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

:root {
    /* Pixel Defence Dark Theme Core */
    --bg-main: #050508;
    --bg-card: #0d1120;
    --bg-hover: #161d2e;
    
    /* Neon Accents */
    --neon-cyan: #22d3ee;
    --neon-purple: #a78bfa;
    --neon-cyan-dim: rgba(34, 211, 238, 0.15);
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #475569;
    
    /* UI Elements */
    --border-color: rgba(255, 255, 255, 0.08);
    --border-bright: rgba(255, 255, 255, 0.15);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    
    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Background FX */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}
.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
}
.orb-1 {
    top: -10%; left: -10%;
    width: 50vw; height: 50vw;
    background: var(--neon-cyan);
}
.orb-2 {
    bottom: -20%; right: -10%;
    width: 60vw; height: 60vw;
    background: var(--neon-purple);
}

/* Header */
.global-site-header {
    background: rgba(5, 5, 8, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.header-logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}
.logo-icon {
    color: var(--neon-cyan);
}
.header-nav {
    display: flex;
    gap: 28px;
    align-items: center;
}
.header-nav a, .dropdown-trigger {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition);
    cursor: pointer;
}
.header-nav a:hover, .dropdown-trigger:hover {
    color: var(--neon-cyan);
}
.dropdown {
    position: relative;
}
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px 0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition);
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}
.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.dropdown-menu a {
    display: block;
    padding: 10px 20px;
    color: var(--text-secondary);
}
.dropdown-menu a:hover {
    background: var(--bg-hover);
    color: var(--neon-cyan);
}
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
}

/* Mobile Nav Panel */
.mobile-nav-panel {
    display: none;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 20px;
    flex-direction: column;
    gap: 12px;
}
.mobile-nav-panel.active {
    display: flex;
}
.mobile-nav-panel a {
    color: var(--text-primary);
    text-decoration: none;
    padding: 10px;
    border-radius: var(--radius-sm);
}
.mobile-nav-panel a:hover {
    background: var(--bg-hover);
    color: var(--neon-cyan);
}
.mobile-nav-divider {
    height: 1px;
    background: var(--border-color);
    margin: 4px 0;
}
.mobile-nav-group-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    padding: 0 10px;
    margin-top: 8px;
}

/* Dashboard / Main Container */
.dashboard {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 24px;
    flex: 1;
}

.dashboard-header {
    text-align: center;
    margin-bottom: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(167, 139, 250, 0.05); /* dim purple */
    border: 1px solid rgba(167, 139, 250, 0.2);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--neon-purple);
    margin-bottom: 24px;
}
.status-pill svg {
    color: var(--neon-purple);
}

.dashboard-header h1 {
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    line-height: 1.2;
}

.gradient-text {
    background: linear-gradient(90deg, #a78bfa, #22d3ee);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}
.intro-paragraph p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Dropzone */
.dropzone-container {
    background: var(--bg-card);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.dropzone-container:hover, .dropzone-container.dragover {
    border-color: var(--neon-cyan);
    background: var(--bg-hover);
}
.dropzone-container.dragover {
    transform: scale(1.02);
}
.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--neon-cyan);
    margin-bottom: 16px;
}
.dropzone-text {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: 0.05em;
}
.dropzone-subtext {
    color: var(--text-secondary);
    font-size: 0.9rem;
}
#file-input {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    opacity: 0; cursor: pointer;
}

/* Tool Panel */
.tool-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-bright);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}
.tool-group {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-main);
    padding: 4px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}
.tool-group label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-left: 12px;
    margin-right: 4px;
    font-weight: 600;
}
.mode-btn, .draw-tool-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}
.mode-btn:hover, .draw-tool-btn:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}
.mode-btn.active, .draw-tool-btn.active {
    background: var(--bg-card);
    color: var(--neon-cyan);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    border: 1px solid var(--border-bright);
}

.action-group {
    display: flex;
    gap: 12px;
}
.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}
.action-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-bright);
}
.action-btn svg {
    color: var(--text-secondary);
}

/* Canvas Container */
.canvas-container {
    width: 100%;
    background: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAMUlEQVQ4T2NkYNgNwMjAyPABVbBBDdAIxsHDwMjA8P/n37+/oHwYGE1jMBrGYDSAAACTOQY1Hq6H2wAAAABJRU5ErkJggg=='); /* Checkerboard */
    border: 1px solid var(--border-bright);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 300px;
    max-height: 600px;
    position: relative;
    cursor: crosshair;
    touch-action: none; /* Prevent scrolling when drawing on mobile */
}

#editor-canvas {
    max-width: 100%;
    max-height: 600px;
    object-fit: contain;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
}

/* Export Bar */
.export-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 16px;
}
.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
}
.btn-primary {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 15px rgba(34, 211, 238, 0.4);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(34, 211, 238, 0.6);
}
.btn-secondary {
    background: var(--bg-hover);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover {
    background: var(--border-bright);
}
.export-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 12px;
    text-align: right;
}

/* SEO Content */
.seo-content-section {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}
.seo-h2 {
    font-size: 1.5rem;
    font-weight: 800;
    margin: 32px 0 16px;
    color: var(--text-primary);
}
.seo-p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 24px;
}
.seo-p strong {
    color: var(--text-primary);
}
.seo-link {
    color: var(--neon-cyan);
    text-decoration: none;
}
.seo-link:hover {
    text-decoration: underline;
}

.use-case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-top: 24px;
}
.use-case-item {
    background: var(--bg-card);
    border: 1px solid var(--border-bright);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: all var(--transition);
}
.use-case-item.no-underline {
    text-decoration: none;
    display: block;
}
.use-case-item:hover {
    border-color: rgba(124,58,237,0.3);
    background: var(--bg-hover);
    transform: translateY(-2px);
}
.use-icon {
    display: block;
    font-size: 1.5rem;
    margin-bottom: 10px;
}
.use-case-item strong {
    display: block;
    font-size: 0.95rem;
    margin-bottom: 6px;
    color: var(--text-primary);
}
.use-case-item p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Global Footer */
.global-site-footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 60px 24px 30px;
    margin-top: auto;
}
.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}
.footer-top {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-socials {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}
.footer-socials a {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
}
.footer-socials a:hover { color: var(--neon-cyan); }
.footer-links-grid {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}
.footer-links-grid a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition);
}
.footer-links-grid a:hover { color: var(--text-primary); }
.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
    .header-nav { display: none; }
    .mobile-menu-btn { display: block; }
    
    .dashboard-header h1 {
        font-size: 1.8rem;
    }
    .status-pill {
        font-size: 0.75rem;
        padding: 4px 12px;
    }

    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    .tool-group {
        justify-content: center;
        flex-wrap: wrap;
    }
    .action-group {
        justify-content: center;
    }
    .export-bar {
        flex-direction: column;
        align-items: stretch;
    }
    .export-bar button {
        justify-content: center;
        width: 100%;
    }
    .export-hint {
        text-align: center;
    }
    
    .use-case-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-top {
        flex-direction: column;
        gap: 24px;
    }
    .footer-links-grid {
        flex-direction: column;
        gap: 12px;
    }
}