/* =========================================================================
   BUTTONS COMPONENT - QTR
   Archivo: assets/css/components/buttons.css
   Descripción: Sistema de botones reutilizables
========================================================================= */

/* ===== BASE BUTTON ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-5);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-size-base);
    line-height: 1;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn i {
    font-size: 0.9em;
}

/* ===== TAMAÑOS ===== */
.btn-xs {
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
    gap: var(--spacing-1);
}

.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
    gap: var(--spacing-2);
}

.btn-base {
    padding: var(--spacing-3) var(--spacing-5);
    font-size: var(--font-size-base);
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-6);
    font-size: var(--font-size-lg);
    gap: var(--spacing-3);
}

.btn-xl {
    padding: var(--spacing-5) var(--spacing-8);
    font-size: var(--font-size-xl);
    gap: var(--spacing-3);
}

/* ===== VARIANTES DE COLOR ===== */

/* Primary */
.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-secondary:hover:not(:disabled) {
    background: #0e7490;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Accent */
.btn-accent {
    background: var(--color-accent);
    color: white;
}

.btn-accent:hover:not(:disabled) {
    background: #b91c1c;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Success */
.btn-success {
    background: var(--color-success);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background: #047857;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Warning */
.btn-warning {
    background: var(--color-warning);
    color: white;
}

.btn-warning:hover:not(:disabled) {
    background: #b45309;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ===== VARIANTES OUTLINE ===== */
.btn-outline {
    background: transparent;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
    background: var(--color-primary);
    color: white;
}

.btn-outline-secondary {
    background: transparent;
    border: 1px solid var(--color-secondary);
    color: var(--color-secondary);
}

.btn-outline-secondary:hover:not(:disabled) {
    background: var(--color-secondary);
    color: white;
}

.btn-outline-accent {
    background: transparent;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
}

.btn-outline-accent:hover:not(:disabled) {
    background: var(--color-accent);
    color: white;
}

/* ===== VARIANTES GHOST ===== */
.btn-ghost {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-ghost:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-ghost-dark {
    background: rgba(0, 0, 0, 0.1);
    color: var(--color-gray-800);
    border: 2px solid rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
}

.btn-ghost-dark:hover:not(:disabled) {
    background: rgba(0, 0, 0, 0.15);
    border-color: rgba(0, 0, 0, 0.3);
}

/* ===== ESTADOS ESPECIALES ===== */
.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ===== GRUPOS DE BOTONES ===== */
.btn-group {
    display: inline-flex;
    gap: var(--spacing-3);
}

.btn-group-attached {
    display: inline-flex;
}

.btn-group-attached .btn {
    border-radius: 0;
    border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-group-attached .btn:first-child {
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.btn-group-attached .btn:last-child {
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    border-right: none;
}

.btn-group-attached .btn:only-child {
    border-radius: var(--radius-lg);
    border-right: none;
}

/* ===== BOTONES CON ICONOS ===== */
.btn-icon-only {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 50%;
}

.btn-icon-only.btn-sm {
    width: 32px;
    height: 32px;
}

.btn-icon-only.btn-lg {
    width: 48px;
    height: 48px;
}

/* ===== BOTONES FLOTANTES ===== */
.btn-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: var(--z-fixed);
    border-radius: 50%;
    width: 56px;
    height: 56px;
    padding: 0;
    box-shadow: var(--shadow-xl);
    animation: pulse 2s infinite;
}

.btn-float:hover {
    transform: scale(1.1);
    animation: none;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(220, 38, 38, 0); }
    100% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0); }
}

/* WhatsApp específico */
.btn-whatsapp {
    background: #25D366;
    color: white;
}

.btn-whatsapp:hover:not(:disabled) {
    background: #1ea952;
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
}

.btn-whatsapp.btn-float {
    animation-name: pulse-whatsapp;
}

@keyframes pulse-whatsapp {
    0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(37, 211, 102, 0); }
    100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .btn-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn-group .btn {
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
    
    .btn-float {
        bottom: 20px;
        right: 20px;
        width: 48px;
        height: 48px;
    }
}

@media (max-width: 480px) {
    .btn {
        font-size: var(--font-size-sm);
        padding: var(--spacing-3) var(--spacing-4);
    }
    
    .btn-lg {
        font-size: var(--font-size-base);
        padding: var(--spacing-4) var(--spacing-5);
    }
}