:root {
    --bg-primary: #000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #111;
    --bg-hover: #1a1a1a;
    --bg-card: #0d0d0d;
    --text-primary: #eaeaea;
    --text-secondary: #7a7a7a;
    --text-muted: #444;
    --border-color: #2a2a2a;
    --accent: #eaeaea;
    --accent-hover: #fff;
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
    --radius: 2px;
    --radius-lg: 2px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    line-height: 1.6;
    letter-spacing: 0.02em;
}

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

/* Header */
#header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
    min-height: 56px;
}

#header h1 {
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 12px;
}

#header h1::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--success);
    border-radius: 50%;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.zoom-controls {
    display: flex;
    align-items: center;
    gap: 2px;
    background: transparent;
    padding: 0;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
}

.zoom-controls button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    border-radius: 0;
    cursor: pointer;
    transition: all 0.18s ease;
}

.zoom-controls button:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

#zoom-level {
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    min-width: 48px;
    text-align: center;
}

/* Canvas Container */
#canvas-container {
    flex: 1;
    overflow: hidden;
    position: relative;
    background: #050505;
    background-image:
        radial-gradient(circle at 1px 1px, #1f1f1f 1px, transparent 0);
    background-size: 32px 32px;
    cursor: grab;
}

#canvas-container:active {
    cursor: grabbing;
}

#canvas {
    position: absolute;
    transform-origin: 0 0;
}

/* Loading */
#loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    z-index: 1000;
    gap: 16px;
}

.loader {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

#loading p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Error */
#error {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    z-index: 1000;
    gap: 16px;
    text-align: center;
    padding: 24px;
}

#error svg {
    color: var(--error);
}

#error h2 {
    font-size: 20px;
    font-weight: 600;
}

#error p {
    color: var(--text-secondary);
    max-width: 400px;
}

/* Canvas Nodes */
.canvas-node {
    position: absolute;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: all 0.18s ease;
}

.canvas-node:hover {
    border-color: #333;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.8);
}

/* Text Nodes */
.canvas-node.text-node {
    padding: 0;
    display: flex;
    flex-direction: column;
    overflow: visible;
}

.canvas-node.text-node .node-header {
    position: absolute;
    top: 4px;
    right: 4px;
    z-index: 10;
}

.canvas-node.text-node .copy-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    background: rgba(0,0,0,0.6);
    border: none;
    border-radius: 4px;
    color: white;
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    opacity: 0;
}

.canvas-node.text-node:hover .copy-btn {
    opacity: 1;
}

.canvas-node.text-node .copy-btn:hover {
    background: rgba(0,0,0,0.8);
}

.canvas-node.text-node .copy-btn.copied {
    background: var(--success);
}

.canvas-node.text-node .node-content {
    font-size: 14px;
    line-height: 1.2;
    color: var(--text-primary);
    overflow: visible;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 4px 8px;
    text-align: center;
    box-sizing: border-box;
}

/* When content has code blocks, align left */
.canvas-node.text-node .node-content:has(pre) {
    justify-content: flex-start;
    align-items: stretch;
    text-align: left;
    padding: 12px;
    overflow: auto;
}

/* Small text nodes - minimal padding */
.canvas-node.text-node .node-content p {
    margin: 0;
    white-space: nowrap;
    overflow: visible;
}

.canvas-node.text-node .node-content p:only-child {
    display: flex;
    align-items: center;
    justify-content: center;
}

.canvas-node.text-node .node-content center {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin: 0;
    white-space: nowrap;
}

.canvas-node.text-node .node-content h1,
.canvas-node.text-node .node-content h2,
.canvas-node.text-node .node-content h3 {
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.canvas-node.text-node .node-content h1 { font-size: 1.5em; }
.canvas-node.text-node .node-content h2 { font-size: 1.25em; }
.canvas-node.text-node .node-content h3 { font-size: 1.1em; }

.canvas-node.text-node .node-content p {
    margin-bottom: 12px;
}

.canvas-node.text-node .node-content ul,
.canvas-node.text-node .node-content ol {
    margin-left: 20px;
    margin-bottom: 12px;
}

.canvas-node.text-node .node-content code {
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', 'Fira Code', 'SF Mono', Monaco, Consolas, monospace;
    font-size: 0.85em;
    color: var(--accent);
}

.canvas-node.text-node .node-content pre {
    background: #1a1a1a;
    padding: 16px;
    border-radius: var(--radius);
    overflow-x: auto;
    overflow-y: auto;
    margin-bottom: 12px;
    border: 1px solid var(--border-color);
    max-height: calc(100% - 60px);
}

.canvas-node.text-node .node-content pre code {
    background: none;
    padding: 0;
    color: #e6e6e6;
    font-size: 12px;
    line-height: 1.5;
    white-space: pre;
    word-break: normal;
}

.canvas-node.text-node .node-content a {
    color: var(--accent);
    text-decoration: none;
}

.canvas-node.text-node .node-content a:hover {
    text-decoration: underline;
}

/* File/Image Nodes */
.canvas-node.file-node {
    padding: 0;
    cursor: pointer;
}

