/**
 * Back to Top Widget - Styles
 */

/* Base button styles */
.btt-button {
    position: fixed;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-sizing: border-box;
    text-decoration: none;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

/* Visible state */
.btt-button.is-visible {
    opacity: 1;
    visibility: visible;
}

/* Position variants */
.btt-button.position-bottom-right {
    right: 30px;
    bottom: 30px;
}

.btt-button.position-bottom-left {
    left: 30px;
    bottom: 30px;
}

.btt-button.position-bottom-center {
    left: 50%;
    transform: translateX(-50%);
    bottom: 30px;
}

.btt-button.position-bottom-center.is-visible {
    transform: translateX(-50%);
}

/* Icon styles */
.btt-button .btt-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.btt-button .btt-icon i {
    line-height: inherit;
}

.btt-button .btt-icon svg {
    display: block;
}

/* Text styles */
.btt-button .btt-text {
    line-height: 1.2;
    white-space: nowrap;
}

/* Animation variants */
.btt-button.animation-fade {
    opacity: 0;
}

.btt-button.animation-fade.is-visible {
    opacity: 1;
}

.btt-button.animation-slide-up {
    opacity: 0;
    transform: translateY(20px);
}

.btt-button.animation-slide-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.btt-button.animation-slide-up.position-bottom-center {
    transform: translateX(-50%) translateY(20px);
}

.btt-button.animation-slide-up.position-bottom-center.is-visible {
    transform: translateX(-50%) translateY(0);
}

.btt-button.animation-scale {
    opacity: 0;
    transform: scale(0.5);
}

.btt-button.animation-scale.is-visible {
    opacity: 1;
    transform: scale(1);
}

.btt-button.animation-scale.position-bottom-center {
    transform: translateX(-50%) scale(0.5);
}

.btt-button.animation-scale.position-bottom-center.is-visible {
    transform: translateX(-50%) scale(1);
}

.btt-button.animation-bounce {
    opacity: 0;
    transform: translateY(20px);
}

.btt-button.animation-bounce.is-visible {
    opacity: 1;
    transform: translateY(0);
    animation: btt-bounce 0.5s ease;
}

.btt-button.animation-bounce.position-bottom-center {
    transform: translateX(-50%) translateY(20px);
}

.btt-button.animation-bounce.position-bottom-center.is-visible {
    transform: translateX(-50%) translateY(0);
}

@keyframes btt-bounce {
    0% {
        transform: translateY(20px);
    }
    50% {
        transform: translateY(-10px);
    }
    70% {
        transform: translateY(5px);
    }
    100% {
        transform: translateY(0);
    }
}

/* Focus state for accessibility */
.btt-button:focus {
    outline: 2px solid currentColor;
    outline-offset: 2px;
}

.btt-button:focus:not(:focus-visible) {
    outline: none;
}

.btt-button:focus-visible {
    outline: 2px solid currentColor;
    outline-offset: 2px;
}

/* Hide on mobile */
@media (max-width: 767px) {
    .btt-button.hide-on-mobile {
        display: none !important;
    }
}

/* Hover effects - Pulse */
.btt-button:hover {
    transform: translateY(-2px);
}

.btt-button.position-bottom-center:hover {
    transform: translateX(-50%) translateY(-2px);
}

/* Print styles */
@media print {
    .btt-button {
        display: none !important;
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .btt-button {
        transition: opacity 0.1s ease;
    }
    
    .btt-button.animation-bounce.is-visible {
        animation: none;
    }
}

/* High contrast mode support */
@media (forced-colors: active) {
    .btt-button {
        border: 2px solid currentColor;
    }
}