/* ===============================================
   🎅 SANTA CLAUDE'S UI/UX IMPROVEMENTS
   Ho ho ho! Making your site beautiful!
   =============================================== */

/* Mobile-First Responsive Design */
@media screen and (max-width: 768px) {
    .container, .main-container {
        padding: 1rem !important;
        margin: 0 auto;
        max-width: 100%;
    }
    
    .calculator-container, .converter-container {
        padding: 1rem;
        margin: 0.5rem 0;
    }
    
    .input-group, .form-group {
        flex-direction: column;
        gap: 0.75rem;
        margin-bottom: 1rem;
    }
    
    input, select, textarea {
        width: 100% !important;
        padding: 0.75rem !important;
        font-size: 16px !important; /* Prevents zoom on iOS */
        border-radius: 6px;
        border: 2px solid #e0e0e0;
        transition: border-color 0.3s ease;
        min-height: 48px; /* Touch-friendly */
    }
    
    button, .btn {
        width: 100% !important;
        padding: 0.875rem !important;
        font-size: 16px !important;
        min-height: 48px !important; /* Touch-friendly */
        margin: 0.25rem 0;
    }
    
    .results, .output, .result {
        margin-top: 1.5rem;
        padding: 1rem;
        font-size: 14px;
    }
    
    /* Category showcase mobile */
    .calculator-categories {
        grid-template-columns: 1fr !important;
        gap: 1rem !important;
    }
    
    .category-card {
        padding: 1.5rem !important;
        margin: 0.5rem 0;
    }
    
    /* Navigation mobile */
    .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 0.5rem;
    }
    
    /* Hero sections */
    .hero {
        padding: 2rem 1rem !important;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2rem !important;
    }
}

/* Enhanced Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus indicators */
input:focus, button:focus, select:focus, textarea:focus {
    outline: 3px solid #4A90E2 !important;
    outline-offset: 2px;
    border-color: #4A90E2 !important;
}

/* Enhanced Button Styling */
button, .btn {
    cursor: pointer;
    transition: all 0.3s ease;
    transform: translateY(0);
    position: relative;
    border-radius: 6px;
}

button:hover:not(:disabled), .btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    filter: brightness(110%);
}

button:active, .btn:active {
    transform: translateY(0);
}

/* Loading States */
.loading {
    opacity: 0.7 !important;
    cursor: not-allowed !important;
    pointer-events: none;
}

.loading::after {
    content: '⏳';
    margin-left: 0.5rem;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Enhanced Results Display */
.results, .output, .result {
    margin-top: 2rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
}

.results.show, .output.show, .result.show {
    opacity: 1;
    transform: translateY(0);
}

/* Performance Optimizations */
img {
    max-width: 100%;
    height: auto;
    loading: lazy;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Enhanced Visual Feedback */
.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* Form Improvements */
.form-group {
    margin-bottom: 1.5rem;
}

input[type="number"], input[type="text"], select {
    padding: 0.75rem;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    transition: all 0.3s ease;
}

input:focus, select:focus {
    border-color: #4A90E2;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}