/* ============================================================
   MusicStore UX Polish — interactions, mobile, performance cues
   ============================================================ */

/* --- Typography refinement --- */
.ms-main-content,
.ms-product-card__title,
.ms-product-description,
#tab-description,
.tab-content {
    line-height: 1.65;
    letter-spacing: 0.01em;
}

.ms-product-card__title {
    font-size: 15px;
    line-height: 1.4;
}

.ms-product-card__title a {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* --- Live search --- */
.ms-search-wrapper.is-loading .ms-search-btn {
    color: var(--ms-accent);
}

.ms-search-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.ms-spinner {
    width: 22px;
    height: 22px;
    border: 2px solid var(--ms-surface-2);
    border-top-color: var(--ms-accent);
    border-radius: 50%;
    animation: ms-spin 0.7s linear infinite;
}

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

.ms-search-empty {
    padding: 20px;
    text-align: center;
    color: var(--ms-text-muted);
    font-size: 14px;
}

.ms-search-list {
    padding: 6px 0;
}

.ms-search-item.is-active,
.ms-search-item:focus {
    background-color: var(--ms-surface-2);
    outline: none;
}

.ms-search-item__img--placeholder {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: var(--ms-surface-2);
    border-radius: 4px;
    flex-shrink: 0;
}

.ms-search-footer {
    display: block;
    padding: 12px 20px;
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--ms-accent);
    border-top: 1px solid var(--ms-surface-2);
    transition: var(--ms-transition);
}

.ms-search-footer:hover {
    background: var(--ms-surface-2);
}

/* --- Cart / wishlist bounce --- */
@keyframes ms-bounce {
    0% {
        transform: scale(1);
    }
    30% {
        transform: scale(1.18);
    }
    50% {
        transform: scale(0.94);
    }
    70% {
        transform: scale(1.08);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes ms-icon-flash {
    0% {
        color: inherit;
    }
    40% {
        color: var(--ms-accent);
    }
    100% {
        color: inherit;
    }
}

.ms-cart-bounce {
    animation: ms-bounce 0.65s ease;
}

.ms-cart-icon-flash {
    animation: ms-icon-flash 0.65s ease;
}

#cart > button.ms-cart-bounce,
#wishlist-total.ms-cart-bounce {
    will-change: transform;
}

/* --- Sticky header --- */
.ms-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: box-shadow 0.25s ease, background-color 0.25s ease;
}

.ms-header.is-sticky {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    background-color: rgba(11, 13, 16, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.ms-header.is-sticky .ms-header__main {
    padding-top: 8px;
    padding-bottom: 8px;
}

/* --- Mobile nav drawer --- */
.ms-nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: 980;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.ms-nav-overlay.is-active {
    opacity: 1;
    visibility: visible;
}

body.ms-nav-open {
    overflow: hidden;
}

.ms-mobile-menu-toggle {
    min-width: 44px;
    min-height: 44px;
    display: none;
    align-items: center;
    justify-content: center;
    border-radius: var(--ms-radius-sm);
    transition: var(--ms-transition);
}

.ms-mobile-menu-toggle:hover,
.ms-mobile-menu-toggle:focus-visible {
    background: var(--ms-surface-2);
    color: var(--ms-accent);
    outline: none;
}

.ms-mobile-menu-toggle.is-active {
    color: var(--ms-accent);
}

@media (max-width: 992px) {
    .ms-mobile-menu-toggle {
        display: inline-flex;
    }

    .ms-navigation {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: min(86vw, 340px);
        max-width: 340px;
        background: var(--ms-surface);
        border-right: 1px solid var(--ms-surface-2);
        z-index: 990;
        transform: translateX(-105%);
        transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        padding: 72px 0 32px;
        box-shadow: 8px 0 32px rgba(0, 0, 0, 0.4);
    }

    .ms-navigation.is-open {
        display: block;
        transform: translateX(0);
    }

    .ms-navigation .ms-container {
        display: block;
        padding: 0 8px 0 4px;
    }

    .ms-mega-menu__list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .ms-mega-menu__link {
        padding: 16px 18px;
        font-size: 15px;
        min-height: 48px;
        display: flex;
        align-items: center;
        border-radius: var(--ms-radius-sm);
    }

    .ms-mega-menu__link:active {
        background: var(--ms-surface-2);
    }

    .ms-mega-menu__item--dropdown > .ms-mega-menu__link::after {
        content: '\f107';
        font-family: 'FontAwesome';
        margin-left: auto;
        display: inline-block;
        transition: transform 0.2s ease;
    }

    .ms-mega-menu__item--dropdown.is-open > .ms-mega-menu__link::after {
        transform: rotate(180deg);
    }

