:root{
  /* LIGHT THEME (default) */
  --bg: #f6f8ff;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #51607a;

  /* Caribbean-friendly accents */
  --accent: #2563eb;     /* ocean blue */
  --accent2: #10b981;    /* sea green */
  --danger: #ef4444;
  --warn: #f59e0b;

  --border: rgba(15, 23, 42, 0.10);
  --shadow: 0 10px 30px rgba(15,23,42,0.08);
  --shadow2: 0 6px 18px rgba(15,23,42,0.10);
}

*{box-sizing:border-box;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial;}
body{
  margin:0;
  color:var(--text);
  background:
    radial-gradient(900px 500px at 20% 0%, rgba(37,99,235,0.10), transparent 55%),
    radial-gradient(900px 500px at 90% 10%, rgba(16,185,129,0.10), transparent 55%),
    linear-gradient(180deg, #f7fbff 0%, #f6f8ff 60%, #f4f7ff 100%);
}

.container{max-width:980px;margin:0 auto;padding:24px;}

/* NAV */
.nav{
  display:flex;gap:12px;align-items:center;justify-content:space-between;
  padding:14px 18px;border:1px solid var(--border);border-radius:16px;
  background: rgba(255,255,255,0.78);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow2);
}
.nav a{
  color: var(--muted);
  text-decoration:none;
  font-weight:700;
}
.nav a:hover{ color: var(--text); text-decoration: underline; }

/* CARDS */
.card{
  margin-top:18px;
  padding:18px;
  border:1px solid var(--border);
  border-radius:18px;
  background: var(--card);
  box-shadow: var(--shadow);
}

/* LAYOUT */
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
@media(max-width:720px){.row{grid-template-columns:1fr;}}

h1,h2{margin:0 0 10px 0}
h3{margin:0 0 8px 0}

label{display:block;margin:10px 0 6px;color:var(--muted);font-size:13px;font-weight:700;}

input,select{
  width:100%;
  padding:12px 12px;
  border-radius:12px;
  border:1px solid rgba(15,23,42,0.14);
  background:#ffffff;
  color:var(--text);
  outline:none;
  box-shadow: 0 1px 0 rgba(15,23,42,0.03);
}
input:focus, select:focus{
  border-color: rgba(37,99,235,0.35);
  box-shadow: 0 0 0 4px rgba(37,99,235,0.10);
}

/* BUTTONS */
button{
  padding:12px 14px;
  border-radius:12px;
  border:1px solid rgba(37,99,235,0.25);
  background: linear-gradient(180deg, rgba(37,99,235,1), rgba(29,78,216,1));
  color:white;
  font-weight:900;
  cursor:pointer;
  box-shadow: 0 8px 18px rgba(37,99,235,0.18);
}
button:hover{ filter: brightness(1.05); }
button.secondary{
  background: #ffffff;
  color: var(--text);
  border: 1px solid rgba(15,23,42,0.14);
  box-shadow: 0 8px 18px rgba(15,23,42,0.08);
}
button.secondary:hover{ background: rgba(15,23,42,0.03); }
button.danger{
  background: linear-gradient(180deg, rgba(239,68,68,1), rgba(220,38,38,1));
  border-color: rgba(239,68,68,0.30);
  box-shadow: 0 8px 18px rgba(239,68,68,0.16);
}

/* Link-style buttons (<a class="btn ..."> in your pages) */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 14px;
  border-radius:12px;
  border:1px solid rgba(15,23,42,0.14);
  background:#ffffff;
  color:var(--text);
  text-decoration:none;
  font-weight:900;
  box-shadow: 0 8px 18px rgba(15,23,42,0.08);
}
.btn:hover{ background: rgba(15,23,42,0.03); }
.btnPrimary{
  border-color: rgba(37,99,235,0.25);
  background: rgba(37,99,235,0.10);
}
.btnPrimary:hover{ background: rgba(37,99,235,0.14); }

/* BADGES */
.badge{
  display:inline-block;
  padding:6px 10px;
  border-radius:999px;
  font-weight:900;
  font-size:12px;
  border:1px solid rgba(15,23,42,0.12);
  background: rgba(15,23,42,0.03);
}
.badge.ok{
  background: rgba(16,185,129,0.12);
  border:1px solid rgba(16,185,129,0.28);
  color:#065f46;
}
.badge.off{
  background: rgba(239,68,68,0.10);
  border:1px solid rgba(239,68,68,0.28);
  color:#7f1d1d;
}

.small{color:var(--muted);font-size:13px;margin-top:8px;}
hr{border:none;border-top:1px solid rgba(15,23,42,0.10);margin:16px 0;}

/* KV blocks (if you still use them anywhere) */
.kv{display:flex;gap:10px;flex-wrap:wrap;}
.kv div{
  padding:10px 12px;
  border-radius:14px;
  border:1px solid rgba(15,23,42,0.10);
  background: rgba(15,23,42,0.02);
  min-width:180px;
}
.kv b{display:block;font-size:12px;color:var(--muted);margin-bottom:4px;}

