/**
 * GIFTICITY - Main Frontend Stylesheet
 * Brand: Modern Gift Shop Platform
 */

/* ============================================
   CSS Variables (Brand Colors)
   ============================================ */
:root {
    /* Primary Colors */
    --primary: #E43A8A;
    --primary-hover: #C43A8F;
    --primary-light: #F8E4EF;
    
    /* Secondary Colors */
    --secondary: #7A3E9D;
    --secondary-dark: #5B2D82;
    --secondary-light: #E8DDF0;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --grey-soft: #F5F5F7;
    --grey-light: #E5E5E7;
    --grey: #9A9A9D;
    --grey-dark: #6B6B6E;
    --black: #1A1A1A;
    
    /* Status Colors */
    --success: #28A745;
    --success-light: #D4EDDA;
    --warning: #FFC107;
    --warning-light: #FFF3CD;
    --danger: #DC3545;
    --danger-light: #F8D7DA;
    --info: #17A2B8;
    --info-light: #D1ECF1;
    
    /* Gradient */
    --gradient-primary: linear-gradient(135deg, #E43A8A 0%, #7A3E9D 100%);
    --gradient-secondary: linear-gradient(135deg, #7A3E9D 0%, #5B2D82 100%);
    
    /* Typography */
    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 50%;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   Base Styles
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-secondary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--black);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--black);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-hover);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Primary Button */
.btn-primary {
    background-color: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    color: var(--white);
}

/* Secondary Button */
.btn-secondary {
    background-color: var(--secondary);
    color: var(--white);
    border-color: var(--secondary);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
    color: var(--white);
}

/* Outline Buttons */
.btn-outline-primary {
    background-color: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline-primary:hover:not(:disabled) {
    background-color: var(--primary);
    color: var(--white);
}

.btn-outline-secondary {
    background-color: transparent;
    color: var(--secondary);
    border-color: var(--secondary);
}

.btn-outline-secondary:hover:not(:disabled) {
    background-color: var(--secondary);
    color: var(--white);
}

/* Button Sizes */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Gradient Button */
.btn-gradient {
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
}

.btn-gradient:hover:not(:disabled) {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--black);
}

.form-control {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    color: var(--black);
    background-color: var(--white);
    border: 1px solid var(--grey-light);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-control::placeholder {
    color: var(--grey);
}

.form-control.is-invalid {
    border-color: var(--danger);
}

.invalid-feedback {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: 0.85rem;
    color: var(--danger);
}

/* Select */
.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236B6B6E' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.form-check-input {
    width: 1.2rem;
    height: 1.2rem;
    accent-color: var(--primary);
}

/* ============================================
   Cards
   ============================================ */
.card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

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

.card-body {
    padding: var(--spacing-lg);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.card-text {
    color: var(--grey-dark);
    margin-bottom: var(--spacing-md);
}

/* Product Card */
.product-card {
    position: relative;
}

.product-card .product-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 1;
}

.product-card .product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-card .product-badge {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: var(--radius-sm);
}

.product-card .badge-sale {
    background-color: var(--danger);
    color: var(--white);
}

.product-card .badge-new {
    background-color: var(--primary);
    color: var(--white);
}

.product-card .product-actions {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    opacity: 0;
    transform: translateX(10px);
    transition: all var(--transition-normal);
}

.product-card:hover .product-actions {
    opacity: 1;
    transform: translateX(0);
}

.product-card .product-info {
    padding: var(--spacing-md);
}

.product-card .product-category {
    font-size: 0.75rem;
    color: var(--grey);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.product-card .product-name {
    font-size: 1rem;
    font-weight: 600;
    margin: var(--spacing-xs) 0;
    color: var(--black);
}

.product-card .product-name a {
    color: inherit;
}

.product-card .product-name a:hover {
    color: var(--primary);
}

.product-card .product-price {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
}

.product-card .product-price .original-price {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--grey);
    text-decoration: line-through;
    margin-left: var(--spacing-sm);
}

/* ============================================
   Badges
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-xl);
}

.badge-primary {
    background-color: var(--primary-light);
    color: var(--primary);
}

.badge-secondary {
    background-color: var(--secondary-light);
    color: var(--secondary);
}

.badge-success {
    background-color: var(--success-light);
    color: var(--success);
}

.badge-warning {
    background-color: var(--warning-light);
    color: #856404;
}

.badge-danger {
    background-color: var(--danger-light);
    color: var(--danger);
}

.badge-info {
    background-color: var(--info-light);
    color: var(--info);
}

/* ============================================
   Alerts
   ============================================ */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.alert-success {
    background-color: var(--success-light);
    color: #155724;
    border: 1px solid #C3E6CB;
}

.alert-warning {
    background-color: var(--warning-light);
    color: #856404;
    border: 1px solid #FFEEBA;
}

.alert-danger {
    background-color: var(--danger-light);
    color: #721C24;
    border: 1px solid #F5C6CB;
}

.alert-info {
    background-color: var(--info-light);
    color: #0C5460;
    border: 1px solid #BEE5EB;
}

/* ============================================
   Layout Utilities
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xxl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.section-title p {
    color: var(--grey-dark);
    max-width: 600px;
    margin: 0 auto;
}

/* Grid */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Flexbox */
.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.flex-wrap {
    flex-wrap: wrap;
}

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-muted { color: var(--grey); }

.fw-normal { font-weight: 400; }
.fw-medium { font-weight: 500; }
.fw-semibold { font-weight: 600; }
.fw-bold { font-weight: 700; }

/* Spacing Utilities */
.m-0 { margin: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }

/* Background Utilities */
.bg-primary { background-color: var(--primary); }
.bg-secondary { background-color: var(--secondary); }
.bg-white { background-color: var(--white); }
.bg-grey { background-color: var(--grey-soft); }
.bg-gradient { background: var(--gradient-primary); }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .grid-3,
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
}

@media (max-width: 576px) {
    .grid-2,
    .grid-3,
    .grid-4 { grid-template-columns: 1fr; }
    
    .btn {
        width: 100%;
    }
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.animate-fade-in {
    animation: fadeIn var(--transition-normal) ease-out;
}

.animate-slide-up {
    animation: slideUp var(--transition-normal) ease-out;
}

/* ============================================
   Loading States
   ============================================ */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 3px solid var(--grey-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.skeleton {
    background: linear-gradient(90deg, var(--grey-soft) 25%, var(--grey-light) 50%, var(--grey-soft) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}