:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --text: #14151a;
  --text-muted: #6b6f7b;
  --accent: #2563eb;
  --accent-contrast: #ffffff;
  --border: #e3e4e8;
  --danger: #e0263f;
  --ok: #1fa463;
  --warn: #d98c00;
}
:root[data-theme="dark"] {
  --bg: #0d0e12;
  --surface: #17181e;
  --text: #f3f4f6;
  --text-muted: #9599a6;
  --accent: #4f8cff;
  --accent-contrast: #061024;
  --border: #262832;
  --danger: #ff3b56;
  --ok: #35d07f;
  --warn: #ffb648;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
}

/* Elements using [hidden] must actually disappear, even though .login-wrap
   and other classes below set an explicit "display" (author CSS otherwise
   overrides the browser's default [hidden]{display:none} rule). Without
   this, the login screen stayed visible and the panel got appended below
   it, forcing a scroll to reach the controls after logging in. */
[hidden] { display: none !important; }

.muted { color: var(--text-muted); font-weight: 400; }

/* ---- Login ---- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.login-card h1 { margin: 0; font-size: 22px; }
.login-card .subtitle { margin: -8px 0 4px; color: var(--text-muted); font-size: 13px; }
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--text-muted); font-weight: 600; }
.login-card input {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}
.form-error { color: var(--danger); font-size: 13px; font-weight: 600; }

/* ---- Panel layout ---- */
.panel { max-width: 960px; margin: 0 auto; padding: 24px 20px 60px; }
.panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 10px;
}
.panel__header h1 { font-size: 20px; margin: 0; }
.header-actions { display: flex; align-items: center; gap: 10px; }

.icon-btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  width: 38px;
  height: 38px;
  border-radius: 12px;
  cursor: pointer;
}
:root:not([data-theme="dark"]) .icon-moon { display: none; }
:root[data-theme="dark"] .icon-sun { display: none; }

.warnings {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}
.warning {
  padding: 10px 14px;
  border-radius: 10px;
  background: rgba(217,140,0,0.12);
  color: var(--warn);
  font-size: 13px;
  font-weight: 600;
}
.warning--danger { background: rgba(224,38,63,0.12); color: var(--danger); }

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.card h2 { margin: 0 0 4px; font-size: 15px; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.card-head h2 { margin: 0; }

.field-row { display: flex; gap: 8px; align-items: center; }
.field-row--between { justify-content: space-between; }

select, input[type="text"] {
  flex: 1;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}
label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--text-muted); font-weight: 600; }

.btn {
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}
.btn--primary { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }
.btn--ghost { background: transparent; }
.btn--danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.meter-block { display: flex; flex-direction: column; gap: 8px; }
.meter { display: flex; align-items: center; gap: 8px; }
.meter__ch { width: 14px; font-size: 12px; font-weight: 700; color: var(--text-muted); }
.meter__bar {
  flex: 1;
  height: 14px;
  border-radius: 7px;
  background: var(--bg);
  border: 1px solid var(--border);
  overflow: hidden;
}
.meter__fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--ok), var(--warn) 80%, var(--danger) 95%);
  transition: width 0.05s linear;
}
.signal-state { font-size: 12px; font-weight: 700; color: var(--text-muted); }
.signal-state.state-ok { color: var(--ok); }
.signal-state.state-clip { color: var(--danger); }
.signal-state.state-none { color: var(--text-muted); }

.gain-block input[type="range"] { width: 100%; accent-color: var(--accent); }

.broadcast-actions { display: flex; gap: 10px; }
.broadcast-actions .btn { flex: 1; }

.mute-btn {
  border: 2px solid var(--danger);
  background: transparent;
  color: var(--danger);
  font-weight: 800;
  letter-spacing: 0.04em;
  padding: 12px;
  border-radius: 12px;
  cursor: pointer;
}
.mute-btn[aria-pressed="true"] {
  background: var(--danger);
  color: #fff;
}

.broadcast-state { font-size: 13px; font-weight: 700; color: var(--text-muted); }
.broadcast-state.is-live { color: var(--ok); }

.hint { font-size: 12px; color: var(--text-muted); margin: 0; }

.segmented { display: flex; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.segmented--full .segmented__btn { flex: 1; }
.segmented__btn {
  border: none;
  background: var(--bg);
  color: var(--text-muted);
  padding: 10px 8px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}
.segmented__btn.is-active { background: var(--accent); color: var(--accent-contrast); }

.save-confirm { color: var(--ok); font-size: 13px; font-weight: 700; }

.diagnostics-card { grid-column: 1 / -1; }
.diag-updated { font-size: 12px; color: var(--text-muted); font-weight: 700; }
.diag-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
@media (max-width: 720px) {
  .diag-grid { grid-template-columns: 1fr 1fr; }
}
.diag-item {
  min-height: 68px;
  border: 1px solid var(--border);
  background: var(--bg);
  border-radius: 12px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 8px;
}
.diag-item span { color: var(--text-muted); font-size: 12px; font-weight: 700; }
.diag-item strong { font-size: 16px; line-height: 1.1; }
.diag-item strong.is-good { color: var(--ok); }
.diag-item strong.is-bad { color: var(--danger); }
.diag-log {
  min-height: 70px;
  max-height: 150px;
  overflow: auto;
  margin: 0;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.4;
  white-space: pre-wrap;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 1000;
}
.modal-card {
  width: 100%;
  max-width: 360px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}
.modal-message {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
}
.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}
.modal-actions .btn { flex: 0 0 auto; }