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

:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --bg3: #21262d;
  --border: #30363d;
  --accent: #00e5ff;
  --accent-dim: #0090a3;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --red: #f85149;
  --green: #3fb950;
  --orange: #ff6600;
  --font-mono: 'Courier New', Courier, monospace;
}

body {
  background: linear-gradient(135deg, #e8f4fd 0%, #f0f9ff 60%, #e0f2f1 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  height: 100vh;
  display: grid;
  grid-template-columns: 270px 1fr;
  grid-template-rows: 48px calc(100vh - 48px);
  overflow: hidden;
}

/* ── Pardis Tech Navbar ──────────────────────────────────── */
.pt-nav {
  grid-column: 1 / -1;
  height: 48px;
  background: #0a0e14;
  border-bottom: 1px solid #1a2535;
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 10px;
  flex-shrink: 0;
}

.pt-nav-brand {
  display: flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
  color: var(--text);
}

.pt-nav-brand img {
  height: 26px;
  width: auto;
}

.pt-nav-brand span {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.01em;
}

.pt-nav-back {
  margin-left: auto;
  font-size: 0.78rem;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.15s;
}

.pt-nav-back:hover { color: var(--accent); }

/* ── LEFT PANEL ─────────────────────────────────────── */
#control-panel {
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 1px;
  overflow-y: auto;
}

.section {
  background: var(--bg2);
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 10px;
}

/* Connection */
.connect-row {
  display: flex;
  gap: 6px;
  align-items: center;
}

select {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 5px 8px;
  font-size: 13px;
  flex: 1;
}

.status-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

#status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-dim);
  flex-shrink: 0;
  transition: background 0.3s;
}

#status-dot.connected { background: var(--green); }
#status-dot.error { background: var(--red); }

#status-text { color: var(--text-dim); font-size: 12px; }

/* Position display */
.pos-grid {
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: 4px 8px;
  align-items: center;
  font-family: var(--font-mono);
}

.pos-label { color: var(--accent); font-size: 12px; }
.pos-value { font-size: 18px; font-weight: 600; letter-spacing: 0.05em; }
.pos-unit  { color: var(--text-dim); font-size: 11px; display: inline-block; margin-left: 4px; }

/* Buttons */
button {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  white-space: nowrap;
}
button:hover { background: #2d333b; border-color: #6e7681; }
button:active { background: #1c2128; }
button:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: #000;
  font-weight: 600;
}
.btn-primary:hover { background: var(--accent); }
.btn-primary.connected {
  background: #3a1f1f;
  border-color: var(--red);
  color: var(--red);
}
.btn-primary.connected:hover { background: #5a2828; }

.btn-home {
  width: 100%;
  padding: 8px;
  font-size: 14px;
  font-weight: 600;
  background: #1a2a1a;
  border-color: var(--green);
  color: var(--green);
}
.btn-home:hover { background: #223322; }

/* Jog controls */
.jog-step-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.jog-step-row label { color: var(--text-dim); font-size: 12px; }

.jog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  margin-bottom: 8px;
}

.jog-btn {
  aspect-ratio: 1;
  font-size: 16px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.jog-btn.center { background: transparent; border-color: transparent; cursor: default; }
.jog-btn.center:hover { background: transparent; border-color: transparent; }

.z-jog-row {
  display: flex;
  gap: 4px;
}
.z-jog-row button { flex: 1; font-size: 12px; }

/* Go-to form */
.goto-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 8px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.input-group label { font-size: 11px; color: var(--accent); font-family: var(--font-mono); }

input[type="number"], input[type="text"] {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 5px 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  width: 100%;
}
input[type="number"]:focus, input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
}

/* Print upload */
.print-api-group { margin-bottom: 8px; }

.file-picker {
  display: block;
  width: 100%;
  padding: 8px;
  margin-bottom: 8px;
  text-align: center;
  background: var(--bg3);
  border: 1px dashed var(--border);
  color: var(--text);
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-picker:hover { border-color: var(--accent); color: var(--accent); }
.file-picker input { display: none; }

.btn-print {
  width: 100%;
  background: #2c2540;
  border-color: #8b5cf6;
  color: #f5f0ff;
  font-weight: 600;
}
.btn-print:hover { background: #3a2f57; border-color: #a78bfa; }

.print-status {
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.4;
  overflow-wrap: anywhere;
}
.print-status.error { color: var(--red); }

.print-summary {
  margin-top: 6px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
}

/* ── RIGHT PANEL ─────────────────────────────────────── */
#right-panel {
  display: grid;
  grid-template-rows: 1fr 220px;
  overflow: hidden;
}

#vis-container {
  position: relative;
  background: var(--bg);
  overflow: hidden;
}

#vis-container canvas { display: block; }

#vis-label {
  position: absolute;
  top: 10px;
  left: 10px;
  font-size: 11px;
  color: var(--text-dim);
  background: rgba(0,0,0,0.5);
  padding: 4px 8px;
  border-radius: 4px;
  pointer-events: none;
}

#print-vis-label {
  position: absolute;
  right: 10px;
  top: 10px;
  font-size: 11px;
  color: var(--text-dim);
  background: rgba(0,0,0,0.5);
  padding: 4px 8px;
  border-radius: 4px;
  pointer-events: none;
}

/* Console */
#console-panel {
  background: var(--bg);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#console-header {
  padding: 6px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-dim);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#console-output {
  flex: 1;
  overflow-y: auto;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
}

#console-output::-webkit-scrollbar { width: 6px; }
#console-output::-webkit-scrollbar-track { background: transparent; }
#console-output::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.log-send { color: var(--accent); }
.log-recv { color: var(--text-dim); }
.log-recv.ok { color: var(--green); }
.log-info { color: var(--orange); font-style: italic; }

#btn-clear-console {
  font-size: 11px;
  padding: 2px 8px;
  background: transparent;
  border-color: var(--border);
}

/* Feedrate row */
.feedrate-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.feedrate-row label { color: var(--text-dim); font-size: 12px; white-space: nowrap; }
.feedrate-row input { flex: 1; }

/* No-serial banner */
#no-serial-banner {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  background: var(--red);
  color: #fff;
  text-align: center;
  padding: 10px;
  font-weight: 600;
  z-index: 100;
}

/* Language toggle bar */
.lang-bar {
  padding: 8px 14px 0;
}

#btn-lang {
  display: block;
  width: 100%;
  padding: 4px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 11px;
  border-radius: 4px;
  font-family: inherit;
}
#btn-lang:hover { border-color: var(--accent); color: var(--accent); }

/* Firmware download button */
.btn-download {
  display: block;
  width: 100%;
  padding: 8px;
  text-align: center;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--accent);
  border-radius: 4px;
  text-decoration: none;
  font-size: 13px;
  transition: border-color 0.15s, background 0.15s;
}
.btn-download:hover { border-color: var(--accent); background: rgba(0,229,255,0.07); }

/* RTL support */
[dir="rtl"] #control-panel { text-align: right; }
[dir="rtl"] .connect-row   { flex-direction: row-reverse; }
[dir="rtl"] .jog-step-row  { flex-direction: row-reverse; }
[dir="rtl"] .status-row    { flex-direction: row-reverse; }
[dir="rtl"] #console-header { flex-direction: row-reverse; }