:root {
  --bg: #0d0d0d;
  --bg2: #141414;
  --bg3: #1a1a1a;
  --border: #2a2a2a;
  --text: #e0e0e0;
  --text-dim: #666;
  --accent: #00ff88;
  --accent-dim: #00aa55;
  --accent-glow: rgba(0, 255, 136, 0.15);
  --danger: #ff4444;
  --warning: #ffaa00;
  --scrollbar: #2a2a2a;
  --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  --radius: 6px;
}
[data-theme="cyan"] {
  --accent: #00d4ff; --accent-dim: #0099cc; --accent-glow: rgba(0,212,255,0.15);
}
[data-theme="amber"] {
  --accent: #ffaa00; --accent-dim: #cc8800; --accent-glow: rgba(255,170,0,0.15);
}
[data-theme="pink"] {
  --accent: #ff66cc; --accent-dim: #cc44aa; --accent-glow: rgba(255,102,204,0.15);
}
[data-theme="white"] {
  --accent: #ffffff; --accent-dim: #aaaaaa; --accent-glow: rgba(255,255,255,0.1);
}

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

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13px;
  overflow: hidden;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ── HEADER ── */
#header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 14px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 160px;
}

.app-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 1px;
  text-shadow: 0 0 8px var(--accent-glow);
  white-space: nowrap;
}

.theme-picker {
  display: flex;
  gap: 5px;
}
.theme-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.2s, transform 0.2s;
}
.theme-dot:hover { transform: scale(1.3); }
.theme-dot[data-theme="green"]  { background: #00ff88; }
.theme-dot[data-theme="cyan"]   { background: #00d4ff; }
.theme-dot[data-theme="amber"]  { background: #ffaa00; }
.theme-dot[data-theme="pink"]   { background: #ff66cc; }
.theme-dot[data-theme="white"]  { background: #ffffff; }
.theme-dot.active { border-color: var(--text); }

.header-center { display: flex; align-items: center; gap: 8px; flex: 1; justify-content: center; }
.header-right  { display: flex; align-items: center; gap: 6px; }

/* Port group */
.port-group { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }

.select-wrapper {
  position: relative;
  display: inline-flex;
  align-items: center;
}
.select-wrapper::after {
  content: '▾';
  position: absolute;
  right: 8px;
  pointer-events: none;
  color: var(--accent);
  font-size: 11px;
}
select {
  appearance: none;
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 5px 24px 5px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s;
}
select:hover, select:focus { border-color: var(--accent); }
.select-wrapper.small select { padding: 5px 20px 5px 8px; font-size: 11px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.btn svg { width: 14px; height: 14px; flex-shrink: 0; }
.btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); }
.btn:active { transform: scale(0.96); }

.btn-icon { padding: 5px 10px; }

.btn-connect {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 700;
}
.btn-connect:hover { background: var(--accent); color: #000; }
.btn-connect.connected { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-connect.connected:hover { background: #ff6666; }

.btn-connect.connecting {
  animation: blink 0.7s infinite;
  border-color: var(--warning);
  color: var(--warning);
  background: rgba(255,170,0,0.1);
}

.btn.paused { border-color: var(--warning); color: var(--warning); }

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ── STATUS BAR ── */
#statusBar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 3px 14px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-dim);
  flex-shrink: 0;
}
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.status-dot.disconnected { background: #444; }
.status-dot.connecting   { background: var(--warning); animation: blink 0.7s infinite; }
.status-dot.connected    { background: var(--accent); box-shadow: 0 0 6px var(--accent); }
.status-dot.error        { background: var(--danger); }

.line-count, .byte-count { margin-left: auto; }
.byte-count { margin-left: 0; }

.badge {
  padding: 1px 7px;
  border-radius: 20px;
  border: 1px solid var(--border);
  font-size: 10px;
  letter-spacing: 0.5px;
}
.badge.active { border-color: var(--accent); color: var(--accent); }

