/* ========================================
   BUTTON COMPONENTS
   Springs AI Solutions
   ======================================== */

/* Base Button */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    padding: var(--spacing-3) var(--spacing-6);
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

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

.btn-text {
    position: relative;
    z-index: 1;
}

.btn-icon {
    font-size: var(--text-lg);
    transition: transform var(--transition-fast);
}

/* Primary Button */
.btn-primary {
    color: var(--color-bg-deep);
    background: var(--color-primary-400);
    border-color: var(--color-primary-400);
    box-shadow: var(--glow-subtle);
}

.btn-primary:hover {
    background: var(--color-primary-300);
    border-color: var(--color-primary-300);
    box-shadow: var(--glow-medium);
    transform: translateY(-2px);
}

.btn-primary:hover .btn-icon {
    transform: translateX(4px);
}

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

/* Secondary Button */
.btn-secondary {
    color: var(--color-text-secondary);
    background: var(--color-bg-surface);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    color: var(--color-primary-400);
    border-color: var(--color-primary-500);
    background: var(--color-bg-elevated);
}

/* Outline Button */
.btn-outline {
    color: var(--color-primary-400);
    background: transparent;
    border-color: var(--color-primary-500);
}

.btn-outline:hover {
    background: rgba(0, 255, 255, 0.1);
    border-color: var(--color-primary-400);
    box-shadow: var(--glow-subtle);
}

/* Ghost Button */
.btn-ghost {
    color: var(--color-text-secondary);
    background: transparent;
    border-color: transparent;
    padding: var(--spacing-2) var(--spacing-4);
}

.btn-ghost:hover {
    color: var(--color-primary-400);
    background: rgba(0, 255, 255, 0.05);
}

/* Large Button */
.btn-large {
    font-size: var(--text-base);
    padding: var(--spacing-4) var(--spacing-8);
}

/* Small Button */
.btn-small {
    font-size: var(--text-xs);
    padding: var(--spacing-2) var(--spacing-4);
}

/* Full Width Button */
.btn-full {
    width: 100%;
}

/* Button with Glow Animation */
.btn-glow {
    animation: button-glow 2s ease-in-out infinite;
}

@keyframes button-glow {
    0%, 100% {
        box-shadow: var(--glow-subtle);
    }
    50% {
        box-shadow: var(--glow-medium);
    }
}

/* Button Loading State */
.btn-loading {
    pointer-events: none;
}

.btn-loading .btn-text {
    opacity: 0;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Button Group */
.btn-group {
    display: flex;
    gap: var(--spacing-4);
}

.btn-group-vertical {
    flex-direction: column;
}

/* Responsive */
@media (max-width: 768px) {
    .btn-large {
        font-size: var(--text-sm);
        padding: var(--spacing-3) var(--spacing-6);
    }

    .btn-group {
        flex-direction: column;
    }
}