.canvas-node.file-node img,
.canvas-node.file-node video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.canvas-node.file-node:hover img,
.canvas-node.file-node:hover video {
    transform: scale(1.02);
}

.canvas-node.file-node .video-container {
    width: 100%;
    height: 100%;
    position: relative;
}

.canvas-node.file-node .video-container video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.canvas-node.file-node .play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 56px;
    height: 56px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.canvas-node.file-node .play-overlay svg {
    color: white;
    margin-left: 4px;
}

.canvas-node.file-node .video-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    gap: 4px;
    padding: 8px;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    opacity: 0;
    transition: opacity 0.2s ease;
}

.canvas-node.file-node:hover .video-controls {
    opacity: 1;
}

.canvas-node.file-node .video-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: rgba(255,255,255,0.15);
    color: white;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.15s ease;
}

.canvas-node.file-node .video-btn:hover {
    background: rgba(255,255,255,0.3);
}

.canvas-node.file-node .file-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 20px;
    text-align: center;
    gap: 8px;
}

.canvas-node.file-node .file-placeholder svg {
    color: var(--text-muted);
}

.canvas-node.file-node .file-placeholder span {
    font-size: 12px;
    color: var(--text-secondary);
    word-break: break-word;
}

/* Link Nodes */
.canvas-node.link-node {
    padding: 20px;
    cursor: pointer;
}

.canvas-node.link-node:hover {
    border-color: var(--accent);
}

.canvas-node.link-node .link-icon {
    font-size: 24px;
    margin-bottom: 8px;
}

.canvas-node.link-node .link-url {
    font-size: 13px;
    color: var(--accent);
    word-break: break-all;
}

/* Group Nodes */
.canvas-node.group-node {
    background: transparent;
    border: 2px dashed var(--border-color);
    box-shadow: none;
}

.canvas-node.group-node .group-label {
    position: absolute;
    top: -28px;
    left: 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-primary);
    padding: 4px 8px;
    border-radius: 4px;
}

/* Color variations */
.canvas-node.color-1 { border-left: 4px solid #e74c3c; }
.canvas-node.color-2 { border-left: 4px solid #e67e22; }
.canvas-node.color-3 { border-left: 4px solid #f1c40f; }
.canvas-node.color-4 { border-left: 4px solid #2ecc71; }
.canvas-node.color-5 { border-left: 4px solid #3498db; }
.canvas-node.color-6 { border-left: 4px solid #9b59b6; }

/* SVG Edges */
#edges-svg {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    overflow: visible;
}

.edge-line {
    stroke: var(--text-muted);
    stroke-width: 2;
    fill: none;
}

.edge-arrow {
    fill: var(--text-muted);
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    max-width: 95vw;
    max-height: 95vh;
}

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

.video-modal-content {
    width: 90vw;
    max-width: 1200px;
}

.video-modal-content video {
    width: 100%;
    height: auto;
}

.modal-close {
    position: absolute;
    top: -48px;
    right: 0;
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border: none;
    border-radius: 50%;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.modal-close:hover {
    background: var(--error);
}

/* Toast */
#toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 10001;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 14px;
    box-shadow: var(--shadow);
    animation: slideIn 0.3s ease;
}

.toast.success {
    border-color: var(--success);
    background: rgba(46, 204, 113, 0.1);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Markdown Nodes */
.canvas-node.markdown-node {
    padding: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-card);
}

.canvas-node.markdown-node .markdown-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    min-height: 36px;
}

.canvas-node.markdown-node .markdown-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.canvas-node.markdown-node .copy-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    opacity: 0;
    flex-shrink: 0;
}

.canvas-node.markdown-node:hover .copy-btn {
    opacity: 1;
}

.canvas-node.markdown-node .copy-btn:hover {
    background: rgba(255,255,255,0.2);
    color: var(--text-primary);
}

.canvas-node.markdown-node .copy-btn.copied {
    background: var(--success);
    color: white;
}

.canvas-node.markdown-node .markdown-content {
    flex: 1;
    padding: 16px;
    overflow: auto;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
}

.canvas-node.markdown-node .markdown-content h1,
.canvas-node.markdown-node .markdown-content h2,
.canvas-node.markdown-node .markdown-content h3,
.canvas-node.markdown-node .markdown-content h4,
.canvas-node.markdown-node .markdown-content h5,
.canvas-node.markdown-node .markdown-content h6 {
    margin-top: 0;
    margin-bottom: 12px;
    font-weight: 600;
    color: var(--text-primary);
}

.canvas-node.markdown-node .markdown-content h1 { font-size: 1.5em; }
.canvas-node.markdown-node .markdown-content h2 { font-size: 1.3em; }
.canvas-node.markdown-node .markdown-content h3 { font-size: 1.15em; }

.canvas-node.markdown-node .markdown-content p {
    margin-bottom: 12px;
}

.canvas-node.markdown-node .markdown-content ul,
.canvas-node.markdown-node .markdown-content ol {
    margin-left: 20px;
    margin-bottom: 12px;
}

