/* public/style.css
   Shared site styles for EnergyCostLab
*/

:root{
  --bg: #ffffff;
  --fg: #111827;
  --muted: #6b7280;
  --border: rgba(0,0,0,0.12);
  --panel: rgba(0,0,0,0.03);
  --link: #1f4bd8;

  --radius: 14px;
  --pad: 16px;
  --maxw: 1100px;

  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
  --sans: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

*{ box-sizing: border-box; }

html, body{
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  line-height: 1.35;
}

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

.container{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px;
}

.site-header{
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
}

.brand{
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.brand-title{
  font-size: 18px;
  font-weight: 700;
  margin: 0;
}
.brand-sub{
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}

.nav{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.nav a{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
}
.nav a:hover{
  background: rgba(0,0,0,0.04);
  border-color: rgba(0,0,0,0.06);
}

.main{
  margin-top: 16px;
}

.grid{
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(12, 1fr);
}

.card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--pad);
  background: #fff;
}

.card h2, .card h3{
  margin: 0 0 8px 0;
}
.card p{
  margin: 0 0 10px 0;
  color: var(--muted);
}

.kicker{
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 8px 0;
}

.list{
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}
.list li{ margin: 6px 0; }

.badges{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}
.badge{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.03);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
  color: var(--fg);
}
.mono{
  font-family: var(--mono);
  font-size: 12px;
}

.footer{
  margin-top: 18px;
  padding: 14px 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}

.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(0,0,0,0.12);
  background: rgba(0,0,0,0.03);
  color: var(--fg);
  cursor: pointer;
}
.btn:hover{
  background: rgba(0,0,0,0.06);
}

.btn.primary{
  background: rgba(31,75,216,0.10);
  border-color: rgba(31,75,216,0.25);
}
.btn.primary:hover{
  background: rgba(31,75,216,0.14);
}

@media (max-width: 900px){
  .grid{ grid-template-columns: 1fr; }
}