:root {
  --bg: #0b1020;
  --panel: #121a30;
  --panel2: #0e1526;
  --line: #223052;
  --text: #d7e1f7;
  --sub: #7d8db3;
  --accent: #37e0ff;
  --accent2: #7c5cff;
  --ok: #3ddc84;
  --warn: #ffc850;
  --err: #ff5d6c;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: radial-gradient(1200px 600px at 70% -10%, #16224a 0%, var(--bg) 55%);
  color: var(--text);
  font: 15px/1.45 "Segoe UI", system-ui, -apple-system, sans-serif;
  min-height: 100vh;
}
.hidden { display: none !important; }
.sub { color: var(--sub); font-size: 13px; font-weight: normal; }
.error { color: var(--err); min-height: 1.2em; margin-top: 8px; font-size: 14px; }

/* ---------- login ---------- */
#login-view { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  padding: 36px 40px; width: 360px; box-shadow: 0 20px 60px rgba(0,0,0,.5);
}
.login-card h1 { margin: 0 0 4px; font-size: 30px; letter-spacing: 1px; }
.login-card .sub { margin: 0 0 24px; }
.login-card label { display: block; margin-bottom: 14px; color: var(--sub); font-size: 13px; }
.login-card input {
  display: block; width: 100%; margin-top: 5px; padding: 10px 12px;
  background: var(--panel2); color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; font-size: 15px;
}
.login-card input:focus { outline: none; border-color: var(--accent); }

/* ---------- layout ---------- */
header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 26px; border-bottom: 1px solid var(--line);
  background: rgba(10, 14, 28, .7); backdrop-filter: blur(6px);
  position: sticky; top: 0; z-index: 5;
}
.brand { font-size: 20px; font-weight: 600; letter-spacing: 1px; }
.header-right { display: flex; align-items: center; gap: 14px; }
main { max-width: 1200px; margin: 0 auto; padding: 22px 26px 60px; }
.two-col { display: grid; grid-template-columns: 1fr 1.2fr; gap: 20px; margin-top: 20px; }
@media (max-width: 900px) { .two-col { grid-template-columns: 1fr; } }

.panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 18px 20px;
}
.panel h2 { margin: 0 0 12px; font-size: 16px; letter-spacing: .5px; }

/* ---------- tuner ---------- */
.freq-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
#freq-display {
  font: 700 56px/1 "Consolas", "SF Mono", monospace; color: var(--accent);
  text-shadow: 0 0 18px rgba(55, 224, 255, .45);
}
#freq-display .unit { font-size: 20px; color: var(--sub); text-shadow: none; }
.freq-controls { display: flex; align-items: center; gap: 10px; }
.freq-controls input[type=number] {
  width: 110px; padding: 10px 12px; font-size: 18px; text-align: center;
  background: var(--panel2); color: var(--text); border: 1px solid var(--line); border-radius: 8px;
  font-family: "Consolas", monospace;
}
select, .freq-controls input:focus { outline: none; }
select {
  padding: 10px; background: var(--panel2); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px; font-size: 14px;
}
button {
  padding: 10px 20px; font-size: 15px; font-weight: 600; cursor: pointer;
  background: linear-gradient(135deg, var(--accent2), #4a3aff); color: white;
  border: none; border-radius: 8px; letter-spacing: .5px;
}
button:hover:not(:disabled) { filter: brightness(1.15); }
button:disabled { opacity: .4; cursor: default; }
button.ghost {
  background: transparent; border: 1px solid var(--line); color: var(--sub);
  padding: 7px 14px; font-size: 13px;
}
button.ghost:hover { color: var(--text); border-color: var(--sub); }
#stop-btn { background: linear-gradient(135deg, #b3384a, #7c2230); }

#spectrum { width: 100%; height: 180px; margin-top: 14px; border-radius: 8px; background: #0b1020; }

.status-row { display: flex; align-items: center; gap: 14px; margin-top: 12px; flex-wrap: wrap; }
.badge {
  display: inline-block; padding: 4px 12px; border-radius: 20px; font-size: 13px;
  background: var(--panel2); border: 1px solid var(--line); color: var(--sub);
}
.badge.ok { color: var(--ok); border-color: rgba(61, 220, 132, .5); }
.badge.warn { color: var(--warn); border-color: rgba(255, 200, 80, .5); }
.badge.err { color: var(--err); border-color: rgba(255, 93, 108, .5); }
.meter { flex: 1; max-width: 220px; height: 10px; background: var(--panel2); border-radius: 5px; overflow: hidden; border: 1px solid var(--line); }
.level-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--ok), var(--warn) 70%, var(--err)); transition: width 80ms linear; }
.vol { color: var(--sub); font-size: 13px; display: flex; align-items: center; gap: 8px; }

/* ---------- stations ---------- */
#station-list { list-style: none; margin: 0 0 14px; padding: 0; max-height: 300px; overflow-y: auto; }
#station-list li {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 12px; border-radius: 8px; cursor: pointer; border: 1px solid transparent;
}
#station-list li:hover { background: var(--panel2); border-color: var(--line); }
#station-list li .freq { font-family: "Consolas", monospace; color: var(--accent); font-weight: 600; }
#station-list li .meta { color: var(--sub); font-size: 12px; }
.station-form { display: grid; grid-template-columns: 1.4fr .7fr 1fr auto; gap: 8px; }
.station-form input {
  padding: 9px 10px; background: var(--panel2); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px; font-size: 14px; min-width: 0;
}
.station-form button { padding: 9px 16px; font-size: 14px; }

/* ---------- history / stats ---------- */
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); }
th { color: var(--sub); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .5px; }
td .st-active { color: var(--ok); } td .st-ended { color: var(--sub); } td .st-error { color: var(--err); }
.stats { font-size: 13px; color: var(--sub); display: grid; gap: 6px; }
.stats b { color: var(--text); }

/* ---------- toast ---------- */
#toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--panel); border: 1px solid var(--line); color: var(--text);
  padding: 12px 22px; border-radius: 10px; font-size: 14px; opacity: 0;
  pointer-events: none; transition: opacity .25s; z-index: 50; max-width: 80vw;
}
#toast.show { opacity: 1; }
#toast.err { border-color: var(--err); color: var(--err); }