/* ============================================
   Kukuzetu Responsive Design System
   Mobile-First Approach
   ============================================ */

/* Typography Scale - Mobile First */
:root {
    /* Mobile Typography (Base) - Reduced sizes */
    --font-h1-mobile: 1.5rem;      /* 24px */
    --font-h2-mobile: 1.25rem;    /* 20px */
    --font-h3-mobile: 1.125rem;   /* 18px */
    --font-body-mobile: 0.9375rem;     /* 15px */
    --font-small-mobile: 0.8125rem; /* 13px */
    --font-xs-mobile: 0.75rem;    /* 12px */
    
    /* Desktop Typography - Reduced sizes */
    --font-h1-desktop: 2rem;      /* 32px */
    --font-h2-desktop: 1.75rem;   /* 28px */
    --font-h3-desktop: 1.5rem;   /* 24px */
    --font-body-desktop: 1rem; /* 16px */
    --font-small-desktop: 0.9375rem;    /* 15px */
    --font-xs-desktop: 0.8125rem;   /* 13px */
    
    /* Spacing Scale */
    --spacing-xs: 0.25rem;   /* 4px */
    --spacing-sm: 0.5rem;    /* 8px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-2xl: 3rem;     /* 48px */
    --spacing-3xl: 4rem;     /* 64px */
    
    /* Container Max Widths */
    --container-sm: 100%;
    --container-md: 100%;
    --container-lg: 1024px;
    --container-xl: 1280px;
}

/* Base Typography - Mobile */
h1 {
    font-size: var(--font-h1-mobile);
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: var(--font-h2-mobile);
    line-height: 1.3;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: var(--font-h3-mobile);
    line-height: 1.4;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

body {
    font-size: var(--font-body-mobile);
    line-height: 1.6;
}

p, li, span, div {
    font-size: var(--font-body-mobile);
    line-height: 1.6;
}

small {
    font-size: var(--font-small-mobile);
}

.text-xs {
    font-size: var(--font-xs-mobile);
}

/* Desktop Typography - 768px and up */
@media (min-width: 768px) {
    h1 {
        font-size: var(--font-h1-desktop);
        margin-bottom: var(--spacing-lg);
    }
    
    h2 {
        font-size: var(--font-h2-desktop);
        margin-bottom: var(--spacing-lg);
    }
    
    h3 {
        font-size: var(--font-h3-desktop);
        margin-bottom: var(--spacing-md);
    }
    
    body {
        font-size: var(--font-body-desktop);
    }
    
    p, li, span, div {
        font-size: var(--font-body-desktop);
    }
    
    small {
        font-size: var(--font-small-desktop);
    }
    
    .text-xs {
        font-size: var(--font-xs-desktop);
    }
}

/* Responsive Container */
.container-responsive {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

@media (min-width: 640px) {
    .container-responsive {
        padding-left: var(--spacing-lg);
        padding-right: var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    .container-responsive {
        max-width: var(--container-lg);
        padding-left: var(--spacing-xl);
        padding-right: var(--spacing-xl);
    }
}

@media (min-width: 1280px) {
    .container-responsive {
        max-width: var(--container-xl);
    }
}

/* Responsive Grid System */
.grid-responsive {
    display: grid;
    gap: var(--spacing-md);
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .grid-responsive {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    .grid-responsive {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-xl);
    }
}

@media (min-width: 1280px) {
    .grid-responsive {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Responsive Product Grid */
.grid-products {
    display: grid;
    gap: var(--spacing-md);
    grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 640px) {
    .grid-products {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}

@media (min-width: 768px) {
    .grid-products {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-products {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-xl);
    }
}

/* Responsive Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-body-mobile);
    font-weight: 500;
    border-radius: 0.5rem;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
    text-decoration: none;
    gap: var(--spacing-xs);
}

