:root {
  --bg: #0a0e14;
  --surface: #111820;
  --surface2: #1a2332;
  --border: #243044;
  --text: #e8edf4;
  --muted: #7a8ba3;
  --accent: #00d4aa;
  --accent-dim: #00a888;
  --warn: #f5a623;
  --error: #ff4757;
  --success: #2ed573;
  --info: #3498db;
  --radius: 10px;
  --font: 'Vazirmatn', system-ui, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

input,
textarea,
select,
[data-allow-select] {
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
}

img,
svg {
  -webkit-user-drag: none;
  user-drag: none;
  pointer-events: none;
}

button svg {
  pointer-events: none;
}

.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  gap: 1.25rem;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.brand { display: flex; align-items: center; gap: 1rem; }

.brand-icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--accent), #0088cc);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
}

.brand-icon svg { width: 28px; height: 28px; }

.brand h1 { font-size: 1.25rem; font-weight: 700; }
.brand p { font-size: 0.8rem; color: var(--muted); }

.header-actions { display: flex; align-items: center; gap: 0.75rem; }

.agent-status {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.4rem 0.85rem;
  background: var(--surface2);
  border-radius: 20px;
  font-size: 0.85rem;
}

.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--error);
  box-shadow: 0 0 6px var(--error);
}
.status-dot.online {
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
  animation: pulse 2s infinite;
}
.status-dot.offline { background: var(--error); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Buttons */
.btn {
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface2);
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.15s;
}
.btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0a0e14;
  font-weight: 600;
}
.btn-primary:hover:not(:disabled) { background: var(--accent-dim); border-color: var(--accent-dim); color: #0a0e14; }
.btn-danger { background: transparent; border-color: var(--error); color: var(--error); }
.btn-danger:hover:not(:disabled) { background: var(--error); color: #fff; }
.btn-ghost { background: transparent; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 0.95rem; }
.btn-sm { padding: 0.3rem 0.7rem; font-size: 0.78rem; }

/* Panels */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}

.panel h2 { font-size: 1rem; font-weight: 600; margin-bottom: 1rem; }
.panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.panel-head h2 { margin-bottom: 0; }
.stats-note { font-size: 0.75rem; color: var(--muted); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.stat-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 3px;
  background: var(--accent);
  opacity: 0.7;
}

.stat-card.stat-month::before { background: var(--info); }
.stat-card.stat-year::before { background: var(--warn); }

.stat-value {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.stat-card.stat-month .stat-value { color: var(--info); }
.stat-card.stat-year .stat-value { color: var(--warn); }

.stat-label {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.stat-period {
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .stats-grid { grid-template-columns: 1fr; }
  .stats-panel .panel-head { flex-direction: column; align-items: flex-start; gap: 0.35rem; }
}

.main { display: flex; flex-direction: column; gap: 1.25rem; flex: 1; }

/* Firmware */
.firmware-row { display: grid; grid-template-columns: 1fr 280px; gap: 1.25rem; }

@media (max-width: 768px) {
  .firmware-row { grid-template-columns: 1fr; }
}

.file-drop {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.file-drop:hover, .file-drop.dragover {
  border-color: var(--accent);
  background: rgba(0, 212, 170, 0.05);
}
.file-drop-inner {
  padding: 2rem;
  text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  color: var(--muted);
}
.file-hint { font-size: 0.82rem; color: var(--accent); font-weight: 500; }

.firmware-meta { display: flex; flex-direction: column; gap: 0.5rem; }
.firmware-meta label { font-size: 0.78rem; color: var(--muted); }
.firmware-meta input, .firmware-meta select {
  font-family: var(--font);
  padding: 0.5rem 0.75rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.85rem;
}
.firmware-meta input:focus, .firmware-meta select:focus {
  outline: none; border-color: var(--accent);
}

.action-bar { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.25rem; }

/* Ports Grid */
.port-count { font-size: 0.82rem; color: var(--muted); }

.ports-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.85rem;
}

.port-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: border-color 0.2s;
}
.port-card.active { border-color: var(--accent); }
.port-card.error { border-color: var(--error); }
.port-card.success { border-color: var(--success); }
.port-card.flashing { border-color: var(--warn); animation: flash-border 1s infinite; }

@keyframes flash-border {
  0%, 100% { border-color: var(--warn); }
  50% { border-color: transparent; }
}

.port-header { display: flex; align-items: center; justify-content: space-between; }
.port-name { font-weight: 600; font-size: 0.95rem; }
.port-badge {
  font-size: 0.72rem;
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
  font-weight: 500;
}
.badge-idle { background: #243044; color: var(--muted); }
.badge-connected { background: rgba(46,213,115,0.15); color: var(--success); }
.badge-flashing { background: rgba(245,166,35,0.15); color: var(--warn); }
.badge-success { background: rgba(46,213,115,0.2); color: var(--success); }
.badge-error { background: rgba(255,71,87,0.15); color: var(--error); }
.badge-retry { background: rgba(52,152,219,0.15); color: var(--info); }

.port-info { font-size: 0.78rem; color: var(--muted); }
.port-progress { height: 4px; background: var(--border); border-radius: 2px; overflow: hidden; }
.port-progress-bar { height: 100%; background: var(--accent); border-radius: 2px; transition: width 0.3s; width: 0%; }
.port-actions { display: flex; gap: 0.4rem; margin-top: 0.25rem; }
.port-actions .btn { flex: 1; justify-content: center; font-size: 0.78rem; padding: 0.35rem 0.5rem; }

/* Log */
.log-box {
  background: #060a0f;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.85rem;
  height: 200px;
  overflow-y: auto;
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.78rem;
  direction: ltr;
  text-align: left;
}
.log-line { padding: 0.15rem 0; border-bottom: 1px solid rgba(36,48,68,0.5); }
.log-line .time { color: var(--muted); margin-right: 0.5rem; }
.log-line.info { color: var(--info); }
.log-line.success { color: var(--success); }
.log-line.error { color: var(--error); }
.log-line.warn { color: var(--warn); }

/* Footer */
.footer {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--muted);
  padding: 0.5rem 0;
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 1000;
}
.toast {
  padding: 0.75rem 1.25rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.85rem;
  animation: slideUp 0.3s ease;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--error); }

@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Empty state */
.empty-ports {
  grid-column: 1 / -1;
  text-align: center;
  padding: 2.5rem;
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}