.toast{margin-top:10px;color:var(--muted);font-size:13px;}

/* Content helpers */
.callout{
  border:1px solid rgba(15,23,42,0.12);
  background: rgba(37,99,235,0.06);
  padding: 12px 14px;
  border-radius: 14px;
  font-size: 13px;
  line-height: 1.45;
}
.callout.warn{
  border-color: rgba(245,158,11,0.25);
  background: rgba(245,158,11,0.10);
}
.list{
  margin: 10px 0 0 18px;
  padding: 0;
  line-height: 1.55;
  font-size: 13px;
  color: rgba(15,23,42,0.85);
}
.miniCard{
  border:1px solid rgba(15,23,42,0.10);
  background:#ffffff;
  border-radius:16px;
  padding:14px;
  box-shadow: 0 10px 20px rgba(15,23,42,0.06);
}

/* Footer */
.footer{
  margin-top: 18px;
  padding: 18px 0;
  border-top: 1px solid rgba(15,23,42,0.10);
  opacity: 0.95;
}
.footer-inner{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: rgba(15,23,42,0.75);
}
.footer a{
  color: rgba(15,23,42,0.85);
  text-decoration: none;
}
.footer a:hover{
  text-decoration: underline;
}
.footer .dot{ opacity: 0.5; }

/* Tooltips */
.info{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:18px;height:18px;
  margin-left:6px;
  border-radius:999px;
  border:1px solid rgba(15,23,42,0.18);
  background: rgba(15,23,42,0.02);
  color: rgba(15,23,42,0.85);
  font-weight:900;
  font-size:12px;
  cursor:help;
  position:relative;
  user-select:none;
}
.info::after{
  content: attr(data-tip);
  position:absolute;
  left:50%;
  transform:translateX(-50%);
  bottom:130%;
  min-width:220px;
  max-width:320px;
  padding:10px 10px;
  border-radius:12px;
  border:1px solid rgba(15,23,42,0.14);
  background:#ffffff;
  color: rgba(15,23,42,0.92);
  font-size:12px;
  line-height:1.35;
  box-shadow: var(--shadow2);
  opacity:0;
  pointer-events:none;
  transition:opacity 0.15s ease;
  z-index:50;
}
.info::before{
  content:"";
  position:absolute;
  left:50%;
  transform:translateX(-50%);
  bottom:120%;
  border:7px solid transparent;
  border-top-color:#ffffff;
  opacity:0;
  transition:opacity 0.15s ease;
}
.info:hover::after,
.info:hover::before{ opacity:1; }

/* Pair selector (if any old pages still use it) */
.pair-grid{ display:flex; flex-wrap:wrap; gap:10px; margin-top:8px; }
.pair-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 12px;
  border-radius:999px;
  border:1px solid rgba(15,23,42,0.14);
  background:#ffffff;
  color: rgba(15,23,42,0.92);
  font-weight:900;
  box-shadow: 0 8px 18px rgba(15,23,42,0.06);
}
.pair-btn:hover{ background: rgba(15,23,42,0.03); }
.pair-btn.selected{
  border-color: rgba(37,99,235,0.30);
  background: rgba(37,99,235,0.10);
}
.pair-btn.locked{ opacity:0.65; }
.pair-btn.disabled{ cursor:not-allowed; filter: grayscale(25%); }
.locktag{
  font-size:11px;
  padding:2px 8px;
  border-radius:999px;
  border:1px solid rgba(15,23,42,0.14);
  opacity:0.9;
}
.pair-sep{
  width:100%;
  margin-top:6px;
  padding-top:10px;
  border-top:1px solid rgba(15,23,42,0.10);
  font-size:12px;
  opacity:0.8;
}

/* OPTIONAL: If user prefers dark mode, switch automatically */
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0b1220;
    --card:#0f1a2e;
    --text:#e8eefc;
    --muted:#a9b6d3;
    --accent:#4f7cff;
    --accent2:#22c55e;
    --danger:#ff4f6d;
    --warn:#f59e0b;
    --border: rgba(255,255,255,0.10);
    --shadow: 0 10px 30px rgba(0,0,0,0.30);
    --shadow2: 0 6px 18px rgba(0,0,0,0.28);
  }
  body{
    background:
      radial-gradient(900px 500px at 20% 0%, rgba(79,124,255,0.18), transparent 55%),
      radial-gradient(900px 500px at 90% 10%, rgba(34,197,94,0.10), transparent 55%),
      linear-gradient(120deg,#06101f,#0b1220);
  }
  .nav{ background: rgba(15,26,46,0.62); }
  .card{ background: rgba(15,26,46,0.65); }
  .miniCard{ background:#0b1528; box-shadow:none; }
  input,select{ background:#0b1528; color:var(--text); border-color: var(--border); }
  button.secondary, .btn{ background:#0b1528; color:var(--text); }
  .kv div{ background:#0b1528; }
  .info::after{ background:#071024; border-color: rgba(255,255,255,0.12); color: rgba(255,255,255,0.92); }
  .info::before{ border-top-color:#071024; }
}