@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Bebas+Neue&display=swap');

/* ===== TOKENS ===== */
:root{
  --bg:#f3f5f7;
  --card:#fff;
  --border:#d1d5db;
  --pri:#0d47a1;
  --pri-h:#0b3b8a;
  --txt:#1b1e23;
  --r:6px;
  --fz:clamp(.85rem,.8rem+.3vw,1rem);
}

/* ===== RESET / BASE ===== */
*{margin:0;padding:0;box-sizing:border-box}
body{
  display:flex;flex-direction:column;align-items:center;
  min-height:100vh;padding:1.5rem .75rem;
  background:var(--bg);color:var(--txt);
  font:var(--fz)/1.4 'Inter',Arial,sans-serif;
}

/* ===== TÍTULO + CARRO ===== */
h1{
  position:relative;
  font-family:'Bebas Neue',sans-serif;
  font-size:1.6rem;font-weight:700;letter-spacing:1px;
  color:var(--pri);margin-bottom:1rem;text-align:center;
}
.car{
  position:absolute;top:50%;
  font-size:1.4rem;
  transform:translateY(-50%);              /* já virado para a esquerda */
  animation:
      carMove  4s linear infinite,
      carColor 4s linear infinite;
}
/* deslocamento direita → esquerda */
@keyframes carMove{
  0%   {left:calc(100% + 2rem);}
  100% {left:-2rem;}
}
/* variação de cor */
@keyframes carColor{
  0%   {filter:hue-rotate(0deg);}
  25%  {filter:hue-rotate(60deg);}
  50%  {filter:hue-rotate(120deg);}
  75%  {filter:hue-rotate(180deg);}
  100% {filter:hue-rotate(240deg);}
}

/* ===== CARD ===== */
form,.box{
  width:100%;max-width:42rem;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--r);
  padding:1.25rem 1rem;
}

/* ===== GRID ===== */
form{display:grid;gap:.9rem;grid-template-columns:1fr}
@media(min-width:600px){
  form{grid-template-columns:repeat(2,1fr);}
}

/* ===== FIELDS ===== */
label{display:flex;flex-direction:column;font-weight:500;gap:.25rem}
input,select{
  padding:.55rem .6rem;font-size:var(--fz);
  border:1px solid var(--border);
  border-radius:var(--r);
  background:#fff;
}
input:focus,select:focus{outline:none;border-color:var(--pri)}

/* ===== BUTTON ===== */
button{
  grid-column:1/-1;
  padding:.65rem;
  border:0;
  border-radius:var(--r);
  background:var(--pri);
  color:#fff;
  font-weight:600;
  cursor:pointer;
}
button:hover{background:var(--pri-h)}

/* ===== SEÇÕES ENERGIA ===== */
#gas,#ele{
  display:flex;
  flex-direction:column;
  gap:.9rem;
  grid-column:1/-1;
}
hr{
  border:0;
  border-top:1px solid var(--border);
  margin:.4rem 0;
}

/* ===== SUMMARY ===== */
.box{
  margin-top:1rem;
  text-align:center;
  display:flex;
  flex-direction:column;
  gap:.7rem;
}
.callout{
  background:var(--pri);
  color:#fff;
  padding:.6rem;
  border-radius:var(--r);
  font-weight:600;
  font-size:1rem;
}
.res{
  width:100%;
  border-collapse:collapse;
  margin-bottom:.6rem;
}
.res th,.res td{
  padding:.5rem .4rem;
  border-bottom:1px solid var(--border);
  font-size:var(--fz);
}
.res th{text-align:left;font-weight:500}
.res td{text-align:right;font-weight:600}
.tip{font-size:.9rem;color:#333}
.tip strong{color:#0b3b8a}

/* ===== MOBILE XS ===== */
@media(max-width:400px){
  body{padding:1rem .5rem}
  form,.box{padding:1rem .75rem}
}