/* Nature's Diet Calculator - Scoped Styles */
/* All classes prefixed with .nd-calc- to prevent conflicts */

:root {
    /* Brand Colors - Update these to match naturesdietpet.com */
    --nd-primary: #FC5c00; /* Neon Orange - adjusted to match brand */
    --nd-primary-light: #FD6d11;
    --nd-primary-dark: #1a3009;
    --nd-accent: #F2BD1E; /* Gold - adjusted to match brand */
    --nd-text: #333333;
    --nd-text-light: #666666;
    --nd-bg: #ffffff;
    --nd-bg-light: #f8f9fa;
    --nd-border: #e0e0e0;
    --nd-border-focus: var(--nd-primary);
    --nd-error: #d32f2f;
    --nd-success: #2e7d32;
    
    /* Spacing */
    --nd-spacing-xs: 0.5rem;
    --nd-spacing-sm: 0.75rem;
    --nd-spacing-md: 1rem;
    --nd-spacing-lg: 1.5rem;
    --nd-spacing-xl: 2rem;
    
    /* Typography */
    --nd-font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --nd-font-size-base: 16px;
    --nd-font-size-sm: 14px;
    --nd-font-size-lg: 18px;
    --nd-font-size-xl: 24px;
    --nd-font-size-xxl: 28px;
    
    /* Border radius */
    --nd-radius: 8px;
    --nd-radius-sm: 4px;
    
    /* Shadows */
    --nd-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --nd-shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
}

* {
    box-sizing: border-box;
}

.nd-calc-container {
    width: 100%;
    min-height: 100vh;
    background: var(--nd-bg-light);
    padding: var(--nd-spacing-md);
    font-family: var(--nd-font-family);
    font-size: var(--nd-font-size-base);
    line-height: 1.5;
    color: var(--nd-text);
}

.nd-calc-wrapper {
    max-width: 600px;
    margin: 0 auto;
    background: var(--nd-bg);
    border-radius: var(--nd-radius);
    box-shadow: var(--nd-shadow-lg);
    overflow: hidden;
}

/* Header */
.nd-calc-header {
    background: linear-gradient(135deg, var(--nd-primary) 0%, var(--nd-primary-light) 100%);
    color: white;
    padding: var(--nd-spacing-xl);
    text-align: center;
}

.nd-calc-title {
    margin: 0 0 var(--nd-spacing-sm) 0;
    font-size: var(--nd-font-size-xxl);
    font-weight: 700;
    line-height: 1.2;
}

.nd-calc-subtitle {
    margin: 0;
    font-size: var(--nd-font-size-base);
    opacity: 0.95;
    font-weight: 400;
}

/* Form */
.nd-calc-form {
    padding: var(--nd-spacing-xl);
}

.nd-calc-field-group {
    margin-bottom: var(--nd-spacing-lg);
}

.nd-calc-label {
    display: block;
    margin-bottom: var(--nd-spacing-sm);
    font-weight: 600;
    color: var(--nd-text);
    font-size: var(--nd-font-size-base);
}

.nd-calc-input,
.nd-calc-select {
    width: 100%;
    padding: var(--nd-spacing-md);
    font-size: var(--nd-font-size-base);
    font-family: var(--nd-font-family);
    border: 2px solid var(--nd-border);
    border-radius: var(--nd-radius-sm);
    background: var(--nd-bg);
    color: var(--nd-text);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    -webkit-appearance: none;
    appearance: none;
}

.nd-calc-input:focus,
.nd-calc-select:focus {
    outline: none;
    border-color: var(--nd-border-focus);
    box-shadow: 0 0 0 3px rgba(45, 80, 22, 0.1);
}

.nd-calc-input:invalid:not(:placeholder-shown) {
    border-color: var(--nd-error);
}

/* Weight input with unit toggle */
.nd-calc-weight-input-group {
    display: flex;
    gap: var(--nd-spacing-sm);
    align-items: stretch;
}

.nd-calc-weight-input-group .nd-calc-input {
    flex: 1;
}

.nd-calc-unit-toggle {
    display: flex;
    border: 2px solid var(--nd-border);
    border-radius: var(--nd-radius-sm);
    overflow: hidden;
    background: var(--nd-bg-light);
}

