/* Quiz Whiz - Button Styles | Reusable button components and variants used across all pages for consistent UI interactions */

/* Button Styles */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-size: 1rem;
    margin-right: 1rem;
}

.btn i {
    font-size: 0.875rem;
    opacity: 0.9;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-medium);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

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

.btn-secondary:hover {
    background: var(--border-color);
    transform: translateY(-2px);
}

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

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

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn:disabled,
.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn:disabled:hover,
.btn.disabled:hover {
    transform: none !important;
    box-shadow: none;
}

/* Difficulty buttons */
.btn-easy {
    background: var(--success-color);
    color: white;
    box-shadow: var(--shadow-medium);
}

.btn-easy:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

.btn-medium {
    background: var(--warning-color);
    color: white;
    box-shadow: var(--shadow-medium);
}

.btn-medium:hover {
    background: #d97706;
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

.btn-hard {
    background: var(--error-color);
    color: white;
    box-shadow: var(--shadow-medium);
}

.btn-hard:hover {
    background: #dc2626;
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

/* Active Button States for Quiz Setup */
.question-count-selector .btn.active,
.difficulty-selector .btn.active,
.quiz-mode-selector .btn.active {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-medium);
    font-weight: 600;
    transform: translateY(-1px);
}

.question-count-selector .btn.active:hover,
.difficulty-selector .btn.active:hover,
.quiz-mode-selector .btn.active:hover {
    background: #7c3aed;
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

/* Button Utility Classes */
.btn-block {
    width: 100%;
    display: block;
}

/* Processing State for Edit/Delete Buttons */
.edit-btn.processing,
.delete-btn.processing {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.edit-btn.processing::after,
.delete-btn.processing::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 12px;
    height: 12px;
    margin: -6px 0 0 -6px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: button-spin 0.8s linear infinite;
}

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

/* Disabled state improvements */
.edit-btn:disabled,
.delete-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.edit-btn:disabled:hover,
.delete-btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* Deck Filter Container and Rename Button */
.deck-filter-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.deck-filter-container select {
    flex: 1;
}

.btn-rename {
    background: var(--surface-color);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: auto;
    font-size: 0.875rem;
}

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

.btn-rename i {
    font-size: 0.875rem;
}

.btn-rename:disabled,
.btn-rename.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--surface-color);
    color: var(--text-secondary);
    border-color: var(--border-color);
}

.btn-rename:disabled:hover,
.btn-rename.disabled:hover {
    background: var(--surface-color);
    color: var(--text-secondary);
    border-color: var(--border-color);
    transform: none;
    box-shadow: none;
}