:root {
  --bg-color: #0b1120;
  --panel-bg: rgba(15, 23, 42, 0.4);
  --panel-bg-blur: 20px;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.15);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --accent: #8b5cf6;
  --success: #10b981;
  --danger: #f43f5e;
  --node-header: rgba(15, 23, 42, 0.85);
  --node-bg: rgba(15, 23, 42, 0.95);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255,255,255,0.05) inset;
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.5);
}

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

body {
  font-family: 'Outfit', sans-serif;
  background-color: var(--bg-color);
  background-image: 
      radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.15), transparent 30%),
      radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.15), transparent 30%),
      url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  color: var(--text-main);
  height: 100vh;
  overflow: hidden;
}

.app-container {
  display: flex;
  height: 100vh;
  width: 100vw;
}

/* Sidebar */
.sidebar {
  width: 300px;
  background: var(--panel-bg);
  backdrop-filter: blur(var(--panel-bg-blur));
  -webkit-backdrop-filter: blur(var(--panel-bg-blur));
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 10;
  box-shadow: 5px 0 25px rgba(0,0,0,0.5);
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background: rgba(0,0,0,0.2);
}

.sidebar-header h2 {
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(135deg, #60a5fa, #c084fc);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sidebar-header i {
  color: #60a5fa;
  -webkit-text-fill-color: #60a5fa;
  font-size: 1.5rem;
}

.node-list {
  flex: 1;
  padding: 1.5rem;
  overflow-y: auto;
}

.node-list::-webkit-scrollbar {
  width: 6px;
}
.node-list::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.1);
  border-radius: 10px;
}

.node-list h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 1.2rem;
  margin-top: 1.8rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.node-list h3::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border-color);
}

.node-list h3:first-child { margin-top: 0; }

.drag-drawflow {
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid var(--border-color);
  padding: 0.8rem 1rem;
  border-radius: 10px;
  margin-bottom: 0.75rem;
  cursor: grab;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.drag-drawflow:hover {
  background: rgba(59, 130, 246, 0.15);
  border-color: rgba(59, 130, 246, 0.4);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 15px rgba(0,0,0,0.2), 0 0 10px rgba(59,130,246,0.2);
}

.drag-drawflow i {
  color: var(--primary);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 6px;
  font-size: 0.9rem;
}

.sidebar-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: rgba(0,0,0,0.2);
}

/* Buttons */
.btn {
  padding: 0.8rem 1rem;
  border: 1px solid transparent;
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all 0.3s ease;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}
.btn-primary:hover { 
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
  transform: translateY(-2px);
}

.btn-success {
  background: linear-gradient(135deg, var(--success), #059669);
  color: white;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}
.btn-success:hover { 
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
  transform: translateY(-2px);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  background: var(--panel-bg);
  backdrop-filter: blur(10px);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 10px;
}
.btn-icon:hover { 
  background: rgba(255,255,255,0.1); 
  border-color: var(--border-light);
  transform: translateY(-2px);
}
.btn-danger:hover { background: rgba(244, 63, 94, 0.1); color: var(--danger); border-color: rgba(244, 63, 94, 0.3); }

/* Status */
.status-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 8px;
  font-weight: 500;
}

.pulse-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #64748b;
  transition: all 0.3s;
}
.pulse-indicator.active {
  background: var(--success);
  box-shadow: 0 0 10px var(--success), 0 0 20px rgba(16, 185, 129, 0.5);
}

/* Canvas Area */
.canvas-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
}

.topbar {
  position: absolute;
  top: 1.5rem;
  left: 1.5rem;
  right: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
  pointer-events: none;
}

.flow-title {
  pointer-events: auto;
  background: var(--panel-bg);
  backdrop-filter: blur(var(--panel-bg-blur));
  -webkit-backdrop-filter: blur(var(--panel-bg-blur));
  padding: 0.5rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.flow-title:hover {
  border-color: rgba(255,255,255,0.2);
  background: rgba(30, 41, 59, 0.6);
}

