/* Базовые стили кнопок - Оптимизированные 2026 */
button,
input[type="submit"],
input[type="button"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-family-heading);
    cursor: pointer;
    transition: transform var(--transition-base), opacity var(--transition-base), box-shadow var(--transition-base);
    line-height: 1;
    min-height: 44px;
    min-width: 44px;
    box-sizing: border-box;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(139, 92, 246, 0.2);
    white-space: nowrap;
    will-change: transform;
    contain: layout style paint;
    isolation: isolate;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-feature-settings: 'kern' 1;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

/* Оптимизация для мобильных устройств */
@media (max-width: 768px) {
    button,
    input[type="submit"],
    input[type="button"] {
        will-change: auto;
        contain: layout style;
    }
}

/* Анимации для градиентных кнопок */
@keyframes buttonShimmer {
    0% { left: -100%; }
    50%, 100% { left: 100%; }
}

@keyframes buttonPulse {
    0%, 100% {
        box-shadow: 
            0 8px 30px rgba(139, 92, 246, 0.4),
            0 4px 15px rgba(168, 85, 247, 0.3),
            inset 0 1px 0 rgba(255, 255, 255, 0.2);
    }
    50% {
        box-shadow: 
            0 8px 30px rgba(139, 92, 246, 0.6),
            0 4px 15px rgba(168, 85, 247, 0.5),
            inset 0 1px 0 rgba(255, 255, 255, 0.4),
            0 0 30px rgba(139, 92, 246, 0.5);
    }
}

@keyframes buttonGreenPulse {
    0%, 100% {
        box-shadow: 
            0 8px 32px rgba(5, 150, 105, 0.35),
            0 4px 16px rgba(4, 120, 87, 0.25),
            0 2px 8px rgba(16, 185, 129, 0.2),
            inset 0 1px 0 rgba(255, 255, 255, 0.15),
            0 0 20px rgba(16, 185, 129, 0.15);
    }
    50% {
        box-shadow: 
            0 12px 40px rgba(5, 150, 105, 0.5),
            0 6px 20px rgba(4, 120, 87, 0.4),
            0 3px 12px rgba(16, 185, 129, 0.3),
            inset 0 1px 0 rgba(255, 255, 255, 0.25),
            0 0 40px rgba(16, 185, 129, 0.4),
            0 0 60px rgba(5, 150, 105, 0.2);
    }
}

/* Кнопки отправки и закрытия */
.btn-submit-review,
.btn-close-success {
    gap: 10px;
    background: linear-gradient(135deg, 
        #7C3AED 0%, 
        #8B5CF6 25%,
        #A855F7 50%,
        #C084FC 75%,
        #8B5CF6 100%);
    background-size: 200% 200%;
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 16px;
    font-weight: 800;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), background-position 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 
        0 8px 30px rgba(139, 92, 246, 0.4),
        0 4px 15px rgba(168, 85, 247, 0.3),
        inset 0 0 0 1px rgba(255, 255, 255, 0.1),
        inset 0 1px 2px rgba(255, 255, 255, 0.2);
    animation: buttonPulse 3s ease-in-out infinite;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    letter-spacing: 0.5px;
}

.btn-submit-review::before,
.btn-close-success::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.4), 
        transparent);
    transition: left 0.5s ease;
    z-index: 1;
    will-change: left;
    animation: buttonShimmer 2.5s ease-in-out infinite;
}

.btn-submit-review {
    padding: 16px 32px;
    margin-top: 8px;
    min-height: 52px;
}

.btn-close-success {
    padding: 14px 40px;
    min-height: 50px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-submit-review:hover,
.btn-close-success:hover {
    transform: translateY(-3px) scale(1.02);
    background-position: 100% 50%;
    animation: none;
    box-shadow: 
        0 12px 40px rgba(139, 92, 246, 0.5),
        0 6px 20px rgba(168, 85, 247, 0.4),
        inset 0 0 0 1px rgba(255, 255, 255, 0.2),
        inset 0 2px 6px rgba(255, 255, 255, 0.3);
}

.btn-submit-review:hover::before,
.btn-close-success:hover::before {
    left: 100%;
    animation: none;
}

