/* Pump Margin — Breadcrumb Labs Design System */
:root {
  --bg: #f5f6f4;
  --panel: #ffffff;
  --ink: #0b1220;
  --ink-soft: #4b5566;
  --ink-mute: #8a93a3;
  --line: #e4e7e1;
  --line-strong: #d1d6cd;
  --accent: #0f7a4f;
  --accent-soft: #e8f5ee;
  --warn: #b54708;
  --shadow: 0 1px 0 rgba(11,18,32,.04), 0 8px 24px -12px rgba(11,18,32,.12);
  --radius: 14px;
  --radius-sm: 10px;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Satoshi', system-ui, -apple-system, 'Segoe UI', Inter, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  max-width: 880px;
  margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-name { font-weight: 700; font-size: 17px; letter-spacing: -0.01em; }
.brand-sub { font-size: 12px; color: var(--accent); letter-spacing: 0.04em; text-transform: uppercase; font-weight: 700; }
.top-actions { display: flex; align-items: center; gap: 12px; }
.maker {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,.72);
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .02em;
}
.sheet-link { font-size: 13px; color: var(--ink-soft); }

/* Layout */
.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 22px 64px;
}

.intro h1 {
  font-size: 28px;
  letter-spacing: -0.02em;
  margin: 18px 0 8px;
  line-height: 1.15;
}
.eyebrow {
  display: inline-flex;
  margin-top: 12px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.intro p {
  color: var(--ink-soft);
  margin: 0 0 26px;
  max-width: 62ch;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}

/* Toggles */
.row.toggles {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.seg {
  display: inline-flex;
  background: #f0f2ee;
  border-radius: 999px;
  padding: 4px;
  border: 1px solid var(--line);
}
.seg-btn {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 8px 14px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  border-radius: 999px;
  cursor: pointer;
  transition: background .15s ease, color .15s ease;
}
.seg-btn:hover { color: var(--ink); }
.seg-btn.active {
  background: var(--ink);
  color: #fff;
}

/* Inputs */
.inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 22px;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.field span {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  letter-spacing: 0.01em;
}
.field em {
  font-style: normal;
  color: var(--ink-mute);
  font-weight: 500;
}
.field input {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font: inherit;
  font-variant-numeric: tabular-nums;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.field input:focus {
  outline: 0;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.field input[readonly] {
  background: #f7f8f5;
  color: var(--ink-soft);
  cursor: default;
}
.field.readout {
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  justify-content: center;
}
.field.readout strong {
  font-size: 20px;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.blended-fields {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
}
.blended-fields[hidden] { display: none; }
.field[hidden] { display: none; }

/* Outputs */
.outputs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 4px;
}
.out {
  background: #faf9f6;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px;
}
.out.big {
  background: #0b1220;
  color: #fff;
  border-color: #0b1220;
  grid-column: span 1;
}
.out-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.out.big .out-label { color: rgba(255,255,255,.65); }
.out-value {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}
.out.big .out-value { color: #50e3a4; }
.out-value.warn { color: var(--warn); }
.out.big .out-value.warn { color: #ffb38a; }

.note {
  margin: 18px 0 0;
  color: var(--ink-mute);
  font-size: 12px;
}

/* Breakdown */
.breakdown h2 { font-size: 15px; margin: 0 0 12px; letter-spacing: -0.01em; }
.kv { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.kv td {
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
}
.kv td:last-child { text-align: right; font-weight: 600; }
.kv tr:last-child td { border-bottom: 0; }
.kv tr.total td { font-weight: 700; border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); padding-top: 12px; padding-bottom: 12px; }
.kv tr.margin td { font-weight: 700; color: var(--accent); }
.kv .sub { color: var(--ink-mute); font-weight: 500; font-size: 12px; }

/* Assumptions */
.assumptions details { border-radius: 8px; }
.assumptions summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  list-style: none;
  padding: 4px 0;
}
.assumptions summary::-webkit-details-marker { display: none; }
.assumptions summary::before { content: '+'; display: inline-block; width: 18px; color: var(--accent); font-weight: 700; }
.assumptions details[open] summary::before { content: '−'; }
.ass-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-top: 16px;
}
.ass-grid h3 {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 8px;
  color: var(--ink-mute);
}
.hint { margin: 14px 0 0; font-size: 12px; color: var(--ink-mute); }

