/* Enhanced styling for the DNSSEC Validator */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    margin: 0;
    padding: 2em;
    background-color: #f5f5f5;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    padding: 2em;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h1 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 1.5em;
}

#dnssec-form {
    display: flex;
    gap: 10px;
    margin-bottom: 2em;
    align-items: center;
}

#domain-input {
    flex-grow: 1;
    padding: 12px 16px;
    border: 2px solid #ddd;
    border-radius: 6px;
    font-size: 16px;
    transition: border-color 0.3s;
}

#domain-input:focus {
    outline: none;
    border-color: #3498db;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #2980b9;
}

#results-container {
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 1.5em;
    background-color: #fafafa;
    min-height: 100px;
}

.status-valid {
    color: #27ae60;
    font-weight: bold;
}

.status-invalid {
    color: #e74c3c;
    font-weight: bold;
}

.status-error {
    color: #f39c12;
    font-weight: bold;
}

.chain-item {
    margin: 8px 0;
    padding: 8px;
    background: white;
    border-radius: 4px;
    border-left: 4px solid #3498db;
}

.error-item {
    margin: 8px 0;
    padding: 8px;
    background: #fdf2f2;
    border-radius: 4px;
    border-left: 4px solid #e74c3c;
    color: #c53030;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    body {
        padding: 1em;
    }
    
    .container {
        padding: 1.5em;
        margin: 0;
        border-radius: 0;
        box-shadow: none;
    }
    
    h1 {
        font-size: 1.8rem;
        margin-bottom: 1rem;
    }
    
    #dnssec-form {
        flex-direction: column;
        gap: 15px;
    }
    
    #domain-input {
        width: 100%;
        box-sizing: border-box;
        font-size: 16px; /* Prevents zoom on iOS */
        padding: 14px 16px;
    }
    
    button {
        width: 100%;
        padding: 16px 24px;
        font-size: 16px;
        min-height: 44px; /* Touch target size */
        box-sizing: border-box;
    }
    
    #results-container {
        padding: 1em;
        margin-top: 1.5em;
    }
}

@media (max-width: 480px) {
    body {
        padding: 0.5em;
    }
    
    .container {
        padding: 1em;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    #dnssec-form {
        gap: 12px;
    }
    
    button {
        padding: 16px 20px;
        font-size: 15px;
    }
    
    #domain-input {
        padding: 14px 12px;
    }
    
    .chain-item,
    .error-item {
        padding: 12px 8px;
        font-size: 14px;
    }
}

/* Landscape orientation on small screens */
@media (max-width: 768px) and (orientation: landscape) {
    #dnssec-form {
        flex-direction: row;
        align-items: center;
    }
    
    button {
        width: auto;
        min-width: 120px;
        flex-shrink: 0;
    }
    
    #domain-input {
        flex-grow: 1;
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    button,
    #domain-input {
        border-width: 0.5px;
    }
}