/* ── TERMINAL ── */
#terminal {
  flex: 1;
  overflow: hidden;
  position: relative;
  background: var(--bg);
}
#terminalInner {
  height: 100%;
  overflow-y: auto;
  overflow-x: auto;
  padding: 8px 14px;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar) transparent;
}
#terminalInner::-webkit-scrollbar { width: 6px; height: 6px; }
#terminalInner::-webkit-scrollbar-track { background: transparent; }
#terminalInner::-webkit-scrollbar-thumb { background: var(--scrollbar); border-radius: 3px; }
#terminalInner::-webkit-scrollbar-thumb:hover { background: var(--accent-dim); }

#terminalContent {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-height: 100%;
}

.log-line {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  padding: 1px 0;
  border-radius: 3px;
  animation: fadeIn 0.1s ease;
}
.log-line:hover { background: var(--bg3); }

@keyframes fadeIn { from { opacity: 0; transform: translateY(2px); } to { opacity: 1; } }

.log-time {
  color: var(--text-dim);
  font-size: 10px;
  min-width: 80px;
  flex-shrink: 0;
  user-select: none;
}
.log-index {
  color: var(--accent-dim);
  font-size: 10px;
  min-width: 48px;
  text-align: right;
  flex-shrink: 0;
  user-select: none;
}
.log-text {
  color: var(--accent);
  word-break: break-all;
  white-space: pre-wrap;
}
.log-line.sys .log-text  { color: var(--text-dim); font-style: italic; }
.log-line.err .log-text  { color: var(--danger); }
.log-line.sent .log-text { color: var(--warning); }

/* Empty state */
.empty-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 8px;
  color: var(--text-dim);
  font-size: 13px;
  pointer-events: none;
  user-select: none;
}
.empty-hint .icon { font-size: 40px; opacity: 0.3; }

/* ── SEND BAR ── */
#sendBar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--bg2);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
#sendInput {
  flex: 1;
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s;
}
#sendInput:focus { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-glow); }
#sendInput::placeholder { color: var(--text-dim); }
#sendInput:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── TOAST ── */
#toast {
  position: fixed;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg3);
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 12px;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s;
  white-space: nowrap;
  z-index: 999;
  box-shadow: 0 0 16px var(--accent-glow);
}
#toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── MODAL ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
  animation: fadeIn 0.2s ease;
}
.modal-overlay.hidden { display: none; }

.modal {
  background: var(--bg2);
  border: 1px solid var(--accent);
  border-radius: 12px;
  width: 360px;
  max-width: calc(100vw - 32px);
  box-shadow: 0 0 40px var(--accent-glow), 0 8px 32px rgba(0,0,0,0.6);
  position: relative;
  animation: slideUp 0.2s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.modal-close {
  position: absolute;
  top: 12px; right: 12px;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 50%;
  width: 26px; height: 26px;
  cursor: pointer;
  font-size: 12px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
}
.modal-close:hover { border-color: var(--danger); color: var(--danger); }

.modal-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 20px 14px;
  border-bottom: 1px solid var(--border);
}
.modal-icon {
  font-size: 32px;
  line-height: 1;
  filter: drop-shadow(0 0 8px var(--accent));
}
.modal-header h2 {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 2px;
}
.modal-sub { font-size: 11px; color: var(--text-dim); }

.modal-body {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
}
.info-label { color: var(--text-dim); }
.info-value { color: var(--text); font-weight: 600; }

.info-divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

.github-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  font-size: 12px;
  font-family: var(--font-mono);
  transition: all 0.2s;
  margin-top: 2px;
}
.github-link svg { width: 16px; height: 16px; flex-shrink: 0; color: var(--accent); }
.github-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}
.github-link.repo svg { color: var(--text-dim); }

.modal-footer {
  padding: 10px 20px 14px;
  text-align: center;
  font-size: 11px;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
}

/* ── Responsive ── */
@media (max-width: 700px) {
  .app-title { display: none; }
  .header-left { min-width: unset; }
  .btn span { display: none; }
  .btn-icon { padding: 6px; }
  .log-time, .log-index { display: none; }
  #header { gap: 6px; padding: 6px 8px; }
}