:root {
    --color-primary: #3a8edb;
    --color-primary-hover: #50bcd9;
    --color-accent: #47e0b4;
    --color-text: #153F53;
    --color-primary-rgb: 58, 142, 219;
    --color-accent-rgb: 71, 224, 180;
    --color-focus-ring: rgba(58, 142, 219, 0.4);

    --duration-normal: 250ms;
    --duration-slow: 400ms;
    --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-text: #6cd0d4;
        --color-primary: #6cd0d4;
        --color-primary-hover: #47e0b4;
    }
}

.feedback-info {
    text-align: center;
    margin-bottom: 0.8rem;
    padding: 0.5rem 1rem;
    display: flex;
    justify-content: center;
}

.feedback-info-text {
    font-size: 0.85em;
    color: #4d809c;
    opacity: 0.75;
    line-height: 1.4;
    margin: 0;
    font-weight: 400;
    letter-spacing: 0.01em;
}

.feedback-button-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.feedback-button {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    background: transparent;
    border: 2px solid var(--color-primary);
    border-radius: 50px;
    color: var(--color-primary);
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-standard);
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(var(--color-primary-rgb), 0.15);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

.feedback-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-standard);
    z-index: -1;
}

.feedback-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(var(--color-primary-rgb), 0.25);
    border-color: var(--color-primary-hover);
    color: var(--color-primary-hover);
}

.feedback-button:hover::before {
    opacity: 0.08;
}

.feedback-button:active {
    transform: translateY(0);
    box-shadow: 0 4px 12px rgba(var(--color-primary-rgb), 0.15);
}

.feedback-button:focus-visible {
    outline: none;
    box-shadow: 0 0 0 4px var(--color-focus-ring);
}

.envelope-icon {
    width: 24px;
    height: 24px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.envelope-svg {
    width: 24px;
    height: 24px;
    transition: transform var(--duration-slow) var(--ease-bounce);
}

.feedback-button:hover .envelope-svg {
    transform: rotate(-15deg) translateY(-2px);
}

.button-text {
    font-weight: 500;
    letter-spacing: 0.01em;
}

@media (max-width: 768px) {
    .feedback-info-text {
        font-size: 0.80em;
        padding: 0 0.5rem;
    }

    .feedback-button {
        width: 52px;
        height: 52px;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        gap: 0;
    }

    .envelope-icon {
        width: 20px;
        height: 20px;
        margin: 0;
        padding: 0;
    }

    .envelope-svg {
        width: 20px;
        height: 20px;
    }

    .button-text {
        display: none;
    }
}