body { 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; 
    margin: 0; 
    padding: 15px;
    background: #f8f9fa; 
}

.container { 
    width: 100%; 
    max-width: 100%; 
    box-sizing: border-box; /* Crucial: stops padding from breaking 100% width rules */
    background: #fff; 
    padding: 20px 30px; 
    border-radius: 8px; 
    box-shadow: 0 4px 6px rgba(0,0,0,0.05); 
}

.data-table { 
    border-collapse: collapse; 
    background: #fff; 
    margin-top: 0;
}

.data-table th, .data-table td { 
    padding: 8px 12px; 
    border: 1px solid #e0e0e0; 
}

.data-table th { 
    background: #34495e; 
    color: #fff; 
    font-weight: 600;
    text-align: center;
}

.plane-badge { 
    background: #4CAF50; 
    color: white; 
    padding: 2px 6px; 
    border-radius: 3px; 
    font-size: 0.8rem; 
    font-weight: bold; 
    display: inline-block;
}

.data-table tbody tr:nth-child(even) {
    background-color: #fafafa;
}


/* 1. Hide the tiny, unstylable native browser button */
.custom-file-input {
    display: none;
}

/* 2. Style our custom label to look like a large, premium button */
.custom-file-label {
    display: inline-block;
    padding: 8px 16px;       /* Moderated padding */
    font-size: 0.95rem;      /* Scaled down slightly */
    font-weight: bold;
    color: #fff;
    background-color: #34495e;
    border-radius: 5px;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    transition: all 0.2s ease;
    user-select: none;
}

/* 3. Subtle feedback effects when a user interacts with it */
.custom-file-label:hover {
    background-color: #2c3e50;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.15);
}

.custom-file-label:active {
    transform: translateY(1px);
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}