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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    min-height: 100vh;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

.header {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.header h1 {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-controls {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
}

.grid-size-controls {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    padding-left: 1rem;
    border-left: 1px solid rgba(255,255,255,0.3);
    margin-left: 0.5rem;
}

.grid-size-controls label {
    font-size: 0.9rem;
    color: white;
}

.grid-size-controls input {
    width: 60px;
    padding: 0.3rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 0.9rem;
}

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    transition: all 0.2s;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn-primary {
    background: #3498db;
    color: white;
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

.btn-info {
    background: #17a2b8;
    color: white;
}

.btn-danger {
    background: #e74c3c;
    color: white;
}

.main-content {
    display: flex;
    height: calc(100vh - 80px);
}

.toolbar {
    width: 280px;
    background: #f8f9fa;
    border-right: 1px solid #dee2e6;
    padding: 1rem;
    overflow-y: auto;
}

.toolbar h3 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

.tool-grid {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.tool-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    background: white;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}

.tool-btn:hover {
    border-color: #3498db;
    background: #f8f9fa;
}

.tool-btn.active {
    border-color: #3498db;
    background: #e3f2fd;
}

.tool-preview {
    width: 30px;
    height: 30px;
    border-radius: 4px;
    flex-shrink: 0;
}

.pitfall-preview {
    background: #8b4513;
    border: 2px solid #654321;
}

.town-center-preview {
    background: #ff6b6b;
    border: 2px solid #ff5252;
}

.banner-preview {
    background: #ffd93d;
    border: 2px solid #ffc107;
}

.mill-preview {
    background: #4ecdc4;
    border: 2px solid #26a69a;
}

.alliance-hq-preview {
    background: #9b59b6;
    border: 2px solid #8e44ad;
}

.blocked-path-1-preview {
    background: #95a5a6;
    border: 2px solid #7f8c8d;
}

.blocked-path-2-preview {
    background: #6c757d;
    border: 2px solid #495057;
}

.grid-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    background: #f8f9fa;
}

.canvas-container {
    border: 2px solid #dee2e6;
    border-radius: 8px;
    background: white;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    overflow: auto;
    max-width: 800px;
    max-height: 600px;
    -webkit-overflow-scrolling: touch;
    position: relative;
}

#territory-grid {
    cursor: crosshair;
    display: block;
}

.grid-info {
    margin-top: 1rem;
    width: 100%;
    max-width: 800px;
}

.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.legend-color {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: 1px solid #ccc;
}

.alliance-territory {
    background: #3498db;
}

.buildable-area {
    background: #2ecc71;
}

.valid-placement {
    background: rgba(46, 204, 113, 0.6);
}

.invalid-placement {
    background: rgba(231, 76, 60, 0.6);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
}

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    position: relative;
}

.modal-content.large {
    max-width: 800px;
}

.close {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 2rem;
    cursor: pointer;
    color: #aaa;
}

.close:hover {
    color: #333;
}

.modal h2 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

#import-text-area,
#export-text-area {
    width: 100%;
    height: 120px;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: monospace;
    resize: vertical;
}

.modal-buttons {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
}

#sample-layouts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
    margin: 1rem 0;
}

.sample-layout-item {
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.2s;
}

.sample-layout-item:hover {
    border-color: #3498db;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.sample-layout-item h4 {
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.sample-layout-item p {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0.5rem;
}

.sample-layout-code {
    font-family: monospace;
    font-size: 0.8rem;
    background: #f8f9fa;
    padding: 0.5rem;
    border-radius: 4px;
    word-break: break-all;
    color: #666;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
        height: auto;
    }
    
    .toolbar {
        width: 100%;
        max-height: 250px;
        order: 2;
    }
    
    .grid-container {
        order: 1;
        padding: 0.5rem;
    }
    
    .canvas-container {
        max-width: calc(100vw - 1rem);
        max-height: calc(100vh - 350px);
    }
    
    #territory-grid {
        touch-action: none;
    }
    
    .header {
        padding: 0.5rem 1rem;
        flex-direction: column;
        text-align: center;
    }
    
    .header h1 {
        font-size: 1.2rem;
    }
    
    .header-controls {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .grid-size-controls {
        border-left: none;
        padding-left: 0;
        margin-left: 0;
        margin-top: 0.5rem;
        flex-basis: 100%;
        justify-content: center;
    }
    
    .legend {
        justify-content: flex-start;
        font-size: 0.8rem;
    }
    
    .tool-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
        gap: 0.5rem;
        max-height: 200px;
        overflow-y: auto;
    }
    
    .tool-btn {
        flex-direction: column;
        padding: 0.5rem;
        text-align: center;
        gap: 0.3rem;
    }
    
    .tool-btn span {
        font-size: 0.75rem;
        line-height: 1.2;
    }
}

@media (max-width: 480px) {
    .header-controls {
        justify-content: center;
    }
    
    .btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
    
    .modal-content {
        margin: 10% auto;
        padding: 1rem;
        width: 95%;
    }
    
    #sample-layouts-grid {
        grid-template-columns: 1fr;
    }
}