/* ===== BUTTON COMPONENT STYLES ===== */

/* Base Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-md);
    font-weight: var(--weight-medium);
    font-size: var(--text-sm);
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    outline: none;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--text-xs);
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--text-base);
    border-radius: var(--radius-lg);
}

.btn-xl {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--text-lg);
    border-radius: var(--radius-xl);
}

/* Button Variants */
.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--glass-border);
}

.btn-primary:hover {
    background: var(--gradient-primary);
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

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

.btn-secondary {
    background: var(--btn-secondary-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
}

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

.btn-accent {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--glass-border);
}

.btn-accent:hover {
    background: var(--gradient-primary);
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

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

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

.btn-outline:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-focus);
}

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
}

.btn-ghost:hover {
    background: var(--bg-tertiary);
}

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

.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-top: -8px;
    margin-left: -8px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

.btn-secondary.btn-loading::after,
.btn-outline.btn-loading::after,
.btn-ghost.btn-loading::after {
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-top-color: var(--text-primary);
}

/* Button with Icon */
.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: var(--radius-full);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-icon.btn-sm {
    width: 28px;
    height: 28px;
}

.btn-icon.btn-lg {
    width: 44px;
    height: 44px;
}

/* Button Group */
.btn-group {
    display: inline-flex;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.btn-group .btn {
    border-radius: 0;
    border-right: 1px solid rgba(0, 0, 0, 0.1);
}

.btn-group .btn:first-child {
    border-top-left-radius: var(--radius-md);
    border-bottom-left-radius: var(--radius-md);
}

.btn-group .btn:last-child {
    border-top-right-radius: var(--radius-md);
    border-bottom-right-radius: var(--radius-md);
    border-right: none;
}

/* Button with Ripple Effect */
.btn-ripple {
    position: relative;
    overflow: hidden;
}

.btn-ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.btn-ripple:focus:not(:active)::after {
    animation: ripple 0.6s ease-out;
}

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

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    20% {
        transform: scale(25, 25);
        opacity: 0.5;
    }
    100% {
        opacity: 0;
        transform: scale(40, 40);
    }
}