.btn-submit-review:active,
.btn-close-success:active {
    transform: translateY(-1px) scale(1);
    box-shadow: 
        0 6px 25px rgba(139, 92, 246, 0.4),
        0 3px 15px rgba(168, 85, 247, 0.3),
        inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.btn-submit-review *,
.btn-close-success * {
    position: relative;
    z-index: 2;
}

/* Кнопка успеха */
.btn-success {
    background: linear-gradient(135deg, var(--color-success) 0%, #059669 100%);
    color: white;
}

/* Анимации премиум кнопки */
@keyframes paymentShimmer {
    0% { left: -100%; }
    50%, 100% { left: 100%; }
}

@keyframes paymentPulse {
    0%, 100% {
        box-shadow: 
            0 0 0 0 rgba(212, 175, 55, 0.7),
            0 0 0 0 rgba(139, 92, 246, 0.5),
            0 12px 40px rgba(212, 175, 55, 0.4),
            0 6px 20px rgba(139, 92, 246, 0.3);
    }
    50% {
        box-shadow: 
            0 0 0 10px rgba(212, 175, 55, 0),
            0 0 0 20px rgba(139, 92, 246, 0),
            0 12px 40px rgba(212, 175, 55, 0.6),
            0 6px 20px rgba(139, 92, 246, 0.5);
    }
}

@keyframes paymentGlow {
    0%, 100% {
        opacity: 0.6;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
}

/* Премиум кнопка оплаты */
.btn-payment-premium {
    width: 100%;
    max-width: 100%;
    padding: 24px 40px;
    background: linear-gradient(135deg, 
        #D4AF37 0%, 
        #C9A961 25%,
        #8B5CF6 50%,
        #A855F7 75%,
        #C084FC 100%);
    background-size: 200% 200%;
    border: none;
    border-radius: 18px;
    color: white;
    font-size: 20px;
    font-weight: 800;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), background-position 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    gap: 14px;
    letter-spacing: 1px;
    text-transform: uppercase;
    position: relative;
    overflow: hidden;
    min-height: 72px;
    contain: layout style;
    animation: paymentPulse 3s ease-in-out infinite;
    box-shadow: 
        0 12px 40px rgba(212, 175, 55, 0.4),
        0 6px 20px rgba(139, 92, 246, 0.3),
        inset 0 0 0 1px rgba(255, 255, 255, 0.1),
        inset 0 2px 4px rgba(255, 255, 255, 0.3);
}

.btn-payment-premium::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.5), 
        transparent);
    z-index: 1;
    will-change: left;
    animation: paymentShimmer 2.5s ease-in-out infinite;
}

.btn-payment-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, 
        rgba(212, 175, 55, 0.4) 0%, 
        rgba(139, 92, 246, 0.3) 50%, 
        transparent 70%);
    transform: translate(-50%, -50%);
    z-index: 0;
    pointer-events: none;
    will-change: opacity, transform;
    animation: paymentGlow 2s ease-in-out infinite;
}

.btn-payment-icon,
.btn-payment-arrow {
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
    transition: transform 0.3s ease;
}

.btn-payment-text {
    position: relative;
    z-index: 2;
    white-space: nowrap;
    font-family: var(--font-family-heading);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    letter-spacing: 1.2px;
    font-weight: 800;
    will-change: transform;
    font-feature-settings: 'kern' 1, 'liga' 1;
    text-rendering: optimizeLegibility;
}

@media (max-width: 768px) {
    .btn-payment-text {
        white-space: normal;
        word-break: keep-all;
        line-height: 1.2;
    }
}

.btn-payment-premium:hover {
    transform: translateY(-4px) scale(1.02);
    background-position: 100% 0%;
    animation: none;
    box-shadow: 
        0 16px 50px rgba(212, 175, 55, 0.5),
        0 8px 30px rgba(139, 92, 246, 0.4),
        inset 0 0 0 1px rgba(255, 255, 255, 0.2),
        inset 0 2px 6px rgba(255, 255, 255, 0.4);
}

.btn-payment-premium:hover::before {
    left: 100%;
    animation: none;
}

.btn-payment-premium:hover .btn-payment-icon {
    transform: scale(1.1) rotate(5deg);
}

.btn-payment-premium:hover .btn-payment-arrow {
    transform: translateX(4px);
}

