:root{
  --bg:#f5f8fa;
  --surface:#ffffff;
  --ink:#0f2a3d;
  --muted:#5b7385;
  --accent:#0a6ebd;
  --accent-dark:#075a9c;
  --border:#dbe6ee;
  --shadow:0 1px 3px rgba(15,42,61,.08),0 8px 24px rgba(15,42,61,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

/* header */
.site-header{
  background:var(--surface);
  border-bottom:1px solid var(--border);
}
.nav{
  max-width:820px;margin:0 auto;padding:16px 20px;
  display:flex;align-items:center;justify-content:space-between;
}
.brand{font-size:20px;font-weight:800;letter-spacing:-.5px;color:var(--ink)}
.brand span{color:var(--accent)}
.nav-links a{margin-left:20px;color:var(--muted);font-weight:600;font-size:15px}
.nav-links a:hover{color:var(--accent);text-decoration:none}

/* layout */
.wrap{max-width:820px;margin:0 auto;padding:40px 20px 64px}
.hero{text-align:center;margin-bottom:28px}
.hero h1{font-size:30px;margin:0 0 8px;letter-spacing:-.6px}
.hero p{color:var(--muted);margin:0;font-size:17px}

/* search */
.search-box{position:relative;margin:28px 0 10px}
.search-box input{
  width:100%;padding:16px 18px 16px 46px;font-size:17px;
  border:1px solid var(--border);border-radius:12px;background:var(--surface);
  box-shadow:var(--shadow);color:var(--ink);
}
.search-box input:focus{outline:none;border-color:var(--accent)}
.search-box .icon{
  position:absolute;left:16px;top:50%;transform:translateY(-50%);
  color:var(--muted);font-size:18px;pointer-events:none;
}
.count{color:var(--muted);font-size:14px;margin:6px 2px 14px}

/* lake list */
.lake-list{list-style:none;margin:0;padding:0;display:grid;
  grid-template-columns:1fr 1fr;gap:10px}
@media(max-width:560px){.lake-list{grid-template-columns:1fr}}
.lake-list li a{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 16px;background:var(--surface);border:1px solid var(--border);
  border-radius:10px;color:var(--ink);font-weight:600;
}
.lake-list li a:hover{border-color:var(--accent);text-decoration:none;box-shadow:var(--shadow)}
.lake-list .state{color:var(--muted);font-weight:600;font-size:13px;
  background:var(--bg);border-radius:6px;padding:2px 8px;margin-left:10px;white-space:nowrap}
.empty{color:var(--muted);text-align:center;padding:40px 0}

/* forms */
.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;
  box-shadow:var(--shadow);padding:28px}
.field{margin-bottom:18px}
.field label{display:block;font-weight:600;margin-bottom:6px;font-size:15px}
.field input,.field textarea{
  width:100%;padding:12px 14px;font-size:16px;font-family:inherit;
  border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--ink);
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent)}
.field textarea{min-height:150px;resize:vertical}
.btn{
  display:inline-block;background:var(--accent);color:#fff;border:none;
  padding:13px 26px;font-size:16px;font-weight:700;border-radius:10px;cursor:pointer;
}
.btn:hover{background:var(--accent-dark)}

/* footer */
.site-footer{border-top:1px solid var(--border);background:var(--surface)}
.site-footer .wrap{padding:24px 20px;text-align:center;color:var(--muted);font-size:14px}

/* ---------- lake page ---------- */
.lake-head{text-align:center;margin-bottom:8px}
.lake-head h1{font-size:28px;margin:0 0 4px;letter-spacing:-.5px}
.lake-head .loc{color:var(--muted);font-size:16px;margin:0}

.level-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;
  box-shadow:var(--shadow);padding:26px;text-align:center;margin:22px 0}
.level-now{font-size:52px;font-weight:800;line-height:1;letter-spacing:-1px;color:var(--ink)}
.level-now .unit{font-size:22px;font-weight:700;color:var(--muted);margin-left:4px}
.level-sub{color:var(--muted);font-size:14px;margin-top:8px}
.level-status{display:inline-block;margin-top:14px;padding:6px 14px;border-radius:999px;
  font-weight:700;font-size:15px}
.status-below{background:#fdeceb;color:#b3261e}
.status-full{background:#e7f4ea;color:#1e7a34}
.status-above{background:#e8f1fb;color:#075a9c}

/* pool bar */
.poolbar{margin:20px auto 4px;max-width:460px}
.poolbar .track{position:relative;height:14px;background:var(--bg);border:1px solid var(--border);
  border-radius:999px;overflow:hidden}
.poolbar .fill{position:absolute;left:0;top:0;bottom:0;background:var(--accent);border-radius:999px}
.poolbar .full-mark{position:absolute;top:-4px;bottom:-4px;width:2px;background:#1e7a34}
.poolbar .labels{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;margin-top:6px}

.stat-row{display:flex;gap:12px;flex-wrap:wrap;margin:8px 0 22px}
.stat{flex:1;min-width:120px;background:var(--surface);border:1px solid var(--border);
  border-radius:12px;padding:14px 16px;text-align:center}
.stat .k{color:var(--muted);font-size:13px}
.stat .v{font-size:22px;font-weight:800;margin-top:2px}

.section-title{font-size:18px;font-weight:800;margin:26px 0 12px}
.chart-wrap{background:var(--surface);border:1px solid var(--border);border-radius:14px;
  box-shadow:var(--shadow);padding:18px}
.chart-wrap canvas{width:100%!important}

.blurb{color:#334e5e;font-size:16px}
.sponsor{background:linear-gradient(135deg,#0a6ebd,#075a9c);color:#fff;border-radius:14px;
  padding:22px 24px;text-align:center;margin:24px 0}
.sponsor h3{margin:0 0 6px;font-size:19px}
.sponsor p{margin:0 0 14px;opacity:.92;font-size:15px}
.sponsor a{display:inline-block;background:#fff;color:var(--accent-dark);font-weight:700;
  padding:10px 20px;border-radius:8px}
.sponsor a:hover{text-decoration:none;background:#eef6ff}
.source-note{color:var(--muted);font-size:13px;text-align:center;margin-top:10px}
.muted-load{color:var(--muted)}

/* chart toggle */
.chart-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;margin:26px 0 12px}
.chart-head .section-title{margin:0}
.toggle{display:inline-flex;background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:3px}
.toggle button{border:none;background:transparent;color:var(--muted);font-weight:700;font-size:13px;
  padding:7px 12px;border-radius:8px;cursor:pointer}
.toggle button.active{background:var(--accent);color:#fff}