@font-face {
  font-family: 'JetBrains Mono';
  src: url('fonts/JetBrainsMono-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'JetBrains Mono';
  src: url('fonts/JetBrainsMono-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0c0c0c;
  --bg2: #141414;
  --border: #252525;
  --text: #888;
  --bright: #ccc;
  --green: #39ff14;
  --green-d: #1a7a0a;
  --cyan: #00d4ee;
  --cyan-d: #006a77;
  --red: #ff4040;
  --red-d: #7a1a1a;
  --yellow: #eebb00;
  --yellow-d: #7a6a00;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.5;
}

.hidden { display: none !important; }

/* ── SCREEN ── */
.screen {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px 20px;
}

/* ── HEADER ── */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}
.title {
  font-weight: 700;
  font-size: 16px;
  color: var(--cyan);
  letter-spacing: 3px;
}
.status {
  font-size: 12px;
  font-weight: 700;
  color: var(--red);
}
.status.online {
  color: var(--green);
}

/* ── CONNECTION BAR ── */
.conn-bar {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.conn-bar select {
  min-width: 0;
}

/* ── INPUTS ── */
select, input[type="number"] {
  background: var(--bg2);
  color: var(--bright);
  border: 1px solid var(--border);
  padding: 7px 10px;
  font-family: inherit;
  font-size: 12px;
  outline: none;
}
select:focus, input:focus {
  border-color: var(--cyan);
}

/* ── BUTTONS ── */
.btn {
  background: var(--bg2);
  color: var(--bright);
  border: 1px solid var(--border);
  padding: 7px 16px;
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  letter-spacing: 1px;
  white-space: nowrap;
  transition: background 0.12s, color 0.12s;
}
.btn:hover:not(:disabled) { background: #222; }
.btn:active:not(:disabled) { transform: scale(0.97); }
.btn:disabled { opacity: 0.25; cursor: not-allowed; }

.btn-sm { padding: 5px 12px; font-size: 11px; }

.btn-green { border-color: var(--green-d); color: var(--green); }
.btn-green:hover:not(:disabled) { background: var(--green-d); color: #fff; }

.btn-red { border-color: var(--red-d); color: var(--red); }
.btn-red:hover:not(:disabled) { background: var(--red-d); color: #fff; }

.btn-cyan { border-color: var(--cyan-d); color: var(--cyan); }
.btn-cyan:hover:not(:disabled) { background: var(--cyan-d); color: #fff; }

.btn-yellow { border-color: var(--yellow-d); color: var(--yellow); }
.btn-yellow:hover:not(:disabled) { background: var(--yellow-d); color: #fff; }

/* ── TOAST ── */
.toast {
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  border: 1px solid var(--border);
}
.toast.ok { color: var(--green); border-color: var(--green-d); }
.toast.error { color: var(--red); border-color: var(--red-d); }

/* ── SIGNAL BAR ── */
.signal-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
  font-size: 13px;
}
.signal-bar strong {
  color: var(--bright);
}

/* ── 2x2 GRID ── */
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}

.card {
  border: 1px solid var(--border);
  background: var(--bg2);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-title {
  font-weight: 700;
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: 2px;
}

.card-current {
  font-size: 12px;
  color: var(--text);
}
.card-current strong {
  color: var(--bright);
}

.card-control {
  display: flex;
  gap: 8px;
  align-items: center;
}
.card-control select,
.card-control input {
  flex: 1;
  min-width: 0;
}

.card-body-sys {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
  justify-content: center;
}
.card-body-sys .btn {
  width: 100%;
}

/* ── LOG ── */
.log-wrap {
  border: 1px solid var(--border);
}
.log-toggle {
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  letter-spacing: 2px;
  background: var(--bg2);
  user-select: none;
}
.log-toggle:hover { color: var(--bright); }

.log-body {
  max-height: 200px;
  overflow-y: auto;
  padding: 8px 14px;
  font-size: 11px;
  line-height: 1.8;
  background: var(--bg);
}
.log-body::-webkit-scrollbar { width: 4px; }
.log-body::-webkit-scrollbar-thumb { background: var(--border); }

.log-line { white-space: pre-wrap; word-break: break-all; }
.log-info { color: var(--cyan); }
.log-error { color: var(--red); }

/* ── LOGIN ── */
.login-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.login-box {
  width: 320px;
  border: 1px solid var(--border);
  background: var(--bg2);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.login-title {
  font-weight: 700;
  font-size: 18px;
  color: var(--cyan);
  letter-spacing: 4px;
  text-align: center;
}

.login-subtitle {
  font-size: 11px;
  color: var(--text);
  letter-spacing: 3px;
  text-align: center;
  margin-bottom: 6px;
}

.login-box input {
  background: var(--bg);
  color: var(--bright);
  border: 1px solid var(--border);
  padding: 10px 12px;
  font-family: inherit;
  font-size: 13px;
  outline: none;
  width: 100%;
  box-sizing: border-box;
}
.login-box input:focus {
  border-color: var(--cyan);
}

.login-btn {
  width: 100%;
  padding: 10px;
  font-size: 13px;
  letter-spacing: 2px;
}

.login-error {
  font-size: 12px;
  color: var(--red);
  text-align: center;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ── RESPONSIVE ── */
@media (max-width: 600px) {
  .screen { padding: 10px; }
  .grid { grid-template-columns: 1fr; }
  .conn-bar { flex-wrap: wrap; }
}