/* =============================================
   BUTTONS COMPONENT - JJ System
   Premium button styles using theme variables
   ============================================= */

/* ===== BASE BUTTON ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.625rem 1.25rem;
    /* 10px 20px */
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.btn:focus {
    outline: 2px solid var(--primary-light);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ===== PRIMARY BUTTON (Uses customizable theme colors) ===== */
.btn-primary {
    background: var(--primary-color);
    color: var(--contrast-color);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-primary:active {
    background: var(--primary-dark);
    box-shadow: var(--shadow-sm);
    transform: translateY(0);
}

/* ===== SECONDARY BUTTON ===== */
.btn-secondary {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

.btn-secondary:hover {
    background: var(--secondary-dark);
    border-color: var(--secondary-dark);
}

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

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

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

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

/* ===== SEMANTIC BUTTONS ===== */
.btn-success {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

.btn-success:hover {
    background: var(--success-hover);
    border-color: var(--success-hover);
}

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

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

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

.btn-danger:hover {
    background: var(--danger-hover);
    border-color: var(--danger-hover);
}

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

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

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

.btn-warning:hover {
    background: var(--warning-hover);
    border-color: var(--warning-hover);
}

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

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

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

.btn-info:hover {
    background: var(--info-hover);
    border-color: var(--info-hover);
}

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

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

/* ===== GHOST BUTTON ===== */
.btn-ghost {
    background: transparent;
    color: var(--gray-700);
    border-color: transparent;
}

.btn-ghost:hover {
    background: var(--gray-100);
}

/* ===== SIZES ===== */
.btn-sm {
    padding: 0.375rem 0.875rem;
    /* 6px 14px */
    font-size: var(--text-sm);
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    /* 14px 28px */
    font-size: var(--text-lg);
}

.btn-xl {
    padding: 1.125rem 2.25rem;
    /* 18px 36px */
    font-size: var(--text-xl);
}

/* ===== ICON BUTTONS ===== */
.btn-icon {
    width: 2.5rem;
    /* 40px */
    height: 2.5rem;
    padding: 0;
    border-radius: var(--radius-lg);
}

.btn-icon.btn-sm {
    width: 2rem;
    /* 32px */
    height: 2rem;
}

.btn-icon.btn-lg {
    width: 3rem;
    /* 48px */
    height: 3rem;
}

/* Icon only on mobile pattern */
@media (max-width: 767px) {
    .btn-mobile-icon {
        width: 2.5rem;
        height: 2.5rem;
        padding: 0;
    }

    .btn-mobile-icon .btn-text {
        display: none;
    }
}

@media (min-width: 768px) {
    .btn-mobile-icon {
        width: auto;
        padding: 0.625rem 1.25rem;
    }

    .btn-mobile-icon .btn-text {
        display: inline;
    }
}

/* ===== BLOCK BUTTON ===== */
.btn-block {
    display: flex;
    width: 100%;
}

/* ===== BUTTON GROUP ===== */
.btn-group {
    display: inline-flex;
    gap: var(--spacing-sm);
}

.btn-group-vertical {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* ===== LOADING STATE ===== */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: "";
    position: absolute;
    width: 1rem;
    height: 1rem;
    top: 50%;
    left: 50%;
    margin-left: -0.5rem;
    margin-top: -0.5rem;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: var(--radius-full);
    animation: btn-spin 0.6s linear infinite;
}

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

/* ===== FLOATING ACTION BUTTON (FAB) ===== */
.btn-fab {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 3.5rem;
    height: 3.5rem;
    padding: 0;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-fixed);
}

.btn-fab:hover {
    box-shadow: var(--shadow-2xl);
    transform: scale(1.05);
}

/* ===== TOUCH TARGETS (Mobile) ===== */
@media (max-width: 767px) {
    .btn {
        min-height: 44px;
        /* iOS minimum touch target */
        min-width: 44px;
    }

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

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    .btn {
        transition: none;
    }
}

/* Focus visible for keyboard navigation */
.btn:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}