.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.15s, background 0.15s;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-block {
    width: 100%;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.35rem;
    font-size: 0.9rem;
    color: var(--muted);
}

.form-group input {
    background: var(--surface);
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.alert-error {
    background: rgba(239, 68, 68, 0.15);
    color: #fecaca;
}

.alert-success {
    background: rgba(34, 197, 94, 0.15);
    color: #bbf7d0;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
}

.progress-bar {
    height: 8px;
    background: var(--border);
    border-radius: 999px;
    overflow: hidden;
    margin: 0.75rem 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), #818cf8);
    transition: width 0.3s;
}

.badge {
    background: var(--primary);
    color: #fff;
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    font-size: 0.75rem;
    text-transform: uppercase;
}

.loader {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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