.btn-primary {
    background-color: #FF6B35;
    color: white;
}

.btn-primary:hover {
    background-color: #e55a2b;
}

.btn-secondary {
    background-color: #6B7280;
    color: white;
}

.btn-secondary:hover {
    background-color: #4B5563;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-small-mobile);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-h3-mobile);
}

@media (min-width: 768px) {
    .btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-body-desktop);
    }
    
    .btn-sm {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-small-desktop);
    }
    
    .btn-lg {
        padding: var(--spacing-lg) var(--spacing-xl);
        font-size: var(--font-h3-desktop);
    }
}

/* Responsive Cards */
.card {
    background: white;
    border-radius: 0.75rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: var(--spacing-md);
    transition: all 0.2s;
}

.card:hover {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

@media (min-width: 768px) {
    .card {
        padding: var(--spacing-lg);
    }
}

/* Responsive Spacing Utilities */
.mb-responsive {
    margin-bottom: var(--spacing-md);
}

.mt-responsive {
    margin-top: var(--spacing-md);
}

.py-responsive {
    padding-top: var(--spacing-md);
    padding-bottom: var(--spacing-md);
}

.px-responsive {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

@media (min-width: 768px) {
    .mb-responsive {
        margin-bottom: var(--spacing-lg);
    }
    
    .mt-responsive {
        margin-top: var(--spacing-lg);
    }
    
    .py-responsive {
        padding-top: var(--spacing-lg);
        padding-bottom: var(--spacing-lg);
    }
    
    .px-responsive {
        padding-left: var(--spacing-lg);
        padding-right: var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    .mb-responsive {
        margin-bottom: var(--spacing-xl);
    }
    
    .mt-responsive {
        margin-top: var(--spacing-xl);
    }
    
    .py-responsive {
        padding-top: var(--spacing-xl);
        padding-bottom: var(--spacing-xl);
    }
    
    .px-responsive {
        padding-left: var(--spacing-xl);
        padding-right: var(--spacing-xl);
    }
}

/* Responsive Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table-responsive table {
    width: 100%;
    min-width: 640px;
    border-collapse: collapse;
}

@media (min-width: 1024px) {
    .table-responsive table {
        min-width: auto;
    }
}

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

.img-responsive {
    width: 100%;
    height: auto;
    object-fit: cover;
}

/* Responsive Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: var(--font-small-mobile);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: #374151;
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-body-mobile);
    border: 1px solid #D1D5DB;
    border-radius: 0.5rem;
    transition: all 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: #FF6B35;
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

@media (min-width: 768px) {
    .form-label {
        font-size: var(--font-small-desktop);
    }
    
    .form-input {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-body-desktop);
    }
}

/* Responsive Admin Sidebar */
@media (max-width: 1023px) {
    .admin-sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
        position: fixed;
        z-index: 1000;
    }
    
    .admin-sidebar.open {
        transform: translateX(0);
    }
    
    .admin-content {
        margin-left: 0 !important;
        width: 100%;
    }
    
    /* Mobile menu button */
    #mobileMenuButton {
        position: fixed;
        top: 1rem;
        left: 1rem;
        z-index: 1001;
        background-color: #FF6B35;
        color: white;
        padding: 0.75rem;
        border-radius: 0.5rem;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    }
    
    /* Overlay when sidebar is open */
    .admin-sidebar.open::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }
}

/* Responsive Text Alignment */
.text-center-mobile {
    text-align: center;
}

@media (min-width: 768px) {
    .text-center-mobile {
        text-align: left;
    }
}

/* Responsive Visibility */
.hide-mobile {
    display: none;
}

@media (min-width: 768px) {
    .hide-mobile {
        display: block;
    }
    
    .show-mobile {
        display: none;
    }
}

/* Responsive Section Spacing */
.section {
    padding: var(--spacing-xl) 0;
}

@media (min-width: 768px) {
    .section {
        padding: var(--spacing-2xl) 0;
    }
}

@media (min-width: 1024px) {
    .section {
        padding: var(--spacing-3xl) 0;
    }
}

/* Product Card Utilities */
.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}