/* Mobile-First Responsive Styles */

/* Base Mobile Styles (320px+) */
* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Touch-friendly buttons */
button, a, input[type="button"], input[type="submit"] {
    min-height: 44px;
    min-width: 44px;
    touch-action: manipulation;
}

/* Forms */
input, textarea, select {
    font-size: 16px; /* Prevents zoom on iOS */
    padding: 12px;
    border-radius: 8px;
}

/* Images */
img {
    max-width: 100%;
    height: auto;
}

/* Tables responsive */
table {
    width: 100%;
    overflow-x: auto;
    display: block;
}

/* Cards */
.card {
    padding: 16px;
    margin-bottom: 16px;
}

/* Navigation mobile */
.mobile-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
    display: flex;
    justify-content: space-around;
    padding: 8px 0;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 12px;
    font-size: 12px;
}

/* Hide desktop menu on mobile */
@media (max-width: 768px) {
    .desktop-only {
        display: none !important;
    }
    
    /* Stack elements vertically */
    .flex-row-desktop {
        flex-direction: column;
    }
    
    /* Full width containers */
    .container-mobile {
        padding: 12px;
        width: 100%;
    }
    
    /* Product grid */
    .product-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    /* Admin tables */
    .admin-table {
        font-size: 12px;
    }
    
    .admin-table td, .admin-table th {
        padding: 8px 4px;
    }
    
    /* Modal full screen on mobile */
    .modal {
        width: 100% !important;
        height: 100% !important;
        max-width: 100% !important;
        border-radius: 0 !important;
    }
    
    /* Text sizes */
    h1 { font-size: 24px; }
    h2 { font-size: 20px; }
    h3 { font-size: 18px; }
    
    /* Padding adjustments */
    .px-large { padding-left: 16px; padding-right: 16px; }
    .py-large { padding-top: 16px; padding-bottom: 16px; }
}

/* Small tablets (576px+) */
@media (min-width: 576px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Tablets (768px+) */
@media (min-width: 768px) {
    .mobile-only {
        display: none !important;
    }
    
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    body {
        font-size: 16px;
    }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
    .product-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Loading spinner */
.loading-spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid #f59e0b;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

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

/* Error message */
.error-message {
    background: #fee;
    border: 1px solid #fcc;
    color: #c33;
    padding: 12px;
    border-radius: 8px;
    margin: 12px 0;
}

.success-message {
    background: #efe;
    border: 1px solid #cfc;
    color: #3c3;
    padding: 12px;
    border-radius: 8px;
    margin: 12px 0;
}

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

/* Focus states */
*:focus-visible {
    outline: 2px solid #f59e0b;
    outline-offset: 2px;
}

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

/* Safe area for iOS notch */
@supports (padding: max(0px)) {
    body {
        padding-left: max(0px, env(safe-area-inset-left));
        padding-right: max(0px, env(safe-area-inset-right));
    }
    
    .mobile-nav {
        padding-bottom: max(8px, env(safe-area-inset-bottom));
    }
}