.flow-title .badge {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.3), rgba(139, 92, 246, 0.3));
  border: 1px solid rgba(139, 92, 246, 0.3);
  color: #a78bfa;
  padding: 4px 10px;
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.flow-title input {
  background: transparent;
  border: none;
  color: white;
  font-family: inherit;
  font-size: 1.15rem;
  font-weight: 600;
  outline: none;
  width: 300px;
}

.flow-title input::placeholder {
  color: var(--text-muted);
}

.topbar .actions {
  pointer-events: auto;
  display: flex;
  gap: 10px;
  background: var(--panel-bg);
  backdrop-filter: blur(var(--panel-bg-blur));
  -webkit-backdrop-filter: blur(var(--panel-bg-blur));
  padding: 0.5rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

/* Drawflow Overrides */
#drawflow {
  width: 100%;
  height: 100%;
  background: transparent;
}

.drawflow .connection .main-path {
  stroke: var(--primary);
  stroke-width: 4px;
}
.drawflow .connection .main-path:hover {
  stroke: var(--accent);
  stroke-width: 5px;
}

.drawflow-node {
  background: var(--node-bg);
  border: 1px solid var(--border-light);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  color: var(--text-main);
  padding: 0;
  width: 320px;
  overflow: hidden;
  backdrop-filter: blur(10px);
  animation: nodeFadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes nodeFadeIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.drawflow-node.selected {
  border: 1px solid var(--primary);
  box-shadow: var(--shadow-glow), var(--shadow-lg);
}

.drawflow-node .title-box {
  background: var(--node-header);
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 1rem;
}

.drawflow-node .title-box i { 
  color: var(--primary); 
  background: rgba(59, 130, 246, 0.1);
  padding: 6px;
  border-radius: 6px;
}

.drawflow-node .box {
  padding: 18px;
}

.drawflow-node p {
  font-size: 0.85rem;
  color: #cbd5e1;
  margin-bottom: 12px;
  line-height: 1.4;
}

/* Custom Node Inputs */
.df-input, .df-select {
  width: 100%;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-color);
  color: #fff;
  padding: 10px 12px;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.9rem;
  margin-top: 8px;
  outline: none;
  transition: all 0.2s;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
}

.df-input:focus, .df-select:focus {
  border-color: var(--primary);
  background: rgba(0, 0, 0, 0.6);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.2), 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.df-select option {
  background: #1e293b;
  color: #fff;
}

.node-result {
  margin-top: 15px;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 500;
  display: none;
  animation: fadeIn 0.3s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

.node-result.success {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}
.node-result.error {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(244, 63, 94, 0.15);
  color: #fb7185;
  border: 1px solid rgba(244, 63, 94, 0.3);
}

/* Dots */
.drawflow .input, .drawflow .output {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 3px solid;
  transition: transform 0.2s;
}
.drawflow .input:hover, .drawflow .output:hover {
  transform: scale(1.2);
}
.drawflow .input { background: #1e293b; border-color: #94a3b8; margin-left: -24px;}
.drawflow .output { background: #1e293b; border-color: var(--primary); right: -12px;}

/* Custom Context Menu */
.context-menu {
  position: absolute;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.7), 0 0 0 1px rgba(255,255,255,0.05) inset;
  padding: 8px;
  min-width: 220px;
  z-index: 1000;
  animation: menuAppear 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  transform-origin: top left;
}

@keyframes menuAppear {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.context-menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.context-menu .menu-title {
  padding: 8px 12px;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  font-weight: 600;
}

.context-menu li:not(.menu-title):not(.separator) {
  padding: 10px 12px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-main);
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.2s;
}

.context-menu li i {
  width: 20px;
  text-align: center;
  color: var(--primary);
  font-size: 1rem;
}

.context-menu li:hover:not(.menu-title):not(.separator) {
  background: rgba(59, 130, 246, 0.2);
  color: #fff;
}

.context-menu .danger-text {
  color: #fca5a5 !important;
}
.context-menu .danger-text i {
  color: #f87171 !important;
}
.context-menu .danger-text:hover {
  background: rgba(239, 68, 68, 0.2) !important;
  color: #fff !important;
}

.context-menu .separator {
  height: 1px;
  background: var(--border-color);
  margin: 6px 0;
}