.nd-calc-unit-btn {
    padding: var(--nd-spacing-md) var(--nd-spacing-lg);
    font-size: var(--nd-font-size-base);
    font-weight: 600;
    border: none;
    background: transparent;
    color: var(--nd-text-light);
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 60px;
    touch-action: manipulation;
}

.nd-calc-unit-btn:hover {
    background: var(--nd-bg);
    color: var(--nd-text);
}

.nd-calc-unit-btn.active {
    background: var(--nd-primary);
    color: white;
}

.nd-calc-unit-btn:focus {
    outline: 2px solid var(--nd-border-focus);
    outline-offset: 2px;
}

/* Select styling */
.nd-calc-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--nd-spacing-md) center;
    background-size: 12px;
    padding-right: calc(var(--nd-spacing-md) * 3);
    cursor: pointer;
}

/* Error message */
.nd-calc-error {
    display: block;
    margin-top: var(--nd-spacing-xs);
    font-size: var(--nd-font-size-sm);
    color: var(--nd-error);
    min-height: 1.25rem;
}

/* Button */
.nd-calc-button {
    width: 100%;
    padding: var(--nd-spacing-md) var(--nd-spacing-xl);
    font-size: var(--nd-font-size-lg);
    font-weight: 600;
    font-family: var(--nd-font-family);
    color: white;
    background: var(--nd-primary);
    border: none;
    border-radius: var(--nd-radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: var(--nd-spacing-md);
    touch-action: manipulation;
    min-height: 48px; /* Touch-friendly */
}

.nd-calc-button:hover {
    background: var(--nd-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--nd-shadow);
}

.nd-calc-button:active {
    transform: translateY(0);
}

.nd-calc-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(45, 80, 22, 0.3);
}

.nd-calc-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.nd-calc-button-secondary {
    background: var(--nd-bg-light);
    color: var(--nd-primary);
    border: 2px solid var(--nd-primary);
}

.nd-calc-button-secondary:hover {
    background: var(--nd-primary);
    color: white;
}

/* Results */
.nd-calc-results {
    padding: var(--nd-spacing-xl);
    border-top: 1px solid var(--nd-border);
    background: var(--nd-bg-light);
}

.nd-calc-results-header {
    margin-bottom: var(--nd-spacing-lg);
}

.nd-calc-results-title {
    margin: 0;
    font-size: var(--nd-font-size-xl);
    font-weight: 700;
    color: var(--nd-primary);
}

.nd-calc-results-content {
    background: var(--nd-bg);
    border-radius: var(--nd-radius-sm);
    padding: var(--nd-spacing-lg);
    margin-bottom: var(--nd-spacing-lg);
}

.nd-calc-result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--nd-spacing-md) 0;
    border-bottom: 1px solid var(--nd-border);
}

.nd-calc-result-item:last-child {
    border-bottom: none;
}

.nd-calc-result-label {
    font-weight: 600;
    color: var(--nd-text);
}

.nd-calc-result-value {
    font-size: var(--nd-font-size-lg);
    font-weight: 700;
    color: var(--nd-primary);
}

/* Disclaimer */
.nd-calc-disclaimer {
    background: #fff9e6;
    border-left: 4px solid var(--nd-accent);
    padding: var(--nd-spacing-md);
    border-radius: var(--nd-radius-sm);
    margin-bottom: var(--nd-spacing-lg);
}

.nd-calc-disclaimer p {
    margin: 0;
    font-size: var(--nd-font-size-sm);
    color: var(--nd-text);
    line-height: 1.6;
}

.nd-calc-disclaimer strong {
    color: var(--nd-primary);
}

/* Responsive Design */
@media (max-width: 480px) {
    .nd-calc-container {
        padding: var(--nd-spacing-sm);
    }
    
    .nd-calc-header {
        padding: var(--nd-spacing-lg);
    }
    
    .nd-calc-title {
        font-size: var(--nd-font-size-xl);
    }
    
    .nd-calc-form,
    .nd-calc-results {
        padding: var(--nd-spacing-lg);
    }
    
    .nd-calc-weight-input-group {
        flex-direction: column;
    }
    
    .nd-calc-unit-toggle {
        width: 100%;
    }
    
    .nd-calc-unit-btn {
        flex: 1;
    }
}

/* Print styles */
@media print {
    .nd-calc-container {
        background: white;
        padding: 0;
    }
    
    .nd-calc-wrapper {
        box-shadow: none;
    }
    
    .nd-calc-button {
        display: none;
    }
}