
}
.stat-card{
  flex:1;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:12px;
  padding:14px 16px;
}
.stat-card .k{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--text-muted);
}
.stat-card .v{
  font-family:var(--font-mono);
  font-size:22px;
  font-weight:600;
  margin-top:4px;
}
.stat-card .v.accent{ color:var(--accent); }

.log-entry{
  display:flex;
  align-items:flex-start;
  gap:14px;
  padding:14px 4px;
  border-bottom:1px dashed var(--border);
}
.log-entry:last-child{ border-bottom:none; }
.log-date{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--text-muted);
  width:64px;
  flex-shrink:0;
  line-height:1.3;
  padding-top:2px;
}
.log-body{ flex:1; min-width:0; }
.log-type{ font-size:15px; font-weight:500; }
.log-notes{ font-size:12.5px; color:var(--text-muted); margin-top:2px; }
.log-price{
  font-family:var(--font-mono);
  font-size:15px;
  font-weight:600;
  color:var(--accent);
  flex-shrink:0;
}

/* ---------- Nav: bottom bar (mobile-first) ---------- */
.tabbar{
  position:fixed;
  left:0; right:0; bottom:0;
  display:flex;
  background:var(--surface);
  border-top:1px solid var(--border);
  padding:8px 10px calc(8px + env(safe-area-inset-bottom));
  max-width:960px;
  margin:0 auto;
  z-index:10;
}
.tab-btn{
  flex:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:4px;
  background:none;
  border:none;
  color:var(--text-muted);
  padding:6px 4px;
  border-radius:10px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.03em;
}
.tab-btn svg{ width:20px; height:20px; }
.tab-btn.active{ color:var(--accent); }

/* ---------- Desktop layout ---------- */
@media (min-width:780px){
  .app{ flex-direction:row; max-width:1100px; }
  .tabbar{
    position:sticky;
    top:0;
    flex-direction:column;
    width:220px;
    height:100vh;
    border-top:none;
    border-right:1px solid var(--border);
    padding:20px 12px;
    gap:6px;
    justify-content:flex-start;
  }
  .tab-btn{
    flex-direction:row;
    justify-content:flex-start;
    gap:10px;
    padding:11px 12px;
    font-size:13px;
  }
  .tab-btn.active{ background:var(--surface-2); }
  main{ flex:1; padding:8px 40px 60px; max-width:640px; }
  .topbar{ display:none; }
  .sidebar-brand{
    display:flex;
    align-items:baseline;
    gap:8px;
    padding:4px 12px 22px;
    border-bottom:1px solid var(--border);
    margin-bottom:14px;
  }
  .sidebar-brand .brand-mark{ font-size:18px; }
  .sidebar-foot{
    margin-top:auto;
    padding:12px;
  }
  .bike-form{ grid-template-columns:1fr 1fr 1fr; }
  .field.full{ grid-column:auto; }
  .field.notes{ grid-column:1 / -1; }
}

@media (min-width:780px){ .mobile-only{ display:none; } }
@media (max-width:779px){ .desktop-only{ display:none; } }

:focus-visible{ outline:2px solid var(--accent); outline-offset:2px; }