/* ── Account / Auth section ── */
.account-card { margin-top: 0; }
.account-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.account-header h2 { font-size: 15px; margin: 0; letter-spacing: -0.01em; }

.auth-toggle-btn {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: #fff;
  border-radius: 8px;
  padding: 7px 14px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all .15s;
}
.auth-toggle-btn:hover { border-color: var(--accent); color: var(--accent); }

.auth-hint { font-size: 13px; color: var(--ink-soft); margin: 0 0 14px; }

.auth-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 18px;
}
.auth-tab {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-mute);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color .15s, border-color .15s;
}
.auth-tab:hover { color: var(--ink-soft); }
.auth-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.auth-form-wrap { display: none; }
.auth-form-wrap.visible { display: block; }

.auth-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 13px;
}
.auth-field label {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  letter-spacing: .01em;
}
.auth-field input {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 10px 13px;
  font: inherit;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  transition: border-color .15s, box-shadow .15s;
}
.auth-field input:focus { outline: 0; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.btn-primary {
  appearance: none;
  border: 0;
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 11px 22px;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  transition: opacity .15s;
  letter-spacing: -0.01em;
}
.btn-primary:hover { opacity: .88; }

.auth-error { color: var(--warn); font-size: 12px; margin: 8px 0 0; }

/* Logged-in state */
.logged-in-bar {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}
.logged-in-bar.visible { display: flex; }
.logged-in-name { font-size: 13px; font-weight: 600; color: var(--accent); }
.btn-ghost {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: #fff;
  border-radius: 6px;
  padding: 5px 12px;
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all .15s;
}
.btn-ghost:hover { border-color: var(--ink-soft); color: var(--ink); }

/* Logs */
.logs-section { display: none; }
.logs-section.visible { display: block; }
.logs-title { font-size: 14px; font-weight: 700; margin: 0 0 10px; letter-spacing: -0.01em; }
.log-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
.log-row:last-child { border-bottom: 0; }
.log-date { color: var(--ink-mute); flex: 0 0 140px; }
.log-type { flex: 0 0 70px; }
.log-pill {
  display: inline-flex;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .03em;
  text-transform: uppercase;
}
.log-pill.gas { background: #dbeafe; color: #1d4ed8; }
.log-pill.diesel { background: #fef3c7; color: #92400e; }
.log-margin { font-weight: 700; margin-left: auto; }
.log-margin.pos { color: var(--accent); }
.log-margin.neg { color: var(--warn); }
.log-empty { color: var(--ink-mute); font-size: 13px; }

/* Trend */
.trend-section { display: none; }
.trend-section.visible { display: block; }
.trend-fuel-block { margin-bottom: 18px; }
.trend-fuel-block:last-child { margin-bottom: 0; }
.trend-fuel-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.trend-fuel-name { font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-mute); }
.trend-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
}
.trend-badge.up { background: var(--accent-soft); color: var(--accent); }
.trend-badge.down { background: #fef0e6; color: var(--warn); }
.trend-badge.flat { background: #f0f2ee; color: var(--ink-mute); }
.trend-no-data { color: var(--ink-mute); font-size: 12px; }

/* Save indicator */
.save-note {
  display: none;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--accent);
  margin-top: 10px;
  font-weight: 600;
}
.save-note.visible { display: flex; }

/* Mobile */
@media (max-width: 720px) {
  .intro h1 { font-size: 24px; }
  .inputs { grid-template-columns: 1fr; }
  .blended-fields { grid-template-columns: 1fr; }
  .outputs { grid-template-columns: 1fr 1fr; }
  .out.big { grid-column: 1 / -1; }
  .ass-grid { grid-template-columns: 1fr; }
  .row.toggles { flex-direction: column; align-items: stretch; }
  .seg { width: 100%; justify-content: stretch; }
  .seg-btn { flex: 1; text-align: center; }
  .log-date { flex: 0 0 100px; font-size: 11px; }
}