/* app/static/css/components/buttons.css */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
    cursor: pointer;
    text-decoration: none;
    line-height: 1;
}

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Button Sizes */
.btn-small {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
}

.btn-large {
    padding: var(--space-lg) var(--space-xl);
    font-size: 1.125rem;
}

.btn-xlarge {
    padding: var(--space-xl) var(--space-2xl);
    font-size: 1.25rem;
}

/* Button Variants */
.btn-primary {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover:not(:disabled) {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
    transform: translateY(-2px);
}

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

.btn-outline:hover:not(:disabled) {
    background: var(--primary-blue);
    color: white;
    transform: translateY(-2px);
}

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

.btn-ghost:hover:not(:disabled) {
    background: var(--primary-blue-light);
    color: var(--primary-blue);
}

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

.btn-success:hover:not(:disabled) {
    background: #24b563;
    border-color: #24b563;
    transform: translateY(-2px);
}

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

.btn-warning:hover:not(:disabled) {
    background: #e6b435;
    border-color: #e6b435;
    transform: translateY(-2px);
}

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

.btn-error:hover:not(:disabled) {
    background: #e04a4f;
    border-color: #e04a4f;
    transform: translateY(-2px);
}

/* Button States */
.btn.loading {
    pointer-events: none;
    opacity: 0.8;
}

.btn.loading::after {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: var(--space-sm);
}

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

.btn-full {
    width: 100%;
}

/* Icon Buttons */
.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

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

/* Button Groups */
.btn-group {
    display: inline-flex;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
}

.btn-group .btn {
    border-radius: 0;
    border: none;
    margin: 0;
}

.btn-group .btn:not(:last-child) {
    border-right: 1px solid var(--border);
}