/* ==========================================================================
   SUNYA - Pulsanti con animazioni
   ========================================================================== */

/* --------------------------------------------------------------------------
   Base button
   -------------------------------------------------------------------------- */

.sunya-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sunya-spacing-sm);
    padding: 0.75em 1.75em;
    font-family: var(--sunya-font-body);
    font-size: var(--sunya-font-size-base);
    font-weight: var(--sunya-font-weight-medium);
    line-height: 1.4;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--sunya-radius-md);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    z-index: 1;
    transition: color var(--sunya-transition-base),
                background-color var(--sunya-transition-base),
                border-color var(--sunya-transition-base),
                box-shadow var(--sunya-transition-base),
                transform var(--sunya-transition-fast);
}

.sunya-btn:focus-visible {
    outline: 2px solid var(--sunya-color-accent);
    outline-offset: 2px;
}


/* --------------------------------------------------------------------------
   Varianti
   -------------------------------------------------------------------------- */

/* Primary */
.sunya-btn--primary {
    background-color: var(--sunya-color-accent);
    color: #ffffff;
    border-color: var(--sunya-color-accent);
}

.sunya-btn--primary:hover {
    background-color: var(--sunya-color-accent-hover);
    border-color: var(--sunya-color-accent-hover);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(233, 69, 96, 0.35);
}

.sunya-btn--primary:active {
    transform: translateY(0);
    box-shadow: none;
}

/* Secondary */
.sunya-btn--secondary {
    background-color: var(--sunya-color-primary);
    color: #ffffff;
    border-color: var(--sunya-color-primary);
}

.sunya-btn--secondary:hover {
    background-color: var(--sunya-color-secondary);
    border-color: var(--sunya-color-secondary);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: var(--sunya-shadow-lg);
}

.sunya-btn--secondary:active {
    transform: translateY(0);
}

/* Outline */
.sunya-btn--outline {
    background-color: transparent;
    color: var(--sunya-color-accent);
    border-color: var(--sunya-color-accent);
}

.sunya-btn--outline:hover {
    background-color: var(--sunya-color-accent);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(233, 69, 96, 0.25);
}

.sunya-btn--outline:active {
    transform: translateY(0);
}

/* Ghost (solo testo) */
.sunya-btn--ghost {
    background-color: transparent;
    color: var(--sunya-color-accent);
    border-color: transparent;
    padding-left: 0;
    padding-right: 0;
}

.sunya-btn--ghost:hover {
    color: var(--sunya-color-accent-hover);
}

/* White (per sfondi scuri) */
.sunya-btn--white {
    background-color: #ffffff;
    color: var(--sunya-color-primary);
    border-color: #ffffff;
}

.sunya-btn--white:hover {
    background-color: transparent;
    color: #ffffff;
    transform: translateY(-2px);
}


/* --------------------------------------------------------------------------
   Dimensioni
   -------------------------------------------------------------------------- */

.sunya-btn--sm {
    padding: 0.5em 1.25em;
    font-size: var(--sunya-font-size-sm);
}

.sunya-btn--lg {
    padding: 1em 2.25em;
    font-size: var(--sunya-font-size-lg);
}

.sunya-btn--full {
    width: 100%;
}


/* --------------------------------------------------------------------------
   Animazione: effetto ripple
   -------------------------------------------------------------------------- */

.sunya-btn--ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease, opacity 0.6s ease;
    z-index: -1;
    opacity: 0;
}

.sunya-btn--ripple:active::after {
    width: 300px;
    height: 300px;
    opacity: 1;
    transition: 0s;
}


/* --------------------------------------------------------------------------
   Animazione: effetto slide-fill
   -------------------------------------------------------------------------- */

.sunya-btn--slide {
    overflow: hidden;
}

.sunya-btn--slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background-color: var(--sunya-color-accent-hover);
    transition: left var(--sunya-transition-base);
    z-index: -1;
}

.sunya-btn--slide:hover::before {
    left: 0;
}


/* --------------------------------------------------------------------------
   Animazione: icona freccia
   -------------------------------------------------------------------------- */

.sunya-btn__arrow {
    display: inline-block;
    transition: transform var(--sunya-transition-base);
}

.sunya-btn:hover .sunya-btn__arrow {
    transform: translateX(4px);
}


/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
    .sunya-btn {
        transition: none;
    }

    .sunya-btn:hover {
        transform: none;
        box-shadow: none;
    }

    .sunya-btn--ripple::after,
    .sunya-btn--slide::before {
        display: none;
    }
}