/* =============================================================================
   BUTTON COMPONENTS
   ============================================================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 10px 20px;
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 500;
    line-height: 1.4;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    text-decoration: none;
}

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

.btn i {
    font-size: 1.1em;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(0, 82, 255, 0.35);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-card);
    border-color: var(--border-hover);
}

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

.btn-ghost:hover:not(:disabled) {
    background: var(--bg-elevated);
    color: var(--text-main);
}

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

.btn-success:hover:not(:disabled) {
    background: #0DA372;
}

/* Danger Button */
.btn-danger {
    background: var(--danger-light);
    border-color: var(--danger-border);
    color: var(--danger);
}

.btn-danger:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.2);
}

/* Connect Wallet Button */
.btn-connect {
    background: var(--primary-light);
    border-color: var(--primary-border);
    color: var(--primary);
    font-weight: 600;
}

.btn-connect:hover:not(:disabled) {
    background: rgba(0, 82, 255, 0.15);
}

.btn-connect.connected {
    background: var(--success-light);
    border-color: var(--success-border);
    color: var(--success);
}

/* Button Sizes */
.btn-sm {
    padding: 6px 12px;
    font-size: var(--text-xs);
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: 14px 28px;
    font-size: var(--text-base);
}

.btn-block {
    width: 100%;
}

/* Icon-only Button */
.btn-icon {
    padding: 10px;
    aspect-ratio: 1;
}

.btn-icon.btn-sm {
    padding: 6px;
}

/* Loading State */
.btn .loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Toggle Button */
.btn-toggle {
    background: var(--primary-light);
    border-color: var(--primary-border);
    color: var(--primary);
    font-weight: 500;
}

.btn-toggle:hover:not(:disabled) {
    background: rgba(0, 82, 255, 0.15);
}

.btn-toggle.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* Spinner */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.btn-primary .spinner {
    border-color: rgba(255, 255, 255, 0.3);
    border-top-color: white;
}