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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    overflow: hidden;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #16213e 100%);
    color: #ffffff;
}

#bg-canvas {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
}

#app {
    position: relative;
    z-index: 1;
    width: 100vw;
    height: 100vh;
}

/* Canvas Container */
.canvas-container {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
    cursor: grab;
}

.canvas-container.dragging {
    cursor: grabbing;
}

/* Canvas */
.canvas {
    width: 100%;
    height: 100%;
    position: relative;
    transition: transform 0.3s ease-out;
}

/* Nodes */
.node {
    position: absolute;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border: 3px solid yellow;
    z-index: 100;
}

.node:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

.node.level-1 {
    width: 180px;
    height: 180px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.8), rgba(139, 92, 246, 0.8));
}

.node.level-2 {
    width: 140px;
    height: 140px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.8), rgba(99, 102, 241, 0.8));
}

.node.level-3 {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.8), rgba(59, 130, 246, 0.8));
}

.node-content {
    text-align: center;
    padding: 10px;
    font-weight: 600;
    font-size: 14px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.node.level-1 .node-content {
    font-size: 18px;
}

.node.level-2 .node-content {
    font-size: 16px;
}

.node.level-3 .node-content {
    font-size: 12px;
}

/* Connections */
.connection {
    position: absolute;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    height: 2px;
    transform-origin: left center;
    pointer-events: none;
    opacity: 0.3;
}

/* Controls */
.controls {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
    z-index: 1000;
}

.control-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    backdrop-filter: blur(10px);
    transition: all 0.2s ease;
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

/* Header */
.header {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1000;
}

.header h1 {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, #fff 0%, #a78bfa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 10px rgba(167, 139, 250, 0.3);
}

.header p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 5px;
}

/* Breadcrumb */
.breadcrumb {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 10px 20px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 10px;
}

.breadcrumb-item {
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    transition: color 0.2s ease;
}

.breadcrumb-item:hover {
    color: white;
}

.breadcrumb-separator {
    color: rgba(255, 255, 255, 0.3);
}

/* Loading */
.loading {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top-color: #a78bfa;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Image Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    cursor: pointer;
}

.modal-content {
    max-width: 90vw;
    max-height: 90vh;
    cursor: default;
}

.modal-content img {
    max-width: 100%;
    max-height: 90vh;
    border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.modal-close {
    position: fixed;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 18px;
    backdrop-filter: blur(10px);
}