    .ms-mega-menu__panel {
        position: static;
        display: none;
        box-shadow: none;
        border: none;
        border-left: 3px solid var(--ms-accent);
        border-radius: 0;
        padding: 4px 0 12px 12px;
        margin: 0 0 4px 12px;
        min-width: 0;
        background: transparent;
    }

    .ms-mega-menu__item--dropdown.is-open .ms-mega-menu__panel {
        display: block;
    }

    .ms-mega-menu__item--dropdown:hover .ms-mega-menu__panel {
        display: none;
    }

    .ms-mega-menu__item--dropdown.is-open:hover .ms-mega-menu__panel {
        display: block;
    }

    .ms-mega-menu__columns {
        flex-direction: column;
    }

    .ms-mega-menu__sublink a {
        padding: 12px 8px;
        min-height: 44px;
        display: flex;
        align-items: center;
    }
}

/* --- Product grid: 2 columns on mobile --- */
@media (max-width: 768px) {
    .ms-product-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
        gap: 10px 8px;
    }

    .ms-product-card__info {
        padding: 12px 10px 14px;
    }

    .ms-product-card__title {
        font-size: 13px;
        margin-bottom: 6px;
    }

    .ms-product-card__price-main,
    .ms-product-card__price-special {
        font-size: 15px;
    }

    .ms-product-card__price-old {
        font-size: 12px;
    }

    .ms-product-card__add-to-cart {
        padding: 10px 8px;
        font-size: 12px;
    }

    .ms-product-card__actions {
        opacity: 1;
        background: linear-gradient(to top, rgba(0, 0, 0, 0.55), transparent);
    }
}

@media (max-width: 360px) {
    .ms-product-grid {
        gap: 8px 6px;
    }

    .ms-product-card__add-to-cart {
        font-size: 11px;
    }
}

/* --- Back to top --- */
.ms-back-to-top {
    position: fixed;
    right: 18px;
    bottom: 22px;
    z-index: 950;
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    background: var(--ms-accent);
    color: var(--ms-text);
    box-shadow: 0 8px 24px rgba(255, 77, 46, 0.35);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease,
        background-color 0.2s ease;
}

.ms-back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.ms-back-to-top:hover,
.ms-back-to-top:focus-visible {
    background: var(--ms-accent-hover);
    outline: 2px solid var(--ms-text);
    outline-offset: 2px;
}

/* --- Toast container polish --- */
.ms-toast-container {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 1200;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: min(360px, calc(100vw - 32px));
    pointer-events: none;
}

.ms-toast {
    pointer-events: auto;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 14px;
    border-radius: var(--ms-radius-md);
    background: var(--ms-surface);
    border: 1px solid var(--ms-surface-2);
    color: var(--ms-text);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
    font-size: 14px;
    line-height: 1.45;
    animation: ms-toast-in 0.28s ease;
}

.ms-toast--success {
    border-color: rgba(53, 199, 89, 0.45);
}

.ms-toast--error,
.ms-toast--danger {
    border-color: rgba(255, 59, 48, 0.45);
}

.ms-toast__close {
    background: none;
    border: none;
    color: var(--ms-text-muted);
    cursor: pointer;
    font-size: 18px;
    line-height: 1;
    padding: 0 0 0 4px;
}

@keyframes ms-toast-in {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Focus visibility --- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--ms-accent);
    outline-offset: 2px;
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .ms-spinner {
        animation: none;
        border-top-color: var(--ms-accent);
        opacity: 0.7;
    }
}

/* --- Typography scale & readability --- */
html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

.ms-module-title {
    font-size: clamp(20px, 3vw, 28px);
    font-weight: 700;
    letter-spacing: -0.01em;
    line-height: 1.25;
    margin: 0 0 18px;
}

.ms-section-title {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.3;
    margin: 0 0 14px;
}

.ms-breadcrumb,
.ms-breadcrumb__item {
    font-size: 13px;
    line-height: 1.5;
}

.price,
.ms-price,
.ms-price-main,
.ms-product-card__price-main,
.ms-product-card__price-special {
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.01em;
}

.ms-product-card__price-main,
.ms-product-card__price-special {
    font-weight: 700;
}

::selection {
    background: var(--ms-accent);
    color: var(--ms-text);
}

/* --- Content readability --- */
.ms-product-description,
#tab-description p,
.tab-pane p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--ms-text-secondary);
}

.ms-product-description h2,
.ms-product-description h3,
#tab-description h2,
#tab-description h3 {
    color: var(--ms-text);
    line-height: 1.3;
    margin: 1.2em 0 0.5em;
}