/* ============================================ */
/*   BASE STYLES - використовує variables.css  */
/* ============================================ */

/* Reset */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

*::before,
*::after {
    box-sizing: border-box;
}

/* Base Elements */
html {
    font-size: 16px;
    line-height: 1.5;
    scroll-behavior: smooth;
    height: 100%;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--neutral-dark);
    background-color: var(--color-bg-primary);
    min-height: 100vh;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--neutral-dark);
}

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

a:hover,
a:focus {
    color: var(--color-brand-accent);
    text-decoration: none;
}

a,
a:hover,
a:focus,
a:active,
a:visited {
    text-decoration: none;
}

.nav-link,
.cart-link,
.wishlist-link,
.footer-links a,
.contact-item a {
    text-decoration: none;
}

.nav-link:hover,
.cart-link:hover,
.wishlist-link:hover,
.footer-links a:hover,
.contact-item a:hover {
    text-decoration: none;
}

ul,
ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

li {
    margin-bottom: var(--spacing-xs);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    user-select: none;
    -webkit-appearance: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.btn:focus {
    outline: 2px solid var(--color-brand-primary);
    outline-offset: 2px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-brand-primary) 0%, var(--color-brand-light) 100%);
    color: var(--white);
    border-color: var(--color-brand-primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-brand-accent) 0%, var(--color-brand-primary) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--white);
    color: var(--neutral-dark);
    border-color: var(--neutral-light);
}

.btn-secondary:hover {
    background: var(--gray-light);
    border-color: var(--color-brand-primary);
    color: var(--color-brand-primary);
}

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

.btn-outline:hover {
    background: var(--color-brand-primary);
    color: var(--white);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.125rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Forms */
.form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--neutral-dark);
    background: var(--white);
    border: 2px solid var(--neutral-light);
    border-radius: var(--border-radius-md);
    transition: border-color var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-brand-primary);
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

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

.form-control:disabled {
    background: var(--gray-light);
    color: var(--gray-medium);
    cursor: not-allowed;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-select {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
    -webkit-appearance: none;
    appearance: none;
}

/* Cards */
.card {
    background: var(--white);
    border: 1px solid var(--neutral-light);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

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

/* Alerts */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border: 1px solid transparent;
    border-radius: var(--border-radius-md);
    position: relative;
}

.alert-success {
    background: var(--success);
    color: var(--white);
    border-color: var(--success);
}

.alert-warning {
    background: var(--warning);
    color: var(--neutral-dark);
    border-color: var(--warning);
}

.alert-danger {
    background: var(--danger);
    color: var(--white);
    border-color: var(--danger);
}

.alert-info {
    background: var(--info);
    color: var(--white);
    border-color: var(--info);
}

.alert-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: transparent;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.alert-close:hover {
    opacity: 1;
}

/* Animations */
.fade-in {
    animation: fadeIn 0.6s ease-in-out;
}

.slide-in-up {
    animation: slideInUp 0.6s ease-out;
}

@keyframes fadeIn {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

@keyframes slideInUp {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Common Utilities */
.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.flex-col-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.touch-target {
    min-height: 48px;
    min-width: 48px;
}

.touch-target-sm {
    min-height: 44px;
    min-width: 44px;
}

/* Utility Classes */
.d-none {
    display: none;
}

.d-block {
    display: block;
}

.d-flex {
    display: flex;
}

.d-inline-block {
    display: inline-block;
}

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.text-white {
    color: var(--white);
}

.text-muted {
    color: var(--gray-medium);
}

.bg-primary {
    background-color: var(--color-brand-primary);
}

.bg-light {
    background-color: var(--gray-light);
}

.bg-white {
    background-color: var(--white);
}

/* Margins */
.mb-0 {
    margin-bottom: 0;
}

.mb-1 {
    margin-bottom: var(--spacing-xs);
}

.mb-2 {
    margin-bottom: var(--spacing-sm);
}

.mb-3 {
    margin-bottom: var(--spacing-md);
}

.mb-4 {
    margin-bottom: var(--spacing-lg);
}

.mb-5 {
    margin-bottom: var(--spacing-xl);
}

.mt-0 {
    margin-top: 0;
}

.mt-1 {
    margin-top: var(--spacing-xs);
}

.mt-2 {
    margin-top: var(--spacing-sm);
}

.mt-3 {
    margin-top: var(--spacing-md);
}

.mt-4 {
    margin-top: var(--spacing-lg);
}

.mt-5 {
    margin-top: var(--spacing-xl);
}

/* Padding */
.p-0 {
    padding: 0;
}

.p-1 {
    padding: var(--spacing-xs);
}

.p-2 {
    padding: var(--spacing-sm);
}

.p-3 {
    padding: var(--spacing-md);
}

.p-4 {
    padding: var(--spacing-lg);
}

.p-5 {
    padding: var(--spacing-xl);
}

/* Sizing */
.w-100 {
    width: 100%;
}

.h-100 {
    height: 100%;
}

/* Positioning */
.position-relative {
    position: relative;
}

.position-absolute {
    position: absolute;
}

.position-sticky {
    position: sticky;
}

/* Flexbox */
.justify-content-center {
    justify-content: center;
}

.align-items-center {
    align-items: center;
}

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

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--neutral-dark);
}

.section-subtitle {
    font-size: 1.125rem;
    text-align: center;
    color: var(--gray-medium);
    margin-bottom: var(--spacing-xl);
}

/* Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-brand-primary);
    color: var(--white);
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    transition: top var(--transition-fast);
    z-index: 1000;
}

.skip-link:focus {
    top: 0;
}

/* Mobile Responsive */
@media (max-width: 575.98px) {
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    h3 {
        font-size: 1.25rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .section-padding {
        padding: var(--spacing-xl) 0;
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        min-height: 44px;
    }
    
    .form-control {
        padding: var(--spacing-sm);
        font-size: 16px;
        min-height: 44px;
    }
}