/* ===== Scoped CSS for Fuel Tool ===== */
#fuel-tool {
  --bg:#0b1224; --card:#121b35; --muted:#9db0d1; --text:#eef3ff;
  --accent:#6d7dff; --accent2:#18c3ff;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
  color:var(--text);
}
#fuel-tool * { box-sizing: border-box; }
#fuel-tool .fc-wrap {
  background: radial-gradient(900px 500px at 110% -10%, rgba(109,125,255,.18), transparent),
              radial-gradient(800px 480px at -10% 120%, rgba(24,195,255,.14), transparent),
              var(--bg);
  padding: 22px;
}
#fuel-tool .fc-card {
  max-width: 900px; margin: 0 auto;
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.07);
  border-radius: 18px;
  backdrop-filter: blur(6px);
  padding: 16px;
}
#fuel-tool .fc-header {
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(255,255,255,.12);
}
#fuel-tool .fc-title {
  display: flex; align-items: center; gap: 10px; position: relative;
}
#fuel-tool .fc-title::after {
  content: ""; position: absolute; bottom: 0; left: 0;
  width: 120px; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
}
#fuel-tool .fc-title h1 {
  font-size: clamp(20px, 3.3vw, 28px); margin: 0;
}
#fuel-tool .fc-sub { color: var(--muted); font-size: 14px; }
#fuel-tool .fc-grid {
  display: grid; grid-template-columns: repeat(12, 1fr); gap: 12px; padding-top: 12px;
}
#fuel-tool .fc-input {
  grid-column: span 12;
  background: var(--card);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 14px;
  padding: 12px;
}
@media(min-width:720px){ #fuel-tool .fc-input { grid-column: span 6; } }
@media(min-width:980px){ #fuel-tool .fc-input { grid-column: span 4; } }
#fuel-tool label { font-weight: 600; font-size: 14px; display: block; margin-bottom: 6px; }
#fuel-tool input, #fuel-tool select {
  width: 100%; background: #0f1730; border: 1px solid rgba(255,255,255,.08);
  color: var(--text); border-radius: 12px; padding: 10px; font-size: 15px;
}
#fuel-tool .fc-actions {
  grid-column: span 12; display: flex; gap: 10px; padding-top: 8px;
}
#fuel-tool .fc-btn {
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border: 0; color: #fff; padding: 10px 16px;
  border-radius: 999px; font-weight: 700; cursor: pointer;
}
#fuel-tool .fc-btn-ghost {
  background: transparent; border: 1px solid rgba(255,255,255,.14);
}
#fuel-tool .fc-results { padding: 8px 0; }
#fuel-tool .fc-stats {
  display: grid; grid-template-columns: repeat(12,1fr); gap: 10px;
}
#fuel-tool .fc-stat {
  grid-column: span 12; background: var(--card);
  border-radius: 16px; padding: 14px;
}
@media(min-width:720px){ #fuel-tool .fc-stat { grid-column: span 4; } }
#fuel-tool .lbl { color: var(--muted); font-size: 12px; }
#fuel-tool .val { font-size: 20px; font-weight: 800; }
#fuel-tool .fc-tips { color: var(--muted); font-size: 13px; padding-top: 10px; }
#fuel-tool .fc-tips ul { margin-top: 6px; }