/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:           #1e1e1e;
  --surface:      #2a2a2a;
  --surface2:     #323232;
  --border:       rgba(255,255,255,0.08);
  --border-light: rgba(255,255,255,0.12);
  --text:         #f0f0f0;
  --text-muted:   #888;
  --text-dim:     #555;
  --accent:       #f5a623;
  --accent-blue:  #4fc3f7;
  --accent-red:   #ef5350;
  --accent-green: #66bb6a;
  --accent-purple:#ab47bc;
  --accent-cyan:  #26c6da;
  --sidebar-w:    220px;
  --titlebar-h:   44px;
  --radius:       10px;
  --font-ui:      'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  --font-mono:    'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
}

html, body {
  height: 100%;
  background: #111;
  font-family: var(--font-ui);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

/* ── macOS Window Shell ───────────────────────────────────── */
#app-window {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  overflow: hidden;
}

/* ── Title Bar ────────────────────────────────────────────── */
.titlebar {
  height: var(--titlebar-h);
  background: rgba(30,30,30,0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  flex-shrink: 0;
  user-select: none;
}

.traffic-lights {
  display: flex;
  gap: 8px;
  align-items: center;
}

.traffic-light {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  cursor: pointer;
  transition: filter 0.15s;
}
.traffic-light:hover { filter: brightness(1.3); }
.traffic-light.close   { background: #ff5f57; border: 1px solid rgba(0,0,0,0.2); }
.traffic-light.minimize{ background: #febc2e; border: 1px solid rgba(0,0,0,0.2); }
.traffic-light.maximize{ background: #28c840; border: 1px solid rgba(0,0,0,0.2); }

.titlebar-title {
  flex: 1;
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: -0.01em;
}

.titlebar-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: #000;
  background: var(--accent);
  padding: 2px 7px;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

/* ── Main Layout ──────────────────────────────────────────── */
.app-body {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* ── Sidebar ──────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: rgba(26,26,26,0.9);
  backdrop-filter: blur(20px);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
}

.sidebar-section {
  padding: 16px 12px 8px;
}

.sidebar-section-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0 8px;
  margin-bottom: 4px;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  border-radius: 7px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  transition: background 0.12s, color 0.12s;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
}

.sidebar-item:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text);
}

.sidebar-item.active {
  background: rgba(245,166,35,0.15);
  color: var(--accent);
}

.sidebar-item .item-icon {
  font-size: 15px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-item .item-lang {
  font-family: var(--font-mono);
  font-size: 9px;
  color: inherit;
  opacity: 0.6;
  margin-left: auto;
}

.sidebar-divider {
  height: 1px;
  background: var(--border);
  margin: 8px 12px;
}

/* ── Main Content ─────────────────────────────────────────── */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Toolbar ──────────────────────────────────────────────── */
.toolbar {
  height: 40px;
  background: rgba(36,36,36,0.8);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  flex-shrink: 0;
}

.toolbar-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
}

.toolbar-target-name {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
}

.toolbar-spacer { flex: 1; }

.toolbar-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 6px;
  border: none;
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.12s;
}

.toolbar-btn.primary {
  background: var(--accent);
  color: #000;
}
.toolbar-btn.primary:hover { filter: brightness(1.1); }
.toolbar-btn.primary:disabled {
  background: var(--surface2);
  color: var(--text-dim);
  cursor: not-allowed;
}

.toolbar-btn.secondary {
  background: var(--surface2);
  color: var(--text-muted);
  border: 1px solid var(--border-light);
}
.toolbar-btn.secondary:hover {
  background: rgba(255,255,255,0.08);
  color: var(--text);
}

.kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  background: rgba(0,0,0,0.3);
  padding: 1px 4px;
  border-radius: 3px;
  color: inherit;
}

/* ── Editor Area ──────────────────────────────────────────── */
.editor-area {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
}

.editor-pane {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-right: 1px solid var(--border);
}

.output-pane {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.pane-header {
  height: 36px;
  background: rgba(36,36,36,0.6);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 8px;
  flex-shrink: 0;
}

.pane-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.pane-tab {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-dim);
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  border: none;
  background: transparent;
  transition: all 0.12s;
}
.pane-tab:hover { color: var(--text-muted); }
.pane-tab.active {
  background: rgba(255,255,255,0.08);
  color: var(--text);
}

.pane-spacer { flex: 1; }

.pane-badge {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 3px;
  letter-spacing: 0.05em;
}

textarea.editor-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  resize: none;
  font-family: var(--font-ui);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text);
  padding: 16px;
  caret-color: var(--accent);
}

textarea.editor-input::placeholder {
  color: var(--text-dim);
  font-style: italic;
}

.output-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}

pre.code-output {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: #c8c8c8;
  white-space: pre-wrap;
  word-break: break-word;
}

.output-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 12px;
  color: var(--text-dim);
}

.output-placeholder .icon {
  font-size: 2.5rem;
  opacity: 0.3;
}

.output-placeholder p {
  font-size: 13px;
  text-align: center;
  max-width: 240px;
  line-height: 1.6;
}

/* ── Status Bar ───────────────────────────────────────────── */
.statusbar {
  height: 24px;
  background: rgba(20,20,20,0.9);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 16px;
  flex-shrink: 0;
}

.statusbar-item {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 5px;
}

.statusbar-item.active { color: var(--accent-green); }
.statusbar-item.loading { color: var(--accent); }
.statusbar-item.error { color: var(--accent-red); }

.statusbar-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* ── Loading Spinner ──────────────────────────────────────── */
@keyframes spin {
  to { transform: rotate(360deg); }
}
.spinner {
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid rgba(245,166,35,0.3);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

/* ── Welcome Screen ───────────────────────────────────────── */
.welcome {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 2rem;
  text-align: center;
}

.welcome-logo {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.04em;
}

.welcome-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.welcome-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 400px;
  line-height: 1.7;
}

.welcome-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  max-width: 600px;
  width: 100%;
}

.welcome-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
  border-left: 3px solid transparent;
}
.welcome-card:hover {
  background: var(--surface2);
  transform: translateY(-1px);
}

.welcome-card-icon { font-size: 1.3rem; margin-bottom: 6px; }
.welcome-card-label { font-size: 12px; font-weight: 600; color: var(--text); }
.welcome-card-lang { font-family: var(--font-mono); font-size: 10px; color: var(--text-dim); margin-top: 2px; }

/* ── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* ── Error ────────────────────────────────────────────────── */
.error-msg {
  color: var(--accent-red);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  padding: 12px;
  background: rgba(239,83,80,0.08);
  border-radius: 6px;
  border-left: 3px solid var(--accent-red);
}

/* ── Copy button ──────────────────────────────────────────── */
.copy-btn {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-light);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  font-family: var(--font-ui);
  transition: all 0.12s;
}
.copy-btn:hover { color: var(--text); background: rgba(255,255,255,0.06); }