:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1c232c;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #1f6feb;
  --accent-hover: #388bfd;
  --danger: #f85149;
  --ok: #3fb950;
  --warn: #d29922;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f8fa;
    --panel: #ffffff;
    --panel-2: #f0f3f6;
    --border: #d0d7de;
    --text: #1f2328;
    --muted: #59636e;
  }
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN",
               "Yu Gothic UI", Meiryo, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  padding-bottom: 48px;
}

/* ---- Top bar ---- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 16px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.brand {
  font-weight: 700; font-size: 18px;
  color: var(--text); text-decoration: none;
}
.nav {
  display: flex; gap: 4px; flex-wrap: wrap;
}
.nav a {
  padding: 6px 12px; border-radius: 6px;
  color: var(--muted); text-decoration: none;
  font-size: 14px;
}
.nav a:hover { background: var(--panel-2); color: var(--text); }
.nav a.active { background: var(--accent); color: #fff; }

.user-area {
  margin-left: auto; display: flex; align-items: center; gap: 10px;
  font-size: 13px; color: var(--muted);
}

/* ---- Footer ---- */
.footbar {
  position: fixed; bottom: 0; left: 0; right: 0;
  padding: 6px 16px;
  background: var(--panel);
  border-top: 1px solid var(--border);
  font-size: 12px; color: var(--muted);
  display: flex; justify-content: flex-end;
}

/* ---- Main ---- */
main {
  max-width: 1100px; margin: 0 auto;
  padding: 16px;
}
.loading {
  padding: 40px; text-align: center; color: var(--muted);
}

h1 { font-size: 22px; margin: 0 0 12px; }
h2 { font-size: 17px; margin: 18px 0 8px; }

/* ---- Buttons ---- */
button, .btn {
  cursor: pointer;
  padding: 6px 14px;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
}
button:hover, .btn:hover { background: var(--border); }
button.primary, .btn.primary {
  background: var(--accent); border-color: var(--accent); color: #fff;
}
button.primary:hover { background: var(--accent-hover); }
button.danger { background: var(--danger); border-color: var(--danger); color: #fff; }

/* ---- Cards / lists ---- */
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 12px;
}
.card-row {
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; flex-wrap: wrap;
}
.badge {
  display: inline-block; padding: 2px 8px;
  border-radius: 999px;
  background: var(--panel-2); border: 1px solid var(--border);
  font-size: 12px; color: var(--muted);
}
.badge.ok    { background: rgba(63,185,80,.15);  color: var(--ok);     border-color: rgba(63,185,80,.35); }
.badge.warn  { background: rgba(210,153,34,.15); color: var(--warn);   border-color: rgba(210,153,34,.35); }
.badge.danger{ background: rgba(248,81,73,.15);  color: var(--danger); border-color: rgba(248,81,73,.35); }

.muted { color: var(--muted); font-size: 13px; }
.code { font-family: ui-monospace, Consolas, monospace; font-size: 13px; }

/* ---- Forms ---- */
.form-grid {
  display: grid; grid-template-columns: 140px 1fr; gap: 8px 12px;
  align-items: center;
}
.form-grid label { color: var(--muted); font-size: 13px; }
.form-grid input, .form-grid select, .form-grid textarea {
  width: 100%;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 6px 8px; font-size: 14px; font-family: inherit;
}
.form-grid textarea { min-height: 60px; resize: vertical; }
.form-actions { display: flex; gap: 8px; margin-top: 12px; justify-content: flex-end; }

/* ---- Toolbar ---- */
.toolbar {
  display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap;
  align-items: center;
}
.toolbar .spacer { flex: 1; }
.toolbar input[type="search"] {
  min-width: 200px;
  background: var(--panel); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 6px 10px; font-size: 14px; font-family: inherit;
}

/* ---- Dashboard ---- */
.device-card { margin-bottom: 12px; }
.slot-list { margin-top: 8px; }
.slot {
  padding: 8px 10px; margin: 4px 0;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  display: flex; justify-content: space-between; align-items: center;
  gap: 8px;
}
.slot.empty { color: var(--muted); font-style: italic; }

/* ---- Modal ---- */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.55);
  z-index: 50;
  display: flex; align-items: center; justify-content: center;
  padding: 16px;
}
.modal {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  width: 100%; max-width: 520px;
  max-height: 90vh; overflow-y: auto;
}

/* ---- Utility ---- */
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.grow { flex: 1; }
.hidden { display: none !important; }

/* ---- Auth gate ---- */
.auth-gate {
  max-width: 420px; margin: 60px auto;
  text-align: center;
  padding: 30px;
}
.auth-gate h1 { font-size: 28px; margin-bottom: 8px; }
.auth-gate p { color: var(--muted); margin-bottom: 20px; }

/* ---- Config warning ---- */
.config-warning {
  max-width: 700px; margin: 40px auto;
  padding: 20px;
  background: rgba(210,153,34,.1);
  border: 1px solid rgba(210,153,34,.4);
  border-radius: 8px;
}
.config-warning h1 { color: var(--warn); }
.config-warning pre {
  background: var(--panel-2); padding: 12px; border-radius: 6px;
  overflow-x: auto; font-size: 13px;
}