:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --primary-light: #eef2ff;
    --secondary: #6c757d;
    --success: #4cc9f0;
    --danger: #f72585;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --border-radius: 8px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
    color: var(--dark);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
    height: calc(100vh - 40px);
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 24px;
    color: var(--primary);
}

.logo i {
    font-size: 28px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--gray);
    font-size: 14px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 24px;
    height: calc(100% - 120px);
}

.controls-panel {
    background: white;
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.panel-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
}

.panel-subtitle {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 16px;
}

.file-upload-area {
    border: 2px dashed var(--gray-light);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--light);
    margin-bottom: 16px;
}

.file-upload-area:hover {
    border-color: var(--primary);
    background: rgba(67, 97, 238, 0.05);
}

.upload-icon {
    font-size: 32px;
    color: var(--primary);
    margin-bottom: 8px;
}

.upload-text {
    font-size: 14px;
    color: var(--gray);
}

.upload-text strong {
    color: var(--primary);
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.control-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: white;
    border: 1px solid var(--gray-light);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
    color: var(--dark);
}

.donate-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--danger);
    border: 1px solid var(--gray-light);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
    color: white;
}

.control-btn:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.control-btn.primary {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.control-btn.primary:hover {
    background: var(--primary-dark);
}

.control-btn.danger {
    background: white;
    color: var(--danger);
    border-color: var(--danger);
}

.control-btn.danger:hover {
    background: var(--danger);
    color: white;
}

.control-icon {
    font-size: 16px;
}

.workspace {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.workspace-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--gray-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.workspace-title {
    font-size: 18px;
    font-weight: 600;
}

.workspace-info {
    display: flex;
    gap: 16px;
    font-size: 14px;
    color: var(--gray);
}

.canvas-container {
    flex: 1;
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f9fafb;
    overflow: auto;
    height: 600px; /* Altezza fissa */
    min-height: 600px;
    max-height: 600px;
}

canvas {
    background: white;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    max-width: 100%;
    max-height: 100%;
    cursor: crosshair;
    object-fit: contain; /* L'immagine si adatta mantenendo le proporzioni */
}

.label-input {
    position: absolute;
    background: white;
    border: 2px solid var(--primary);
    padding: 4px 8px;
    font-size: 14px;
    outline: none;
    min-width: 80px;
    border-radius: 4px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    z-index: 10;
}

.status-bar {
    background: white;
    border-radius: var(--border-radius);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--gray);
    box-shadow: var(--shadow);
}

.status-info {
    display: flex;
    gap: 24px;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .controls-panel {
        order: 2;
    }
    
    .workspace {
        order: 1;
    }
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .app-container {
        height: auto;
    }
    
    .main-content {
        height: auto;
    }
    
    .canvas-container {
        height: auto;
        min-height: 400px;
        padding: 12px;
    }
    
    canvas {
        max-width: 100%;
        height: auto;
        display: block;
    }
    
    .workspace-header {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }
    
    .controls-panel {
        padding: 16px;
    }
}

@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }

    .status-bar {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .status-info {
        flex-wrap: wrap;
        gap: 12px;
    }
}

.main-nav {
    display: flex;
    gap: 16px;
    align-items: center;
}

.nav-link {
    padding: 8px 16px;
    text-decoration: none;
    color: var(--gray);
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-link:hover {
    background: var(--light);
    color: var(--primary);
}

.nav-link.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

.nav-link.donate {
    background: var(--danger);
    color: white;
}

.nav-link.donate:hover {
    background: #d61f6a;
}