/**
 * Componente: Botões
 * 
 * ESPECIFICIDADE: Nível 2 - Classes simples (.btn)
 * NAMESPACING: Prefixo .btn-* para evitar conflitos
 * PRIORIDADE: Carregamento #3
 */

/* ===== BOTÃO BASE ===== */
.btn {
    /* Layout */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    
    /* Espaçamento */
    padding: var(--spacing-md) var(--spacing-lg);
    
    /* Tipografia */
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    
    /* Visual */
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    
    /* Estados base */
    outline: none;

    gap: 8px;
}

/* ===== FOCO ACESSÍVEL ===== */
.btn:focus {
    box-shadow: 0 0 0 3px rgba(139, 69, 19, 0.3); /* primary-color com alpha */
}

/* ===== VARIANTES DE COR ===== */
.btn--primary {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn--primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn--secondary {
    background-color: var(--secondary-color);
    color: var(--white);
}

.btn--secondary:hover {
    background-color: #e68900; /* secondary-color darkened */
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn--outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn--outline:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

/* ===== TAMANHOS ===== */
.btn--sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

.btn--lg {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

/* ===== ESTADOS ===== */
.btn:disabled,
.btn--disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Evitar hover em botões desabilitados */
.btn:disabled:hover,
.btn--disabled:hover {
    transform: none;
    box-shadow: none;
}

/* ===== BOTÕES DE VÍDEO ===== */
.play-button {
    /* Layout */
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    
    /* Visual */
    background: rgba(255, 0, 0, 0.9); /* YouTube red */
    border-radius: 50%;
    color: var(--white);
    font-size: 24px;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

.play-button:hover {
    background: rgb(255, 0, 0);
    transform: scale(1.1);
}

.play-button--small {
    width: 45px;
    height: 45px;
    font-size: 18px;
}

.play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: opacity var(--transition-normal);
    cursor: pointer;
}

/* Mostrar overlay no hover do card */
.video-card:hover .play-overlay {
    opacity: 1;
}

/* ===== VARIANTE ESPECÍFICA DO PROJETO ===== */
.btn--cvale {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.btn--cvale::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-normal);
}

.btn--cvale:hover::before {
    left: 100%;
}