:root {
  --bg: #0f1419;
  --card: #171f29;
  --card-2: #1d2733;
  --line: #2a3744;
  --text: #e8eef4;
  --muted: #8aa0b2;
  --accent: #1fd28a;      /* pickleball green */
  --accent-2: #14a86c;
  --warn: #f0b429;
  --danger: #ef5350;
  --radius: 14px;
  --maxw: 620px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: radial-gradient(1200px 600px at 50% -10%, #1a2632 0%, var(--bg) 55%);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 32px 20px 60px; }

.top { text-align: center; margin-bottom: 26px; }
.brand {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 700; letter-spacing: .02em; color: var(--text);
  text-transform: uppercase; font-size: 13px; opacity: .9;
}
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.top h1 { font-size: 26px; margin: 12px 0 6px; }
.top .sub { color: var(--muted); margin: 0; font-size: 15px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  margin: 14px 0;
}
.card.disabled { opacity: .45; pointer-events: none; }
.card-head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.card-head h2 { font-size: 17px; margin: 0; flex: 1; }
.step {
  display: inline-grid; place-items: center;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--card-2); border: 1px solid var(--line);
  font-size: 13px; font-weight: 700; color: var(--accent);
}
.card p { color: var(--muted); font-size: 14px; line-height: 1.5; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }

.card.warn { border-color: var(--warn); background: #221d10; }
.card.warn h2 { color: var(--warn); }
.card.warn p { color: #e9d8a6; }

.btn {
  appearance: none; border: 1px solid var(--line);
  background: var(--card-2); color: var(--text);
  padding: 11px 16px; border-radius: 10px; font-size: 14.5px; font-weight: 600;
  cursor: pointer; transition: transform .05s ease, background .15s ease, opacity .15s; margin-top: 6px;
}
.btn:hover { background: #243140; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn.primary { background: linear-gradient(180deg, var(--accent), var(--accent-2)); border-color: transparent; color: #04130c; }
.btn.primary:hover { filter: brightness(1.05); }
.btn.ghost { background: transparent; }
.btn.small { padding: 6px 12px; font-size: 13px; margin: 0; }

.field { display: block; margin: 12px 0; }
.field span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.field input {
  width: 100%; padding: 11px 12px; border-radius: 10px;
  border: 1px solid var(--line); background: #0e151c; color: var(--text); font-size: 15px;
}
.field input:focus { outline: none; border-color: var(--accent); }

.device { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 12px; }
.kv { display: flex; justify-content: space-between; gap: 12px; padding: 6px 0; font-size: 14px; }
.kv span { color: var(--muted); }
.kv b { font-weight: 600; text-align: right; }
.kv b.ok { color: var(--accent); }
.kv b.bad { color: var(--danger); }

.versions, .actions { display: flex; flex-direction: column; gap: 0; }
.actions { flex-direction: row; gap: 10px; margin-top: 14px; }
.actions .btn { flex: 1; }

.progress-wrap { margin-top: 18px; }
.progress { height: 12px; background: #0e151c; border-radius: 999px; overflow: hidden; border: 1px solid var(--line); }
.bar { height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent-2), var(--accent)); transition: width .3s ease; }
.progress-meta { display: flex; justify-content: space-between; margin-top: 8px; font-size: 13.5px; }
#progress-pct { font-variant-numeric: tabular-nums; font-weight: 700; }

.log-card .card-head { justify-content: space-between; }
.log {
  background: #0b1117; border: 1px solid var(--line); border-radius: 10px;
  padding: 12px; font-size: 12.5px; line-height: 1.55; color: #b9cad9;
  max-height: 220px; overflow: auto; white-space: pre-wrap; word-break: break-word; margin: 0;
  font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
}

.foot { display: flex; justify-content: space-between; align-items: center; margin-top: 24px; font-size: 12.5px; color: var(--muted); }

.tabs {
  display: flex; gap: 6px; padding: 5px;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; margin: 14px 0 4px;
}
.tab {
  flex: 1; appearance: none; border: none; background: transparent; color: var(--muted);
  padding: 10px 14px; border-radius: 9px; font-size: 14.5px; font-weight: 600; cursor: pointer;
  transition: background .15s, color .15s;
}
.tab:hover { color: var(--text); }
.tab.active { background: var(--card-2); color: var(--accent); box-shadow: inset 0 0 0 1px var(--line); }

.hidden { display: none !important; }

@media (max-width: 480px) {
  .actions { flex-direction: column; }
  .top h1 { font-size: 22px; }
}