/**
 * Ultra Quantity Buttons - Flux Style
 * Нейтральная цветовая схема с качественными анимациями
 */

:root {
    /* Нейтральная палитра Flux */
    --ultra-neutral-50: #fafafa;
    --ultra-neutral-100: #f5f5f5;
    --ultra-neutral-200: #e5e5e5;
    --ultra-neutral-300: #d4d4d4;
    --ultra-neutral-400: #a3a3a3;
    --ultra-neutral-500: #737373;
    --ultra-neutral-600: #525252;
    --ultra-neutral-700: #404040;
    --ultra-neutral-800: #262626;
    --ultra-neutral-900: #171717;

    /* Акцентные цвета (приглушённые) */
    --ultra-accent: #6366f1;
    --ultra-accent-hover: #4f46e5;
    --ultra-accent-active: #4338ca;

    /* Тени */
    --ultra-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --ultra-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --ultra-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    /* Transitions */
    --ultra-transition-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ultra-transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   Контейнер кнопок
   ======================================== */

.ultra-quantity-buttons {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin: 8px 0;
    position: relative;
}

.ultra-quantity-buttons .ultra-add-to-cart {
    display: block;
}

/* Управление видимостью через класс has-qty */
.ultra-quantity-buttons:not(.has-qty) .ultra-qty-btn,
.ultra-quantity-buttons:not(.has-qty) .ultra-qty-display {
    display: none !important;
}

.ultra-quantity-buttons.has-qty .ultra-add-to-cart {
    display: none !important;
}

.ultra-quantity-buttons.has-qty .ultra-qty-btn,
.ultra-quantity-buttons.has-qty .ultra-qty-display {
    display: flex !important;
}

/* ========================================
   Кнопки +/-
   ======================================== */

.ultra-qty-btn {
    width: 38px;
    height: 38px;
    padding: 0;
    border: 1px solid var(--ultra-neutral-300);
    border-radius: 10px;
    background: linear-gradient(180deg, var(--ultra-neutral-50) 0%, var(--ultra-neutral-100) 100%);
    color: var(--ultra-neutral-700);
    font-weight: 600;
    font-size: 18px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: var(--ultra-shadow-sm);
    transition: all 0.4s var(--ultra-transition-smooth),
    transform 0.25s var(--ultra-transition-spring);
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.ultra-qty-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--ultra-neutral-400);
    opacity: 0;
    transform: translate(-50%, -50%);
    transition: width 0.4s, height 0.4s, opacity 0.3s;
}

.ultra-qty-btn:hover {
    background: var(--ultra-neutral-100);
    border-color: var(--ultra-neutral-400);
    box-shadow: var(--ultra-shadow-md);
}

.ultra-qty-btn:active {
    transform: translateY(0) scale(0.98);
    box-shadow: var(--ultra-shadow-sm);
}

.ultra-qty-btn:active::before {
    width: 100%;
    height: 100%;
    opacity: 0.2;
    transition: 0s;
}

.ultra-qty-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
    background: var(--ultra-neutral-100);
    border-color: var(--ultra-neutral-200);
    box-shadow: none;
}

.ultra-qty-btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* ========================================
   Дисплей количества
   ======================================== */

.ultra-qty-display {
    min-width: 44px;
    text-align: center;
    font-weight: 700;
    font-size: 16px;
    color: var(--ultra-neutral-800);
    padding: 8px 6px;
    user-select: none;
    background: var(--ultra-neutral-50);
    border-radius: 8px;
    transition: all 0.3s var(--ultra-transition-smooth);
}

/* ========================================
   Кнопка "В корзину"
   ======================================== */

.ultra-add-to-cart {
    background: linear-gradient(180deg, var(--ultra-accent) 0%, var(--ultra-accent-hover) 100%);
    border: 1px solid var(--ultra-accent);
    color: #fff;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: var(--ultra-shadow-md);
    transition: all 0.4s var(--ultra-transition-smooth),
    transform 0.25s var(--ultra-transition-spring);
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.ultra-add-to-cart::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    opacity: 0;
    transform: translate(-50%, -50%);
    transition: width 0.5s, height 0.5s, opacity 0.4s;
}

.ultra-add-to-cart:hover {
    background: linear-gradient(180deg, var(--ultra-accent-hover) 0%, var(--ultra-accent-active) 100%);
    border-color: var(--ultra-accent-hover);
    box-shadow: var(--ultra-shadow-lg);
}

