/**
 * Estilos de Botões
 * Sistema de botões para o site Alt tab Corp - Design moderno e elegante
 */

/* Botão Base */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 2px solid transparent;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-normal);
    white-space: nowrap;
    min-width: 120px;
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

/* Variantes de Botões */
.btn-primary {
    background-color: var(--secondary);
    color: var(--light);
    border-color: var(--secondary);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
    color: var(--light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background-color: var(--primary);
    color: var(--light);
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover, .btn-secondary:focus {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: var(--light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.btn-secondary:active {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-accent {
    background-color: var(--accent);
    color: var(--light);
    border-color: var(--accent);
    box-shadow: var(--shadow-sm);
}

.btn-accent:hover, .btn-accent:focus {
    background-color: var(--accent-dark);
    border-color: var(--accent-dark);
    color: var(--light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.btn-accent:active {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

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

.btn-outline:hover, .btn-outline:focus {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--secondary-dark);
    border-color: var(--secondary-dark);
    transform: translateY(-3px);
}

.btn-outline:active {
    transform: translateY(-1px);
}

.btn-outline-light {
    background-color: transparent;
    color: var(--light);
    border-color: var(--light);
}

.btn-outline-light:hover, .btn-outline-light:focus {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--light);
    border-color: var(--light);
    transform: translateY(-3px);
}

.btn-outline-light:active {
    transform: translateY(-1px);
}

/* Botões de Texto */
.btn-text {
    background-color: transparent;
    color: var(--secondary);
    border: none;
    padding: 0.5rem 1rem;
    text-decoration: none;
    position: relative;
    transition: all var(--transition-normal);
}

.btn-text::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--secondary);
    transition: width var(--transition-normal);
}

.btn-text:hover::after, .btn-text:focus::after {
    width: 100%;
}

.btn-text:hover, .btn-text:focus {
    color: var(--secondary-dark);
}

/* Tamanhos de Botões */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-xs);
    min-width: 100px;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: var(--font-size-md);
    min-width: 160px;
}

/* Botão com Ícone */
.btn i {
    margin-left: 0.5rem;
    font-size: 1rem;
    transition: transform var(--transition-normal);
}

.btn:hover i {
    transform: translateX(3px);
}

.btn-icon-left i {
    margin-right: 0.5rem;
    margin-left: 0;
}

.btn-icon-left:hover i {
    transform: translateX(-3px);
}

/* Botão Circular */
.btn-circle {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: unset;
}

.btn-circle i {
    margin: 0;
    font-size: 1.25rem;
}

.btn-circle:hover i {
    transform: none;
}

.btn-circle.btn-sm {
    width: 36px;
    height: 36px;
}

.btn-circle.btn-lg {
    width: 60px;
    height: 60px;
}

/* Botão com Efeito Ripple */
.btn-ripple {
    position: relative;
    overflow: hidden;
}

.btn-ripple .ripple {
    position: absolute;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.4);
    width: 100px;
    height: 100px;
    margin-top: -50px;
    margin-left: -50px;
    animation: ripple 1s;
    opacity: 0;
}

@keyframes ripple {
    from {
        opacity: 1;
        transform: scale(0);
    }
    to {
        opacity: 0;
        transform: scale(3);
    }
}

/* Botão Desabilitado */
.btn:disabled, .btn.disabled {
    opacity: 0.65;
    pointer-events: none;
    cursor: not-allowed;
}

/* Botão de Voltar ao Topo */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--secondary);
    color: var(--light);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-fixed);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--secondary-dark);
    transform: translateY(-5px);
}

.back-to-top i {
    font-size: 1.25rem;
}

/* Botão de Loading */
.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--light);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Responsividade */
@media (max-width: 768px) {
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: var(--font-size-xs);
    }
    
    .btn-lg {
        padding: 0.875rem 1.75rem;
        font-size: var(--font-size-sm);
    }
    
    .btn-sm {
        padding: 0.5rem 0.875rem;
        font-size: var(--font-size-xs);
    }
}

:root {
    --btn-transition: all 0.3s ease;
    --btn-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

.btn-glow {
    position: relative;
    overflow: hidden;
}

.btn-glow:hover {
    transform: translateY(-2px);
    box-shadow: var(--btn-shadow);
}

.btn-hover-slide {
    position: relative;
    overflow: hidden;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    background: transparent;
}

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

.btn-hover-slide:hover {
    color: white;
}

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

@keyframes pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 5px 15px rgba(37, 99, 235, 0.4);
    }
    50% {
        transform: scale(1.1);
        box-shadow: 0 8px 25px rgba(37, 99, 235, 0.6);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 5px 15px rgba(37, 99, 235, 0.4);
    }
}