.canvas-node.markdown-node .markdown-content li {
    margin-bottom: 4px;
}

.canvas-node.markdown-node .markdown-content code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.9em;
    color: var(--accent);
}

.canvas-node.markdown-node .markdown-content pre {
    background: #1a1a1a;
    padding: 12px;
    border-radius: var(--radius);
    overflow-x: auto;
    margin-bottom: 12px;
    border: 1px solid var(--border-color);
}

.canvas-node.markdown-node .markdown-content pre code {
    background: none;
    padding: 0;
    color: #e6e6e6;
    font-size: 12px;
    line-height: 1.5;
}

.canvas-node.markdown-node .markdown-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 16px;
    margin: 12px 0;
    color: var(--text-secondary);
    font-style: italic;
}

.canvas-node.markdown-node .markdown-content a {
    color: var(--accent);
    text-decoration: none;
}

.canvas-node.markdown-node .markdown-content a:hover {
    text-decoration: underline;
}

.canvas-node.markdown-node .markdown-content img {
    max-width: 100%;
    border-radius: var(--radius);
    margin: 8px 0;
}

.canvas-node.markdown-node .markdown-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 12px;
}

.canvas-node.markdown-node .markdown-content th,
.canvas-node.markdown-node .markdown-content td {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.canvas-node.markdown-node .markdown-content th {
    background: var(--bg-tertiary);
    font-weight: 600;
}

.canvas-node.markdown-node .markdown-content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 16px 0;
}

/* User Badge */
.user-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: default;
    transition: all 0.18s ease;
}

.user-badge:hover {
    border-color: #444;
}

.user-initial {
    color: var(--text-muted);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.05em;
}

/* Disable selection */
body.no-select {
    user-select: none;
    -webkit-user-select: none;
}

/* DevTools detected - blur content */
body.devtools-open #canvas-container {
    filter: blur(20px);
    pointer-events: none;
}

body.devtools-open::after {
    content: 'Ferramentas de desenvolvedor detectadas';
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.95);
    color: #ef4444;
    padding: 24px 48px;
    border: 1px solid #333;
    border-radius: 2px;
    font-size: 14px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    z-index: 99999;
}

/* Login Screen - Premium NEIA Style */
#login-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #000;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-container {
    background: transparent;
    border: 1px solid #2a2a2a;
    border-radius: 2px;
    padding: 48px 40px;
    max-width: 440px;
    width: 100%;
    text-align: center;
}

.login-logo {
    margin-bottom: 32px;
}

.neia-logo {
    height: 32px;
    width: auto;
    opacity: 0.95;
}

.login-divider {
    width: 40px;
    height: 1px;
    background: #333;
    margin: 0 auto 32px;
}

.login-badge {
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.25em;
    color: #555;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.login-title {
    font-size: 20px;
    font-weight: 400;
    letter-spacing: 0.08em;
    color: #eaeaea;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.login-subtitle {
    font-size: 13px;
    color: #7a7a7a;
    margin-bottom: 40px;
    line-height: 1.7;
    letter-spacing: 0.02em;
}

#login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    text-align: left;
}

.form-group label {
    display: block;
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: #555;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.form-group input {
    width: 100%;
    padding: 16px 18px;
    background: transparent;
    border: 1px solid #2a2a2a;
    border-radius: 2px;
    color: #eaeaea;
    font-size: 14px;
    font-family: inherit;
    letter-spacing: 0.04em;
    transition: all 0.18s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #555;
    background: rgba(255, 255, 255, 0.02);
}

.form-group input::placeholder {
    color: #444;
    letter-spacing: 0.04em;
}

#login-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 16px 24px;
    background: transparent;
    border: 1px solid #eaeaea;
    border-radius: 2px;
    color: #eaeaea;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.2em;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.18s ease;
    margin-top: 12px;
    text-transform: uppercase;
}

#login-btn:hover:not(:disabled) {
    background: #eaeaea;
    color: #000;
}

#login-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#login-btn .btn-loading {
    display: flex;
    align-items: center;
}

.login-error {
    margin-top: 20px;
    padding: 14px 18px;
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 2px;
    color: #ef4444;
    font-size: 12px;
    letter-spacing: 0.02em;
    text-align: left;
    line-height: 1.5;
}

.login-help {
    margin-top: 40px;
    font-size: 11px;
    letter-spacing: 0.08em;
    color: #555;
}

.login-help a {
    color: #7a7a7a;
    text-decoration: none;
    border-bottom: 1px solid #333;
    padding-bottom: 2px;
    transition: all 0.18s ease;
}

.login-help a:hover {
    color: #eaeaea;
    border-color: #eaeaea;
}

/* Responsive */
@media (max-width: 768px) {
    #header {
        padding: 12px 16px;
    }

    #header h1 {
        font-size: 14px;
    }

    .zoom-controls {
        display: none;
    }

    .login-container {
        padding: 32px 24px;
    }

    .login-title {
        font-size: 20px;
    }
}