.btn-payment-premium:active {
    transform: translateY(-2px) scale(1);
    box-shadow: 
        0 8px 25px rgba(212, 175, 55, 0.4),
        0 4px 15px rgba(139, 92, 246, 0.3),
        inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Кнопка разблокировки в превью */
.unlock-cta .btn-unlock,
.compact-cta .btn-unlock,
.accordion .accordion-preview .unlock-cta .btn-unlock,
.accordion .accordion-preview .compact-cta .btn-unlock {
    width: auto;
    max-width: calc(100% - 32px);
    margin: 0 auto;
    padding: 18px 24px;
    background: linear-gradient(135deg, 
        #065f46 0%, 
        #047857 15%,
        #059669 30%,
        #10b981 45%,
        #059669 60%,
        #047857 75%,
        #065f46 90%,
        #064e3b 100%);
    background-size: 400% 400%;
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 16px;
    color: #ffffff;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: none;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), background-position 0.4s ease, box-shadow 0.3s ease;
    backface-visibility: hidden;
    box-shadow: 
        0 8px 32px rgba(5, 150, 105, 0.35),
        0 4px 16px rgba(4, 120, 87, 0.25),
        0 2px 8px rgba(16, 185, 129, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.15),
        0 0 20px rgba(16, 185, 129, 0.15);
    overflow: hidden;
    pointer-events: auto;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    gap: 10px;
    min-height: 60px;
    position: relative;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: buttonGreenPulse 3s ease-in-out infinite;
}

.unlock-cta .btn-unlock::before,
.compact-cta .btn-unlock::before,
.accordion .accordion-preview .unlock-cta .btn-unlock::before,
.accordion .accordion-preview .compact-cta .btn-unlock::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.2) 50%, 
        transparent 100%);
    transition: left 0.5s ease;
    z-index: 1;
    will-change: left;
    animation: buttonShimmer 3s ease-in-out infinite;
}

.unlock-cta .btn-unlock:hover::before,
.compact-cta .btn-unlock:hover::before,
.accordion .accordion-preview .unlock-cta .btn-unlock:hover::before,
.accordion .accordion-preview .compact-cta .btn-unlock:hover::before {
    left: 100%;
}

.unlock-cta .btn-unlock:hover,
.compact-cta .btn-unlock:hover,
.accordion .accordion-preview .unlock-cta .btn-unlock:hover,
.accordion .accordion-preview .compact-cta .btn-unlock:hover {
    transform: translateY(-2px) scale(1.02);
    background-position: 100% 50%;
    box-shadow: 
        0 12px 40px rgba(5, 150, 105, 0.45),
        0 6px 20px rgba(4, 120, 87, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.unlock-cta .btn-unlock:hover .btn-unlock-arrow,
.compact-cta .btn-unlock:hover .btn-unlock-arrow,
.accordion .accordion-preview .unlock-cta .btn-unlock:hover .btn-unlock-arrow,
.accordion .accordion-preview .compact-cta .btn-unlock:hover .btn-unlock-arrow {
    transform: translateX(3px);
}

.unlock-cta .btn-unlock:active,
.compact-cta .btn-unlock:active,
.accordion .accordion-preview .unlock-cta .btn-unlock:active,
.accordion .accordion-preview .compact-cta .btn-unlock:active {
    transform: translateY(0) scale(1);
    box-shadow: 
        0 6px 25px rgba(5, 150, 105, 0.35),
        0 3px 12px rgba(4, 120, 87, 0.25),
        inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.btn-unlock-icon,
.btn-unlock-arrow {
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
    transition: transform 0.3s ease;
}

.btn-unlock-icon {
    width: 20px;
    height: 20px;
}

.btn-unlock-icon svg,
.btn-unlock-arrow svg {
    width: 100%;
    height: 100%;
}

.btn-unlock-arrow {
    width: 18px;
    height: 18px;
}

.btn-unlock-text {
    position: relative;
    z-index: 2;
    flex-shrink: 1;
    min-width: 0;
    overflow-wrap: break-word;
    word-break: break-word;
    hyphens: auto;
    text-align: center;
    line-height: 1.3;
    font-feature-settings: 'kern' 1;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.unlock-cta .btn-unlock span,
.compact-cta .btn-unlock span,
.accordion .accordion-preview .unlock-cta .btn-unlock span,
.accordion .accordion-preview .compact-cta .btn-unlock span {
    position: relative;
    z-index: 2;
}