.ultra-add-to-cart:active {
    transform: translateY(0) scale(0.98);
    box-shadow: var(--ultra-shadow-md);
}

.ultra-add-to-cart:active::before {
    width: 120%;
    height: 120%;
    opacity: 1;
    transition: 0s;
}

/* ========================================
   Loading состояние для всех кнопок
   ======================================== */

.ultra-add-to-cart.loading,
.ultra-qty-btn.loading {
    opacity: 0.7;
    cursor: wait;
    pointer-events: none;
    position: relative;
}

/* Spinner для кнопки "В корзину" */
.ultra-add-to-cart.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 12px;
    width: 14px;
    height: 14px;
    margin-top: -7px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: ultraSpin 0.6s linear infinite;
}

/* Spinner для кнопок +/- (центрированный) */
.ultra-qty-btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin-top: -8px;
    margin-left: -8px;
    border: 2px solid var(--ultra-neutral-400);
    border-radius: 50%;
    border-top-color: var(--ultra-neutral-700);
    animation: ultraSpin 0.6s linear infinite;
}

/* Скрываем текст кнопки +/- во время загрузки */
.ultra-qty-btn.loading {
    color: transparent;
}

/* ========================================
   Анимации
   ======================================== */

/* Pulse - для успешного действия */
.ultra-pulse {
    animation: ultraPulse 0.6s var(--ultra-transition-bounce);
}

@keyframes ultraPulse {
    0% {
        transform: scale(1);
    }
    40% {
        transform: scale(1.08);
    }
    60% {
        transform: scale(0.98);
    }
    100% {
        transform: scale(1);
    }
}

/* Shake - для ошибки */
.ultra-shake {
    animation: ultraShake 0.4s var(--ultra-transition-spring);
}

@keyframes ultraShake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 50%, 90% {
        transform: translateX(-4px);
    }
    30%, 70% {
        transform: translateX(4px);
    }
}

/* Spinner для loading */
@keyframes ultraSpin {
    to {
        transform: rotate(360deg);
    }
}

/* Fade-in для появления элементов */
.ultra-fade-in {
    animation: ultraFadeIn 0.3s var(--ultra-transition-smooth);
}

@keyframes ultraFadeIn {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Focus стили для доступности */
.ultra-qty-btn:focus,
.ultra-add-to-cart:focus {
    outline: 2px solid var(--ultra-accent);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

/* Улучшенные цвета для лучшего контраста */
.ultra-qty-display {
    color: var(--ultra-neutral-900);
    background: var(--ultra-neutral-50);
}

/* Loading состояние для контейнера */
.ultra-quantity-buttons.ultra-loading .ultra-qty-btn,
.ultra-quantity-buttons.ultra-loading .ultra-qty-display {
    pointer-events: none;
    opacity: 0.6;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 768px) {
    .ultra-quantity-buttons {
        gap: 4px;
    }

    .ultra-qty-btn {
        width: 34px;
        height: 34px;
        font-size: 16px;
        border-radius: 8px;
    }

    .ultra-qty-display {
        min-width: 38px;
        font-size: 14px;
        padding: 6px 4px;
    }

    .ultra-add-to-cart {
        padding: 8px 16px;
        font-size: 13px;
        border-radius: 8px;
    }

    /* Убираем hover-эффекты на тач-устройствах */
    .ultra-qty-btn:hover,
    .ultra-add-to-cart:hover {
        transform: none;
    }
}

@media (max-width: 480px) {
    .ultra-qty-btn {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }

    .ultra-qty-display {
        min-width: 34px;
        font-size: 13px;
    }

    .ultra-add-to-cart {
        padding: 7px 14px;
        font-size: 12px;
    }
}

/* ========================================
   Темная тема (опционально)
   ======================================== */

@media (prefers-color-scheme: dark) {
    :root {
        --ultra-neutral-50: #262626;
        --ultra-neutral-100: #404040;
        --ultra-neutral-200: #525252;
        --ultra-neutral-300: #737373;
        --ultra-neutral-400: #a3a3a3;
        --ultra-neutral-500: #d4d4d4;
        --ultra-neutral-600: #e5e5e5;
        --ultra-neutral-700: #f5f5f5;
        --ultra-neutral-800: #fafafa;
        --ultra-neutral-900: #ffffff;

        --ultra-accent: #818cf8;
        --ultra-accent-hover: #6366f1;
        --ultra-accent-active: #4f46e5;
    }

    .ultra-qty-btn {
        box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.3);
    }

    .ultra-add-to-cart {
        box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.3);
    }
}