/* Reset and base styles */
* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

h1 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2.2rem;
}

/* Main container */
.cron-builder {
    background: #ffffff;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

/* Field group - responsive grid */
.field-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

/* Individual cron field */
.cron-field {
    margin-bottom: 0;
}

/* Labels */
label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 600;
    font-size: 0.95rem;
    color: #2c3e50;
}

/* Form controls */
select,
input[type="text"],
input[type="number"] {
    padding: 0.75rem 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    width: 100%;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    background-color: #ffffff;
}

select:focus,
input[type="text"]:focus,
input[type="number"]:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

/* Radio button group */
.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: #f8f9fa;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.radio-option:hover {
    background-color: #e9ecef;
}

.radio-option input[type="radio"] {
    width: auto;
    cursor: pointer;
}

/* Special values section */
.special-values {
    margin-top: 0.75rem;
    padding-left: 0.5rem;
    font-size: 0.9rem;
}

.special-values input[type="text"],
.special-values input[type="number"] {
    width: auto;
    display: inline-block;
    margin: 0 0.5rem;
}

.special-values select {
    width: auto;
    display: inline-block;
    margin: 0 0.5rem;
}

/* Range inputs container */
.range-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.range-container input,
.range-container select {
    flex: 1;
    min-width: 100px;
}

/* Cron expression display */
.cron-expression-container {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid #e0e0e0;
}

.cron-expression-container p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: #495057;
}

.cron-expression {
    background: linear-gradient(135deg, #e8f4f8 0%, #d1ecf1 100%);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 0 auto 1.5rem;
    text-align: center;
    font-family: 'Courier New', monospace;
    font-size: 1.5rem;
    font-weight: bold;
    color: #2c3e50;
    word-break: break-all;
    max-width: 90%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

/* Buttons */
.button-container {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

button {
    background: #3498db;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: background-color 0.2s ease, transform 0.1s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

button:hover {
    background: #2980b9;
}

button:active {
    transform: scale(0.98);
}

.copy-btn {
    background: #28a745;
}

.copy-btn:hover {
    background: #218838;
}

/* Explanation section */
.explanation-section {
    background: #ffffff;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.explanation-section h2 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 0.5rem;
}

.explanation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.explanation-item {
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
}

.explanation-item h3 {
    color: #3498db;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.explanation-item p {
    color: #495057;
    margin: 0;
    font-size: 0.95rem;
}

/* Samples section */
.samples-section {
    background: #ffffff;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.samples-section h2 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 0.5rem;
}

.samples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.sample-item {
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #3498db;
}

.sample-item code {
    display: block;
    background: #2c3e50;
    color: #e8f4f8;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.sample-item p {
    color: #495057;
    margin: 0;
    font-size: 0.9rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    body {
        padding: 1.5rem;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    .cron-builder,
    .explanation-section,
    .samples-section {
        padding: 1.5rem;
    }
    
    .field-group {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .radio-group {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .cron-expression {
        font-size: 1.2rem;
        padding: 1rem;
    }
    
    .button-container {
        flex-direction: column;
        align-items: center;
    }
    
    button {
        width: 100%;
        max-width: 300px;
    }
    
    .explanation-grid,
    .samples-grid {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 1200px) {
    .field-group {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .cron-expression {
        font-size: 1.8rem;
        padding: 2rem;
    }
    
    .explanation-grid {
        grid-template-columns: repeat(5, 1fr);
    }
    
    .samples-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Accessibility */
.radio-option input[type="radio"]:focus + label {
    outline: 2px solid #3498db;
    outline-offset: 2px;
}

input:focus,
select:focus {
    outline: 2px solid #3498db;
    outline-offset: 0;
}