/* ПК (≥1025px) */
@media (min-width: 1025px) {
    .unlock-cta .btn-unlock,
    .compact-cta .btn-unlock,
    .accordion .accordion-preview .unlock-cta .btn-unlock,
    .accordion .accordion-preview .compact-cta .btn-unlock {
        max-width: calc(100% - 20px);
        padding: 20px 80px;
        font-size: 14px;
        gap: 12px;
        min-height: 64px;
    }
}

/* Мобильные (≤768px) */
@media (max-width: 768px) {
    .btn-submit-review {
        padding: 12px 24px;
        font-size: 14px;
    }
    
    .btn-close-success {
        padding: 14px 28px;
        font-size: 15px;
    }
    
    .btn-payment-premium {
        padding: 20px 32px;
        font-size: 17px;
        min-height: 64px;
        gap: 12px;
    }
    
    .btn-payment-icon {
        width: 24px;
        height: 24px;
    }
    
    .btn-payment-arrow {
        width: 18px;
        height: 18px;
    }
    
    .unlock-cta .btn-unlock,
    .compact-cta .btn-unlock,
    .accordion .accordion-preview .unlock-cta .btn-unlock,
    .accordion .accordion-preview .compact-cta .btn-unlock {
        width: auto;
        max-width: calc(100% - 24px);
        padding: 16px 20px;
        font-size: 13px;
        gap: 8px;
        min-height: 56px;
    }
}

/* Маленькие мобильные (≤480px) */
@media (max-width: 480px) {
    .btn-submit-review {
        padding: 10px 20px;
        font-size: 13px;
        margin-top: 6px;
        width: 100%;
    }
    
    .btn-close-success {
        padding: 12px 24px;
        font-size: 14px;
        width: 100%;
    }
    
    .btn-payment-premium {
        padding: 18px 24px;
        font-size: 15px;
        min-height: 60px;
        gap: 10px;
        letter-spacing: 0.8px;
    }
    
    .btn-payment-icon {
        width: 22px;
        height: 22px;
    }
    
    .btn-payment-arrow {
        width: 16px;
        height: 16px;
    }
    
    .btn-payment-text {
        font-size: 15px;
        letter-spacing: 0.8px;
    }
    
    .unlock-cta .btn-unlock,
    .compact-cta .btn-unlock,
    .accordion .accordion-preview .unlock-cta .btn-unlock,
    .accordion .accordion-preview .compact-cta .btn-unlock {
        width: auto;
        max-width: calc(100% - 16px);
        padding: 14px 16px;
        font-size: 11px;
        gap: 6px;
        min-height: 52px;
    }
    
    .btn-unlock-text {
        font-size: 11px;
        letter-spacing: 0.3px;
    }
    
    .btn-unlock-icon {
        width: 16px;
        height: 16px;
    }
    
    .btn-unlock-arrow {
        width: 14px;
        height: 14px;
    }
}

/* Очень маленькие (≤360px) */
@media (max-width: 360px) {
    .btn-payment-premium {
        padding: 16px 20px;
        font-size: 13px;
        min-height: 56px;
        gap: 8px;
        letter-spacing: 0.5px;
    }
    
    .btn-payment-icon {
        width: 20px;
        height: 20px;
    }
    
    .btn-payment-arrow {
        width: 14px;
        height: 14px;
    }
    
    .btn-payment-text {
        font-size: 13px;
        letter-spacing: 0.5px;
    }
    
    .unlock-cta .btn-unlock,
    .compact-cta .btn-unlock,
    .accordion .accordion-preview .unlock-cta .btn-unlock,
    .accordion .accordion-preview .compact-cta .btn-unlock {
        max-width: calc(100% - 12px);
        padding: 12px 12px;
        font-size: 10px;
        gap: 5px;
        min-height: 48px;
    }
    
    .btn-unlock-text {
        font-size: 10px;
        letter-spacing: 0.2px;
    }
    
    .btn-unlock-icon {
        width: 14px;
        height: 14px;
    }
    
    .btn-unlock-arrow {
        width: 12px;
        height: 12px;
    }
}